JPH02133255A - Wiring method for vehicle lighting fixture - Google Patents

Abstract

PURPOSE:To eliminate generation of a wiring mistake further enabling automatization to be attained by putting a wiring foil film between two or more metal molds for injection molding synthetic resin injection molding a synthetic resin- made member and securing a metal layer to the synthetic resin made member. CONSTITUTION:A wiring foil film 81 of long scale is linked extending between a female metal mold 82 and a male metal mold 83, and a moving base 84, supporting the metal mold 83, is advanced holding the wiring foil film 81 performing die matching. Next advancing an injector 85, a synthetic resin-made member, for instance, lamp housing 1 performs injection molding by a synthetic resin material, next when the mold is released, a metal wiring layer 81f, formed on a base film 81a of the wiring foil film 81 through a mold releasing layer 81b, is exfoliated from the base film 81a and secured to the resin-made member 1. Here position alignment of the wiring layer 81f to the metal molds 82, 83 is performed with detection by a photo sensor 87. Thus eliminating the necessity for wiring base board storage space in the synthetic resin-made member, no after work is required further enabling miswiring to be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicular lamp, and more specifically, an electric circuit pattern is integrally formed on a resin member such as a housing, a cover, or a case. This relates to a method of wiring a light fixture.

[Conventional technology]

BACKGROUND OF THE INVENTION Conventional vehicle lamps (for example, interior lights) include those that use a cord for the electric circuit as shown in FIG. 5, and those that use a wiring plate for the electric circuit as shown in FIG.

In FIGS. 5 and 6, reference numeral 1 denotes a housing as an insulating resin member, and the housing 1 of this conventional example has a rectangular thin plate shape. rONJ is provided on the surface of the recess 100.
, rOFFJ, rDOORJ are attached. On the other hand, an opening 11 is provided at a location near the other end of the housing 1,
An engaging claw 1 extends from the center of the housing 1 to the other end.
Provide three pieces of 2.

Reference numeral 2 denotes a lens, and this lens 2 has a rectangular thin plate shape and is removably engaged with the engaging claw 12 of the housing 1.

A pair of valve holders 3 have spring properties and conductivity, and these two valve holders 3 are respectively attached to opposing edges of the opening II of the housing 1. A valve 30 is attached to the two valve holders 3. Attach removably.

Reference numeral 4 denotes a switch lever made of an insulating material, and the switch lever 4 is rotatably attached to a location near the recess 10 in the center of the housing 1 with a rivet 40, and one end of the switch lever 4 is attached to the housing 1. recess 1
0 side, and the other end of the switch lever 4 is located on the center side of the housing 1. A conductive ball 41 is attached to the other end of the switch lever 4 so as to be freely transferable.

51, 52, 53, and 54 are conductive 1st. Second. 3rd゜Fourth switch contacts, these four contacts 51, 52, 53, 54 are placed approximately in the center of the housing 1, and are equally spaced on the circular locus of the other end of the switch lever 4 for the switch. It is attached so as to make elastic contact with the ball 41 of the lever 4.

In FIG. 5, 61 and 62 are 1st. A second cord connects both ends of the first cord 61 to the second contact 52 and the one valve holder 3, respectively. On the other hand, one end of the second cord 62 is connected to the first contact 51, and the other end of the second cord 62 is connected to the terminal 60. Reference numeral 63 denotes a conductive connection plate that connects the second contact 52 and the third contact 53.

On the other hand, in FIG. 6, reference numerals 71 and 72 denote first and second wiring plates, and both ends of the first wiring plate 71 are connected to the second and second wiring plates. The third contacts 52 and 53 are connected to one valve holder 3, respectively. On the other hand, one end of the second wiring plate 72 is connected to the first contact 51.

In FIGS. 5 and 6 described above, the first contact 51 is connected to a power source, and the fourth contact 54 is connected to an electric circuit that is opened and closed by opening and closing a door (not shown).

Thus, when the switch lever 4 is positioned at the position shown, the ball 41 is moved to the second position. The third contacts 52 and 53 are contacted, the electric circuit is open, and the bulb 30 is turned off.

Next, when the switch lever 4 is rotated counterclockwise from the illustrated position, the ball 41 is moved to the first position. Second contact 51
．． 52, the electric circuit is closed, and the valve 30
lights up.

Further, when the switch lever 4 is rotated clockwise from the illustrated position, the ball 41 is moved to the third position. Fourth contact 53.
54 and is connected to the above-mentioned electric circuit, and when the door is opened and closed, the above-mentioned electric circuit is opened and closed, and the bulb 30 is turned off and turned on.

[Problem to be solved by the invention]

However, the above-mentioned conventional vehicle lamp includes a housing 1 as a synthetic resin member and a cord 6 constituting an electric circuit.
1.62 or the wiring plate 71.72, respectively, and in the assembly process, the code 6 is attached to the housing 1.
1.62 or the wiring plate 71.72, the two assemblies are complicated, automatic assembly is difficult, and there is a risk of wiring errors.

A wiring board that is manufactured separately from the synthetic resin components and electrical circuits in order to construct a vehicle light that is easy to assemble, easy to automate, and eliminates wiring errors. A method (hereinafter referred to as a "proposal") of attaching the material to the synthetic resin member is also conceivable.

FIG. 7(A) is a perspective view of a wiring board 80 according to the above-described draft.

This wiring board 80 includes a conductive pattern 80a having a shape similar to that of the wiring plate of the conventional example (FIG. 6).

80b is provided. The B-B cross section is shown in Figure 7 (B
).

A metal layer 80 in the shape of a conductive pattern is disposed on the substrate body 80c.
d is layered and covered with a protective layer 80e.

A thank-you void 80e-1 is provided in the protective layer 80c, and the metal layer 80d is locally exposed. This exposed portion is used for soldering.

However, the wiring method according to the above proposal requires time and effort to attach the wiring board after injection molding the synthetic resin member (for example, the lamp housing).

A space is required to house the wiring board in the synthetic resin member (for example, a lamp housing), which prevents the synthetic resin member from becoming thinner.

C. There are restrictions on synthetic resin members (for example, lamp housings), such as the need for the wiring board mounting portion to be substantially planar and free of obstacles.

It always comes with some problems.

The present invention has been made in view of the above-mentioned circumstances, and improves the method of the prototype without sacrificing the advantages of the prototype, such as easy automation and no risk of wiring mistakes, and wires wires inside synthetic resin members. There is no need to create a space to store the board, and the wiring is formed at the same time as the injection molding of the synthetic resin member.
The purpose of the present invention is to provide a wiring method for vehicle lights that does not require any processing steps after injection molding.

[Means to solve the problem]

The basic principle of the wiring method of the present invention created to achieve the above object is to construct a multilayer foil film containing a thin layer of metal in the shape of a conductive pattern, and to place the above foil film between molds. Injection molding of the synthetic resin member is performed by sandwiching the metal parts, and the thin metal layer is fixed to the surface of the molded synthetic resin member.

In order to ensure the above-mentioned adhesion, an adhesive layer is layered on the thin metal layer.The above-mentioned adhesive is made of synthetic resin of the same shape as the synthetic resin member and does not have tackiness at room temperature. is suitable.

[Effect]

According to the above means, since the metal thin layer in the shape of a conductive pattern is in-molded into a synthetic resin member (for example, a lamp housing), wiring is completed at the same time as injection molding, and no processing is required after injection molding.

For the same reason as above, there is no need for space for housing the wiring board in the synthetic resin member (for example, a lamp housing), and this is suitable for making the synthetic resin member thinner.

For the same reason as above, there are no restrictions on the shape of the synthetic resin member near the location where the wiring is to be made.

It is not restricted by nearby obstacles.

〔Example〕

FIG. 1 is a process diagram of an embodiment in which wiring is provided within a lamp housing by applying the method of the present invention.

A long wiring foil film 81 having a structure to be described later with reference to FIGS. 2 and 3 is stretched between a mold (female) 82 and a mold (pheasant) 83 to support the mold (male) 83. Arrow a indicates the moving base 84
The wiring foil film 81 is sandwiched and molded together as shown in FIG. 1(B), and the injector 85 shown in FIG. 1(A) is moved forward as shown by the arrow and the housing 1 ( Figure 1 (B)
) is injection molded.

A plan view of the above wiring foil film 81 is shown in FIG.

Conductive patterns 80a and 80b shown in FIG. 7 (draft)
Conductive patterns 81D+-81DZ having substantially the same shape are arranged (the reason why they are drawn with broken lines is that they are covered with a protective layer etc. as will be described later with reference to FIG. 3).

FIG. 3 is an explanatory diagram schematically depicting a cross section of the wiring foil film 81. As shown in FIG.

81a is a polyester base film.

81b is a release layer made of wax.

81c is a protective layer made of acrylic resin, and the metal layer 81
It covers d. This protective layer 81c has a gap 81 for a thank you note.
cm1 is provided to expose a minute area of the metal layer 81d. This exposed portion is provided for soldering and corresponds to the soldering portion 81H in FIG. 2.

In the state shown in FIG. 2, the void 81 cm1 of the thank you note is filled with a mold release agent (wax), and the soldered portion of the metal layer is exposed when the mold is released.

The metal layer Bid was formed by depositing copper.

Copper is suitable because it has low electrical resistance, is easy to solder, is chemically stable, and has heat resistance.

As shown in FIG. 2, the wiring foil film has a long tape shape, and positioning marks 81M1 and 81M2 are arranged in accordance with the arrangement pitch of the conductive patterns 81D+ and 81Dz.

In the process shown in FIG. 1(A), the photoelectric sensor 87 detects the positioning marks 81M+ and 81M2, and correctly positions the conductive pattern with respect to the mold.

Injection mold the housing 1 as shown in FIG. 1(B),
When the mold is opened and the housing 1 is taken out as shown in FIG. 1, and a wiring layer 81f is formed.

FIG. 4(B) is a cross-sectional view of the vicinity of the wiring layer 81f.

Since the adhesive layer 81e is made of the same synthetic resin as the housing 1, it has good compatibility and is fused, making the boundary unclear.

The thank-you gap 81cmt in the protective layer 81c exposes a minute portion of the metal layer 81d, making soldering possible.

FIG. 4(A) is a perspective view of the injection-molded housing 1. The aforementioned metal layer 81d is fixed to the inner surface of the housing 1 to form conductive patterns 81D, 81D2.

〔Effect of the invention〕

As explained above, according to the wiring method of the present invention, there is no need for a space for storing a wiring board in a synthetic resin member (for example, a lamp housing), and wiring can be performed at the same time as injection molding of the synthetic resin member. Therefore, there is no need for processing after injection molding, and there is no risk of incorrect wiring, which is an excellent practical effect.

[Brief explanation of the drawing]

FIG. 1 is a process diagram showing an embodiment of the wiring method according to the present invention. FIG. 2 is a plan view of the wiring foil film in the above embodiment, and FIG. 3 is a sectional view thereof. FIG. 4 is a diagram for explaining the function and effect of the above embodiment, in which (A) is a perspective view of an injection-molded synthetic resin member, and (B) is a partial sectional view thereof. FIGS. 5 and 6 are perspective views for explaining conventional examples, respectively. FIG. 7 shows a wiring method according to a tentative plan, and FIG. 7(A) is a perspective view of a wiring board, and FIG. 7(B) is a sectional view taken along line B-B. 81... Wiring foil film, 81a... Base film, 8
1b...Release layer, 81c...Protective layer, 81cm1
...Gap in thank you note, 81d...Metal layer, 81e...
Adhesive layer, 82... Mold (female), 83... Mold (male)
, 84... base, 85... injector, 87...
...Photoelectric sensor. Figure 2

Claims (1)

[Claims] 1. In a method of wiring a vehicle lamp by providing a synthetic resin member such as a housing, a cover, a case, and a layer of a conductive member that is integrally arranged on the synthetic resin member to form an electric circuit pattern, A wiring foil film is formed that has a metal layer configured in the shape of a conductive pattern and an adhesive layer, and the wiring foil film is sandwiched between a plurality of molds for injection molding of the synthetic resin member. 1. A method for wiring a vehicle lamp, comprising injection molding a synthetic resin member and fixing the metal layer to the synthetic resin member.