JP2020098673A - Battery case - Google Patents

Abstract

To provide a battery case capable of preventing reverse insertion of a battery without attaching a reverse insertion preventive component to a battery elastic contact terminal, and securing a contact pressure required for the battery.SOLUTION: A battery case comprises: an accommodation part S1 in which a columnar battery 61 is accommodated; an anode-side terminal (terminal plate 51) disposed on one bottom of the accommodation part in contact with a negative pole terminal 61b; a cathode-side elastic terminal 30 of an elastic body disposed on the other bottom of the accommodation part in contact with a positive pole terminal 61a; and a reverse insertion preventive component 20 which is disposed between the positive pole side elastic terminal and the battery accommodated in the accommodation part, and slidable in a length direction D of the accommodation part S1. The reverse insertion preventive component includes: an abutment surface (front abutment surface 21a) which can be abutted with the negative pole terminal; and an opening 25 capable of inserting the positive pole terminal in the vicinity of the abutment surface. When accommodating the battery in the accommodation part while abutting the negative pole terminal to the abutment surface, the positive pole side elastic terminal is pushed by a back face of the reverse insertion preventive component and elastically deformed to a position where the positive pole side elastic terminal does not protrude from the abutment surface.SELECTED DRAWING: Figure 7

Description

The present invention relates to a battery case that accommodates a cylindrical battery (for example, an AA battery).

Conventionally, it is known that a battery case is provided with a reverse difference prevention component so that an electrical connection is not formed due to incorrect attachment of positive and negative electrodes of a battery (for example, refer to Patent Document 1).

JP, 2008-60052, A

Patent Document 1 discloses a configuration in which an insulating member having a penetration area is fixed on the first elastic arm of the battery elastic contact terminal. As a result, when the protruding positive electrode of the battery comes into contact with the battery elastic contact terminal, the protruding positive electrode comes into contact with the contact piece of the first elastic arm to form an electrical connection, and the user mistakes the direction of inserting the battery. In this case, the flat negative electrode of the battery is blocked by the insulating member, so that an electrical connection with the battery elastic contact terminal is not formed.

However, the configuration described in Patent Document 1 has a problem that a troublesome assembly work for attaching a fine insulating member to the battery elastic contact terminal occurs.

Therefore, an object of the present invention is to provide a battery case capable of preventing reverse difference of a battery and securing a contact pressure required for the battery without attaching the reverse difference prevention component to the battery elastic contact terminal.

In order to achieve the above-mentioned object, a battery case of the present invention is arranged in a housing portion for housing a cylindrical battery having a convex positive electrode terminal and a negative electrode terminal, and in one bottom portion of the housing portion. A negative electrode side terminal in contact with the negative electrode terminal, a positive electrode side elastic terminal of an elastic body arranged in the other bottom portion of the accommodating portion and in contact with the positive electrode terminal, the positive electrode side elastic terminal, A reverse difference prevention component that is slidable in the longitudinal direction of the accommodation part and that is arranged between the battery accommodated in the accommodation part and the reverse difference prevention part that can contact the negative electrode terminal. A contact surface, and an opening into which the positive electrode terminal can be inserted in the vicinity of the contact surface, and when the negative electrode terminal is brought into contact with the contact surface to be housed in the housing portion, The positive electrode side elastic terminal is pushed by the back surface of the reverse difference prevention component and elastically deforms to a position where it does not project from the contact surface.

In the battery case of the present invention thus configured, it is possible to prevent the reverse difference of the battery and secure the contact pressure necessary for the battery without attaching the reverse difference preventing component to the battery elastic contact terminal.

3 is a perspective view showing a configuration of a battery case of Example 1. FIG. FIG. 3 is a perspective view showing a case main body according to the first embodiment. It is a perspective view which expands and shows a part of case main body of Example 1. FIG. 3 is an exploded perspective view showing a reverse difference prevention product and a positive electrode side elastic terminal of the first embodiment. 5 is a cross-sectional view showing the battery case of Example 1. FIG. 3 is a cross-sectional view showing a state in which a battery is accommodated in the battery case of Example 1 in a correct orientation. FIG. 3 is a cross-sectional view showing a state in which a battery is accommodated in the battery case of Example 1 in an incorrect orientation. FIG. 5 is a cross-sectional view showing a battery case of Example 2. FIG. FIG. 6 is a cross-sectional view showing a battery case of Example 3.

Hereinafter, an embodiment for realizing a battery case according to the present invention will be described based on Examples 1 to 3 shown in the drawings.

The battery case according to the first embodiment is applied to an electronic device that uses two AA type batteries as a power source.

[Battery case configuration]
FIG. 1 is a perspective view showing the configuration of the battery case of the first embodiment. Hereinafter, the configuration of the battery case according to the first embodiment will be described with reference to FIG.

As shown in FIG. 1, the battery case 1 includes a case body 10, a cover 2 attached to the case body 10, and a lid member 50.

Inside the battery case 1, housing parts S1 and S2 for housing two cylindrical batteries 61 are formed. The battery 61 is, for example, an AA type battery or a AAA type battery. The housing portions S1 and S2 have an opening 4 into which the battery 61 can be inserted. The battery 61 is accommodated by being inserted into the accommodating portions S1 and S2 from the longitudinal end of the battery 61 through the opening 4.

One battery 61 is inserted into the accommodation portion S1 through the opening 4 from the side of the convex positive electrode terminal 61a. The other battery 61 is inserted into the accommodation portion S2 from the negative electrode terminal 61b side through the opening 4. This enables the electronic device to operate.

The lid member 50 is movable via the hinge portion 5 between a closed position where the opening 4 is covered and an open position where the opening 4 is opened. In the closed position, the lid member 50 may be slid to provide a lock mechanism for fixing the lid member 50 to the case body 10 and the cover 2. The lid member 50 in the closed position constitutes one bottom portion of the storage portions S1 and S2.

A terminal plate 51 as a negative electrode side terminal is attached to the inner surface of the lid member 50. The terminal board 51 is formed of a conductive metal. The terminal plate 51 has two protrusions 52 and 53. The projecting portions 52 and 53 can contact the positive electrode terminal 61a and the negative electrode terminal 61b of the battery 61 when the battery 61 is housed in the housing parts S1 and S2 and the lid member 50 is in the closed position.

In addition, the longitudinal direction of the accommodation portion S1 is referred to as a longitudinal direction D. In the first embodiment, the longitudinal direction D is the insertion/removal direction in which the battery 61 is inserted/removed. Further, a direction in which the battery 61 is removed is a front direction F, and a direction in which the battery 61 is inserted is a rear direction B.

[Structure of reverse difference prevention structure]
FIG. 2 is a perspective view showing the case body 10 of the first embodiment. FIG. 3 is an enlarged perspective view showing a part of the case body 10 of the first embodiment. FIG. 4 is an exploded perspective view showing the reverse difference prevention product and the positive electrode side elastic terminal of the first embodiment. FIG. 5 is a cross-sectional view showing the battery case 1 of the first embodiment. Hereinafter, the configuration of the reverse difference prevention structure according to the first embodiment will be described with reference to FIGS.

(Case body)
As shown in FIGS. 2 to 4, a reverse difference prevention component 20, a positive side elastic terminal 30, and a conical coil spring negative side elastic terminal 40 are attached to the case body 10.

The positive electrode side elastic terminal 30 is arrange|positioned at the edge part on the opposite side to the opening 4 of the accommodating part S1. That is, the positive electrode side elastic terminal 30 is arranged at the other bottom portion of the housing portion S1. The negative elastic terminal 40 is arranged at the end of the accommodation portion S2 opposite to the opening 4. That is, the negative elastic terminal 40 is arranged at the other bottom portion of the housing portion S1.

The reverse difference prevention component 20 is arranged between the positive electrode side elastic terminal 30 and the battery 61 housed in the housing part S1. The reverse difference prevention component 20 is arranged in the recessed portion 11 in which the bottom surface of the case body 10 is recessed.

(Reverse-difference prevention component)
The reverse difference prevention component 20 is formed as an insulator by using, for example, resin. As shown in FIG. 4, the reverse difference prevention component 20 includes a main body portion 21, a sleeve portion 22 that projects laterally from the main body portion 21, and a lower side of the main body portion 21 that extends from the main body portion 21 in the forward direction F. And a leg portion 23 that does.

On the front surface side of the main body portion 21, a front contact surface 21 a is formed as a contact surface that can contact the peripheral portion of the positive electrode terminal 61 a of the battery 61 or the negative electrode terminal 61 b of the battery 61. The front contact surface 21 a is formed in a frame shape so as to form an opening 25 near the center of the main body 21.

The opening portion 25 is formed in a size such that the positive electrode terminal 61a of the battery 61 can be inserted, but the negative electrode terminal 61b of the battery 61 cannot be inserted.

As shown in FIGS. 4 and 5, the upper surface of the main body portion 21 is provided with two upper sliding portions 21f that come into contact with the lower surface 2a of the cover 2. The upper sliding portion 21f is formed as a convex portion extending in the longitudinal direction D and having a semicircular cross section. That is, the upper sliding portion 21f is slidably formed on the upper surface of the accommodation portion S1.

As shown in FIGS. 3 and 4, the sleeve portion 22 is provided slightly above the center of the main body portion 21 in the vertical direction. The sleeve portion 22 is formed so as to project laterally from both side surfaces of the main body portion 21.

The lower surface of one of the sleeve portions 22 is provided with two lateral sliding portions 22a that come into contact with the upper surface 12a of the side wall 12 as a vertical wall of the case body 10. The lower surface of the other sleeve portion 22 is provided with two lateral sliding portions 22a that come into contact with the upper surface 13a of the central wall 13 as a vertical wall of the case body 10. The side sliding portion 22a is formed as a convex portion having a semicircular cross section that extends in a direction perpendicular to the longitudinal direction D. That is, the upper sliding portion 21f is slidably formed on the vertical wall of the accommodation portion S1. Note that the cover 2 may be provided with a restriction rib that restricts the vertical movement of the sleeve portion 22.

As shown in FIGS. 4 and 5, two leg portions 23 are formed on the lower side of the main body portion 21. The lower surface of each leg portion 23 is provided with a lower sliding portion 23a that comes into contact with the bottom surface 11a of the recess 11 of the case body 10. The lower sliding portion 23a is formed as a convex portion having a semicircular cross section that extends in the longitudinal direction D. That is, the lower sliding portion 23a is slidably formed on the lower surface of the accommodation portion S1.

The reverse-difference prevention component 20 thus configured is slidable in the longitudinal direction D while being supported by the upper sliding portion 21f, the side sliding portions 22a, and the lower sliding portion 23a. Further, the reverse difference prevention component 20 is restricted from moving in the forward direction F by a step-like stopper portion 12b provided on the side wall 12 of the case body 10 and a step-like stopper portion 11b provided in the recess 11. It is supposed to be done.

As shown in FIG. 5, the rear surface side (rear surface side) of the main body portion 21 includes, as a rear surface, a first rear surface 21b and a second rear surface 21c formed rearward of the first rear surface 21b.

The first rear surface 21b is formed below the opening 25. The second rear surface 21c is formed above and below the opening 25. The angled portion 21d of the first rear surface 21b can be brought into contact with an inclined portion 33a of the positive electrode side elastic terminal 30 described later. The first rear surface 21b may not be provided, and the second rear surface 21c may be brought into contact with the inclined portion 33a of the positive-side elastic terminal 30 described later.

(Positive side elastic terminal)
The positive electrode side elastic terminal 30 is formed of a metal having conductivity. The length of the terminal plate 51 as the negative electrode side terminal in the longitudinal direction D is formed to be shorter than the length of the positive electrode side elastic terminal 30 in the longitudinal direction D. As shown in FIG. 4, the positive electrode side elastic terminal 30 has a plate-shaped terminal body 31, two first elastic portions 32 extending from the lower side of the terminal body 31, and a lower side of the terminal body 31. One second elastic portion 33 and a connecting portion 35 extending from the upper side of the terminal body 31 are provided.

The terminal body 31 is formed in a plate shape. The first elastic portion 32 is formed by bending a strip-shaped plate so as to have elasticity. The first elastic portions 32 are provided near both ends in the width direction of the positive electrode side elastic terminal 30.

The second elastic portion 33 is provided between the two first elastic portions 32. The second elastic portion 33 is formed by bending a strip-shaped plate having a width shorter than the width of the opening 25 and has elasticity.

The 2nd elastic part 33 is provided with the inclination part 33a, the front-end|tip part 33b, and the bending part 33c, as shown in FIG.4 and FIG.5.

The inclined portion 33a is formed so as to be inclined in the front direction F with respect to the vertical direction from the starting point of bending the strip-shaped plate. The tip portion 33b is formed so as to extend substantially upward from the tip of the inclined portion 33a via the curved portion 33c.

The connection portion 35 extends from the upper end of the terminal body 31 in the rearward direction B and is connected to a control board that controls the electronic device by an electric wire or the like (not shown).

As shown in FIG. 5, the positive elastic terminals 30 are attached to the case body 10 by fitting the first elastic portions 32 into the groove portions 11 c formed in the case body 10. When the positive electrode side elastic terminal 30 is attached to the case body 10, the inclined portion 33a, the tip end portion 33b, and the curved portion 33c are inserted into the opening 25.

[Battery insertion operation]
FIG. 6 is a cross-sectional view showing a state where the battery 61 is accommodated in the battery case 1 of the first embodiment in the correct orientation. FIG. 7 is a cross-sectional view showing a state where the battery 61 is accommodated in the battery case 1 of the first embodiment in the wrong orientation. Hereinafter, the operation of the first embodiment when inserting the battery will be described with reference to FIGS. 6 and 7.

(When batteries are installed in the correct orientation)
When the battery 61 is inserted into the accommodating portion S1 from the convex positive electrode terminal 61a side of the battery 61 through the opening 4, the positive electrode terminal 61a abuts the curved portion 33c of the positive electrode side elastic terminal 30.

When the positive electrode terminal 61a is in contact with the curved portion 33c of the positive electrode side elastic terminal 30 and the battery 61 is further pushed, as shown in FIG. It is pushed by the child 61a and elastically deforms in the backward direction B. At this time, the reverse difference prevention component 20 is pushed by the outer peripheral edge (end surface) of the positive electrode terminal 61a of the battery 61 and slides in the backward direction B. Then, the lid member 50 is set to the closed position in which the lid 4 is covered.

As a result, the battery 61 is electrically connected to the positive electrode side elastic terminal 30 and the terminal plate 51.

(When batteries are installed in the wrong orientation)
When the battery 61 is inserted into the housing portion S1 from the negative electrode terminal 61b side of the battery 61 through the opening 4, the negative electrode terminal 61b contacts the front contact surface 21a of the reverse difference prevention component 20.

When the negative electrode terminal 61b is in contact with the front contact surface 21a of the reverse difference prevention component 20, when the battery 61 is further pushed in, the reverse difference prevention component 20 slides in the backward direction B as shown in FIG. At this time, the inclined portion 33a of the second elastic portion 33 of the positive electrode side elastic terminal 30 is pushed in the rearward direction B while being in contact with the corner portion 21d of the first rear surface 21b of the reverse difference prevention component 20, and the positive electrode side elastic terminal 30. The second elastic portion 33 is elastically deformed.

In this state, the second elastic portion 33 of the positive electrode side elastic terminal 30 is in a position where it does not protrude from the opening 25 of the reverse difference prevention component 20. Further, even if the lid member 50 is set to the closed position, the convex positive electrode terminal 61a interferes and the lid member 50 cannot be set to the closed position.

As a result, the battery 61 is not electrically connected to the positive elastic terminal 30 and the terminal plate 51.

[Operation of battery case]
The operation of the battery case 1 of the first embodiment will be described. The battery case 1 according to the first embodiment is arranged in a housing S1 in which a cylindrical battery 61 having a convex positive electrode terminal 61a and a negative electrode terminal 61b is housed, and one bottom of the housing S1. A negative electrode side terminal (terminal plate 51) that contacts the negative electrode terminal 61b, a positive electrode side elastic terminal 30 of an elastic body that is disposed on the other bottom of the housing S1 and that contacts the positive electrode terminal 61a, and a positive electrode side elastic terminal. 30 and the reverse difference prevention component 20 which is arranged between the battery 61 accommodated in the accommodation unit S1 and is slidable in the longitudinal direction D of the accommodation unit S1. The reverse difference prevention component 20 includes the negative electrode terminal 61b. And a contact surface (front contact surface 21a) capable of contacting with, and an opening 25 into which the positive electrode terminal 61a can be inserted in the vicinity of the contact surface (front contact surface 21a), and the negative electrode terminal 61b. The positive electrode side elastic terminal 30 is pushed by the back surface of the reverse-difference prevention component 20 to bring the contact surface (the front contact surface 21a) into contact with the contact surface (the front contact surface 21a). It elastically deforms to a position where it does not protrude from the surface 21a) (FIG. 7).

As a result, when the positive electrode terminal 61a of the battery 61 is accommodated in the accommodation portion S1 with the attitude facing the reverse difference prevention component 20, the positive electrode terminal 61a is inserted into the opening 25 and brought into contact with the positive elastic terminal 30. You can Then, in this state, a necessary contact pressure can be secured to the battery 61 by the compressed elastic force of the positive electrode side elastic terminal 30.

On the other hand, when the negative electrode terminal 61b of the battery 61 is accommodated in the accommodation portion S1 with the posture facing the reverse difference prevention component 20, the negative electrode terminal 61b is brought into contact with the contact surface (the front contact surface 21a) so as to have a negative polarity. The child 61b can be brought out of contact with the positive elastic terminal 30. Therefore, the reverse difference prevention of the battery 61 can be prevented and the contact pressure required for the battery 61 can be secured with a simple configuration without attaching the reverse difference prevention component 20 to the positive electrode side elastic terminal 30.

In the battery case 1 of Example 1, the negative electrode side terminal (terminal plate 51) is attached to the lid member 50 that covers the opening 4 of the accommodation part S1, and the negative electrode side terminal (terminal plate) in the longitudinal direction D of the accommodation part S1. The length of 51) is shorter than that of the positive-side elastic terminal 30 (FIG. 7).

This makes it possible to prevent the negative electrode side terminal (terminal plate 51) from getting in the way when the lid member 50 is opened and closed to replace the battery 61. Therefore, the replaceability of the battery 61 by the user can be improved.

Further, when the negative electrode terminal 61b of the battery 61 is accommodated in the accommodation portion S1 with the posture facing the reverse difference prevention component 20, the battery 61 projects from the accommodation portion S1 by the amount of the convex positive electrode terminal 61a. .. Therefore, when the negative electrode terminal 61b of the battery 61 is accommodated in the accommodating portion S1 with the posture facing the reverse difference prevention component 20, the lid member 50 can be prevented from closing. As a result, the user can notice the incorrect attachment of the battery 61 at an early stage.

In the battery case 1 of the first embodiment, the positive electrode side elastic terminal 30 is a leaf spring having an inclined portion 33a capable of contacting the back surface (first rear surface 21b) of the reverse difference prevention component 20 (FIG. 4).

As a result, when the negative electrode terminal 61b of the battery 61 is accommodated in the accommodation portion S1 with the posture facing the reverse difference prevention component 20, the negative electrode terminal 61b is brought into contact with the contact surface (front contact surface 21a), and the reverse difference The leaf spring can be elastically deformed by pushing the inclined portion 33a on the back surface (first rear surface 21b) of the prevention component 20. Therefore, with a simple configuration, it is possible to prevent the reverse difference of the battery 61 and ensure the contact pressure required for the battery 61.

In the battery case 1 of the first embodiment, the reverse difference prevention component 20 includes the lower sliding portion 23a slidable on the lower surface of the housing S1 (bottom surface 11a of the recess 11) and the upper surface of the housing S1 (lower surface of the cover 2). 2a) has an upper sliding part 21f slidable, and a lateral sliding part 22a slidable on a vertical wall (side wall 12, central wall 13) on the side of the reverse difference prevention component 20 of the housing S1. Prepare (Fig. 4).

Thereby, the reverse difference prevention component 20 can be moved in a stable posture with respect to the accommodation portion S1. Therefore, the reverse difference prevention component 20 can be smoothly moved in the accommodation portion S1. As a result, it is possible to stably prevent the reverse difference of the battery 61 and to secure the contact pressure required for the battery 61.

The battery case of the second embodiment differs from the battery case of the first embodiment in that the elastic terminal on the positive electrode side is different.

[Structure of positive electrode side elastic terminal]
FIG. 8 is a sectional view showing the battery case of the second embodiment. Hereinafter, the configuration of the positive electrode side elastic terminal of the second embodiment will be described with reference to FIG. In addition, description of the same or equivalent portions as the contents described in the first embodiment will be made using the same terms or the same reference numerals.

The second elastic portion 133 of the positive electrode side elastic terminal 130 of the second embodiment includes an inclined portion 133a, a tip portion 133b, and a curved portion 133c, as shown in FIG.

The inclined portion 33a is formed so as to be inclined in the front direction F with respect to the vertical direction from the starting point of bending the strip-shaped plate. The tip portion 33b is formed so as to extend substantially upward from the tip of the inclined portion 33a via the curved portion 33c.

When the positive electrode side elastic terminal 130 is attached to the case body 10, the inclined portion 133a, the tip portion 133b, and the curved portion 133c are inserted into the opening 25. The tip portion 133b can contact the corner portion 21e of the second rear surface 21c.

As described above, even in the configuration in which the tip portion 133b of the positive electrode side elastic terminal 130 abuts the corner portion 21e of the second rear surface 21c, the same operational effect as that of the first embodiment is exhibited.

The rest of the configuration, functions and effects are substantially the same as those of the above-mentioned embodiment, so the description thereof is omitted.

The battery case of the third embodiment differs from the battery case of the first embodiment in that the elastic terminal on the positive electrode side is different.

[Structure of positive electrode side elastic terminal]
FIG. 9 is a cross-sectional view showing the battery case of the third embodiment. Hereinafter, the configuration of the positive electrode side elastic terminal of the third embodiment will be described with reference to FIG. In addition, description of the same or equivalent portions as the contents described in the first embodiment will be made using the same terms or the same reference numerals.

The positive electrode side elastic terminal 230 of the third embodiment is formed of a conductive metal as a compression spring. The length of the terminal plate 51 as the negative electrode side terminal in the longitudinal direction D is formed to be shorter than the length of the positive electrode side elastic terminal 230 in the longitudinal direction D.

As shown in FIG. 9, the positive electrode side elastic terminal 230 includes a large diameter portion 231 having a diameter larger than the opening 25 of the reverse difference prevention component 20, a small diameter portion 232 having a diameter smaller than the opening 25, and a connecting portion 235. It is a compression spring provided.

The end of the large diameter portion 231 can be brought into contact with the second rear surface 21c of the reverse difference prevention component 20. The small diameter portion 232 is located at a position where it does not project from the opening 25 of the reverse difference prevention component 20.

[Operation of battery case]
The operation of the battery case 1 of the third embodiment will be described. In the battery case 1 of the third embodiment, the positive electrode side elastic terminal 230 is a compression spring including a large diameter portion 231 having a diameter larger than the opening 25 and a small diameter portion 232 having a diameter smaller than the opening 25 (FIG. 9). ..

As a result, when the positive electrode terminal 61a of the battery 61 is accommodated in the accommodation portion S1 with the posture facing the reverse difference preventing component 20, the positive electrode terminal 61a is inserted into the opening 25 and the small diameter portion 232 of the positive elastic terminal 230 is inserted. Can be contacted with. In this state, the contact force required for the battery 61 can be secured by the elastic force of the compressed positive electrode side elastic terminal 230.

On the other hand, when the negative electrode terminal 61b of the battery 61 is accommodated in the accommodation portion S1 with the posture facing the reverse difference prevention component 20, the negative electrode terminal 61b is brought into contact with the contact surface (the front contact surface 21a) so as to have a negative polarity. The child 61b can be brought out of contact with the elastic terminal 230 on the positive electrode side. Therefore, with a simple configuration, it is possible to prevent the reverse difference of the battery 61 and ensure the contact pressure required for the battery 61.

The rest of the configuration, functions and effects are substantially the same as those of the above-mentioned embodiment, so the description thereof is omitted.

The battery case of the present invention has been described above based on the first to third embodiments. However, the specific configuration is not limited to these examples, and the combination of each example, the design change, and the like, as long as the gist of the invention according to each claim of the claims is not deviated. Additions are allowed.

In Examples 1 to 3, an example in which the opening 25 of the reverse difference prevention component 20 is a through hole is shown. However, the opening may be a notch.

In Examples 1 to 3, an example in which the battery 61 is an AA type battery or a AAA type battery is shown. However, the battery may be a cylindrical battery.

In the first and second embodiments, the positive side elastic terminals 30 and 130 are leaf springs, and in the third example, the positive side elastic terminals 230 are compression springs. However, the positive-side elastic terminal may be any terminal that applies an elastic force in the forward direction F.

In the first and second embodiments, examples in which the tip end portions 33b and 133b of the second elastic portions 33 and 133 are configured to face upward have been shown. However, the tip end portion of the second elastic portion is not limited to this aspect and may be configured to face downward.

In Examples 1 to 3, the battery 61 is housed by being inserted into the housing parts S1 and S2 from the longitudinal end of the battery 61 through the opening 4. However, the battery 61 may be housed in the housing parts S1, S2 from above the case body 10.

In Examples 1 to 3, the battery case 1 includes the lid member 50. However, as the battery case 1, instead of providing the lid member 50, a wall may be provided.

In the third embodiment, the positive electrode side elastic terminal 230 has an example in which the large diameter portion 231 having a diameter larger than the opening portion 25 and the small diameter portion 232 having a diameter smaller than the opening portion 25 are shown. However, it is not necessary to provide the small diameter portion as the positive electrode side elastic terminal. In this case, the positive electrode terminal 61a is brought into contact with the large diameter portion. Thereby, it is possible to prevent the reverse difference of the battery 61 and to secure the contact pressure required for the battery 61.

Examples 1 to 3 show examples in which the present invention is applied to the battery cases 1 and 101 in which the batteries 61 are arranged in parallel. However, the present invention can be applied to a battery case in which the batteries 61 are arranged in series.

Examples 1 to 3 show examples in which the present invention is applied to an electronic device that uses two batteries as a power source. However, the present invention can be applied to an electronic device that uses one battery or three or more batteries as a power source.

DESCRIPTION OF SYMBOLS 1 Battery case 4 Opening 20 Reverse difference prevention component 21a Front contact surface (an example of contact surface)
21b First rear surface (one example of rear surface)
21f Upper sliding part 22a Side sliding part 23a Lower sliding part 25 Opening 30 Positive side elastic terminal 33a Inclined part 51 Terminal plate (an example of negative side terminal)
50 Lid member 61 Battery 61a Positive electrode terminal 61b Negative electrode terminal 230 Positive electrode side elastic terminal 231 Large diameter part 232 Small diameter part D Longitudinal direction S1 accommodation part

Claims (5)

A housing portion for housing a cylindrical battery having a convex positive electrode terminal and a negative electrode terminal,
A negative electrode side terminal that is arranged at one bottom of the accommodating portion and is in contact with the negative electrode terminal;
A positive electrode side elastic terminal of an elastic body, which is arranged on the other bottom portion of the accommodation portion and is in contact with the positive electrode terminal,
A positive difference side elastic terminal, and a reverse difference prevention component that is arranged between the battery housed in the housing and slidable in the longitudinal direction of the housing,
The reverse difference prevention component includes an abutting surface capable of abutting the negative electrode terminal, and an opening into which the positive electrode terminal can be inserted in the vicinity of the abutting surface,
When the negative electrode terminal is brought into contact with the contact surface and is accommodated in the accommodation portion, the positive electrode side elastic terminal is pushed by the back surface of the reverse difference prevention component and does not protrude from the contact surface. A battery case that is elastically deformable. The negative electrode side terminal is attached to a lid member that covers the opening of the accommodation portion,
The battery case according to claim 1, wherein the length of the negative electrode side terminal in the longitudinal direction of the housing portion is shorter than that of the positive electrode side elastic terminal. The battery case according to claim 1 or 2, wherein the positive electrode side elastic terminal is a leaf spring having an inclined portion that can come into contact with the back surface of the reverse difference prevention component. The battery according to claim 1 or 2, wherein the positive electrode side elastic terminal is a compression spring including a large diameter portion having a diameter larger than the opening portion and a small diameter portion having a diameter smaller than the opening portion. Case. The reverse difference prevention component,
A lower sliding portion slidable on the lower surface of the housing portion,
An upper sliding portion that is slidable on the upper surface of the housing portion,
The battery case according to any one of claims 1 to 4, further comprising: a lateral sliding portion that is slidable on a vertical wall lateral to the reverse difference prevention component of the housing portion.