JPH031884Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automobile light bulb device that can be suitably used as an automobile lighting lamp, such as a headlight or a fog lamp.

[Conventional technology]

Conventionally, light bulb devices equipped with halogen light bulbs have been widely used as lighting lights for automobiles. This type of light bulb device generally includes a halogen light bulb and a base for holding the light bulb, and is used by being attached to a reflector installed in an automobile.

However, in automotive lighting, it is necessary for the filament of the bulb to be in a precisely defined position relative to the reflector in order to obtain a defined light distribution, and for this reason it is usually By providing a positioning protrusion on the part and using this protrusion as a stopper, the base can always be attached to the reflector in a prescribed position. Therefore, in such a light bulb device, it is necessary to fix the light bulb to the base so that the distance LCL between the filament of the light bulb and the flange of the base is a specified distance. It is required that the allowable displacement width of distance LCL be within ±0.5mm.

[Problem that the invention attempts to solve]

However, in conventional light bulb devices, the task of assembling the light bulb and the base is often difficult and time-consuming, and there are problems in that the assembly accuracy is low.

[Purpose of invention]

The present invention was developed based on the above-mentioned circumstances, and its purpose is to be able to assemble a light bulb and a base with high dimensional accuracy with a simple structure, and to ensure that the light bulb and base can be assembled with high dimensional accuracy when attached to an automobile reflector. An object of the present invention is to provide a light bulb device for an automobile that can obtain a light distribution specified in the above.

[Means and actions for solving problems]

The automotive light bulb device of the present invention comprises an automotive light bulb having one end connected to a filament and the other end extending from the enclosure to the outside through an end sealing part in an airtight manner, and an end portion of the light bulb. A cylindrical metal sealing part holder that holds the sealing part under pressure when it is inserted into the cylinder through an opening at one end, and a peripheral part that is fixed to the opening at the other end of this sealing part holder and engages with it. A cylindrical plastic base that holds the plate in a cylinder and has a positioning ridge on the outer periphery of the cylinder. a guide portion that extends and abuts against the engaging portion of the plate to guide the plate into the cylinder; and a plate stopper provided at the base end of the guide portion that abuts one surface of the plate; The plate is inserted so that its engaging portion abuts against the guide portion of the base and abuts against the plate stopper of the base, and the plate abuts against the guide portion so as to abut the other surface of the plate. It is characterized in that it is held and fixed by a plastic plate holding member that is adhesively fixed to the base.

According to this structure, since the base is made of plastic, it is easy to form and can easily be formed with high shape precision. By fixing the light bulb in contact with the stopper provided inside, it is possible to assemble the light bulb and the base with high dimensional accuracy despite the simple structure.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1A, 1B, and 1C are diagrams showing one embodiment of the present invention, in which 1 is a twin-filament automobile light bulb made of, for example, a halogen bulb, 2 is a rectangular cylindrical metal sealing part holder, 3 is a metal plate and 4 is a plastic base.

In the light bulb 1, 10 is a glass enclosure, 11 is a flat end seal, 12 and 13 are filaments,
14A, 14B and 15A, 15B are leads;
15B are connected to both ends of the filaments 12 and 13 within the envelope 10, and the other end is connected to the envelope 1.
The end sealing portion 11 is hermetically penetrated from inside the end portion 11 to protrude and extend to the outside.

In the sealing part holder 2, 21A, 21B, 21C, and 21D are sealing part holding claws provided on one and the other of a pair of opposing wide side walls, respectively. These sealing portion holding claws 21A, 21 are formed by providing a U-shaped cut groove and bending that portion into the cylinder.
B, 21C, and 21D pinch the flat parts 111A and 111B of the end sealing part 11 of the light bulb 1 inserted into the cylinder of the sealing part holder 2 from the opening 22 at one end, thereby sealing the light bulb 1. It is held in a section holder 2. 23A and 23B are joint pieces, and these joint pieces 23A and 23B are provided so as to extend from the other end opening 24 along the opening surface, respectively.

The metal plate 3 has engaging parts 31A and 31B formed by partially cutting out the peripheral edge thereof, and the joint pieces 23A and 31B of the sealing part holder 2 are arranged so that the light bulb 1 extends upright on the plate 3. 23B is connected and fixed on one surface 32 of the plate 3 by spot welding or the like. A lead insertion hole 33 is provided in a portion of the plate 3 facing the other end opening 24 of the sealing portion holder 2, and the leads 14A, 14B of the light bulb 1 are passed through the lead insertion hole 33.
and 15A, 15B are drawn out.

The plastic base 4 has a cylindrical shape with one end open and the other end closed, and the cylindrical wall 41 has a ring-shaped ring extending outwardly along the same plane perpendicular to the axis of the cylindrical wall 41. A positioning protrusion 42 is integrally provided. Inside the base 4,
43A and 43B are convex guide portions extending in the direction of the cylinder axis of the base 4, and 44 is a ring-shaped plate locking portion provided at the base end portions of the guide portions 43A and 43B. The plate 3 is fitted from the opening at one end of the base 4 until the other surface 34 comes into contact with the plate locking part 44 while the engaging parts 31A and 31B respectively engage the guide parts 43A and 43B in the base 4. . Reference numeral 5 designates a ring-shaped plastic plate holding member, and a pair of recesses 51A and 51B are provided at the peripheral edge of this holding member 5 to engage with guide portions 43A and 43B, respectively. The recessed portions 51A and 51B are respectively guided by the guide portion 43.
The presser member 5 is fitted into the base 4 so that one end thereof comes into contact with one surface 32 of the plate 3 while being engaged with A, 43B, and the presser member 5 is fixed to the base 4 by adhesive or ultrasonic bonding.

Reference numerals 61, 62, and 63 designate terminal boards, and one end of each of these terminal boards 61, 62, and 63 is buried and fixed in the bottom portion 46 of the base 4, and the other end extends outwardly. Leads 14A and 15A of the light bulb 1 are connected to terminal plates 61 and 62 via lead wires, respectively, and leads 14B and 15B are both connected to a terminal plate 63 for grounding.

According to the above embodiment, the end sealing portion 1 of the light bulb 1
A plate 3 is fixed to the opening at the other end of the sealing part holder 2 which holds the sealing part holder 1 under pressure, and when the plate 3 is in contact with the plate locking part 44 in the base 4 made of plastic, the holding member 5, the plate 3 is always held in the same position in the base 4, so that when the bulb 1 is clamped in the sealing part holder 2, the distance between the plate 3 and the filaments 12, 13 is By keeping it constant, when the plate 3 is fixed to the base 4, the distance LCL between the positioning ridge 42 of the base 4 and the filaments 12, 13 will match the specified distance with high accuracy, Therefore, the base 4 having the plate 3 and the plate locking part 44
In addition, the light bulb 1 and the base 4 can be assembled with high dimensional accuracy with a simple configuration provided with the holding member 5, and as a result, it is possible to reliably obtain a specified light distribution when mounted on a reflector of an automobile. can.

[Effect of idea]

As explained in detail above, the present invention provides an automotive light bulb having a lead connected to a filament at one end and a lead extending from the enclosure to the outside through an end sealing part at the other end, and this light bulb. A cylindrical metal sealing part holder that holds the end sealing part under pressure while inserted into the cylinder from one end opening, and a peripheral edge part fixed to the other end opening of this sealing part holder. It comprises a metal plate having an engaging portion at the cylindrical surface, and a cylindrical plastic base that holds the plate in a cylinder and has a positioning ridge on the outer periphery of the cylinder. It has a guide part that extends along the axis and guides the plate into the cylinder by abutting against the engaging part of the plate, and a plate stopper that comes into contact with one surface of the plate provided at the base end of the guide part. The plate is inserted so that its engaging portion abuts against the guide portion of the base and abuts against the plate stopper of the base, and the plate is inserted so as to abut against the guide portion so as to abut against the other surface of the plate. This automotive light bulb is characterized in that the light bulb is held and fixed by a plastic plate holding member adhesively fixed to the base in the assembled state, so the light bulb and the base can be held together with high dimensional accuracy with a simple structure. It is possible to provide an automobile light bulb device that can be assembled and that can reliably obtain a prescribed light distribution when mounted on a reflector of an automobile.

[Brief explanation of drawings]

FIGS. 1A, 1B, and 1C are an explanatory vertical front view, an explanatory longitudinal side view, and an explanatory cross-sectional plan view, respectively, showing one embodiment. 1... Car light bulb, 2... Sealing part holder,
3...Metal plate, 4...Plastic base, 11...End sealing part, 14A, 14B, 1
5A, 15B...Lead, 21A, 21B, 21
C, 21D... Sealing part presser claw, 23A, 23B...
...Joint piece, 31A, 31B...Engagement part, 33...
Lead insertion hole, 41... Cylinder wall, 42... Positioning edge, 43A, 43B... Guide portion, 44... Plate locking portion, 5... Pressing member, 61, 62, 6
3...Terminal board.

Claims (1)

[Claim for Utility Model Registration] An automotive light bulb having one end connected to a filament and the other end extending from the enclosure to the outside through an end sealing part in an airtight manner, and an end of this light bulb. A cylindrical metal sealing part holder that holds the sealing part under pressure when it is inserted into the cylinder through an opening at one end, and a peripheral part that is fixed to the opening at the other end of this sealing part holder and engages with it. A cylindrical plastic base that holds the plate in a cylinder and has a positioning protrusion on the outer periphery of the cylinder, the base having an inner wall along the cylinder axis. a guide portion that extends and abuts against an engaging portion of the plate to guide the plate into the cylinder; and a plate stopper provided at the base end of the guide portion that abuts one surface of the plate; is inserted so that its engaging part abuts against the guide part of the base and abuts against the plate stopper of the base, and also abuts against the guide part so as to abut the other surface of the plate. A light bulb device for an automobile, characterized in that it is held and fixed by a plastic plate holding member adhesively fixed to the base.