Accommodating box

Abstract

To provide a technology which enables easy removal of a battery pack from a battery attachment unit.SOLUTION: An accommodating box includes: a case; and a plurality of battery attaching units supported by the case. The battery packs are detachably attached to the respective battery attaching units. Each of the battery packs includes an engagement member which serves as an engagement part configured to engage with an electrical device when the battery pack is attached to the electrical device and whose engagement with the electrical device is released by a user's operation on the engagement member. Each of the battery attaching units includes: a terminal member unit configured to be electrically connected to one of the battery packs when the battery pack is attached to the battery attaching unit; and a holding member that holds the terminal member unit. The holding member does not engage with the engagement part of the battery pack when the battery pack is attached to the battery attaching unit.SELECTED DRAWING: Figure 18

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a storage box capable of charging a battery pack while storing the battery pack in the storage box. [Background technology]

[0002] Patent Document 1 discloses a storage box. The storage box can charge a battery pack that is attached to an electrical device and used while being stored therein. The storage box includes a case and a plurality of battery mounting units supported by the case. The battery pack is detachably attached to each of the plurality of battery mounting units. The battery pack includes a locking claw and an unlocking button that moves the locking claw. The battery mounting unit is provided with an engagement recess into which the locking claw fits. When the unlocking button is pressed down while the battery pack is attached to the battery mounting unit, the locking claw is released from the engagement recess. This allows the battery pack to be removed from the battery mounting unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-62808 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned storage box, in order to remove the battery pack from the battery mounting unit, it is necessary to press down the unlock button to disengage the lock claw from the engagement recess. Therefore, the battery pack cannot be easily removed from the battery mounting unit. This specification provides a technology that allows the battery pack to be easily removed from the battery mounting unit. [Means for solving the problem]

[0005] This specification discloses a storage box. The storage box is capable of charging a battery pack that is attached to an electrical device and used while being stored therein. The storage box includes a case and a plurality of battery mounting units supported by the case. The battery pack is detachably attached to each of the plurality of battery mounting units. The battery pack includes an engagement member that engages with the electrical device when the battery pack is attached to the electrical device and that is disengaged from the electrical device by a user's operation on the engagement member. The battery mounting unit includes a terminal member unit that is electrically connected to the battery pack when the battery pack is attached to the battery mounting unit, and a holding member that holds the terminal member unit. The holding member does not engage with the engagement member of the battery pack when the battery pack is attached to the battery mounting unit.

[0006] According to the above configuration, when the battery pack is attached to the battery mounting unit, the engaging member of the battery pack does not engage with the holding member of the battery mounting unit. Therefore, when removing the battery pack from the battery mounting unit, it is not necessary to disengage the engaging member from the holding member. This makes it possible to easily remove the battery pack from the battery mounting unit. [Brief description of the drawings]

[0007] [Figure 1] 2 is a perspective view of the storage box 2 of the embodiment when the case cover 8 is in a closed position. [Diagram 2] 2 is a perspective view of the storage box 2 of the embodiment when the case cover 8 is in the open position. [Diagram 3] FIG. 2 is a perspective view of two storage boxes 2 of the embodiment stacked vertically. [Figure 4] 2 is a cross-sectional view of the vicinity of a lower finger groove 28 of the storage box 2 of the embodiment. [Diagram 5]1 is a perspective view of three storage boxes 2 according to an embodiment, in which the central storage box 2 is being pulled out from the storage boxes 2 on both ends. [Figure 6] 2 is a cross-sectional view of the vicinity of a belt attachment hole 30 of the storage box 2 of the embodiment. [Figure 7] 2 is a cross-sectional view of the storage box 2 of the embodiment when the case cover 8 is in a closed position. [Figure 8] FIG. 2 is a perspective view of a battery mounting unit 36 ​​according to the embodiment. [Figure 9] FIG. 2 is a side view of the storage box 2 of the embodiment when the case cover 8 is removed. [Figure 10] 3 is a cross-sectional view of the battery mounting unit 36 ​​of the embodiment. FIG. [Figure 11] 2 is a cross-sectional view of the vicinity of a battery mounting unit 36 ​​when a case cover 8 is in an open position in the storage box 2 of the embodiment. [Figure 12] 2 is a perspective view of the rear battery mounting unit 48 and its vicinity in the battery mounting unit 36 ​​of the embodiment. FIG. [Figure 13] 13 is a rear view of the vicinity of terminal member units 64, 82, and 100 of the battery mounting unit 36 ​​of the embodiment. FIG. [Figure 14] FIG. 2 is a side view of the battery pack BP according to the embodiment. [Figure 15] FIG. 2 is a perspective view of a battery pack BP according to the embodiment. [Figure 16] 1 is a perspective view of the vicinity of a battery terminal member unit 146 of the battery pack BP of the embodiment. FIG. [Figure 17] 1 is a cross-sectional view showing the positional relationship between a charging terminal member 120 of a battery mounting unit 36 ​​and a battery charging terminal member 160 of a battery pack BP in the embodiment. [Figure 18] 10 is a vertical cross-sectional view of the vicinity of the escape grooves 70, 86, and 104 of the battery mounting unit 36 ​​of the embodiment. FIG. [Figure 19] 13 is a horizontal cross-sectional view of the vicinity of the escape grooves 70, 86, and 104 of the battery mounting unit 36 ​​of the embodiment. FIG. [Figure 20]2 is a cross-sectional view of the vicinity of the battery mounting unit 36 ​​when the case cover 8 is in the closed position in the storage box 2 of the embodiment. [Figure 21] 1 is a cross-sectional view of a cushioning material 180 and a battery pack BP according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Representative and non-limiting embodiments of the present invention are described in detail below with reference to the drawings. This detailed description is intended simply to provide those skilled in the art with details for implementing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Additionally, the additional features and inventions disclosed can be used separately or together with other features and inventions to provide further improved storage boxes.

[0009] In addition, the combinations of features and steps disclosed in the following detailed description are not essential for implementing the present invention in the broadest sense, but are specifically described only to illustrate representative embodiments of the present invention. Furthermore, the various features of the following representative embodiments and the various features described in the claims do not have to be combined in the exact manner of the embodiments described herein or in the order listed in order to provide additional and useful embodiments of the present invention.

[0010] All features described in the specification and / or claims are intended to be disclosed individually and independently of one another as limitations to the specific features described in the original disclosure and claims, apart from the configuration of features described in the examples and / or claims. Furthermore, all numerical ranges and group or aggregate descriptions are intended to disclose intermediate configurations thereof as limitations to the specific features described in the original disclosure and claims.

[0011] In one or more embodiments, the retaining member may be spaced apart from the engaging member of the battery pack when the battery pack is attached to the battery mounting unit.

[0012] According to the above configuration, with a simple configuration, it is possible to prevent the engaging member of the battery pack from engaging with the holding member of the battery mounting unit.

[0013] In one or more embodiments, the battery pack may include a battery charging terminal member and a battery communication terminal member. The terminal member unit may include a charging terminal member electrically connected to the battery charging terminal member of the battery pack when the battery pack is attached to the battery mounting unit, and a communication terminal member electrically connected to the battery communication terminal member of the battery pack when the battery pack is attached to the battery mounting unit. The battery pack may be attached to the battery mounting unit by moving in a mounting direction relative to the battery mounting unit. The length of the charging terminal member of the terminal member unit in the mounting direction may be 150% or less of the length of the communication terminal member of the terminal member unit in the mounting direction.

[0014] If the length of the charging terminal member of the terminal member unit in the mounting direction is greater than 150% of the length of the communication terminal member of the terminal member unit in the mounting direction, the frictional force acting between the battery charging terminal member of the battery pack and the charging terminal member of the terminal member unit makes it difficult to mount the battery pack to the battery mounting unit. With the above configuration, it is possible to make it easier to mount the battery pack to the battery mounting unit.

[0015] In one or more embodiments, the charging terminal member of the terminal member unit may include a straight portion extending along the mounting direction and an insert portion connected to an end of the straight portion and tapering away from the straight portion. When the battery pack moves in the mounting direction relative to the battery mounting unit, the insert portion may be inserted into the battery charging terminal member of the battery pack before the straight portion. The length of the insert portion in the mounting direction may be 20% or more of the length of the charging terminal member in the mounting direction.

[0016] When the length of the plug-in portion in the mounting direction is less than 20% of the length of the charging terminal member in the mounting direction, the frictional force acting between the battery charging terminal member of the battery pack and the plug-in portion makes it difficult to mount the battery pack to the battery mounting unit. According to the above configuration, it is possible to make it easier to mount the battery pack to the battery mounting unit.

[0017] In one or more embodiments, a length of the charging terminal member of the terminal member unit in the mounting direction may be shorter than a length of the battery charging terminal member of the battery pack in the mounting direction. The battery charging terminal member of the battery pack may include a first clamp portion capable of clamping the charging terminal member, and a second clamp portion capable of clamping the charging terminal member and disposed on the mounting direction side of the first clamp portion. When the battery pack is mounted to the battery mounting unit, the charging terminal member of the terminal member unit may be clamped by the second clamp portion without passing through the first clamp portion.

[0018] In a typical battery pack, the battery charging terminal member is designed to be long so that the battery pack can be charged quickly. In a configuration in which the battery pack does not need to be charged quickly, the charging terminal member of the terminal member unit may be configured to contact only a portion of the battery charging terminal member. In a configuration in which the charging terminal member of the terminal member unit is clamped by the first clamp portion, when the battery pack is to be attached to the battery mounting unit, the charging terminal member is clamped by the second clamp portion, passes through the second clamp portion, and then is clamped by the first clamp portion. According to the above configuration, when the battery pack is attached to the battery mounting unit, the charging terminal member is clamped by the second clamp portion without passing through the first clamp portion. This makes it easier to attach the battery pack to the battery mounting unit compared to a configuration in which the charging terminal member of the terminal member unit is clamped by the first clamp portion.

[0019] In one or more embodiments, the battery pack may be located in the mounting position when attached to the battery mounting unit. When the battery pack is attached to the battery mounting unit, the battery pack may move to the mounting position due to the weight of the battery pack.

[0020] According to the above configuration, the battery pack can be easily attached to the battery mounting unit.

[0021] In one or more embodiments, the storage box may be mountable on a mounting surface. When the storage box is mounted on the mounting surface and the battery pack is attached to the battery mounting unit, the battery pack may be inclined with respect to an orthogonal plane perpendicular to the mounting surface.

[0022] According to the above configuration, the battery pack can be easily removed from the battery mounting unit.

[0023] In one or more embodiments, the storage box may be mountable on a mounting surface. The case may have a box shape with an upper opening that opens at the top, and may accommodate at least a portion of each of the plurality of battery mounting units. The plurality of battery mounting units may include a first battery mounting unit and a second battery mounting unit that is disposed apart from the first battery mounting unit in a first direction along the mounting surface. When the battery pack is attached to the first battery mounting unit, the battery pack may protrude from the inside of the case to the outside through the upper opening. When the battery pack is attached to the second battery mounting unit, the battery pack may protrude from the inside of the case to the outside through the upper opening. A protruding length of the battery pack attached to the first battery mounting unit protruding from the case may be longer than a protruding length of the battery pack attached to the second battery mounting unit protruding from the case.

[0024] When the battery pack protrudes from the case, the user can easily grasp the battery pack with his / her hand. According to the above configuration, when the battery pack is attached to each of the first battery mounting unit and the second battery mounting unit, the user can easily grasp the battery pack with his / her hand and remove the battery pack from the first battery mounting unit.

[0025] In one or more embodiments, each of the first battery mounting unit and the second battery mounting unit may protrude from the inside to the outside of the case through the upper opening. A protruding length of the first battery mounting unit protruding from the case may be longer than a protruding length of the second battery mounting unit protruding from the case.

[0026] According to the above configuration, when the battery pack is attached to each of the first battery mounting unit and the second battery mounting unit, a user can grasp the battery pack with his or her hands and more easily remove the battery pack from the first battery mounting unit.

[0027] In one or more embodiments, the storage box may further include a case cover capable of closing the upper opening of the case. The case cover is attached to the case so as to be movable relative to the case, and may move between a closed position that closes the upper opening of the case and an open position that opens the upper opening of the case. When in the open position, the case cover may be disposed in the first direction relative to the second battery mounting unit.

[0028] When the case cover is in the open position, a user stands on the opposite side of the second battery mounting unit from the case cover and attempts to remove the battery pack from the battery mounting unit. According to the above configuration, when the battery pack is attached to each of the first battery mounting unit and the second battery mounting unit, the battery pack can be more easily removed from the first battery mounting unit.

[0029] In one or more embodiments, the storage box may further include a case cover capable of closing the upper opening of the case, and a cushioning material made of an elastic material attached to the case cover. When the case cover closes the upper opening of the case, the cushioning material may be sandwiched between the battery pack attached to the first battery mounting unit and the case cover, and may also be sandwiched between the battery pack attached to the second battery mounting unit and the case cover. A pushing depth of the cushioning material into the battery pack attached to the first battery mounting unit may be substantially the same as a pushing depth of the cushioning material into the battery pack attached to the second battery mounting unit.

[0030] According to the above configuration, the force acting from the cushioning material on the battery pack attached to the first battery mounting unit is substantially the same as the force acting from the cushioning material on the battery pack attached to the second battery mounting unit. As a result, when the case cover closes the upper opening of the case, the force acting from the cushioning material on the multiple battery packs is substantially the same, and the multiple battery packs can be maintained in predetermined positions.

[0031] In one or more embodiments, the case may have a box shape with an upper opening that is open at the top. The storage box may further include a case cover that is capable of closing the upper opening of the case and that defines a storage space between the case and the case when the upper opening of the case is closed. The multiple battery mounting units may be disposed in the storage space. The battery pack may be located in a mounting position when attached to the battery mounting unit. The case cover may maintain the battery pack in the mounting position relative to the battery mounting unit when the upper opening of the case is closed.

[0032] According to the above configuration, when the case cover closes the upper opening of the case, it is possible to prevent the battery pack from coming off from the mounting position relative to the battery mounting unit.

[0033] In one or more embodiments, the storage box may further include a cushioning material attached to the case cover and sandwiched between the battery pack and the case cover when the case cover closes the upper opening of the case. The cushioning material may be made of an elastic material.

[0034] The sizes of the battery packs may differ between battery packs due to manufacturing tolerances. In a configuration in which the cushioning material does not elastically deform, when the case cover closes the upper opening of the case, an excessive force may act on a specific battery pack from the case cover. According to the above configuration, even if the sizes of the battery packs differ between the battery packs, the cushioning material elastically deforms, thereby making it possible to prevent the case cover from acting on a specific battery pack with an excessive force.

[0035] In one or more embodiments, the storage box may include a detection device that detects that the case cover is closing the upper opening of the case, and a control unit. The control unit may allow charging of the battery pack attached to the battery mounting unit when the detection device detects that the case cover is closing the upper opening of the case.

[0036] If the battery pack is not in the mounting position, the battery pack cannot be charged normally. According to the above configuration, the battery pack is charged while in the mounting position, so that the battery pack can be charged normally.

[0037] (Example) As shown in FIG. 1 and FIG. 2, the storage box 2 is a charger that can simultaneously charge a plurality of battery packs BP (12 in this embodiment) while storing them inside. As shown in FIG. 7, the storage box 2 is not electrically connected to the charging stand 4 by wiring or the like, and when the storage box 2 stores a battery pack BP and is placed on the charging stand 4, the battery pack BP is charged. The charging stand 4 operates with power supplied from an external power source (not shown) via a power cord (not shown). The storage box 2 is, for example, a non-contact charger of an electromagnetic induction type. In a modified example, the storage box 2 may be a non-contact charger of various types other than the electromagnetic induction type. In the following, the direction perpendicular to the placement surface P1 on which the storage box 2 is placed is referred to as the up-down direction, the longitudinal direction of the storage box 2 is referred to as the left-right direction, and the direction perpendicular to the up-down direction and the left-right direction is referred to as the front-rear direction.

[0038] As shown in FIG. 1 and FIG. 2, the storage box 2 includes a case 6 and a case cover 8. The case 6 has a substantially rectangular box shape. The case 6 has an upper opening 12 that is open at the top. The case 6 also includes cover attachment parts 14 that are disposed near the left rear end and near the right rear end. The case cover 8 is rotatably attached to the cover attachment parts 14 by an attachment member 16. The case cover 8 is movable between a closed position and an open position. As shown in FIG. 1, when the case cover 8 is in the closed position, the upper opening 12 (see FIG. 2) of the case 6 is closed. As a result, as shown in FIG. 7, a storage space 18 is defined between the case 6 and the case cover 8. The battery pack BP is disposed in the storage space 18. As shown in FIG. 2, when the case cover 8 is in the open position, the upper opening 12 of the case 6 is opened. As a result, a user can attach the battery pack BP to the storage box 2 from the front side of the case 6, and can also remove the battery pack BP from the storage box 2.

[0039] 1 and 2, four cover locking members 20 are movably attached near the upper end of the case 6. Two cover locking members 20 are attached near the left and right ends of the front surface 6a of the case 6, one cover locking member 20 is attached near the rear end of the left surface 6b of the case 6, and the remaining cover locking member 20 is attached near the rear end of the right surface 6c of the case 6.

[0040] Four cover engagement protrusions 22 are formed on the case cover 8. Two of the cover engagement protrusions 22 are disposed near the left and right ends of the front surface 8a of the case cover 8, and one cover engagement protrusion 22 is disposed near the rear end of the right surface 8c of the case cover 8. Although not shown, the remaining cover engagement protrusion 22 is disposed near the rear end of the left surface 8b of the case cover 8. When the case cover 8 is in the closed position, the user operates the cover lock member 20 to pull it upward, whereby the cover engagement protrusion 22 engages with the cover lock member 20. When the cover lock member 20 engages with the cover engagement protrusion 22, the user cannot move the case cover 8 from the open position toward the closed position.

[0041] Further, four case engagement protrusions 24 are formed near the bottom end of the case 6. Two of the case engagement protrusions 24 are located near the left and right ends of the front surface 6a of the case 6, one case engagement protrusion 24 is located near the rear end of the left surface 6b of the case 6, and the remaining case engagement protrusion 24 is located near the rear end of the right surface 6c of the case 6. When the case cover 8 is in the closed position, the case engagement protrusions 24 are aligned in a vertical line with the cover engagement protrusions 22.

[0042] In addition, four case lock members 26 are movably attached to the case cover 8. Two of the case lock members 26 are attached near the left end and near the right end of the front surface 8a of the case cover 8, one cover engagement protrusion 22 is attached near the rear end of the left surface 8b of the case cover 8, and the remaining cover engagement protrusion 22 is attached near the rear end of the right surface 8c of the case cover 8. When the case cover 8 is in the closed position, the case lock members 26 are arranged side by side with the cover lock members 20 in the vertical direction. A vertical groove 27 extending in the vertical direction is formed in the case 6 and the case cover 8, and the case lock members 26 and the cover lock members 20 are arranged in the vertical groove 27 together with the cover engagement protrusion 22. As shown in FIG. 3, when a plurality of storage boxes 2 (two in FIG. 3) are stacked vertically, the user operates the case lock member 26 to pull it up, whereby the case lock member 26 engages with the case engagement protrusion 24 (see FIG. 1). This makes it possible to prevent the plurality of storage boxes 2 stacked vertically from collapsing.

[0043] Furthermore, as shown in FIG. 1 and FIG. 2, two lower finger grooves 28 are formed near the lower end of the case 6. One of the lower finger grooves 28 is recessed from the left side 6b of the case 6, and the other lower finger groove 28 is recessed from the right side 6c of the case 6. As shown in FIG. 4, the lower finger groove 28 extends from the left side 6b (right side 6c) of the case 6 toward the inside of the case 6 along the left-right direction, and then bends and extends upward. For example, as shown in FIG. 5, when three storage boxes 2 are lined up in the front-rear direction, a user can easily pull out the central storage box 2 from the storage boxes 2 at both ends by inserting a finger into the lower finger groove 28 in the central storage box 2 arranged between the storage boxes 2 at both ends and then hooking the finger on the case 6, and then pulling the central storage box 2. In FIG. 5, the storage boxes 2 at both ends are illustrated by dashed lines.

[0044] Further, as shown in FIG. 1 and FIG. 2, two belt attachment holes 30 are formed in the case cover 8. One belt attachment hole 30 is recessed from the left surface 8b of the case cover 8, and the other belt attachment hole 30 is recessed from the right surface 8c of the case cover 8. As shown in FIG. 6, the belt attachment hole 30 extends from the left surface 8b (right surface 8c) of the case cover 8 toward the inside of the case cover 8 along the left-right direction, and then bends and extends upward to the upper surface 8d of the case cover 8. A shoulder belt 32 is inserted through the belt attachment hole 30. The shoulder belt 32 is attached to the case cover 8 by inserting one end of the shoulder belt 32 through one belt attachment hole 30 and inserting the other end of the shoulder belt 32 through the other belt attachment hole 30. The user can easily carry the storage box 2 by hanging the shoulder belt 32 on the shoulder. The user can also carry the storage box 2 by inserting his / her fingers into the two belt attachment holes 30 and hanging his / her fingers on the case cover 8. 1, a handle 34 is attached to the case cover 8, and the user can carry the storage box 2 by grasping the handle 34. Thus, the user can select a method of carrying the storage box 2 depending on the situation.

[0045] As shown in Fig. 7, the storage box 2 further includes a battery mounting unit 36, a control unit 38, a power receiving unit 40, and a detection device 41. The battery mounting unit 36 ​​is supported by the case 6. A battery pack BP is detachably attached to the battery mounting unit 36. As shown in Fig. 8, the battery mounting unit 36 ​​includes a base 42, a front battery mounting unit 44, a central battery mounting unit 46, and a rear battery mounting unit 48.

[0046] As shown in FIG. 7, the base 42 is disposed inside the case 6. As shown in FIG. 8, the base 42 includes a base body 50, a front mounting member 52, a central mounting member 54, and a rear mounting member 56. The base body 50 has a wide plate shape. As shown in FIG. 7, the base body 50 is fixed to the case 6 by a screw 57. The vertical position of the upper surface 58 of the base body 50 gradually increases toward the rear. The upper surface 58 includes a front upper surface 58a, a central upper surface 58b, and a rear upper surface 58c. When the storage box 2 is placed on the placement surface P1, the front upper surface 58a, the central upper surface 58b, and the rear upper surface 58c are approximately parallel to the placement surface P1. The distance from the placement surface P1 is shortest at the rear upper surface 58c and longest at the front upper surface 58a. A height H1 between the front upper surface 58a and the central upper surface 58b is substantially the same as a height H2 between the central upper surface 58b and the rear upper surface 58c. The heights H1 and H2 are, for example, 3 mm or more, 5 mm or more, 10 mm or more, or 20 mm or more.

[0047] The base body 50 divides the accommodation space 18 into a board accommodation space 18a and a battery accommodation space 18b. A control unit 38 and a power receiving unit 40 are arranged in the board accommodation space 18a. The control unit 38 is configured to control the generation of an induced magnetic flux between the power receiving unit 40 and a power transmitting unit (not shown) of the charging stand 4 when the accommodation box 2 is placed at a predetermined position on the charging stand 4. Since the configuration of non-contact charging using the electromagnetic induction method is well known, the description of the configuration of non-contact charging will be omitted below. When the induced magnetic flux is generated, a current flows through the power receiving unit 40. The control unit 38 supplies the current flowing through the power receiving unit 40 to the battery pack BP attached to the battery mounting unit 36. This charges the battery pack BP.

[0048] In the battery accommodating space 18b, the detection device 41, the front mounting member 52, the central mounting member 54, the rear mounting member 56, the front battery mounting unit 44, the central battery mounting unit 46, and the rear battery mounting unit 48 are arranged. As shown in FIG. 2, the detection device 41 is fixed in the case 6 near the upper opening 12 of the case 6. The detection device 41 can detect whether the case cover 8 is closing the upper opening 12 of the case 6, that is, whether the case cover 8 is in the closed position. The detection device 41 is, for example, a push-type switch. In this configuration, the detection device 41 detects that the case cover 8 is in the closed position by being pushed into the case cover 8 when the case cover 8 is in the closed position. In a modified example, the detection device 41 may be a device other than a push-type switch, for example, a light sensor capable of detecting whether light is blocked. As shown in FIG. 7, the detection device 41 transmits a signal to the control unit 38 while detecting that the case cover 8 is in the closed position. While the control unit 38 receives a signal from the detection device 41, it allows charging of the battery pack BP.

[0049] The front mounting member 52, the central mounting member 54, and the rear mounting member 56 are integrally formed with the base body 50. The front mounting member 52, the central mounting member 54, and the rear mounting member 56 are arranged side by side in the front-rear direction. The front mounting member 52 extends from the vicinity of the front end of the base body 50 in a direction (upward) away from the base body 50. The central mounting member 54 extends from the vicinity of the connection between the front upper surface 58a and the central upper surface 58b of the base body 50 in a direction (upward) away from the base body 50. The rear mounting member 56 extends from the vicinity of the connection between the central upper surface 58b and the rear upper surface 58c of the base body 50 in a direction (upward) away from the base body 50. When the storage box 2 is placed on the placement surface P1, the front mounting member 52, the central mounting member 54, and the rear mounting member 56 extend approximately perpendicular to the placement surface P1. As shown in FIG. 8, the front mounting member 52, the central mounting member 54 and the rear mounting member 56 each have a plate shape that is elongated in the left-right direction.

[0050] The front battery mounting unit 44 is fixed to the front mounting member 52 from the rear side. As shown in FIG. 9, the front battery mounting unit 44 is partially accommodated in the case 6. The front battery mounting unit 44 passes through the upper opening 12 of the case 6 and protrudes upward from the case 6. The protruding length La1 of the front battery mounting unit 44 from the upper opening 12 is, for example, 20 mm or more, 25 mm or more, or 30 mm or more. As shown in FIG. 8, the front battery mounting unit 44 includes a front holding member 60, a plurality of pairs (four pairs in this embodiment) of front rail units 62, a plurality (four in this embodiment) of front terminal member units 64, and a plurality (four in this embodiment) of front support members 66.

[0051] The front holding member 60, the pair of front rail units 62, one front terminal member unit 64, and one front support member 66 constitute a front battery mounting portion 68. That is, the front battery mounting unit 44 includes a plurality of (four in this embodiment) front battery mounting portions 68. The four front battery mounting portions 68 are arranged side by side in the left-right direction. A battery pack BP (see FIG. 2) is detachably attached to the front battery mounting portion 68. When each of the plurality of battery packs BP is attached to the front battery mounting portion 68, the plurality of battery packs BP are arranged side by side in the left-right direction. As shown in FIG. 9, when the battery pack BP is attached to the front battery mounting portion 68, the battery pack BP passes through the upper opening 12 of the case 6 and protrudes upward from the case 6. Therefore, the user can easily grasp the battery pack BP with his or her hand. The protruding length Lb1 of the battery pack BP from the upper opening 12 is, for example, 50 mm or more, 55 mm or more, or 60 mm or more.

[0052] As shown in FIG. 8, the front holding member 60 faces the battery pack BP when the battery pack BP is attached to the front battery attachment portion 68. As shown in FIG. 10, the rear surface 60a of the front holding member 60 is inclined with respect to an orthogonal plane P2 perpendicular to the front upper surface 58a of the base body 50, that is, inclined with respect to an orthogonal plane P2 perpendicular to the placement surface P1 (see FIG. 9). The inclination angle is, for example, 2 degrees or less, 3 degrees or less, 5 degrees or less, or 10 degrees or less. As a result, when the battery pack BP is attached to the front battery attachment portion 68, the battery pack BP is disposed with an inclination with respect to the orthogonal plane P2. The inclination of the battery pack BP with respect to the orthogonal plane P2 means that the longitudinal axis of the battery pack BP is inclined with respect to the orthogonal plane P2. The orthogonal plane P2 extends along the up-down direction and the left-right direction. The inclination angle of the battery pack BP is substantially the same as the inclination angle of the rear surface 60a of the front holding member 60. Moreover, the battery pack BP is attached to the front battery mounting portion 68 by sliding the battery pack BP along the rear surface 60a of the front holding member 60 in the mounting direction D1, and the battery pack BP is removed from the front battery mounting portion 68 by sliding the battery pack BP along the rear surface 60a of the front holding member 60 in a removal direction D2 opposite to the mounting direction D1. The mounting direction D1 and the removal direction D2 are inclined with respect to the up-down direction. The inclination angle is approximately the same as the inclination angle of the rear surface 60a of the front holding member 60.

[0053] As shown in FIG. 8, four pairs of front rail units 62 are arranged side by side in the left-right direction. The pair of front rail units 62 protrudes rearward from the front holding member 60. The pair of front rail units 62 extend in the up-down direction. The pair of front rail units 62 are arranged apart from each other in the left-right direction. The pair of front rail units 62 include a pair of front rail claws 72 that protrude toward each other. The pair of front rail claws 72 are arranged apart from the front holding member 60 so as to be approximately parallel to the rear surface 60a of the front holding member 60. The pair of front rail claws 72 extend approximately in the up-down direction. The pair of front rail claws 72 are engageable with the battery pack BP. When the battery pack BP is engaged with the pair of front rail claws 72, the battery pack BP can slide in the mounting direction D1 (see FIG. 10) and the removal direction D2 (see FIG. 10), but cannot slide in the left-right direction or the front-rear direction.

[0054] The front terminal member unit 64 is held by the front holding member 60 by penetrating the front holding member 60. The front terminal member unit 64 protrudes rearward from the front holding member 60. In the left-right direction, the front terminal member unit 64 is disposed between the pair of front rail units 62. The front terminal member unit 64 is electrically connected to the control unit 38 (see FIG. 7). A detailed configuration of the front terminal member unit 64 will be described later.

[0055] In the left-right direction, the front support member 66 is disposed between the pair of front rail units 62. The front support member 66 protrudes rearward from the front holding member 60 and protrudes upward from the upper surface 58 of the base body 50. When the battery pack BP is attached to the front battery attachment portion 68, the front support member 66 abuts against a pair of attachment rail units 142 (see FIG. 15) of the battery pack BP to support the battery pack BP.

[0056] A plurality of (four in this embodiment) front escape grooves 70 are formed in the front holding member 60. The four front escape grooves 70 are arranged side by side in the left-right direction. In the left-right direction, the front escape groove 70 is arranged between a pair of front rail units 62. The front escape groove 70 is arranged at the upper end of the rear surface 60a of the front holding member 60. The front escape groove 70 is recessed from the rear surface 60a toward the front side. The depth (width in the front-rear direction) of the front escape groove 70 becomes deeper toward the upper end of the front holding member 60. The upper end of the front escape groove 70 is open, i.e., not closed.

[0057] 10, a front support stand 74 is disposed behind the front support member 66. The front support stand 74 protrudes upward from the upper surface 58 of the base body 50. When the battery pack BP is attached to the front battery mounting portion 68, the front support stand 74 abuts against the lower end of the battery pack BP to support the battery pack BP from below.

[0058] The central battery mounting unit 46 is fixed to the central mounting member 54 from the rear side. The central battery mounting unit 46 is disposed rearward of the front battery mounting unit 44. As shown in FIG. 9, the central battery mounting unit 46 is partially accommodated in the case 6. The central battery mounting unit 46 passes through the upper opening 12 of the case 6 and protrudes upward from the case 6. A protruding length La2 by which the central battery mounting unit 46 protrudes from the case 6 is shorter than a protruding length La1 by which the front battery mounting unit 44 protrudes from the case 6. The protruding length La2 is, for example, 15 mm or more, 20 mm or more, or 25 mm or more. The protruding length La2 is shorter than the protruding length La1 by a height H1 (see FIG. 7). The difference between the protruding length La2 and the protruding length La1 is, for example, 3 mm, 5 mm, 10 mm, or 20 mm.

[0059] As shown in FIG. 8, the central battery mounting unit 46 has a similar configuration to the front battery mounting unit 44. The central battery mounting unit 46 includes a central holding member 78, a plurality of pairs (four pairs in this embodiment) of central rail units 80, a plurality of (four in this embodiment) of central terminal member units 82, and a plurality of (four in this embodiment) of central support members 84. The central holding member 78 has a similar configuration to the front holding member 60, the pair of central rail units 80 has a similar configuration to the pair of front rail units 62, the central terminal member unit 82 has a similar configuration to the front terminal member unit 64, and the central support member 84 has a similar configuration to the front support member 66. In addition, the central escape groove 86 formed in the central holding member 78 has a similar configuration to the front escape groove 70 formed in the front holding member 60. In addition, the pair of central rail claws 88 of the pair of central rail units 80 have a similar configuration to the pair of front rail claws 72 of the pair of front rail units 62.

[0060] The central holding member 78, the pair of central rail units 80, one central terminal member unit 82, and one central support member 84 constitute a central battery mounting portion 90. That is, the central battery mounting unit 46 includes a plurality of (four in this embodiment) central battery mounting portions 90. The four central battery mounting portions 90 are arranged side by side in the left-right direction. A battery pack BP (see FIG. 2) is detachably attached to the central battery mounting portion 90. When each of the multiple battery packs BP is attached to the central battery mounting portion 90, the multiple battery packs BP are arranged side by side in the left-right direction. As shown in FIG. 9, when the battery pack BP is attached to the central battery mounting portion 90, the battery pack BP passes through the upper opening 12 of the case 6 and protrudes upward from the case 6. For this reason, the user can easily grasp the battery pack BP with his or her hand. A protruding length Lb2 by which the battery pack BP attached to the central battery mounting portion 90 protrudes from the case 6 is shorter than a protruding length Lb1 by which the battery pack BP attached to the front battery mounting portion 68 protrudes from the case 6. The protruding length Lb2 is, for example, 45 mm or more, 50 mm or more, or 55 mm or more. The protruding length Lb2 is shorter than the protruding length Lb1 by a height H1 (see FIG. 7). The difference between the protruding length Lb2 and the protruding length Lb1 is, for example, 3 mm, 5 mm, 10 mm, or 20 mm. When the battery pack BP is attached to the central battery attachment portion 90, the battery pack BP is inclined with respect to the orthogonal plane P2. The inclination angle of the battery pack BP is approximately the same as the inclination angle of the rear surface of the central holding member 78.

[0061] 10, a central support stand 92 is disposed in front of the central support member 84. The central support stand 92 protrudes upward from the upper surface 58 of the base body 50. When the battery pack BP is attached to the central battery mounting portion 90, the central support stand 92 abuts against the lower end of the battery pack BP to support the battery pack BP from below.

[0062] The rear battery mounting unit 48 is fixed to the rear mounting member 56 from the rear side. The rear battery mounting unit 48 is disposed rearward of the central battery mounting unit 46. Therefore, the front battery mounting unit 44, the central battery mounting unit 46, and the rear battery mounting unit 48 are aligned in the front-rear direction. The front-rear direction is substantially the same as the direction in which the front battery mounting unit 44, the central battery mounting unit 46, and the rear battery mounting unit 48 are aligned. As shown in FIG. 11, the rear battery mounting unit 48 is disposed forward of the cover mounting portion 14 of the case 6. When the case cover 8 is in the closed position, the rear battery mounting unit 48 is disposed forward of the case cover 8. As shown in FIG. 9, the rear battery mounting unit 48 is partially accommodated in the case 6. The rear battery mounting unit 48 passes through the upper opening 12 of the case 6 and protrudes upward from the case 6. A protruding length La3 by which the rear battery mounting unit 48 protrudes from the case 6 is shorter than a protruding length La2 by which the central battery mounting unit 46 protrudes from the case 6. The protruding length La3 is, for example, 10 mm or more, 15 mm or more, or 20 mm or more. The protruding length La3 is shorter than the protruding length La2 by a height H2 (see FIG. 7). The difference between the protruding length La3 and the protruding length La2 is, for example, 3 mm, 5 mm, 10 mm, or 20 mm. The protruding lengths protruding from the case 6 are shorter in the order of the front battery mounting unit 44, the central battery mounting unit 46, and the rear battery mounting unit 48.

[0063] As shown in FIG. 8, the rear battery mounting unit 48 has a similar configuration to the front battery mounting unit 44. The rear battery mounting unit 48 includes a rear holding member 96, a plurality of pairs (four pairs in this embodiment) of rear rail units 98, a plurality (four in this embodiment) of rear terminal member units 100, and a plurality (four in this embodiment) of rear support members 102. The rear holding member 96 has a similar configuration to the front holding member 60, the pair of rear rail units 98 has a similar configuration to the pair of front rail units 62, the rear terminal member units 100 has a similar configuration to the front terminal member units 64, and the rear support member 102 has a similar configuration to the front support member 66. In addition, the rear escape groove 104 formed in the rear holding member 96 has a similar configuration to the front escape groove 70 formed in the front holding member 60. Furthermore, the pair of rear rail claws 106 of the pair of rear rail units 98 have a similar configuration to the pair of front rail claws 72 of the pair of front rail units 62 .

[0064] The rear holding member 96, the pair of rear rail units 98, one rear terminal member unit 100, and one rear support member 102 constitute a rear battery mounting portion 108. That is, the rear battery mounting unit 48 includes a plurality of (four in this embodiment) rear battery mounting portions 108. The four rear battery mounting portions 108 are arranged side by side in the left-right direction. A battery pack BP (see FIG. 2) is detachably attached to the rear battery mounting portion 108. When each of the battery packs BP is attached to the rear battery mounting portion 108, the battery packs BP are arranged side by side in the left-right direction. As shown in FIG. 9, when the battery pack BP is attached to the rear battery mounting portion 108, the battery pack BP passes through the upper opening 12 of the case 6 and protrudes upward from the case 6. This allows the user to easily grasp the battery pack BP with his or her hand. A protruding length Lb3 of the battery pack BP attached to the rear battery mounting portion 108 protruding from the case 6 is shorter than a protruding length Lb2 of the battery pack BP attached to the central battery mounting portion 90 protruding from the case 6. The protruding length Lb3 is, for example, 40 mm or more, 45 mm or more, or 50 mm or more. The protruding length Lb3 is shorter than the protruding length Lb2 by a height H2 (see FIG. 7). The difference between the protruding length Lb3 and the protruding length Lb2 is, for example, 3 mm, 5 mm, 10 mm, or 20 mm. The protruding lengths of the battery packs BP attached to the front battery mounting unit 44, the battery packs BP attached to the central battery mounting unit 46, and the battery packs BP attached to the rear battery mounting unit 48 are shorter in this order. Therefore, a user can easily remove the battery pack BP from the storage box 2 by standing at the front side of the storage box 2 (the side opposite the case cover 8 (see Figure 11) from the battery mounting unit 36) and first removing the battery pack BP attached to the front battery mounting unit 44, then removing the battery pack BP attached to the central battery mounting unit 46, and finally removing the battery pack BP attached to the rear battery mounting unit 48.When the battery pack BP is attached to the rear battery attachment portion 108, the battery pack BP is inclined with respect to the orthogonal plane P2. The inclination angle of the battery pack BP is substantially the same as the inclination angle of the rear surface of the rear holding member 96.

[0065] 10, a rear support stand 110 is disposed in front of the rear support member 102. The rear support stand 110 protrudes upward from the upper surface 58 of the base body 50. When the battery pack BP is attached to the rear battery mounting portion 108, the rear support stand 110 abuts against the lower end of the battery pack BP and supports the battery pack BP from below.

[0066] The following describes the detailed configurations of the front terminal member unit 64, the central terminal member unit 82, and the rear terminal member unit 100. Since the front terminal member unit 64, the central terminal member unit 82, and the rear terminal member unit 100 have similar configurations, the following description will be given taking the rear terminal member unit 100 as an example. As shown in Fig. 12, the rear terminal member unit 100 includes a plurality of (two in this embodiment) metallic charging terminal members 120 and a plurality of (four in this embodiment) metallic communication terminal members 122.

[0067] The charging terminal member 120 and the communication terminal member 122 are directly fixed to the rear holding member 96 by insert molding. The charging terminal member 120 and the communication terminal member 122 protrude rearward from the rear holding member 96. The length by which the charging terminal member 120 protrudes from the rear holding member 96 is substantially the same as the length by which the communication terminal member 122 protrudes from the rear holding member 96. In the up-down direction, the charging terminal member 120 and the communication terminal member 122 are disposed between the rear relief groove 104 and the rear support member 102.

[0068] The charging terminal member 120 is a terminal for passing a charging current to the battery pack BP (see FIG. 2). The two charging terminal members 120 are arranged side by side in the left-right direction. The communication terminal member 122 is a terminal for communication between the control unit 38 (see FIG. 7) and the battery pack BP. In the left-right direction, the four communication terminal members 122 are arranged between the two charging terminal members 120. The four communication terminal members 122 include two upper communication terminal members 124 arranged side by side in the left-right direction and two lower communication terminal members 126 arranged side by side in the left-right direction. The upper communication terminal member 124 is arranged side by side with the lower communication terminal member 126 in the up-down direction. The two lower communication terminal members 126 are arranged side by side with the two charging terminal members 120 in the left-right direction.

[0069] As shown in FIG. 13, the charging terminal member 120 includes a straight portion 130 and an insertion portion 132. The straight portion 130 and the insertion portion 132 are exposed to the outside of the rear holding member 96. The straight portion 130 extends along the mounting direction D1. The width of the straight portion 130 in the left-right direction is constant in the mounting direction D1. The insertion portion 132 is connected to one end of the straight portion 130. The width of the insertion portion 132 in the left-right direction becomes shorter as it moves away from the straight portion 130. The length Lt1 of the insertion portion 132 in the mounting direction D1 is, for example, 100% or less, 90% or less, 80% or less, 70% or less, or 65% or less of the length Lt2 of the straight portion 130 in the mounting direction D1. In addition, the length Lt1 is, for example, 20% or more, 25% or more, 30% or more, or 35% or more of the length Lt2. Furthermore, the length Lt1 is, for example, 55% or less, 50% or less, 45% or less, or 40% or less of the length Lt3 of the charging terminal member 120 in the mounting direction D1. Moreover, the length Lt1 is, for example, 20% or more, 25% or more, 30% or more, or 35% or more of the length Lt3.

[0070] Moreover, the length Lt3 of the charging terminal member 120 is 100% or more of the length Lt4 of the lower communication terminal member 126 in the mounting direction D1. The length Lt4 is the length of the portion of the lower communication terminal member 126 exposed from the rear holding member 96. Furthermore, the length Lt3 is, for example, 150% or less, 140% or less, 130% or less, or 125% or less of the length Lt4. The length Lt4 of the lower communication terminal member 126 is approximately the same as the length Lt5 of the upper communication terminal member 124 in the mounting direction D1. The length Lt5 is the length of the portion of the upper communication terminal member 124 exposed from the rear holding member 96.

[0071] The upper communication terminal member 124 has a shape similar to that of the lower communication terminal member 126. The upper communication terminal member 124 includes a base portion 134 and an insertion portion 136. The base portion 134 and the insertion portion 136 are exposed to the outside of the rear holding member 96. The base portion 134 extends along the mounting direction D1. The insertion portion 136 is connected to one end of the base portion 134. The width of the insertion portion 136 in the left-right direction decreases as it moves away from the base portion 134. The length Lt6 of the insertion portion 136 in the mounting direction D1 is 40% or less, 35% or less, 30% or less, 25% or less, or 20% or less of the length Lt5 of the upper communication terminal member 124. The length Lt6 is 5% or more, 10% or more, or 15% or more of the length Lt5. Furthermore, the length Lt6 is shorter than the length Lt1 of the plug-in portion 132 of the charging terminal member 120. The taper angle of the plug-in portion 136 of the upper communication terminal member 124 is larger than the taper angle of the plug-in portion 132 of the charging terminal member 120.

[0072] Next, the battery pack BP shown in FIG. 14 will be described. The battery pack BP is attached to a battery attachment portion 202 of the electric device 200 and used. In FIG. 14, the electric device 200 is illustrated by a broken line. The electric device 200 may be an electric device that operates by power supplied from the battery pack BP. The electric device 200 may be, for example, an electric tool using a motor as a power source, such as a screwdriver or a drill, or an electric work machine using a motor as a power source, such as a grass cutter or a blower. Alternatively, the electric device 200 may be an electric device that does not include a motor, such as a light, a radio, or a speaker. Alternatively, the electric device 200 may be a charger that supplies power to the battery pack BP. In the battery pack BP, the rated voltage is, for example, 36 V, the maximum voltage is, for example, 40 V, and the rated capacity is, for example, 2.5 Ah. In addition, in the battery pack BP, the rated voltage may be, for example, 36 V, the maximum voltage is, for example, 40 V, and the rated capacity is, for example, 4.0 Ah. Furthermore, the battery pack BP may have a rated voltage of, for example, 36 V, a maximum voltage of, for example, 40 V, and a rated capacity of, for example, 5.0 Ah. The battery pack BP may have a rated voltage of, for example, 36 V, a maximum voltage of, for example, 40 V, and a rated capacity of, for example, 8.0 Ah. The weight of the battery pack BP is, for example, 2 kg or less.

[0073] 15, the battery pack BP includes a casing 140, a pair of mounting rail units 142, a hook 144, and a battery terminal member unit 146 (see FIG. 16). The casing 140 accommodates a secondary battery, for example, a lithium ion battery, therein.

[0074] The pair of mounting rail units 142 protrude from the front surface of the casing 140. The pair of mounting rail units 142 extend in a substantially vertical direction along the front surface of the casing 140. The pair of mounting rail units 142 include a pair of mounting rail claws 148 that protrude in a direction away from each other. The pair of mounting rail claws 148 extend in a substantially vertical direction along the front surface of the casing 140. When the battery pack BP is attached to the battery mounting unit 36 ​​(see FIG. 8), the pair of mounting rail claws 148 engage with the pair of front rail claws 72 (see FIG. 8), the pair of central rail claws 88 (see FIG. 8), or the pair of rear rail claws 106 (see FIG. 8) of the storage box 2. In addition, a pair of equipment rail claws (not shown) extending in the battery mounting direction are formed in the battery mounting portion 202 (see FIG. 14) of the electric equipment 200, and when the battery pack BP is attached to the battery mounting portion 202, the pair of mounting rail claws 148 engage with the pair of equipment rail claws. When the battery pack BP is slid relative to the battery mounting section 202 in the battery mounting direction, the pair of mounting rail claws 148 engage with the pair of equipment rail claws, and the battery pack BP is attached to the battery mounting section 202. When the pair of mounting rail claws 148 engage with the pair of equipment rail claws, the battery pack BP can slide relative to the battery mounting section 202 only in the battery mounting direction and the battery removal direction opposite to the battery mounting direction, but cannot slide in a direction different from the battery mounting direction and the battery removal direction, for example, a direction perpendicular to the battery mounting direction. Furthermore, when the battery pack BP attached to the battery mounting section 202 is slid relative to the battery mounting section 202 in the battery removal direction, the pair of mounting rail claws 148 disengage from the pair of equipment rail claws, and the battery pack BP is removed from the battery mounting section 202.

[0075] The hook 144 is movably attached to the casing 140. The hook 144 includes an engagement portion 150 and an operation portion 152. The engagement portion 150 is disposed between a pair of mounting rail units 142. The engagement portion 150 is, for example, an engagement claw. As shown in FIG. 14, an engagement recess 204 is formed in the battery mounting portion 202 of the electric device 200, and the engagement portion 150 can engage with the engagement recess 204. The engagement portion 150 usually protrudes to the outside of the casing 140. The engagement portion 150 can move into the inside of the casing 140. The engagement portion 150 also includes a guide portion 154 that is inclined at an acute angle with respect to the front surface of the casing 140. As shown in FIG. 15, the operation portion 152 is formed integrally with the engagement portion 150. The operation portion 152 is attached to the casing 140 so as to be able to be pushed into the casing 140. When the operating unit 152 is operated by the user and pushed into the casing 140, the entire engaging unit 150 moves into the casing 140. When the operating unit 152 is no longer operated in a state in which the operating unit 152 is pushed into the casing 140, the operating unit 152 returns to its initial position due to the biasing force of a biasing spring (not shown). As a result, the engaging unit 150 returns to its initial state in which it protrudes outside the casing 140.

[0076] The movement of the hook 144 when the battery pack BP is attached to or detached from the battery mounting portion 202 will be described. As shown in FIG. 14, when the battery pack BP is slid relative to the battery mounting portion 202 in the battery mounting direction, the engaging portion 150 is gradually pushed into the casing 140 by the guide portion 154 coming into contact with the battery mounting portion 202. When the engaging portion 150 reaches the engaging recess 204, the guide portion 154 is no longer in contact with the battery mounting portion 202, and the engaging portion 150 returns to its initial state by the biasing force of the biasing spring (not shown) and engages with the engaging recess 204. In a state in which the engaging portion 150 is engaged with the engaging recess 204, the battery pack BP cannot be slid relative to the battery mounting portion 202 in the battery removal direction, i.e., the battery pack BP cannot be removed from the battery mounting portion 202.

[0077] 15 is pushed into the casing 140 by the user. This causes the engaging portion 150 to move into the casing 140, and the engaging portion 150 is disengaged from the engaging recess 204. With the operating portion 152 pushed into the casing 140, the battery pack BP is slid relative to the battery mounting portion 202 in the battery removal direction, causing the pair of mounting rail claws 148 to disengage from the pair of equipment rail claws of the battery mounting portion 202, and the battery pack BP is removed from the battery mounting portion 202.

[0078] The battery terminal member unit 146 will be described. As shown in Fig. 15, a plurality of terminal grooves 156 are disposed between a pair of mounting rail claws 148, and the battery terminal member unit 146 (see Fig. 16) is disposed in the terminal grooves 156. The battery terminal member unit 146 shown in Fig. 16 is disposed in the casing 140 (see Fig. 15). The battery terminal member unit 146 includes a plurality of (two in this embodiment) metallic battery charging terminal members 160, and a plurality of (four in this embodiment) metallic battery communication terminal members 162.

[0079] The battery charging terminal member 160 includes four charging clamps 164. The four charging clamps 164 are arranged in a row. The four charging clamps 164 are integrally formed. The battery charging terminal member 160 is configured so that at least one of the four charging clamps 164 sandwiches the other terminal member, thereby electrically connecting the other terminal member. Hereinafter, the two charging clamps 164 arranged on the upper side of the four charging clamps 164 may be referred to as upper charging clamps 166, and the two charging clamps 164 arranged on the lower side of the four charging clamps 164 may be referred to as lower charging clamps 168. The lower charging clamps 168 are arranged on the mounting direction D1 side of the upper charging clamps 166.

[0080] The battery communication terminal members 162 are configured to be electrically connected to the other terminal members by sandwiching the other terminal members. The four battery communication terminal members 162 include two upper battery communication terminal members 172 arranged side by side in the left-right direction, and two lower battery communication terminal members 174 arranged side by side in the left-right direction. The two upper battery communication terminal members 172 are arranged between the upper charging clamp portion 166 of one battery charging terminal member 160 and the upper charging clamp portion 166 of the other battery charging terminal member 160. The two lower battery communication terminal members 174 are arranged between the lower charging clamp portion 168 of one battery charging terminal member 160 and the lower charging clamp portion 168 of the other battery charging terminal member 160.

[0081] The procedure for attaching the battery pack BP to the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108) (see FIG. 8) will be described. First, the battery pack BP (see FIG. 15) is placed on the upper side of the front holding member 60 (or the central holding member 78 or the rear holding member 96) (see FIG. 8), and is slid in the attachment direction D1 (see FIG. 12) along the front holding member 60 (or the central holding member 78 or the rear holding member 96) by the weight of the battery pack BP. The charging terminal member 120 of the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108) shown in FIG. 17 is inserted between the lower charging clamp portions 168 from below the lower charging clamp portions 168 of the battery pack BP. At this time, first, the plug-in portion 132 of the charging terminal member 120 is inserted between the lower charging clamp portions 168, and then the straight portion 130 of the charging terminal member 120 is inserted between the lower charging clamp portions 168. Since the taper angle of the plug-in portion 132 is smaller than the taper angle of the plug-in portion 136 (see FIG. 13) of the communication terminal member 124, the plug-in portion 132 is more easily inserted between the lower charging clamp portions 168 than the plug-in portion 136. In FIG. 17, the boundary between the straight portion 130 and the plug-in portion 132 is illustrated by a broken line. When the plug-in portion 132 passes through the charging clamp portion 164 arranged at the lowest position and is slightly inserted into the charging clamp portion 164 arranged second from the bottom, the battery pack BP reaches the mounting position. At this time, the charging terminal member 120 is electrically connected to the battery charging terminal member 160. In this embodiment, since the charging terminal member 120 is inserted into the entirety of one charging clamp portion 164 and only a part of the other charging clamp portion 164, the battery pack BP moves to the mounting position due to its own weight. As shown in Fig. 11, when the battery pack BP reaches the mounting position, the lower end of the battery pack BP abuts against the front support base 74 (or the central support base 92 or the rear support base 110), and a pair of mounting rail units 142 (see Fig. 15) of the battery pack BP abuts against the front support member 66 (or the central support member 84 or the rear support member 102) (see Fig. 10). This makes it impossible for the battery pack BP to slide further in the mounting direction D1.Therefore, as shown in FIG. 17, the charging terminal member 120 does not pass between the upper charging clamp portions 166 when the battery pack BP is attached.

[0082] Furthermore, when the battery pack BP is in the mounting position, the charging terminal member 120 is clamped only by the lower charging clamp portions 168 (two charging clamp portions 164). In a configuration in which the charging terminal member 120 is longer than the charging terminal member 120 of this embodiment and is clamped between four charging clamp portions 164, the battery pack BP is charged at a high speed, whereas in a configuration in which the charging terminal member 120 is clamped between only two charging clamp portions 164 as in this embodiment, the battery pack BP is charged over a long period of time (e.g., eight hours). For this reason, for example, if charging of the battery pack BP is started the night before the battery pack BP is used, charging of the battery pack BP will be completed by the morning of the day on which the battery pack BP is used, and the battery pack BP can be charged efficiently.

[0083] Although not shown, the upper communication terminal member 124 (see FIG. 12) of the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108) is inserted into the lower battery communication terminal member 174 shown in FIG. 16 from the insertion portion 136 (see FIG. 13). Next, the upper communication terminal member 124 comes out of the lower battery communication terminal member 174 and is inserted into the upper battery communication terminal member 172. When the upper communication terminal member 124 is inserted into the upper battery communication terminal member 172, the battery pack BP reaches the mounting position. At this time, the upper communication terminal member 124 is electrically connected to the upper battery communication terminal member 172. Furthermore, although not shown, the lower communication terminal member 126 (see FIG. 12) of the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108) is inserted into the lower battery communication terminal member 174. When the lower communication terminal member 126 is inserted into the lower battery communication terminal member 174, the battery pack BP reaches the mounting position. At this time, the lower communication terminal member 126 is electrically connected to the lower battery communication terminal member 174.

[0084] Furthermore, when the battery pack BP is slid in the mounting direction D1, the engaging portion 150 of the battery pack BP shown in Figs. 18 and 19 enters the front escape groove 70 (or the central escape groove 86 or the rear escape groove 104) from above. When the battery pack BP reaches the mounting position, the engaging portion 150 is disposed in the front escape groove 70 (or the central escape groove 86 or the rear escape groove 104). Since the front escape groove 70, the central escape groove 86, and the rear escape groove 104 have similar shapes, the relationship between the engaging portion 150 and the front escape groove 70 will be described below as an example.

[0085] The width W1 of the engagement portion 150 in the left-right direction is shorter than the width W2 of the front escape groove 70 in the left-right direction. Therefore, in the left-right direction, the engagement portion 150 is separated from the front holding member 60 in the front escape groove 70. Furthermore, when the engagement portion 150 is in the initial position, the protruding length Lp1 of the engagement portion 150 protruding from the casing 140 is shorter than the width W3 between the casing 140 and the front holding member 60 in the front escape groove 70. Therefore, in the front-rear direction, the engagement portion 150 is separated from the front holding member 60 in a state in which the guide portion 154 faces the front holding member 60 in the front escape groove 70. Furthermore, in the up-down direction, the engagement portion 150 is separated from the front holding member 60 in the front escape groove 70. Moreover, the front battery mounting portion 68 is located at a position where it overlaps with the engaging portion 150 in the vertical direction (or the mounting direction D1), and is not disposed on the side of the engaging portion 150 in the removal direction D2. Therefore, the engaging portion 150 is not in contact with the front holding member 60, and is not engaged with the front holding member 60. Therefore, the battery pack BP is mounted to the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108) without the engaging portion 150 engaging. Furthermore, when the battery pack BP is mounted to the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108), the guide portion 154 of the engaging portion 150 does not come into contact with the front holding member 60, and therefore the engaging portion 150 is not pushed into the casing 140.

[0086] When the battery pack BP reaches the mounting position, that is, when the battery pack BP is mounted on the front battery mounting portion 68 (or the central battery mounting portion 90 or the rear battery mounting portion 108), the battery pack BP becomes chargeable. When the battery pack BP is being charged, it is necessary to maintain the battery pack BP in the mounting position. For this reason, as shown in FIG. 20, the storage box 2 further includes a cushioning material 180. The cushioning material 180 is made of an elastic material, for example, a rubber material. The cushioning material 180 has a substantially flat plate shape. The cushioning material 180 is attached to the inner upper surface 8e inside the case cover 8. When the case cover 8 is in the closed position, the cushioning material 180 is sandwiched between the battery pack BP and the case cover 8. As a result, the battery pack BP is maintained in the mounting position by the case cover 8 and the cushioning material 180. When the battery pack BP is in the mounting position, the contact surface 180a of the cushioning material 180 comes into contact with the battery pack BP. The contact surface 180a is the surface opposite to the surface of the cushioning material 180 that is attached to the case cover 8.

[0087] The cushioning material 180 includes a front contact portion 182, a central contact portion 184, and a rear contact portion 186. When the case cover 8 is in the closed position, the front contact portion 182, the central contact portion 184, and the rear contact portion 186 are arranged side by side in the front-rear direction. When the case cover 8 is in the closed position, the front contact portion 182 is arranged in a position facing the battery pack BP attached to the front battery mounting unit 44, the central contact portion 184 is arranged in a position facing the battery pack BP attached to the central battery mounting unit 46, and the rear contact portion 186 is arranged in a position facing the battery pack BP attached to the rear battery mounting unit 48. When the case cover 8 is in the closed position, the front contact portion 182 is sandwiched between the battery pack BP mounted to the front battery mounting unit 44 and the case cover 8, the central contact portion 184 is sandwiched between the battery pack BP mounted to the central battery mounting unit 46 and the case cover 8, and the rear contact portion 186 is sandwiched between the battery pack BP mounted to the rear battery mounting unit 48 and the case cover 8.

[0088] The thickness of the cushioning material 180 (the width between the contact surface 180a and the inner upper surface 8e of the case cover 8) is the thinnest at the front contact portion 182 and the thickest at the rear contact portion 186. When the case cover 8 is in the closed position, the contact surface 180a is disposed at the uppermost position at the front contact portion 182 and at the lowermost position at the rear contact portion 186. The height H3 between the contact surface 180a at the front contact portion 182 and the contact surface 180a at the central contact portion 184 is substantially the same as the height H4 between the contact surface 180a at the central contact portion 184 and the contact surface 180a at the rear contact portion 186. The height H3 is substantially the same as the height H1 between the front upper surface 58a and the central upper surface 58b of the base body 50. The height H4 is substantially the same as the height H2 between the central upper surface 58b and the rear upper surface 58c of the base body 50.

[0089] When the case cover 8 is in the closed position, the cushioning material 180 is pressed against the battery pack BP. As shown in FIG. 21, the cushioning material 180 is pressed into the battery pack BP by elastic deformation. In FIG. 21, the thickness of the cushioning material 180 and the vertical length of the battery pack BP are exaggerated. A pressing depth Dp1 to which the front contact portion 182 is pressed by the battery pack BP is approximately equal to a pressing depth Dp2 to which the center contact portion 184 is pressed by the battery pack BP and a pressing depth Dp3 to which the rear contact portion 186 is pressed by the battery pack BP. Therefore, the multiple battery packs BP are pressed into the mounting position by the cushioning material 180 with a uniform force.

[0090] (effect) The storage box 2 of this embodiment can charge the battery pack BP that is attached to the electric device 200 while it is stored therein. The storage box 2 includes a case 6 and a plurality of battery mounting units 36 supported by the case 6. The battery pack BP is detachably attached to each of the plurality of battery mounting units 36. The battery pack BP includes a hook 144 (an example of an engaging member) that engages with the electric device 200 when the battery pack BP is attached to the electric device 200, and the hook 144 is disengaged from the electric device 200 by a user's operation on the hook 144. The battery mounting unit 36 ​​includes terminal member units 64, 82, 100 that are electrically connected to the battery pack BP when the battery pack BP is attached to the battery mounting unit 36, and holding members 60, 78, 96 that hold the terminal member units 64, 82, 100. The holding members 60, 78, 96 do not engage with the hook 144 of the battery pack BP when the battery pack BP is attached to the battery mounting unit 36.

[0091] According to the above configuration, when the battery pack BP is attached to the battery mounting unit 36, the hook 144 of the battery pack BP does not engage with the holding members 60, 78, 96 of the battery mounting unit 36. Therefore, when removing the battery pack BP from the battery mounting unit 36, it is not necessary to disengage the hook 144 from the holding members 60, 78, 96. This makes it possible to easily remove the battery pack BP from the battery mounting unit 36.

[0092] Furthermore, when the battery pack BP is attached to the battery mounting unit 36, the holding members 60, 78, 96 are separated from the hooks 144 of the battery pack BP.

[0093] According to the above-mentioned configuration, the hooks 144 of the battery pack BP can be prevented from engaging with the holding members 60, 78, 96 of the battery mounting unit 36 ​​with a simple configuration.

[0094] The battery pack BP also includes a battery charging terminal member 160 and a battery communication terminal member 162. The terminal member units 64, 82, 100 include a charging terminal member 120 that is electrically connected to the battery charging terminal member 160 of the battery pack BP when the battery pack BP is attached to the battery mounting unit 36, and a communication terminal member 122 that is electrically connected to the battery communication terminal member 162 of the battery pack BP when the battery pack BP is attached to the battery mounting unit 36. The battery pack BP is attached to the battery mounting unit 36 ​​by moving in the mounting direction D1 relative to the battery mounting unit 36. The length Lt3 of the charging terminal member 120 of the terminal member units 64, 82, 100 in the mounting direction D1 is 150% or less of the lengths Lt4, Lt5 of the communication terminal members 122 of the terminal member units 64, 82, 100 in the mounting direction D1.

[0095] If the length Lt3 of the charging terminal member 120 of the terminal member units 64, 82, 100 in the mounting direction D1 is greater than 150% of the lengths Lt4, Lt5 of the communication terminal members 122 of the terminal member units 64, 82, 100 in the mounting direction D1, the battery pack BP is difficult to mount to the battery mounting unit 36 ​​due to frictional force acting between the battery charging terminal member 160 of the battery pack BP and the charging terminal member 120 of the terminal member units 64, 82, 100. According to the above configuration, it is possible to make it easier to mount the battery pack BP to the battery mounting unit 36.

[0096] Further, the charging terminal member 120 of the terminal member unit 64, 82, 100 includes a straight portion 130 extending along the mounting direction D1, and an insertion portion 132 connected to the end of the straight portion 130 and tapering away from the straight portion 130. When the battery pack BP moves in the mounting direction D1 relative to the battery mounting unit 36, the insertion portion 132 is inserted into the battery charging terminal member 160 of the battery pack BP before the straight portion 130. The length Lt1 of the insertion portion 132 in the mounting direction D1 is 20% or more of the length Lt3 of the charging terminal member 120 in the mounting direction D1.

[0097] When the length Lt1 of the insertion portion 132 in the mounting direction D1 is less than 20% of the length Lt3 of the charging terminal member 120 in the mounting direction D1, the battery pack BP is difficult to mount to the battery mounting unit 36 ​​due to frictional force acting between the battery charging terminal member 160 of the battery pack BP and the insertion portion 132. According to the above configuration, it is possible to make it easier to mount the battery pack BP to the battery mounting unit 36.

[0098] Furthermore, the length Lt3 of the charging terminal member 120 of the terminal member units 64, 82, 100 in the mounting direction D1 is shorter than the length of the battery charging terminal member 160 of the battery pack BP in the mounting direction D1. The battery charging terminal member 160 of the battery pack BP includes an upper charging clamp portion 166 (an example of a first clamp portion) capable of clamping the charging terminal member 120, and a lower charging clamp portion 168 (an example of a second clamp portion) capable of clamping the charging terminal member 120 and disposed on the mounting direction D1 side of the upper charging clamp portion 166. When the battery pack BP is mounted to the battery mounting unit 36, the charging terminal member 120 of the terminal member units 64, 82, 100 is clamped by the lower charging clamp portion 168 without passing through the upper charging clamp portion 166.

[0099] In a typical battery pack BP, the battery charging terminal member 160 is designed to be long so that the battery pack BP can be charged quickly. In a configuration in which the battery pack BP does not need to be charged quickly, the charging terminal member 120 of the terminal member unit 64, 82, 100 may be configured to contact only a portion of the battery charging terminal member 160. If the charging terminal member 120 of the terminal member unit 64, 82, 100 is configured to be sandwiched by the upper charging clamp portion 166, when the battery pack BP is to be attached to the battery mounting unit 36, the charging terminal member 120 is sandwiched by the lower charging clamp portion 168, passes through the lower charging clamp portion 168, and is then sandwiched by the upper charging clamp portion 166. According to the above configuration, when the battery pack BP is attached to the battery mounting unit 36, the charging terminal member 120 is sandwiched by the lower charging clamp portion 168 without passing through the upper charging clamp portion 166. This makes it easier to attach the battery pack BP to the battery mounting unit 36 ​​compared to a configuration in which the charging terminal member 120 of the terminal member units 64, 82, 100 is clamped by the upper charging clamp portion 166.

[0100] Furthermore, the battery pack BP is located at the mounting position when it is attached to the battery mounting unit 36. When the battery pack BP is attached to the battery mounting unit 36, the battery pack BP moves to the mounting position due to its own weight.

[0101] According to the above configuration, the battery pack BP can be easily attached to the battery mounting unit 36.

[0102] The storage box 2 can be placed on the placement surface P1. When the storage box 2 is placed on the placement surface P1 and the battery pack BP is attached to the battery mounting unit 36, the battery pack BP is inclined with respect to an orthogonal plane P2 that is orthogonal to the placement surface P1.

[0103] According to the above configuration, the battery pack BP can be easily removed from the battery mounting unit .

[0104] The storage box 2 can be placed on the placement surface P1. The case 6 has a box shape with an upper opening 12 that opens at the top, and contains at least a part of each of the plurality of battery mounting units 36. The plurality of battery mounting units 36 include a front battery mounting unit 44 (an example of a first battery mounting unit) and a central battery mounting unit 46 (an example of a second battery mounting unit) that is disposed away from the front battery mounting unit 44 in the rear direction (an example of a first direction) along the placement surface P1. When the battery pack BP is attached to the front battery mounting unit 44, the battery pack BP protrudes from the inside of the case 6 to the outside through the upper opening 12. When the battery pack BP is attached to the central battery mounting unit 46, the battery pack BP protrudes from the inside of the case 6 to the outside through the upper opening 12. The length Lb1 by which the battery pack BP attached to the front battery mounting unit 44 protrudes from the case 6 is longer than the length Lb2 by which the battery pack BP attached to the central battery mounting unit 46 protrudes from the case 6.

[0105] When the battery pack BP protrudes from the case 6, the user can easily grasp the battery pack BP with his / her hands. According to the above configuration, when the battery pack BP is attached to each of the front battery mounting unit 44 and the central battery mounting unit 46, the user can easily remove the battery pack BP from the front battery mounting unit 44 by grasping the battery pack BP with his / her hands.

[0106] Furthermore, each of the front battery mounting unit 44 and the central battery mounting unit 46 protrudes from the inside to the outside of the case 6 through the upper opening 12. A protruding length La1 by which the front battery mounting unit 44 protrudes from the case 6 is longer than a protruding length La2 by which the central battery mounting unit 46 protrudes from the case 6.

[0107] According to the above configuration, when the battery pack BP is attached to each of the front battery mounting unit 44 and the central battery mounting unit 46, the user can grasp the battery pack BP with his or her hands and more easily remove the battery pack BP from the front battery mounting unit 44.

[0108] The storage box 2 further includes a case cover 8 capable of closing the upper opening 12 of the case 6. The case cover 8 is attached to the case 6 so as to be movable relative to the case 6, and moves between a closed position that closes the upper opening 12 of the case 6 and an open position that opens the upper opening 12 of the case 6. When in the open position, the case cover 8 is disposed rearward of the central battery mounting unit 46.

[0109] When the case cover 8 is in the open position, a user stands on the opposite side of the central battery mounting unit 46 from the case cover 8 and attempts to remove the battery pack BP from the battery mounting unit 36. According to the above configuration, when the battery pack BP is attached to both the front battery mounting unit 44 and the central battery mounting unit 46, the battery pack BP can be more easily removed from the front battery mounting unit 44.

[0110] The storage box 2 further includes a case cover 8 capable of closing the upper opening 12 of the case 6, and a cushioning material 180 made of an elastic material attached to the case cover 8. When the case cover 8 closes the upper opening 12 of the case 6, the cushioning material 180 is sandwiched between the battery pack BP attached to the front battery mounting unit 44 and the case cover 8, and is also sandwiched between the battery pack BP attached to the central battery mounting unit 46 and the case cover 8. A pushing depth Dp1 to which the cushioning material 180 is pushed into the battery pack BP attached to the front battery mounting unit 44 is substantially the same as a pushing depth Dp2 to which the cushioning material 180 is pushed into the battery pack BP attached to the central battery mounting unit 46.

[0111] According to the above configuration, the force acting from the cushioning material 180 on the battery pack BP attached to the front battery mounting unit 44 is substantially the same as the force acting from the cushioning material 180 on the battery pack BP attached to the central battery mounting unit 46. As a result, when the case cover 8 closes the upper opening 12 of the case 6, the multiple battery packs BP can be maintained in predetermined positions while the forces acting from the cushioning material 180 on the multiple battery packs BP are substantially the same.

[0112] Moreover, the case 6 has a box shape with an upper opening 12 that is open at the top. The storage box 2 is further provided with a case cover 8 that is capable of closing the upper opening 12 of the case 6 and defines a storage space 18 between the case 6 and the case cover 8 when the upper opening 12 of the case 6 is closed. A plurality of battery mounting units 36 are disposed in the storage space 18. When the battery pack BP is attached to the battery mounting unit 36, the battery pack BP is located in the mounting position. The case cover 8 maintains the battery pack BP in the mounting position relative to the battery mounting unit 36 ​​when the upper opening 12 of the case 6 is closed.

[0113] According to the above configuration, when the case cover 8 closes the upper opening 12 of the case 6, the battery pack BP can be prevented from coming off the mounting position relative to the battery mounting unit .

[0114] The housing box 2 is further provided with a cushioning material 180 that is attached to the case cover 8 and is sandwiched between the battery pack BP and the case cover 8 when the case cover 8 closes the upper opening 12 of the case 6. The cushioning material 180 is made of an elastic material.

[0115] The size of the battery packs BP may differ between the battery packs BP due to manufacturing tolerances. In a configuration in which the cushioning material 180 does not elastically deform, when the case cover 8 closes the upper opening 12 of the case 6, an excessive force may act on a specific battery pack BP from the case cover 8. According to the above configuration, even if the size of the battery packs BP differs between the battery packs BP, the cushioning material 180 elastically deforms, thereby making it possible to prevent an excessive force from acting on a specific battery pack BP from the case cover 8.

[0116] The storage box 2 also includes a detection device 41 that detects that the case cover 8 is closing the upper opening 12 of the case 6, and a control unit 38. When the detection device 41 detects that the case cover 8 is closing the upper opening 12 of the case 6, the control unit 38 permits charging of the battery pack BP attached to the battery mounting unit 36.

[0117] If the battery pack BP is out of the mounting position, the battery pack BP cannot be charged normally. According to the above configuration, the battery pack BP is charged while being located in the mounting position, so that the battery pack BP can be charged normally.

[0118] (Modification) In one embodiment, the storage box 2 may include a power cord that can be directly connected to an external power source. In this configuration, the storage box 2 charges the battery pack BP with power supplied from the external power source via the power cord.

[0119] In the embodiment, the battery mounting unit 36 ​​includes three battery mounting units 44, 46, 48, but in a modified example, the number of battery mounting units 44, 46, 48 may be two, or may be four or more.

[0120] In one embodiment, the number of front battery mounting portions 68, the number of central battery mounting portions 90, and the number of rear battery mounting portions 108 may each be three or less, or may be five or more.

[0121] The storage box 2 according to one embodiment may further include a notification unit that notifies that charging of the battery pack BP is completed. The notification unit may be, for example, a display panel that displays a display indicating that charging of the battery pack BP is completed, an LED lamp that turns on or off when charging of the battery pack BP is completed, or a notification means that notifies a completion notification to a user's mobile terminal (e.g., a smartphone, etc.) when charging of the battery pack BP is completed.

[0122] The housing box 2 according to one embodiment does not necessarily have to include the cushioning material 180. At this time, the battery pack BP abuts against the case cover 8, so that it is maintained in the mounting position.

[0123] The charging terminal member 120 according to one embodiment may be clamped by only one charging clamp portion 164 .

[0124] The charging terminal member 120 according to one embodiment may be clamped between both the upper charging clamp portion 166 and the lower charging clamp portion 168 of the battery charging terminal member 160. In this case, the charging terminal member 120 is clamped between three or four charging clamp portions 164. In this configuration, the battery pack BP can be charged quickly (e.g., within a few hours).

[0125] The terminal member unit 64, 82, 100 according to an embodiment further includes a resin member to which the charging terminal member 120 and the communication terminal member 122 are fixed, and this resin member may be fixed to the holding member 60, 78, 96 by a screw or insert molding. In this case, the charging terminal member 120 and the communication terminal member 122 may be fixed to the resin member by insert molding or press fitting. [Explanation of symbols]

[0126] 2: Storage box 6: Case 8: Case cover 12: Upper opening 14: Cover mounting part 18: Containment space 36: Battery mounting unit 38: Control unit 41:Detection device 42: Bass 44: Front battery mounting unit 46: Central battery mounting unit 48: Rear battery mounting unit 50: Base body 52: Front mounting member 54: Central mounting member 56: Rear mounting member 60: Front holding member 64: Front terminal component unit 68: Front battery mounting area 70: Front relief groove 78: Central retaining member 82: Central terminal member unit 86: Central relief groove 90: Center battery mounting area 96: Rear retaining member 100: Rear terminal component unit 104: Rear relief groove 108: Rear battery mounting area 120: Charging terminal parts 122: Communication terminal parts 130: Straight section 132: Insertion part 140: Casing 144: Hook 146: Battery terminal component unit 150: Engagement part 152:Operation unit 160: Battery charging terminal parts 162: Battery communication terminal member 166: Upper charging clamp part 168: Lower charging clamp part 180: Cushioning material 200: Electrical equipment 202: Battery mounting section 204: Engagement recess BP: Battery pack D1: Installation direction D2:Removal direction Dp1, Dp2, Dp3: Indentation depth H1, H2, H3, H4: Height La1, La2, La3, Lb1, Lb2, Lb3, Lp1: Protrusion length Lt1, Lt2, Lt3, Lt4, Lt5: Length P1: Placement surface P2: Orthogonal plane W1, W2, W3: Width

Claims

1. A rechargeable storage box that houses a battery pack for use attached to an electrical device, comprising: a case; a plurality of battery mounting units supported by the case, wherein the battery pack is detachably attached to each of the plurality of battery mounting units, the battery pack is an engagement member that engages with the electrical device when attached to the electrical device, and the engagement with the electrical device is released by a user operation on the engagement member, the battery mounting unit comprises a terminal member unit electrically connected to the battery pack when the battery pack is attached to the battery mounting unit, and a holding member that holds the terminal member unit, wherein the holding member does not engage with the engagement member of the battery pack when the battery pack is attached to the battery mounting unit.

2. The storage box according to claim 1, wherein the holding member is separated from the engagement member of the battery pack when the battery pack is attached to the battery mounting unit.

3. The battery pack comprises a battery charging terminal member and a battery communication terminal member, the terminal member unit comprises a charging terminal member electrically connected to the battery charging terminal member of the battery pack when the battery pack is attached to the battery mounting unit, and a communication terminal member electrically connected to the battery communication terminal member of the battery pack when the battery pack is attached to the battery mounting unit, the battery pack is attached to the battery mounting unit by moving in the mounting direction with respect to the battery mounting unit, and the length of the charging terminal member of the terminal member unit in the mounting direction is 150% or less of the length of the communication terminal member of the terminal member unit in the mounting direction.

4. The charging terminal member of the terminal member unit comprises a straight portion extending along the mounting direction, and a plug portion connected to an end of the straight portion and becoming thinner as it moves away from the straight portion. When the battery pack moves in the mounting direction relative to the battery mounting unit, the insertion portion is inserted into the battery charging terminal member of the battery pack before the linear portion, The length of the insertion portion in the mounting direction is 20% or more of the length of the charging terminal member in the mounting direction. The housing box according to claim 3.

5. The length of the charging terminal member of the terminal member unit in the mounting direction is shorter than the length of the battery charging terminal member of the battery pack in the mounting direction. The battery charging terminal member of the battery pack, A first clamp portion capable of sandwiching the charging terminal member, A second clamp portion capable of sandwiching the charging terminal member and disposed on the mounting direction side of the first clamp portion. When the battery pack is attached to the battery mounting unit, the charging terminal member of the terminal member unit is sandwiched by the second clamp portion without passing through the first clamp portion. The housing box according to claim 3.

6. The battery pack is located at the mounting position when attached to the battery mounting unit. When attaching the battery pack to the battery mounting unit, the battery pack moves to the mounting position due to its own weight. The housing box according to claim 3.

7. The housing box can be placed on a placement surface. When the housing box is placed on the placement surface and the battery pack is attached to the battery mounting unit, the battery pack is inclined with respect to a plane orthogonal to the placement surface. The housing box according to any one of claims 1 to 6.

8. The housing box can be placed on a placement surface. The case has a box shape with an upper opening that is open at the top, and houses at least a part of each of the plurality of battery mounting units. The plurality of battery mounting units, A first battery mounting unit, A second battery mounting unit disposed apart from the first battery mounting unit in a first direction along the placement surface. When the battery pack is attached to the first battery attachment unit, the battery pack protrudes from the inside of the case to the outside through the upper opening. When the battery pack is attached to the second battery attachment unit, the battery pack protrudes from the inside of the case to the outside through the upper opening. The accommodation box according to claim 1, wherein a protruding length by which the battery pack attached to the first battery attachment unit protrudes from the case is longer than a protruding length by which the battery pack attached to the second battery attachment unit protrudes from the case.

9. Each of the first battery attachment unit and the second battery attachment unit protrudes from the inside of the case to the outside through the upper opening. The accommodation box according to claim 8, wherein a protruding length by which the first battery attachment unit protrudes from the case is longer than a protruding length by which the second battery attachment unit protrudes from the case.

10. The accommodation box further includes a case cover capable of closing the upper opening of the case. The case cover is attached to the case so as to be movable with respect to the case, and moves between a closed position for closing the upper opening of the case and an open position for opening the upper opening of the case. The accommodation box according to claim 8, wherein when the case cover is in the open position, the case cover is disposed in the first direction rather than the second battery attachment unit.

11. A case cover capable of closing the upper opening of the case; The accommodation box further includes a cushioning material made of an elastic material and attached to the case cover. When the case cover closes the upper opening of the case, the cushioning material is sandwiched between the battery pack attached to the first battery attachment unit and the case cover, and is also sandwiched between the battery pack attached to the second battery attachment unit and the case cover. The pushing depth at which the buffer material is pushed into the battery pack attached to the first battery mounting unit is substantially the same as the pushing depth at which the buffer material is pushed into the battery pack attached to the second battery mounting unit. The housing box according to any one of claims 8 to 10.

12. The case has a box shape with an upper opening that is open at the top, the upper opening of the case can be closed, and further includes a case cover that defines an accommodation space between it and the case when the upper opening of the case is closed, the plurality of battery mounting units are arranged in the accommodation space, the battery pack is located at the mounting position when attached to the battery mounting unit, The case cover maintains the battery pack at the mounting position with respect to the battery mounting unit when the upper opening of the case is closed. The housing box according to claim 1.

13. further includes a buffer material sandwiched between the battery pack and the case cover when the case cover is attached to the case and the case cover closes the upper opening of the case, The buffer material is made of an elastic material. The housing box according to claim 12.

14. a detection device that detects that the case cover closes the upper opening of the case, and a control unit, The control unit permits charging of the battery pack attached to the battery mounting unit when the detection device detects that the case cover closes the upper opening of the case. The housing box according to claim 12 or 13.

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