JPH05242938A - Contact device - Google Patents

Abstract

PURPOSE:To surely bring a pair of members opposing to each other into contact with each other without the influence of an obstruction existing between both the members. CONSTITUTION:The device is provided with a bulged part 7A formed between a first member 2A and a second member 9A opposing to each other; and a contact body 18A which is arranged between the first and the second member 2A, 9A to bring the first member 2A into contact with the second member 9A prior to contact between the bulged part 7A and the first and the second member 2A, 9A at the time of contact of the members 2A, 9A with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact device for contacting members arranged to face each other, and is applied to, for example, a connecting structure for connecting an electrode and a terminal, which connecting structure holds a lamp. It is applied to a wedge bulb lamp in which a holder is mounted on a substrate.

[0002]

2. Description of the Related Art A contact device will be described below using a wedge bulb lamp having an electrical connection structure. This wedge bulb lamp is used as a backlight for car radios, clocks, and various instruments arranged on the dash panel of an automobile. As shown in FIGS. 8 and 9, the bulb lamp 12 is mounted on the lamp house 8. Then, the lamp house 8 is connected to a printed board (hereinafter abbreviated as a board) 1 to be mounted inside the dash panel.

In FIG. 8, reference numeral 1 is a double-sided printed circuit board having a circular through hole 1a formed therein. Reference numerals 2 and 3 denote a pair of positive and negative electrodes, which are formed by mounting a copper foil pattern on the peripheral portion of the through hole 1a on the back surface 1c of the substrate 1. These electrodes 2 and 3 are shown in FIG. 9 in order to slide terminals 15 and 16 which will be described later.
As shown in FIG. Further, wiring patterns 4 and 5 for introducing a power supply voltage are connected to the outer peripheral edges of the electrodes 2 and 3, respectively.

Reference numeral 6 denotes a solder plating layer for preventing corrosion of the electrodes 2 and 3, which is formed by immersing the positive and negative electrodes 2 and 3 in a solder bath by a solder dipping method to perform solder plating. Reference numeral 7 denotes a bulging portion caused by drooping solder. A lamp house 8 holds a lamp 12 and includes a base and a socket 10. The base 9 is disc-shaped and has two insertion holes 9a through which the lead wires 13 and 14 are inserted. These insertion holes 9a are formed from the substantial center of the upper surface 9b of the base 9 toward the lower surface 9c of the base 9, further outwardly along the lower surface 9c, and then toward the upper surface 9b.

The socket 10 is formed so that its outer diameter is substantially smaller than the inner diameter of the through hole 1a. Reference numeral 11 denotes an inverted J-shaped holder which is integrally formed on the outer peripheral surface of the socket 10. The holder 11 has a tip portion 11a for holding the substrate 1 in contact with the upper surface 1b of the substrate 1. Although not shown, the socket 10 is provided with a stopper so that when the lamp house 8 is attached to the substrate 1 by rotating it, the lamp house 8 is rotated by 25 degrees from the insertion position. It is regulated.

Reference numeral 12 is an incandescent lamp having a diameter of several millimeters, and lead wires 13 and 14 of the lamp 12 are drawn out from the socket 10. The lead wires 13 and 14 are through holes for the base 9.
It is inserted through 9a and pulled out to the upper surface 9b side of the base 9, and each end is fixed along this upper surface 9b. As a result, as shown in FIG. 9, elongated terminals corresponding to the electrodes 2 and 3 of the substrate 1 are formed.
15, 16 are formed.

Therefore, when the lamp house 8 is attached to the substrate 1, the socket 10 is inserted into the through hole 1a from the back surface 1c side of the substrate 1 shown in FIG. When the tip portion 11a of the holder 11 faces the upper surface 1b of the substrate 1, the terminals 15 and 16 come into contact with the electrodes 2 and 3, respectively. At this time, the chain lines 15A and 16 in FIG.
As shown in A, terminal 1 is attached to each end 2a, 3a of electrodes 2 and 3.
5, 16 are located. Lamp house 8 in this state
When is rotated to the right, the terminals 15 and 16 slide on the electrodes 2 and 3. Then, the other end 2b whose rotation is restricted by the stopper,
At fixed positions on the 3b side (phantom lines 15 and 16 in the figure), the flat positive and negative electrodes 2 and 3 and the elongated terminals 15 and 16 contact and are electrically connected. After that, when a voltage is supplied from the power source to the positive and negative electrodes 2 and 3, the lamp 12 is turned on.

[0008]

By the way, in the above-mentioned conventional wedge bulb lamp, the electrodes 2 of the substrate 1 are placed in the solder bath.
The plating layer is formed by immersing the 3rd side. According to this solder dip method, when the substrate 1 is pulled up from the solder bath,
It is often the case that solder drips or flux adheres to the lower surface of each electrode 2, 3. The dripping of the solder is likely to be concentrated on the edge portion on a flat surface such as the electrodes 2 and 3, and when the solder hardens, it bulges downward from the electrode 2 as shown in FIG. It will be Part 7.

When the bulging portion 7 is formed at the center of the electrode 2, when the tip portion 11a of the holder 11 is brought into contact with the upper surface 1b of the substrate 1 to rotate, the bulging portion having conductivity. Since the terminal 7 on the side of the base 7 and the terminal 15 on the side of the base 9 are in contact with each other, there is no problem of poor electrical connection.

However, when the bulge 7 is formed on the inner peripheral edge side of the electrode 2 as described above, the lamp house 8 is formed in the through hole 1a.
When the tip portion 11a of the holder 11 is slidably contacted with the upper surface 1b of the substrate 1 by inserting the through hole, the tip of the protruding bulging portion 7 is moved to the base 9
It comes into contact with the upper surface 9b of the.

When the lamp house 8 is rotated clockwise as it is, the base 9 side is pressed by the bulging portion 7,
The end side bends. Then, the separation distance between the electrode 2 and the base 9 becomes large, and a gap G is generated between the terminal 15 on the base 9 and the electrode 2 on the substrate 1 to cause non-contact. Therefore, since the electrode 2 and the terminal 15 are not electrically connected to each other, there is a problem in that the lamp 12 does not light up even if the wedge bulb lamp is mounted and then energized during use.

The present invention has been made in order to solve the above problems, and is a contact that can reliably contact both members without being affected by an obstacle existing between a pair of members facing each other. The purpose is to get the device.

[0013]

In the contact device according to the present invention, a bulge portion is formed between the first member and the opposing second member. In addition, between the first and second members,
A contact body is provided for contacting the first member and the second member prior to the contact between the bulging portion and the member when the first member and the second member are in contact with each other.

[0014]

According to the present invention, when the first member and the second member facing each other are brought into contact with each other, the contact body provided between the two members blocks the contact between the bulging portion and the member, Prior to the above contact, the first member and the second member are brought into contact with each other.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a contact device according to the present invention.

In FIG. 1, 2A is a flat plate-shaped first member,
Reference numeral 9A is a flat plate-shaped second member which is arranged so as to face the first member 2A. 7A is the above-mentioned first member 2A and second member 9A
And a bulge portion 15A formed between the first member 2A and the second member 9A and projecting from the first member 2A to the second member 9A side are integrally formed with the second member 9A. It is the second contact body that projects to the side. 18A is the first facing the second contact body 15A.
Is a first contact body provided on the member 2A.

The tips of the first contact body 18A and the second contact body 15A are contact portions 18aA and 15aA, respectively.
When the first member 2A and the second member 9A are brought into contact with each other, they come into contact with each other. The first contact body 18A is the second contact body 15A.
When the two members 2A and 9A come into contact with each other through A, the thickness is set so as to block the contact failure caused by the bulging portion 7A.

That is, when the first contact body 18A is not provided, the first member 2A and the second member 9A are used.
When and are arranged in parallel, if the length b of the bulging portion 7A is larger than the length al of the second contact body 15A, then both members 2A,
When 9A is moved in parallel and brought into contact with the second member 9A, the tip of the bulging portion 7A comes into contact with the second member 9A first, so that the second contact body 15A and the first member 2A are not in contact with each other. The first contact body 18A
Is formed in order to avoid this non-contact, and is the total length a obtained by adding the length a2 to the length al of the second contact body 15A.
A value (a + a2) larger than the length b of the bulging portion 7A (a
> B). This allows both members
At the time of contact between 2A and 9A, the tip of the bulging portion 7A is the second contact member 15
Since the contact portion 18aA and the contact portion 15aA come into contact with each other before coming into contact with A, the contact between the two members 2A and 9A is ensured via the first and second contact bodies 18A and 15A.

FIG. 2 is a side view showing another embodiment of the contact device. In FIG. 2, reference numeral 2B is a curved first member, and 9B is a curved second member arranged so as to face the first member 2B. The first member 2B and the second member 9B have contact portions 2aB and 9aB at their tops, respectively, and
When B and the second member 9B are brought into contact with each other, they come into contact with each other. 7B is a bulging portion projecting from the first member 2B to the second member 9B side, and 18B is integrally formed with the second member 9B so as to project from the second member 9B to the first member 2B side. It is the first contact body. The first contact body 18B is set to a thickness that does not cause contact failure due to the bulging portion 7B when the two members 2B and 9B are in contact with each other, as in the above embodiment.

That is, a center line C passing through the contact portions 2aB, 9aB
Assuming that, on this center line C, at the position retracted from each contact portion 2aB, 9aB to the side of each member 2B, 9B by the same length al,
A pair of reference lines V1 and V2 that are orthogonal to the center line C are set. Here, if the length b of the bulging portion 7B along the center line is larger than the length al on the member side, when the two members 2B and 9B are translated and brought into contact with each other, the bulging portion 7B The tip of the first member comes into contact with the second member 9B side first, so that the first member 2B and the second member 9B do not come into contact with each other.

The first contact body 18B is formed to avoid this non-contact, and when the length of the portion of the first member 2B protruding from the contact portion 2aB is a2, The protruding portion having a size larger than the length a2 is a contact portion of the second member 9B.
It is provided on the 9aB side and is set so that the total length a (al + a3) including the first contact body 18B is larger than the total length b (al + a2) including the bulging portion 7B (a> b). As a result, when the two members 2B and 9B are in contact with each other, the contact portion 18aB and the contact portion 2aB come into contact with each other before the tip of the bulging portion 7B comes into contact with the second contact body 9B, as in the above embodiment. , The first contact body
Contact between the two members 2B and 9B is ensured via 18B.

With respect to the contact device, an application example of a wedge bulb lamp will be described with reference to FIGS. 3 to 7. Figure 3
FIG. 4 is a vertical sectional view of a wedge bulb lamp. This wedge bulb lamp has substantially the same basic configuration as the conventional example shown in FIGS. 8 and 9, and the same portions are denoted by the same reference numerals and detailed description thereof will be omitted.

In FIG. 3, 17 and 19 are copper through holes for forming the contact pieces 18 and 20, which are formed by using a well-known through hole plating technique used for interconnection between conductors of a double-sided board. , And is formed between the substrate 1 and the electrodes 2 and 3, respectively.

First, in the substrate 1 on which the electrodes 2 and 3 are formed, at the position where the terminals 15 and 16 of the lamp 12 are in contact, the transparent material penetrating from the upper surface 1b side of the substrate 1 to the lower surface side of each of the electrodes 2 and 3. A hole is formed and electroless copper plating is applied to this through hole.
Subsequently, the electrodes 2 and 3 are electroplated together with the upper surface 1b of the substrate 1 to increase the thickness, and then solder plating is performed.

As a result, as shown in FIGS. 3 and 4, conductors 17 and 19 having copper through holes are provided, and contact pieces 18 and 20 projecting from the lower surfaces of the electrodes 2 and 3 are formed. The contact pieces 18 and 20 increase the thickness of the sex electrodes 2 and 3 in the conventional wedge bulb lamp shown in FIGS. 8 and 9 and prevent contact failure due to the bulging portion 7 that occurs during solder dipping. be able to.

That is, this wedge bulb lamp is comparable to the above-mentioned contact device shown in FIG. 1, and regarding the one electrode 2 having the bulging portion 7, the electrode 2 has the above-mentioned striking portion 1.
Member 2A, contact piece 18 to contact body 18A, and terminal 15 to contact body
15A, the base 9 corresponds to the contact body 9A, respectively.
Reference numeral 15a is a contact portion of the contact body 15, and 18a is a contact portion of the contact body 18.

Therefore, in this wedge bulb lamp, when the lamp house 8 is attached to the substrate 1,
The lamp 12 is inserted into the through hole 1a from the back surface 1c side of the substrate 1. When the tip 11a of the holder 11 faces the upper surface 9b of the base 9, the contact pieces 18, 20 of the electrodes 2, 3 are connected to the terminals 15, 16 respectively.
Touches lightly. In this state, as shown by the phantom line in FIG.
It is located on the 2a, 3a side.

Thereafter, when the lamp house 8 is rotated clockwise, the terminals 15 and 16 slide on the electrodes 2 and 3, and the other ends 2b and 3b are fixed at fixed positions (Fig. (6 phantom line positions) at each contact piece 18, 20 with elongated terminals 15, 16
The center of each of the contact points 15a and 18a.

At this time, since the thickness of the electrodes 2 and 3 is increased by providing the contact pieces 18 and 20, a gap G is formed between the tip of the bulging portion 7 and the upper surface 9b of the base 9 (see FIG. 3). , FIG. 4), the bulging portion 7 and the base 9 are kept in non-contact with each other. Further, since the distance between the substrate 1 and the base 9 is increased by the contact pieces 18 and 20, the pressing force against the substrate 1 when the substrate 1 is sandwiched by the tip 11a of the holder 11 and the base 9 increases, and the electrode 2 , 3 and the contact pressure between the terminals 15 and 16 are increased.

As described above, since the wedge bulb lamp of this embodiment is securely electrically connected, the lamp 12 is not lit when the power supply voltage is supplied by mounting it on the dash panel as in the conventional example. It will never happen.

FIG. 7 is a rear view of the substrate showing another embodiment of the wedge bulb lamp. In this wedge bulb lamp, two copper through holes are formed in each of the electrodes 2 and 3 to increase the number of contact pieces. That is, this copper through hole is provided at a position facing both ends of each terminal 15 and 16, and the contact pieces 18, 21 and 20, 22 are formed after electrolytic plating or solder plating as in the above embodiment. To do.

As a result, when the terminals 15 and 16 are brought into contact with the electrodes 2 and 3, both ends of the terminals 15 and 16 are held between the pair of contact pieces 18, 21 or 20, 22 respectively. The terminals 15 and 16 of are contacted stably and surely. Therefore, the wedge bulb lamp of this embodiment has an advantage that the problem of poor contact can be prevented and rattling when vibration is applied can be suppressed.

In the above wedge bulb lamp, the example in which the electrodes 2 and 3 of the substrate 1 are solder-plated has been described, but the masking tape is attached to the required portions of the electrodes 2 and 3 made of copper foil in advance to attach the solder. This can be applied to a case where the terminals 15 and 16 are brought into contact with the exposed copper foil surfaces of the electrodes 2 and 3 by peeling off the data after solder dipping, and the same effect as the above-described embodiment is obtained.

Further, in the above embodiment, the case where the contact device is applied to the wedge bulb lamp has been described, but the present invention is not limited to this example and can be widely adopted in a contact structure for contacting a pair of opposing members. it can. For example, one member is a circular contact, the other member is also a circular or curved contact, and an example in which a bulge is formed between these two contacts, or a member with a small outer diameter is used. It is also applicable to a structure in which a member having a large outer diameter is accommodated with a gap and a bulge portion is formed between both members.

[0035]

As described above, according to the present invention, when the first member and the second member facing each other are brought into contact with each other, the contact body provided between the two members forms the bulging portion and the member. The contact between the two members is blocked prior to the contact between the bulging portion and the member, so that the contact failure due to the bulging portion is prevented. Therefore, there is an effect that contact between the first member and the second member becomes reliable.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a contact device according to the present invention.

FIG. 2 is an explanatory view showing another embodiment of the contact device according to the present invention.

3 is a vertical sectional view of a wedge bulb lamp to which the contact device of the present invention is applied, taken along the line AA of the substrate shown in FIG.

FIG. 4 is a side view showing a wedge bulb lamp according to the present invention in a partial cross section.

FIG. 5 is a back view of the substrate of the wedge bulb lamp according to the present invention.

FIG. 6 is a rear view of the substrate showing a contact state between electrodes and terminals according to the present invention.

FIG. 7 is an explanatory view showing another embodiment of the wedge bulb lamp according to the present invention.

FIG. 8 is a side view showing a partial cross section of a conventional wedge bulb lamp.

FIG. 9 is a back view of a substrate in a conventional wedge bulb lamp.

[Explanation of symbols]

 2 1st member 2A 1st member 2B 1st member 7 Bulging part 7A Bulging part 7B Bulging part 9 2nd member 9A 2nd member 9B 2nd member 18 Contact body 18A Contact body 18B Contact body

Claims (1)

[Claims] 1. A bulging portion formed between a first member and a second member facing the first member, and the bulging portion and the member when the first member and the second member are in contact with each other. A contact device comprising a contact body provided between the first and second members for contacting the first member and the second member prior to contact.