JPH0220789Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a bulb socket device used in an automobile lamp. Attach the valve to the valve insertion opening, bend the contact part of the flexible printed circuit board on the opposite side of the valve insertion opening, and press the conductive part formed on the contact part to the terminal of the valve with a pressure spring. This invention relates to an improvement of a valve socket device.

<Prior art> In this type of valve socket device, the flexible printed circuit board itself has rigidity, so even if the contact part is pressed from behind with a pressing spring, the conductive part formed on the contact part can reliably contact the terminal of the valve. There are things I don't do. In particular, unlike the positive terminal, the bulb's ground terminal does not protrude backwards (towards the contact area of the flexible printed circuit board), so this tendency is even stronger, resulting in problems with poor electrical contact reliability.

Therefore, it has been proposed to electrically connect the grounding conductive part of the flexible printed circuit board and the grounding terminal of the bulb using a grounding contact, but in this case, the grounding contact itself usually does not have elasticity. As a result, the grounding contact must be made of an expensive phosphor bronze material, resulting in a problem that increases costs.

<Problems to be solved by the invention> The present invention has been made in view of the above-mentioned problems in the past, and it is possible to connect the earthing terminal of the valve to the flexible printed circuit board without having to make the earthing contact itself particularly elastic. It is an object of the present invention to provide a valve socket device which can make reliable electrical contact with a ground conductive part of the valve socket and improve the reliability of electrical connection.

<Means for Solving the Problems> The valve socket device of the present invention which achieves the above purpose has the following features: A valve insertion tube is formed in the socket body in a horizontal direction, and a bubble is attached to the valve insertion opening of the valve insertion tube. In a valve socket device in which a contact portion of a flexible printed circuit board is bent up on the side opposite to the valve insertion opening, and a conductive portion formed on the contact portion is pressed into contact with a terminal of the valve using a pressure spring, a ground contact is used. is formed into a substantially U-shape consisting of an upper contact portion, a middle contact portion, and a lower contact portion, and the upper contact portion of the grounding contact is curved into a substantially C-shape, and the lower contact portion of the grounding contact is formed into a substantially C-shape. It is attached to the socket body, the upper contact part faces the inside opposite to the valve insertion opening, and is pressed into contact with the grounding terminal of the bulb, and the flexible print is attached to the middle contact part of the grounding contact. The present invention is characterized in that the grounding conductive portion of the board is pressed into contact with the pressing spring.

<Example> Hereinafter, an example of implementing the present invention will be described based on the drawings.

The socket main body A includes a cylindrical valve insertion tube 1 having a sideways opening for the valve insertion opening 1a, a strut portion 2 that supports it, and a side of the valve insertion tube 1 opposite to the valve insertion opening 1a. and a pressure spring attachment part 3 formed rearward of the support column 2, and each of these constituent members is molded into one body from a synthetic resin material. And, in the valve insertion tube 1,
A slot 4 is formed to serve as a valve insertion opening 1a,
The valve B is installed horizontally into the valve insertion opening 1a.

Further, the support portion 2 is formed into a substantially U-shape in plan with the support walls 2a, 2a on both sides and the rear support wall 2b. A protrusion 8 is provided to protrude and engage with the engagement hole 7 of the formed socket mounting portion 6, and
At the rear of both side support walls 2a, 2a (on the side opposite to the valve insertion opening 1a of the valve insertion tube 1), a pressure spring mounting portion 3 is installed so as to be located further back than the rear support wall 2b. Form an integral extension. Then, one ground conductive part 9a and two positive conductive parts 9b, 9b formed in the contact part F' of the flexible printed circuit board F are connected to the pressing spring mounting part 3 to the ground terminal 5a and the positive terminal of the valve B, respectively. 5b
Attach the pressure spring C to press the Furthermore, a grounding contact D for electrically connecting the grounding terminal 5a of the bulb B and the grounding conductive portion 9a of the flexible printed circuit board F is attached to the rear support wall 2b of the supporting column 2.

The ground contact D is formed by bending an elongated conductive metal plate into a substantially U-shape consisting of an upper contact portion _D1 , a middle contact _D2 , and a lower contact portion _D3 , and the lower contact portion _D3 is formed into a socket. The valve insertion opening 1a of the socket body A is formed by inserting and engaging the rectangular engagement hole 16 formed in the rear support wall 2b of the main body A, and by forming the upper contact portion _D1 into a substantially C-shaped curve. Facing the interior on the other side. Then, the upper contact portion D ₁ is pressure-contacted to the grounding terminal 5a of the bulb B so as to elastically contact it, and the grounding conductive portion 9a of the flexible printed circuit board F is pressed to the middle contact portion D ₂ using a pressing spring C to elastically contact the grounding terminal 5a of the bulb B. Make sure that they are pressed together.

The socket mounting portion 6 of the lamp wall E to which the socket body A is attached is constructed by facing each other with rising walls 6a that are substantially U-shaped in plan, and the contact portion of the flexible printed circuit board F is placed between the two rising walls 6a, 6a.
At the same time, when the socket body A is installed in the socket mounting part 6, the contact part F' of the flexible printed circuit board F cooperates with the rear support wall 2b of the support part 2 formed on the socket body A. A protrusion 10 is formed in a horizontally extending manner to bend and raise the material almost vertically.

Contact part of flexible printed circuit board F
One ground conductive part 9a and two positive conductive parts 9b, 9b are formed in F', and the socket body A
Bend vertically from the bottom surface of the valve B toward the side opposite to the valve insertion opening 1a, and hold each conductive part 9a, 9b with a pressing spring C to connect the earth and positive terminal 5 of the valve B.
a and 5b, respectively. That is, in the contact portion F' of the flexible printed circuit board F, two positive conductive parts 9b, 9b are arranged in parallel on the left and right, and one ground conductive part is formed between these two positive conductive parts 9b, 9b. The contact portion F' is formed so as to be located slightly below the positive conductive portions 9b and 9b, and this contact portion F' is projected onto the rear support wall 2b of the socket body A and the socket mounting portion 6 of the lamp wall E. The protrusion 10 provided is bent and raised almost vertically from the bottom surface of the socket body A.
Press the spring C attached to the spring mounting part 3 of the socket body A elastically from behind to connect the grounding conductive part 9a to the grounding contact D.
While pressing the middle contact part D ₂ of the
The two positive conductive parts 9b, 9b are brought into pressure contact with the two positive terminals 5b, 5b of the bulb B, respectively. In addition, on both sides of the grounding conductive part 9a,
By forming the elongated hole 17 as in the illustrated embodiment, it is possible to impart flexibility to the contact portion F', and as a result, the pressing force of the pressing spring C acts more easily on the grounding conductive portion 9a, making it more This makes it easier for the grounding conductive part 9a to come into pressure contact with the middle contact part _D2 more reliably.

The pressing spring C is made of a single elastic metal plate and is curved into a substantially U-shape, with one rising wall serving as a pressing portion Ca that presses the contact portion F′ of the flexible printed circuit board F, and the other The rising wall portion is defined as a support portion Cb that is engaged with the pressing spring attachment portion 3 of the socket body A. Cuts 11a, 11b, 11c are formed from the upper end of the pressing part Ca, and two positive conductive parts 9b, 9 formed in the contact part F' of the flexible printed circuit board F are formed.
In correspondence with b, two positive side pressing pieces 12,
12 are formed in parallel so that they can be pressed independently of each other, and these two positive side pressing pieces 1
2 and 12, and one ground side pressing piece 13 is formed so as to correspond to the grounding conductive part 9a of the contact portion F'. The positive side pressing piece 12 is composed of a spring part 12a and a pressing part 12b,
In addition, in order to increase the pressing area, the width of the pressing part 12b is made wider than that of the spring part 12a, and a small guide protrusion 12c is formed extending from the lower end of the pressing part 12b that protrudes from the spring part 12a. When attaching to the press spring attachment part 3 of the socket body A, the press part 12 protrudes beyond the spring part 12a.
To prevent damage to the contact part F' of the flexible printed circuit board F even at the lower end of the flexible printed circuit board F. Then, the ground side pressing piece 13 is bent back toward the front so that the grounding conductive portion 9a of the flexible printed circuit board F is elastically pressed against the middle contact portion _D2 of the grounding contact D.

Further, the upper end of the other rising wall Cb is bent approximately 90 degrees rearward to form an engaging portion 14, and
A mounting portion 15 is formed to be inserted into and engaged with an engagement groove 3a formed in the pressing spring mounting portion 3 of the socket body A.

Next, to explain the assembly procedure with the above configuration, first, insert and engage the lower contact part _D3 of the grounding contact D into the pillar part 2 (rear pillar wall 2b) of the socket main body A, and then connect the grounding contact D
is attached to the socket body A, and its upper contact portion _D1 faces the interior on the opposite side from the valve insertion opening 1a. On the other hand, the contact portion F' of the flexible printed circuit board F is provided in the socket attachment portion 6 of the lamp wall E, and the socket body A is attached to the socket attachment portion 6 from above. Then, the contact part F' of the flexible printed circuit board F is located opposite to the valve insertion opening 1a due to the action of the support part 2 (rear support wall 2b) of the socket body A and the protrusion 10 of the socket mounting part 6. Since it is bent almost vertically to the side, when the pressure spring C is inserted from above into the pressure spring attachment part 3 of the socket body A, one grounding conductive part formed on the contact part F' of the flexible printed circuit board F is inserted. 9a and two positive conductive parts 9
b, 9b are the ground side pressing pieces 13 of the pressing spring C.
Even with the elastic pressing force of the positive side pressing piece 12,
Each is pressed toward the socket body A, and the grounding conductive portion 9a is pressed against the middle contact portion _D2 of the grounding contact D (see FIG. 2). After that,
When the bulb B is installed in the valve insertion slot 1a, the grounding terminal 5a of the bulb B connects to the grounding contact D.
_{, and pushes the upper contact portion D 1 back} toward the pressing spring C against the pressing force of the ground side pressing piece 13 of the pressing spring C. As a result, together with the pressing force of the grounding side pressing piece 13 of the pressing spring C, the middle contact portion _D2 is elastically pressed against the grounding conductive portion 9a of the flexible printed circuit board F, and the positive terminal of the valve B terminal 5
b, 5b, the positive conductive parts 9b, 9b of the flexible printed circuit board F are elastically pressed by the pressing force of the positive side pressing piece 12 of the pressing spring C (see FIG. 1).

Incidentally, FIG. 5 shows another embodiment of the present invention, in which the structure of the socket mounting portion 6 that supports the socket body A is different from the previous embodiment. That is, the socket mounting portion 6 of this embodiment is attached to the front end 18 of the side wall 2a of the socket body A.
It is composed of a substantially gate-shaped engaging portion 19 that engages the socket body A, and a substantially gate-shaped hooking portion 21 that engages a protrusion 20 formed protruding from the side wall 2a of the socket body A. The openings 19a and 21a of the locking part 21 are formed in directions perpendicular to each other, and the opening edge of the locking part 21 has a shape that allows the socket body A to be engaged when the socket body A is installed in the socket mounting part 6. The inclined surface part 22 serves to guide and press the part 19.
are integrally formed in a protruding manner. By configuring the socket mounting portion 6 in this manner, the socket main body A can be securely mounted on the socket mounting portion 6 without wobbling.

<Effects of the invention> Since the valve socket device of the present invention is constructed in this way, when the valve is installed in the valve insertion slot, the grounding terminal of the bulb comes into contact with the upper contact part of the earthing contact, and the upper contact part It is pushed back toward the pressing spring against the pressing force of the pressing spring, and the middle contact part is brought into elastic pressure contact with the grounding conductive part of the flexible printed circuit board, so that the grounding contact itself has exceptional elasticity. Even if it is not, the electrical connection between the grounding terminal of the valve and the grounding conductive part of the flexible printed circuit board becomes more reliable due to the pressing force of the pressing spring, and the reliability of the electrical connection can be improved. I can do it.

Moreover, since the grounding contact itself does not have to be elastic, it can be made of inexpensive brass material instead of the expensive phosphor bronze material used in conventional products.
Cost reduction can be achieved.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention; Fig. 1 is a sectional view with a valve installed, Fig. 2 is a sectional view before the valve is installed, Fig. 3 is an exploded perspective view, and Fig. 4 is a socket body. FIG. 5 is an exploded perspective view showing the relationship between the ground contact and the ground contact from the rear side, and FIG. 5 is an exploded perspective view showing another embodiment of the present invention. In the figure, A is the socket body, B is the valve, C is the pressure spring, D is the ground contact, _D1 is the upper contact part, _D2 is the middle contact part, _D3 is the lower contact part, F is the flexible printed circuit board,
F' is a contact part, 1 is a valve insertion tube, 1a is a valve insertion hole, 2 is a support part, 3 is a pressure spring mounting part,
5a is the ground terminal, 5b is the positive terminal, 9a
9b is a conductive part for ground, and 9b is a conductive part for positive.

Claims (1)

[Scope of utility model registration request] A valve insertion tube is formed horizontally in the socket body, a valve is installed in the valve insertion opening of the valve insertion tube, and the contact portion of the flexible printed circuit board is bent up on the opposite side from the valve insertion opening. In a valve socket device in which a conductive part formed on a contact part is pressed into contact with a terminal of the valve by a pressing spring, the grounding contact is formed in a substantially U-shape consisting of an upper contact part, a middle contact part, and a lower contact part. At the same time, the upper contact part of the grounding contact is curved into a substantially C-shape, the lower contact part of the grounding contact is attached to the socket body, and the upper contact part is inserted into the inside opposite to the valve insertion opening. The conductive part of the flexible printed circuit board is brought into pressure contact with the middle contact part of the grounding contact by the pressing spring. Valve socket device.