JP2553276Y2 - Terminal connection structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection structure for electrically connecting first and second terminals arranged opposite to each other.

[0002]

2. Description of the Related Art When it is necessary to electrically connect a first terminal and a second terminal disposed opposite to each other, use of a lead wire or the like deteriorates workability. The connection structure described is used.

That is, in FIG. 3, a boss 2 and a first terminal 3 are provided on the upper surface of a body 1 as a first substrate, and a second terminal 5 having a second terminal 5 is provided on an inner surface of a cover 4. Two substrates 6 are attached.

[0004] When electrically connecting the terminals 3 and 5 to each other, a conductive coil spring 7 is attached to the boss 2.
Is loosely fitted to bring the lower end surface of the coil spring 7 into contact with the first terminal 3, and then cover the upper surface of the body 1 with the cover 4 and fix the cover 4 to the body 1. The upper end surface is brought into contact with the second terminal 5. The boss 2 is for preventing the coil spring 7 from being displaced from the terminals 3 and 5.

[0005]

However, in the above connection structure, since the coil spring 7 is loosely fitted to the boss portion 2, the above-mentioned work is particularly difficult in the above-described operation.
When the terminals 3 and 5 are arranged to face each other with the cover 4 covered with the cover 4, the coil spring 7 may come off from the boss 2.

In view of this, it is conceivable to adopt a structure in which the inner diameter of the coil spring and the outer dimension of the boss are substantially the same, and the coil spring is pressed into the boss. In this case, however, the coil spring extends over the entire boss. Is fitted, so that the coil spring cannot expand and contract in the axial direction. As a result, a necessary contact pressure cannot be obtained between both end surfaces of the coil spring and both terminals, and a contact failure may occur. There is.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent the coil spring from coming off the boss as much as possible, and furthermore, to provide a poor contact between the coil spring and both terminals. Another object of the present invention is to provide a terminal connection structure that can also prevent the connection.

[0008]

According to the present invention, a first substrate having a first terminal is provided, and a second substrate having a second terminal opposed to the first terminal is provided.
And a boss protruding toward the second terminal is provided at the first terminal portion of the first substrate, and both ends are fitted to the boss and the first and second end faces are respectively provided. In a terminal connection structure provided with a conductive coil spring that contacts both terminals, an intermediate portion of the coil spring is fitted to the boss and both ends are not in contact with the boss. It is characterized by having such a configuration.

[0009]

According to the above means, since the coil spring is fitted to the boss, the coil spring does not come off the boss. In this case, since the middle portion of the coil spring is fitted and both ends are not in contact with the boss, both ends of the coil spring can freely expand and contract in the axial direction of the boss. As a result, both end faces of the coil spring are
Both terminals come into contact with sufficient pressure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.

A boss 12 projects upward from the upper surface of the body 11 as the first substrate. A first terminal 13 is mounted on the boss 12,
The boss 12 is located at the first terminal 13 of the body 11. In this case,
A circular hole 13a is formed in the first terminal 13, and the first terminal 13 is mounted on the boss portion 12 by fitting the hole 13a from above.

A printed wiring board 15 as a second substrate is attached to the inner surface of a cover 14 that covers the upper surface of the body 11.
Terminal 1 disposed opposite terminal 13
6 is formed by pattern printing.

A conductive coil spring 17 plated with silver is fitted to the boss 12 of the body 11.
The coil spring 17 has an inner diameter at both ends set to be larger than an outer diameter of the boss portion 12, and an inner diameter at an intermediate portion is set to the boss portion 12.
The dimensions are set to be approximately equal to the outer diameter of. Therefore, large-diameter portions 17a, 17a are formed at both ends of the coil spring 17 so as to be in a non-contact state with the outer peripheral surface of the boss portion 12, and are fitted to the outer peripheral surface of the boss portion 12 at the intermediate portion. Small diameter part 17
b is formed.

Next, the first and second terminals 13,
A procedure for electrically connecting the sixteen devices will be described.

First, the coil spring 17 is fitted into the boss portion 12 from the large-diameter portion 17a side, and the small-diameter portion 17b of the coil spring 17 is fitted.
Is fitted to the tip of the boss 12, and the lower end surface of the coil spring 17 is brought into contact with the first terminal 13. Next, in this state, when the cover 14 is put on the upper surface of the body 11 and the cover 14 is fixed to the body 11, the upper end surface of the coil spring 17 comes into contact with the second terminal 16, and the two terminals 13, 16 The connection is made electrically.

According to the above configuration, the following effects can be obtained.

That is, since the coil spring 17 is formed with the small-diameter portion 17b so that the coil spring 17 is fitted to the boss portion 12, both the first and second terminals 13, 16 are provided.
When connecting each other, the coil spring 17 can be prevented from coming off the boss 12 as much as possible, particularly when the terminals 13 and 16 are opposed to each other with the cover 14 placed on the upper surface of the body 11.

In this case, the small diameter portion 17b is connected to the coil spring 17
Since the large-diameter portions 17a and 17a are formed at both ends of the coil spring 17 so that both ends of the coil spring 17 are not in contact with the boss portion 12, Both ends of the coil spring 17 can freely expand and contract in the axial direction of the boss 12. Therefore, both end surfaces of the coil spring 17 come into contact with both terminals 13 and 16 with a sufficient pressure.
Poor contact between 3 and 16 can be prevented as much as possible.

In the above embodiment, the coil spring 1
By forming the small-diameter portion 17b and the large-diameter portions 17a, 17a on the boss 7, the middle portion of the coil spring 17 is fitted to the boss portion 12, and both ends are not in contact with the boss portion 12. However, for example, a configuration as shown in FIG. 2 may be used.

That is, the coil spring 18 is formed in a cylindrical shape having a constant diameter, and a large-diameter portion 19 a to which the coil spring 18 is fitted is formed at the tip of the boss 18.
In this case, the first terminal 13 is formed with a U-shaped notch 13b opening laterally (perpendicular to the paper surface), and the notch 13b is fitted into the boss 12 from the side. By doing so, the first terminal 13 is mounted.

[0021]

As is clear from the above description, according to the terminal connection structure of the present invention, the middle part of the coil spring is fitted to the boss, and both ends are not in contact with the boss. Since the coil spring is in the state, it is possible to prevent the coil spring from deviating from the boss portion, and it is possible to prevent contact failure between the coil spring and the first and second terminals.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a view corresponding to FIG. 1 showing another embodiment of the present invention.

FIG. 3 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

11 is a body (first substrate), 12 is a boss, 13 is a first terminal, 15 is a printed wiring board (second substrate), 16 is a second terminal, 17 is a coil spring,
7a is a large diameter part, 17b is a small diameter part, 18 is a coil spring, 1
9 denotes a boss portion, and 19a denotes a large diameter portion.

Claims (1)

(57) [Scope of request for utility model registration] A first substrate having a first terminal; and a second substrate opposed to the first terminal.
A boss portion provided on the first terminal portion of the first substrate and protruding toward the second terminal, and both end faces fitted to the boss portion and having both end faces, respectively. A conductive coil spring that contacts both the first and second terminals, wherein an intermediate portion of the coil spring is fitted to the boss portion and both ends of the coil spring are not in contact with the boss portion. A connection structure for a terminal, wherein the connection structure is configured to be in a contact state.