Electrical Equipment

Abstract

To provide a technology that makes it possible to improve safety of a user using an electrical apparatus.SOLUTION: An electrical apparatus comprises: a housing provided with a first attachment unit capable of attaching / removing a first target apparatus; a first electrical apparatus side terminal; a first terminal cover movable between a protective position and an exposed position; and a first lock member engaging with the first terminal cover at the protective position and movable between a lock position where movement of the first terminal cover from the protective position to the exposed position is limited and an unlock position. The first lock member is constructed so as to move from the lock position to the unlock position when the first target apparatus is slid in a slide direction and the first target apparatus is attached to the housing. In a state in which the first lock member is located at the lock position, the first lock member is disposed at a position where the same cannot be operated directly by a user from the lock position to the unlock position.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The technology disclosed in this specification relates to electrical equipment. [Background technology]

[0002] Patent document 1 discloses an electrical device comprising: a housing with an attachment portion to which a target device can be attached and detached by sliding the target device in a sliding direction; electrical device side terminals electrically connected to target device side terminals of the target device attached to the attachment portion; a terminal cover movable between a protected position which protects the electrical device side terminals and an exposed position which exposes the electrical device side terminals; and a locking member which engages with the terminal cover in the protected position and is movable between a locked position which restricts movement of the terminal cover from the protected position to the exposed position and an unlocked position which does not restrict movement of the terminal cover from the protected position to the exposed position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3497260 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electrical device of Patent Document 1, the locking member moves from the locked position to the unlocked position by placing the target device on the housing of the electrical device. The target device is then attached to the electrical device by moving the target device in the sliding direction. In this electrical device, when the locking member is in the locked position, the user can directly operate the locking member from the locked position to the unlocked position. Therefore, the locking member can be moved from the locked position to the unlocked position by the user, and then the terminal cover can be moved from the protected position to the exposed position. That is, when the target device is not attached to the electrical device, the electrical device side terminals may be exposed. When the target device is not attached to the electrical device, it is not desirable for the electrical device side terminals to be exposed.

[0005] This specification provides a technique that can improve the safety of users who use electrical devices. [Means for solving the problem]

[0006] The electrical device disclosed in this specification includes a housing having a first attachment portion to which a first target device can be attached and detached by sliding the first target device in a sliding direction, a first electrical device side terminal electrically connected to a first target device side terminal of the first target device attached to the first attachment portion, a first terminal cover movable between a protection position for protecting the first electrical device side terminal and an exposure position for exposing the first electrical device side terminal, and a first locking member engaged with the first terminal cover in the protection position and adapted to move the first terminal cover from the protection position to the exposure position. and a first locking member movable between a locked position that restricts movement of the first terminal cover from the protected position to the exposed position and an unlocked position that does not restrict movement of the first terminal cover from the protected position to the exposed position, wherein the first locking member is configured to move from the locked position to the unlocked position when the first target device is slid in the sliding direction to attach the first target device to the housing, and the first locking member may be positioned at a position where it cannot be directly operated from the locked position to the unlocked position by a user when the first locking member is positioned at the locked position.

[0007] According to the above configuration, when the first target device is not attached to the electrical device, it is possible to prevent the user from moving the locking member from the locked position to the unlocked position. Therefore, when the first target device is not attached to the electrical device, it is possible to reduce the possibility that the terminal cover is moved from the protected position to the exposed position and the first electrical device side terminal is exposed. Therefore, it is possible to improve the safety of the user who uses the electrical device. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a power cutter 10 according to an embodiment. [Diagram 2] FIG. 2 is a top view of the power cutter 10 of the embodiment. [Diagram 3]2 is a front view of a terminal housing 60 accommodated in a battery case 20 of the embodiment, as viewed from the front. FIG. [Figure 4] 1 is a perspective view of the terminal housing 60 according to the embodiment, showing a state in which a terminal cover 72 is in a protective position. [Diagram 5] 2 is a perspective view of the terminal housing 60 according to the embodiment, showing a state in which a terminal cover 72 is in an exposed position. FIG. [Figure 6] 1 is a perspective view of a terminal cover 72 according to an embodiment of the present invention, seen from the upper left. [Figure 7] 1 is a perspective view of a terminal cover 72 according to an embodiment of the present invention, seen from the upper right. [Figure 8] 1 is a cross-sectional view of the terminal housing 60 of the embodiment with a terminal cover 72 in a protective position. [Figure 9] 1 is a cross-sectional view of the terminal housing 60 of the embodiment in a state where a terminal cover 72 is in an exposed position. [Figure 10] FIG. 2 is a perspective view of a battery pack B1 according to the embodiment. [Figure 11] 1A to 1C are cross-sectional views showing the operation of a terminal cover 72 and a locking member 100 according to an embodiment of the present invention (1). [Figure 12] 10 is a cross-sectional view (2) showing the operation of the terminal cover 72 and the locking member 100 according to the embodiment. FIG. [Figure 13] 3 is a side view of the object 300. FIG. [Figure 14] FIG. 13 is a perspective view of a charger 400 and a battery pack B1 according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] 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 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 in conjunction with other features and inventions to provide further improved electrical devices.

[0010] 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.

[0011] 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.

[0012] In one or more embodiments, the present invention includes a housing having a first attachment portion to which a first target device can be attached and detached by sliding the first target device in a sliding direction; a first electric device side terminal electrically connected to a first target device side terminal of the first target device attached to the first attachment portion; a first terminal cover movable between a protection position for protecting the first electric device side terminal and an exposure position for exposing the first electric device side terminal; and a first locking member engaged with the first terminal cover in the protection position and adapted to lock the first terminal cover from the protection position to the exposure position. and a first locking member movable between a locked position that restricts movement of the first terminal cover from the protected position to the exposed position and an unlocked position that does not restrict movement of the first terminal cover from the protected position to the exposed position, wherein the first locking member is configured to move from the locked position to the unlocked position when the first target device is slid in the sliding direction to attach the first target device to the housing, and the first locking member may be positioned at a position where it cannot be directly operated from the locked position to the unlocked position by a user when the first locking member is positioned at the locked position.

[0013] In one or more embodiments, the electrical device may include two first locking members, and when at least one of the two first locking members is engaged with the first terminal cover, movement of the first terminal cover from the protecting position to the exposing position may be restricted.

[0014] According to the above configuration, even if one of the first locking members is moved from the locked position to the unlocked position, the movement of the first terminal cover from the protected position to the exposed position is restricted as long as the other first locking member is in the locked position. Therefore, even if a user's finger comes into contact with one of the first locking members and the locking member moves from the locked position to the unlocked position, the terminal cover can be prevented from moving from the protected position to the exposed position. Therefore, the safety of the user who uses the electrical device can be further improved.

[0015] In one or more embodiments, the housing may include a pair of grooves extending along the sliding direction. The two first locking members may be provided in the pair of grooves, respectively. A size in a width direction of the pair of grooves may be smaller than a size of a user's finger.

[0016] According to the above configuration, it is possible to reduce the possibility that the two first locking members are operated simultaneously, thereby further improving the safety of the user of the electrical device.

[0017] In one or more embodiments, the housing may include a groove extending along the sliding direction. The first locking member may be disposed in the groove. The first locking member may be moved from the locked position to the unlocked position by a slide rail of the first target device inserted into the groove.

[0018] In a configuration in which the locking member is not moved from the locked position to the unlocked position by the slide rail of the first target device, a member other than the locking member must be provided. Specifically, a member must be provided that moves the locking member from the locked position to the unlocked position in response to contact with the slide rail of the first target device. With the above configuration, it is not necessary to provide a member other than the locking member. Therefore, the number of parts of the electrical device can be reduced.

[0019] In one or more embodiments, the electrical device may further include a biasing member that biases the terminal cover from the exposed position to the protected position. The terminal cover may further include a moving portion that contacts the locking member and moves the locking member from the unlocked position to the locked position when the terminal cover is biased from the exposed position to the protected position by the biasing member.

[0020] According to the above configuration, when the first target device is removed from the electric device, the biasing member biases the terminal cover from the exposed position to the protected position. Then, the terminal cover moves the locking member from the unlocked position to the locked position. Therefore, the user does not need to move the locking member from the unlocked position to the locked position. This improves user convenience.

[0021] In one or more embodiments, the first target device may be a first battery pack. The housing may further include a second attachment portion to which the second battery pack can be attached and detached by sliding the second battery pack in a sliding direction. The electric device may be a working machine that operates by power supplied from the first battery pack and the second battery pack. The working machine may further include a second electric device side terminal electrically connected to a second target device side terminal of the second battery pack attached to the second attachment portion, a second terminal cover that is movable between a protection position that protects the second electric device side terminal and an exposure position that exposes the second electric device side terminal, and a second locking member that is engaged with the second terminal cover in the protection position and is movable between a locking position that restricts movement of the second terminal cover from the protection position to the exposure position and an unlocking position that does not restrict movement of the second terminal cover from the protection position to the exposure position. The second locking member may be configured to move from the locked position to the unlocked position when the second battery pack is slid in the sliding direction and the second battery pack is attached to the housing. The second locking member may be disposed at a position where it cannot be directly operated from the locked position to the unlocked position by an object when the second locking member is at the locked position.

[0022] In the above electric device, when the first battery pack is attached to the first mounting portion of the electric device and the second battery pack is not attached to the electric device, it is highly likely that power is being supplied from the first battery pack to the electric device. In such a state, it is undesirable for the second electric device side terminal to be exposed. According to the above configuration, when the first battery pack is attached to the first mounting portion of the electric device and the second battery pack is not attached to the electric device, it is possible to prevent the second electric device side terminal from being exposed. Therefore, it is possible to improve the safety of the user who uses the electric device.

[0023] (Example) A power cutter 10 will be described with reference to Figs. 1 to 9. The power cutter 10 is a handheld power tool and is mainly used to cut objects such as stone and iron. As shown in Figs. 1 and 2, the power cutter 10 includes a disk blade 12, an outer housing 14, a metal blade arm 16, a blade cover 18, and a battery case 20. The blade arm 16 extends forward from the right part of the outer housing 14. The disk blade 12 is a disk-shaped blade and has a plurality of cutting edges or grinding wheels on its outer periphery. The blade cover 18 is attached to the blade arm 16 and covers a part of the disk blade 12. The blade cover 18 prevents dust generated by the disk blade 12 from scattering toward the user.

[0024] The power cutter 10 further includes a front grip 30 and a rear grip 32. The front grip 30 is provided at the front portion of the outer housing 14. The rear grip 32 is provided at the rear portion of the outer housing 14 and extends rearward from the outer housing 14.

[0025] The battery case 20 is provided between the front grip 30 and the rear grip 32. The battery case 20 has an openable and closable battery cover 40. As shown in Fig. 2, the battery case 20 accommodates a terminal housing 60 and two battery packs B1, B2.

[0026] 1, a main switch 50 is provided on the rear grip 32. When a user operates the main switch 50, a motor (not shown) housed in the outer housing 14 drives the disc blade 12. When the user releases the operation of the main switch 50, the motor stops driving the disc blade 12. An illumination switch 52 for turning an illumination device 51 on and off is provided on the upper surface of the rear grip 32.

[0027] The power cutter 10 further includes an overload indicator 54 and a battery indicator 56. The overload indicator 54 is an indicator that notifies the user of an overload applied to the disk blade 12. The battery indicator 56 is an indicator that notifies the user of the charge level of each of the two battery packs B1, B2.

[0028] As shown in FIG. 4 and FIG. 5, the battery interface 62 is provided on the left side of the terminal housing 60. A battery interface having a structure similar to that of the battery interface 62 is also provided on the right side of the terminal housing 60. As shown in FIG. 5, the battery interface 62 includes an opening 64, a slide portion 66, an equipment side terminal 70, and a terminal cover 72. The opening 64 is an opening for exposing the equipment side terminal 70, and is formed between the slide portions 66 at both the front and rear ends. The slide portion 66 is formed with a slide groove 68 extending in the up-down direction. The width L1 of the slide groove 68 in the groove direction (left-right direction in this embodiment) is designed to be large enough that an object 300 (see FIG. 13) simulating a user's finger cannot pass through. For example, the width L1 of the slide groove 68 in the left-right direction is 7.55 [mm], and the size L2 (see FIG. 13) of the tip 300a of the object 300 is 7.9 [mm]. A lock cover 74 is attached to the front of the terminal housing 60. A lock cover 74 is also attached to the rear side of the terminal housing 60 .

[0029] The terminal cover 72 is configured to be slidable in the up-down direction with respect to the terminal housing 60. As shown in Figs. 6 and 7, the terminal cover 72 includes a main body 80 and a rail portion 82. The main body 80 and the rail portion 82 are integrally formed. The main body 80 is provided with a terminal groove 86 extending downward from the upper end of the main body 80. The terminal groove 86 is a groove for passing the device-side terminal 70. The shape of the front rail portion 82 is plane-symmetrical with the rear rail portion 82 across a plane including the left-right and upward directions. In the following, the front rail portion 82 will be described, and the description of the rear rail portion 82 will be omitted. The front rail portion 82 includes a first extension portion 88, a second extension portion 90, and a third extension portion 92 extending forward from the front wall 80a of the main body 80. The second extension portion 90 extends rightward from the upper end of the first extension portion 88. As shown in Fig. 8, the lower surface of the second extension portion 90 has an inclined portion 90a that inclines upward from the front to the rear. As shown in Figs. 6 and 7, the third extension portion 92 extends rightward from the first extension portion 88 at a position lower than the second extension portion 90. A first receiving portion 94 is defined between the second extension portion 90 and the third extension portion 92, and a second receiving portion 96 is defined below the third extension portion 92. Hereinafter, the position where the terminal cover 72 protects the device-side terminals 70 (Fig. 4) and the position where the terminal cover 72 does not protect the device-side terminals 70 (Fig. 5) are referred to as the "protecting position" and the "exposed position", respectively.

[0030] As shown in Figs. 8 and 9, the battery interface 62 further includes two locking members 100. Figs. 8 and 9 are cross-sectional views of the battery interface 62 on the left side of the terminal housing 60, as viewed from the left. Fig. 8 is a cross-sectional view of the terminal housing 60 (see Fig. 4) when the terminal cover 72 is in the protection position, and Fig. 9 is a cross-sectional view of the terminal housing 60 (see Fig. 5) when the terminal cover 72 is in the protection position. Note that, in Figs. 8 and 9, the device-side terminals 70 are omitted for ease of understanding. The shape of the front locking member 100 is plane-symmetrical to the shape of the rear locking member 100 across a plane including the left-right and up-down directions. In the following, the front locking member 100 in the state of Fig. 8 will be described, and the description of the rear locking member 100 will be omitted. The locking member 100 is disposed between the terminal housing 60 and the locking cover 74. The locking member 100 includes a base 110, an engaging portion 112, a hook portion 114, and a shaft portion 116. The base 110 extends in the up-down direction. The engaging portion 112 and the hook portion 114 extend rearward from the base 110. The engaging portion 112 is provided at the lower portion of the base 110. The hook portion 114 is provided above the engaging portion 112. An inclined portion 112a provided on the upper surface of the engaging portion 112 is substantially parallel to an inclined portion 90a of the second extension portion 90 of the terminal cover 72. The upper surface of the hook portion 114 has an inclined portion 114a that is inclined downward from the front to the rear. As shown in FIG. 8, when the terminal cover 72 is in the protection position, the engaging portion 112 is received in the first receiving portion 94 of the terminal cover 72. The shaft portion 116 extends leftward from the upper portion of the base 110. 4 and 5, the shaft portion 116 is sandwiched between the terminal housing 60 and the lock cover 74. As shown in Figures 8 and 9, the locking member 100 rotates about a rotation axis A of the shaft portion 116 that extends in the left-right direction.

[0031] As shown in Fig. 8, an inner protrusion 60a is provided at the front lower part of the terminal housing 60. A biasing member 120 is provided between the inner protrusion 60a and the third extension portion 92 of the terminal cover 72. The terminal cover 72 is normally biased to the protection position (see Figs. 4 and 8) by the biasing member 120.

[0032] In this embodiment, when the terminal cover 72 is located at the protection position and the engagement portion 112 of the locking member 100 is received in the first receiving portion 94 of the terminal cover 72, the terminal cover 72 cannot be moved from the protection position to the exposure position. For example, in the state of FIG. 8, when a user tries to move the terminal cover 72 downward, the inclined portion 90a of the second extension portion 90 of the terminal cover 72 first comes into contact with the inclined portion 112a of the engagement portion 112 of the locking member 100, and a force acts in a direction to rotate the locking member 100 rearward about the rotation axis A. Since the inclined portion 112a of the locking member 100 comes into contact with the inclined portion 90a of the terminal cover 72, the rearward rotation of the locking member 100 about the rotation axis A is restricted. Therefore, the downward movement of the terminal cover 72 is restricted. That is, since the engagement portion 112 of the locking member 100 is engaged with the terminal cover 72, the downward movement of the terminal cover 72 is restricted. Hereinafter, the position of the locking member 100 when the engaging portion 112 of the locking member 100 is received in the first receiving portion 94 of the terminal cover 72 (FIG. 8) and the position of the locking member 100 when the engaging portion 112 is disposed outside the first receiving portion 94 (FIG. 9) will be referred to as the "locked position" and the "unlocked position", respectively. Note that a lever spring (not shown) is connected to the locking member 100, which biases the locking member 100 from the unlocked position to the locked position.

[0033] Next, the battery pack B1 will be described with reference to FIG. 10. In FIG. 10, the front-rear direction, the left-right direction, and the up-down direction are defined based on the state in which the battery pack B1 is attached to the battery interface 62 on the left side of the terminal housing 60 (see FIG. 3). The rated voltage of the battery pack B1 is 36 [V], which is a relatively high voltage. As shown in FIG. 10, the battery pack B1 includes a battery housing 200 that houses a battery module (not shown). The battery housing 200 is formed into a substantially rectangular parallelepiped shape as a whole. The battery housing 200 includes a terminal portion 202, a hook 204, and a pair of slide rails 206. The terminal portion 202 includes a battery side terminal (not shown) that is electrically connected to the device side terminal 70 of the power cutter 10 when the battery pack B1 is attached to the power cutter 10.

[0034] The hook 204 includes an operating portion 204a and a protruding portion 204b. The hook 204 is held by the battery housing 200 so as to be movable in the left-right direction. The hook 204 is biased rightward by a compression spring (not shown), and moves leftward when the operating portion 204a or the protruding portion 204b is pressed leftward. When the battery pack B1 is attached to the power cutter 10, the protruding portion 204b engages with the terminal housing 60 of the power cutter 10 to fix the battery pack B1 to the power cutter 10. The user can remove the battery pack B1 from the power cutter 10 by pushing the operating portion 204a leftward and sliding the battery pack B1 upward.

[0035] The slide rails 206 extend along the sliding direction (the up-down direction in this embodiment) and are disposed at both the front and rear ends of the battery housing 200. The slide rails 206 slidably engage with the slide grooves 68 of the power cutter 10 when the battery pack B1 is attached to or detached from the power cutter 10. The structure of the battery pack B2 is similar to that of the battery pack B1.

[0036] Next, a procedure for attaching the battery pack B1 to the battery interface 62 on the left side of the terminal housing 60 of the power cutter 10 will be described with reference to Figures 8, 11, and 12. Note that the device side terminals 70 are omitted in Figures 11 and 12 for ease of understanding.

[0037] In order to mount the battery pack B1 on the power cutter 10 of FIG. 8, the user inserts the slide rail 206 (see FIG. 10) of the battery pack B1 into the slide groove 68 of the terminal housing 60, and moves the battery pack B1 downward relative to the power cutter 10. In this case, the lower end of the slide rail 206 of the battery pack B1 comes into contact with the inclined portion 114a of the hook portion 114 of the locking member 100. Then, as shown in FIG. 11, when the user moves the battery pack B1 further downward, the locking member 100 is rotated. Specifically, the front locking member 100 is rotated forward about the rotation axis A. Also, the rear locking member 100 is rotated rearward about the rotation axis A. As a result, the engaging portion 112 of the locking member 100 moves to the outside of the first receiving portion 94 of the terminal cover 72, that is, to the unlocked position. As a result, the locking member 100 and the terminal cover 72 are disengaged from each other. Furthermore, the lower end of the terminal portion 202 of the battery pack B 1 comes into contact with the upper wall of the main body 80 of the terminal cover 72 .

[0038] As shown in Fig. 12, when the user moves the battery pack B1 further downward, the terminal cover 72 is pushed downward by the battery pack B1. That is, the terminal cover 72 is moved from the protection position to the exposure position. Then, the device side terminal 70 (see Fig. 5) of the power cutter 10 and the battery side terminal of the battery pack B1 are electrically connected, and the battery pack B1 is fixed to the power cutter 10.

[0039] Next, referring to Figs. 8 and 12, a procedure for removing the battery pack B1 attached to the battery interface 62 on the left side of the terminal housing 60 of the power cutter 10 will be described. When removing the battery pack B1 from the power cutter 10 of Fig. 12, the user presses the operating portion 204a (see Fig. 10) of the battery pack B1. Then, the battery pack B1 is moved upward relative to the power cutter 10. This removes the battery pack B1 from the power cutter 10. At this point, the locking member 100 is located at the unlocked position, and the terminal cover 72 is located at the exposed position. When the battery pack B1 is removed from the power cutter 10, the terminal cover 72 is urged from the exposed position to the protected position by the urging force of the urging member 120, and the locking member 100 is rotated by the lever spring connected to the locking member 100. Specifically, the front locking member 100 is rotated rearward around the rotation axis A. Also, the rear locking member 100 is rotated forward around the rotation axis A. Then, when the terminal cover 72 is biased from the exposed position to the protected position, the upper surface of the second extension portion 90 of the terminal cover 72 comes into contact with the lower surface of the engagement portion 112 of the locking member 100, and the locking member 100 is rotated. Specifically, the front locking member 100 is rotated forward around the rotation axis A. Also, the rear locking member 100 is rotated rearward around the rotation axis A. Thereafter, when the second extension portion 90 is moved upward beyond the engagement portion 112, the locking member 100 is rotated by the lever spring connected to the locking member 100. Specifically, the front locking member 100 is rotated rearward around the rotation axis A. Furthermore, the rear locking member 100 is rotated forward around the rotation axis A. As a result, the terminal cover 72 is moved from the exposed position to the protected position, and the lock member 100 is moved from the unlocked position to the locked position. The battery pack B2 can be attached to and detached from the battery interface on the right side of the terminal housing 60 of the power cutter 10 in the same manner as the battery pack B1.

[0040] As described above, the power cutter 10 according to one embodiment includes the terminal housing 60 (an example of a "housing"), the device side terminals 70 (an example of a "first electric device side terminal"), the terminal cover 72, and the locking member 100 (an example of a "first locking member"), as shown in Figs. 3 to 13. The locking member 100 is configured to move from the locked position to the unlocked position when the battery pack B1 is slid in the sliding direction and the battery pack B1 is attached to the terminal housing 60. When the locking member 100 is in the locked position, the locking member 100 is disposed in a position where the user cannot directly operate the locking member 100 from the locked position to the unlocked position. According to the above configuration, when the battery pack B1 is not attached to the power cutter 10, the locking member 100 can be prevented from being moved from the locked position to the unlocked position by the user. Therefore, when the battery pack B1 is not attached to the power cutter 10, the terminal cover 72 can be moved from the protected position to the exposed position, reducing the possibility that the device side terminals 70 are exposed. Therefore, the safety of the user who uses the power cutter 10 can be improved.

[0041] As shown in Figs. 8 and 9, the power cutter 10 according to an embodiment may include two locking members 100. When at least one of the two locking members 100 is engaged with the terminal cover 72, the movement of the terminal cover 72 from the protection position to the exposure position is restricted. According to the above configuration, even if the front locking member 100 is moved from the lock position to the unlock position, the movement of the terminal cover 72 from the protection position to the exposure position is restricted as long as the rear locking member 100 is located at the lock position. Therefore, even if a user having small fingers comes into contact with the front locking member 100 and the front locking member 100 moves from the lock position to the unlock position, the movement of the terminal cover 72 from the protection position to the exposure position can be suppressed. Therefore, the safety of the user who uses the power cutter 10 can be further improved.

[0042] As shown in Figs. 8 and 9, the terminal housing 60 of the power cutter 10 according to one embodiment includes a pair of slide grooves 68 (an example of a "pair of recessed grooves") extending along the slide direction. Two locking members 100 are provided in each of the pair of slide grooves 68. The width L1 of the pair of slide grooves 68 in the groove direction is smaller than the size L2 of the tip 300a of the object 300 simulating the user's finger. With the above configuration, it is possible to reduce the possibility that the two locking members 100 are operated simultaneously. Therefore, it is possible to further increase the safety of the user who uses the power cutter 10.

[0043] As shown in Figs. 8 and 9, the terminal housing 60 of the power cutter 10 according to an embodiment includes a slide groove 68 (an example of a "recessed groove") extending along the slide direction. The locking member 100 is disposed in the slide groove 68. The locking member 100 is moved from the locked position to the unlocked position by the slide rail 206 of the battery pack B1 inserted into the slide groove 68. The width L1 of the slide groove 68 in the groove direction is smaller than the size L2 of the tip 300a of the object 300 simulating the user's finger. In the case where the locking member 100 is not moved from the locked position to the unlocked position by the slide rail 206 of the battery pack B1, it is necessary to provide a member other than the locking member 100. Specifically, it is necessary to provide a member that moves the locking member 100 from the locked position to the unlocked position in response to contact with the slide rail 206 of the battery pack B1. According to the above configuration, it is not necessary to provide a member other than the locking member 100. Therefore, the number of parts of the power cutter 10 can be reduced.

[0044] The power cutter 10 according to one embodiment includes a left battery interface 62 to which the battery pack B1 can be attached and detached, and a right battery interface to which the battery pack B2 can be attached and detached. In the power cutter 10, for example, when the battery pack B1 is attached to the battery interface 62 on the left side of the terminal housing 60 of the power cutter 10 and the battery pack B2 is not attached to the power cutter 10, it is highly likely that power is being supplied from the battery pack B1 to the power cutter 10. In such a state, it is undesirable that the device side terminal on the right side of the terminal housing 60 of the power cutter 10 is exposed. According to the above configuration, when the battery pack B1 is attached to the power cutter 10 and the battery pack B2 is not attached to the power cutter 10, it is possible to prevent the device side terminal on the right side from being exposed. Therefore, the safety of the user who uses the power cutter 10 can be improved.

[0045] Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples exemplified above.

[0046] (First Modification) The "electrical device" is not limited to the power cutter 10, and may be a device that operates with power supplied from a battery pack, such as a brush cutter, a chain saw dust collector, a circular saw, or a transport vehicle. The charger 400 in FIG. 14 may be the "electrical device". Specifically, the charger 400 may have a configuration corresponding to the terminal cover 72, the locking member 100, and the biasing member 120 of the power cutter 10 of the embodiment. In another modification, the battery pack may have a configuration corresponding to the terminal cover 72, the locking member 100, and the biasing member 120 of the power cutter 10 of the embodiment. That is, the battery pack may be an example of the "electrical device".

[0047] (Second Modification) The power cutter 10 may include one locking member 100, or may include three or more locking members 100.

[0048] (Third Modification) When the engagement with one of the two locking members 100 is released, the restriction on the movement of the terminal cover 72 from the protecting position to the exposing position may be released.

[0049] (Fourth Modification) The power cutter 10 does not necessarily have to include the biasing member 120. In this modification, the locking member 100 may be configured so that the user can move it from the unlocked position to the locked position.

[0050] (Fifth Modification) The locking member 100 may not be connected to a lever spring (not shown) that biases the locking member 100 from the unlocked position to the locked position. In this modification, the terminal cover 72 may have a moving portion that contacts the lower surface of the hook portion 114 of the locking member 100 when the terminal cover 72 moves from the exposed position (see FIG. 9) to the protected position (see FIG. 8). In addition, in this modification, the shaft portion 116 may be provided near the center of the base portion 110 in the vertical direction. That is, the rotation axis A may be provided near the center of the base portion 110 in the vertical direction. According to this configuration, when the battery pack B1 is removed from the power cutter 10, the biasing member 120 biases the terminal cover 72 from the exposed position to the protected position. Then, when the terminal cover 72 moves from the exposed position to the protected position, the moving portion of the terminal cover 72 moves the locking member 100 from the unlocked position to the locked position. Therefore, the user does not need to move the lock member 100 from the unlocked position to the locked position, thereby improving user convenience.

[0051] (Reference Example) For example, when the power cutter 10 has two locking members 100 and the two locking members 100 are arranged in positions where they cannot be operated simultaneously, the two locking members 100 may be arranged in positions where they can be operated from the locked position to the unlocked position by the object 300. For example, it is sufficient that the two locking members 100 are arranged in positions where they cannot be operated simultaneously with one hand of the user.

[0052] The technical elements described in this specification or drawings have technical utility either alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technologies illustrated in this specification or drawings can achieve multiple objectives simultaneously, and achieving one of these objectives is itself technically useful. [Explanation of symbols]

[0053] 10: power cutter, 12: disc blade, 14: outer housing, 16: blade arm, 18: blade cover, 20: battery case, 30: front grip, 32: rear grip, 40: battery cover, 50: main switch, 51: illuminator, 52: light switch, 54: overload indicator, 56: battery indicator, 60: terminal housing, 60a: inner protrusion, 62: battery interface, 64: opening, 66: slide portion, 68: slide groove, 70: device side terminal, 72: terminal cover, 74: lock Cover, 80: main body, 80a: front wall, 82: rail portion, 86: terminal groove, 88: first extension portion, 90: second extension portion, 90a: inclined portion, 92: third extension portion, 94: first receiving portion, 96: second receiving portion, 100: locking member, 110: base portion, 112: engagement portion, 112a: inclined portion, 114: hook portion, 114a: inclined portion, 116: shaft portion, 120: biasing member, 200: battery housing, 202: terminal portion, 204: hook, 204a: operating portion, 204b: protruding portion, 206: slide rail, 300: object, 300a: tip, 400: charger

Claims

1. An electrical device comprising: a housing including a first attachment portion to which a first target device can be attached and detached by sliding the first target device in a slide direction; a first electric device side terminal electrically connected to a first target device side terminal of the first target device attached to the first attachment portion; a first terminal cover that is movable between a protection position that protects the first electric device side terminals and an exposure position that exposes the first electric device side terminals; a first locking member that is movable between a locked position that engages with the first terminal cover in the protecting position and restricts movement of the first terminal cover from the protecting position to the exposed position and an unlocked position that does not restrict movement of the first terminal cover from the protecting position to the exposed position; Equipped with the first locking member is configured to move from the lock position to the unlock position when the first target device is slid in the sliding direction and the first target device is attached to the housing; The housing includes a groove extending along the sliding direction, The width of the groove is less than 7.9 mm; The first locking member is disposed in the groove, the first locking member is moved from the lock position to the unlock position by a slide rail of the first target device inserted into the groove; the first locking member is disposed in the groove and the dimension of the groove in the width direction is less than 7.9 mm, thereby making it impossible for a user to directly operate the first locking member from the locked position to the unlocked position when the first locking member is positioned at the locked position.

2. The electrical device includes two of the first locking members, 2. The electrical device according to claim 1, wherein when at least one of the two first locking members is engaged with the first terminal cover, movement of the first terminal cover from the protecting position to the exposing position is restricted.

3. The housing includes a pair of the recessed grooves, The electrical device according to claim 2 , wherein the two first locking members are provided in the pair of recessed grooves, respectively.

4. The electrical device further includes a biasing member that biases the first terminal cover from the exposed position to the protected position, 4. The electrical device according to claim 1, wherein the first terminal cover further includes a moving portion that contacts the first locking member and moves the first locking member from the unlocked position to the locked position when the first terminal cover is urged from the exposed position to the protected position by the urging member.

5. the first target device is a first battery pack; the housing further includes a second mounting portion to which the second battery pack can be attached and detached by sliding the second battery pack in the sliding direction; the electrical device is a working machine operated by power supplied from the first battery pack and the second battery pack, The working machine further includes: a second electric device side terminal electrically connected to a second target device side terminal of the second battery pack attached to the second attachment portion; a second terminal cover movable between a protection position for protecting the second electric device side terminals and an exposure position for exposing the second electric device side terminals; a second locking member that is movable between a locked position that engages with the second terminal cover in the protecting position and restricts movement of the second terminal cover from the protecting position to the exposed position and an unlocked position that does not restrict movement of the second terminal cover from the protecting position to the exposed position; the second locking member is configured to move from the locked position to the unlocked position when the second battery pack is slid in the sliding direction and the second battery pack is attached to the housing; The housing further includes a second groove extending along the sliding direction, The size of the second groove in the width direction is less than 7.9 mm, the second locking member is disposed in the second groove, the second locking member is moved from the locked position to the unlocked position by a slide rail of the second battery pack inserted into the second recessed groove; 5. The electrical device according to claim 1, wherein the second locking member is disposed in the second groove and the size of the second groove in the width direction is less than 7.9 mm, so that when the second locking member is in the locked position, it cannot be directly operated by a user from the locked position to the unlocked position.

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