JP3382421B2 - Information recording or reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in, for example, a recording device, a reading device, a copying machine or the like, in which a light beam is deflected and scanned on a sheet such as a film by an optical unit to perform recording or reading. The present invention relates to a recording or reproducing device for information.

[0002]

2. Description of the Related Art Conventionally, optical units generally used in, for example, an information recording apparatus are known as shown in FIGS. The optical unit has a housing 1, a motor 3 to which a rotary polygon mirror 2 is directly connected is arranged on the inner bottom surface of the housing 1, and a laser light source 4 which emits a light beam toward the rotary polygon mirror 2 is arranged on a side wall. The collimator lens 5, the shielding member 6, the polarization beam splitter 8 supported by the holder 7, and the cylindrical lens 9 are provided between the laser light source 4 side. Further, a side wall of the housing 1 is provided with an emission window 1a directed to a not-shown scanned body of the recording apparatus main body. The emission window 1a and the rotary polygon mirror 2 are provided.
A spherical lens 10 and a toric lens 11 are provided between and.

The shielding member 6 is held by a holding metal fitting (not shown) attached to the housing 1 in a state in which the optical path of the light beam is shielded, and is movable in a direction orthogonal to the optical path. Solenoid 12 connected to member 6
Is operated, the shield member 6 is retracted from the optical path. In a general scanning optical system, such a shielding member 6 does not have a drive source, and is often operated by a link mechanism or the like that is interlocked with the opening / closing of the cover of the apparatus and the presence / absence of a cartridge section.

The polarization beam splitter 8 is a holder 7
Is rotatably supported around the optical axis of the light beam by a support member provided in the housing 1. As shown in FIG. 13, a toothed pulley portion 7a is formed on the outer periphery of the holder 7. . A pulse motor 13 is attached to the housing 1,
Toothed belt 1 between the drive shaft and toothed pulley 14
5 has been passed over.

In this optical unit, after the laser light source 4 is made to emit light in a state where the optical path is shielded by the shield member 6, the solenoid 12 is operated to retract the shield member 6 from the optical path of the light beam. The light beam is collimated by the collimator lens 5, passes through the polarization beam splitter 8 and the cylindrical lens 9, reaches the rotary polygon mirror 2, is reflected by the mirror surface, and is deflected and scanned through the spherical lens 10 and the toric lens 11. , Is emitted from the emission point 1a, and an image is formed on the object to be scanned for recording.

During this period, the driving current of the laser light source 4 is modulated based on the recorded image data to change the intensity of the light beam. Further, the pulse motor 13 is driven to rotate the holder 7, and the polarization beam splitter 8 changes the light amount of the light beam incident on the rotary polygon mirror 2, thereby changing the sensitivity depending on the type of film to be scanned. Recording is performed on the scanned object without being affected by the developing conditions.

[0007]

However, since the optical unit is required to have high precision in the arrangement of the optical parts, the casing needs to have high precision, but there is also a demand to reduce the cost as much as possible. To meet both of these requirements, the housing is often made by plastic molding. However, if the motor, the solenoid, and their control circuits are provided in the same housing, the housing is likely to be deformed by the heat generated by these operations, which may deteriorate the optical performance.

Further, in such an apparatus, the optical unit is generally incorporated inside the apparatus, and it is not possible to attach / detach only the optical unit without removing other parts or units. Therefore, at the time of assembling and adjusting the apparatus or at the time of maintenance of the optical unit, other parts and units must be removed each time, which is very troublesome and time-consuming.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide a recording / reproducing apparatus of low manufacturing cost, which prevents deterioration of the optical performance of the optical unit and can be easily attached / detached regardless of the arrangement position of the optical unit in the apparatus.

[0010]

An information recording or reproducing apparatus according to a first aspect of the present invention for achieving the above object comprises a light source for irradiating a light beam and an optical element for converting the light beam into a predetermined optical characteristic. And a deflection scanning means for deflecting and scanning the light beam, a subunit comprising a casing is integrally attached to a flat plate-shaped base to form an optical unit, and the optical unit is provided outside the subunit. Drive means for driving the optical element and a control circuit for controlling the drive means are provided.

An information recording or reproducing apparatus according to the second invention comprises a light source for irradiating a light beam, an optical element for converting the light beam into a predetermined optical characteristic, and a deflection scanning means for deflecting and scanning the light beam. An optical unit by integrally mounting a sub-unit composed of a housing provided inside with a flat plate-shaped base, and driving means for driving the optical element on the base outside the sub-unit; And a control circuit for controlling the sheet-shaped recording medium, a facing frame member that forms a moving path of the sheet-shaped recording medium, and the optical unit is attached in a state of bridging the facing frame member.

An information recording or reproducing apparatus according to the third invention comprises a light source for irradiating a light beam, an optical element for converting the light beam into a predetermined optical characteristic, and a deflection scanning means for deflecting and scanning the light beam. An optical unit by integrally mounting a sub-unit composed of a housing provided inside with a flat plate-shaped base, and driving means for driving the optical element on the base outside the sub-unit; And a control circuit for controlling the sub-laid magazine for storing an unused sheet-shaped recording medium and at least one of a receive magazine for storing a used sheet-shaped recording medium. Is detachable from one side, and the optical unit is attachable and detachable from the same direction as the detaching direction of the magazine.

[0013]

In the information recording / reproducing apparatus of the first invention having the above-mentioned structure, when recording or reproducing, the information is generated from the drive means for moving the optical element of the optical unit and the control circuit for controlling this drive means. Heat is generated outside the subunit.

In the information recording or reproducing apparatus according to the second aspect of the present invention, the base attached in a bridging manner to the opposing frame member is integrally attached to and detached from the sub unit at the time of maintenance of the optical unit.

In the information recording or reproducing apparatus of the third invention, the base and the subunit are integrally attached and detached from the same direction as the magazine attaching and detaching direction at the time of maintenance of the optical unit.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the embodiments shown in FIGS. FIG. 1 is a block diagram of a recording device 20 according to the first embodiment. The recording device 20 includes a recording unit 21, a base 22 on which the recording unit 21 is placed, and a developing unit 23 provided above the recording unit 21, and the entire outer casing 20a.
It is light-tightly covered by and is integrally configured.

The recording unit 21 has a supply magazine 24 at the top, an optical unit 25 at the center, and a receive magazine 26 at the bottom in the horizontal direction. The supply magazine 24 stores the stacked unused films S with their photosensitive surfaces facing downward, and the receive magazine 26 stores the recorded films S. Both magazines 24 and 26 have lids 27 that can be opened and closed,
Openings 24a, 26a having 28 are provided, and by closing these lids 27, 28, the magazines 24, 2
The inside of 6 can be kept light-tight.

Between the opening 24a of the supply magazine 24 and the receive magazine 26, outer and inner guides 29a, 29b and 30a, 30b which are parallel to each other at regular intervals are provided.
Circular conveying paths 29 and 30 composed of and are provided in a semicircular shape so as to be adjacent to each other in a continuous manner. A first conveying roller pair 31 composed of upper and lower rollers is provided at an end of the one conveying path 29 on the opening 24a side, and at least one of the roller pair 31 is a driving roller. The upper roller has a structure in which a short roller is arranged on the shaft, and the guide 2
Through a cutout hole provided in 9a, it is movable between a contact position for contacting the lower roller and a separated position.

The other conveying path 30 extends to the lower side of the receive magazine 26 in parallel therewith, and is provided at a position below the receive magazine 26 with upper and lower rollers.
A conveyance roller pair 32 is provided. Furthermore, the transport path 30
Is extended upward from the rear end side of the receive magazine 26,
It is connected to an opening 33 provided on the side surface of the developing unit 23. A third conveying roller pair 34 and a fourth conveying roller pair 35 are provided in this extension portion at appropriate intervals.

Further, between the rear end of the conveying path 30 in the conveying direction and the front end of the conveying path 29 in the conveying direction, the first and second sub-scanning roller pairs 36, 37 rotatable at a constant speed with high accuracy. The sub-scanning unit 38 having the above is provided. Above the left side of the receive magazine 26 is a fifth roller composed of upper and lower rollers.
A pair of transport rollers 39 is provided, and the rollers on the lower side of the transport roller 39 can be brought into contact with and separated from the rollers on the upper side. Further, the conveyance path 40 that joins the conveyance path 30 from the position of the fifth conveyance roller pair 39 is configured by a pair of arc-shaped guides 40a and 40b.

At the lower end of the outer guide 40a, a movable guide 41 which is rotatable between a closed position indicated by a chain line for closing the conveying path 30 and a releasing position indicated by a solid line for releasing the conveying path 30 is provided by a support shaft. The guide 30a is provided with a notch at a portion corresponding to the tip of the movable guide 41 so that the movable guide 41 does not interfere with the guide 30a when closed.

Further, on the upper side of the supply magazine 24,
A separation unit 42 parallel to this is provided. The separating unit 42 is provided with a plurality of suction cups 43 in line from the front side to the back side, and the suction cups 43 are inserted through the cutout holes formed in the guide 29a to the position a in the supply magazine 24 and the first conveying roller. Position b on the near side of pair 31
And driving means (not shown), supporting means, linking means, and the like, which move to the position c above them.

As shown in FIG. 2, the optical unit 25 and the separating unit 42 face each other at the front end side and the rear end side of the magazines 24 and 28, and are erected on the frame base 45 of the main body base 44 of the recording section 21. , 45 are attached to both ends in a bridging manner by screws 46, 46 and 47, 47, respectively. Further, the sub-scanning unit 38 is the magazine 2
4, a plurality of screws 48 are provided on the frame member 45 on the front end side of
It is attached by and is removable. As shown in FIG. 3, the supply magazine 24 and the receive magazine 26 are stored in storage chambers 49 and 50, respectively, so that they can be freely taken in and out.
5, 45 and the frame members 45, 45 on the rear side of the recording unit 21.
And a flat plate-shaped frame member 51 which is erected so as to be opposed thereto. Incidentally, 24b and 26b are pull-out handles attached to the supply magazine 24 and the receive magazine 26, respectively.

As shown in FIG. 2, on the front side of the recording unit 21, the supply magazine 24, the optical unit 25, the receive magazine 26, the separation unit 42, and the sub-scanning unit 38 can be attached to and detached from the outer case 20a. Window 5
2 is provided, and a door 54 supported by a hinge 53 so as to be openable and closable is attached to the window 52.

As shown in FIG. 4, the optical unit 25 has a flat box-shaped base 60 formed by bending the peripheral edge of a rectangular flat plate upward to form a side wall 60a, and the front side wall 60a extends left and right. Has been done. Holes 61, 61 are provided at both ends of the back side wall 60a, and the frame member 5 is
1, the projections 55, 55 provided on the first side are removably fitted, and the both ends of the front side wall 60a are screw 47, as described above.
It is fixed to the frame members 45, 45 by 47.

Inside the base 60, there is attached a flat box-shaped subunit 62 which is formed by casting or plastic molding and has a special polygonal shape whose inside is substantially sealed by a lid which will be described later. As the mounting portion, the projections 6 are formed on the bottom of the sub-unit 62 so as to project laterally at three locations.
2a is provided, and the convex portion 62a is attached to the base 60 by a screw 63.

A rotary polygon mirror 65 directly connected to the motor 64 is fixed in the sub unit 62. Further, the semiconductor laser light source 6 connected to a drive circuit (not shown)
6 is held together with the collimator lens 67 in the laser unit barrel 68 directed toward the rotary polygon mirror 65 and fixed to one side wall 62b, and is transmitted through the collimator lens 67 so that the light beam is incident on the rotary polygon mirror 65. Has become. Further, the semiconductor laser light source 66 and the collimator lens 67 have a mechanism in which the relative positional relationship between them can be adjusted from the outside, and are attached while maintaining an appropriate state.

A polarization beam splitter 70 held by a holder 69 on the laser unit lens barrel 68 side is rotatably supported by a supporting member (not shown) between the laser unit lens barrel 68 and the rotary polygon mirror 65. The cylindrical lens 72 held by the lens holder 71 is provided on the rotary polygon mirror 65 side. A toothed pulley portion 69a is formed on the outer peripheral surface of the holder 69, a pulse motor 73 is provided on the base 60, and a toothed belt is provided on the toothed pulley 74 and the toothed pulley portion 69a attached to the motor shaft of the pulse motor 73. 75 is bridged through the notch of the side wall 62b, and the beam splitter 7 is driven by the pulse motor 73.
0 is rotated around the optical axis of the light beam.

Further, a shielding member 76 is held between the laser unit barrel 68 and the holder 69 by a holding metal fitting (not shown) so as to block the optical path of the light beam from above the base 60 through the cutout portion of the side wall 62b. Therefore, it is movable in the direction orthogonal to the optical path. The shielding member 76 includes
A solenoid 77 provided on the base 60 is connected, and the operation of the solenoid 77 causes the shielding member 76 to move forward and backward from the optical path. Reference numeral 78 is a coil spring for urging the shield member 76 to its original position when the solenoid 77 is not operated.

The side wall 6 of the subunit 62 and the base 60 on the side of the first and second sub-scanning roller pairs 36 and 37.
2b and 60 are provided with emission windows 79 and 80, respectively, and the rotary polygon mirror 65 and the emission window 7 are provided on the subunit 62.
A spherical lens 81 and a toric lens 82 are provided between 9 and a small reflecting mirror 83 is provided near one end of the exit window 79.

On the side wall 60a on the front side of the base 60, a sensor 84 for detecting the reflected light in which a part of the light beam is reflected by the reflection mirror 83 is attached by a substrate 85. On the base 60, in addition to the solenoid 77 and the pulse motor 73, a printed circuit board 86 for controlling a light beam and a printed circuit board 87 for driving and controlling the motor 64 of the rotary polygon mirror 65 are provided. Further, a connector 88 is provided on the outer surface of the back side wall 60a, and when the optical unit 25 is attached to the apparatus main body 21, the connector 9 attached to the frame member 51 by the bracket 89.
0 to couple the optical unit 25 to the device 20 electrically.

As shown in FIG. 5, in the optical unit 25, the whole of the subunit 62 and the base 60 is covered with a lid 91 in a substantially light-tight manner to prevent dust from entering the inside. Note that the base 60 and the lid 91 may be made of metal to electrically cut off the inside and the outside to prevent the emission of noise from the inside and the influence of noise from the outside.

As shown in FIG. 5, the bottom wall 62c of the subunit 62 is provided with a raised portion 62d for setting the spherical lens 81 and the toric lens 82 according to the optical path. Is a protrusion 6 near the protrusion 62a.
2e is provided, and only the protrusion 62e is brought into contact with the surface of the base 60, so that the subunit 62 can be mounted on the base 60 even if the flatness of the base 60 is slightly different. It does not distort.

The pulse motor 7 is attached to the base 60.
A fan for cooling a drive source such as the drive circuit 3 or the printed circuit board 85 may be attached. Further, instead of the polarization beam splitter 70, a disk in which filters having different transmittances are arranged on the same radius from the rotation center may be provided and rotated. In that case, a claw gear may be provided on the disk without using the pulse motor, and the claw meshing with the disk may be driven by a solenoid to intermittently drive the disk. The amount of transmitted light may be changed by translating a filter having a wedge-shaped cross section in a direction orthogonal to the optical axis.

An electric control unit, a developing solution storage tank, and the like are built in the table 22 on which the recording unit 21 is placed. The developing section 23 is for developing the film S that has been recorded by the recording section 21, is provided with a pair of receiving and conveying rollers 92 near the opening 33, and is provided with the outer case 20.
An opening 93 is also provided on the side of the opening a that faces the opening 33, and a tray 94 is attached to the outside of the outer case 20a at a position below the opening 93.

When recording is performed by this recording device, the recording unit 21
Open the door 54 of the above and insert the supply magazine 24 and the receive magazine 26 into the storage chamber 49 and the storage chamber 50.
And the recording means is instructed by an instruction means (not shown), the lids 27 and 28 are opened, and the suction cup 43 of the separation unit 42 is opened.
Moves to the position a and sucks the uppermost film S in the supply magazine 24. At this time, the first conveying roller pair 3
1 are in contact with each other and are rotating. Next, when the suction cup 43 is moved to the position b and the film S is sandwiched by the first transport roller pair 31, the suction cup 43 releases the suction of the film S, retracts to the position c, and then returns to the original position.

The film S sandwiched between the first conveying roller pair 31 is conveyed in the conveying path 29 and sent to the first and second sub-scanning roller pairs 36 and 37, and the first and second sub-scanning roller pairs. 36 and 37 start rotating. At the same time, the solenoid 77 of the optical unit 25 is actuated to retract the shield member 76 from the optical path of the light beam, and the semiconductor laser light source 66 sends a drive current modulated by the drive circuit based on the image signal to emit light. The light beam is collimated by the collimator lens 67. The light beam is split by the polarization beam splitter 70 that is rotated by the drive of the pulse motor 73 while changing the distribution ratio, and one of the split light beams passes through the hole formed in the holder 69 and passes through the cylindrical lens 72. The light is transmitted and irradiated on the rotary polygon mirror 65.

The light beam is reflected by the reflecting surface of the rotary polygon mirror 65, passes through the spherical lens 81 and the toric lens 82, is scanned, and is irradiated onto the film S to record an image. Here, prior to scanning, the light beam outside the effective image area is reflected by the reflection mirror 83, is irradiated onto the sensor 84 through the cutout portion of the side wall 62a, and the timing for writing information is detected.

The film S is conveyed in the conveying path 30 while recording an image, recording is completed immediately before the leading end of the film S reaches the second conveying roller pair 32, and the second conveying roller pair 32 causes the film S to move to the rear side of the film S. The sheet is conveyed until the end passes the position of the movable guide 41.

When the recorded film S is directly sent to the developing section 23, the film S is continuously conveyed in the conveying path 30 by the third conveying roller pair 34 and the fourth conveying roller pair 35, and passes through the opening 33. It is sent to the developing unit 23.
Although detailed description is omitted, in the developing unit 23, the film S, which has been received and developed by the pair of receiving and conveying rollers 92, is discharged to the tray 94 through the opening 93.

When developing with another developing machine or when the developing section 23 fails, when the detecting means (not shown) detects that the rear end of the film S has passed the movable guide 41, it is released until then. The movable guide 41, which was in the position, becomes the closed position, and the second conveying roller pair 32 reverses.
Then, the film S is moved by the movable guide 41 to the transport path 4
The fifth transport roller pair 39 starts to rotate and the film S is fed into the receive magazine 26.

In this recording apparatus, when the optical unit 25 is removed for maintenance or adjustment, screws 4 are used.
By removing 7, the base 60, which is integrated with the subunit 62, can be pulled out from the recording portion 21 in the direction of the arrow in FIG.
By fixing with 7, it can be mounted in the recording unit 21. At this time, the connectors 88 and 90 are automatically combined and separated as the optical unit 25 is attached and detached.

As described above, only the optical unit 25 can be easily attached to and detached from the recording section without removing the components other than the optical unit 25, and the optical unit 2
There is no need to bother disconnecting the connectors 88 and 90 when attaching or detaching the connector 5, and it is possible to prevent an accident in which the optical unit 25 is taken out without disconnecting the connectors 88 and 90.

Further, the optical unit 25 is supported by bridging between the frame members 45, 45 as described above, and the magazine 2
As with Nos. 4 and 28, if the optical unit 25 is attempted to be attached and detached in the width direction, the length of the optical unit 25 becomes long, and in order to mold the base 60 and its lid 91 with a plastic mold, a large molding machine is required and The cost of producing the mold is also high.

Further, when a large-sized component is produced, the entire component is warped, resulting in a reduction in component accuracy and a large dimensional change due to temperature change. In addition, when the frame members 45 of the recording unit are supported by a bridge due to insufficient rigidity, various problems such as bending of the optical unit 25 occur.

However, in the present embodiment, the parts to be molded by the plastic mold are only the housing of the subunit 62 of a size in which only optical parts requiring high precision are arranged, and the subunit 62 has high rigidity. Since the metal plate is attached to the bent base 60, the parts that do not require precision in attachment are attached to the parts other than the subunit 62 on the base 60, and these parts are integrally attached to and detached from the apparatus as the optical unit 25. A highly accurate optical unit 25 can be provided.

A base 60 having a structure in which a sheet metal is bent
Even if the flatness of the surface on which the subunit 62 is mounted is not very high, since the projection is provided on the bottom surface of the subunit 62, the flat surface of the sheet metal forming the base 60 is mounted by the projection. It is possible to eliminate the influence such as distorting 62. Further, with such a bent part of the sheet metal, it is not necessary to manufacture an expensive mold, and the required rigidity can be secured at a low cost.

Furthermore, since the base 60 and the lid 91 of the optical unit 25 are made of a material having good conductivity such as metal,
It is possible to electrically shield the entire optical unit 25, prevent radio wave emission from the optical unit 25,
It is possible to eliminate the influence of intruding radio waves from the outside.

Further, the heat generating parts such as the motor 73, the solenoid 77 and their control circuits are included in the base 6
Since it is attached to a portion other than the upper subunit 62, the heat dissipation effect is improved and deformation of the subunit 62 due to heat is prevented.

FIG. 6 is a block diagram of the second embodiment.
There is no conveyance roller pair 31, and the first and second sub-scanning roller pair 3
6, 37 are provided above the front end of the supply magazine 24, the conveyance path 29 is omitted, the conveyance path 30 is extended to the vicinity of the second sub-scanning roller pair 37, and the sixth conveyance is performed immediately after the movable guide 41. A roller pair 100 is additionally provided. Further, in the optical unit 25, the base 60 is extended to the front from the front end of the supply magazine 24, and the light beam reflected by the rotary polygon mirror 65 is extended to the first and second sub-scans in the extended portion as shown in FIG. A reflection mirror 101 that scans toward a position between the roller pair 36 and 37 is provided,
The lid 91 is provided with a hole 91a through which the light beam passes.

When recording is carried out by the apparatus thus constructed, the film S sucked from the supply magazine 24 by the suction cup 43 is directly sandwiched between the first sub-scanning roller pair 36. The film S is scanned and recorded by the light beam reflected by the reflection mirror 101 while being fed by the first and second sub-scanning roller pairs 36 and 37, and the rear end of the film S is recorded by the second sub-scanning roller pair 37. Immediately before being separated from, the front end is sandwiched by the sixth conveying roller pair 100 and conveyed, and then sent to the second conveying roller pair 32.

FIG. 8 is a block diagram of another example of the optical unit 25,
FIG. 9 is a plan view thereof, and a pair of walls 105 and 106 are provided on both sides of the exit window 79 in the subunit 62 in parallel with each other up to a position before the toric lens 82, and on the walls 105 and 106. A plate-shaped support member 107 is attached to the. The reflection mirror 10 is provided on the support member 107 in the direction parallel to the scanning light from the toric lens 82 side.
8, lenses 109 and 110 of the second imaging optical system, and a reflection mirror 111 are sequentially provided, and the reflection mirrors 108 and 111 are provided.
Are inclined to face each other.

Further, a pair of parallel shafts 112, 113 supported by the walls 105, 106 in a direction orthogonal to each other and penetrating one side wall 62b of the subunit 62 are provided, and the base 6 is provided.
One end protruding into 0 is the coupling 114, 1
The solenoids 116 and 117 of the rotary type are connected via 15. Reflection mirrors 118 and 119 are attached to the parallel shafts 112 and 113, respectively.
By the rotation of 6, 117, the reflection mirrors 118, 119 are
In FIG. 8, it moves to the position of the solid line that forms a straight line and the position of the chain line that inclines diagonally opposite to each other. Then, at the position of the chain line, the reflection mirror 11
8 and 119 are openings 107 provided in the support member 107.
a and 107b through reflection mirrors 108 and 1 respectively.
11 and the reflecting surface are made to face each other.

In the thus constructed apparatus, when the reflection mirrors 118 and 119 are at the positions shown by the solid lines in FIG. 8, the light beam reflected by the rotary polygon mirror 65 goes straight through the emission windows 79 and 80. The surface of the film S is scanned through. Further, when the reflection mirrors 118 and 119 are located at the chain line position, the light beam is reflected by the reflection mirrors 119 and 108 and is narrowed down by the lenses 109 and 110.
The surface of the film S is scanned by being reflected by 1, 118. At this time, the light beam passes through the second imaging optical system and is scanned with a spot diameter smaller than that in the above case.

If the spot diameter of the light beam for recording or reading is small, recording or reading can be performed accurately, but if the time per dot is the same, the time required for recording or reading becomes long. In this example, the spot diameter can be changed by driving the reflection mirrors 118 and 119 as needed.

FIG. 10 is a block diagram of still another example of the optical unit 25. The spherical lens 81, the toric lens 82, and the reflection mirror 83 of the image forming optical system are arranged on the base 60 other than the subunit 62. ing. Therefore, the subunit 62 is formed to be smaller, and the subunit 6
The cost can be reduced and the strength can be increased.

FIG. 11 is a block diagram of still another example of the optical unit 25. After reflecting the light beam from the semiconductor laser light source 66 and refracting it at a substantially right angle, it is passed through the cylindrical lens 72 to the rotary polygon mirror 65. A reflection mirror 120 is provided in the subunit 62 so as to irradiate, and between the laser unit barrel 68 and the reflection mirror 120,
A lens barrel 123 that holds the optical systems 121 and 122 is provided. Further, between the reflection mirror 120 and the cylindrical lens 72, an acousto-optic element 124 is provided on the reflection mirror 120 side, and a lens barrel 127 holding the optical systems 125 and 126 is provided on the cylindrical lens 72 side. The acousto-optic element 124 is mounted on the base 60.
The control circuit 128 is provided.

The optical unit 25 converts the light beam from the semiconductor laser light source 66 into an appropriate beam diameter by the optical systems 121 and 122 and makes it enter the acousto-optic element 124, and the control circuit 128 controls the acousto-optic element 124. Modulate the intensity of the light beam. This light beam is used by the optical system 1
25, 126 to convert to a more suitable beam diameter,
The light is incident on the cylindrical lens 72, and the use of the acoustooptic element 124 enables modulation with a wide dynamic range.

[0059]

As described above, the information recording or reproducing apparatus according to the first invention is generated by the driving means for moving the optical element of the optical unit and the control circuit for controlling the driving means when recording or reproducing. Since the generated heat is generated outside the subunit, it is possible to prevent deterioration of the optical performance of the subunit due to the generated heat.

In the information recording or reproducing apparatus according to the second aspect of the present invention, at the time of maintenance of the optical unit or the like, the base attached to the opposing frame member in a bridging manner is integrally attached to and detached from the sub unit, Since the optical unit can be attached and detached without removing the parts, the assemblability and maintainability are improved.

In the information recording or reproducing apparatus according to the third aspect of the invention, the base and the subunit can be integrally attached / detached from the same direction as the magazine attaching / detaching direction when the optical unit is maintained. , Easier to put on and take off, and the assemblability and maintainability are greatly improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment.

FIG. 2 is an external perspective view.

FIG. 3 is a cross-sectional view of a recording unit.

FIG. 4 is a configuration diagram of an optical unit.

FIG. 5 is a sectional view of an optical unit.

FIG. 6 is a configuration diagram of a second embodiment.

FIG. 7 is a sectional view of an optical unit.

FIG. 8 is a configuration diagram of another example of the optical unit.

FIG. 9 is a partial plan view thereof.

FIG. 10 is a configuration diagram of still another example of the optical unit.

FIG. 11 is a configuration diagram of still another example of the optical unit.

FIG. 12 is a configuration diagram of a conventional optical unit.

FIG. 13 is a partial perspective view.

[Explanation of symbols]

21 Recording section 22 units 23 Development Department 25 Optical unit 45, 51 frame members 47 screws 60 base 62 subunits 65 rotating polygon mirror 73 pulse motor 77 solenoid 86,87 Printed circuit board 91 lid 124 Acousto-optic element

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A 61-219915 (JP, A) JP-A 7-84202 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G02B 26/10

Claims (10)

(57) [Claims] 1. A subunit comprising a housing in which a light source for irradiating a light beam, an optical element for converting the light beam into a predetermined optical characteristic, and a deflection scanning means for deflecting and scanning the light beam are provided. An optical unit is configured by being integrally attached to a flat plate-shaped base, and drive means for driving the optical element and a control circuit for controlling the drive means are provided on the base outside the subunit. A device for recording or reproducing characteristic information. 2. The information recording or reproducing apparatus according to claim 1, wherein the base is a good conductive member. 3. The information recording or reproducing apparatus according to claim 1, wherein the optical unit has a lid having good conductivity and is electrically shielded from the outside. 4. The subunit is 3 with respect to the base.
The information recording or reproducing apparatus according to claim 1, which is fixed at a position. 5. The information recording or reproducing apparatus according to claim 1, wherein the subunit is a plastic molded product. 6. The information recording or reproducing apparatus according to claim 1, wherein the subunit is substantially sealed from the outside except a light beam emitting window. 7. The information recording or reproducing apparatus according to claim 1, wherein a connector for inputting and outputting an electric signal is simultaneously attached and detached by attaching and detaching the optical unit. 8. A sub-unit comprising a housing in which a light source for irradiating a light beam, an optical element for converting the light beam into a predetermined optical characteristic, and a deflection scanning means for deflecting and scanning the light beam are provided. An optical unit is configured by being integrally attached to a flat plate-shaped base, drive means for driving the optical element and a control circuit for controlling the drive means are provided on the base outside the subunit, and a sheet-like shape is provided. Providing opposing frame members that form the moving path of the recording medium,
An information recording or reproducing apparatus, wherein the optical unit is attached in a state of bridging the facing frame members. 9. A sub-unit comprising a housing in which a light source for irradiating a light beam, an optical element for converting the light beam into a predetermined optical characteristic, and a deflection scanning means for deflecting and scanning the light beam are provided. An optical unit is integrally attached to a flat plate-shaped base, and a drive means for driving the optical element and a control circuit for controlling the drive means are provided on the base outside the subunit, and the optical unit is not used. Of at least one of a sub-line magazine for storing the sheet-shaped recording medium and a received magazine for storing the used sheet-shaped recording medium, and the sub-line magazine or the receive magazine is removable from one side, the optical unit Is an information recording or reproducing apparatus, wherein the magazine can be attached and detached in the same direction as the magazine attaching and detaching direction. 10. The information recording or reproducing apparatus according to claim 9, wherein the optical unit is engaged by engaging means on the inner side with respect to the attaching / detaching direction and fixed by screw fastening means on the front side.