JP2001102020A - Contact segment for battery in battery box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact segment which, when making two types of contact segments, may simplify a product jig, prevent deformation of the contact segment and make both segments into one common component. SOLUTION: In contact segments for a battery mounted within a battery box, to make two types of contact segments of a positive polarity and a negative polarity into one common component, the contact segment of the positive polarity has support portions 2d and 2d supported within the battery box and a elastically deformable tongue-shaped piece 2a. The support portions 2d, 2d and the tongue-shaped piece 2a are disposed on the same plane. A negative polarity contact segment 2' is also formed to bend the tongue-shaped piece of the positive polarity contact segment in a given angle relative to support portions. Thus, only with bending the tongue-shaped piece of the positive polarity contact segment, the negative polarity contact segment may be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery contact piece mounted on a battery box provided in a timepiece movement or the like.

[0002]

2. Description of the Related Art A general movement for a timepiece as a driving source of a timepiece will be described with reference to FIGS. The watch movement 10 includes a battery box 15,
Circuit board 2 with motor 16 driven by battery
0, a train of wheels (not shown) for transmitting the power of the motor to a pointer shaft (not shown). Inside the battery box 15, a conductive contact piece for connecting the battery to the circuit board 20 is provided. This contact piece is composed of a positive contact piece 11 connected to the positive electrode of the battery and a negative contact piece 12 connected to the negative electrode of the battery, and is connected to a positive terminal and a negative terminal (not shown) provided on the circuit board 20. One end of the positive contact piece 11 and one end of the negative contact piece 12 are fixed by, for example, solder 13.

FIG. 6 shows a structure in which a positive electrode contact piece 11 is placed in a battery box 15.
FIG. 7 is a diagram illustrating a state where the negative electrode contact pieces 12 are mounted in the battery box 15. As shown in FIG. 6, the positive electrode contact piece 11 forms a circular arc portion 11a by bending the tip of one forming wire so as to be round, and forms a protruding portion 11b so that the tip protrudes upward. Have been. As shown in FIG. 4, the other end of the positive electrode contact piece 11 has a mounting portion 11 c formed by bending a forming line projecting from the arc portion 11 a vertically. The mounting portion 11c and the circuit board 20 are
By soldering, the positive electrode contact piece 11 is fixed to the circuit board. Also, as shown in FIG.
The pyramid-shaped winding part 12a is formed by winding the tip part of one forming wire toward the inside of the battery box. As shown in FIG. 4 and FIG. 7, the other end of the negative electrode contact piece 12 is formed by vertically bending a forming wire protruding from the winding part 12a to form an attachment part 12b. The mounting portion 12b and the circuit board 20 are
By soldering, the negative electrode contact piece 12 is attached to the circuit board 20.
It is fixed to.

[0004] As shown in FIG.
5, a support plate 15d provided integrally with the movement case, and a pair of support protrusions 15c, 15c formed inside the support plate 15d are formed integrally with the case. From above the contact piece holding portion formed by the gap between the support protrusions 15c, 15c,
is inserted, the arc portion 11a becomes the support plate 15d.
And the support projections 15d, 15d, and can be fixed to the case. The pair of support plates 15c, 15c
As shown in FIG. 5, the width of the positive electrode 30a is set to be slightly larger than the width of a convex positive electrode 30a of a battery described later.

[0005] As shown in FIG.
5, a support plate 15b provided integrally with the movement case, and a pair of support protrusions 15a, 15a formed inside the support plate 15b are formed integrally with the case. From above the contact piece holding portion formed by the gap between the support protrusions 15a, 15a, the winding portion 12
a into the winding portion 12 having a pyramid shape.
The bottom of a is supported by the support plate 15b and the support protrusions 15a, 15a, and is fixed to the battery box 15. As shown in FIG. 7, the pair of support plates 15a, 15a are provided at a predetermined distance from each other, and the tip of the pyramid-shaped negative electrode contact piece 12 protrudes inward of the battery box from this space. Thus, the negative electrode contact piece 12 is fixed to the battery box 15.

When a battery is inserted into the battery box 15, first, as shown in FIG.
After being inserted into the battery box and engaging with the negative electrode contact piece 12, the positive electrode 30a of the battery is connected to the pair of support plates 15 shown in FIG.
By being inserted into the space between c and 15c, the winding portion 12a of the negative electrode contact piece comes into contact with the negative electrode 30b of the battery, and the protruding portion 11b of the positive electrode contact piece can come into contact with the positive electrode 30a of the battery.

[0007] The projecting portion 11 extends from the tip of the winding portion 12a.
Since the length up to b is set shorter than the length of the battery, when the battery 30 is inserted into the battery box 15, the negative electrode 30b of the battery 30 is pressed by the winding portion 12a, The contact pressure between the battery and the contact piece is kept constant while preventing the battery from dropping from the box.

[0008]

According to the contact structure of the conventional battery box, as shown in FIGS. 7 and 8, the positive electrode section 11 and the negative electrode section 12 are formed of the same forming wire but bent. And the shape is completely different. Therefore, when manufacturing the positive electrode contact piece and the negative electrode contact piece, two large-scale jigs are required, namely, a production jig for the positive electrode contact piece and a production jig for the negative electrode contact piece.

Further, such contact pieces are transported and managed by, for example, placing 20000 to 5000 negative contact pieces 12 in a plastic bag, but as shown in FIG.
Is wound in a pyramid shape, the winding portions 12a of the negative electrode contact pieces 12 are entangled with each other, and it is difficult to remove the negative electrode contact pieces 12 one by one from the plastic bag. When removing, pulling strongly,
In some cases, the winding part 12a was deformed and the contact pressure with the battery could not be kept constant.

In addition, since the positive electrode contact piece and the negative electrode contact piece are completely different in bending method and formed completely different in shape, it has not been possible to form both contact pieces into a common part.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to simplify a manufacturing jig and prevent deformation of a contact piece when producing two types of contact pieces. Another object of the present invention is to provide a contact piece that can be used as a common part for both contact pieces.

[0012]

According to a first aspect of the present invention, a battery contact piece is provided with a cantilever shape which is elastically deformable with a holding portion held by a battery box. A positive electrode contact piece having a tongue piece and having the holding part and the tongue piece arranged on the same plane, and a negative electrode contact piece obtained by bending the tongue piece of the positive electrode contact piece at a predetermined angle with respect to the holding part.

As described above, when the tongue piece 2a having a U-shape and elasticity is provided on the contact piece and the positive electrode contact piece 2 is manufactured, the tongue piece 2a is not bent and the upper surface is held against the holding portions 2d. It is designed to be a flat plate. When the negative electrode contact piece 2 'is manufactured, the free end of the tongue piece 2a' is bent so as to protrude inward with respect to the holding portions 2'd, 2'd to maintain the contact pressure with the battery. Can be. Therefore, the common parts of the positive electrode contact piece and the negative electrode contact piece can be formed with a simple jig. Further, the tongue of the negative electrode contact piece is U-shaped, and it is possible to prevent the negative electrode contact pieces put in the plastic bag from becoming entangled with each other as much as possible, so that the deformation of the contact piece can be prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete example of the structure of the contact piece of the present invention will be described below with reference to FIGS. In addition,
The same reference numerals are used for components having the same configuration as the conventional one. Comparing this specific example with the conventional example, only the structure of both contact pieces is different, and the other parts are the same as the conventional example. In addition, although the positive electrode contact piece and the negative electrode contact piece of this specific example are common parts, for the sake of simplicity, reference numerals are set to 2 for the positive electrode contact piece and 2 'for the negative electrode contact piece.

As shown in FIG. 1, a timepiece movement 1
Reference numeral 0 denotes a battery box 15, a circuit board 20 on which a motor 16 driven by a battery is mounted, and a wheel train (not shown) for transmitting the power of the motor to a pointer shaft (not shown). Inside the battery box 15, the battery and the circuit board 2
Conductive contact pieces 2 and 2 ′ for connecting 0 are provided. The contact pieces 2 and 2 ′ include a positive contact piece 2 connected to the positive electrode of the battery and a negative contact piece 2 ′ connected to the negative electrode of the battery.
One end of the positive contact piece 2 and one end of the negative contact piece 2 ′ are fixed to the positive terminal and the negative terminal (not shown) provided on the circuit board 20 by solder portions 13, 13.

FIG. 2 is a view showing a shape of the positive electrode contact piece 2 and a shape before processing of a negative electrode contact piece 2 ′ described later, and FIG. 3 is a view showing a shape of the negative electrode contact piece 2 ′ after processing. is there. As shown in FIG. 2, the shape of the contact piece 2 is formed in a substantially M-shape.
It is formed by bending one forming line. More specifically, the contact piece 2 has its tip bent at an angle of 90 degrees upward in FIG. 2 to form a holding portion 2d, and the holding portion 2d is bent at an angle of 90 degrees rightward in FIG. The upper portion 2c is bent downward at an angle of 90 degrees in FIG. 2 to form the elastic portion 2aa, and the elastic portion 2a is formed.
a is bent rightward in FIG. 2 at an angle of 90 degrees to form an elastic tip 2ab, and the elastic tip 2ab is bent upward at an angle of 90 degrees in FIG. 2 to form an elastic portion 2aa again,
This elastic portion 2aa is bent rightward in FIG. 2 at an angle of 90 degrees to form an upper end portion 2c again.
The holding portion 2d is formed again by being bent at an angle of 90 degrees in the middle and lower directions.

As shown in FIG. 2 (A), the shape of the positive electrode contact piece 2 and the shape of the negative electrode contact piece 2 'before processing are the holding portions 2d, 2d, the upper end portions 2c, 2c, and the elastic portion 2aa. , The elastic tip portions 2ab are arranged so as to be on the same plane.

When manufacturing the positive electrode contact piece 2, FIG.
As shown in (2), it is completed by being bent upward in the figure for attachment to the circuit board 20 to form the attachment portion 2b.

When manufacturing the negative electrode contact piece 2 ′, the mounting portion 2 b for mounting to the circuit board 20 is changed from the state shown in FIG.
2 is bent downward in FIG. 2 to form a mounting portion 2b ′, and as shown in FIG. 3C, the tongue piece 2′a is bent by t to form a U-shaped tongue piece 2′a. It is completed by projecting inward. By protruding the tongue piece 2'a, the contact pressure with the battery can be secured.

The mounting portion 2b of the positive contact piece and the mounting portion 2b 'of the negative contact piece are fixed to a positive terminal and a negative terminal (not shown) of the circuit board 20 by solder portions 13, 13, respectively.

The positive contact piece 2 fixed to the circuit board 20
When the negative electrode contact piece 2 ′ is stored in the battery box,
As in the prior art, the battery box 15 has support plates 15d and 15b provided integrally with the movement case and support protrusions formed inside the support plates 15d and 15b, respectively, and are formed integrally with the case. This support plate 15d
The holding portions 2d, 2d of the positive electrode contact piece 2 and the negative electrode contact piece 2 '
, And the respective holding portions are supported by the support plates 15d and 15b and the support protrusions, respectively.
Can be fixed to the case.

As in the prior art, the support projections provided inside the support plate 15d are provided at a predetermined interval from each other, and are slightly larger than the width of the convex positive electrode of the battery. Is set. The support projections provided slightly inward of the support plate 15b are provided at a predetermined interval, and the tongue piece 2'a of the negative electrode contact piece 2 'is connected to the battery box from the space. It protrudes inward.

It should be noted that the tongue piece 2 'extends from the elastic tip of the tongue piece 2a.
Since the length to the elastic front end of a is set shorter than the length of the battery, when the battery is inserted into the battery box 15, the negative electrode of the battery is pressed by the tongue piece 2'a. The contact pressure between the battery and the contact piece is kept constant while preventing the battery from dropping from the battery box.

As described above, according to this example,
When the contact piece is provided with a U-shaped tongue piece 2a having elasticity and the positive electrode contact piece 2 is manufactured, the tongue piece 2a is not bent and the holding portion 2a is not bent.
d and 2d are formed in a flat plate shape when viewed from above.
When manufacturing the negative electrode contact piece 2 ', the contact pressure with the battery can be maintained by bending the tongue piece 2a'. Therefore, the tongue piece 2a of the positive electrode contact piece 2 can be bent with a simple jig to produce the negative electrode contact piece 2 '. Also,
The tongue piece 2'a of the negative electrode contact piece 2 'is U-shaped, and it is possible to prevent the negative electrode contact pieces placed in the plastic bag from being entangled with each other as much as possible, so that deformation of the contact piece can be prevented.

[0025]

As described above, according to the present invention, when manufacturing two types of contact pieces, the manufacturing jig can be simplified, the contact pieces can be prevented from being deformed, and the positive electrode contact can be prevented. The piece and the negative electrode contact piece can be made into a common component, and the negative electrode contact piece can be easily manufactured by processing the positive electrode contact piece.

[Brief description of the drawings]

FIG. 1 is a diagram showing the inside of a timepiece movement according to a specific example.

FIGS. 2A and 2B are diagrams showing a shape of a positive electrode contact piece and a shape of a negative electrode contact piece before processing in this specific example, wherein FIG. 2A is a plan view and FIG.

FIG. 3 is a view showing a state after processing the negative electrode contact piece of the specific example;
(A) is a plan view, (B) is a front view, and (C) is a side view.

FIG. 4 is a view showing the inside of a conventional watch movement.

FIG. 5 is a rear view showing a state in which a contact piece is fixed to a conventional circuit board.

FIG. 6 is a diagram showing a state in which a conventional negative electrode contact piece is mounted in a battery box.

FIG. 7 is a view showing a state in which a conventional positive electrode contact piece is mounted in a battery box.

FIG. 8 is a diagram showing a state where a battery is set in a conventional battery box.

[Explanation of symbols]

2 Positive electrode contact piece (shape before processing negative electrode piece) 2 'Negative electrode piece 2a, 2'a Tongue piece 2b, 2'b Mounting part 2d, 2'd Holding part 10 Movement for watch 13 Solder part 15 Battery box 16 Motor 20 circuit board 30 battery

Claims (1)

[Claims] 1. A battery contact piece for a positive electrode and a negative electrode mounted on a battery box, wherein the battery contact piece is a cantilever tongue which is elastically deformable with a holding portion held by the battery box. A positive contact piece having the holding portion and the tongue piece arranged on the same plane, and a negative contact piece formed by bending the tongue piece of the positive contact piece at a predetermined angle with respect to the holding portion, A battery contact piece for a battery box, comprising: