JPH1116550A - Storage block structure of rechargeable electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a storage block of a rechargeable electronic clock which can provide a reliable and stable contact structure, as well as to incorporate the same storage block in all kinds of rechargeable electronic clock and to provide the storage block at a low price, by preparing a storage block welded with a simple shaped negative lead plate (a member corresponding to the above- mentioned conductive member). SOLUTION: A secondary battery block formed by welding a simple shaped negative lead plate 2 to a second battery 1 is prepared. Consequently it can be used for all kinds of rechargeable clock in common, and the cost is reduced for welding and assembling. Also, a stable contact structure can be realized without increasing movement thickness by providing a bending part 2b at the tip of the negative lead plate 2 and pressing a contact spring 7 against the side of this bending part 2b and connecting it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure of a power storage unit of a rechargeable electronic device.

[0002]

2. Description of the Related Art In recent years, a large number of rechargeable electronic devices have been commercialized in which energy generated by self-winding power generation or a solar cell or the like is charged and driven by a storage unit such as a secondary battery or a capacitor arranged in the electronic device. ing. The connection of the electrode from the power storage unit generally employs a structure in which a lead plate is welded to a storage battery and power is supplied through the lead plate. This is to prevent the risk of the primary battery being charged and exploding due to erroneous assembly of the unchargeable primary battery.

For example, according to the method disclosed in Japanese Utility Model Publication No. 7-18125, a structure is adopted in which a contact spring is pressed in the radial direction of a storage battery to connect to a tip end of a conductive member fixed to the storage battery by welding or the like. Power is not connected if the silver battery is installed incorrectly.

[0004]

However, in the conventional example as disclosed in Japanese Utility Model Publication No. 7-18125, the connection between the contact member and the conductive member fixed to the storage battery by welding or the like is caused by pressing in the radial direction of the storage battery. In consideration of variations in welding position accuracy of the conducting member to the storage battery, etc., when the storage battery is incorporated, and in the assembled state, the contact spring and the positive electrode of the storage battery are prevented from being short-circuited, and the silver battery is incorporated. Sometimes, the tip of the conductive member fixed to the storage battery must protrude relatively large from the external shape of the storage battery so that the spring of the contact spring does not short with the external shape of the battery in a free state. The conduction member needs to be rigid in order to secure the contact pressure.

Further, since the contact portion of the conductive member is drawn out almost straight, the contact portion of the connection spring is longitudinally bent to prevent the contact with the conductive member from coming off. It is necessary to ensure a certain cross-sectional space under the storage battery so that the contact portion does not protrude from the lower surface of the movement.

Therefore, in the above-described conventional example, a structural member is greatly restricted, and it is necessary to newly provide a conductive member having a unique shape due to the arrangement of components of the movement. Therefore, the welding jig for welding the conductive member to the storage battery must also correspond to various shapes, and it is necessary to prepare many types. As a result, it takes time to switch the welding jig or the like, which increases the cost, and it is difficult to stabilize the quality in various kinds of switching work.

In addition, when automatic assembly is performed also in the movement assembling operation, different supply machines are naturally required to supply storage batteries to which conductive members having different shapes are welded. Further, as the number of types of components increases, the complexity of component management also increases. Structurally, the contact portion of the connection spring, which makes contact with the conducting member, is bent downward and protrudes in the downward direction of the movement, so that the thickness of the movement increases, making it difficult to reduce the thickness of the movement. In addition, since the connection between the connection member and the contact spring welded to the storage battery is a connection structure in the radial direction of the storage battery, the connection member welded to the storage battery has a large variation in the position in the longitudinal direction. Disadvantageous.

[0008] An object of the present invention is to solve the above-mentioned problem and to prepare an electricity storage block in which a minus lead plate having a simple shape (a member corresponding to the above-described conductive member) is welded, so that the same type of rechargeable electronic timepiece can be used. An object of the present invention is to provide an inexpensive power storage block that can be incorporated with a power storage block, and to realize a power storage block of a rechargeable electronic watch that can obtain a reliable and stable contact structure.

[0009]

In order to achieve the above object, the present invention has the following arrangement. That is, one of the positive electrode and the negative electrode of the power storage unit slightly protrudes in one direction toward the outer shape of the power storage unit in the plane direction of the power storage unit, and the tip thereof is bent substantially perpendicularly to the thickness direction of the power storage unit. Electrically connected a power storage block provided with the separated lead plate to the power storage unit so as not to be disassembled, and a composite circuit that presses the side surface of the bent end portion of the lead plate and drives the rechargeable electronic timepiece. And a connection spring.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a main part of a power storage block of an electronic timepiece according to a first embodiment of the present invention.
2 is a sectional view taken along line DD of FIG. 1, FIG. 3 is a sectional view taken along line EE of FIG. 1, and FIG. 4 is a perspective view of a secondary battery block. Reference numeral 1 denotes a secondary battery that can be repeatedly charged and discharged. Although not shown, the secondary battery 1 stores energy generated by self-winding power generation or a solar cell and serves as an energy source for driving a timepiece. The secondary battery 1 has the same button shape as a silver oxide battery used in a normal electronic timepiece. A negative lead plate 2 is resistance-welded to the negative electrode can of the secondary battery 1 to form a secondary battery block 3.

The shape of the secondary battery block 3 will be described in detail with reference to FIG. The negative lead plate 2 is resistance-welded to the negative electrode can of the secondary battery 1 at a welding point 2a. The minus lead plate 2 is slightly pulled out to the outside of the outer shape of the secondary battery 1, and the tip of the minus lead plate 2 is bent at a bent portion 2b which is bent almost perpendicularly to the positive electrode direction.
Having.

It is desirable that the amount of protrusion of the bent portion 2b from the outer shape 1c of the secondary battery be as small as possible in order to increase the versatility to other movements. The gap A is suitably set to 1.0 mm or less. However, if the gap A is set too small, there is a risk that the negative lead plate 2 and the positive electrode can of the secondary battery 1 may be short-circuited.
It is necessary to secure 0.2 mm or more in consideration of welding position accuracy and the like. Although the vertical bending amount B of the contact portion 2a is within the range of the thickness of the secondary battery 1, there is almost no problem from the viewpoint of versatility, but it is appropriate to set the range from 0.4 mm to 1.0 mm.

1 and 2, a detailed description will be given of the arrangement structure of the connecting portions of the plane and the cross section. The secondary battery block 3 is configured such that the positive electrode side 1a of the secondary battery 1 is disposed on the ground plate 4 and the secondary battery 1
The negative electrode side 1b is supported by a battery pushing plate 6 via a battery insulating sheet 5. Reference numeral 7 denotes a connection spring for establishing conduction between the negative lead plate 2 and the composite circuit 8, and is positioned by bosses 9a and 9b of a plastic spacer 9.

A contact portion 7a of the connection spring 7 for making an electrical connection with the minus lead plate 2 is bent vertically upward in the movement, and a spring portion 7b is formed on a side surface portion 2c of the bent portion 2b of the minus lead plate 2. Pressing is performed in a bent state, and conduction is established. At this time, the position of the bent portion 2b of the minus lead plate 2 in the rotation direction is regulated by the wall 9c of the spacer 9. Further, a suitable gap C between the contact portion 7a of the connection spring 7 and the outer shape 1c of the secondary battery 1 is set so as not to be short-circuited. In FIG. 3, the connection spring 7
The circuit contact spring portion 7c is bent upward at its tip and is in contact with the Vss pattern on the lower surface side of the composite circuit 8.

With the above-described structure, when the primary battery having the same shape as the secondary battery 1 is erroneously installed at the time of repair or overhaul, even if the spring portion 7b of the connection spring 7 is in a free state, the contact portion 7a remains in contact. Since it only moves in the tangential direction of the primary battery, an appropriate gap is kept with the external shape of the primary battery,
It is possible to prevent an accident such as rupture due to charging of a primary battery that cannot be electrically connected and cannot be charged.

According to the present embodiment, since the bent portion 2b of the negative lead plate 2 of the secondary battery block 3 only slightly protrudes from the secondary battery 1 by one point, the electronic timepiece according to the present embodiment Not only can it be used, but it can also be relatively easily arranged on a rechargeable electronic timepiece having another structure.
That is, the secondary battery block 3 can be made into a general-purpose component that can be used for various movements.

Further, since the bent portion 2b of the minus lead plate is bent downward in cross section, the upward bending amount of the contact portion 7a of the connection spring 7 is such that its tip is in cross section from the upper surface of the secondary battery block 3. Even if it does not extend to the position where it protrudes, the conduction with the minus lead plate 2 can be sufficiently ensured with reliability. That is, connection is possible within the thickness range of the secondary battery block 3.

[0018]

As described above, according to the present invention, one kind of power storage block can be used for various rechargeable movements. As a result, even in the operation of welding the minus lead plate to the electricity storage block, only one kind of positioning jig needs to be prepared, and furthermore, there is no need for man-hours for switching, so that the welding cost can be greatly reduced. In addition, since one type of component is produced in large quantities, it is considered that the quality is stable. In addition to welding work, there is only one kind of feeder to be incorporated into the movement, so assembly costs can be reduced. If parts are standardized, the effect on parts management including after-sales service is great.

Further, the side surface of the minus lead plate opposite to the side surface of the bent portion with which the contact portion of the contact spring comes into contact is a spacer.
Since the structure is positioned by the wall, the flat position accuracy of the bent portion of the minus lead plate can be easily obtained, the variation in contact pressure can be reduced, and a stable contact structure can be obtained. Also, since the bent portion of the negative lead plate is bent inward in the thickness direction of the secondary battery, connection with the contact spring is possible within the range of the thickness of the secondary battery block. It is possible to design a thin movement without increasing the thickness.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a movement showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line DD of FIG. 1 showing a connection portion between the minus lead plate and the contact spring according to the present invention.

FIG. 3 is a sectional view taken along the line EE of FIG. 2 showing a connection portion between the contact spring of the present invention and the composite circuit.

FIG. 4 is a perspective view of a secondary battery block according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Secondary battery 2 Negative lead plate 3 Secondary battery block 4 Ground plate 5 Insulation sheet 6 Battery pushing plate 7 Connection spring 8 Composite circuit 9 Spacer

Continuing on the front page (72) Inventor Yasuo Kitajima 6-11-12 Honcho, Tanashi-shi, Tokyo Citizen Watch Co., Ltd. Tanashi Factory (72) Inventor Kazuhide Kinoshita 435 Shimodonooka, Iida-shi, Nagano Prefecture Kazuhira Taira In the clock factory

Claims (2)

[Claims] 1. A rechargeable electronic device which is used as a driving source of an electronic device by charging energy generated by a self-winding power generator or a solar cell or the like into a button-type or coin-type power storage unit such as a secondary battery or a capacitor. , At least one of the positive electrode and the negative electrode of the power storage unit, slightly protruding only in one direction to the outer shape of the power storage unit in the radial direction of the power storage unit, and the tip thereof is bent in a thick inward direction of the power storage unit. A power storage block provided with a lead plate so as not to be disassembled, and a connection spring for pressing a side surface of a bent portion of the lead plate and electrically connecting a composite circuit for driving the rechargeable electronic device. A power storage block structure of a rechargeable electronic device, characterized by the following. 2. The power storage block structure of a rechargeable electronic device according to claim 1, wherein a gap A between an outer portion of said power storage body and a bent portion of said lead plate is set to 1 mm or less, and said lead plate is bent. A vertical bending amount B of the portion is set to be equal to or less than 1/2 of a thickness of the power storage body.