JP5822587B2 - Battery compartment and electronic equipment - Google Patents

Description

  The present invention relates to a battery storage chamber for storing a battery and an electronic device including the battery storage chamber, and more particularly to a structure of a terminal that contacts a positive electrode terminal or a negative electrode terminal of the battery.

Conventionally, a battery-driven holter electrocardiograph, a telemeter transmitter, and the like are known as devices for grasping a patient's medical condition tendency (for example, an electrocardiogram and a respiratory waveform). The battery storage chambers of these electronic devices include a positive electrode terminal that contacts the positive electrode of the battery and a negative electrode terminal that contacts the negative electrode of the battery. Hereinafter, when the positive electrode terminal and the negative electrode terminal of the battery storage chamber are not distinguished, they are referred to as electrode terminals.
When a cylindrical battery (hereinafter referred to as a battery) having a positive electrode on one end surface and a negative electrode on the other surface is applied, the positive electrode terminal and the negative electrode terminal are separated in the longitudinal direction (battery axial direction) in the battery storage chamber. Are arranged opposite each other. The battery is pressed and held between the positive terminal and the negative terminal.

  In general, a plate spring, a conical coil spring, or a torsion coil spring is used for at least one of the electrode terminals in order to hold the battery in an appropriate posture between the electrode terminals (for example, Patent Document 1). When the battery is pressed by the urging force of the spring, a good conductive connection is realized between the electrode terminal and the battery.

Japanese Patent No. 4138191

However, in the battery storage chamber in which the conical coil spring is applied to the electrode terminal, when the user performs the battery attaching / detaching work by an inappropriate technique, the electrode terminal (conical coil spring) is bent and damaged, There is a problem that the tip of the electrode terminal breaks the outer label and shorts the battery.
Further, in a battery storage chamber using a leaf spring as an electrode terminal, the urging force for pressing the battery decreases with time due to the durability of the leaf spring, and there is a problem that instantaneous interruption occurs due to vibration. is there.

  On the other hand, the battery storage chamber using the torsion coil spring for the electrode terminal disclosed in Patent Document 1 is easy to install the battery and has excellent durability. However, since the tip of the arm of the torsion coil spring protrudes outside the battery storage space when the battery is mounted in order to facilitate the battery mounting operation (see FIG. 6 of Patent Document 1), the battery is stored. Miniaturization of the chamber is impeded.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a battery storage chamber and an electronic device that can be easily mounted and can be downsized.

A battery storage chamber according to the present invention includes a storage space for storing a battery,
A positive electrode terminal in contact with the positive electrode of the battery;
A battery storage chamber that is disposed opposite to the positive electrode terminal and that contacts the negative electrode of the battery, and presses and holds the battery between the positive electrode terminal and the negative electrode terminal,
The positive terminal or the negative terminal is
A coil section;
A first arm portion extending from one end of the coil portion and supported by a peripheral wall forming the storage space;
A second arm portion extending from the other end of the coil portion and in contact with the positive electrode or negative electrode of the battery, and a torsion coil spring having
This torsion coil spring is arranged so that a load is applied in the winding direction of the coil part when inserting the battery,
The coil part moves to the peripheral wall side together with the axis of the coil part as the battery is inserted.

  An electronic apparatus according to the present invention includes the battery storage chamber described above, and a terminal voltage extracted from a battery mounted in the battery storage chamber is supplied to a power supply line.

  According to this invention, the freedom degree of design of the arm part of the torsion coil spring which comprises a positive electrode terminal or a negative electrode terminal becomes high. That is, the specification of the torsion coil spring allows the battery to be pressed and held in a stable posture, so that it is not necessary to project the arm portion outside the storage space. Therefore, the present invention has an effect that the mounting operation of the battery is easy and the size can be reduced.

It is a perspective view which shows the battery storage chamber which concerns on one embodiment of this invention. It is a longitudinal cross-sectional view in the center of the width direction of the battery storage chamber which concerns on embodiment. It is a figure which shows the other form of a battery storage chamber.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a battery storage chamber according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view at the center in the width direction of the battery storage chamber. FIG. 2A shows a state before the battery is installed, and FIG. 2B shows a state after the battery is installed.

  As shown in FIGS. 1 and 2, the battery storage chamber 1 includes a case main body 10, a positive electrode terminal 20, and a negative electrode terminal 30. The battery storage chamber 1 according to the present embodiment is mounted on a small electronic device such as a portable Holter electrocardiograph or a telemeter transmitter. A single cylindrical AA battery 50 (hereinafter referred to as a battery 50) having a battery positive electrode 51 at one end and a battery negative electrode 52 at the other end is mounted in the battery storage chamber 1.

The case main body 10 is a substantially rectangular parallelepiped box member in which four peripheral walls 11 to 14 are erected on the periphery of the bottom wall 15. The case body 10 is made of an insulating resin material (for example, a hard plastic, desirably a material having heat resistance, flame retardancy, and heat dissipation). The bottom wall 15 and the peripheral walls 11 to 14 are integrally formed by resin molding. A space surrounded by the bottom wall 15 and the peripheral walls 11 to 14 becomes a storage space 16 in which the battery 50 is stored. The battery 50 is mounted from the opening 16 a of the storage space 16.
A pair of peripheral walls 11 and 12 opposed in the longitudinal direction are referred to as a front wall 11 and a rear wall 12, respectively, and two peripheral walls 13 and 14 opposed in the short direction are referred to as side walls 13 and 14, respectively.

  In the present embodiment, the shape of the bottom wall 15 and the peripheral walls 11 to 14 is a flat plate shape, but it is desirable that these are designed according to the shape of the battery 50. For example, by making the bottom wall 15 arc-shaped in cross section and adapting to the peripheral surface of the battery 50, the battery 50 can be effectively prevented from rattling, which is also effective as a measure against instantaneous interruption. Moreover, you may make it comprise the case main body 10 in a part of housing | casing case of an electronic device.

  The negative electrode terminal 30 is disposed at one end (front wall 11 side) in the longitudinal direction of the storage space 16, and the positive electrode terminal 20 is disposed at the other end (rear wall 12 side). The battery 50 is pressed and held between the positive terminal 20 and the negative terminal 30 and is held in a stable posture. After the battery 50 is mounted in the battery storage chamber 1, the opening 16a of the storage space 16 is closed by a detachable lid member (not shown).

  In addition, an oval guide hole 17 is formed in the lower part of the side walls 13 and 14 on the front wall 11 side so as to pass through the side walls 13 and 14 in order to restrict a range in which a rotating shaft 41 to be described later moves. Yes. The guide hole 17 restricts the range in which the rotary shaft 41 can move, that is, the range in which the negative electrode terminal 30 can move, and properly maintains the attitude of the negative electrode terminal 30 when the battery 50 is not attached.

  The positive electrode terminal 20 is a terminal that contacts the battery positive electrode 51, and is fixed to the rear wall 12. The positive electrode terminal 20 is embedded in the rear wall 12 by insert molding, for example. The positive electrode terminal 20 is made of a conductive metal material (for example, copper, silver, gold, platinum, nickel, or an alloy containing at least one of these metals). A lead wire (not shown) leading to the power supply line of the electronic device is connected to the base portion 21 of the positive electrode terminal 20.

  The positive electrode terminal 20 has a bulging portion 22 protruding in a “<” shape on the storage space 16 side. For example, two notches are formed in a substantially central portion of the plate-like base portion 21, and a portion sandwiched by the notches is bulged into a “<” shape to form the bulged portion 22. The

  The top portion 22 a of the bulging portion 22 is located on the inner side of the surface on which the end surface of the convex portion 51 a of the battery positive electrode 51 is located. The top portion 22 a of the bulging portion 22 becomes a contact portion with the battery positive electrode 51.

  The top portion 22 a of the bulging portion 22 is located closer to the opening 16 a of the storage space 16 than the battery shaft (center axis of the battery 50) A when the battery 50 is mounted in the battery storage chamber 1. Specifically, the bulging portion 22 is formed so that the top portion 22 a contacts the peripheral edge of the convex portion 51 a of the battery positive electrode 51 when the battery 50 is mounted in the battery storage chamber 1. Accordingly, the battery 50 is pressed by the positive electrode terminal 20 obliquely toward the bottom wall 15, that is, not only in the horizontal direction but also in the insertion direction of the battery 50.

  Even when the position where the positive electrode terminal 20 contacts the battery positive electrode 51 is closer to the bottom wall 15 than the battery axis A, the battery is pressed obliquely toward the bottom wall 15. However, in order to hold the battery 50 in a stable posture, it is desirable that the position in contact with the battery positive electrode 51 is closer to the opening 16a than the battery axis A as described above. The same applies to a position where a negative electrode terminal 30 described later contacts the battery negative electrode 52.

The negative electrode terminal 30 is a terminal that contacts the battery negative electrode 52, and is arranged in the vicinity of the front wall 11 so as to be linearly movable in the longitudinal direction. The negative electrode terminal 30 is made of a conductive metal material, like the positive electrode terminal.
The negative terminal 30 is configured by a torsion coil spring that receives a torsional moment. Since the end surface of the battery negative electrode 52 is substantially flat, the battery 50 can be pressed and held in a stable state by a spring on the torsion coil.

  A general torsion coil spring has a coil part and two arm parts (a first arm part and a second arm part) extending from both ends of the coil part. In the present embodiment, a so-called double torsion spring in which two coil portions 31a and 31b are arranged coaxially and the first arm portions 32a and 32b are connected to each other is applied as a torsion coil spring constituting the negative electrode terminal 30. ing. Since the double torsion spring has a symmetric structure, it is suitable for holding and holding the battery 50 in a stable state.

The coil portions 31a and 31b are portions in which a single wire having a circular cross section is wound in a spiral manner with a predetermined coil diameter.
The first arm portions 32 a and 32 b are portions that extend from one end of the coil portions 31 a and 31 b and are supported by the front wall 11 that forms the storage space 16. The first arm portions 32a and 32b are connected in a “U” shape, for example.
The second arm portions 33 a and 33 b are portions that extend from the other ends of the coil portions 31 a and 31 b and come into contact with the battery negative electrode 52. The distal ends of the second arm portions 33a and 33b are bent. The bent portions 34 a and 34 b serve as contact points with the battery negative electrode 52.

In the negative electrode terminal 30, the wire diameter of the wire, the coil diameter, the number of turns, the arm length, and the free angle (when no load is applied (see FIG. 2A)) of the first arm portions 32a and 32b and the second arm portions 33a and 33b. (Relative angle), the distance between the second arm portions 33a and 33b (the distance between the contacts that contact the battery negative electrode 52), the arm length, the bending angle, and the like are appropriately designed.
These specifications include, for example, the biasing force, the biasing direction, and the contact point with the battery negative electrode 52 that are generated when the battery 50 is mounted in the battery storage chamber 1, that is, when a load is applied in the winding direction of the coil portions 31a and 31b. It is designed in consideration of the position. Further, for example, when the battery 50 is not mounted in the battery storage chamber 1, the negative electrode terminal 30 is designed to be held in an appropriate posture.

The negative electrode terminal 30 is pivotally supported by a rotation shaft 41 inserted through the coil portions 31a and 31b. The rotating shaft 41 is attached to the bearing 42 so as not to drop off.
The rotating shaft 41 and the bearing 42 are made of a conductive metal material like the negative electrode terminal 30. The rotating shaft 41 is formed so that the shaft diameter matches the coil diameter of the coil portions 31a and 31b when the battery is mounted. The bearing 42 has a base portion 42b that contacts the bottom wall 15 of the case body 10, and standing walls 42a and 42a that are formed by bending the side edge portion on one end side in the longitudinal direction of the base portion 42b. Further, a lead wire (not shown) connected to the power supply line of the electronic device is connected to the base portion 42b of the bearing 42.

Specifically, the negative electrode terminal 30 is attached to the case body 10 as follows. That is, the base portion 42b of the bearing 42 is brought into contact with the lower surface of the case body 10 so that the case body 10 is sandwiched between the standing walls 42a of the bearing 42, and the positions of the mounting holes (not shown) of the standing wall 42a and the guide holes 17 Align.
The rotary shaft 41 is inserted into a mounting hole formed in one of the standing walls 42 a of the bearing 42 and introduced into the storage space 16 through the guide hole 17. Then, the rotating shaft 41 is inserted into the coil portions 31 a and 31 b of the negative electrode terminal 30. In this state, the rotating shaft 41 is inserted through the mounting hole formed in the other upright wall 42 a of the bearing 42 through the guide hole 17 of the case body 10. And the rotating shaft 41 is fixed to the bearing 42 so that it cannot drop off.

In a state where the battery 50 is not attached, the first arm portions 32a and 32b are supported by the front wall 11 so that the negative electrode terminal 30 does not fall inside the storage space 16 (see FIG. 2A). At this time, the bent portions 34a and 34b of the second arm portions 33a and 33b are positioned on the inner side of the surface on which the end surface of the battery negative electrode 52 is positioned. On the other hand, the coil parts 31a and 31b are located outside the surface on which the end face of the battery negative electrode 52 is located.
As a result, the portion extending from the bent portions 34 a and 34 b to the tip is pressed in the insertion direction at the peripheral edge of the battery negative electrode 52 when the battery 50 is mounted. As a result, the negative electrode terminal 30 (coil portions 31 a and 31 b) moves smoothly toward the front wall 11. Therefore, the mounting operation of the battery 50 is greatly facilitated.

  Further, the bent portions 34 a and 34 b are located closer to the opening 16 a of the storage space 16 than the battery shaft A when the battery 50 is mounted in the battery storage chamber 1. Specifically, when the battery 50 is installed in the battery storage chamber 1, the second arm portion 33a, the bent portions 34a, 34b are substantially the same height as the top portion 22a of the bulging portion 22 of the positive electrode terminal 20. 33b is formed. Accordingly, the battery 50 is pressed by the negative electrode terminal 30 obliquely toward the bottom wall 15, that is, not only in the horizontal direction but also in the insertion direction of the battery 50.

  In the present embodiment, since the battery 50 is pressed against the bottom wall 15 by the positive electrode terminal 20 and the negative electrode terminal 30, the urging force and the urging direction by the positive electrode terminal 20 and the negative electrode terminal 30 are not balanced. There is a possibility that 50 may easily drop off toward the opening 16a. Therefore, it is desirable to appropriately design materials, shapes, and the like of the positive electrode terminal 20 and the negative electrode terminal 30 so that the urging force and the urging direction by the positive electrode terminal 20 and the negative electrode terminal 30 can be balanced.

  When mounting the battery 50 in the battery storage chamber 1, the user presses and inserts the battery 50 from directly above the opening 16 a with the polarity of the battery storage chamber 1 and the polarity of the battery 50 matched. Unlike the case where a conical coil spring is used for the electrode terminal, it is not necessary to insert the battery 50 obliquely.

  On the positive electrode side, the bulging portion 22 of the positive electrode terminal 20 is pressed by the convex portion 51 a of the battery positive electrode 51, and elastically deforms as the battery 50 is inserted. The battery 50 easily reaches the bottom wall 15 after the convex part 51a of the battery positive electrode 51 gets over the top part 22a of the bulging part 22.

  On the negative electrode side, the second arm portions 33 a and 33 b of the negative electrode terminal 30 are pressed by the peripheral edge of the battery negative electrode 52. As the battery 50 is inserted, the negative electrode terminal 30 (coil portions 31 a and 31 b) moves linearly toward the front wall 11. At this time, the tips of the first arm portions 32 a and 32 b slide along the front wall 11. After the coil portions 31 a and 31 b reach the front wall 11, the second arm portions 33 a and 33 b are pressed by the battery 50. At this time, a load is generated in the coil portions 31a and 31b in the winding direction.

When the battery 50 is mounted in the battery storage chamber 1, the battery 50 is pressed toward the bottom wall 15 by the positive electrode terminal 20 and the negative electrode terminal 30. Since an appropriate biasing force from the positive electrode terminal 20 and the negative electrode terminal 30 acts on the battery 50, a good conduction state is realized.
Moreover, since the urging force from the positive electrode terminal 20 and the negative electrode terminal 30 acts on the battery 50 in directions other than the horizontal direction, the battery 50 can be prevented from vibrating in the horizontal direction. Therefore, instantaneous interruption that occurs when the electronic device is carried and used can be effectively prevented.

  As described above, the battery storage chamber 1 according to the present embodiment includes the storage space 16 in which the battery 50 is stored, the positive electrode terminal 20 in contact with the battery positive electrode 51, the positive electrode terminal 20, and the battery negative electrode 52. A negative electrode terminal 30 in contact therewith. Further, the negative electrode terminal 30 extends from one end of the coil portions 31 a and 31 b, the coil portions 31 a and 31 b, and is supported by the front wall 11 forming the storage space 16, and the coil portion 31. And a second torsion coil spring having second arm portions 33a and 33b that are in contact with the battery negative electrode 52. Moreover, the torsion coil spring which comprises the negative electrode terminal 30 is arrange | positioned so that a load may be added to the winding direction of coil part 31a, 31b, when inserting the battery 50. FIG. And coil part 31a, 31b can move to the front wall 11 side in connection with inserting the battery 50. FIG.

  Thereby, the freedom degree of design of the 1st arm parts 32a and 32b and the 2nd arm parts 33a and 33b of the torsion coil spring which comprises the negative electrode terminal 30 becomes high. That is, since the battery 50 can be pressed and held in a stable posture according to the specification of the torsion coil spring, the first arm portions 32a and 32b or the second arm portions 33a and 33b are placed outside the storage space 16. There is no need to overhang. Therefore, according to the battery storage chamber 1, the battery 50 can be easily attached, and the battery storage chamber 1 can be downsized. As a result, the electronic device in which the battery storage chamber 1 is mounted can be downsized.

As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment, and can be changed without departing from the gist thereof.
For example, as shown in FIG. 3, the coil portions 31 a and 31 b of the negative electrode terminal 30 may rotate and move toward the front wall 11 as the battery 50 is inserted. In this case, for example, a locking pin 11a may be provided on the front wall 11, and the tips of the first arm portions 32a and 32b may be fixed to the locking pin 11a.

  In the embodiment, a torsion coil spring (double torsion spring) is applied to the negative electrode terminal 30, but a torsion coil spring may be applied to the positive electrode terminal 20, and both the positive electrode terminal 20 and the negative electrode terminal 30 are applied. A torsion coil spring may be applied. However, in order to prevent reverse loading of the battery 50, it is desirable that the positive electrode terminal 20 and the negative electrode terminal 30 have different shapes in appearance.

Further, a general torsion coil spring having only one coil portion can be applied to the positive electrode terminal 20 or the negative electrode terminal 30.
In the embodiment, the first arm portions 32 a and 32 b of the negative electrode terminal 30 are in contact with the battery negative electrode 52, and the second arm portions 33 a and 33 b are supported by the front wall 11 that forms the storage space 16. Also good.

  Further, the positive electrode terminal 20 and the negative electrode terminal 30 may be configured to press the battery 50 toward the side walls 13 and 14 other than the insertion direction of the battery 50. If the urging force from the positive electrode terminal 20 and the negative electrode terminal 30 acts on the battery 50 in a direction other than the horizontal direction, it is considered that the vibration in the horizontal direction is suppressed to some extent.

  Further, the guide hole 17 only needs to be able to regulate the range in which the rotating shaft 41 moves, and therefore may have a curved shape (for example, a 1/4 arc shape) instead of the linear oval shape shown in the embodiment. . In this case, as the battery 50 is inserted, the negative electrode terminal 30 (coil portions 31a and 31b) moves in a curved manner toward the front wall 11, and the tips of the first arm portions 32a and 32b slide along the front wall 11. Will be.

  Further, the present invention can be applied to a battery storage chamber for storing two or more dry batteries, and can also be applied to a battery storage chamber for storing a rechargeable secondary battery.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Battery compartment 10 Case body 11 Front wall (surrounding wall)
12 Rear wall (surrounding wall)
13 Side wall (peripheral wall)
14 Side wall (surrounding wall)
15 Bottom wall 16 Storage space 16a Opening 17 Guide hole 20 Positive terminal (leaf spring)
21 base part 22 bulging part 30 negative electrode terminal (torsion coil spring)
31a Coil part 31b Coil part 32a First arm part 32b First arm part 33a Second arm part 33b Second arm part 41 Rotating shaft 42 Bearing 42a Standing wall 42b Base part 50 Battery 51 Battery positive electrode 51a Projection part 52 Battery negative electrode

Claims (9)

A storage space for storing the battery;
A positive electrode terminal in contact with the positive electrode of the battery;
A battery storage chamber that is disposed opposite to the positive electrode terminal and that contacts the negative electrode of the battery, and presses and holds the battery between the positive electrode terminal and the negative electrode terminal,
The positive terminal or the negative terminal is
A coil section;
A first arm portion extending from one end of the coil portion and supported by a peripheral wall forming the storage space;
A second arm portion extending from the other end of the coil portion and in contact with the positive electrode or negative electrode of the battery, and a torsion coil spring having
This torsion coil spring is arranged so that a load is applied in the winding direction of the coil part when inserting the battery,
The battery storage chamber , wherein the coil part moves to the peripheral wall side together with the axis of the coil part as the battery is inserted.   The battery storage chamber according to claim 1, wherein the torsion coil spring is a double torsion spring in which the two coil portions are arranged coaxially and connected to each other.   The battery storage chamber according to claim 2, wherein the first arm portions extending from each of the two coil portions are connected to each other. The second arm portion has a bent portion that becomes a contact point with a positive electrode or a negative electrode of the battery,
The part extending from the bent portion to the tip is pressed in the battery insertion direction when the battery is mounted, and serves as a contact point with the positive electrode or the negative electrode of the battery. The battery storage chamber according to one item.   The coil part moves toward the peripheral wall as the battery is inserted, and the tip of the first arm part slides along the peripheral wall as the coil part moves. The battery storage chamber according to any one of 1 to 4.   A rotating shaft that supports the coil portion and a bearing to which the rotating shaft is attached, and the voltage of the battery is taken out from the bearing through the torsion coil spring and the rotating shaft. Item 6. The battery storage chamber according to Item 5.   The battery storage chamber according to any one of claims 1 to 5, further comprising a restricting portion that restricts a range in which the coil portion moves.   The battery storage chamber according to claim 1, wherein the positive electrode terminal is configured by the torsion coil spring.   An electronic apparatus comprising the battery storage chamber according to any one of claims 1 to 8, wherein a terminal voltage extracted from a battery mounted in the battery storage chamber is supplied to a power supply line.

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