Electric tool

Abstract

To provide an electric tool of which the battery pack can be charged even if a dedicated charger is not present near.SOLUTION: An electric tool comprises an electric tool body and a battery pack. A tip end tool is attachable to and detachable from the electric tool body. The battery pack is attachable to and detachable from the electric tool body and stores power which is supplied to the electric tool body. The battery pack includes a first connection part to which a first charger is connectable and a second connection part to which a second charger which is dedicated to charging the battery pack is connectable. The first connection part consists of a receptacle conforming to the USB (Universal Serial Bus) Type-C standard.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power tool. [Background technology]

[0002] Japanese Patent Publication No. 2022-532701 (Patent Document 1) discloses a handheld power tool. This handheld power tool includes a drive motor and a battery pack. In this handheld power tool, the drive motor is driven by receiving power from the battery pack (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2022-532701 Summary of the Invention [Problem to be solved by the invention]

[0004] The battery pack disclosed in the above-mentioned Patent Document 1 is charged, for example, by removing the battery pack from the power tool and connecting the battery pack to a dedicated charger. That is, a dedicated charger is required to charge the battery pack. However, there may be cases where the battery pack needs to be charged when a dedicated charger is not available nearby.

[0005] The present invention has been made to solve such problems, and its object is to provide a power tool that allows the battery pack to be charged even if a dedicated charger is not located nearby. [Means for solving the problem]

[0006] The power tool according to the present invention includes a power tool body and a battery pack. A tool accessory can be attached or detached to or from the power tool body directly or indirectly. The battery pack is detachable from the power tool body and is configured to store power to be supplied to the power tool body. The battery pack includes a first connection portion to which a first charger can be connected and a second connection portion to which a second charger dedicated to charging the battery pack can be connected. The first connection portion is configured as a receptacle that complies with the USB (Universal Serial Bus) Type-C standard.

[0007] According to this power tool, the battery pack can be charged by using a charger (first charger) that complies with the USB Type-C standard, without using a second charger.

[0008] In the above-described power tool, the battery pack may further include an indicator configured to emit light while the battery pack is being charged.

[0009] According to this power tool, even if the first charger is not provided with an indicator, the user can know whether or not charging is in progress.

[0010] In the above-described power tool, the battery pack may further include a control unit configured to control charging of the battery pack, and when a first charger is connected to the first connection portion and a second charger is connected to the second connection portion, the control unit may control charging to be performed by the charger with the greater supply power between the first charger and the second charger.

[0011] This power tool allows the battery pack to be fully charged in a shorter time.

[0012] In the above-described power tool, the battery pack may include two overcharge prevention circuits connected in series with each other.

[0013] According to this power tool, even if the first charger does not include an overcharge prevention circuit, it is possible to more reliably prevent overcharging of the battery pack.

[0014] In the above-described power tool, the power tool body may include an attachment portion to which the tool tip can be attached directly or indirectly, and the direction in which the tool tip is attached directly or indirectly to the attachment portion may be opposite to the direction in which the plug of the cable conforming to the USB Type-C standard is connected to the first connection portion.

[0015] With this power tool, the direction in which the mounting portion faces and the direction in which the first connection portion faces are opposite to each other, so that it is possible to prevent foreign matter, such as chips cut by the cutting tool, from entering the first connection portion.

[0016] In the above-described power tool, the battery pack may further include a lid configured to cover the first connection portion.

[0017] According to this power tool, it is possible to more reliably prevent foreign matter from entering the first connecting portion.

[0018] In the above-mentioned power tool, when the first charger is connected to the first connection part, if the battery pack is not fully charged, the battery pack may be charged regardless of whether the battery pack is attached to the power tool body or not.

[0019] According to this power tool, the battery pack can be charged without removing it from the power tool body.

[0020] In the above-mentioned power tool, the battery pack may further include a control unit configured to control the supply of power to the power tool main body, and a rechargeable battery, and when the first charger is connected to the first connection part and the power tool main body is operated, the control unit may perform control so that the power supplied from the first charger is supplied to the power tool main body.

[0021] According to this power tool, even if the battery pack is not fully charged, the power tool body can be driven by the power supplied from the first charger.

[0022] In the above-mentioned power tool, if the power required by the power tool main body is greater than the power supplied from the first charger, the control unit may perform control so that both the power supplied from the first charger and the power supplied from the rechargeable battery are supplied to the power tool main body.

[0023] According to this power tool, even if the power required by the power tool body is greater than the power supplied from the first charger, sufficient power can be supplied to the power tool body.

[0024] In the above-described power tool, the battery pack may further include an indicator, which may be configured to emit light of a different color depending on whether only power supplied from the first charger is being supplied to the power tool body or whether both power supplied from the first charger and power supplied from the rechargeable battery are being supplied to the power tool body.

[0025] According to this power tool, the user can easily recognize the state of the load applied to the power tool body through the color of the light emitted by the indicator.

[0026] In the above-described power tool, the power tool body may include an attachment portion to which the tool tip can be attached directly or indirectly, and the direction in which the tool tip is attached directly or indirectly to the attachment portion may be opposite to the direction in which the plug of the cable conforming to the USB Type-C standard is connected to the first connection portion.

[0027] This power tool allows the cable to be relatively unobtrusive when using the power tool.

[0028] In the above-described power tool, the battery pack may further include a retaining mechanism configured to press the plug in a direction to connect the plug to the first connection portion.

[0029] According to this power tool, it is possible to prevent the plug from coming loose during use of the power tool. [Effects of the Invention]

[0030] According to the present invention, it is possible to provide a power tool that can charge a battery pack even if a dedicated charger is not present nearby. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 2 is a perspective view schematically showing the power tool to which the first attachment is attached. [Figure 2] FIG. 2 is a perspective view schematically showing the power tool to which the second attachment is attached. [Figure 3] FIG. 2 is a perspective view schematically showing the power tool to which the third attachment is attached. [Figure 4] FIG. 10 is a perspective view schematically showing the power tool to which the fourth attachment is attached. [Figure 5] FIG. 2 is a perspective view schematically showing a battery pack. [Figure 6] FIG. 2 is a diagram for explaining the electrical configuration of the battery pack. [Figure 7] 4 is a flowchart showing the procedure of a charging operation in the battery pack. [Figure 8] 5 is a flowchart showing a procedure for supplying power to the power tool body. [Figure 9] FIG. 4 is a diagram for explaining how power supplied from a first charger is used. [Figure 10] 10A and 10B are diagrams illustrating an example of a retaining mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0032] An embodiment according to one aspect of the present invention (hereinafter also referred to as "the present embodiment") will be described in detail below with reference to the drawings. Note that the same or corresponding parts in the drawings are designated by the same reference numerals, and their description will not be repeated. Furthermore, for ease of understanding, each drawing is drawn schematically with objects appropriately omitted or exaggerated.

[0033] [1. Configuration] <1-1. External appearance of power tools> FIG. 1 is a perspective view schematically illustrating a power tool 10 to which an attachment 300A is attached. Referring to FIG. 1, the attachment 300A is detachable from the power tool 10. A tool tip attachment portion 310 is provided at the front end of the attachment 300A. A tool tip such as a screwdriver bit is attached to the tool tip attachment portion 310. The power tool 10 includes, for example, a motor (not shown). The power tool 10 rotates the motor using electric power to rotate the screwdriver bit attached to the tool tip attachment portion 310.

[0034] The power tool 10 includes a power tool main body 200 and a battery pack 100. The power tool main body 200 includes an attachment mounting portion 210, a grip portion 220, a switch 230, and a battery mounting portion 240. The attachment mounting portion 210 is provided on the front end surface at the upper end of the power tool main body 200. That is, the attachment mounting portion 210 faces forward of the battery pack 100. For example, an attachment 300A is attached to the attachment mounting portion 210. That is, a tool tip such as a screwdriver bit is indirectly attached to the attachment mounting portion 210 via the attachment 300A. By attaching the attachment 300A to the attachment mounting portion 210, the rotational driving force of a motor (not shown) in the power tool main body 200 can be transmitted to the tool tip attached to the attachment 300A. By attaching the attachment 300A, the power tool 10 functions as an impact driver.

[0035] Fig. 2 is a perspective view schematically illustrating the power tool 10 to which the attachment 300B is attached. Referring to Fig. 2, the attachment 300B is an example of an attachment that can be attached to and detached from the power tool 10. A grinding member is provided at the front end of the attachment 300B. By attaching the attachment 300B, the power tool 10 functions as a sander.

[0036] Fig. 3 is a perspective view schematically illustrating the power tool 10 to which the attachment 300C is attached. Referring to Fig. 3, the attachment 300C is an example of an attachment that can be attached to and detached from the power tool 10. The attachment 300C has a blade that extends upward at its front end. By attaching the attachment 300C, the power tool 10 functions as a hedge trimmer for gardening.

[0037] Fig. 4 is a perspective view schematically illustrating the power tool 10 to which the attachment 300D is attached. Referring to Fig. 4, the attachment 300D is an example of an attachment that can be attached to and detached from the power tool 10. The attachment 300D has a blade extending upward and left and right at its front end. By attaching the attachment 300D, the power tool 10 functions as a hair clipper.

[0038] Referring again to FIG. 1 , the grip portion 220 is configured to be held by the hand of the user of the power tool 10. The switch 230 is configured to be pressed by the user's finger while the grip portion 220 is being held by the user's hand. When the switch 230 is pressed, for example, a tool tip attached to the attachment 300A is rotated. The battery attachment portion 240 is provided at the lower end of the power tool body 200. The battery pack 100 is attached to the battery attachment portion 240. The battery pack 100 is detachable from the battery attachment portion 240.

[0039] Fig. 5 is a perspective view schematically showing the battery pack 100. Referring to Fig. 5, the battery pack 100 is configured to store power to be supplied to the power tool main body 200. The battery pack 100 can be charged by each of a first charger 400 and a second charger 500, which will be described later.

[0040] The battery pack 100 includes a first connection portion 110 and a second connection portion 120. The first connection portion 110 is provided on a surface SF1 at the rear end of the battery pack 100. In other words, the first connection portion 110 faces rearward from the battery pack 100. The first connection portion 110 is configured as a receptacle that complies with the USB (Universal Serial Bus) Type-C standard. A first charger 400 can be connected to the first connection portion 110. The first charger 400 complies with the USB Type-C standard.

[0041] In the power tool 10, the direction in which the tool bit is indirectly attached to the attachment mounting portion 210 (see FIG. 1 ) is opposite to the direction in which the plug of the cable conforming to the USB Type-C standard is connected to the first connection portion 110. With the power tool 10, the direction in which the attachment mounting portion 210 faces and the direction in which the first connection portion 110 faces are opposite to each other, so that, for example, foreign matter such as chips produced by the tool bit can be prevented from entering the first connection portion 110.

[0042] The battery pack 100 further includes a lid portion 130. In FIG. 5, the first connection portion 110 is covered by the lid portion 130. The lid portion 130 can be opened and closed relative to the first connection portion 110. Covering the first connection portion 110 with the lid portion 130 can prevent foreign matter from entering the first connection portion 110.

[0043] The second connection portion 120 is provided at the upper end portion of the battery pack 100. A second charger 500 can be connected to the second connection portion 120. The second charger 500 is a charger dedicated to charging the battery pack 100. Because the battery pack 100 can be charged by both the first charger 400 and the second charger 500, the power tool 10 can charge the battery pack 100 by using a charger (first charger 400) that complies with the USB Type-C standard, without using the second charger 500.

[0044] The battery pack 100 further includes an indicator 140. The indicator 140 is configured as a light-emitting device such as an LED (Light Emitting Diode) and is provided on the surface SF1. The indicator 140 is configured to emit light while the battery pack 100 is being charged. According to the power tool 10, even if the first charger 400 is not provided with an indicator, the user can recognize whether the battery pack 100 is being charged or not.

[0045] The battery pack 100 further includes a slide switch 145 and an engaging portion 147. When the battery pack 100 is attached to the power tool body 200, the engaging portion 147 engages with an engaged portion (not shown) provided at the lower end of the power tool body 200. When the slide switch 145 is slid downward, the engaging portion 147 moves downward, and the engaged portion of the power tool body 200 and the engaging portion 147 are disengaged. This makes it possible to remove the battery pack 100 from the power tool body 200.

[0046] <1-2. Battery pack electrical configuration> 6 is a diagram illustrating the electrical configuration of battery pack 100. Referring to FIG. 6, battery pack 100 further includes terminals T1, T2, and T3, a charging circuit 150, a rechargeable battery 160, a control unit 170, and a temperature sensor 180.

[0047] The battery pack 100 is connected to the first charger 400 via a terminal T1. The terminal T1 connects a charging line CC, a signal line S, and a ground GND between the battery pack 100 and the first charger 400. The charging line CC supplies power to the rechargeable battery 160. The signal line S is used to send and receive control signals.

[0048] The terminal T2 is connected to the terminal T4 of the second charger 500, thereby connecting the charging line CC, the signal line S, and the ground GND between the battery pack 100 and the second charger 500.

[0049] The second charger 500 includes a terminal T4, a charging circuit 510, a switch 520, a socket 530, and an indicator 540. When the switch 520 is closed, the charging circuit 510 rectifies and changes the voltage of power supplied from a commercial power source via the socket 530, and supplies the rectified and voltage-changed power to the control unit 170. The charging circuit 510 includes an overcharge prevention circuit. The overcharge prevention circuit is configured to monitor the voltage of the rechargeable battery 160 and cut off the charging path of the rechargeable battery 160 when the voltage of the rechargeable battery 160 exceeds a predetermined voltage. Various known overcharge prevention circuits can be used as the overcharge prevention circuit included in the charging circuit 510. The indicator 540 is configured, for example, by a light-emitting device such as an LED. The indicator 540 is configured to emit light while the battery pack 100 is being charged.

[0050] The terminal T3 connects the power supply line PW, the signal line S, and the ground GND between the battery pack 100 and the power tool body 200. The power supply line PW supplies power to the power tool body 200.

[0051] The charging circuit 150 rectifies and changes the voltage of the power supplied from the first charger 400, and supplies the rectified and voltage-changed power to the control unit 170. The charging circuit 150 includes an overcharge prevention circuit. The overcharge prevention circuit is configured to monitor the voltage of the rechargeable battery 160 and cut off the charging path of the rechargeable battery 160 when the voltage of the rechargeable battery 160 exceeds a predetermined voltage. Various known overcharge prevention circuits can be used as the overcharge prevention circuit included in the charging circuit 150. The rechargeable battery 160 is, for example, a secondary battery such as a lithium-ion battery. The rechargeable battery 160 stores the power supplied to the power tool main body 200.

[0052] The control unit 170 includes a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), etc., and is configured to control each component in accordance with information processing. The control unit 170 supplies power input from the charging circuit 150 or the charging circuit 510 to the rechargeable battery 160. The temperature sensor 180 detects the temperature of the rechargeable battery 160. The control unit 170 controls the charging power of the rechargeable battery 160 based on the charge amount and temperature of the rechargeable battery 160. Information indicating the charge amount of the rechargeable battery 160 (charge amount information) is acquired via the signal line S, and information indicating the temperature of the rechargeable battery 160 (temperature information) is acquired from the temperature sensor 180. The control unit 170 controls the charging circuit 150 or the charging circuit 510 based on the charge amount and temperature of the rechargeable battery 160 so that the amount of charging power of the rechargeable battery 160 is appropriate.

[0053] The control unit 170 includes an overcharge prevention circuit. The overcharge prevention circuit is configured to monitor the voltage of the rechargeable battery 160 and cut off the charging path of the rechargeable battery 160 when the voltage of the rechargeable battery 160 exceeds a predetermined voltage. Various known overcharge prevention circuits can be used as the overcharge prevention circuit included in the control unit 170. The overcharge prevention circuit included in the control unit 170 is connected in series with the overcharge prevention circuit included in the charging circuit 150 and the overcharge prevention circuit included in the charging circuit 510. According to the power tool 10, even if the first charger 400 does not include an overcharge prevention circuit, the overcharge prevention circuit included in the control unit 170 and the overcharge prevention circuit included in the charging circuit 150 are connected in series, so that overcharging of the rechargeable battery 160 can be more reliably prevented.

[0054] In the power tool 10, when the first charger 400 is connected to the first connection part 110 and the rechargeable battery 160 is not fully charged, the rechargeable battery 160 is charged regardless of whether the battery pack 100 is attached to the power tool main body 200. According to the power tool 10, the battery pack 100 can be charged without removing the battery pack 100 from the power tool main body 200.

[0055] In the power tool 10, when the battery pack 100 is connected to the power tool main body 200 and the first charger 400 is connected to the first connection part 110, the control part 170 controls the power tool main body 200 so that power supplied from the first charger 400 is supplied to the power tool main body 200 when the power tool main body 200 is driven. According to the power tool 10, even if charging of the battery pack 100 is not completed, the power tool main body 200 can be driven by power supplied from the first charger 400.

[0056] [2. Operation] 7 is a flowchart showing the procedure of the charging operation in the battery pack 100. The process shown in this flowchart is repeatedly executed by the control unit 170 at a predetermined interval.

[0057] 7, the control unit 170 determines whether or not the terminal T4 of the second charger 500 is connected to the terminal T2 (step S100). If it is determined that the terminal T4 of the second charger 500 is connected to the terminal T2 (YES in step S100), the control unit 170 controls the charging circuit 510 so that the rechargeable battery 160 is charged by the power supplied from the second charger 500 (step S110).

[0058] On the other hand, if it is determined that terminal T4 of the second charger 500 is not connected to terminal T2 (NO in step S100), the control unit 170 determines whether the plug of the first charger 400 is connected to terminal T1 (step S120). If it is determined that the plug of the first charger 400 is connected to terminal T1 (YES in step S120), the control unit 170 controls the charging circuit 150 so that the rechargeable battery 160 is charged by power supplied from the first charger 400 (step S130). On the other hand, if it is determined that the plug of the first charger 400 is not connected to terminal T1 (NO in step S120), the control unit 170 executes the process of step S100 again.

[0059] In this embodiment, the power supplied by the second charger 500 is greater than the power supplied by the first charger 400. That is, in the power tool 10, when the first charger 400 is connected to the first connection unit 110 and the second charger 500 is connected to the second connection unit 120, the control unit 170 controls the power tool 10 so that charging is performed by the charger (second charger 500) that supplies the greater power between the first charger 400 and the second charger 500. Therefore, the power tool 10 can complete charging of the battery pack 100 in a shorter time.

[0060] 8 is a flowchart showing the procedure of the power supply operation to the power tool body 200. The process shown in this flowchart is repeatedly executed by the control unit 170 at a predetermined interval when the power tool body 200 is driven.

[0061] 8, control unit 170 determines whether the plug of first charger 400 is connected to terminal T1 (step S200). If it is determined that the plug of first charger 400 is not connected to terminal T1 (NO in step S200), control unit 170 performs control so that the power stored in rechargeable battery 160 of battery pack 100 is supplied to power tool main body 200, and controls indicator 140 to emit light of a first color (step S210).

[0062] On the other hand, if it is determined that the plug of the first charger 400 is connected to the terminal T1 (YES in step S200), the control unit 170 determines whether the power supplied by the first charger 400 is greater than the required power (required power) (step S220). If it is determined that the power supplied by the first charger 400 is greater than the required power (YES in step S220), the control unit 170 controls the power supplied by the first charger 400 to be supplied to the power tool main body 200, and controls the indicator 140 to emit light of a second color (step S230).

[0063] On the other hand, if it is determined that the power supplied by the first charger 400 is equal to or less than the required power (NO in step S220), the control unit 170 controls the power stored in the rechargeable battery 160 of the battery pack 100 and the power supplied by the first charger 400 to be both supplied to the power tool body 200, and controls the indicator 140 to emit light of a third color (step S240). Note that the first color, the second color, and the third color are different from one another.

[0064] FIG. 9 is a diagram for explaining how the power supplied from the first charger 400 is used. Referring to FIG. 9, the horizontal axis represents time and the vertical axis represents power. In this example, a constant power P1 is supplied from the first charger 400 to the battery pack 100. An area AR1 indicates the amount of power supplied from the first charger 400. Areas AR2 and AR3 indicate the amount of required power.

[0065] At time t1-t2, the power supplied from the first charger 400 is greater than the required power, so only the power supplied from the first charger 400 is supplied to the power tool main body 200. The surplus power is used to charge the rechargeable battery 160. On the other hand, at time t3-t4, the power supplied from the first charger 400 is less than the required power, so both the power supplied from the first charger 400 and the power stored in the rechargeable battery 160 are supplied to the power tool main body 200.

[0066] In this way, in the power tool 10, when the power required by the power tool main body 200 is greater than the power supplied from the first charger 400, the control unit 170 controls the power tool main body 200 so that both the power supplied from the first charger 400 and the power supplied from the rechargeable battery 160 are supplied to the power tool main body 200. Therefore, according to the power tool 10, even when the power required by the power tool main body 200 is greater than the power supplied from the first charger 400, sufficient power can be supplied to the first charger 400.

[0067] In addition, in the power tool 10, the indicator 140 of the battery pack 100 is configured to emit light of different colors depending on whether only power supplied from the first charger 400 is being supplied to the power tool main body 200 or whether both power supplied from the first charger 400 and power supplied from the rechargeable battery 160 are being supplied to the power tool main body 200. According to the power tool 10, the color of the light emitted by the indicator 140 allows the user to easily recognize the state of the load on the power tool main body 200.

[0068] As described above, the first connector 110 faces rearward in the battery pack 100. Therefore, according to the power tool 10, when the power tool 10 is used with the plug of the cable of the first charger 400 connected to the first connector 110, the cable can be kept relatively out of the way.

[0069] [3. Features] As described above, according to the power tool 10, the battery pack 100 can be charged by using a charger (first charger 400) that complies with the USB Type-C standard, without using the second charger 500.

[0070] 4. Other Embodiments The concept of the above embodiment is not limited to the embodiment described above. Hereinafter, examples of other embodiments to which the concept of the above embodiment can be applied will be described.

[0071] <4-1> In the above embodiment, the tool bit is attached to the power tool body 200 via the attachment 300A. However, the method of attaching the tool bit to the power tool body 200 is not limited to this. For example, the tool bit may be attached directly to the power tool body 200 without using the attachment 300A.

[0072] <4-2> In the above embodiment, a mechanism (a mechanism for preventing the plug connected to the first connecting portion 110 from coming off may be provided separately.

[0073] FIG. 10 is a diagram illustrating an example of a retaining mechanism. Referring to FIG. 10, the battery pack 100 may further include a retaining mechanism 190 that is rotatable about an axis AX1 (see FIG. 5), for example. The retaining mechanism 190 has a slit (not shown) formed therein through which the cable 410 of the first charger 400 passes. With the cable 410 passing through the slit, the retaining mechanism 190 engages with the underside of the battery pack 100, causing the retaining mechanism 190 to press the plug 420 forward (in the direction of connecting the plug 420 to the battery pack 100). This can prevent the plug 420 from coming loose when the power tool 10 is in use.

[0074] The above describes exemplary embodiments of the present invention. That is, the detailed description and the accompanying drawings are disclosed for the purpose of illustrative explanation. Therefore, some of the components described in the detailed description and the accompanying drawings may be non-essential components for solving the problems. Therefore, just because these non-essential components are described in the detailed description and the accompanying drawings, it should not be immediately recognized that these non-essential components are essential.

[0075] Furthermore, the above-described embodiments are merely illustrative of the present invention in all respects. Various improvements and modifications to the above-described embodiments are possible within the scope of the present invention. For example, at least a portion of the configuration of any of the embodiments may be combined with at least a portion of the configuration of any of the other embodiments. In other words, when implementing the present invention, specific configurations can be appropriately adopted depending on the embodiment. [Explanation of symbols]

[0076] 10 power tool, 100 battery pack, 110 first connection portion, 120 second connection portion, 130 cover portion, 140, 540 indicator, 145 slide switch, 147 engagement portion, 150, 510 charging circuit, 160 rechargeable battery, 170 control portion, 180 temperature sensor, 190 retention mechanism, 200 power tool body, 210 attachment mounting portion, 220 grip portion, 230 switch, 240 battery mounting portion, 300 attachment, 310 tip tool mounting portion, 400 first charger, 410 cable, 420 plug, 500 second charger, 520 switch, 530 outlet, AR1, AR2, AR3 area, AX1 axis, CC charging line, GND ground, PW power supply line, S signal line, SF1 surface, T1, T2, T3, T4 Terminal.

Claims

1. an electric tool body to which a tool tip can be directly or indirectly attached and detached; a battery pack that is detachable from the power tool body and configured to store power to be supplied to the power tool body, the battery pack includes a first connection portion to which a first charger can be connected and a second connection portion to which a second charger dedicated to charging the battery pack can be connected, The power tool, wherein the first connection portion is configured by a receptacle that complies with the USB (Universal Serial Bus) Type-C standard.

2. The power tool of claim 1 , wherein the battery pack further includes an indicator configured to illuminate while the battery pack is charging.

3. the battery pack further includes a controller configured to control charging of the battery pack; 3. The power tool according to claim 1, wherein when the first charger is connected to the first connection portion and the second charger is connected to the second connection portion, the control unit controls the charging so that the charging is performed by the charger that supplies the greater power between the first charger and the second charger.

4. The power tool according to claim 1 or 2, wherein the battery pack includes two overcharge protection circuits connected in series with each other.

5. the power tool body includes an attachment portion to which the tool bit can be directly or indirectly attached, 3. The power tool according to claim 1, wherein the direction in which the tool bit is directly or indirectly attached to the attachment portion and the direction in which a plug of a cable conforming to the USB Type-C standard is connected to the first connection portion are opposite to each other.

6. The power tool according to claim 5 , wherein the battery pack further includes a lid configured to cover the first connection portion.

7. 3. The power tool according to claim 1, wherein when the first charger is connected to the first connection portion and the battery pack is not fully charged, the battery pack is charged regardless of whether the battery pack is attached to the power tool body.

8. the battery pack further includes a controller configured to control power supply to the power tool body and a rechargeable battery; The power tool according to claim 1, wherein when the first charger is connected to the first connection portion and the power tool main body is driven, the control unit controls the power supplied from the first charger to be supplied to the power tool main body.

9. The power tool according to claim 8, wherein, when the power required by the power tool main body is greater than the power supplied from the first charger, the control unit controls so that both the power supplied from the first charger and the power supplied from the rechargeable battery are supplied to the power tool main body.

10. the battery pack further includes an indicator; The power tool according to claim 9, wherein the indicator is configured to emit light of a different color when only power supplied from the first charger is supplied to the power tool body and when both power supplied from the first charger and power supplied from the rechargeable battery are supplied to the power tool body.

11. the power tool body includes an attachment portion to which the tool bit can be directly or indirectly attached, The power tool according to any one of claims 8 to 10, wherein a direction in which the tool bit is directly or indirectly attached to the attachment portion and a direction in which a plug of a cable conforming to the USB Type-C standard is connected to the first connection portion are opposite to each other.

12. The power tool according to claim 11 , wherein the battery pack further includes a retaining mechanism configured to press the plug in a direction to connect the plug to the first connection portion.

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