JPH0419722Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an electrode terminal that is attached to a battery case housing a dry battery and comes into contact with the electrode of the dry battery.

(Prior art) Conventionally, as shown in FIG. 3, a negative electrode terminal 2 made of a spirally wound conductor and a positive electrode terminal 3 shaped like a leaf spring made of processed sheet metal are arranged facing each other at both ends of a battery case 1. However, there was one in which the negative electrode 5 and positive electrode 6 of a rod-shaped dry battery 4 were housed in contact with the electrode terminals 2 and 3, respectively.

(Problem to be solved by the invention) However, when loading the dry cell battery 4 into the battery case 1, the extended negative electrode terminal 2 gets in the way. The negative electrode terminal 2 had to be pushed and compressed in the same direction, which required a cumbersome operation with poor workability. In particular, when the dry batteries 4 are stacked and stored in two or more stages, when the dry batteries 4 installed in the lower stage are stored in the battery case, the dry batteries 4 must be tilted particularly greatly, resulting in extremely poor operability.

Furthermore, as shown in FIG. 4, when the dry battery 4 is housed in the case 1, the negative electrode terminal 2 is compressed so that its height becomes negligibly small compared to the length A of the dry battery 4. , and the height of the positive electrode terminal 3 is also negligibly small compared to the length A of the dry battery 4.
If the battery case 1 can be accommodated in the battery case 1 without tilting, the length W of the battery case 1 need only be longer than the length A of the dry battery 4, but the dry battery 4 cannot be accommodated in the battery case 1 unless the dry battery 4 is tilted. Therefore, the length W of the dry battery case 1 must be longer than the diagonal length B of the body shape of the dry battery 4. Furthermore, by using a leaf spring folded in two instead of a coil spring as the negative electrode terminal 2, and by slanting the contact surface of the leaf spring to the battery negative electrode 5, good operability can be achieved by allowing the battery 4 to be inserted and removed without tilting. In addition to this, the dry battery 4 can be accommodated in the battery case 1 without tilting, so the length W of the battery case 1 can be reduced. While repeating this, the elastic restoring force is easily lost,
There was a problem of low reliability, such as poor contact with the dry battery 4.

This invention was made to solve the above-mentioned conventional problems, and it made it possible to insert the dry cell battery into the battery case with ease of operation, shorten the length of the battery case, and The purpose of the present invention is to provide a negative electrode terminal for a dry battery case that can maintain reliable elastic contact with the battery case for a long period of time.

(Means for Solving the Problems) In order to achieve the above object, the negative electrode terminal of the dry battery case according to this invention has elasticity in the negative electrode terminal that is attached to one end of the dry battery case and contacts the negative electrode of the rod-shaped dry battery. It is made up of a coil spring made of conductive metal wire wound helically, and has a shortened part in which the interval between adjacent windings is small, and an extended part in which the interval between adjacent windings is formed larger than the shortened part. , the compression part is located on the side surface of the coil spring at positions symmetrical to each other with respect to the central axis, the compression part is located on the side of the opening for taking in and taking out the battery of the dry battery case, and the compression part is located on the side of the bottom plate of the dry battery case. It is constructed by positioning and assembling the extension part.

(Function) With this structure, when the battery is inserted into the battery case while being held horizontally without tilting, the negative electrode of the battery will move along the slope of the electrode contact part of the negative electrode terminal. The negative electrode terminal, especially the extended portion, is compressed and the dry battery is housed in the battery case.

(Example) This invention will be described in detail below based on an example shown in the drawings.

As shown in FIG. 1, at both ends of the dry battery case 10, there are a positive electrode terminal 11 shaped like a plate spring made of processed sheet metal, and a negative electrode terminal 12 made of a coiled spring made of an elastic conductive metal wound spirally. placed opposite,
The positive and negative electrodes 6 and 5 of the housed rod-shaped dry battery 4 are in contact with these positive and negative electrode terminals 11 and 12, respectively. The negative electrode terminal 12 has a compressed part 14 formed so that the interval d between adjacent windings is small and the coil length is short, and a compressed part 14 formed so that the interval D between adjacent windings is larger than that of the compressed part 14 and the coil length L is longer. The compressed part 14 and the extended part 15 are wound continuously in a smooth curve, and the compressed part 14 and the extended part 15 are wound continuously in a smooth curve, and the end of the winding at the tip The electrode contact part 16 formed in the part has the maximum slope, and the electrode contact part 16 formed in the dry battery case 1
The negative electrode terminal 12 is installed so that the compressed part 14 is located on the side of the opening 17 for taking in and out the dry battery 4 of 0, and the extension part 15 is located on the side of the bottom body 18. This negative electrode terminal 12 is formed in a circular spiral shape, and its winding diameter is greater than the base 19 and the electrode contact portion 1.
Although it is formed to become smaller toward the base 1, it may also be formed in a rectangular spiral shape.
The winding diameters of the electrode contact portion 9 and the electrode contact portion 16 may be the same, or the base portion 19 may be formed to have a smaller diameter.
In either case, the electrode contact portion 16 is formed smaller than the negative electrode 5 of the dry battery 4 to ensure reliable contact.

When storing two dry batteries 4 in a stacked manner, as shown in FIG.
A pair of positive electrode terminals 11 and negative electrode terminals 12 are arranged facing each other in two stages, and the compressed portions 14 of the negative electrode terminals 12 are assembled toward the opening 17 of the dry battery case 20.

It is configured as above, with dry battery case 1
As shown in FIG.
along the slope of the electrode contact portion 16 of the negative electrode terminal 1
Insert the dry battery 5 while compressing the extension part 15 of 2, and then push the battery 4 a little toward the negative electrode terminal 12 so that the positive electrode terminal 11 and the positive electrode 6 do not touch each other, and release your hand. .6 and terminal 12.1
1 are in contact with each other, and the dry battery 4 is housed in the normal position within the dry battery case 10. In this way, dry battery 4
can be easily accommodated with good operability by simply pushing it into the battery case 10 without tilting it.
Since the dry battery 4 can be inserted into the battery case 10 in a horizontal state without tilting, the negative electrode terminal 12 is pressed when the dry battery 1 is placed in the battery case 10 as shown in FIG. As a result of being shortened, its height is negligibly small compared to the length A of the dry cell 4, and the height of the positive electrode terminal 11 is also negligibly small compared to the length A of the dry cell 4. If it is,
Since the length W of the battery case 10 can be shortened to approximately the same length as the length A of the dry battery 4, this contributes to miniaturization of the device. Furthermore, the negative electrode terminal 12
Since the elasticity of is based on the torsional stress of the coil spring, it does not easily lose its elastic recovery power even if it is expanded and contracted many times, and reliable contact with the dry cell battery 4 is maintained for a long time, resulting in high reliability. Also, replace the dry battery 4 with 2
In the case of the dry battery case 20 that is housed in a tier, the first dry battery 4 is placed in the same manner as shown in FIG.
When inserted in a horizontal state, they are compressed and moved from the upper stage to the lower stage negative electrode terminal 12, and are housed in a state in contact with the lower stage electrode terminals 11 and 12.
The second dry battery 4 is similarly accommodated in the upper stage.

(Effects of the invention) As described above, according to this invention, the dry cell battery can be inserted into the battery case in a horizontal position, so it is possible to improve the operability of storing the dry cell battery, and also to make the dry cell case smaller. This has the practical effect of contributing to the miniaturization of devices and providing highly reliable electrode terminals that can maintain reliable elastic contact with dry cell electrodes for long periods of time. can get.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the electrode terminal of a dry battery case implementing this invention, Fig. 2 is a cross-sectional view showing another embodiment, Fig. 3 is a cross-sectional view showing the conventional example, and Fig. 4 is the same conventional example. FIG. 5 is a sectional view showing an electrode terminal of a dry battery case in which this invention is implemented. 4... Dry battery, 5... Negative electrode, 10.20...
Dry battery case, 12... Negative electrode terminal, 13... Compression part, 15... Extension part, 16... Electrode contact part, 1
7...opening, 18...bottom plate.

Claims (1)

[Scope of utility model registration request] The negative electrode terminal, which is attached to one end of the dry battery case and contacts the negative electrode of the rod-shaped dry cell, is made of a coil spring made of elastic conductive metal wire wound in a spiral, and the spacing between adjacent windings is small. and an elongated part in which the interval between adjacent windings is larger than the shortened part are located on the side surface of the coil spring at positions symmetrical to each other with respect to the central axis, and the dry battery can be inserted into and removed from the dry battery case. A negative electrode terminal for a dry battery case, characterized in that the compressed part is located on the side of the opening for the dry battery case, and the extension part is located on the side of the bottom plate of the dry battery case.