JPH046126Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a structure of a connecting terminal that can stabilize the electrical connection between a planar electrode of a battery or the like and the connecting terminal.

(Prior art) In various devices that use batteries such as dry batteries as a power source, electricity is generated by press-contacting connection terminals with a spring structure made of conductive metal thin plates, etc., to the positive and negative electrodes of the battery. I am getting a good connection.

The surface of the negative side electrode of each electrode of the battery is configured in a planar shape, and by configuring the contact surface of the connecting terminal connected to it in various ways, it can be used in various ways such as surface contact, line contact, point contact, etc. A contact pattern can be obtained. When ranking the reliability of each contact mode, the order is surface contact, line contact, single point contact, and multiple point contact. Furthermore, in relation to the spring pressure, the larger the spring pressure, the higher the contact reliability. However, when observed microscopically, most surface contacts and line contacts belong to multi-point contacts, and as the pressure contact force due to the spring structure is dispersed to each point, the pressure contact force per each point decreases and the contact Both conditions are poor.

On the other hand, in the case of single-point contact, the contact pressure is concentrated at one point, so under optimal conditions it is possible to obtain sufficient contact and conduction, but the spring pressure may decrease or rust may occur at that one point. If this occurs, or if the connection angle or connection position with the battery surface electrode is shifted, there is a risk that poor contact will easily occur.

FIGS. 2a, b and 3 a, b are explanatory diagrams of the contact state between the conventional connection terminal and the electrode of a dry battery,
In FIGS. 2a and 2b, the connecting terminal 3 that contacts the negative side pole 2 of the battery 1 is in linear contact (indicated by the symbol A) at its contact piece 3a. Also,
The connecting terminals 4 in FIGS. 3a and 3b are in one point contact (reference numeral B) through their protruding contact pieces 4a.

However, line contact as shown in Figure 2 a and b tends to result in uneven contact (strictly speaking, multi-point contact).
Extremely unstable.

In addition, since Figure 3 a and b are single-point contacts, the only way to improve the reliability of the contact is to increase the spring pressure. It is impossible to increase the spring pressure beyond a predetermined value.

(Purpose of the invention) The present invention was made in view of the above, and it is possible to control the connection state between a flat electrode of a dry battery or the like and a connecting terminal connected thereto without increasing the spring pressure.
Moreover, it is an object of the present invention to provide a structure of a connecting terminal that can always be maintained well even when the connection condition deteriorates.

(Summary of the invention) In order to achieve the above object, the structure of the connecting terminal of the present invention is a connecting terminal for establishing electrical continuity by elastically pressing against a planar electrode, and the connecting terminal is electrically conductive. It is characterized by comprising an elastic piece made of a flexible metal plate molded into a spring shape, and a plurality of free end-like contact pieces formed at the tip of the elastic piece.

(Example) Hereinafter, the structure of the connection terminal of the present invention will be explained in detail.

FIGS. 1A, 1B and 1C are a front view, a top view and a side view showing the structure of a first embodiment of the present invention.

This connection terminal is fixed to an elastic piece 11 made of a conductive metal strip having one end curved, and an electrode in a battery box located at the base end of the elastic piece 11 and housing a battery to be connected. A fixed part 12;
It has a contact piece 13 in the form of a free end that is branched into two and led out from the curved end of the elastic piece 11. The free-end contact piece 13 is made by branching one curved end of the elastic piece 11 into a plurality of narrow band-like bodies, and slits 14 are provided at predetermined intervals between each contact piece 13.
form. A semicircular contact protrusion 15 is provided protruding from the outer side of the tip of each contact piece 13, respectively.

The elastic piece 11 and the contact piece 13 can be integrally molded by punching or the like.

It is possible to change the posture (angle) of each contact piece 13 in various ways through its own elastic deformation, so if the battery is installed in a proper posture, it will be in a posture that is almost parallel to the electrode surface. Hold each protrusion 1
5 to the electrode with an even pressure, but if the relative positional relationship between the two changes due to misalignment of the battery, etc., it bends itself so that it can properly contact the electrode surface. Can change posture. Even if it is difficult to bring all the protrusions 15 into contact with the electrode surface with uniform pressure, as long as at least one of the protrusions 15 can ensure sufficient contact with the electrode, It is possible to obtain sufficient conduction. In other words, since the contact pieces 13 can be elastically deformed independently and separately, it is possible to flexibly follow fluctuations in relative position with the electrode surface and obtain good contact. At this time, even if the spring pressure of one of the contact pieces 13 decreases and the contact condition with the electrode deteriorates, as long as the spring pressure of the other contact piece 13 is normal, it will make normal point contact with the electrode. There is no problem because it can be continued, and there is no need to increase the size of the entire connecting terminal in order to increase the spring pressure.
In addition, if there is dirt or other matter attached to a part of the electrode,
Even if the electrical connection between one contact protrusion 15 and the electrode deteriorates due to rust, the other contact protrusion 1
There is no problem as long as 5 is in contact with a normal location on the electrode surface.

The number of contact pieces 13 is not limited to two,
There is no problem in increasing the number as long as it does not become a moderately large number.

In short, the structure is such that at least one of the contact pieces can always maintain reliable contact with the electrode surface by freely changing the attitude of the contact piece with respect to the electrode surface due to the elastic deformation action of the elastic piece. This is the gist of the invention.

In addition, in the present invention, it is possible to sufficiently follow and maintain the connection state not only for planar electrodes but also for curved electrodes and others. Therefore, in the claims, "planar" includes both planar and curved electrodes.

(Effects of the invention) As described above, according to the structure of the connection terminal of the invention, the connection state between the flat electrode of a dry battery, etc. and the connection terminal connected thereto is always good even when the connection condition deteriorates. can be held.

[Brief explanation of the drawing]

Figures 1 a, b and c are a front view, plan view and side view showing the configuration of an embodiment of the present invention, Figures 2 a and b
3a and 3b are explanatory diagrams of the state of contact between the conventional connection terminal and the electrode of the dry battery. DESCRIPTION OF SYMBOLS 11...Elastic piece, 12...Adhering part, 13...Contact piece, 14...Slit, 5...Protrusion.

Claims (1)

[Scope of utility model registration request] A connecting terminal for establishing electrical continuity by elastically pressing against a planar electrode, and the connecting terminal includes an elastic piece formed by bending one end of a conductive thin plate, and a branch from the one end of the elastic piece. and a semicircular contact protrusion protruding from the outer side of the tip of each contact piece toward the electrode surface. A structure of a connecting terminal characterized by: