JP2017123266A - Battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack capable of suppressing increase in operation load even when dust enters, and performing size reduction.SOLUTION: An engaging member 12 includes a stopper portion 12a projecting so as to be engageable with an electric power tool 40, a first fulcrum 12e for swing the stopper portion 12a in an evacuation direction when a battery pack 10 is slid in a fitting direction with respect to the electric power tool 40, and a second fulcrum 12d for swinging the stopper portion 12a in the evacuation direction when the battery pack 10 is slid in the removal direction with respect to the electric power tool 40. A restricting member 13 restricts the engaging member 12 from swinging by using the second fulcrum 12d, and releases the restriction when a predetermined operation is performed.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a battery pack that can be attached to and detached from an electric power tool, and more particularly, to a battery pack characterized by an attaching / detaching method.

  As a conventional battery pack mounting structure, as shown in, for example, Patent Document 1, a case containing a battery is provided with a locking hook and a locking release button interlocked with the locking hook. There has been known an interlocking mechanism in which a locking hook moves in a locking release direction when an operation is pushed into the case. According to such a method, the battery pack can be reliably attached to and detached from the target device with a simple operation.

JP 2008-103144 A

  By the way, since the electric tool is used at a work site where dust or the like is generated, it is inevitable that the dust or the like enters the battery pack. In the structure described in Patent Document 1, when dust enters the battery pack, the dust enters the sliding surface of the locking hook, which may roughen the sliding surface and increase the frictional resistance. When the frictional resistance is increased, the operation load is increased and the operability is deteriorated. In the worst case, there is a possibility that the operation cannot be performed.

Further, in the structure described in Patent Document 1, a space for moving the locking hook in the vertical direction and a large space for arranging a spring for biasing the locking hook in the protruding direction in front of the battery cell. Therefore, there is a problem that the size of the battery pack becomes large.
Then, this invention makes it a subject to provide the battery pack which can suppress the increase in operation load even when dust enters, and can implement | achieve size reduction.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

  The invention according to claim 1 is a battery pack that is attachable to and detachable from the electric tool, and includes a case that houses a battery cell, an engagement member that is swingably supported by the case, and the engagement member. A restricting member that restricts swinging in a predetermined direction, and the engaging member slides in a mounting direction with respect to the electric power tool and a stopper portion that protrudes to be engageable with the electric power tool. A first fulcrum for swinging the stopper portion in the retracting direction when the battery pack is moved, and for swinging the stopper portion in the retracting direction when the battery pack is slid in the removal direction with respect to the electric tool. And the restriction member restricts the engagement member from swinging using the second fulcrum and releases the restriction when a predetermined operation is performed. It is characterized by doing.

  The invention described in claim 2 is characterized in that, in addition to the feature of the invention described in claim 1, an operation portion for enabling the predetermined operation is provided on the surface of the battery pack. .

  According to a third aspect of the present invention, in addition to the feature of the second aspect of the present invention, the operation portion is provided on both sides along a sliding direction when the battery pack is attached to and detached from the electric tool. It is arranged on the surface and is provided so as to be able to be pushed into the battery pack.

  According to a fourth aspect of the present invention, in addition to the feature of the second aspect of the present invention, the operation portion is provided so as to be orthogonal to a sliding direction when the battery pack is attached to and detached from the electric tool. It is arranged on the front surface.

  The invention according to claim 1 is as described above, and the engaging member includes a stopper portion projecting so as to be engageable with the power tool, and the battery pack being slid in the mounting direction with respect to the power tool. A first fulcrum for swinging the stopper portion in the retracting direction; a second fulcrum for swinging the stopper portion in the retracting direction when the battery pack is slid in the removal direction with respect to the power tool; The restricting member restricts the engaging member from swinging using the second fulcrum and releases the restriction when a predetermined operation is performed. According to such a configuration, when the battery pack is attached, the engagement member swings about the first fulcrum by sliding the battery pack in the attachment direction, and the stopper portion moves in the retracting direction. When the battery pack is slid to the attachment position, the stopper portion engages with the attachment surface of the electric tool, and the attachment of the battery pack is completed. Even if an unintentional force in the removal direction is applied to the battery pack in this state, since the swinging of the engaging member using the second fulcrum is regulated by the regulating member, the stopper portion does not come off, and the battery The pack will not fall out of the power tool. When removing the battery pack, the restriction of the restriction member is released by a predetermined operation, and if the battery pack is slid in the removal direction, the engaging member swings about the second fulcrum and the stopper portion moves in the retracting direction. Since it moves, the battery pack can be removed.

  In the present invention, the operation when removing the battery pack is an indirect operation of releasing the restriction of the restriction member, and is not an action of directly moving the engagement member. Therefore, the operation load can be set small compared with the conventional structure in which the engaging member is directly moved. Moreover, even when dust enters, an increase in the operation load can be suppressed.

  Furthermore, since the space for moving the locking member in the vertical direction and the space for arranging the spring for biasing the locking member in the protruding direction can be reduced, the size of the battery pack can be reduced. be able to.

  The invention according to claim 2 is as described above, and an operation portion for enabling the predetermined operation is provided on a surface of the battery pack. According to such a configuration, the operation unit can be operated with an operation such that the operation unit is grasped with one hand.

  The invention according to claim 3 is as described above, and the operation unit is disposed on both side surfaces provided along a sliding direction when the battery pack is attached to and detached from the electric tool, It is provided so that it can be pushed into the battery pack. According to such a configuration, since the operation unit can be operated by sandwiching the operation unit from both sides, it is easy to apply force when removing the battery pack, and operability is good.

  The invention according to claim 4 is as described above, and the operation portion is disposed on a front surface provided to be orthogonal to a sliding direction when the battery pack is attached to and detached from the electric tool. . According to such a configuration, since the operation unit can be operated with the thumb or the like, it is easy to apply force when removing the battery pack, and operability is good.

It is an external appearance perspective view of an electric tool and a battery pack. It is an external appearance perspective view of a battery pack. It is (a) top view and (b) side view of a battery pack. It is a disassembled perspective view of a battery pack. It is (a) top view, (b) side view, (c) bottom view of the engaging member. It is the (a) top view, (b) side view, (c) bottom view of a control member (left). It is an AA line sectional view when a battery pack is attached to an electric tool. It is a figure which shows the state of an engaging member when a battery pack is attached to an electric tool, and the state of a control member, Comprising: (a) The bottom view seen from the back side of the upper case, (b) The perspective view seen from the back side of the upper case It is. It is an AA line sectional view when it is going to attach a battery pack to an electric tool. It is a figure which shows the state of an engaging member and a control member when it is going to attach a battery pack to an electric tool, Comprising: (a) The bottom view seen from the back side of the upper case, (b) Seen from the back side of the upper case It is a perspective view. It is an AA line sectional view when it is going to remove a battery pack from an electric tool. It is a figure which shows the state of an engaging member when a battery pack is going to be removed from an electric tool, Comprising: (a) The bottom view seen from the back side of the upper case, (b) Seen from the back side of the upper case FIG. It is an external appearance perspective view of the battery pack which concerns on a modification. It is a disassembled perspective view of the battery pack which concerns on a modification. It is a figure which shows the state of an engaging member and a control member when it is going to attach the battery pack which concerns on a modification to an electric tool, Comprising: (a) The bottom view seen from the back side of the upper case, (b) It is the perspective view seen from the back side. It is a figure which shows the state of an engaging member and a control member when it is going to remove the battery pack which concerns on a modification from an electric tool, Comprising: (a) The bottom view seen from the back side of the upper case, (b) Upper case It is the perspective view seen from the back side.

  Embodiments of the present invention will be described with reference to the drawings.

  The battery pack 10 according to the present embodiment can be used as a power source of the electric tool 40, and is formed so as to be chargeable / dischargeable with a built-in secondary battery. As shown in FIG. 1, the battery pack 10 can be attached to and detached from the electric tool 40. When the battery pack 10 is used as a power source of the electric tool 40, the battery pack 10 is attached to the electric tool 40 and used. The battery pack 10 has an upper surface as a mounting surface to the electric tool 40. As shown in FIG. 2, a terminal portion 10 a is provided on the mounting surface of the battery pack 10. When the battery pack 10 is attached to the electric power tool 40, the terminal portion 10 a is electrically connected to the terminal of the electric power tool 40 and can be discharged to the electric power tool 40. The battery pack 10 can be charged by being attached to a charger. When the battery pack 10 is attached to the charger, the terminal portion 10a is electrically connected to the terminal of the charger and can be charged using the charger.

  As shown in FIG. 1, the electric tool 40 according to the present embodiment has a mounting portion 41 for attaching the battery pack 10 to the lower end portion of the grip. As shown in FIG. 1, the mounting portion 41 is provided with rail engaging portions 41c on both sides. The rail engaging portion 41c is provided so as to cover a guide rail portion 10b of the battery pack 10 to be described later, and a protrusion that engages with the guide rail portion 10b is formed inside.

  Further, a recess 41 a for locking the battery pack 10 is provided on the lower surface of the mounting portion 41. As shown in FIG. 7 and the like, the recess 41a is a recess having a substantially inverted V-shaped cross section, and the surface of the mounting portion 41 on the front end 41b side is substantially perpendicular to the mounting direction (sliding direction) of the battery pack 10. It has become. Further, the surface of the recess 41a on the side opposite to the front end 41b is inclined with respect to the mounting direction (sliding direction) of the battery pack 10.

  On the other hand, as shown in FIGS. 2 to 4, the battery pack 10 according to this embodiment includes a case 11, a plurality of battery cells 18 accommodated in the case 11, and a control for controlling charging / discharging of the battery cells 18. A substrate 17, an engagement member 12 supported by the case 11 so as to be swingable, and a regulation member 13 for regulating swinging of the engagement member 12 in a predetermined direction are provided.

  The case 11 is a box as shown in FIG. 2 and the like, and is formed by vertically joining an upper case 11a and a lower case 11b. A pair of guide rail portions 10b is provided on the side portion of the upper case 11a. The guide rail portion 10 b serves as a guide when the battery pack 10 is slid with respect to the mounting portion 41 of the electric tool 40. That is, the guide rail portion 10b is configured to guide the battery pack 10 to be slidable with respect to the mounting portion 41 by engaging with a protrusion formed on the back side of the rail engaging portion 41c of the mounting portion 41. ing.

  In addition, a stopper opening 10c is formed on the upper surface of the case 11 so that a stopper portion 12a, which will be described later, protrudes in a retractable manner. Further, on both side surfaces of the case 11 (both side surfaces provided along the sliding direction when the battery pack 10 is attached to and detached from the electric tool 40), the operation unit 13a to be described later is operably exposed. An opening 10d is formed.

  The battery cell 18 is a secondary battery constituting the battery pack 10, and in the present embodiment, as shown in FIG. 4, a plurality of battery cells 18 arranged side by side are connected and used. The electrodes of adjacent battery cells 18 are electrically connected by a lead plate 19.

  The control board 17 is a board on which a circuit for controlling charging / discharging of the battery pack 10 is mounted, and is arranged above the battery cell 18 as shown in FIG. The control board 17 is arranged such that the upper surface faces the top surface of the upper case 11a. Charge / discharge terminals 16 are provided on the upper surface of the control board 17. The charge / discharge terminal 16 is a terminal for electrically connecting the battery cell 18 to an external device (the electric tool 40 or a charger) to enable charging / discharging. The charge / discharge terminal 16 is arranged on the back side of the terminal portion 10 a of the battery pack 10.

  As shown in FIG. 5, the engaging member 12 includes a stopper portion 12a protruding upward, a front shaft portion 12d provided in front of the stopper portion 12a, and a rear shaft provided in the rear of the stopper portion 12a. Part 12e.

  The stopper portion 12 a is a portion that engages with the recess 41 a of the electric tool 40. As shown in FIG. 2, the stopper portion 12a protrudes from the stopper opening 10c so as to be engageable with the recess 41a when the engaging member 12 is attached to the case 11. As shown in FIG. 5B, the stopper portion 12a is formed in a substantially inverted V-shaped cross section by a vertical surface 12b formed substantially vertically and an inclined surface 12c formed inclined. The vertical surface 12b is disposed on the front side in the traveling direction when the battery pack 10 is removed from the mounting portion 41, and is formed to face the vertical surface of the concave portion 41a when the stopper portion 12a is engaged with the concave portion 41a. Yes. The inclined surface 12c is disposed on the front side in the traveling direction when the battery pack 10 is attached to the mounting portion 41, and is formed to face the inclined surface of the recess 41a when the stopper portion 12a is engaged with the recess 41a. Has been.

  The front shaft portion 12 d is supported inside the case 11 so as to be a swing shaft. The front shaft portion 12d functions as a second fulcrum for swinging the stopper portion 12a in the retracting direction when the battery pack 10 is slid in the removal direction with respect to the electric tool 40.

  The rear shaft portion 12e is also supported inside the case 11 so as to be a swing shaft. The rear shaft portion 12e functions as a first fulcrum for swinging the stopper portion 12a in the retracting direction when the battery pack 10 is slid in the mounting direction with respect to the electric tool 40.

  As shown in FIG. 7 and the like, the engaging member 12 is always urged upward by a stopper spring 14. Due to the urging force of the stopper spring 14, the stopper portion 12 a protrudes from the stopper opening 10 c when no external force is applied. On the other hand, when the battery pack 10 is slid in the removal direction with respect to the electric tool 40, the vertical surface 12b of the stopper portion 12a is pushed by the vertical surface of the concave portion 41a, and the engaging member 12 biases the spring 14 for stopper. Against this, it can be swung with the front shaft portion 12d as a fulcrum. Further, when the battery pack 10 is slid in the mounting direction with respect to the electric tool 40, the inclined surface 12 c of the stopper portion 12 a is pushed by the front end portion 41 b of the mounting portion 41, and the engaging member 12 is attached to the stopper spring 14. It can be swung with the rear shaft 12e as a fulcrum against the force.

  As shown in FIG. 6, the regulating member 13 includes an operation portion 13 a formed with a finger pad, a contact portion 13 b protruding inward from the operation portion 13 a, and a relief portion 13 c formed by cutting out the contact portion 13 b. . The restriction member 13 shown in FIG. 6 is a restriction member 13 attached to the left side of the case 11. On the right side of the case 11, a regulating member 13 having a shape obtained by inverting the regulating member 13 shown in FIG. In this manner, the operation members 13 a are provided on both sides of the side surface of the battery pack 10 by attaching the regulating members 13 to both sides of the side surface of the case 11.

  The operation part 13a is a part that is operably exposed from the operation part opening 10d when the regulating member 13 is attached to the case 11. The operation portion 13 a is provided so as to be substantially flush with the side surface of the case 11.

The contact portion 13b is provided so as to protrude from the back side of the operation portion 13a. The contact portion 13 b is disposed inside the case 11 and below the rear shaft portion 12 e of the engagement member 12. Thereby, the movement of the rear-shaft part 12e can be controlled.
The escape portion 13c is provided adjacent to the contact portion 13b. The escape portion 13c is provided to release the restriction by the contact portion 13b.

  As shown in FIG. 8 and the like, the engaging member 12 is always urged sideways (outside) by the operating portion spring 15. When the external force is not applied by the urging force of the operating portion spring 15, the pair of operating portions 13 a are pushed out in directions away from each other. At this time, the upper surface of the contact portion 13b faces the lower surface of the rear shaft portion 12e of the engaging member 12, and restricts the rear shaft portion 12e from moving downward. In this state, since the rear shaft portion 12e cannot move downward, the engagement member 12 cannot swing about the front shaft portion 12d (second fulcrum).

  Here, the operation portion 13a can be pushed inward against the biasing force of the operation portion spring 15. When the operating portion 13a is pushed in to the back, the restricting member 13 moves, so that the escape portion 13c faces the lower surface of the rear shaft portion 12e of the engaging member 12. In other words, the restriction is released by the movement of the contact part 13b that has been restricted so that the rear shaft part 12e cannot move downward. In this state, since the rear shaft portion 12e can move downward, the engaging member 12 can swing about the front shaft portion 12d (second fulcrum).

  Next, a method for attaching the battery pack 10 will be described. When the battery pack 10 is attached to the electric tool 40, the battery pack 10 is slid from the front of the mounting portion 41 along the guide rail portion 10b. Then, as shown in FIG. 9, the inclined surface 12 c of the stopper portion 12 a is pushed by the front end portion 41 b of the mounting portion 41. As a result, as shown in FIGS. 9 and 10, the engaging member 12 swings around the rear shaft portion 12e as a fulcrum against the urging force of the stopper spring 14, and the stopper portion 12a moves in the retracting direction. . When the battery pack 10 is further slid and attached to the back of the mounting portion 41, the stopper portion 12a engages with the concave portion 41a of the mounting portion 41 as shown in FIG. At this time, the stopper portion 12a is biased upward by the stopper spring 14, and the stopper portion 12a and the concave portion 41a are reliably engaged.

  Further, when removing the battery pack 10 from the electric tool 40, first, the operation portion 13a is pushed in from both sides to release the restriction by the restriction member 13. That is, by pushing the operating portion 13a all the way down, the lower surface of the rear shaft portion 12e of the engagement member 12 faces the escape portion 13c so that the rear shaft portion 12e can move downward. Then, the battery pack 10 is slid in the direction opposite to that when the operation unit 13a is operated. Then, as shown in FIG. 11, the vertical surface 12b of the stopper portion 12a is pushed by the vertical surface of the recess 41a. As a result, as shown in FIG. 11, the engaging member 12 swings around the front shaft portion 12d as a fulcrum against the urging force of the stopper spring 14, and the stopper portion 12a moves in the retracting direction. At this time, as shown in FIG. 12, the rear shaft portion 12e moves downward using the escape portion 13c. Thereby, the engagement between the stopper portion 12a and the concave portion 41a of the mounting portion 41 is released, and the battery pack 10 can be detached from the electric tool 40.

  In addition, even if it is going to remove the battery pack 10 from the electric tool 40 without operating the operation part 13a, the battery pack 10 cannot be removed. 7 and 8, when the operating portion 13a is not operated, the contact portion 13b of the restricting member 13 restricts the downward movement of the rear shaft portion 12e of the engaging member 12. For this reason, it is impossible to move the rear portion of the engaging member 12 so that the rear portion of the engaging member 12 is tilted with the front shaft portion 12d as a fulcrum.

  On the other hand, it is possible to attach the battery pack 10 to the electric tool 40 in a state where the operation unit 13a is operated. When such an operation is performed, the engaging member does not swing around the rear shaft portion 12e as a fulcrum, but swings around the front shaft portion 12d, or the rear shaft portion 12e and the front shaft portion 12d move downward. Or move to

  As described above, according to the present embodiment, the engaging member 12 slides in the mounting direction with respect to the electric tool 40 and the stopper portion 12a protruding so as to be engageable with the electric tool 40. A rear shaft portion 12e (first fulcrum) for swinging the stopper portion 12a in the retracting direction when the stopper portion 12a is moved, and the stopper portion 12a when the battery pack 10 is slid in the removing direction with respect to the electric tool 40. A front shaft portion 12d (second fulcrum) for swinging in the retracting direction, and the restricting member 13 restricts the engaging member 12 from swinging using the second fulcrum. The restriction is released when a predetermined operation is performed. According to such a configuration, when the battery pack 10 is attached, the engagement member 12 swings around the first fulcrum by sliding the battery pack 10 in the attaching direction, and the stopper portion 12a moves in the retracting direction. To do. When the battery pack 10 is slid to the attachment position, the stopper portion 12a engages with the attachment surface of the electric tool 40, and the attachment of the battery pack 10 is completed. Even if an unintentional force in the removing direction is applied to the battery pack 10 in this state, the swinging of the engaging member 12 using the second fulcrum is restricted by the restricting member 13, so that the stopper portion 12 a is released. The battery pack 10 does not fall off from the electric tool 40. When removing the battery pack 10, the restriction of the restriction member 13 is released by a predetermined operation, and if the battery pack 10 is slid in the removal direction, the engaging member 12 swings around the second fulcrum, and the stopper portion Since 12a moves in the retracting direction, the battery pack 10 can be removed.

  The operation when removing the battery pack 10 is an indirect operation of releasing the restriction of the restriction member 13, and is not an operation of moving the engagement member 12 directly. Therefore, compared with the conventional structure which moves the engaging member 12 directly, an operation load can be set small. Moreover, even when dust enters, an increase in the operation load can be suppressed.

  Furthermore, since the space for moving the locking member in the vertical direction and the space for arranging the spring for biasing the locking member in the protruding direction can be reduced, the size of the battery pack 10 can be reduced. can do.

  In addition, the operation unit 13 a is provided on both sides of the side surface of the battery pack 10. According to such a configuration, since the operation unit 13a can be operated with one hand from both sides of the side surface, it is easy to apply force when removing the battery pack 10, and operability is good.

  In the above-described embodiment, the downward movement of the rear shaft portion 12e is restricted by the restricting member 13, but the embodiment of the present invention is not limited to this. The restricting member 13 only needs to restrict at least the engagement member 12 from swinging using the second fulcrum. For example, the regulating member 13 may be formed so as to engage with a portion other than the rear shaft portion 12e, and the swing of the engaging member 12 may be regulated by such engagement.

(Modification)
13-16 is a figure which concerns on the modification of this invention. The basic aspect of this modification is the same as that of the above-described embodiment, but the operation unit is provided on the front surface of the case 11 (the front surface provided to be orthogonal to the sliding direction when the battery pack 10 is attached to and detached from the electric tool 40). This embodiment is different from the above-described embodiment in that the opening 10d for operation is formed and the operation portion 13a is exposed on the front surface so as to be operable.

  As shown in FIGS. 13 and 14, the restricting member 13 according to the modified example has an operation portion 13 a formed with a finger pad, a contact portion 13 b protruding inward from the operation portion 13 a, and a contact portion 13 b. And an escape portion 13c formed. The restricting member 13 is attached to the front surface of the case 11.

  The operation part 13a is a part that is operably exposed from the operation part opening 10d when the regulating member 13 is attached to the case 11. The operation unit 13 a is provided so as to be substantially flush with the front surface of the case 11.

The contact portion 13b is provided so as to protrude from the back side of the operation portion 13a. The contact portion 13 b is disposed inside the case 11 and below the rear shaft portion 12 e of the engagement member 12. Thereby, the movement of the rear-shaft part 12e can be controlled.
The escape portion 13c is provided adjacent to the contact portion 13b. The escape portion 13c is provided to release the restriction by the contact portion 13b.

  As shown in FIG. 15 and the like, the engaging member 12 is always urged forward (outside) by the operating portion spring 15. When the external force is not applied by the biasing force of the operating portion spring 15, the operating portion 13a is pushed forward. At this time, the upper surface of the contact portion 13b faces the lower surface of the rear shaft portion 12e of the engaging member 12, and restricts the rear shaft portion 12e from moving downward. In this state, since the rear shaft portion 12e cannot move downward, the engagement member 12 cannot swing about the front shaft portion 12d (second fulcrum).

  Here, the operation portion 13a can be pushed inward against the biasing force of the operation portion spring 15. When the operating portion 13a is pushed in to the back, the restricting member 13 moves, so that the escape portion 13c faces the lower surface of the rear shaft portion 12e of the engaging member 12. In other words, the restriction is released by the movement of the contact part 13b that has been restricted so that the rear shaft part 12e cannot move downward. In this state, since the rear shaft portion 12e can move downward, the engaging member 12 can swing about the front shaft portion 12d (second fulcrum).

  Next, a method for attaching the battery pack 10 will be described. When the battery pack 10 is attached to the electric tool 40, the battery pack 10 is slid from the front of the mounting portion 41 along the guide rail portion 10b. Then, the inclined surface 12c of the stopper portion 12a is pushed by the front end portion 41b of the mounting portion 41 as in the embodiment described above. As a result, as shown in FIG. 15, the engaging member 12 swings around the rear shaft portion 12e against the biasing force of the stopper spring 14, and the stopper portion 12a moves in the retracting direction. When the battery pack 10 is further slid and attached to the back of the mounting portion 41, the stopper portion 12a engages with the concave portion 41a of the mounting portion 41, and the mounting is completed. At this time, the stopper portion 12a is biased upward by the stopper spring 14, and the stopper portion 12a and the concave portion 41a are reliably engaged.

  When removing the battery pack 10 from the electric tool 40, first, the operation portion 13a is pushed in to release the restriction by the restriction member 13. That is, by pushing the operating portion 13a all the way down, the lower surface of the rear shaft portion 12e of the engagement member 12 faces the escape portion 13c so that the rear shaft portion 12e can move downward. Then, the battery pack 10 is slid in the direction opposite to that when the operation unit 13a is operated. Then, the vertical surface 12b of the stopper part 12a is pushed by the vertical surface of the recessed part 41a similarly to embodiment already demonstrated. As a result, as shown in FIG. 16, the engaging member 12 swings around the front shaft portion 12d against the urging force of the stopper spring 14, and the stopper portion 12a moves in the retracting direction. At this time, the rear shaft portion 12e moves downward using the escape portion 13c. Thereby, the engagement between the stopper portion 12a and the concave portion 41a of the mounting portion 41 is released, and the battery pack 10 can be detached from the electric tool 40.

In addition, even if it is going to remove the battery pack 10 from the electric tool 40 without operating the operation part 13a, the battery pack 10 cannot be removed. In a state where the operation portion 13a is not operated, the contact portion 13b of the restriction member 13 restricts the downward movement of the rear shaft portion 12e of the engagement member 12, and therefore the front shaft portion 12d is used as a fulcrum. The movement which makes the rear part of the joint member 12 fall down cannot be performed.
Also by such an aspect, the same effect as the above-described embodiment can be obtained.

  In this modification, the operation unit 13a is directly slid inward. However, the present invention is not limited to this. For example, when the operation portion 13a is slid up and down, the contact portion 13b may move inward via an intermediate member or the like.

DESCRIPTION OF SYMBOLS 10 Battery pack 10a Terminal part 10b Guide rail part 10c Stopper opening 10d Operation part opening 11 Case 11a Upper case 11b Lower case 12 Engagement member 12a Stopper part 12b Vertical surface 12c Inclined surface 12d Front shaft part (2nd fulcrum)
12e Rear shaft (first fulcrum)
DESCRIPTION OF SYMBOLS 13 Restriction member 13a Operation part 13b Contact part 13c Escape part 14 Stopper spring 15 Operation part spring 16 Charge / discharge terminal 17 Control board 18 Battery cell 19 Lead plate 40 Electric tool 41 Mounting part 41a Recess 41b Front end 41c Rail engagement Part

Claims (4)

A battery pack that can be attached to and detached from the power tool,
A case for housing a battery cell;
An engaging member that is swingably supported by the case;
A regulating member that regulates swinging of the engaging member in a predetermined direction;
With
The engaging member includes a stopper portion that protrudes so as to be engageable with the electric tool, and for swinging the stopper portion in the retracting direction when the battery pack is slid in the attaching direction with respect to the electric tool. A first fulcrum and a second fulcrum for swinging the stopper portion in the retracting direction when the battery pack is slid in the removal direction with respect to the electric tool,
The battery pack is characterized in that the restriction member restricts the engagement member from swinging using the second fulcrum, and releases the restriction when a predetermined operation is performed.   The battery pack according to claim 1, wherein an operation unit for enabling the predetermined operation is provided on a surface of the battery pack.   The operation portion is provided on both side surfaces provided along a sliding direction when the battery pack is attached to and detached from the electric tool, and is provided so as to be able to be pushed into the battery pack. The battery pack according to claim 2.   The battery pack according to claim 2, wherein the operation unit is disposed on a front surface provided to be orthogonal to a sliding direction when the battery pack is attached to and detached from the electric tool.

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