Electronic apparatus and case

Abstract

To provide a technique capable of enhancing the convenience of a user.SOLUTION: An electronic apparatus comprises: a first tray unit; a second tray unit; and a main body case having a tray unit attachment part that can selectively attach any one of the first tray unit and the second tray unit. The first tray unit comprises a plurality of first battery attachment parts. The second tray unit comprises a plurality of second battery attachment parts. The arrangement of the plurality of second battery attachment parts is different from the arrangement of the plurality of first battery attachment parts, or the number of the plurality of second battery attachment parts is different from the number of the plurality of first battery attachment parts, or an attachment structure of the second battery attachment part to which the second battery is attached is different from the attachment structure of the first battery attachment part to which the first battery is attached.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses an electrical device. The electrical device includes a first tray unit and a case having a tray unit mounting portion to which the first tray unit can be attached. The first tray unit includes a plurality of first battery mounting portions. A first battery can be attached to each of the plurality of first battery mounting portions.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above technology, for a battery that cannot be attached to the first battery mounting portion, it is necessary to prepare another electrical device to which the battery can be attached. Therefore, it is desired to improve the convenience for the user. This specification provides a technology that can improve the convenience for the user.

Means for Solving the Problems

[0005] This specification discloses an electrical device. The electrical device includes a first tray unit, a second tray unit, and a main body case having a tray unit mounting portion to which either the first tray unit or the second tray unit can be selectively attached. The first tray unit includes a plurality of first battery mounting portions to which first batteries can be attached respectively, a first battery terminal electrically connected to the first battery when the first battery is attached to the first battery mounting portion, and a first case mounting portion attached to the tray unit mounting portion. The second tray unit includes a plurality of second battery mounting portions to which second batteries can be attached respectively, a second battery terminal electrically connected to the second battery when the second battery is attached to the second battery mounting portion, and a second case mounting portion attached to the tray unit mounting portion. The arrangement of the plurality of second battery mounting portions is different from the arrangement of the plurality of first battery mounting portions, or the number of the plurality of second battery mounting portions is different from the number of the plurality of first battery mounting portions, or the mounting structure of the second battery mounting portion for attaching the second battery is different from the mounting structure of the first battery mounting portion for attaching the first battery.

[0006] According to the above configuration, the first battery is attached to the first battery mounting portion of the first tray unit. Also, the second battery is attached to the second battery mounting portion of the second tray unit. Therefore, by exchanging the first tray unit and the second tray unit, both the first battery and the second battery can be used with one electrical device. This can improve the convenience for the user.

[0007] In addition, this specification discloses a case. The case includes a first tray unit, a second tray unit, and a case including a tray unit attachment portion to which either the first tray unit or the second tray unit can be selectively attached. The first tray unit includes a plurality of first battery attachment portions, to each of which a first battery can be attached, and a first case attachment portion attached to the tray unit attachment portion. The second tray unit includes a plurality of second battery attachment portions, to each of which a second battery can be attached, and a second case attachment portion attached to the tray unit attachment portion. The case can accommodate the first battery and the second battery. The arrangement of the plurality of second battery attachment portions is different from the arrangement of the plurality of first battery attachment portions, or the number of the plurality of second battery attachment portions is different from the number of the plurality of first battery attachment portions, or the attachment structure of the second battery attachment portion for attaching the second battery is different from the attachment structure of the first battery attachment portion for attaching the first battery.

[0008] According to the above configuration, the first battery is attached to the first battery attachment portion of the first tray unit. Also, the second battery is attached to the second battery attachment portion of the second tray unit. Therefore, by exchanging the first tray unit and the second tray unit, both the first battery and the second battery can be used in one case. Thereby, the convenience for the user can be improved.

Brief Description of the Drawings

[0009]

Figure 1

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Modes for Carrying Out the Invention

[0010] Exemplary and non-limiting specific examples of the present invention will be described in detail below with reference to the drawings. This detailed description is merely intended to show those skilled in the art the details for implementing preferred examples of the present invention, and is not intended to limit the scope of the present invention. Also, the additional features and inventions disclosed can be used separately or together with other features and inventions to provide further improved electrical devices and cases, and methods for manufacturing and using them.

[0011] Also, the combinations of features and steps disclosed in the following detailed description are not essential for practicing the present invention in the broadest sense, and are described only for the purpose of illustrating representative specific examples of the present invention in particular. Further, the various features of the following representative specific examples, as well as the various features recited in the claims, need not be combined as described in the specific examples herein or in the order recited.

[0012] All features described in this specification and / or in the claims are intended to be disclosed individually and independently of each other, as limitations to the specific matters disclosed in the original disclosure and in the claims, apart from the configurations of the features described in the examples and / or in the claims. Further, all descriptions of numerical ranges and groups or populations are made with the intention of disclosing intermediate configurations as limitations to the specific matters disclosed in the original disclosure and in the claims.

[0013] This specification discloses an electrical device. The electrical device includes a first tray unit, a second tray unit, and a main body case having a tray unit mounting portion to which either the first tray unit or the second tray unit can be selectively attached. The first tray unit includes a plurality of first battery mounting portions to which first batteries can be respectively attached, a first battery terminal electrically connected to the first battery when the first battery is attached to the first battery mounting portion, and a first case mounting portion attached to the tray unit mounting portion. The second tray unit includes a plurality of second battery mounting portions to which second batteries can be respectively attached, a second battery terminal electrically connected to the second battery when the second battery is attached to the second battery mounting portion, and a second case mounting portion attached to the tray unit mounting portion. The arrangement of the plurality of second battery mounting portions is different from the arrangement of the plurality of first battery mounting portions, or the number of the plurality of second battery mounting portions is different from the number of the plurality of first battery mounting portions, or the mounting structure of the second battery mounting portion for attaching the second battery is different from the mounting structure of the first battery mounting portion for attaching the first battery.

[0014] In one or more embodiments, the mounting structure of the first case mounting portion for attaching the tray unit mounting portion may be the same as the mounting structure of the second case mounting portion for attaching the tray unit mounting portion.

[0015] According to the above configuration, it is possible to suppress the complexity of the structure of the tray unit mounting portion as compared with a configuration in which the mounting structure of the first case mounting portion for attaching the tray unit mounting portion is different from the mounting structure of the second case mounting portion for attaching the tray unit mounting portion.

[0016] In one or more embodiments, the mounting structure of the first battery mounting portion for mounting the first battery may be the same as the mounting structure of the second battery mounting portion for mounting the second battery.

[0017] According to the above configuration, the first battery can be mounted on the second battery mounting portion, and the second battery can be mounted on the first battery mounting portion. Thereby, the convenience for the user can be improved.

[0018] In one or more embodiments, the electrical device may further include a control board mounted on the first tray unit.

[0019] According to the above configuration, after mounting the control board on the first tray unit, the first tray unit can be mounted on the main body case. Thereby, the assemblability of the electrical device can be improved.

[0020] In one or more embodiments, the control board may be attachable to the second tray unit.

[0021] According to the above configuration, a dedicated control board is not required for the second tray unit. Thereby, the number of parts of the electrical device can be reduced.

[0022] In one or more embodiments, the first tray unit may be mounted on the tray unit mounting portion via a fastener. The fastener may be mounted on the first tray unit from the outside of the main body case.

[0023] According to the above configuration, by inserting the fastener into the main body case from the outside of the main body case, the first tray unit is mounted on the tray unit mounting portion. Thereby, the assemblability of the electrical device can be improved.

[0024] In one or more embodiments, the main body case may have an accommodation space for accommodating the first tray unit and the second tray unit.

[0025] According to the above configuration, since the first tray unit and the second tray unit are protected by the main body case, it is possible to prevent the first tray unit and the second tray unit from being damaged.

[0026] In one or more embodiments, the first tray unit may include at least one first battery mounting unit. The first battery mounting unit may include two or more of the first battery mounting portions. The second tray unit may include at least one second battery mounting unit. The second battery mounting unit may include two or more of the second battery mounting portions. The number of the two or more second battery mounting portions may be the same as the number of the two or more first battery mounting portions. The number of the at least one second battery mounting unit may be different from the number of the at least one first battery mounting unit.

[0027] According to the above configuration, the first tray unit and the second tray unit can be used separately according to the number of batteries used.

[0028] In one or more embodiments, the at least one first battery mounting unit may include a plurality of the first battery mounting units arranged in a row. The at least one second battery mounting unit may include a plurality of the second battery mounting units arranged in a row. In two adjacent first battery mounting units, the two or more first battery mounting portions in each of the two first battery mounting units may face the same direction. In two adjacent second battery mounting units, the direction in which the two or more second battery mounting portions of one of the two second battery mounting units face may be different from the direction in which the two or more second battery mounting portions of the other of the two second battery mounting units face.

[0029] According to the above configuration, the first tray unit and the second tray unit can be selectively used according to the number and size of the batteries to be used.

[0030] In one or more embodiments, the first tray unit may include a first display unit that displays the state of the first battery.

[0031] According to the above configuration, the state of the first battery can be easily grasped.

[0032] In one or more embodiments, the plurality of first battery mounting portions may be arranged in a first direction. With respect to the first direction, the center of the first display unit in the first direction may be arranged between two adjacent first battery mounting portions in the first direction.

[0033] According to the above configuration, the first display unit can be easily aligned with the two first battery mounting portions.

[0034] In addition, this specification discloses a case. The case includes a first tray unit, a second tray unit, and a main body case having a tray unit attachment portion to which either the first tray unit or the second tray unit can be selectively attached. The first tray unit includes a plurality of first battery attachment portions to which first batteries can be attached respectively, and a first case attachment portion attached to the tray unit attachment portion. The second tray unit includes a plurality of second battery attachment portions to which second batteries can be attached respectively, and a second case attachment portion attached to the tray unit attachment portion. The main body case can accommodate the first battery and the second battery. The arrangement of the plurality of second battery attachment portions is different from the arrangement of the plurality of first battery attachment portions, or the number of the plurality of second battery attachment portions is different from the number of the plurality of first battery attachment portions, or the attachment structure of the second battery attachment portion for attaching the second battery is different from the attachment structure of the first battery attachment portion for attaching the first battery.

[0035] In one or more embodiments, the attachment structure of the first case attachment portion for attaching the tray unit attachment portion may be the same as the attachment structure of the second case attachment portion for attaching the tray unit attachment portion.

[0036] According to the above configuration, compared with a configuration in which the attachment structure of the first case attachment portion for attaching the tray unit attachment portion is different from the attachment structure of the second case attachment portion for attaching the tray unit attachment portion, it is possible to suppress the complexity of the structure of the tray unit attachment portion.

[0037] In one or more embodiments, the attachment structure of the first battery attachment portion for attaching the first battery may be the same as the attachment structure of the second battery attachment portion for attaching the second battery.

[0038] According to the above configuration, the first battery can be attached to the second battery attachment portion, and the second battery can be attached to the first battery attachment portion. Thereby, the convenience for the user can be enhanced.

[0039] In one or more embodiments, the case may be capable of accommodating tools.

[0040] According to the above configuration, since the first battery, the second battery, and the tool are accommodated in the case, the convenience for the user can be further enhanced.

[0041] (First Embodiment) As shown in FIGS. 1 and 2, the electric device 2 is a charging device that charges the first battery pack BP1 and the second battery pack BP2 that is larger than the first battery pack BP1. Hereinafter, the first battery pack BP1 and the second battery pack BP2 may be simply referred to as the battery pack BP. The battery pack BP is, for example, a rechargeable secondary battery. Further, the electric device 2 is a case that accommodates a plurality of battery packs BP. The electric device 2 has a substantially rectangular parallelepiped shape. As shown in FIG. 1, the electric device 2 includes a main body case 4, a lid 6, a fastener 8, and a handle 10. Hereinafter, the height direction of the electric device 2 is referred to as the vertical direction, the direction orthogonal to the vertical direction is referred to as the front-rear direction, and the direction orthogonal to the vertical direction and the front-rear direction is referred to as the left-right direction. In this embodiment, the front-rear direction corresponds to the longitudinal direction of the electric device 2, and the left-right direction corresponds to the short-side direction of the electric device 2.

[0042] The main body case 4 has a box shape with an open upper end. The main body case 4 has an accommodation space 12 inside. A plurality of battery packs BP are arranged in the accommodation space 12. As shown in FIG. 3, a cord cover 14 is fixed to the main body case 4 by a fastener 18. An external terminal 16 is fixed to the cord cover 14. When a power adapter (not shown) is connected to the external terminal 16, power is supplied from an external power source (not shown) to the electric device 2. The battery pack BP (see FIG. 1) is charged by the power supplied from the external power source.

[0043] As shown in FIG. 4, the main body case 4 includes a tray unit attachment portion 20 and a peripheral wall 22.

[0044] As shown in FIG. 5, the tray unit attachment portion 20 includes a plurality (nine in this embodiment) of protrusions 24. As shown in FIG. 6, the protrusions 24 protrude upward from the inner bottom surface of the main body case 4. The protrusion 24 includes a cylindrical portion 25a having a substantially cylindrical shape and a bottom wall 25b closing the upper end of the cylindrical portion 25a. The protrusion 24 has a through hole 26 penetrating the bottom wall 25b of the protrusion 24.

[0045] The peripheral wall 22 protrudes upward from the inner bottom surface of the main body case 4. The peripheral wall 22 surrounds the plurality of protrusions 24. The peripheral wall 22 extends along the inner side surface of the main body case 4.

[0046] As shown in FIG. 1, the lid 6 is attached to the main body case 4 so as to be openable and closable. When the lid 6 is open, the user can attach and detach the battery pack BP. As shown in FIG. 7, the lid 6 is maintained in a closed state by engaging with a fastener 8.

[0047] The handle 10 is attached to the outer surface of the main body case 4. The user can hold the handle 10 and carry the electric device 2.

[0048] As shown in FIGS. 3 and 8, the electric device 2 includes a first tray unit 30, a second tray unit 32, and one or more (two in this embodiment) control boards 34 (see FIG. 9). Either the first tray unit 30 or the second tray unit 32 is selectively attached to the tray unit attachment portion 20 (see FIG. 4) of the main body case 4. The shape of the first tray unit 30 is different from the shape of the second tray unit 32. As shown in FIG. 9, the two control boards 34 are selectively attached to either the first tray unit 30 or the second tray unit 32 (see FIG. 8). The control board 34 is electrically connected to the external terminal 16 (see FIG. 8). The control board 34 controls the charging of the battery pack BP (see FIG. 1).

[0049] The first tray unit 30 includes a first lower base member 36 and a plurality (three in this embodiment) of first upper base members 38. The first lower base member 36 and the plurality of first upper base members 38 define the outer shape of the first tray unit 30. The plurality of first upper base members 38 are fixed to the first lower base member 36. The plurality of first upper base members 38 are arranged side by side in the left-right direction.

[0050] The first tray unit 30 includes a first base plate portion 44, a first case attachment portion 46, two first board attachment portions 48, a first peripheral wall portion 50, at least one first battery attachment unit 52, a plurality (twelve in this embodiment) of first battery terminal units 54, and a plurality (twelve in this embodiment) of first battery terminal boards 56 (see FIG. 14). The first base plate portion 44, the first case attachment portion 46, the first board attachment portion 48, and the first peripheral wall portion 50 are formed by the first lower base member 36. The first battery attachment unit 52 is formed by the first lower base member 36 and the first upper base member 38.

[0051] The first base plate portion 44 has a plate shape along the front-rear direction and the left-right direction.

[0052] As shown in FIG. 10, the first case mounting portion 46 includes a plurality (nine in this embodiment) of first case mounting protrusions 58. The first case mounting protrusions 58 extend downward from the lower surface of the first base plate portion 44. The number of the plurality of first case mounting protrusions 58 is the same as the number of the plurality of protrusions 24 (see FIG. 5) of the tray unit mounting portion 20. As shown in FIG. 11, the first case mounting protrusion 58 has a first hole 58a. A thread groove is formed in the first hole 58a. The arrangement of the first holes 58a of the plurality of first case mounting protrusions 58 is the same as the arrangement of the through holes 26 of the plurality of protrusions 24 shown in FIG. 5.

[0053] As shown in FIG. 12, when attaching the first tray unit 30 to the main body case 4, first, the first hole 58a of the first case mounting protrusion 58 is opposed to the through hole 26 (see FIG. 5) of the protrusion 24. Next, a fastener 60 (for example, a screw) is inserted into the cylindrical portion 25a of the protrusion 24 from the outside of the main body case 4. Next, after inserting the fastener 60 into the through hole 26, it is screwed into the thread groove of the first hole 58a. Thereby, the first tray unit 30 can be easily attached to the main body case 4.

[0054] As shown in FIG. 10, two first substrate mounting portions 48 are arranged side by side in the front-rear direction. The first substrate mounting portion 48 includes a plurality (five in this embodiment) of first substrate mounting protrusions 64. The first substrate mounting protrusions 64 extend downward from the lower surface of the first base plate portion 44. As shown in FIG. 11, the first substrate mounting protrusion 64 has a first hole 64a. A thread groove is formed in the first hole 64a. As shown in FIG. 13, by screwing a fastener 66 (for example, a screw) into the first hole 64a (see FIG. 10), the control substrate 34 is attached to the five first substrate mounting protrusions 64. Therefore, one control substrate 34 is attached to one first substrate mounting portion 48. Thereby, the two control substrates 34 are arranged side by side in the front-rear direction.

[0055] As shown in FIG. 10, the first peripheral wall portion 50 extends downward from the lower surface of the first base plate portion 44. The first peripheral wall portion 50 surrounds the first case mounting portion 46 and the two first substrate mounting portions 48. As shown in FIG. 6, when the first tray unit 30 is attached to the main body case 4, the lower end of the first peripheral wall portion 50 is in contact with the upper end of the peripheral wall 22 of the main body case 4. Thereby, the first peripheral wall portion 50, the peripheral wall 22, the first base plate portion 44, and the inner surface of the main body case 4 define a substrate space 70. The two control boards 34 are arranged in the substrate space 70. The substrate space 70 is isolated from the space outside the substrate space 70. Further, a labyrinth structure is formed by fitting a protrusion protruding from the upper end of the peripheral wall 22 into a recess recessed from the lower end of the first peripheral wall portion 50. Therefore, even when the lid 6 (see FIG. 1) is open, it is possible to suppress the intrusion of liquid such as water into the substrate space 70. Thereby, it is suppressed that the liquid touches the control board 34. Further, the main body case 4 has a drain hole 72 penetrating the bottom surface of the main body case 4, and the drain hole 72 is arranged outside the substrate space 70. Therefore, even when liquid intrudes into the main body case 4, the liquid can be discharged to the outside of the main body case 4 through the drain hole 72.

[0056] As shown in FIG. 9, in the present embodiment, at least one first battery mounting unit 52 includes a plurality (three) of first battery mounting units 52. The three first battery mounting units 52 are arranged in a row in the left-right direction. The first battery mounting unit 52 is arranged on the upper surface of the first base plate portion 44. The first battery mounting unit 52 extends in the front-rear direction. The shapes of the three first battery mounting units 52 are substantially the same. The first battery mounting unit 52 includes a first base portion 76 and a plurality (four in this embodiment) of first battery mounting portions 78.

[0057] The first base portion 76 extends upward from the upper surface of the first base plate portion 44. The first base portion 76 extends in the front-rear direction. As shown in FIG. 14, the vertical position of the upper end of the first base portion 76 is substantially the same as the vertical position of the upper end of the main body case 4. For this reason, when the first tray unit 30 is attached to the main body case 4, the first tray unit 30 does not protrude outside the main body case 4. As shown in FIG. 9, the first base portion 76 has four first engagement grooves 80 that are recessed leftward from the right surface of the first base portion 76. The four first engagement grooves 80 are arranged in a row in the front-rear direction. The number of the four first engagement grooves 80 is the same as the number of the four first battery attachment portions 78.

[0058] The first battery attachment portion 78 is disposed on the right surface of the first base portion 76. The four first battery attachment portions 78 are arranged in a row in the front-rear direction. In each of the three first battery attachment units 52, the first battery attachment portion 78 faces rightward. All of the plurality of first battery attachment portions 78 face the same direction. The first battery attachment portion 78 includes a front battery attachment rail portion 82, a rear battery attachment rail portion 84, and a pedestal portion 86.

[0059] The front battery attachment rail portion 82 extends rightward from the right surface of the first base portion 76 and then bends and extends rearward. The front battery attachment rail portion 82 extends in the vertical direction. The rear battery attachment rail portion 84 extends rightward from the right surface of the first base portion 76 and then bends and extends forward. The rear battery attachment rail portion 84 extends in the vertical direction. The first engagement groove 80 is disposed between the front battery attachment rail portion 82 and the rear battery attachment rail portion 84.

[0060] The pedestal portion 86 has a substantially rectangular parallelepiped shape. The pedestal portion 86 is disposed on the right surface of the first base portion 76. The pedestal portion 86 is disposed below the first engagement groove 80. The pedestal portion 86 is disposed between the front battery attachment rail portion 82 and the rear battery attachment rail portion 84.

[0061] The first battery mounting portion 78 can mount the first battery pack BP1 (see FIG. 1). Further, since the width of the second battery pack BP2 (see FIG. 2) is larger than the interval between the first battery mounting units 52 adjacent in the left-right direction, the second battery pack BP2 cannot be mounted on the first battery mounting portion 78.

[0062] As shown in FIG. 15, the first battery pack BP1 includes a first battery pack main body 90 and a mounting structure 91 that can be mounted on the first battery mounting portion 78. The mounting structure 91 of the first battery pack BP1 includes a front rail portion 92, a rear rail portion 94, a contact portion 96, and a hook portion 98. The front rail portion 92 protrudes leftward from the first battery pack main body 90 and then bends and extends forward. The rear rail portion 94 protrudes leftward from the first battery pack main body 90 and then bends and extends rearward. The contact portion 96 is disposed between the front rail portion 92 and the rear rail portion 94. The hook portion 98 is normally urged by a spring (not shown) and protrudes outside the first battery pack main body 90. When the operation portion 100 is pushed in, the hook portion 98 enters the inside of the first battery pack main body 90.

[0063] When attaching the first battery pack BP1 to the first battery mounting portion 78 (see FIG. 9), engage the front rail portion 92 of the first battery pack BP1 with the front battery mounting rail portion 82 (see FIG. 9) of the first battery mounting portion 78, and engage the rear rail portion 94 of the first battery pack BP1 with the rear battery mounting rail portion 84 (see FIG. 9) of the first battery mounting portion 78. Next, slide the first battery pack BP1 downward with respect to the first battery mounting portion 78. At this time, the hook portion 98 is pushed in by the first base portion 76 (see FIG. 9), and when it reaches the first engagement groove 80, it protrudes from the first battery pack body 90. When the hook portion 98 enters the first engagement groove 80, the first battery pack BP1 is prevented from coming out of the first battery mounting portion 78. When removing the first battery pack BP1 from the first battery mounting portion 78, after releasing the engagement between the hook portion 98 and the first engagement groove 80 by pushing in the operation portion 100, slide the first battery pack BP1 upward with respect to the first battery mounting portion 78.

[0064] As shown in FIG. 9, one first battery terminal unit 54 is provided for one first battery mounting portion 78. The first battery terminal unit 54 is disposed between the front battery mounting rail portion 82 and the rear battery mounting rail portion 84. The first battery terminal unit 54 is disposed between the first engagement groove 80 and the pedestal portion 86. The first battery terminal unit 54 includes a plurality of first battery terminals 104.

[0065] The first battery terminal 104 penetrates the right surface of the first base portion 76. The first battery terminal 104 is electrically connected to the first battery pack BP1 when the first battery pack BP1 is attached to the first battery mounting portion 78.

[0066] As shown in FIG. 14, the first battery terminal board 56 is disposed inside the first base portion 76. The first battery terminal board 56 is supported by the first base portion 76. Since a labyrinth structure is formed at the boundary between the first lower base member 36 and the first upper base member 38, intrusion of liquid such as water into the first base portion 76 is suppressed. Thereby, contact of the liquid with the first battery terminal board 56 is suppressed. In the present embodiment, one first battery terminal board 56 is provided for one first battery mounting portion 78. Therefore, the number of the plurality of first battery terminal boards 56 is the same as the number of the plurality of first battery mounting portions 78. The first battery terminal board 56 is disposed along a plane including the vertical direction and the front-rear direction. The plurality of first battery terminals 104 are directly mounted on the first battery terminal board 56. The first battery terminal board 56 is electrically connected to the control board 34 (see FIG. 9). Electric power is supplied from an external power source to the first battery pack BP1 via the external terminal 16 (see FIG. 3), the control board 34, the first battery terminal board 56, and the plurality of first battery terminals 104.

[0067] As shown in FIG. 16, the second tray unit 32 includes a second lower base member 110 and a plurality (two in this embodiment) of second upper base members 112. The second lower base member 110 and the plurality of second upper base members 112 define the outer shape of the second tray unit 32. The plurality of second upper base members 112 are fixed to the second lower base member 110. The plurality of second upper base members 112 are arranged side by side in the left-right direction.

[0068] The second tray unit 32 includes a second base plate portion 116, a second case attachment portion 118 (see FIG. 17), two second substrate attachment portions 120, a second peripheral wall portion 122 (see FIG. 17), at least one second battery attachment unit 124, a plurality (eight in this embodiment) of second battery terminal units 126, and a plurality (eight in this embodiment) of second battery terminal substrates 128 (see FIG. 19). The second base plate portion 116, the second case attachment portion 118, the second substrate attachment portions 120, and the second peripheral wall portion 122 are formed by a second lower base member 110. The second battery attachment unit 124 is formed by the second lower base member 110 and a second upper base member 112.

[0069] The second base plate portion 116 has a plate shape along the front-rear direction and the left-right direction. The region near the center in the left-right direction of the second base plate portion 116 bulges upward.

[0070] As shown in FIG. 17, the second case attachment portion 118 includes a plurality (nine in this embodiment) of second attachment protrusions 132. The second attachment protrusions 132 extend downward from the lower surface of the second base plate portion 116. The number of the plurality of second attachment protrusions 132 is the same as the number of the plurality of protrusions 24 (see FIG. 5) of the tray unit attachment portion 20 and the number of the plurality of first case attachment protrusions 58 (see FIG. 11) of the first tray unit 30, respectively. As shown in FIG. 11, the second attachment protrusion 132 has a second hole 132a. A screw groove is formed in the second hole 132a. The arrangement of the second holes 132a of the plurality of second attachment protrusions 132 is the same as the arrangement of the first holes 58a of the plurality of first case attachment protrusions 58. Further, the second tray unit 32 is attached to the main body case 4 by a fastener 60 (see FIG. 12) used when attaching the first tray unit 30 to the tray unit attachment portion 20. Therefore, the attachment structure of the second case attachment portion 118 for attaching the tray unit attachment portion 20 is the same as the attachment structure of the first case attachment portion 46 for attaching the tray unit attachment portion 20.

[0071] As shown in FIG. 17, the two second substrate mounting portions 120 are arranged side by side in the front-rear direction. The second substrate mounting portion 120 includes a plurality (five in this embodiment) of second substrate mounting protrusions 136. The second substrate mounting protrusion 136 extends downward from the lower surface of the second base plate portion 116. As shown in FIG. 11, the second substrate mounting protrusion 136 has a second hole 136a. A thread groove is formed in the second hole 136a. The arrangement of the second holes 136a of the plurality of second substrate mounting protrusions 136 is the same as the arrangement of the first holes 64a of the plurality of first substrate mounting protrusions 64. As shown in FIG. 18, the control board 34 is mounted by screwing the fastener 66 into the second hole 136a (see FIG. 11). Therefore, the mounting structure of the second substrate mounting portion 120 for mounting the control board 34 is the same as the mounting structure of the first substrate mounting portion 48 for mounting the control board 34. Also, in this embodiment, a common control board 34 is selectively mounted on either the first substrate mounting portion 48 or the second substrate mounting portion 120. Also, one control board 34 is mounted on one second substrate mounting portion 120. For this reason, the two control boards 34 are arranged side by side in the front-rear direction.

[0072] As shown in FIG. 17, the second peripheral wall portion 122 extends downward from the lower surface of the second base plate portion 116. When the second tray unit 32 is attached to the main body case 4 (see FIG. 6), the lower end of the second peripheral wall portion 122 is in contact with the upper end of the peripheral wall 22 of the main body case 4 (see FIG. 6). Thereby, also in the second tray unit 32, the second peripheral wall portion 122, the peripheral wall 22, the second base plate portion 116, and the inner surface of the main body case 4 define a substrate space 70 (see FIG. 6). The two control boards 34 are arranged in the substrate space 70. Also, a labyrinth structure is formed by fitting a protrusion protruding from the upper end of the peripheral wall 22 into a recess recessed from the lower end of the second peripheral wall portion 122. Thereby, it is suppressed that a liquid such as water enters the substrate space 70 and touches the control board 34.

[0073] As shown in FIG. 16, in this embodiment, at least one second battery mounting unit 124 includes a plurality (three) of second battery mounting units 124. Two of the second battery mounting units 124 are arranged in a row in the left-right direction. The number of the two second battery mounting units 124 is different from the number of the three first battery mounting units 52 (see FIG. 9). The shapes of the two second battery mounting units 124 are substantially the same. The second battery mounting unit 124 includes a second base portion 140 and a plurality (four in this embodiment) of second battery mounting portions 142.

[0074] The second base portion 140 extends upward from the upper surface of the second base plate portion 116. The second base portion 140 extends in the front-rear direction. As shown in FIG. 19, the position of the upper end of the second base portion 140 in the vertical direction is located below the position of the upper end of the main body case 4 in the vertical direction. Therefore, when the second tray unit 32 is attached to the main body case 4, the second tray unit 32 does not protrude outside the main body case 4. As shown in FIG. 16, the second base portion 140 has four second engaging grooves 146 that are recessed from the second base portion 140. The four second engaging grooves 146 are arranged in a row in the front-rear direction. The number of the four second engaging grooves 146 is the same as the number of the four second battery mounting portions 142.

[0075] The second battery mounting portion 142 is disposed on the side surface of the second base plate portion 116. The four second battery mounting portions 142 are arranged in a line in the front-rear direction. The number of the four second battery mounting portions 142 is the same as the number of the four first battery mounting portions 78 (see FIG. 9). The direction in which the four second battery mounting portions 142 of one second battery mounting unit 124 face is different from the direction in which the four second battery mounting portions 142 of the other second battery mounting unit 124 face. The four second battery mounting portions 142 of one second battery mounting unit 124 face rightward. The four second battery mounting portions 142 of the other second battery mounting unit 124 face leftward, which is opposite to the right direction. For this reason, the four second battery mounting portions 142 of one second battery mounting unit 124 face the four second battery mounting portions 142 of the other second battery mounting unit 124. Also, the arrangement of the plurality of second battery mounting portions 142 of the second tray unit 32 is different from the arrangement of the plurality of first battery mounting portions 78 of the first tray unit 30.

[0076] The components of the second battery mounting portion 142 are the same as the components of the first battery mounting portion 78. That is, the second battery mounting portion 142 includes a front battery mounting rail portion 82, a rear battery mounting rail portion 84, and a pedestal portion 86. Also, the shape of the second battery mounting portion 142 is the same as the shape of the first battery mounting portion 78. For this reason, a detailed description of the configuration of the second battery mounting portion 142 is omitted.

[0077] The second battery mounting portion 142 is capable of mounting the second battery pack BP2 (see FIG. 2). Further, since the shape of the second battery mounting portion 142 is the same as the shape of the first battery mounting portion 78, the first battery pack BP1 can also be mounted on the second battery mounting portion 142. Therefore, the mounting structure of the second battery mounting portion 142 for mounting the second battery pack BP2 is the same as the mounting structure of the first battery mounting portion 78 for mounting the first battery pack BP1. Also, as shown in FIG. 20, the second battery pack BP2 includes a second battery pack main body 150 and a mounting structure 151 that can be mounted on the second battery mounting portion 142, and the mounting structure 151 of the second battery pack BP2 is the same as the mounting structure 91 (see FIG. 15) of the first battery pack BP1. That is, the mounting structure 151 of the second battery pack BP2 includes a front rail portion 92, a rear rail portion 94, a contact portion 96, and a hook portion 98.

[0078] As shown in FIG. 21, the third battery pack BP3 can be mounted on the second battery mounting portion 142 via the adapter 152. The adapter 152 includes a first adapter mounting portion 152a and a second adapter mounting portion 152b. The structure of the first adapter mounting portion 152a is the same as each of the mounting structure 91 (see FIG. 15) of the first battery pack BP1 and the mounting structure 151 (see FIG. 20) of the second battery pack BP2. Therefore, the adapter 152 can be mounted on the second battery mounting portion 142 via the first adapter mounting portion 152a. Also, the mounting structure 153 of the third battery pack BP3 is different from each of the mounting structure 91 of the first battery pack BP1 and the mounting structure 151 of the second battery pack BP2. Therefore, the third battery pack BP3 cannot be mounted on the second battery mounting portion 142. On the other hand, the mounting structure 153 of the third battery pack BP3 has a shape corresponding to the structure of the second adapter mounting portion 152b of the adapter 152. Therefore, the third battery pack BP3 can be mounted on the adapter 152.

[0079] As shown in FIG. 16, one second battery terminal unit 126 is provided for one second battery mounting portion 142. The arrangement of the second battery terminal unit 126 with respect to the second battery mounting portion 142 is the same as the arrangement of the first battery terminal unit 54 with respect to the first battery mounting portion 78. The second battery terminal unit 126 includes a plurality of second battery terminals 154.

[0080] The second battery terminal 154 penetrates the side surface of the second base portion 140. The second battery terminal 154 is electrically connected to the second battery pack BP2 when the second battery pack BP2 is attached to the second battery mounting portion 142.

[0081] As shown in FIG. 19, the second battery terminal board 128 is disposed inside the second base portion 140. The second battery terminal board 128 is supported by the second base portion 140. Since a labyrinth structure is formed at the boundary between the second lower base member 110 and the second upper base member 112, entry of liquid such as water into the second base portion 140 is suppressed. Thereby, contact of the liquid with the second battery terminal board 128 is suppressed. In this embodiment, one second battery terminal board 128 is provided for one second battery mounting portion 142. Therefore, the number of the plurality of second battery terminal boards 128 is the same as the number of the plurality of second battery mounting portions 142. The second battery terminal board 128 is disposed along a plane including the vertical direction and the front-rear direction. The plurality of second battery terminals 154 are directly mounted on the second battery terminal board 128. The second battery terminal board 128 is electrically connected to the control board 34 (see FIG. 18). Electric power is supplied from an external power source to the second battery pack BP2 via the external terminal 16 (see FIG. 3), the control board 34, the second battery terminal board 128, and the plurality of second battery terminals 154.

[0082] As shown in FIG. 9, the first tray unit 30 further includes a plurality (six in this embodiment) of first battery state display units 160. The first battery state display unit 160 displays the state of the battery pack BP attached to the first battery attachment portion 78. The first battery state display unit 160 is disposed on the first base portion 76. In this embodiment, one first battery state display unit 160 is provided for two adjacent first battery attachment portions 78 in the front-rear direction.

[0083] Also, as shown in FIG. 16, the second tray unit 32 further includes a plurality (two in this embodiment) of second battery state display units 162. The second battery state display unit 162 displays the state of the battery pack BP attached to the second battery attachment portion 142. The second battery state display unit 162 is disposed on the second base portion 140. In this embodiment, one second battery state display unit 162 is provided for two adjacent second battery attachment portions 142 in the front-rear direction. The configuration of the second battery state display unit 162 is the same as that of the first battery state display unit 160.

[0084] Hereinafter, the first battery state display unit 160 will be described as an example. Also, as shown in FIG. 22, with respect to two adjacent first battery attachment portions 78 in the front-rear direction, one first battery attachment portion 78 is referred to as the front battery attachment portion 170, and the other first battery attachment portion 78 is referred to as the rear battery attachment portion 172. Also, as shown in FIG. 23, with respect to two adjacent first battery terminal substrates 56 in the front-rear direction, one first battery terminal substrate 56 is referred to as the front battery terminal substrate 174, and the other first battery terminal substrate 56 is referred to as the rear battery terminal substrate 176.

[0085] As shown in FIG. 22, the first battery state display unit 160 includes a first display unit 180, a second display unit 182, and a lens member 184 (see FIG. 23).

[0086] The first display unit 180 and the second display unit 182 are, for example, display windows. The first display unit 180 displays the state of the battery pack BP attached to the front battery attachment portion 170. The second display unit 182 displays the state of the battery pack BP attached to the rear battery attachment portion 172. The first display unit 180 and the second display unit 182 are disposed at the upper end of the first base portion 76. The first display unit 180 and the second display unit 182 are separated in the front-rear direction. The first display unit 180 and the second display unit 182 are offset in the left-right direction with respect to the front battery attachment portion 170 and the rear battery attachment portion 172. In the front-rear direction, the center position between the first display unit 180 and the second display unit 182 is disposed between the front battery attachment portion 170 and the rear battery attachment portion 172. The center position between the first display unit 180 and the second display unit 182 in the front-rear direction corresponds to the center position of the first battery state display unit 160 in the front-rear direction.

[0087] As shown in FIG. 23, the lens member 184 is disposed between the front battery terminal substrate 174 and the rear battery terminal substrate 176 in the front-rear direction. The lens member 184 faces the side surfaces of the front battery terminal substrate 174 and the rear battery terminal substrate 176 in the front-rear direction, respectively. The lens member 184 is composed of one part. The lens member 184 is made of a light-transmissive material. The light-transmissive material is, for example, polycarbonate, acrylic, polyamide, or ABS. The lens member 184 includes a first transmission portion 190, a second transmission portion 192, and a connecting portion 194.

[0088] The first transmission portion 190 has a curved cylindrical shape. The first transmission portion 190 is configured to transmit light. The first transmission portion 190 includes a first inlet portion 198, a first outlet portion 200, and a first curved portion 202.

[0089] The first inlet portion 198 extends in the front-rear direction. The first inlet portion 198 faces forward. The first inlet portion 198 includes a first inlet surface 198a that faces the front battery terminal substrate 174. The first inlet surface 198a is substantially orthogonal to the front-rear direction.

[0090] The first outlet portion 200 extends in the vertical direction. The first outlet portion 200 faces upward. The direction in which the first outlet portion 200 faces is inclined with respect to the direction in which the first inlet portion 198 faces. The direction in which the first outlet portion 200 faces is substantially orthogonal to the direction in which the first inlet portion 198 faces. The first outlet portion 200 includes a first outlet surface 200a. The first outlet surface 200a is substantially orthogonal to the vertical direction.

[0091] The first curved portion 202 connects the first inlet portion 198 and the first outlet portion 200. The first curved portion 202 is curved.

[0092] The second transmission portion 192 and the first transmission portion 190 are arranged symmetrically with respect to a plane including the vertical direction and the horizontal direction. The shape of the second transmission portion 192 is the same as the shape of the first transmission portion 190. The second transmission portion 192 is separated from the first transmission portion 190 in the front-rear direction. The second transmission portion 192 is configured to transmit light. The second transmission portion 192 includes a second inlet portion 206, a second outlet portion 208, and a second curved portion 210.

[0093] The second inlet portion 206 extends in the front-rear direction. The second inlet portion 206 faces rearward. The direction in which the second inlet portion 206 faces is opposite to the direction in which the first inlet portion 198 faces. The second inlet portion 206 includes a second inlet surface 206a that faces the rear battery terminal substrate 176. The second inlet surface 206a is substantially orthogonal to the front-rear direction.

[0094] The second outlet portion 208 extends in the vertical direction. The second outlet portion 208 faces upward. The direction in which the second outlet portion 208 faces is inclined with respect to the direction in which the second inlet portion 206 faces. The direction in which the second outlet portion 208 faces is substantially orthogonal to the direction in which the second inlet portion 206 faces. The direction in which the second outlet portion 208 faces is substantially the same as the direction in which the first outlet portion 200 faces.

[0095] The second bending part 210 connects the second inlet part 206 and the second outlet part 208. The second bending part 210 is bent.

[0096] The connecting part 194 is disposed between the first transmitting part 190 and the second transmitting part 192. The connecting part 194 connects the first transmitting part 190 and the second transmitting part 192. As shown in FIG. 24, the connecting part 194 includes a first connecting part 214, a second connecting part 216, and an intermediate connecting part 218.

[0097] The first connecting part 214 is disposed between the first outlet part 200 and the second outlet part 208. The first connecting part 214 connects the first outlet part 200 and the second outlet part 208. The first connecting part 214 extends in the front-rear direction.

[0098] The first connecting part 214 has a first right engaging part 222 and a first left engaging part 224. The first right engaging part 222 and the first left engaging part 224 are, for example, grooves. The first right engaging part 222 is recessed leftward from the right end of the first connecting part 214. The first left engaging part 224 is recessed rightward from the left end of the first connecting part 214. The first right engaging part 222 and the first left engaging part 224 are arranged side by side in the left-right direction.

[0099] The second connecting part 216 is separated from the first connecting part 214. The second connecting part 216 is disposed below the first connecting part 214. The second connecting part 216 includes a second upper connecting part 228 and a second lower connecting part 230.

[0100] The second upper connecting part 228 is disposed between the first bending part 202 and the second bending part 210. The second upper connecting part 228 connects the first bending part 202 and the second bending part 210. The second upper connecting part 228 extends in the front-rear direction. The second upper connecting part 228 is substantially parallel to the first connecting part 214.

[0101] The second upper connecting portion 228 has a second right engaging portion 234 and a second left engaging portion 236. The second right engaging portion 234 and the second left engaging portion 236 are, for example, grooves. The second right engaging portion 234 is recessed leftward from the right end of the second upper connecting portion 228. The second right engaging portion 234 is aligned vertically with the first right engaging portion 222. The second left engaging portion 236 is recessed rightward from the left end of the second upper connecting portion 228. The second left engaging portion 236 is aligned vertically with the first left engaging portion 224. The second right engaging portion 234 and the second left engaging portion 236 are aligned horizontally.

[0102] The second lower connecting portion 230 extends downward from the lower end of the second upper connecting portion 228. The second lower connecting portion 230 has a second lower engaging portion 240. The second lower engaging portion 240 is, for example, a groove. The second lower engaging portion 240 is recessed upward from the lower end of the second lower connecting portion 230.

[0103] The intermediate connecting portion 218 is disposed between the first connecting portion 214 and the second upper connecting portion 228. The intermediate connecting portion 218 is separated from the first transmission portion 190 and the second transmission portion 192. The intermediate connecting portion 218 includes a first intermediate connecting portion 244 and a second intermediate connecting portion 246. The first right engaging portion 222, the first left engaging portion 224, the second right engaging portion 234, and the second left engaging portion 236 are disposed between the first intermediate connecting portion 244 and the second intermediate connecting portion 246.

[0104] The first intermediate connecting portion 244 connects the first connecting portion 214 and the second upper connecting portion 228. The first intermediate connecting portion 244 is separated from the first transmission portion 190.

[0105] The second intermediate connecting portion 246 connects the first connecting portion 214 and the second upper connecting portion 228. The second intermediate connecting portion 246 is separated from the second transmission portion 192. The second intermediate connecting portion 246 is separated from the first intermediate connecting portion 244.

[0106] As shown in FIG. 25, the first base portion 76 includes a first engagement rib 250 and a second engagement rib 252. The first engagement rib 250 and the second engagement rib 252 are disposed inside the first base portion 76. The first engagement rib 250 extends upward from the inner surface of the first base portion 76. The first engagement rib 250 engages with the second lower engagement portion 240. Thereby, the movement of the lens member 184 in the front-rear direction is suppressed.

[0107] The second engagement rib 252 extends downward from the inner surface of the first base portion 76. The second engagement rib 252 includes two leg portions 254 (see FIG. 26) and a leg connection portion 255 that connects the two leg portions 254 between the two leg portions 254. As shown in FIG. 26, the leg portion 254 is disposed between the first transmission portion 190 and the second transmission portion 192. Although not shown, the two leg portions 254 extend below the lower end of the leg connection portion 255. As shown in FIG. 25, in the vertical direction, the connection portion 194 is sandwiched between the leg connection portion 255 of the first engagement rib 250 and the second engagement rib 252. Thereby, the movement of the lens member 184 in the vertical direction is suppressed. As shown in FIG. 26, the second engagement rib 252 engages with the first right engagement portion 222 and the first left engagement portion 224 by the two leg portions 254 sandwiching the first connection portion 214 within the first right engagement portion 222 and the first left engagement portion 224. Also, as shown in FIG. 27, the second engagement rib 252 engages with the second right engagement portion 234 and the second left engagement portion 236 by the two leg portions 254 sandwiching the second upper connection portion 228 within the second right engagement portion 234 and the second left engagement portion 236. Thereby, the movement of the lens member 184 in the left-right direction is suppressed.

[0108] As shown in FIG. 23, the first tray unit 30 includes a plurality (12 in this embodiment) of light emitting elements 256. One light emitting element 256 is provided for one first battery terminal substrate 56. Although not shown, the second tray unit 32 also includes a plurality (8 in this embodiment) of light emitting elements 256. One light emitting element 256 is provided for one second battery terminal substrate 128. The configuration of the light emitting element 256 of the first tray unit 30 is the same as the configuration of the light emitting element 256 of the second tray unit 32. Therefore, hereinafter, the light emitting element 256 of the first tray unit 30 will be described as an example. Also, the light emitting element 256 provided for the front battery terminal substrate 174 is referred to as the front light emitting element 258, and the light emitting element 256 provided for the rear battery terminal substrate 176 is referred to as the rear light emitting element 260.

[0109] The front light emitting element 258 is mounted on the mounting surface 174a of the front battery terminal substrate 174. The first battery terminal 104 is mounted on the mounting surface 174a. The mounting surface 174a is along a surface including the front-rear direction and the up-down direction.

[0110] The rear light emitting element 260 is mounted on the mounting surface 176a of the rear battery terminal substrate 176. The first battery terminal 104 is mounted on the mounting surface 176a. The mounting surface 176a is along a surface including the front-rear direction and the up-down direction. The mounting surface 176a is arranged on the same plane as the mounting surface 174a.

[0111] As shown in FIG. 28, the front light emitting element 258 includes a blue light emitting portion 264, a red light emitting portion 266, and a green light emitting portion 268. The blue light emitting portion 264, the red light emitting portion 266, and the green light emitting portion 268 are arranged in a row in the up-down direction. The blue light emitting portion 264, the red light emitting portion 266, and the green light emitting portion 268 face the first entrance surface 198a of the first transmission portion 190.

[0112] The blue light-emitting part 264 emits blue light, for example, when the battery pack BP is being charged. The red light-emitting part 266 emits red light, for example, when an abnormality has occurred in the battery pack BP. The green light-emitting part 268 emits green light when the charging of the battery pack BP is completed. The blue light-emitting part 264, the red light-emitting part 266, and the green light-emitting part 268 face the rear direction along the mounting surface 174a. For this reason, the light emitted by the blue light-emitting part 264, the red light-emitting part 266, and the green light-emitting part 268 travels in the rear direction along the mounting surface 174a.

[0113] The blue light-emitting part 264 is arranged on the extension line of the first central axis AX1 of the first transmission part 190. In FIG. 28, the first central axis AX1 and the extension line of the first central axis AX1 are illustrated by dashed lines. The first central axis AX1 passes through the center of the circle of the cross-section of the first inlet part 198, the center of the circle of the cross-section of the first outlet part 200 (see FIG. 23), and the center of the circle of the cross-section of the first curved part 202.

[0114] The red light-emitting part 266 is arranged above the blue light-emitting part 264. The red light-emitting part 266 is arranged at the vertical center position of the front light-emitting element 258. The red light-emitting part 266 is arranged offset upward with respect to the extension line of the first central axis AX1.

[0115] The green light-emitting part 268 is arranged above the red light-emitting part 266. The green light-emitting part 268 is arranged offset upward with respect to the extension line of the first central axis AX1.

[0116] As shown in FIG. 29, the configuration of the rear light-emitting element 260 is the same as that of the front light-emitting element 258. Therefore, the rear light-emitting element 260 includes a blue light-emitting portion 264, a red light-emitting portion 266, and a green light-emitting portion 268. In the rear light-emitting element 260, the blue light-emitting portion 264, the red light-emitting portion 266, and the green light-emitting portion 268 are arranged in a line in the vertical direction and face the second entrance surface 206a of the second transmission portion 192. Further, in the rear light-emitting element 260, the blue light-emitting portion 264, the red light-emitting portion 266, and the green light-emitting portion 268 face the forward direction along the mounting surface 176a. Therefore, the light emitted by the blue light-emitting portion 264, the red light-emitting portion 266, and the green light-emitting portion 268 travels forward along the mounting surface 176a.

[0117] In the rear light-emitting element 260, the blue light-emitting portion 264 is disposed on the extension line of the second central axis AX2 of the second transmission portion 192. In FIG. 29, the second central axis AX2 and the extension line of the second central axis AX2 are illustrated by broken lines. The second central axis AX2 passes through the center of the circle of the cross-section of the second entrance portion 206, the center of the circle of the cross-section of the second exit portion 208 (see FIG. 23), and the center of the circle of the cross-section of the second curved portion 210.

[0118] In the rear light-emitting element 260, the red light-emitting portion 266 is disposed below the blue light-emitting portion 264. The red light-emitting portion 266 is disposed at the vertical center position of the front light-emitting element 258. The green light-emitting portion 268 is disposed below the red light-emitting portion 266. The red light-emitting portion 266 and the green light-emitting portion 268 are disposed offset downward with respect to the extension line of the second central axis AX2.

[0119] As shown in FIG. 23, when the front light-emitting element 258 emits light, the light enters the first transmission portion 190 from the first entrance surface 198a of the first entrance portion 198. The light from the front light-emitting element 258 passes through the first entrance portion 198, the first curved portion 202, and the first exit portion 200 in sequence, and exits from the first exit surface 200a of the first exit portion 200 to the outside of the first transmission portion 190. In this embodiment, since the intermediate connection portion 218 is separated from each of the first transmission portion 190 and the second transmission portion 192, the light passing through the first transmission portion 190 is suppressed from entering the second transmission portion 192 from the first transmission portion 190. Further, since the two leg portions 254 are disposed between the first transmission portion 190 and the second transmission portion 192, the second engaging rib 252 suppresses the light passing through the first transmission portion 190 from entering the second transmission portion 192 from the first transmission portion 190. The light emitted from the first exit portion 200 passes through the first display portion 180 (see FIG. 22). Thereby, the light from the front light-emitting element 258 is visually recognized by the user.

[0120] When the rear light-emitting element 260 emits light, the light enters the second transmission portion 192 from the second entrance surface 206a of the second entrance portion 206. The light from the rear light-emitting element 260 passes through the second entrance portion 206, the second curved portion 210, and the second exit portion 208 in sequence, and exits from the second exit surface 208a of the second exit portion 208 to the outside of the second transmission portion 192. In this embodiment, since the intermediate connection portion 218 is separated from each of the first transmission portion 190 and the second transmission portion 192, the light passing through the second transmission portion 192 is suppressed from entering the first transmission portion 190 from the second transmission portion 192. Further, since the two leg portions 254 are disposed between the first transmission portion 190 and the second transmission portion 192, the second engaging rib 252 suppresses the light passing through the second transmission portion 192 from entering the first transmission portion 190 from the second transmission portion 192. The light emitted from the second exit portion 208 passes through the second display portion 182 (see FIG. 22). Thereby, the light from the rear light-emitting element 260 is visually recognized by the user.

[0121] (Effect) The electrical device 2 of this embodiment includes a main body case 4 having a first tray unit 30, a second tray unit 32, and a tray unit mounting portion 20 to which either the first tray unit 30 or the second tray unit 32 can be selectively attached. The first tray unit 30 includes a plurality of first battery mounting portions 78 to which a first battery pack BP1 (an example of a first battery) can be attached, a first battery terminal 104 that is electrically connected to the first battery pack BP1 when the first battery pack BP1 is attached to the first battery mounting portion 78, and a first case mounting portion 46 that is attached to the tray unit mounting portion 20. The second tray unit 32 includes a plurality of second battery mounting portions 142 to which a second battery pack BP2 (an example of a second battery) can be attached, a second battery terminal 154 that is electrically connected to the second battery pack BP2 when the second battery pack BP2 is attached to the second battery mounting portion 142, and a second case mounting portion 118 that is attached to the tray unit mounting portion 20. The arrangement of the plurality of second battery mounting portions 142 is different from the arrangement of the plurality of first battery mounting portions 78, or the number of the plurality of second battery mounting portions 142 is different from the number of the plurality of first battery mounting portions 78, or the mounting structure of the second battery mounting portion 142 for attaching the second battery pack BP2 is different from the mounting structure of the first battery mounting portion 78 for attaching the first battery pack BP1.

[0122] According to the above configuration, the first battery pack BP1 is attached to the first battery mounting portion 78 of the first tray unit 30. Also, the second battery pack BP2 is attached to the second battery mounting portion 142 of the second tray unit 32. Therefore, by exchanging the first tray unit 30 and the second tray unit 32, both the first battery pack BP1 and the second battery pack BP2 can be used with one electrical device 2. This can improve the convenience for the user.

[0123] In addition, the mounting structure of the first case mounting portion 46 for mounting the tray unit mounting portion 20 is the same as the mounting structure of the second case mounting portion 118 for mounting the tray unit mounting portion 20.

[0124] According to the above configuration, compared with a configuration in which the mounting structure of the first case mounting portion 46 for mounting the tray unit mounting portion 20 is different from the mounting structure of the second case mounting portion 118 for mounting the tray unit mounting portion 20, it is possible to suppress the structure of the tray unit mounting portion 20 from becoming complicated.

[0125] Also, the mounting structure of the first battery mounting portion 78 for mounting the first battery pack BP1 is the same as the mounting structure of the second battery mounting portion 142 for mounting the second battery pack BP2.

[0126] According to the above configuration, the first battery pack BP1 can be mounted on the second battery mounting portion 142, and the second battery pack BP2 can be mounted on the first battery mounting portion 78. Thereby, the convenience for the user can be enhanced.

[0127] The electric device 2 further includes a control board 34 attached to the first tray unit 30.

[0128] According to the above configuration, after the control board 34 is attached to the first tray unit 30, the first tray unit 30 can be attached to the main body case 4. Thereby, the assemblability of the electric device 2 can be improved.

[0129] Also, the control board 34 can be attached to the second tray unit 32.

[0130] According to the above configuration, a dedicated control board is not required for the second tray unit 32. Thereby, the number of parts of the electric device 2 can be reduced.

[0131] Further, the first tray unit 30 is attached to the tray unit attachment portion 20 via a fastener 60. The fastener 60 is attached to the first tray unit 30 from the outside of the main body case 4.

[0132] According to the above configuration, by inserting the fastener 60 into the main body case 4 from the outside of the main body case 4, the first tray unit 30 is attached to the tray unit attachment portion 20. Thereby, the assemblability of the electric device 2 can be improved.

[0133] Further, the main body case 4 has an accommodation space 12 for accommodating the first tray unit 30 and the second tray unit 32.

[0134] According to the above configuration, since the first tray unit 30 and the second tray unit 32 are protected by the main body case 4, it is possible to suppress damage to the first tray unit 30 and the second tray unit 32.

[0135] Further, the first tray unit 30 includes at least one first battery attachment unit 52. The first battery attachment unit 52 includes two or more first battery attachment portions 78. The second tray unit 32 includes at least one second battery attachment unit 124. The second battery attachment unit 124 includes two or more second battery attachment portions 142. The number of the two or more second battery attachment portions 142 is the same as the number of the two or more first battery attachment portions 78. The number of at least one second battery attachment unit 124 is different from the number of at least one first battery attachment unit 52.

[0136] According to the above configuration, the first tray unit 30 and the second tray unit 32 can be selectively used according to the number of batteries to be used.

[0137] Further, at least one first battery mounting unit 52 includes a plurality of first battery mounting units 52 arranged in a row. At least one second battery mounting unit 124 includes a plurality of second battery mounting units 124 arranged in a row. In two adjacent first battery mounting units 52, two or more first battery mounting portions 78 in each of the two first battery mounting units 52 face the same direction. In two adjacent second battery mounting units 124, the direction in which two or more second battery mounting portions 142 of one of the two second battery mounting units 124 face is different from the direction in which two or more second battery mounting portions 142 of the other of the two second battery mounting units 124 face.

[0138] According to the above configuration, the first tray unit 30 and the second tray unit 32 can be selectively used according to the number and size of the batteries to be used.

[0139] Further, the first tray unit 30 includes a first battery state display unit 160 (an example of a first display unit) that displays the state of the first battery pack BP1.

[0140] According to the above configuration, the state of the first battery pack BP1 can be easily grasped.

[0141] Further, the plurality of first battery mounting portions 78 are arranged in the front-rear direction (an example of a first direction). In the front-rear direction, the center of the first battery state display unit 160 in the front-rear direction is arranged between two adjacent first battery mounting portions 78 in the front-rear direction.

[0142] According to the above configuration, the first battery state display unit 160 can be easily aligned with the two first battery mounting portions 78.

[0143] (Second Embodiment) In the second embodiment, only the differences from the first embodiment will be described. As shown in FIG. 30, the number of at least one first battery mounting unit 52 in the second embodiment (i.e., two) is less than the number of at least one first battery mounting unit 52 in the first embodiment (i.e., three). Also, the arrangement of the plurality of first battery mounting portions 78 of the first tray unit 30 is different from the arrangement of the plurality of second battery mounting portions 142 (see FIG. 7) of the second tray unit 32.

[0144] In the second embodiment, the first tray unit 30 further includes a partition wall 352. The partition wall 352 extends upward from the upper surface of the first base plate portion 44. The partition wall 352 extends in the front-rear direction. The partition wall 352 is spaced apart from the inner surface of the main body case 4. Thereby, a tool storage space 354 is defined between the partition wall 352 and the inner surface of the main body case 4. A tool 360 such as an impact driver is disposed in the tool storage space 354. The tool 360 may be operated by the power of the battery pack BP, or may be operated by the power of another type of battery pack. Both the tool 360 and the battery pack BP (see FIG. 1) can be housed in the electric device 2.

[0145] (Effect) The electrical device 2 of this embodiment is a case. The electrical device 2 includes a main body case 4 having a first tray unit 30, a second tray unit 32, and a tray unit attachment portion 20 to which either the first tray unit 30 or the second tray unit 32 can be selectively attached. The first tray unit 30 includes a plurality of first battery attachment portions 78, to each of which a first battery pack BP1 (an example of a first battery) can be attached, and a first case attachment portion 46 attached to the tray unit attachment portion 20. The second tray unit 32 includes a plurality of second battery attachment portions 142, to each of which a second battery pack BP2 (an example of a second battery) can be attached, and a second case attachment portion 118 attached to the tray unit attachment portion 20. The main body case 4 can accommodate the first battery pack BP1 and the second battery pack BP2. The arrangement of the plurality of second battery attachment portions 142 is different from the arrangement of the plurality of first battery attachment portions 78, or the number of the plurality of second battery attachment portions 142 is different from the number of the plurality of first battery attachment portions 78, or the attachment structure of the second battery attachment portion 142 for attaching the second battery pack BP2 is different from the attachment structure of the first battery attachment portion 78 for attaching the first battery pack BP1.

[0146] According to the above configuration, the first battery pack BP1 is attached to the first battery attachment portion 78 of the first tray unit 30. Also, the second battery pack BP2 is attached to the second battery attachment portion 142 of the second tray unit 32. Therefore, by exchanging the first tray unit 30 and the second tray unit 32, both the first battery pack BP1 and the second battery pack BP2 can be used with one electrical device 2. Thereby, the convenience for the user can be enhanced.

[0147] Also, the attachment structure of the first case attachment portion 46 for attaching the tray unit attachment portion 20 is the same as the attachment structure of the second case attachment portion 118 for attaching the tray unit attachment portion 20.

[0148] According to the above configuration, compared with the configuration in which the mounting structure of the first case mounting portion 46 for mounting the tray unit mounting portion 20 is different from the mounting structure of the second case mounting portion 118 for mounting the tray unit mounting portion 20, it is possible to suppress the complexity of the structure of the tray unit mounting portion 20.

[0149] Also, the mounting structure of the first battery mounting portion 78 for mounting the first battery pack BP1 is the same as the mounting structure of the second battery mounting portion 142 for mounting the second battery pack BP2.

[0150] According to the above configuration, the first battery pack BP1 can be mounted on the second battery mounting portion 142, and the second battery pack BP2 can be mounted on the first battery mounting portion 78. Thereby, the convenience for the user can be improved.

[0151] Also, the electric device 2 can accommodate the tool 360.

[0152] Since the first battery pack BP1, the second battery pack BP2, and the tool 360 are accommodated in the case, the convenience for the user can be further improved.

[0153] (Third Embodiment) In the third embodiment, only the differences from the first embodiment will be described. As shown in FIG. 31, the configuration of the second battery mounting portion 142 of the second tray unit 32 in the third embodiment is different from the configuration of the second battery mounting portion 142 of the second tray unit 32 in the first embodiment.

[0154] The shape of the second battery attachment portion 142 is the same as the shape of the second adapter attachment portion 152b of the adapter 152 of the first embodiment. Therefore, the attachment structure of the second battery attachment portion 142 for attaching the battery pack BP is the same as the attachment structure of the second adapter attachment portion 152b for attaching the battery pack BP. For this reason, the first battery pack BP1 (see FIG. 15) and the second battery pack BP2 (see FIG. 20) cannot be attached to the second battery attachment portion 142. On the other hand, the third battery pack BP3 (see FIG. 21) can be attached to the second battery attachment portion 142. Therefore, the attachment structure of the second battery attachment portion 142 for attaching the third battery pack BP3 is different from the attachment structure of the first battery attachment portion 78 of the first tray unit 30 for attaching the first battery pack BP1.

[0155] (Modification) In the electric device 2 according to one embodiment, the first battery state display portion 160 and the second battery state display portion 162 may include only one of the first display portion 180 and the second display portion 182. In this configuration, the first display portion 180 displays both the light from the front light emitting element 258 and the light from the rear light emitting element 260.

[0156] In one embodiment, the center of the first battery state display portion 160 in the front-rear direction may not be disposed between the front battery attachment portion 170 and the rear battery attachment portion 172.

[0157] In one embodiment, the direction in which the first entrance portion 198 of the first transmission portion 190 faces may not be opposite to the direction in which the second entrance portion 206 of the second transmission portion 192 faces.

[0158] In one embodiment, one first battery terminal board 56 may be provided for a plurality of first battery attachment portions 78. Also, one second battery terminal board 128 may be provided for a plurality of second battery attachment portions 142.

[0159] In one embodiment, only one control board 34 may be attached to the first tray unit 30 or may be attached to the second tray unit 32.

[0160] In one embodiment, the electric device 2 may include a first control board attached to the first tray unit 30 and a second control board attached to the second tray unit 32.

[0161] The configuration for attaching the first tray unit 30 and the second tray unit 32 to the main body case 4 is not limited to the fastener 60, and may be, for example, a snap - fit type configuration.

[0162] In one embodiment, the first tray unit 30 may not include a first battery terminal unit 54 and a first battery terminal board 56. The second tray unit 32 may not include a second battery terminal unit 126 and a second battery terminal board 128.

[0163] In one embodiment, either the number of at least one first battery mounting unit 52 or the number of at least one second battery mounting unit 124 may be one.

[0164] In one embodiment, in two adjacent second battery mounting units 124, the four second battery mounting portions 142 of one second battery mounting unit 124 may face left, and the four second battery mounting portions 142 of the other second battery mounting unit 124 may face right. For this reason, the back surface of the second base portion 140 of one second battery mounting unit 124 faces the back surface of the second base portion 140 of the other second battery mounting unit 124. Also, the direction in which the four second battery mounting portions 142 of one second battery mounting unit 124 face may be inclined by a first angle with respect to the direction in which the four second battery mounting portions 142 of the other second battery mounting unit 124 face. The first angle may be greater than 0 degrees and less than 180 degrees.

Description of Reference Numerals

[0165] 2: Electrical equipment 4: Main body case 6: Cover 12: Accommodation space 20: Tray unit mounting part 30: First tray unit 32: Second tray unit 34: Control board 46: First case mounting part 48: First board mounting part 52: First battery mounting unit 54: First battery terminal unit 56: First battery terminal board 78: First battery mounting part 104: First battery terminal 118: Second case mounting part 120: Second board mounting part 124: Second battery mounting unit 126: Second battery terminal unit 128: Second battery terminal board 142: Second battery mounting part 152: Adapter 154: Second battery terminal 160: First battery status display part 162: Second battery status display part 170: Front battery mounting part 172: Rear battery mounting part 174: Front battery terminal board 174a: Mounting surface 176: Rear battery terminal board 176a: Mounting surface 180: First display part 182: Second display part 184: Lens member 190: First transmission part 192: Second transmission part 194: Connection part 198: First entrance part 200: First exit part 206: Second inlet 208: Second outlet 214: First connection part 216: Second connection part 218: Intermediate connection part 222: First right engagement part 224: First left engagement part 228: Second upper connection part 230: Second lower connection part 234: Second right engagement part 236: Second left engagement part 240: Second lower engagement part 244: First intermediate connection part 246: Second intermediate connection part 256: Light-emitting element 258: Front light-emitting element 260: Rear light-emitting element 264: Blue light-emitting part 266: Red light-emitting part 268: Green light-emitting part 360: Tool AX1: First central axis AX2: Second central axis BP: Battery pack BP1: First battery pack BP2: Second battery pack BP3: Third battery pack

Claims

1. a first tray unit, a second tray unit, a main body case including a tray unit attachment portion to which either one of the first tray unit and the second tray unit can be selectively attached, The first tray unit includes: a plurality of first battery attachment portions to each of which a first battery can be attached; a first battery terminal electrically connected to the first battery when the first battery is attached to the first battery attachment portion; a first case attachment portion attached to the tray unit attachment portion; The second tray unit includes: a plurality of second battery attachment portions to each of which a second battery can be attached; a second battery terminal electrically connected to the second battery when the second battery is attached to the second battery attachment portion; a second case attachment portion attached to the tray unit attachment portion; an electrical device in which the arrangement of the plurality of second battery attachment portions is different from the arrangement of the plurality of first battery attachment portions, or the number of the plurality of second battery attachment portions is different from the number of the plurality of first battery attachment portions, or the attachment structure of the second battery attachment portion for attaching the second battery is different from the attachment structure of the first battery attachment portion for attaching the first battery.

2. The electrical device according to claim 1, wherein the attachment structure of the first case attachment portion for attaching the tray unit attachment portion is the same as the attachment structure of the second case attachment portion for attaching the tray unit attachment portion.

3. The electrical device according to claim 1 or 2, wherein the attachment structure of the first battery attachment portion for attaching the first battery is the same as the attachment structure of the second battery attachment portion for attaching the second battery.

4. The electrical device according to any one of claims 1 to 3, further including a control board attached to the first tray unit.

5. The electrical device according to claim 4, wherein the control board can be attached to the second tray unit.

6. The first tray unit is attached to the tray unit attachment portion via a fastener, The fastening device is attached to the first tray unit from the outside of the main body case, and the electrical device according to any one of claims 1 to 5.

7. The main body case has an accommodation space for accommodating the first tray unit and the second tray unit, and the electrical device according to any one of claims 1 to 6.

8. The first tray unit includes at least one first battery mounting unit, The first battery mounting unit includes two or more of the first battery mounting portions, The second tray unit includes at least one second battery mounting unit, The second battery mounting unit includes two or more of the second battery mounting portions, The number of the two or more second battery mounting portions is the same as the number of the two or more first battery mounting portions, The number of the at least one second battery mounting unit is different from the number of the at least one first battery mounting unit, and the electrical device according to any one of claims 1 to 7.

9. The at least one first battery mounting unit includes a plurality of the first battery mounting units arranged in a row, The at least one second battery mounting unit includes a plurality of the second battery mounting units arranged in a row, In two adjacent first battery mounting units, the two or more first battery mounting portions in each of the two first battery mounting units face the same direction, In two adjacent second battery mounting units, the direction in which one of the two or more second battery mounting portions in the two second battery mounting units faces is different from the direction in which the other of the two or more second battery mounting portions in the two second battery mounting units faces, and the electrical device according to claim 8.

10. The first tray unit includes a first display unit for displaying the state of the first battery, and the electrical device according to any one of claims 1 to 9.

11. The plurality of first battery mounting portions are arranged in a first direction, With respect to the first direction, the center of the first display unit in the first direction is arranged between two first battery mounting portions adjacent to each other in the first direction, and the electrical device according to claim 10.

12. A first tray unit, A second tray unit, A main body case including a tray unit attachment portion to which either one of the first tray unit and the second tray unit can be selectively attached. The first tray unit includes a plurality of first battery attachment portions, to each of which a first battery can be attached, and the plurality of first battery attachment portions, and a first case attachment portion attached to the tray unit attachment portion. The second tray unit includes a plurality of second battery attachment portions, to each of which a second battery can be attached, and the plurality of second battery attachment portions, and a second case attachment portion attached to the tray unit attachment portion. The main body case can accommodate the first battery and the second battery. A case in which the arrangement of the plurality of second battery attachment portions is different from the arrangement of the plurality of first battery attachment portions, or the number of the plurality of second battery attachment portions is different from the number of the plurality of first battery attachment portions, or the attachment structure of the second battery attachment portion for attaching the second battery is different from the attachment structure of the first battery attachment portion for attaching the first battery.

13. The case according to claim 12, wherein the attachment structure of the first case attachment portion for attaching the tray unit attachment portion is the same as the attachment structure of the second case attachment portion for attaching the tray unit attachment portion.

14. The case according to claim 12 or 13, wherein the attachment structure of the first battery attachment portion for attaching the first battery is the same as the attachment structure of the second battery attachment portion for attaching the second battery.

15. The case according to any one of claims 12 to 14, wherein the case can accommodate tools.

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