JPH0515317U - Electrode connection mechanism for batteries - Google Patents

Abstract

(57) [Abstract] [Purpose] For portable electronic devices, etc. that can selectively use dry batteries and rechargeable batteries with recessed electrode parts, the positive electrode protrusion of the dry batteries is biased by a coil spring to establish electrical connection. An electrode connection mechanism is adopted, which provides a mechanism capable of maintaining a stable contact state against vibration or impact in the connection mechanism. [Constitution] Coil inner diameter of the tip 2 of the coil spring 1
D1 is formed to be larger than the outer diameter Da of the positive electrode protruding portion 13a of the dry battery 13, the section length e of the tip portion 2 is formed to be shorter than the height h of the positive electrode protruding portion 13a, and the coil of the intermediate portion 3 of the coil spring 1 is formed. The center diameter D2 is formed smaller than the outer diameter Da of the positive electrode protruding portion 13a, and the positive electrode protruding portion 13a of the dry battery 13 is fitted inside the tip portion 2 of the coil spring 1 to form the intermediate portion 3 and the positive electrode protruding portion 13a. To make electrical connection.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrode connection mechanism for a battery, and relates to an improvement for stabilizing a contact state when a positive electrode protrusion of a dry battery is biased by a coil spring to secure an electrical connection.

[0002]

[Prior Art]

 The portable electronic device adopts a battery-powered driving system, and a dry battery or a rechargeable battery is used as the battery. However, depending on the model, the dry battery and the rechargeable battery may be selectively used. When the dry battery and the rechargeable battery are selectively used as described above, the dry battery is of a normal type, but the rechargeable battery of the type shown in FIG. 3 is used. A positive electrode and a negative electrode are formed as recesses 11a and 11b on one end surface of the main body of the battery 11.

Further, in this case, the battery storage unit on the electronic device side can selectively store both the dry battery and the rechargeable battery, and as an example, a storage structure as shown in FIGS. have. In this example, the one rechargeable battery 11 and the two dry batteries 12 and 13 shown in FIG. 3 can be freely replaced and used. In each drawing, 14 is a housing of the electronic device, 15 is a base provided inside the housing 14, 16 is a top cover, and the side walls 14a and 14b of the housing body 14, the base 15 and the top cover 16 are shown. The enclosed space is configured as a battery storage part 17, and two coil springs 18, 19 are formed inside the one side wall part 14a so that the coil center diameter is gradually reduced from the end turn part to the tip end part. Are attached, and these are used as electrode contacts that also serve as the urging element of the battery, and two protruding terminal parts 20 and 21 are attached to the inside of the other side wall part 14b to make electrode contact for dry batteries. I have a child. Further, 16a is a fixing block made of an elastic material such as a sponge material, and plays a role of fixing the battery with the top cover 16 attached to the housing 14.

In the structure of the battery storage unit, FIG. 4 shows the storage state of the rechargeable battery, and FIGS. 5 and 6 show the storage state of the dry battery. In the rechargeable battery storage state of FIG. 4, the tip ends of the coil springs 18 and 19 are fitted in the recessed portions 11a and 11b of the rechargeable battery 11, respectively, and contact the positive electrode and the negative electrode of the rechargeable battery 11. ing. In this state, the two projecting terminal portions 20 and 21 on the side wall portion 14b side do not function as a contact. Further, in the storage state of the two dry batteries shown in FIGS. 5 and 6, the dry batteries 12 and 13 are set in the opposite directions, and the coil spring 18 serves as a negative electrode contact for the dry battery 12 and the protruding terminal portion. 20 serves as a positive electrode contact, the coil spring 19 serves as a positive electrode contact for the dry battery 13, and the projecting terminal portion 20 serves as a negative electrode contact.

[0005]

[Problems to be solved by the device]

 By the way, since portable electronic devices are frequently subjected to vibration and shock, it is necessary to stabilize the electrical contact with the battery. That is, if the connection between the battery electrode and the contact becomes unstable, contact failure often occurs and the equipment will not operate normally. Therefore, it is necessary to maintain a stable contact state.

In the storage state of the rechargeable battery 11 shown in FIG. 4 in each of the above-mentioned battery storage states, the tip end portions of the coil springs 18 and 19 and the recessed portions 11a and 11b of the rechargeable battery 11 are mutually connected due to a fitting relationship. Since it is constrained so that displacement does not occur, if the urging force of the coil springs 18 and 19 is used, a stable contact state can be maintained against vibration and shock. Further, the storage state of the dry battery 12 shown in FIG. 5 is a normal contact configuration state, the negative electrode area of the dry battery 12 is large, and the contact between the positive electrode protruding portion 12a of the dry battery 12 and the fixed protruding terminal portion 20 is large. Since the relationship is also stable, a stable contact state can be maintained only by the biasing force of the coil spring 18 and the fixing force of the fixing block 16a.

However, in the storage state of the dry battery 13 shown in FIG. 6, the outer diameter of the positive electrode protruding portion 13 a of the dry battery 13 is small and has a protruding shape, and the coil at the tip of the coil spring 19 is Since the center diameter of the rechargeable battery 11 needs to be fitted into the recess 11b of the rechargeable battery 11, the center diameter of the rechargeable battery 11 is relatively small, so that the contact condition is extremely unstable against vibration and shock. That is, even if the dry battery 13 is displaced even by a slight amount due to vibration or impact, the positive electrode protrusion 13a is easily displaced from the tip end of the coil spring 19, and the coil spring is urged. 19 is laterally distorted, and normal contact conditions cannot be obtained.

Therefore, according to the present invention, as shown in FIG. 6, when the positive electrode protrusion 13a of the dry battery 13 is biased by the coil spring 19 to electrically connect the positive electrode protrusion 13a and the coil spring 19, as shown in FIG. It was created for the purpose of providing an electrode connection mechanism that can always obtain stable electrical contact conditions even when there is vibration or shock.

[0009]

[Means for Solving the Problems]

 The present invention relates to an electrode connection mechanism for electrically connecting a positive electrode protrusion of a dry battery with a coil spring to electrically connect the positive electrode protrusion to the coil spring. The outer diameter of the battery is larger than the outer diameter of the positive electrode protrusion of the dry battery, and the section length of the tip is shorter than the height of the positive electrode protrusion of the dry battery. The present invention relates to an electrode connection mechanism for a battery, which is formed small and is formed by gradually increasing the coil center diameter of the main body portion that is continuous from the intermediate portion to the rear end portion.

[0010]

[Action]

 In the present invention, the positive electrode protrusion of the dry battery can be fitted inside the tip portion of the coil spring, and can be brought into contact with the tip surface of the positive electrode protrusion in the middle portion of the coil spring. Therefore, if the pressing relationship between the intermediate portion and the positive electrode protrusion of the dry battery is maintained by the urging force of the main body and the intermediate portion of the coil spring, it is possible that the tip of the coil spring surrounds the positive electrode protrusion of the dry battery. As a result, the lateral displacement of the positive electrode protrusion can be constrained so that normal electrical contact conditions between the middle part of the coil spring and the positive electrode protrusion of the dry battery can be maintained at all times even if there is vibration or shock. ..

[0011]

【Example】

 Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 corresponds to the storage state of the dry battery of FIG. 6, and the special coil spring 1 according to the present invention is attached to the side wall portion 14a of the housing 14 to secure the electrical contact condition with the dry battery 13. It is an important section sectional view showing the state where it is made.

The coil spring 1 is coiled such that the coil inner diameter D1 of the tip portion 2 is larger than the outer diameter Da of the positive electrode protruding portion 13a of the dry battery 13, and the section length e of the tip portion 2 is the positive electrode protrusion described above. It is shorter than the height h of the portion 13a. Further, the coil spring 1 has an intermediate portion 3 continuously coiled from the above-mentioned tip portion 2, and the coil center diameter D2 at this intermediate portion 3 is the outer diameter of the positive electrode protruding portion 13a of the dry battery 13. It is smaller than Da. Further, the coil spring 1 is coiled so that the coil center diameter gradually increases from the intermediate portion 3 to the end turn portion 4, and this portion is referred to as a main body portion 5 here.

When the coil spring 1 having such a configuration is attached to the side wall portion 14a of the housing 14 and the dry battery 13 is stored as shown in FIG. 1, the positive electrode protrusion 13a of the dry battery 13 has a dimension of D1> Da. Based on the relationship, the coil spring 1 is fitted inside the tip portion 2 and the positive electrode protrusion 13a of the dry battery 13 is connected to the side surface of the intermediate portion 3 of the coil spring 1 based on the dimensional relationship of e <h and D2 <Da. Contact. Further, when the dry battery 13 is stored, the main body portion 5 and the intermediate portion 3 of the coil spring 1 are compressed and the side surface of the intermediate portion 3 is biased toward the dry battery 13 side. The part is kept pressed.

By the way, when vibration or impact is applied to the housing body 14, even if the dry battery 13 is fixed by the fixing block 16a such as a sponge material as shown in FIG. 6, the dry battery 13 is displaced. It may happen. In such a case, according to the mechanism of the present embodiment, the positive electrode protruding portion 13a of the dry battery 13 is surrounded by the tip portion 2 of the coil spring 1, and the coil is not affected by the displacement of the positive electrode protruding portion 13a. By engaging the inner peripheral surface of the tip portion 2 of the spring 1, it is possible to prevent the joining condition between the positive electrode protruding portion 13a and the intermediate portion 3 of the coil spring 1 from being lost. That is, the coil spring 1 suppresses the displacement of the dry battery 13, prevents the positive electrode protrusion 13a from being displaced as it is even if the dry battery 13 is displaced, and always maintains stable electrical contact conditions. In FIG. 1, 6 is a leaf spring retainer spring attached to the side wall portion 14a of the main body casing 14. By adding this retainer spring for fixing the battery, the retainer spring is protected against external vibration and impact. Therefore, more stable contact conditions can be maintained.

On the other hand, FIG. 2 shows a state in which the rechargeable battery 11 is stored, and corresponds to the storage state shown in FIG. Here, if the coil outer diameter D3 of the tip portion 2 of the coil spring 1 according to this embodiment is set to be smaller than the inner diameter Db of the recess 11b of the charging pond 11, the tip portion 2 is fitted inside the recess 11b. Therefore, the tip portion 2 can be pressed against the positive electrode side of the rechargeable battery 11 to obtain stable electrical contact. That is, the dimensional condition Da <D1 in FIG. 1 and the dimensional condition D3 <Db in FIG. 2 enable the coil spring 1 to realize a stable positive electrode connection to both the dry battery 13 and the rechargeable battery 11.

[0016]

[Effect of the device]

 As described above, the present invention provides an electrode connection mechanism for electrically connecting the positive electrode protrusion of the dry battery to the coil spring by urging the positive electrode protrusion of the dry battery with the coil spring. By setting a special coiling diameter according to the dimensional relationship with the positive electrode protrusion of the dry battery, a stable contact state is maintained against vibration and shock, and the reliability of electronic devices is improved. Further, the present invention is most suitable for an electronic device that selectively uses a rechargeable battery having an electrode as a recess and a normal dry battery as a power battery, and enables stable electrical connection to any battery. ..

[Brief description of drawings]

FIG. 1 is a view showing an electrode connection mechanism for a battery according to an embodiment of the present invention (a cross-sectional view of a main part of a battery storage part).

FIG. 2 is a diagram (a cross-sectional view of a main part of a battery storage unit) showing an electrode connection mechanism when a rechargeable battery is stored.

FIG. 3 is a perspective view of a rechargeable battery.

FIG. 4 is a cross-sectional view of a battery storage unit showing a case where a rechargeable battery is stored by an electrode joining mechanism according to a conventional technique.

FIG. 5 is a cross-sectional view of a battery storage unit showing a case where a dry battery is stored by an electrode joining mechanism according to a conventional technique (a state in which a negative electrode and a coil spring are in contact with each other).

FIG. 6 is a cross-sectional view of a battery storage unit showing a case where a dry battery is stored by an electrode joining mechanism according to a conventional technique (a state where a positive electrode and a coil spring are in contact with each other).

[Explanation of symbols]

1 ... Coil spring, 2 ... Tip part, 3 ... Intermediate part, 4 ...
End turn part, 5 ... Main body part, 11 ... Rechargeable battery, 11b ... Recessed part, 13 ...
Dry battery, 13a ... Positive electrode protrusion, 14 ... Housing, 14a ... Side wall, 15
… Base, D1… Coil inner diameter at tip, D2… Coil center diameter at middle, D3… Coil outer diameter at tip, Da… Outer diameter of positive electrode protrusion, Db… Inner diameter of recess, e… At tip Section length, h ... Height of positive electrode protrusion.

Claims (1)

[Scope of utility model registration request] 1. An electrode connecting mechanism for electrically connecting a positive electrode protrusion of a dry battery with a coil spring to electrically connect the positive electrode protrusion to the coil spring, wherein a coil inner diameter at a tip portion of the coil spring is defined as a positive electrode protrusion of the dry battery. The diameter of the section of the tip is shorter than the height of the positive electrode protrusion of the dry battery, and the coil center diameter of the intermediate portion continuous from the tip is larger than the outer diameter of the positive electrode protrusion of the dry battery. An electrode connection mechanism for a battery, which is formed to be small and is formed by gradually increasing a coil center diameter of a main body portion that is continuous from the intermediate portion to the rear end portion.