JP2002170617A - Coil spring connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to automatically and simultaneously mount a plurality of coil springs serving as a contact piece. SOLUTION: The coil spring connector comprises a plurality (two pieces in this case) of coil strings 1A serving as contact pieces, and an insulation holder 2A holding those coil springs 1A. The holder 2A comprises a plurality (a pair in this case) of holding parts 2a holding a plurality of coil springs 1A with intervals, and a sticking part 2b including a flat surface 26. It is enabled to automatically and simultaneously mount a plurality of the coil springs 1A, by sticking and holding the holder 2A holding a plurality of coil springs 1A at the flat surface 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil spring connector for connecting electrodes of an electric component, a circuit board and the like by a coil spring as a contact in electronic equipment such as a portable telephone.

[0002]

2. Description of the Related Art FIGS. 9 and 10 show examples of a conventional coil spring connector. This coil spring connector is constituted by a single conical coil spring 1 as a contact as shown in FIG. FIG. 10 illustrates a case where the opposing circuit boards 3 and 4 are connected by such a coil spring connector. In this case, the coil spring 1 has the large-diameter end turn portion 12 ′ provided on the large-diameter side thereof soldered to the electrode pad 3 a of one circuit board 3,
The small-diameter end winding portion 11 provided on the small-diameter side is
Is elastically pressed against the electrode pad 4a.

[0003]

The conventional coil spring connector as described above has the following problems.
That is, since the conventional coil spring connector is constituted by the coil spring 1 alone, there is no flat surface that can be suctioned, and automatic mounting by suction cannot be performed. In addition, when configuring as a multi-pole connector using a plurality of coil springs, a plurality of coil springs 1 must be mounted one by one. For this reason, it is difficult to improve the efficiency of the mounting process in the conventional coil spring connector.

[0004] The present invention has been made in view of the above points, and it is an object of the present invention to provide a coil spring connector that can automatically mount a plurality of coil springs as contacts simultaneously. .

[0005]

According to a first aspect of the present invention, there is provided an insulating member having a plurality of coil springs as contacts, a holding portion for holding these coil springs at intervals, and a suction portion including a flat surface. A coil spring connector comprising a holder.

According to the first aspect of the invention, the holder holding the plurality of coil springs is suction-held on the flat surface of the suction portion, so that the plurality of coil springs as contacts can be automatically mounted simultaneously. It becomes possible.

In a second aspect based on the first aspect, the coil spring has a pair of end turns and a connection spring connecting the end turns to each other. The portion has a holding portion that is held by a pair of end turns of the coil spring.

According to the second aspect, in the first aspect, the coil spring holds the holding portion of the holder by the elastic force by holding the holding portion of the holder by the pair of end turns. it can.

In a third aspect based on the second aspect, in the holding portion of the holder, the side of the coil spring corresponding to at least one of the pair of end turns receives the end turn. It is formed as a concave portion for positioning.

According to the third aspect, in the second aspect, the holder receives and positions the end turn portion of the coil spring by the holding portion formed as a concave portion, so that the coil spring can be more reliably held. Can be held.

In a fourth aspect based on the second or third aspect, the holder further has a notch for receiving a connecting spring portion of the coil spring from a side.

According to the fourth aspect, in the second or third aspect, the coil spring can be easily attached to the holder from the side.

In a fifth aspect based on any of the first to fourth aspects, the holder further includes an electrode portion electrically connected to the coil spring, and is connected by the coil spring. Formed integrally with one of the circuit board and the electric component.

According to the fifth aspect, in any one of the first to fourth aspects, the coil spring may be attached to one of the circuit boards or the electric components in a state where the coil spring is electrically connected in advance. Therefore, the process for connecting the circuit board or the electrical component to the other circuit board or the electrical component can be greatly simplified.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 8 are views showing an embodiment of a coil spring connector according to the present invention. Note that, in the embodiment of the present invention shown in FIGS.
The same components as those of the conventional example shown in FIG. 9 and FIG.

[First Embodiment] Next, a first embodiment of the present invention will be described with reference to FIGS.

<Structure> In FIG. 1, the coil spring connector according to the present embodiment includes two coil springs 1A as contacts, and an insulating holder 2A that holds these coil springs 1A.

Next, as shown in FIG. 2, the coil spring 1A
Is in addition to the main body spring portion 10 as a conical coil spring,
It has a pair of large-diameter end turns 12, 12 and a connection spring 13 provided on the large-diameter side. The connection spring portion 13 connects between the pair of large-diameter end winding portions 12, 12,
It is formed as a short coil spring having a smaller diameter than these large-diameter end turns 12. A small-diameter end turn 11 similar to a conventional coil spring is provided on the small-diameter side of the main body spring 10.

Next, as shown in FIGS. 1 and 3, the holder 2A has a pair of holding portions 2a for holding the two coil springs 1A at intervals, and a suction portion 2b including a flat surface 26. ing. Each holding portion 2a of the holder 2A has clamping portions 20, 21 which are clamped by a pair of large-diameter end turns 12, 12 of the corresponding coil spring 1A. Of these holding portions 20, 21, the holding portion 21 on the side corresponding to the main body spring portion 10 (FIG. 1B) of the coil spring 1A receives and positions the large-diameter end turn portion 12 on the main body spring portion 10 side. It is formed as a circumferential recess 21.

The holder 2A has two coil springs 1A.
Has a pair of U-shaped notches 22 for receiving the connection spring portions 13 (FIG. 1B) from the side. These cutouts 22 are generally formed in the same direction as shown in the figure, but may be formed in different directions.

Incidentally, chamfered portions 23, 24 for facilitating insertion of the coil spring 1A are formed on the opening side of the cutout portion 22 in the holder 2A. Specifically, FIG.
In the first embodiment, chamfered portions 23 inclined in a direction perpendicular to the axial direction of the coil spring 1 </ b> A are formed on both sides of the opening of each cutout 22. In addition, the chamfered portion 24 inclined in the axial direction of the coil spring 1A is provided on the upper surface side (the concave portion
Side).

Here, the dimensional relationship between the coil spring 1A and the holder 2A will be briefly described. First, in the coil spring 1A shown in FIG. 2B, the outer peripheral radii of the large-diameter end turn portion 12 and the connection spring portion 13 are denoted by r1 and r2, respectively.
The interval between the pair of large-diameter end winding portions 12, 12 is d1.
Further, in the holder 2A shown in FIG. 3, the radii of the circumferential portions of the concave portion 21 and the cutout portion 22 are R1 and R2, respectively (FIG. 3A), and the thickness of the holder 2A in the concave portion 21 is D1 ( FIG. 3 (b). In that case, the coil spring 1
The dimensional relationship between A and the corresponding portion of the holder 2A is r1 <R1;
r2 <R2; d1 <D1.

FIG. 4 illustrates a case where the opposing circuit boards 3 and 4 are connected by the coil spring connector of the present embodiment, similarly to the case of the conventional example shown in FIG. In this case, each coil spring 1A held by the holder 2A has its outer large-diameter end turn 12 soldered to the electrode pad 3a of one of the circuit boards 3, and the smaller-diameter end turn 11
Are elastically pressed against the electrode pads 4a of the other circuit board 4.

<Modifications> The case where one coil spring contact includes two coil springs 1A has been described as an example, but an arbitrary number of three or more coil springs 1A has been described.
Of course, it may be provided.

The case where the pair of large-diameter end winding portions 12 and 12 have the same diameter (outer radius r1) has been described. May be provided. FIG. 2
In (b) and the like, each of the pair of large-diameter end winding portions 12 is 1
Although the case where each winding is formed is shown, the winding may be formed with an arbitrary number of turns such as one and a half as long as it can be held by the holder 2A.

<Function and Effect> Next, the function and effect of the embodiment having the above-described configuration will be described. According to the present embodiment, the holder 2A holding the plurality of coil springs 1A
Is held on the flat surface 26 of the suction portion 2b, whereby a plurality of coil springs 1A as contacts can be automatically mounted at the same time. Accordingly, the efficiency of the mounting process can be significantly improved in electronic devices using the coil spring connector.

Further, the coil spring 1A is configured such that a pair of large-diameter end turns 12, 12 hold the holding portions 20, 21 of the holder 2A.
Can be held by the elastic force of the connecting spring portion 13. In this case, the holder 2A is fixed to the coil spring 1A by the holding portion 21 formed as a concave portion.
By receiving and positioning the large-diameter end turn 12 of the coil spring 1A, the coil spring 1A can be held more reliably.

The holder 2A has a cutout portion 22 for receiving the connecting spring portion 13 of the coil spring 1A from the side and the chamfered portions 23 and 24, so that the coil spring 1A
Can be easily attached to the holder 2A from the side.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS. In addition,
In the present embodiment shown in FIGS. 5 and 6, FIGS.
The same reference numerals are given to the same components as those of the above-described first embodiment, and detailed description is omitted.

<Structure> The coil spring connector of the present embodiment shown in FIG. 5 has a coil spring 1B as a plurality of contacts.
And an insulating holder 2B for holding these coil springs 1B at intervals.

As shown in FIG. 5, the coil spring 1B includes a pair of main body springs 110 as cylindrical coil springs, and a connecting spring 1 connecting the main body springs 110 to each other.
13 are provided. Each body spring portion 1 of the coil spring 1B
10 is a tip end winding portion 11 provided at the tip portion, respectively.
1 and a base end turn 112 provided at the base end on the connection spring 113 side. Also, the connection spring 113
Are base end turn portions 112 and 11 of a pair of main body spring portions 110.
2 and the base end turn 11
It is formed as a short coil spring with a diameter smaller than 2.

The insulating holder 2B has a shape such that two lower surfaces of the insulating holder 2A of the first embodiment (FIG. 2B) are combined. That is, the insulating holder 2B includes a holding portion 21 as a circumferential recess for receiving and positioning the base end turn 112,
Both chamfered portions 24 are formed on the upper and lower sides. Other configurations are the same as those of the insulating holder 2A of the first embodiment shown in FIGS. 1 and 3.

FIG. 6 exemplifies a case where the opposing circuit boards 3 and 4 are connected by the coil spring connector of the present embodiment, similarly to the case of the first embodiment shown in FIG. I have. In this case, the coil spring 1B held by the holder 2B is provided with front end swirling portions 111 on both sides thereof.
Are elastically pressed against the electrode pads 3a and 4a of the circuit boards 3 and 4, respectively.

<Modification> From the viewpoint of reducing the height of the coil spring contact, one or both of the main body spring portions 110 in the coil spring 1B may be constituted by a conical coil spring instead of a cylindrical coil spring. You may.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIGS.

<Structure> In this embodiment, as shown in FIGS. 7 and 8, an insulating holder 2C is formed integrally with a speaker unit 5 for a portable telephone as an electric component connected by a coil spring 1A. The second embodiment differs from the first embodiment in that the other configurations are substantially the same as those of the first embodiment shown in FIGS.

Specifically, the holder 2C constituting the coil spring connector of the present embodiment is formed integrally with the insulating frame 50 surrounding the diaphragm 52 of the speaker unit 5 so as to protrude from one side thereof. I have. Further, on the front side of the holder 2C (the side where the diaphragm 52 is visible as shown in FIG. 7), a flat plate-like electrode section 27 electrically connected to each coil spring 1A corresponds to each holding section 2a. It is provided. In this case, each electrode section 27 forms an input terminal of the speaker unit 5.

In the present embodiment, as best shown in FIG. 7B in comparison with FIG. 1B, each coil spring 1A is mounted in the opposite direction to that of the first embodiment. Have been. Then, of the pair of large-diameter end turns 12, 12 in each coil spring 1A, the main body spring 1
The large-diameter end turn 12 on the opposite side, not the zero side, is received in the circumferential recess 21. In this case, the main body spring portion 1
The large-diameter end turn portion 12 on the zero side is pressed against the electrode portion 27 at the holding portion 20.

The speaker unit 5 integrally formed with the coil spring connector as described above has a small diameter end winding of each coil spring 1A with respect to the electrode pad 4a of the circuit board 4 as shown in FIG. The portion 11 is elastically pressed to be electrically connected to the circuit board 4.

<Modifications> In the present embodiment, the speaker unit 5 for a cellular phone has been described as an example of an electric component integrally forming the holder 2C. They may be formed integrally.

<Effects> According to the present embodiment, the coil spring 1A can be attached to one of the circuit boards or the electric components in a state of being electrically connected in advance. Can be greatly simplified in connecting to the other circuit board or the electric component.

[0042]

According to the present invention, it is possible to automatically mount a plurality of coil springs as contacts by holding a holder holding a plurality of coil springs by suction on a flat surface of the suction portion. Becomes Therefore, in electronic devices using the coil spring connector, the component mounting process can be made much more efficient.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams showing a first embodiment of a coil spring connector according to the present invention, wherein FIG. 1A is a plan view, and FIG. 1B is a sectional view taken along line XX of FIG.

FIGS. 2A and 2B are diagrams each showing a coil spring alone in the coil spring connector shown in FIG. 1, wherein FIG.
(B) is a side view.

3A and 3B are diagrams each showing an insulating holder alone in the coil spring connector shown in FIG. 1, wherein FIG.
(B) is a sectional view taken along line YY of (a), and (c) is a plan view of (a) viewed from the back side.

FIG. 4 is a diagram showing an example of a connection state of the coil spring connector shown in FIG. 1 in a cross section corresponding to FIG. 1 (b).

FIG. 5 is a diagram showing a second embodiment of the coil spring connector according to the present invention in a cross section corresponding to FIG. 1 (b).

6 is a diagram showing an example of a connection state of the coil spring connector shown in FIG.

FIGS. 7A and 7B are views showing a third embodiment of the coil spring connector according to the present invention, wherein FIG. 7A is a plan view and FIG. 7B is a sectional view taken along line ZZ of FIG.

8 is a plan view of the coil spring connector shown in FIG. 7 as viewed from the back side.

9A and 9B are views showing a coil spring alone constituting a conventional coil spring connector, wherein FIG. 9A is a plan view and FIG. 9B is a side view.

FIG. 10 is a longitudinal sectional view showing an example of a connection state of the coil spring connector shown in FIG. 9;

[Explanation of symbols]

 Reference Signs List 1A coil spring 10 main body spring part 11 small diameter end turn part 12 large diameter end turn part (a pair of end turn parts) 13 connecting spring part 2A insulating holder 2a holding part 20 holding part 21 holding part formed as a concave part 22 notch part 23 , 24 chamfered portion 2b suction portion 26 flat surface 1B coil spring 110 main body spring portion 111 tip end turn portion 112 base end end turn portion (a pair of end turn portions) 113 connecting spring portion 2B insulating holder 20 holding portion formed as a concave portion 2C Insulating holder 27 Electrode part 3 One circuit board 4 The other circuit board 5 Speaker unit (electric part)

Claims (5)

[Claims] 1. A plurality of coil springs as contacts, a holding portion for holding these coil springs at intervals,
A coil spring connector comprising: an insulating holder having a suction portion including a flat surface. 2. The coil spring has a pair of end turns and a connecting spring connecting the end turns to each other. The holding portion of the holder includes a pair of seats of the coil spring. The coil spring connector according to claim 1, further comprising a holding portion held by the winding portion. 3. The holding portion of the holder has a holding portion in which a side corresponding to at least one of the pair of end turns of the coil spring is formed as a recess for receiving and positioning the end turn. The coil spring connector according to claim 2, wherein: 4. The coil spring connector according to claim 2, wherein the holder further includes a cutout portion for receiving a connecting spring portion of the coil spring from a side. 5. The holder further includes an electrode portion electrically connected to the coil spring, and is integrally formed with one of a circuit board and an electric component connected by the coil spring. 2. The method according to claim 1, wherein
A coil spring connector according to any one of claims 1 to 4.