Electrical apparatus

Abstract

To provide an art which enables reduction of the number of components of an electric apparatus.SOLUTION: An electrical apparatus includes: a first battery attachment portion to which a first battery is attached; a second battery attachment portion to which a second battery is attached; a first light emitting device configured to emit light according to a state of the first battery; a second light emitting device configured to emit light according to a state of the second battery; and a battery status display part. The battery status display part includes: a lens member configured to transmit the light emitted by the first light emitting device and the light emitted by the second light emitting device; and at least one display part configured to display the light transmitted through the lens member.SELECTED DRAWING: Figure 23

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses an electrical device. The electrical device includes a first battery attachment portion to which a first battery is attached, a first light-emitting element that emits light according to the state of the first battery, a lens member that transmits the light from the first light-emitting element, and a display portion that displays the light transmitted through the lens member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above electrical device, one lens member is used for one battery attachment portion. Therefore, when the electrical device includes a plurality of battery attachment portions, the same number of lens members as the number of the plurality of battery attachment portions is required. As a result, the number of parts of the electrical device increases. This specification provides a technology capable of reducing the number of parts of the electrical device.

Means for Solving the Problems

[0005] This specification discloses an electrical device. The electrical device includes a first battery mounting portion to which a first battery is attached, a second battery mounting portion to which a second battery is attached, a first light-emitting element that emits light according to the state of the first battery, a second light-emitting element that emits light according to the state of the second battery, and a battery state display portion. The battery state display portion includes a lens member that transmits the light from the first light-emitting element and the light from the second light-emitting element, and at least one display portion that displays the light transmitted through the lens member.

[0006] According to the above configuration, one lens member is used for the first battery mounting portion and the second battery mounting portion, that is, two battery mounting portions. Thereby, the number of parts of the electrical device can be reduced.

Brief Description of the Drawings

[0007]

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Mode for Carrying Out the Invention

[0008] Representative 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, their manufacturing methods, and usage methods.

[0009] Also, the combinations of features and steps disclosed in the following detailed description are not essential for implementing the present invention in the broadest sense and are described only for the purpose of explaining representative specific examples of the present invention. Furthermore, the various features of the following representative specific examples, as well as the various features described in the claims, do not have to be combined as described in the specific examples here or in the order listed when providing additional and useful embodiments of the present invention.

[0010] All features described in this specification and / or the claims are intended to be disclosed separately and independently of each other, as limitations on the initial disclosure and the specific matters described in the claims, apart from the configurations of the features described in the embodiments and / or the claims. Further, all descriptions regarding numerical ranges and groups or collections are made with the intention of disclosing intermediate configurations as limitations on the initial disclosure and the specific matters described in the claims.

[0011] In one or more embodiments, the first battery mounting portion and the second battery mounting portion may be arranged side by side in a first direction. With respect to the first direction, the center of the battery state display portion in the first direction may be arranged between the first battery mounting portion and the second battery mounting portion.

[0012] According to the above configuration, the battery state display portion can be easily aligned with the first battery mounting portion and the second battery mounting portion.

[0013] In one or more embodiments, the at least one display portion may include a first display portion that displays the light from the first light emitting element transmitted through the lens member, and a second display portion that displays the light from the second light emitting element transmitted through the lens member.

[0014] According to the above configuration, the state of the first battery and the state of the second battery can be easily grasped.

[0015] In one or more embodiments, the lens member may include a first transmission portion that transmits the light from the first light emitting element, and a second transmission portion that transmits the light from the second light emitting element.

[0016] According to the above configuration, compared with a configuration in which one transmission portion transmits the light from the first light emitting element and the light from the second light emitting element, the light from the first light emitting element and the light from the second light emitting element can be easily separated within the lens member.

[0017] In one or more embodiments, the first transmissive portion may face the second direction and include a first inlet portion into which the light from the first light-emitting element enters, and may face a third direction inclined with respect to the second direction and include a first outlet portion through which the light from the first light-emitting element exits.

[0018] According to the above configuration, the light can be made to exit from the first outlet portion in a direction different from the direction of the light entering the first inlet portion.

[0019] In one or more embodiments, the third direction may be substantially orthogonal to the second direction.

[0020] According to the above configuration, the degree of freedom in arranging at least one display portion and the first light-emitting element can be increased.

[0021] In one or more embodiments, the second transmissive portion may face a fourth direction opposite to the second direction and include a second inlet portion into which the light from the second light-emitting element enters, and may face the third direction and include a second outlet portion through which the light from the second light-emitting element exits.

[0022] According to the above configuration, even when the direction of the light emitted by the first light-emitting element and the direction of the light emitted by the second light-emitting element are different, the direction of the light from the first light-emitting element exiting from the first outlet portion is the same as the direction of the light from the second light-emitting element exiting from the second outlet portion. Thereby, the states of the first battery and the second battery can be easily grasped.

[0023] In one or more embodiments, the first transmissive portion and the second transmissive portion may be separated. The lens member may further include a connecting portion that connects the first transmissive portion and the second transmissive portion.

[0024] According to the above configuration, in the configuration where the first transmissive portion and the second transmissive portion are in contact, light passing through the first transmissive portion may enter the second transmissive portion, and light passing through the second transmissive portion may enter the first transmissive portion. According to the above configuration, the first transmissive portion and the second transmissive portion are separated, and the connecting portion connects the first transmissive portion and the second transmissive portion. Therefore, it is possible to suppress light passing through the first transmissive portion from entering the second transmissive portion and light passing through the second transmissive portion from entering the first transmissive portion. Further, the position of the second transmissive portion with respect to the first transmissive portion can be fixed by the connecting portion.

[0025] In one or more embodiments, the electric device may further include a base portion where the first battery mounting portion and the second battery mounting portion are disposed. The connecting portion may include an engaging portion that engages with the base portion.

[0026] According to the above configuration, since the engaging portion engages with the base portion, the first transmissive portion and the second transmissive portion can be formed into shapes suitable for light transmission.

[0027] In one or more embodiments, the connecting portion may include a first connecting portion that connects the first transmissive portion and the second transmissive portion, and a second connecting portion that is separated from the first connecting portion and connects the first transmissive portion and the second transmissive portion.

[0028] According to the above configuration, compared with a configuration in which the connecting portion includes only one of the first connecting portion and the second connecting portion, the rigidity of the lens member can be increased. Thereby, the positioning accuracy of the second transmissive portion with respect to the first transmissive portion can be improved.

[0029] In one or more embodiments, the connecting portion may be separated from the first transmissive portion and the second transmissive portion, and may further include an intermediate connecting portion that connects the first connecting portion and the second connecting portion.

[0030] According to the above configuration, while suppressing the light passing through the first transmissive portion from entering the second transmissive portion and the light passing through the second transmissive portion from entering the first transmissive portion, the rigidity of the lens member can be made higher, so that the positioning accuracy of the second transmissive portion with respect to the first transmissive portion can be further improved.

[0031] In one or more embodiments, the intermediate connection portion may include a first intermediate connection portion connecting the first connection portion and the second connection portion, and a second intermediate connection portion that is separated from the first intermediate connection portion and connects the first connection portion and the second connection portion.

[0032] According to the above configuration, while suppressing the light passing through the first transmissive portion from entering the second transmissive portion and the light passing through the second transmissive portion from entering the first transmissive portion, the rigidity of the lens member can be made higher, so that the positioning accuracy of the second transmissive portion with respect to the first transmissive portion can be further improved.

[0033] In one or more embodiments, the extension line of the central axis of the first transmissive portion may be arranged offset with respect to the central position of the first light-emitting element.

[0034] According to the above configuration, the degree of freedom in arranging the first light-emitting element and the first transmissive portion can be increased.

[0035] In one or more embodiments, the first light-emitting element may include a blue light-emitting portion that emits blue light and a red light-emitting portion that emits red light. The blue light-emitting portion may be arranged on the extension line of the central axis of the first transmissive portion.

[0036] Normally, blue light is more difficult for people to visually recognize than red light. According to the above configuration, compared with a configuration in which a blue light-emitting portion that emits blue light and is difficult for people to visually recognize is not arranged on the extension line of the central axis of the first transmissive portion, blue can be made easier to visually recognize.

[0037] In one or more embodiments, the electrical device may further include a first battery terminal that is electrically connected to the first battery when the first battery is attached to the first battery attachment portion, and a first battery terminal substrate on which the first battery terminal is mounted. The first light-emitting element may be mounted on the first battery terminal substrate.

[0038] Normally, a dedicated substrate on which the first light-emitting element is mounted is used. According to the above configuration, the first light-emitting element is mounted on the first battery terminal substrate on which the first battery terminal is mounted. Therefore, a dedicated substrate on which the first light-emitting element is mounted is not required. As a result, the number of parts of the electrical device can be reduced.

[0039] In one or more embodiments, the electrical device may further include a second battery terminal that is electrically connected to the second battery when the second battery is attached to the second battery attachment portion, and a second battery terminal substrate on which the second battery terminal is mounted. The lens member may be disposed between the first battery terminal substrate and the second battery terminal substrate.

[0040] According to the above configuration, the space between the first battery terminal substrate and the second battery terminal substrate is utilized. Thereby, it is possible to suppress the electrical device from becoming larger in size.

[0041] In one or more embodiments, the first light-emitting element may be mounted on the mounting surface of the first battery terminal substrate and may be oriented in a direction along the mounting surface.

[0042] According to the above configuration, the lens member is arranged in a direction along the mounting surface with respect to the first light-emitting element. On the other hand, in a configuration where the first light-emitting element emits light in a direction orthogonal to the mounting surface, the lens member is arranged in a direction orthogonal to the mounting surface with respect to the first light-emitting element. According to the above configuration, it is possible to suppress the increase in size of the electric device in the direction orthogonal to the mounting surface as compared with the configuration in which the first light-emitting element emits light in a direction orthogonal to the mounting surface.

[0043] (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. Also, the electric device 2 is a case that houses 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 will be referred to as the vertical direction, the direction orthogonal to the vertical direction will be referred to as the front-rear direction, and the direction orthogonal to the vertical direction and the front-rear direction will be 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.

[0044] 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.

[0045] As shown in FIG. 4, the main body case 4 includes a tray unit mounting portion 20 and a peripheral wall 22.

[0046] As shown in FIG. 5, the tray unit mounting portion 20 includes a plurality (nine in this embodiment) of protrusions 24. As shown in FIG. 6, the protrusions 24 project 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.

[0047] The peripheral wall 22 projects 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.

[0048] 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 the fastener 8.

[0049] 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.

[0050] 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 mounting 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 to the battery pack BP (see FIG. 1).

[0051] 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.

[0052] The first tray unit 30 includes a first base plate portion 44, a first case mounting portion 46, two first substrate mounting portions 48, a first peripheral wall portion 50, at least one first battery mounting 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 substrates 56 (see FIG. 14). The first base plate portion 44, the first case mounting portion 46, the first substrate mounting portion 48, and the first peripheral wall portion 50 are formed by the first lower base member 36. The first battery mounting unit 52 is formed by the first lower base member 36 and the first upper base members 38.

[0053] The first base plate portion 44 has a plate shape along the front - rear direction and the left - right direction.

[0054] 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 screw 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.

[0055] 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 attachment projection 58 is opposed to the through hole 26 (see FIG. 5) of the projection 24. Next, a fastener 60 (for example, a screw) is inserted into the cylindrical portion 25a of the projection 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 screw groove of the first hole 58a. Thereby, the first tray unit 30 can be easily attached to the main body case 4.

[0056] As shown in FIG. 10, the two first substrate attachment portions 48 are arranged side by side in the front-rear direction. The first substrate attachment portion 48 includes a plurality (five in this embodiment) of first substrate attachment projections 64. The first substrate attachment projection 64 extends downward from the lower surface of the first base plate portion 44. As shown in FIG. 11, the first substrate attachment projection 64 has a first hole 64a. A screw 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 board 34 is attached to the five first substrate attachment projections 64. Therefore, one control board 34 is attached to one first substrate attachment portion 48. Thereby, the two control boards 34 are arranged side by side in the front-rear direction.

[0057] 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 attachment portion 46 and the two first substrate attachment 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 liquids 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.

[0058] As shown in FIG. 9, in the present embodiment, at least one first battery attachment unit 52 includes a plurality (three) of first battery attachment units 52. The three first battery attachment units 52 are arranged in a row in the left - right direction. The first battery attachment unit 52 is arranged on the upper surface of the first base plate portion 44. The first battery attachment unit 52 extends in the front - rear direction. The shapes of the three first battery attachment units 52 are substantially the same. The first battery attachment unit 52 includes a first base portion 76 and a plurality (four in this embodiment) of first battery attachment portions 78.

[0059] 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 position of the upper end of the first base portion 76 in the vertical direction is substantially the same as the position of the upper end of the main body case 4 in the vertical direction. Therefore, 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 biased 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.

[0065] 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 protrudes from the first battery pack body 90 when reaching the first engagement groove 80. 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] As shown in FIG. 16, the second tray unit 32 includes a second lower base member 110 and a plurality (two in the present 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.

[0070] 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.

[0071] 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.

[0072] 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 each of 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. 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.

[0073] 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 screw 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. Further, 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.

[0074] 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. 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 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.

[0075] 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 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.

[0076] 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 vertical position of the upper end of the second base portion 140 is lower than the vertical position of the upper end of the main body case 4. 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.

[0077] 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.

[0078] The components of the second battery mounting portion 142 are the same as those 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.

[0079] The second battery mounting portion 142 can mount a 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.

[0080] As shown in FIG. 21, a third battery pack BP3 can be mounted on the second battery mounting portion 142 via an 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.

[0081] 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.

[0082] 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.

[0083] 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, intrusion 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.

[0084] 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.

[0085] 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.

[0086] 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 boards 56 in the front-rear direction, one first battery terminal board 56 is referred to as the front battery terminal board 174, and the other first battery terminal board 56 is referred to as the rear battery terminal board 176.

[0087] 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).

[0088] 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 arranged 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 arranged 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.

[0089] As shown in FIG. 23, the lens member 184 is arranged between the front battery terminal board 174 and the rear battery terminal board 176 in the front-rear direction. The lens member 184 faces the side surfaces of the front battery terminal board 174 and the rear battery terminal board 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-transmitting material. The light-transmitting 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.

[0090] 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.

[0091] 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 board 174. The first inlet surface 198a is substantially orthogonal to the front-rear direction.

[0092] The first exit portion 200 extends in the vertical direction. The first exit portion 200 faces upward. The direction in which the first exit portion 200 faces is inclined with respect to the direction in which the first inlet portion 198 faces. The direction in which the first exit portion 200 faces is substantially orthogonal to the direction in which the first inlet portion 198 faces. The first exit portion 200 includes a first exit surface 200a. The first exit surface 200a is substantially orthogonal to the vertical direction.

[0093] The first curved portion 202 connects the first inlet portion 198 and the first exit portion 200. The first curved portion 202 is curved.

[0094] 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 exit portion 208, and a second curved portion 210.

[0095] 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.

[0096] The second exit portion 208 extends in the vertical direction. The second exit portion 208 faces upward. The direction in which the second exit portion 208 faces is inclined with respect to the direction in which the second inlet portion 206 faces. The direction in which the second exit portion 208 faces is substantially orthogonal to the direction in which the second inlet portion 206 faces. The direction in which the second exit portion 208 faces is substantially the same as the direction in which the first exit portion 200 faces.

[0097] The second bending part 210 connects the second inlet part 206 and the second outlet part 208. The second bending part 210 is bent.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] The second upper connection part 228 has a second right engaging part 234 and a second left engaging part 236. The second right engaging part 234 and the second left engaging part 236 are, for example, grooves. The second right engaging part 234 is recessed leftward from the right end of the second upper connection part 228. The second right engaging part 234 is aligned vertically with the first right engaging part 222. The second left engaging part 236 is recessed rightward from the left end of the second upper connection part 228. The second left engaging part 236 is aligned vertically with the first left engaging part 224. The second right engaging part 234 and the second left engaging part 236 are aligned horizontally.

[0104] The second lower connection part 230 extends downward from the lower end of the second upper connection part 228. The second lower connection part 230 has a second lower engaging part 240. The second lower engaging part 240 is, for example, a groove. The second lower engaging part 240 is recessed upward from the lower end of the second lower connection part 230.

[0105] The intermediate connection part 218 is disposed between the first connection part 214 and the second upper connection part 228. The intermediate connection part 218 is separated from the first transmission part 190 and the second transmission part 192. The intermediate connection part 218 includes a first intermediate connection part 244 and a second intermediate connection part 246. The first right engaging part 222, the first left engaging part 224, the second right engaging part 234, and the second left engaging part 236 are disposed between the first intermediate connection part 244 and the second intermediate connection part 246.

[0106] The first intermediate connection part 244 connects the first connection part 214 and the second upper connection part 228. The first intermediate connection part 244 is separated from the first transmission part 190.

[0107] The second intermediate connection part 246 connects the first connection part 214 and the second upper connection part 228. The second intermediate connection part 246 is separated from the second transmission part 192. The second intermediate connection part 246 is separated from the first intermediate connection part 244.

[0108] 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.

[0109] 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 when the two leg portions 254 sandwich the first connection portion 214 within the first right engagement portion 222 and the first left engagement portion 224. Further, 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 when the two leg portions 254 sandwich 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.

[0110] 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. For this reason, 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 called the front light emitting element 258, and the light emitting element 256 provided for the rear battery terminal substrate 176 is called the rear light emitting element 260.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] The blue light-emitting portion 264 emits light in blue, for example, when the battery pack BP is being charged. The red light-emitting portion 266 emits light in red, for example, when an abnormality has occurred in the battery pack BP. The green light-emitting portion 268 emits light in green when the charging of the battery pack BP is completed. The blue light-emitting portion 264, the red light-emitting portion 266, and the green light-emitting portion 268 face rearward along the mounting surface 174a. For this reason, the light emitted by the blue light-emitting portion 264, the red light-emitting portion 266, and the green light-emitting portion 268 travels rearward along the mounting surface 174a.

[0115] The blue light-emitting portion 264 is disposed on the extension line of the first central axis AX1 of the first transmission portion 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 portion 198, the center of the circle of the cross-section of the first outlet portion 200 (see FIG. 23), and the center of the circle of the cross-section of the first curved portion 202.

[0116] The red light-emitting portion 266 is disposed above 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 red light-emitting portion 266 is disposed offset upward with respect to the extension line of the first central axis AX1.

[0117] The green light-emitting portion 268 is disposed above the red light-emitting portion 266. The green light-emitting portion 268 is disposed offset upward with respect to the extension line of the first central axis AX1.

[0118] 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. For this reason, 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 row 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. For this reason, the light emitted from 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.

[0119] 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.

[0120] 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.

[0121] 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. Also, 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 exiting 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.

[0122] 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. Also, 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 exiting 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.

[0123] (Effect) The electrical device 2 of this embodiment includes a front battery attachment portion 170 (an example of a first battery attachment portion) to which a first battery pack BP1 (an example of a first battery) is attached, a rear battery attachment portion 172 (an example of a second battery attachment portion) to which the first battery pack BP1 (an example of a second battery) is attached, a front light emitting element 258 (an example of a first light emitting element) that emits light according to the state of the first battery pack BP1, a rear light emitting element 260 (an example of a second light emitting element) that emits light according to the state of the first battery pack BP1, and a first battery state display portion 160 (an example of a battery state display portion). The first battery state display portion 160 includes a lens member 184 that transmits light from the front light emitting element 258 and light from the rear light emitting element 260, and a first display portion 180 and a second display portion 182 (an example of at least one display portion) that display the light transmitted through the lens member 184.

[0124] According to the above configuration, one lens member 184 is used for the front battery attachment portion 170 and the rear battery attachment portion 172, that is, for two battery attachment portions. Thereby, the number of parts of the electrical device 2 can be reduced.

[0125] Also, the front battery attachment portion 170 and the rear battery attachment portion 172 are arranged side by side in the front-rear direction (an example of a first direction). With respect to the front-rear direction, the center of the first battery state display portion 160 in the front-rear direction is arranged between the front battery attachment portion 170 and the rear battery attachment portion 172.

[0126] According to the above configuration, the first battery state display portion 160 can be easily aligned with the front battery attachment portion 170 and the rear battery attachment portion 172.

[0127] Also, the at least one display portion includes a first display portion 180 that displays the light from the front light emitting element 258 transmitted through the lens member 184, and a second display portion 182 that displays the light from the rear light emitting element 260 transmitted through the lens member 184.

[0128] According to the above configuration, the states of the two first battery packs BP1 can be easily grasped.

[0129] Further, the lens member 184 includes a first transmission portion 190 that transmits light from the front light-emitting element 258, and a second transmission portion 192 that transmits light from the rear light-emitting element 260.

[0130] According to the above configuration, the light from the front light-emitting element 258 and the light from the rear light-emitting element 260 can be easily separated within the lens member 184 as compared with a configuration in which one transmission portion transmits the light from the front light-emitting element 258 and the light from the rear light-emitting element 260.

[0131] The first transmission portion 190 faces forward (an example of the second direction), and includes a first inlet portion 198 through which the light from the front light-emitting element 258 enters, and an upward direction (an example of the third direction) that is inclined with respect to the forward direction and faces upward, and includes a first outlet portion 200 through which the light from the front light-emitting element 258 exits.

[0132] According to the above configuration, the light can be made to exit from the first outlet portion 200 in a direction different from the direction of the light entering the first inlet portion 198.

[0133] The upward direction is substantially orthogonal to the forward direction.

[0134] According to the above configuration, the degree of freedom in arranging the first display portion 180, the second display portion 182, and the front light-emitting element 258 can be increased.

[0135] The second transmission portion 192 faces the rear direction (an example of the fourth direction) opposite to the forward direction, and includes a second inlet portion 206 through which the light from the rear light-emitting element 260 enters, and an upward direction, and includes a second outlet portion 208 through which the light from the front light-emitting element 258 exits.

[0136] According to the above configuration, even when the direction of the light emitted by the front light-emitting element 258 and the direction of the light emitted by the rear light-emitting element 260 are different, the direction of the light from the front light-emitting element 258 exiting from the first outlet portion 200 is the same as the direction of the light from the rear light-emitting element 260 exiting from the second outlet portion 208. Thereby, the states of the two first battery packs BP1 can be easily grasped.

[0137] Further, the first transmission part 190 and the second transmission part 192 are separated from each other. The lens member 184 further includes a connection part 194 that connects the first transmission part 190 and the second transmission part 192.

[0138] According to the above configuration, in the configuration where the first transmission part 190 and the second transmission part 192 are in contact with each other, the light passing through the first transmission part 190 may enter the second transmission part 192, and the light passing through the second transmission part 192 may enter the first transmission part 190. According to the above configuration, the first transmission part 190 and the second transmission part 192 are separated from each other, and the connection part 194 connects the first transmission part 190 and the second transmission part 192. Therefore, it is possible to suppress the light passing through the first transmission part 190 from entering the second transmission part 192 and the light passing through the second transmission part 192 from entering the first transmission part 190. Further, the position of the second transmission part 192 with respect to the first transmission part 190 can be fixed by the connection part 194.

[0139] Further, the electric device 2 further includes a first base part 76 (an example of a base part) where the front battery mounting part 170 and the rear battery mounting part 172 are arranged. The connection part 194 includes a first right engaging part 222, a first left engaging part 224, a second right engaging part 234, a second left engaging part 236, and a second lower engaging part 240 (an example of an engaging part) that engage with the first base part 76.

[0140] According to the above configuration, since the first right engaging part 222, the first left engaging part 224, the second right engaging part 234, the second left engaging part 236, and the second lower engaging part 240 engage with the first base part 76, the first transmission part 190 and the second transmission part 192 can be formed into a shape suitable for light transmission.

[0141] Further, the connection part 194 includes a first connection part 214 that connects the first transmission part 190 and the second transmission part 192, and a second connection part 216 that is separated from the first connection part 214 and connects the first transmission part 190 and the second transmission part 192.

[0142] According to the above configuration, the rigidity of the lens member 184 can be increased as compared with a configuration in which the connecting portion 194 includes only one of the first connecting portion 214 and the second connecting portion 216. Thereby, the accuracy of positioning the second transmission portion 192 with respect to the first transmission portion 190 can be improved.

[0143] Further, the connecting portion 194 is separated from the first transmission portion 190 and the second transmission portion 192, and further includes an intermediate connecting portion 218 that connects the first connecting portion 214 and the second connecting portion 216.

[0144] According to the above configuration, while more suppressing the light passing through the first transmission portion 190 from entering the second transmission portion 192 and the light passing through the second transmission portion 192 from entering the first transmission portion 190, the rigidity of the lens member 184 can be further increased, so that the accuracy of positioning the second transmission portion 192 with respect to the first transmission portion 190 can be further improved.

[0145] Further, the intermediate connecting portion 218 includes a first intermediate connecting portion 244 that connects the first connecting portion 214 and the second connecting portion 216, and a second intermediate connecting portion 246 that is separated from the first intermediate connecting portion 244 and connects the first connecting portion 214 and the second connecting portion 216.

[0146] According to the above configuration, while more suppressing the light passing through the first transmission portion 190 from entering the second transmission portion 192 and the light passing through the second transmission portion 192 from entering the first transmission portion 190, the rigidity of the lens member 184 can be further increased, so that the accuracy of positioning the second transmission portion 192 with respect to the first transmission portion 190 can be further improved.

[0147] Further, an extension line of the first central axis AX1 (an example of a central axis) of the first transmission portion 190 is arranged offset with respect to the central position of the front light-emitting element 258.

[0148] According to the above configuration, the degree of freedom in arranging the front light-emitting element 258 and the first transmission portion 190 can be increased.

[0149] Further, the pre-emission element 258 includes a blue light-emitting portion 264 that emits blue light and a red light-emitting portion 266 that emits red light. The blue light-emitting portion 264 is disposed on the extension line of the first central axis AX1 of the first transmission portion 190.

[0150] Normally, blue light is less likely to be visually recognized by people than red light. According to the above configuration, compared with a configuration in which the blue light-emitting portion 264 that emits blue light, which is difficult for people to visually recognize, is not disposed on the extension line of the first central axis AX1 of the first transmission portion 190, it is possible to make blue easier to visually recognize.

[0151] In addition, the electric device 2 further includes 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 front battery attachment portion 170, and a front battery terminal substrate 174 (an example of a first battery terminal substrate) on which the first battery terminal 104 is mounted. The pre-emission element 258 is mounted on the front battery terminal substrate 174.

[0152] Normally, a dedicated substrate on which the pre-emission element 258 is mounted is used. According to the above configuration, the pre-emission element 258 is mounted on the front battery terminal substrate 174 on which the first battery terminal 104 is mounted. Therefore, a dedicated substrate on which the pre-emission element is mounted is not required. Thereby, the number of parts of the electric device 2 can be reduced.

[0153] In addition, the electric device 2 further includes a first battery terminal 104 (an example of a second battery terminal) that is electrically connected to the first battery pack BP1 when the first battery pack BP1 is attached to the rear battery attachment portion 172, and a rear battery terminal substrate 176 (an example of a second battery terminal substrate) on which the first battery terminal 104 is mounted. The lens member 184 is disposed between the front battery terminal substrate 174 and the rear battery terminal substrate 176.

[0154] According to the above configuration, the space between the front battery terminal substrate 174 and the rear battery terminal substrate 176 is utilized. Thereby, it is possible to suppress the electric device 2 from becoming larger in size.

[0155] Moreover, the front light-emitting element 258 is mounted on the mounting surface 174a of the front battery terminal substrate 174 and faces in the direction along the mounting surface 174a.

[0156] According to the above configuration, the lens member 184 is arranged in the direction along the mounting surface 174a with respect to the front light-emitting element 258. On the other hand, in the configuration where the front light-emitting element 258 emits light in a direction orthogonal to the mounting surface 174a, the lens member 184 is arranged in a direction orthogonal to the mounting surface 174a with respect to the front light-emitting element 258. According to the above configuration, it is possible to suppress the increase in size of the electric device 2 in the direction orthogonal to the mounting surface 174a as compared with the configuration in which the front light-emitting element 258 emits light in a direction orthogonal to the mounting surface 174a.

[0157] (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 (i.e., two) in the second embodiment is less than the number of at least one first battery mounting unit 52 (i.e., three) in the first embodiment. Further, 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.

[0158] 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 separated from the inner surface of the main body case 4. As a result, 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 arranged 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 accommodated in the electric device 2.

[0159] (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.

[0160] The shape of the second battery mounting portion 142 is the same as the shape of the second adapter mounting portion 152b of the adapter 152 in the first embodiment. For this reason, the mounting structure of the second battery mounting portion 142 for mounting the battery pack BP is the same as the mounting structure of the second adapter mounting portion 152b for mounting 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 mounted on the second battery mounting portion 142. On the other hand, the third battery pack BP3 (see FIG. 21) can be mounted on the second battery mounting portion 142. Therefore, the mounting structure of the second battery mounting portion 142 for mounting the third battery pack BP3 is different from the mounting structure of the first battery mounting portion 78 of the first tray unit 30 for mounting the first battery pack BP1.

[0161] (Modification) In the electric device 2 according to an 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.

[0162] 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 mounting portion 170 and the rear battery mounting portion 172.

[0163] 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.

[0164] In one embodiment, one first battery terminal board 56 may be provided for a plurality of first battery mounting portions 78. Also, one second battery terminal board 128 may be provided for a plurality of second battery mounting portions 142.

[0165] 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.

[0166] 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.

[0167] 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 for example, it may be a snap - fit type configuration.

[0168] In one embodiment, the first tray unit 30 may not include the first battery terminal unit 54 and the first battery terminal board 56. The second tray unit 32 may not include the second battery terminal unit 126 and the second battery terminal board 128.

[0169] 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.

[0170] 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 leftward, and the four second battery mounting portions 142 of the other second battery mounting unit 124 may face rightward. 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. Further, 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.

Explanation of Signs

[0171] 2: Electrical Equipment 4: Main Body Case 6: Lid 12: Accommodation Space 20: Tray Unit Mounting Portion 30: First Tray Unit 32: Second Tray Unit 34: Control Board 46: First Case Mounting Portion 48: First Board Mounting Portion 52: First Battery Mounting Unit 54: First Battery Terminal Unit 56: First Battery Terminal Board 78: First Battery Mounting Portion 104: First Battery Terminal 118: Second Case Mounting Portion 120: Second Board Mounting Portion 124: Second Battery Mounting Unit 126: Second Battery Terminal Unit 128: Second Battery Terminal Board 142: Second Battery Mounting Portion 152: Adapter 154: Second Battery Terminal 160: First battery status display section 162: Second battery status display section 170: Front battery mounting section 172: Rear battery mounting section 174: Front battery terminal board 174a: Mounting surface 176: Rear battery terminal board 176a: Mounting surface 180: First display section 182: Second display section 184: Lens member 190: First transmission section 192: Second transmission section 194: Connection section 198: First entrance section 200: First exit section 206: Second entrance section 208: Second exit section 214: First connection section 216: Second connection section 218: Intermediate connection section 222: First right engagement section 224: First left engagement section 228: Second upper connection section 230: Second lower connection section 234: Second right engagement section 236: Second left engagement section 240: Second lower engagement section 244: First intermediate connection section 246: Second intermediate connection section 256: Light-emitting element 258: Front light-emitting element 260: Rear light-emitting element 264: Blue light-emitting section 266: Red light-emitting section 268: Green light-emitting section 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. An electrical device, comprising: a first battery mounting portion to which a first battery is attached; a second battery mounting portion to which a second battery is attached; a first light emitting element that emits light according to the state of the first battery; a second light emitting element that emits light according to the state of the second battery; and a battery state display unit, wherein the battery state display unit includes a lens member that transmits the light from the first light emitting element and the light from the second light emitting element; and at least one display unit that displays the light transmitted through the lens member.

2. The first battery mounting portion and the second battery mounting portion are arranged side by side in a first direction, and with respect to the first direction, the center of the battery state display unit in the first direction is arranged between the first battery mounting portion and the second battery mounting portion. The electrical device according to Claim 1.

3. The at least one display unit includes a first display unit that displays the light from the first light emitting element transmitted through the lens member; and a second display unit that displays the light from the second light emitting element transmitted through the lens member. The electrical device according to Claim 1 or 2.

4. The lens member includes a first transmission portion that transmits the light from the first light emitting element; and a second transmission portion that transmits the light from the second light emitting element. The electrical device according to any one of Claims 1 to 3.

5. The first transmission portion faces a second direction and includes a first entrance portion through which the light from the first light emitting element enters; faces a third direction that is inclined with respect to the second direction and includes a first exit portion through which the light from the first light emitting element exits. The electrical device according to Claim 4.

6. The third direction is substantially orthogonal to the second direction. The electrical device according to Claim 5.

7. The second transmission portion faces a fourth direction opposite to the second direction and includes a second entrance portion through which the light from the second light emitting element enters; faces the third direction and includes a second exit portion through which the light from the second light emitting element exits. The electrical device according to Claim 5 or 6.

8. The first transmission portion and the second transmission portion are separated from each other, and the lens member further includes a connecting portion that connects the first transmission portion and the second transmission portion. The electrical device according to any one of Claims 4 to 7.

9. The base portion where the first battery mounting portion and the second battery mounting portion are arranged is further provided, The connection portion includes an engaging portion that engages with the base portion. The electrical device according to claim 8.

10. The connection portion is, A first connection portion that connects the first transmission portion and the second transmission portion, The electrical device according to claim 8 or 9, further including a second connection portion that is separated from the first connection portion and connects the first transmission portion and the second transmission portion.

11. The connection portion is separated from the first transmission portion and the second transmission portion, and the electrical device according to claim 10 further includes an intermediate connection portion that connects the first connection portion and the second connection portion.

12. The intermediate connection portion is, A first intermediate connection portion that connects the first connection portion and the second connection portion, The electrical device according to claim 11, further including a second intermediate connection portion that is separated from the first intermediate connection portion and connects the first connection portion and the second connection portion.

13. The extension line of the central axis of the first transmission portion is arranged offset with respect to the central position of the first light emitting element. The electrical device according to any one of claims 4 to 12.

14. The first light emitting element is, A blue light emitting portion that emits blue light, A red light emitting portion that emits red light, and is provided with, The electrical device according to claim 13, wherein the blue light emitting portion is arranged on the extension line of the central axis of the first transmission portion.

15. A first battery terminal that is electrically connected to the first battery when the first battery is attached to the first battery mounting portion, The electrical device according to any one of claims 1 to 14, further including a first battery terminal substrate on which the first battery terminal is mounted, and the first light emitting element is mounted on the first battery terminal substrate.

16. A second battery terminal that is electrically connected to the second battery when the second battery is attached to the second battery mounting portion, The electrical device according to claim 15, further including a second battery terminal substrate on which the second battery terminal is mounted, and the lens member is arranged between the first battery terminal substrate and the second battery terminal substrate.

17. The electrical device according to claim 15 or 16, wherein the first light emitting element is mounted on the mounting surface of the first battery terminal substrate and faces the direction along the mounting surface.

17. The electrical device according to claim 15 or 16, wherein the first light emitting element is mounted on the mounting surface of the first battery terminal substrate and faces the direction along the mounting surface.

Images