Charging system, charging device, power tool, and battery pack

Abstract

To reduce a time and effort required for charging a secondary battery of an electric tool.SOLUTION: A charging system 1 includes a power supply terminal TB1, a housing 3, a holder 4, and a charging circuit 5. The power supply terminal TB1 provided in the housing 3 is connectable to a power receiving terminal TB2 of a power tool 7. The holder 4 includes a tubular portion 41 with a circular or arc-shaped cross section and a guide portion 42. The tubular portion 41 is positioned such that its central axis intersects the horizontal direction, allowing the head 71 of the power tool 7 to be inserted into it from its upper end. With the head 71 inserted into the tubular portion 41, the holder 4 is positioned at a position where the power supply terminal TB1 and the power receiving terminal TB2 can be connected. While the head 71 is being inserted into the tubular portion 41, at least one of the tool tip 9 attached to the power tool 7 and the head 71 moves while contacting the guide portion 42, thereby moving the power receiving terminal TB2 to a position where it can be connected to the power supply terminal TB1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a charging system, a charging device, a power tool, and a battery pack. More particularly, the present disclosure relates to a charging system, a charging device, a power tool, and a battery pack that charge a battery pack that is a power source for a portable power tool. [Background technology]

[0002] Patent Document 1 discloses a charging system for a power tool.

[0003] The power tool includes a tool body and a battery pack that is detachable from the tool body. The power tool performs tasks such as screw tightening by rotating an electric motor with power supplied from the battery pack.

[0004] The charging system includes a charger main body, which charges the battery pack when the battery pack is removed from the power tool and attached to the charger main body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-115691 Summary of the Invention [Problem to be solved by the invention]

[0006] In the charging system described in Patent Document 1, the battery pack is removed from the power tool body and attached to the charger body, and then the battery pack is charged. Then, when charging of the battery pack is completed, the battery pack is removed from the charger body and attached to the power tool body, and work using the power tool is performed. As such, when charging the battery pack of the power tool, it is necessary to take the time to attach and detach the battery pack to and from the power tool body, which has been a problem in that it is time-consuming to charge the battery pack (secondary battery) of the power tool.

[0007] An object of the present disclosure is to provide a charging system, a charging device, a power tool, and a battery pack that can reduce the effort required when charging a secondary battery of a power tool. [Means for solving the problem]

[0008] A charging system according to one aspect of the present disclosure includes a power supply terminal, a housing, a holder, and a charging circuit. The power supply terminal is connectable to a power receiving terminal connected to a secondary battery of a portable power tool. The power tool has a cylindrical head that houses a motor and a grip for a user to hold, with the grip being disposed between the head and a battery housing that houses a secondary battery. The power supply terminal is disposed on the housing. The holder is capable of holding the head of the power tool. With the power supply terminal connected to the power receiving terminal, the charging circuit is capable of supplying charging current to the secondary battery via the power supply terminal and the power receiving terminal using power supplied from an external power source. The holder includes a cylindrical portion having a circular or arc-shaped cross section and a guide portion. The cylindrical portion is disposed so that its central axis intersects the horizontal direction, and the head can be inserted from its upper end. The holder is disposed at a position where the power supply terminal and the power receiving terminal can be connected when the head is inserted into the cylindrical portion. While the head is being inserted into the cylindrical portion, at least one of the tool tip attached to the power tool and the head moves while contacting the guide portion, thereby moving the power receiving terminal to a position where it can be connected to the power supply terminal.

[0009] A charging device according to an aspect of the present disclosure is the charging device included in the charging system, and includes the power supply terminal unit, the housing, the holder unit, and the charging circuit unit.

[0010] An electric power tool according to one aspect of the present disclosure is the electric power tool provided with the charging system.

[0011] A battery pack according to one aspect of the present disclosure is a battery pack that is detachable from a power tool provided in the charging system. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to reduce the effort required to charge a secondary battery of a power tool. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a partial cross-sectional view showing a state in which a power tool is being held by a charging device included in a charging system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a schematic block diagram of the charging system. [Figure 3] FIG. 3 is a side view showing a state before the power tool is held by the charging device. [Figure 4] FIG. 4 is a perspective view showing a state in which the power tool is being held by the charging device. [Figure 5] FIG. 5 is a partial cross-sectional view showing a state in which an electric tool is held in the charging device. [Figure 6] FIG. 6 is a perspective view showing a state in which an electric tool is held in the charging device. [Figure 7] FIG. 7 is a rear view of the charging device holding the power tool. [Figure 8] FIG. 8 is a front view of the charging device holding the power tool. [Figure 9] FIG. 9 is a perspective view of the external appearance of the power tool. [Figure 10] FIG. 10 is a front view of the charging device. [Figure 11] FIG. 11 is a view of the charging device as viewed from the connecting side of the power tool. [Figure 12] FIG. 12 is a side view showing a state in which a power tool is held by a charging device included in a charging system according to the first modification. [Figure 13]FIG. 13 is a side view showing a state in which a power tool is held by a charging device included in a charging system according to the second modification. [Figure 14] FIG. 14 is a partial cross-sectional view showing a state in which a power tool is held by a charging device included in a charging system according to the third modification. [Figure 15] FIG. 15 is a perspective view of the appearance of a charging device included in a charging system according to the fourth modification. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a charging system according to an embodiment, a charging device and a power tool provided in the charging system, and a battery pack provided in the power tool will be described in detail with reference to the drawings. However, each diagram described in the following embodiments is a schematic diagram, and the dimensional ratios of the sizes of the components do not necessarily reflect the actual dimensional ratios. Furthermore, the configurations described in the following embodiments are merely examples of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0015] (Embodiment) (1) Overview The charging system 1 includes a power supply terminal unit TB1, a housing 3, a holder unit 4, and a charging circuit unit 5, as shown in FIGS.

[0016] The power supply terminal TB1 can be connected to a power receiving terminal TB2 that is connected to a secondary battery B1 of the portable power tool 7. The power tool 7 has a cylindrical head 71 that houses a motor 77 and a grip 73 for the operator to hold, with the grip 73 being provided between the head and a battery housing 72 that houses the secondary battery B1.

[0017] The housing 3 is provided with a power supply terminal section TB1.

[0018] The holder portion 4 is capable of holding a head portion 71 of the power tool 7 .

[0019] When the power supply terminal TB1 is connected to the power receiving terminal TB2, the charging circuit unit 5 can supply a charging current to the secondary battery B1 via the power supply terminal TB1 and the power receiving terminal TB2 using power supplied from the external power source PS1.

[0020] The holder part 4 has a cylindrical part 41 with a circular or arc-shaped cross section, and a guide part 42. The cylindrical part 41 is arranged so that the central axis direction intersects with the horizontal direction, and the head part 71 can be inserted from the upper end part.

[0021] With the head portion 71 inserted into the cylindrical portion 41, the holder portion 4 is disposed at a position where the power supply terminal portion TB1 and the power receiving terminal portion TB2 can be connected.

[0022] Furthermore, while the head portion 71 is being inserted into the tubular portion 41, at least one of the tip tool 9 attached to the power tool 7 and the head portion 71 moves while contacting the guide portion 42, thereby moving the receiving terminal portion TB2 to a position where it can be connected to the supply terminal portion TB1.

[0023] Here, "the cross section of the tubular portion 41 is circular or arc-shaped" means that the shape of the tubular portion 41 in a cross section perpendicular to the central axis of the tubular portion 41 is circular or arc-shaped. Also, "arranging the tubular portion 41 so that the central axis direction of the tubular portion 41 intersects the horizontal direction" means that the tubular portion 41 is arranged at an inclination such that, when the head portion 71 is inserted into the tubular portion 41, the head portion 71 can move to the back of the tubular portion 41 due to the weight of the power tool 7. For example, the angle between the central axis direction of the tubular portion 41 and the horizontal direction is preferably 30 degrees or more and 90 degrees or less.

[0024] When inserting the head 71 of the power tool 7 into the tube 41, at least one of the tool bit 9 and the head 71 attached to the power tool 7 moves while contacting the guide 42, thereby moving the power receiving terminal TB2 to a position where it can be connected to the power feeding terminal TB1. That is, while inserting the head 71 of the power tool 7 into the tube 41 of the holder 4, at least one of the tool bit 9 and the head 71 moves while contacting the guide 42, thereby moving the power tool 7 to a position where it can be connected to the power feeding terminal TB1. Therefore, when the power tool 7 is placed on the holder 4 attached to the housing 3, the power receiving terminal TB2 connects to the power feeding terminal TB1, allowing the charging circuit 5 to charge the secondary battery B1 of the power tool 7, thereby reducing the effort required to charge the secondary battery B1 of the power tool 7. Furthermore, since the central axis of the tubular portion 41 is arranged to intersect with the horizontal direction, when the user releases the grip portion 73 with the head portion 71 somewhat inserted into the tubular portion 41, the power tool 7 moves by its own weight to the position where the power receiving terminal TB2 connects to the power supply terminal TB1. Therefore, the user does not need to move the power tool 7 to the position where the power receiving terminal TB2 connects to the power supply terminal TB1, which reduces the effort required to charge the secondary battery B1 of the power tool 7.

[0025] (2) Details A charging system 1 according to this embodiment will be described below with reference to FIGS.

[0026] The charging system 1 of this embodiment is used to charge the secondary battery B1 of the power tool 7. The power tool 7 is used, for example, on a production line in an automobile assembly plant or the like.

[0027] The charging system 1 includes a charging device 2 for charging a secondary battery B1 of a power tool 7. The charging system 1 may include the power tool 7.

[0028] The configuration of the power tool 7 and the charging device 2 will be described below with reference to the drawings. In the following description, the X-axis direction in FIG. 4 and other figures is defined as the left-right direction, the Y-axis direction as the front-rear direction (depth direction), and the Z-axis direction as the up-down direction. Furthermore, the positive direction of the X-axis direction is defined as the right side, the positive direction of the Y-axis direction as the front side, and the positive direction of the Z-axis direction as the up side. However, these directions are merely examples and are not intended to limit the directions in which the power tool 7 and the charging device 2 are used. Furthermore, the arrows indicating the various directions in the drawings are merely shown for explanatory purposes and do not have any substance.

[0029] (2.1) Power tools The power tool 7 of this embodiment will be described with reference to FIGS. 1, 2 and 9. FIG.

[0030] As described above, the power tool 7 includes the motor 77, the secondary battery B1, and the power receiving terminal TB2. The power tool 7 also includes an operating unit 74, a control unit 75, and a drive circuit .

[0031] The power tool 7 further includes a tool body 70 that houses a motor 77, a secondary battery B1, a power receiving terminal TB2, an operation unit 74, a control unit 75, a drive circuit 76, and the like.

[0032] The power tool 7 is a portable tool such as an impact driver that can be held by a user (operator) in one hand.

[0033] The tool body 70 of the power tool 7 has a cylindrical head portion 71 , a battery housing portion 72 , and a grip portion 73 .

[0034] The head unit 71 houses at least the motor 77. The head unit 71 also houses a transmission mechanism that transmits the rotational torque of the motor 77 to the output shaft 771. The transmission mechanism includes an impact mechanism that generates an impact force based on the power of the motor 77.

[0035] An output shaft 771 is provided at one end of the cylindrical head portion 71 in the direction of the central axis (the direction indicated by arrow A1 in FIG. 3 ), to which impact force is transmitted via an impact mechanism. A socket portion 92 of the tool bit 9 can be attached to the output shaft 771. The tip portion of the output shaft 771 is formed in a rectangular column shape, and the socket portion 92 has a rectangular hole into which the tip portion of the output shaft 771 fits. The tool bit 9 is attached to the output shaft 771 by fitting the tip portion of the output shaft 771 into the socket portion 92. The tool bit 9 is provided with a box wrench socket 91 for tightening, for example, a hexagonal bolt. When the output shaft 771 rotates in response to the rotation of the motor 77, the tool bit 9 attached to the output shaft 771 rotates. For example, when the motor 77 is rotated with a hexagonal bolt attached to the box wrench socket 91 placed against a bolt hole in an object, the output shaft 771 rotates, and the hexagonal bolt attached to the box wrench socket 91 is tightened into the bolt hole in the object. When the tightening torque increases as the hex bolt is tightened and exceeds a predetermined threshold, the impact mechanism generates an impact force, which is transmitted to the hex bolt, and the hex bolt is tightened into the bolt hole of the target object at the desired torque value.

[0036] The grip portion 73 protrudes from a part of the outer peripheral surface of the head portion 71 in a direction perpendicular to the central axis direction of the head portion 71. The grip portion 73 is a portion that is held by a user of the power tool 7. A user of the power tool 7 holds the grip portion 73 to perform work using the power tool 7. A first end of the grip portion 73 in the longitudinal direction is connected to the head portion 71, and a second end of the grip portion 73 in the longitudinal direction is connected to the battery housing portion 72. The grip portion 73 houses a control unit 75 and the like.

[0037] The battery accommodating section 72 is formed in a rectangular parallelepiped shape. The battery accommodating section 72 is connected to the second end of the grip section 73. In other words, the head section 71 and the battery accommodating section 72 are connected via the grip section 73. In this embodiment, the battery accommodating section 72 is provided integrally with the head section 71 and the grip section 73. A secondary battery B1 is accommodated inside the battery accommodating section 72.

[0038] The secondary battery B1 is, for example, a lithium-ion battery. More specifically, the secondary battery B1 is an all-solid-state battery, which is a type of lithium-ion battery. Because the secondary battery B1 is an all-solid-state battery that can be charged quickly, the secondary battery B1 can be charged in a short time by placing the power tool 7 on the charging device 2 between operations. This allows the battery capacity of the secondary battery B1 to be reduced, and the power tool 7 to be made smaller.

[0039] The grip portion 73 is provided with an operation portion 74 for adjusting the amount of rotation of the output shaft 771. The operation portion 74 includes, for example, a trigger switch having an operation button arranged on the grip portion 73. When the user pulls in the operation button arranged on the grip portion 73, the trigger switch outputs an operation signal to the control portion 75, the magnitude of which corresponds to the amount of pulling of the operation button.

[0040] The drive circuit 76 rotates the motor 77 at a rotation speed according to a control command from the control unit 75, for example.

[0041] The control unit 75 includes, for example, a computer system having one or more processors and a memory. At least some of the functions of the control unit 75 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunications line such as the Internet, or may be provided by being recorded on a non-transitory recording medium such as a memory card.

[0042] The control unit 75 controls the drive circuit 76 in response to an operation signal input from the operation unit 74, for example, to rotate the motor 77 at a desired rotation speed and rotate the tool bit 9 at a rotation speed corresponding to the rotation speed of the motor 77. The power tool 7 may be provided with a torque sensor that detects the torque applied to the output shaft 771, and the control unit 75 may control the rotation of the motor 77 based on the detection result of the torque sensor.

[0043] The power tool 7 also has a power receiving terminal TB2 (see FIG. 9) connected to the secondary battery B1. The power receiving terminal TB2 is located on a side surface of the battery holder 72 that faces the protrusion 32 of the housing 3 when the power tool 2 is placed on the charging device 2. The power receiving terminal TB2 has two rod-shaped terminals 81 that are connected to the positive and negative electrodes of the secondary battery B1, respectively. A recess 80 that is rectangular in side view is provided on the side surface of the battery holder 72, and the two rod-shaped terminals 81 protrude from the bottom surface of the recess 80. A plate member 82 made of a magnetic material is located between the two rod-shaped terminals 81.

[0044] (2.2) Charging device A charging device 2 of this embodiment will be described with reference to FIGS. 1 to 8 and 10 to 11. FIG.

[0045] The charging device 2 includes the charging circuit unit 5 and power supply terminal unit TB1 described above. The charging device 2 also includes a housing 3 that houses the charging circuit unit 5 and power supply terminal unit TB1, and a holder unit 4. In other words, the charging device 2 includes the power supply terminal unit TB1, the housing 3, the holder unit 4, and the charging circuit unit 5.

[0046] The charging device 2 is used in a state where it is attached to, for example, a work platform or a work bench on which bolts and the like used for fastening work are placed.

[0047] The housing 3 is a molded product made of synthetic resin. The housing 3 is formed to have a substantially L-shaped shape in a side view. A protrusion 31 having a triangular shape in a side view is provided in a portion closer to the front of the housing 3. A protrusion 32 having a trapezoidal shape in a side view is provided in a portion closer to the rear of the housing 3.

[0048] Housing 3 houses charging circuit unit 5 (see FIG. 5). An electric wire CB1 connected to charging circuit unit 5 extends from housing 3. By connecting an attachment plug PG1 provided at the end of electric wire CB1 to a power outlet, power is supplied to charging circuit unit 5 from an external power source PS1 such as a commercial AC power supply. Note that illustration of electric wire CB1 is omitted in FIGS. 1, 3 and 4, 6 to 8, 10 and 11, etc.

[0049] The charging circuit 5 converts AC voltage supplied from an external power source PS1, such as a commercial AC power source, into DC voltage and outputs it to the power supply terminal TB1. When the power supply terminal TB1 is connected to the power receiving terminal TB2 of the power tool 7, the charging circuit 5 applies DC voltage to the secondary battery B1, and a charging current is supplied to the secondary battery B1, thereby charging the secondary battery B1.

[0050] The external power supply PS1 may be a portable power supply that outputs DC voltage. In this case, the charging circuit unit 5 may include a DC-DC converter that converts the DC voltage supplied from the external power supply PS1 into a DC voltage of a predetermined voltage value and outputs it to the power receiving terminal unit TB2. The charging circuit unit 5 may convert the DC voltage supplied from the external power supply PS1 into a DC voltage of a predetermined voltage value and output it to the power receiving terminal unit TB2.

[0051] A power supply terminal TB1 is provided on the upper surface of the protrusion 32 of the housing 3 (see FIGS. 10 and 11). The power supply terminal TB1 has a rectangular parallelepiped plug body 85 that can be inserted into the recess 80 of the power tool 7. Two electrodes 86 are provided on the front surface of the plug body 85, and are connected to the two rod-shaped terminals 81 of the power receiving terminal TB2, respectively. A holding portion 87, which includes a magnet or the like for magnetically attracting the plate member 82, is disposed between the two electrodes 86. The holding portion 87 magnetically maintains the connection between the power receiving terminal TB2 and the power supply terminal TB1. Therefore, even if an external force is applied to the power tool 7 when placed on the charging device 2, such as when a person or object comes into contact with the power tool 7, the power receiving terminal TB2 is unlikely to come off the power supply terminal TB1, and the charging circuit unit 5 can continuously charge the secondary battery B1. The holding portion 87 is not limited to using magnetic force to hold the power receiving terminal portion TB2 and the power supply terminal portion TB1 in a connected state, and the holding method can be changed as appropriate as long as it is a method that allows for easy attachment and detachment, such as a snap fit.

[0052] Grooves 33 extending forward from the rear surface of the housing 3 are provided on the left and right side surfaces of the housing 3. A plurality of through holes 34 are provided on the bottom surface of the grooves 33 to connect the internal space of the housing 3 with the external space. In other words, the surface of the housing 3 is provided with the through holes 34 that connect the internal space of the housing 3 with the external space. Because the plurality of through holes 34 connect the internal space of the housing 3 with the external space, even if the circuit components of the charging circuit unit 5 generate heat while the charging circuit unit 5 is charging the secondary battery B1, air is exchanged between the internal space and the external space via the through holes 34, allowing the heat from the circuit components to be dissipated to the outside.

[0053] The holder portion 4 is attached to the support portion 31 of the housing 3 .

[0054] The holder portion 4 is, for example, a molded product made of synthetic resin. As described above, the holder portion 4 has the tubular portion 41 and the guide portion 42. The holder portion 4 is detachable from the housing 3. The holder portion 4 is attached to the housing 3 using a fastening member such as a bolt. The holder portion 4 is detachable from the housing 3. Here, if there are multiple types of power tools 7, there will be multiple types of holder portions 4 corresponding to the multiple types of power tools 7. Since the holder portion 4 corresponding to the type of power tool 7 to be used is attached to the housing 3 of the charging device 2, there is an advantage that a common housing 3 can be used even if there are multiple types of power tools 7.

[0055] The cross section of the cylindrical portion 41 is formed in a circular or arc shape, and the tip portion of the head portion 71 can be inserted into the cylindrical portion 41. The cylindrical portion 41 has a first end 41A, which is an upper end, and a second end 41B, which face each other in the central axis direction. When the tip portion of the head portion 71 inserted into the cylindrical portion 41 is viewed from the insertion direction of the head portion 71, it has a shape like a circle connected to one side of a rectangle (see FIG. 8). Therefore, when viewed from the insertion direction, the inner circumferential surface of the cylindrical portion 41 also has a shape like a circle or an arc-shaped portion connected to one side of a rectangle.

[0056] The guide portion 42 moves the tool body 70 to a position where the receiving terminal portion TB2 can be connected to the supply terminal portion TB1 by moving at least one of the tip tool 9 and the head portion 71 while in contact with the guide portion 42 while the head portion 71 is inserted into the tubular portion 41.

[0057] In this embodiment, the guide portion 42 includes a first guide portion 43, a second guide portion 44, and a third guide portion 45.

[0058] The first guide portion 43 protrudes from the first end 41A of the tubular portion 41 in the direction opposite to the second end 41B (see FIGS. 4, 7, 10, and 11). The first guide portion 43 is formed in a funnel shape. The first guide portion 43 is formed in an inverted truncated cone shape whose diameter increases as it moves away from the first end 41A of the tubular portion 41. The first guide portion 43 has a first inclined surface 431 such that the size of the opening of the first guide portion 43 decreases as it approaches the first end 41A. When the head portion 71 moves while contacting the first inclined surface 431, the power receiving terminal TB2 moves to a position where it can be connected to the power supply terminal TB1. More specifically, when the head portion 71 moves while contacting the first inclined surface 431, the head portion 71 is inserted into the tubular portion 41, and the power receiving terminal TB2 moves to a position where it can be connected to the power supply terminal TB1.

[0059] The second guide portion 44 is provided at the second end 41B of the tubular portion 41 (see FIGS. 1, 5, and 11). The second guide portion 44 is funnel-shaped. More specifically, the second guide portion 44 is ring-shaped and has a through-hole 441 for passing the tool bit 9 therethrough. A funnel-shaped second inclined surface 442 is provided on the end face of the second guide portion 44 on the first end 41A side. The second guide portion 44 has the second inclined surface 442 such that the size of the opening of the second guide portion 44 increases as it approaches the first end 41A from the second end 41B. When at least one of the tool bit 9 and the head portion 71 attached to the power tool 7 moves while contacting the second inclined surface 442, the power receiving terminal TB2 moves to a position where it can be connected to the power supply terminal TB1. In this embodiment, when the tool tip 9 attached to the power tool 7 is inserted into the tubular portion 41, the tip of the tool tip 9 moves while contacting the second inclined surface 42, thereby guiding the power tool 7 to a position where the tool tip 9 is inserted into the through-hole 441. When the power tool 7 is placed on the charging device 2, the socket portion 92 of the tool tip 9 fits into the through-hole 441, and the socket portion 92 abuts against the inner surface of the through-hole 441, thereby restricting movement of the power tool 7 in a direction perpendicular to the central axis of the tubular portion 41.

[0060] The third guide portion 45 is a groove-like portion provided in each of the first guide portion 43 and the tubular portion 41 along the central axis of the tubular portion 41 (see FIGS. 4, 10, and 11). More specifically, the grooves constituting the third guide portion 45 include a first groove 451 on the rear side and a second groove 452 on the front side that is wider than the first groove 451. An arc-shaped guide portion 453 is provided at the step between the first groove 451 and the second groove 452. An arc-shaped guide portion 454 is also provided at the corner between the second groove 452 and the edge portion of the first guide portion 43. When the grip portion 73 moves while contacting the third guide portion 45, the power receiving terminal TB2 moves to a position where it can be connected to the power feeding terminal TB1. More specifically, when the grip portion 73 moves while contacting the third guide portion 45 and a portion of the grip portion 73 is inserted into the first groove portion 451 or the second groove portion 452 (see Figure 7), rotation of the grip portion 73 is restricted in the rotation direction around the central axis AX1 (see Figure 5) of the tubular portion 41 as the rotation center.

[0061] In this embodiment, the power supply terminal TB1 is provided on the protrusion 32 that protrudes from a portion near the rear of the housing 3. Since the power supply terminal TB1 is provided on the protrusion 32 that protrudes from the protrusion 31 of the housing 3, when the head 71 is inserted into the tubular portion 41 of the holder 4 and the power receiving terminal TB2 is connected to the power supply terminal TB1 provided on the protrusion 32, a space SP1 (see FIG. 5 ) is provided between the grip 73 and the protrusion 31. In other words, when the head 71 is inserted into the holder 4 and the power receiving terminal TB2 is connected to the power supply terminal TB1, a recess 35 is provided in the housing 3 at a portion facing the grip 73. By providing the recess 35, the shape of the housing 3 with the holder 4 attached when viewed from the left and right becomes U-shaped, and a space SP1 is provided between the grip 73 and the protrusion 31. Therefore, when placing the power tool 7 on the charging device 2 or removing the power tool 7 from the charging device 2, the hand can be placed in the space SP1 between the grip portion 73 and the support portion 31, which has the advantage of making the work easier.

[0062] (2.3) Operation explanation The charging operation of the charging system 1 of this embodiment to charge the secondary battery B1 of the power tool 7 will be described below. It is assumed that a tool tip 9 such as a box wrench socket 91 is connected to the output shaft 771 of the power tool 7.

[0063] In the charging system 1 of this embodiment, when the user places the power tool 7 on the charging device 2 during a break between tasks using the power tool 7 (see FIGS. 5 and 6), the secondary battery B1 of the power tool 7 is charged.

[0064] When placing the power tool 7 on the charging device 2, the user aligns the power tool 7 with the holder 4 and brings the power tool 7 close to the holder 4 so that the tool tip 9 is inserted into the tubular portion 41 of the holder 4 (see FIG. 3). When the tool tip 9 comes into contact with the first guide portion 43 of the holder 4, the tool tip 9 is guided into the tubular portion 41 while contacting the first guide portion 43 (see FIGS. 1 and 4). When the tip of the tool tip 9 hits the second guide portion 44 provided on the second end portion 41B of the holder 4, the tool tip 9 moves while contacting the second inclined surface 442 of the second guide portion 44, and the tool tip 9 is inserted into the through-hole 441 of the second guide portion 44.

[0065] As the tool bit 9 is further moved downward, the tip of the head portion 71 of the tool bit 9 comes into contact with the first guide portion 43 and is guided into the cylindrical portion 41 while still in contact with the first guide portion 43. When the grip portion 73 reaches a position where it abuts on the edge of the first guide portion 43, the user adjusts the orientation of the power tool 7 so that the grip portion 73 is inserted into the second groove 452 of the third guide portion 45. When the grip portion 73 is inserted into the second groove 452, the grip portion 73 moves while contacting the edge of the second groove 452 and the edge of the guide portion 453, so that a portion of the grip portion 73 is inserted into the second groove 452 or the first groove 451.

[0066] The first guide portion 43, the second guide portion 44, and the third guide portion 45 come into contact with the tool accessory 9 or the power tool 7, thereby restricting the position of the power tool 7 in a direction perpendicular to the central axis of the tubular portion 41 and restricting the orientation of the power tool 7 in a rotational direction about the central axis of the tubular portion 41. As a result, the power tool 7 moves to a position where the power receiving terminal TB2 can be connected to the power feeding terminal TB1, and the power tool 7 is held in the charging device 2 with the power receiving terminal TB2 connected to the power feeding terminal TB1 (see FIGS. 5 to 7). At this time, a charging current flows from the charging circuit portion 5 to the secondary battery B1 via the power feeding terminal TB1 and the power receiving terminal TB2, and the secondary battery B1 is charged.

[0067] When the user wants to remove the power tool 7 placed on the charging device 2 from the charging device 2 and perform work, the user simply holds the grip portion 73 of the power tool 7 by hand and pulls it in the opposite direction to the insertion direction. At this time, the power receiving terminal portion TB2 is detached from the power supply terminal portion TB1, and the power tool 7 and the tool tip 9 attached to the power tool 7 are removed from the holder portion 4, allowing the user to perform work using the power tool 7.

[0068] When the user holds the power tool 7 in the holder 4, if the user brings the grip 73 of the power tool 7 to a position where it is inserted into the second groove 452 of the third guide part 45 and then releases the grip 73, the power tool 7 slides down due to its own weight while being guided by the first guide part 43, the second guide part 42, and the third guide part 45, and the power receiving terminal TB2 connects to the power supply terminal TB1. At this time, the outer peripheral surface of the head part 71 of the power tool 7 comes into contact with the inner peripheral surface of the tubular part 41, thereby restricting movement of the power tool 7 in a direction perpendicular to the central axis of the tubular part 41. Furthermore, the tool tip 9 attached to the power tool 7 is inserted into the through-hole 441 of the second guide part 44, thereby restricting movement of the power tool 7 in a direction perpendicular to the central axis of the tubular part 41. Furthermore, by inserting the grip portion 73 into the first groove 451 or the second groove 452 of the third guide portion 45, rotation of the power tool 7 in the direction of rotation about the central axis of the tubular portion 41 is restricted. This positions the power tool 7 relative to the holder portion 4, and ensures that the power receiving terminal TB2 is securely connected to the power supply terminal TB1. Furthermore, when a user brings the grip portion 73 of the power tool 7 to a position where it is inserted into the second groove 452 of the third guide portion 45 and then releases the grip portion 73, the power tool 7 slides down due to its own weight while being guided by the first guide portion 43, the second guide portion 42, and the third guide portion 45, and moves to a position where the power receiving terminal TB2 is connected to the power supply terminal TB1. Therefore, the user does not need to hold the grip portion 73 and move the power tool 7 to a position where the power receiving terminal TB2 is connected to the power supply terminal TB1, and can easily hold the power tool 7 in the charging device 2.

[0069] (3) Variations The above embodiment is merely one of various embodiments of the present disclosure, and various modifications can be made to the above embodiment depending on the design and the like as long as the object of the present disclosure can be achieved.

[0070] Modifications of the above embodiment are listed below. The modifications described below can be applied in appropriate combinations. Hereinafter, the above embodiment may also be referred to as the basic configuration.

[0071] (3.1) Variation 1 The charging system 1 of the first modification will be described with reference to FIG.

[0072] The charging system 1 of the first modification further includes a distance adjustment member 60 for adjusting the distance L1 between the central axis AX1 of the holder portion 4 and the power supply terminal portion TB1. Note that the configuration other than the distance adjustment member 60 is the same as the basic configuration, and therefore the same components as the basic configuration are denoted by the same reference numerals and their description will be omitted.

[0073] If the capacity of the secondary battery B1 provided in the power tool 7 increases, the secondary battery B1 becomes larger and the battery accommodating section 72 becomes larger, which may change the distance between the central axis of the head section 71 and the receiving terminal section TB2 provided in the battery accommodating section 72.

[0074] Therefore, the charging system 1 of the first modification is provided with a distance adjustment member 60, which makes it possible to adjust the distance L1 between the central axis AX1 of the holder part 4 and the power supply terminal part TB1. Note that when the head part 71 is inserted into the holder part 4, the central axis AX1 of the holder part 4 and the central axis of the head part 71 are assumed to be substantially aligned.

[0075] The distance adjustment members 60 are members for connecting the housing 3 and the holder unit 4. The distance adjustment members 60 are, for example, metal plates. One distance adjustment member 60 is fixed to each of the left and right side surfaces of the housing 3. The distance adjustment members 60 are fixed to the side surfaces of the housing 3 using, for example, two fixing screws 61. The distance adjustment members 60 are also fixed to the holder unit 4 using, for example, two fixing screws 62. This connects the holder unit 4 and the housing 3 using the two distance adjustment members 60. Here, by changing the size of the distance adjustment members 60, the distance L1 between the central axis AX1 of the holder unit 4 and the power supply terminal TB1 can be changed. Therefore, the distance adjustment members 60 can be used to adjust the distance L1 between the central axis AX1 of the holder unit 4 and the power supply terminal TB1 so that it matches the distance between the central axis of the head unit 71 of the power tool 7 to be charged and the power receiving terminal TB2.

[0076] In the example of Figure 12, the position adjustment member 60 is a member that connects the housing 3 and the holder portion 4, but the position adjustment member may also be a sliding mechanism that slides the holder portion 4 relative to the power supply terminal portion TB1.

[0077] (3.2) Variation 2 The charging system 1 of the second modification will be described with reference to FIG.

[0078] In the basic configuration, the secondary battery B1 is accommodated in a battery housing section 72 that is part of the tool body 70 of the power tool 7, whereas in the second modification, the secondary battery B1 is accommodated in a case 101 that is detachable from the tool body 70. That is, in the second modification, the battery pack 100 that accommodates the secondary battery B1 inside the case 101 is detachable from the power tool 7. Note that the second modification is the same as the basic configuration except that the battery pack 100 is detachable from the power tool 7, and therefore components that are common to the basic configuration are denoted by the same reference numerals and their description will be omitted.

[0079] In the second modification, the battery pack 100, which is the battery accommodating section 72, includes a case 101 that accommodates the secondary battery B1. In addition, in order to charge the secondary battery B1 of the battery pack 100 with the charging device 2, the charging system 1 further includes an adapter 90 provided with a power receiving terminal section TB2.

[0080] The power tool 7 has a head portion 71 and a grip portion 73. The grip portion 73 has a battery pack attachment portion 78 to which the battery pack 100 can be attached and detached. The battery pack attachment portion 78 is provided with a fourth attachment portion 781 that fits with a third attachment portion 102 provided on a case 101 of the battery pack 100 when the battery pack 100 is directly attached to the battery pack attachment portion 78. The battery pack attachment portion 78 also has a fourth terminal that can be connected to a third terminal provided on the case 101 of the battery pack 100 when the battery pack 100 is directly attached to the battery pack attachment portion 78.

[0081] The adapter 90 includes a plate-shaped base portion 95 and a cover portion 92 .

[0082] The base portion 95 is attached between the battery pack attachment portion 78 of the power tool 7 and the case 101 of the battery pack 100. A first attachment portion 93 that fits with the fourth attachment portion 781 and a first terminal portion that can be connected to the fourth terminal portion are provided on the surface of the base portion 95 facing the battery pack attachment portion 78. Furthermore, a second attachment portion 94 that fits with the third attachment portion 102 and a second terminal portion that can be connected to the third terminal portion are provided on the surface of the base portion 95 facing the battery pack 100.

[0083] The cover part 92 extends from a portion (front end) of the base part 95 facing the housing 3 so as to cover the front surface of the battery pack 100. The cover part 92 is provided with a power receiving terminal part TB2 that can be connected to a power supply terminal part TB1 provided on the charging device 2.

[0084] Here, the power receiving terminal TB2 provided on the adapter 90 is electrically connected to the first terminal and the second terminal. Therefore, when the adapter 90 is attached between the battery pack attachment portion 78 and the battery pack 100, the power receiving terminal TB2 provided on the adapter 90 is electrically connected to the secondary battery B1 of the battery pack 100. In addition, the third terminal of the battery pack 100 is electrically connected to the fourth terminal of the power tool 7 via the adapter 90, so that the power tool 7 can operate with power supplied from the secondary battery B1.

[0085] As described above, the adapter 90 has a first attachment portion 93 that can be attached to the battery pack attachment portion 78 and a second attachment portion 94 that can be attached to the battery pack 100. By attaching the first attachment portion 93 to the battery pack attachment portion 78 and the second attachment portion 94 to the battery pack 100, the power receiving terminal portion TB2 is electrically connected to the secondary battery B1 with the adapter 90 attached between the battery pack attachment portion 78 and the battery pack 100.

[0086] In the charging system 1 of the second modification, the secondary battery B1 of the battery pack 100 can be charged while the power tool 7, to which the battery pack 100 can be attached, is held in the charging device 2. One battery pack 100 selected from multiple types of battery packs 100 with different secondary battery B1 capacities can be attached to the power tool 7. The multiple types of battery packs 100 with different battery capacities have different sizes due to the differences in the secondary battery B1 capacities. However, because the power receiving terminal TB2 is provided on the adapter 90, the position of the power receiving terminal TB2 remains the same regardless of the type of battery pack 100 attached to the power tool 7. Therefore, the charging device 2 can hold the power tool 7 with any type of battery pack 100 attached and can charge the secondary battery B1 of the battery pack 100 attached to the power tool 7.

[0087] (3.3) Variation 3 The charging system 1 of the third modification will be described with reference to FIG.

[0088] In the basic configuration, the charging circuit unit 5 is housed inside the housing 3, whereas in the modified example 3, the charging circuit unit 5A is housed in a second housing 50 separate from the first housing, that is, the housing 3. Note that the configuration is the same as the basic configuration except that the charging circuit unit 5A is housed in the second housing 50, and therefore the same components as the basic configuration are denoted by the same reference numerals and their description will be omitted.

[0089] The charging circuit unit 5A is housed in a second housing 50 that is separate from the first housing, housing 3. An attachment plug PG1 is connected to an electric wire CB1 that is drawn out from the second housing 50. In addition, an electric wire CB2 that is drawn out from the second housing 50 is connected to a power supply terminal unit TB1 provided on the housing 3.

[0090] When the attachment plug PG1 connected to the electric wire CB1 is plugged into a power outlet, AC power is supplied to the charging circuit unit 5A from an external power source PS1, such as a commercial AC power supply. The charging circuit unit 5A converts the AC voltage supplied from the external power source PS1 into DC voltage and outputs it to the power supply terminal unit TB1, allowing the secondary battery B1 of the power tool 7 placed in the charging device 2 to be charged.

[0091] In the third modification, the charging circuit section 50A is housed in the second housing 50, so that the housing 3 can be made smaller.

[0092] (3.4) Variation 4 The charging system 1 of the fourth modification will be described with reference to FIG.

[0093] A plurality of charging devices 2 described in the basic configuration and modifications 1 to 3 can be installed and used side by side. Fig. 15 shows an example of use in which two charging devices 2 are installed side by side.

[0094] The two charging devices 2 are installed with the left and right side surfaces of the housings 3 in contact with each other. In the installation example shown in Fig. 15, the two charging devices 2 are arranged with the left side surface of the right charging device 2 in contact with the right side surface of the left charging device 2. Since the two charging devices 2 are installed side by side in the left-right direction, the secondary batteries B1 of two power tools 7 can be charged simultaneously.

[0095] In this case, the groove 33 provided on the left side surface of the right charging device 2 and the groove 33 provided on the right side surface of the left charging device 2 combine to form an air passage P1, which has the advantage of making it easier for air to move between the internal space and external space of the housing 3 in each of the two charging devices 2.

[0096] In the example of Figure 15, two charging devices 2 are installed side by side in the left-right direction, but three or more charging devices 2 may be installed side by side in the left-right direction, and the secondary batteries B1 of three or more power tools 7 can be charged simultaneously.

[0097] (3.5) Other Modifications The power tool 7 is not limited to an impact driver, but may be a drill driver or the like.

[0098] The secondary battery B1 is not limited to an all-solid-state battery, and may be a nickel-metal hydride battery, a lithium-ion battery, or the like.

[0099] The charging device 2 may also include a detection unit for detecting whether the power receiving terminal TB2 is connected to the power supply terminal TB1. The detection unit is, for example, a momentary push button switch whose contacts are turned on only while the power receiving terminal TB2 is connected to the power supply terminal TB1. The push button of the push button switch is located on the upper surface of the protrusion 32, and when the power receiving terminal TB2 is connected to the power supply terminal TB1, the push button switch is turned on when the battery holder 72 presses the push button. The charging circuit unit 5 may output a DC voltage to the power supply terminal TB1 only while the contacts of the push button switch are turned on, and when the power receiving terminal TB2 is not connected to the power supply terminal TB1, the output of the charging circuit unit 5 can be stopped.

[0100] In the basic configuration, the holder portion 4 is detachable from the housing 3 , but the holder portion 4 may be provided integrally with the housing 3 .

[0101] Furthermore, the shape of the charging device 2 including the holder portion 4 and the housing 3 is an example, and can be changed as appropriate depending on the shape of the power tool 7, etc.

[0102] (summary) The above-described embodiments and the like disclose the following aspects.

[0103] The charging system (1) of the first aspect includes a power supply terminal unit (TB1), a housing (3), a holder unit (4), and a charging circuit unit (5). The power supply terminal unit (TB1) is connectable to a power receiving terminal unit (TB2) that is connected to a secondary battery (B1) of a portable power tool (7). The power tool (7) has a cylindrical head unit (71) that houses a motor (77) and a grip unit (73) that an operator can hold, and the grip unit (73) is provided between the head unit (71) and a battery housing unit (72) that houses the secondary battery (B1). The power supply terminal unit (TB1) is provided in the housing (3). The holder unit (4) is capable of holding the head unit (71) of the power tool (7). The charging circuit unit (5) can supply a charging current to the secondary battery (B1) via the power supply terminal unit (TB1) and the power receiving terminal unit (TB2) using power supplied from an external power source (PS1) when the power supply terminal unit (TB1) is connected to the power receiving terminal unit (TB2). The holder unit (4) has a cylindrical portion (41) with a circular or arc-shaped cross section and a guide portion (42). The cylindrical portion (41) is positioned so that its central axis intersects the horizontal direction, and the head portion (71) can be inserted into it from its upper end. When the head portion (71) is inserted into the cylindrical portion (41), the holder unit (4) is positioned so that the power supply terminal unit (TB1) and the power receiving terminal unit (TB2) can be connected. While the head portion (71) is being inserted into the tubular portion (41), at least one of the tip tool (9) attached to the power tool (7) and the head portion (71) moves while contacting the guide portion (42), thereby moving the power receiving terminal portion (TB2) to a position where it can be connected to the power supply terminal portion (TB1).

[0104] According to this aspect, when the head portion 71 of the power tool 7 is inserted into the tubular portion 41, at least one of the tool bit 9 and the head portion 71 moves while contacting the guide portion 42, so that the power receiving terminal portion TB2 moves to a position where it can be connected to the power feeding terminal portion TB1. Therefore, the user of the power tool 7 does not need to hold the grip portion 73 and move the power tool 7 to a position where the power receiving terminal portion TB2 can be connected to the power feeding terminal portion TB1, and can let go of the grip portion 73 along the way, thereby reducing the effort required to charge the secondary battery B1 of the power tool 7.

[0105] In the charging system (1) of the second aspect, in the first aspect, the tubular portion (41) has a first end portion (41A) that is an upper end portion and a second end portion (41B) that face each other in the central axis direction. The guide portion (42) includes a funnel-shaped first guide portion (43), a funnel-shaped second guide portion (44), and a groove-shaped third guide portion (45). The first guide portion (43) protrudes from the first end portion (41A) of the tubular portion (41) in a direction opposite to the second end portion (41B). The second guide portion (44) is provided at the second end portion (41B) of the tubular portion (41). The third guide portion (45) is provided on each of the first guide portion (43) and the tubular portion (41) along the central axis direction of the tubular portion (41). The first guide portion (43) has a first inclined surface (431) such that the size of the opening of the first guide portion (43) decreases as it approaches the first end portion (41A), and the head portion (71) moves while contacting the first inclined surface (431), thereby moving the power receiving terminal portion (TB2) to a position where it can be connected to the power supply terminal portion (TB1). The second guide portion (44) has a second inclined surface (442) such that the size of the opening of the second guide portion (44) increases as it moves from the second end portion (41B) to the first end portion (41A), and the power receiving terminal portion (TB2) moves to a position where it can be connected to the power supply terminal portion (TB1) as at least one of the tool bit (9) attached to the power tool (7) and the head portion (71) moves while contacting the second inclined surface (442). As the grip portion (73) moves while contacting the third guide portion (45), the power receiving terminal portion (TB2) moves to a position where it can be connected to the power supply terminal portion (TB1).

[0106] According to this embodiment, at least one of the tool tip (9) and the head portion (71) moves while contacting the first guide portion (43), the second guide portion (44), or the third guide portion (45), thereby allowing the power receiving terminal portion (TB2) to be moved to a position where it can be connected to the power supply terminal portion (TB1).

[0107] In the charging system (1) of the third aspect, in the first or second aspect, the holder portion (4) is detachable from the housing (3).

[0108] According to this embodiment, if the shape of the head portion (71) of the power tool (7) is changed, the holder portion (4) corresponding to the changed power tool (7) can be attached to the housing (3), thereby making it possible to accommodate changes in the specifications of the power tool (7).

[0109] In the charging system (1) of the fourth aspect, in any of the first to third aspects, when the head portion (71) is inserted into the holder portion (4) and the power receiving terminal portion (TB2) is connected to the power supply terminal portion (TB1), a recess (35) is provided in the housing (3) at a position facing the grip portion (73).

[0110] According to this embodiment, when the head portion (71) is inserted into the holder portion (4) and the power receiving terminal portion (TB2) is connected to the power supply terminal portion (TB1), a space is created between the housing (3) and the grip portion (73), which has the advantage that the grip portion (73) can be easily held by hand.

[0111] The charging system (1) of a fifth aspect is the charging system (1) of any one of the first to fourth aspects, further comprising a distance adjustment member (60) for adjusting the distance between the central axis of the holder portion (4) and the power supply terminal portion (TB1).

[0112] According to this embodiment, even if there are multiple types of power tools (7) with different distances between the center axis of the holder part (4) and the power supply terminal part (TB1), the distance adjustment member (60) can adjust the distance between the center axis of the holder part (4) and the power supply terminal part (TB1) to match the power tool (7) to be charged.

[0113] In the charging system (1) of the sixth aspect, in any one of the first to fifth aspects, the housing (3) accommodates the charging circuit section (5).

[0114] According to this embodiment, since the charging circuit section (5) is housed inside the housing (3), the effort required to install the charging circuit section (5) separately from the housing (3) can be reduced.

[0115] In the charging system (1) of the seventh aspect, in any one of the first to fifth aspects, the housing (3) is a first housing. A charging circuit section (5A) is housed in a second housing (50) separate from the first housing.

[0116] According to this aspect, the first housing can be made smaller.

[0117] The charging system (1) of an eighth aspect is the charging system (1) of any one of the first to seventh aspects, further including a holding part (87) that magnetically holds the power receiving terminal part (TB2) and the power feeding terminal part (TB1) in a connected state.

[0118] This embodiment has the advantage that the power receiving terminal portion (TB2) is less likely to come off the power supply terminal portion (TB1).

[0119] In the charging system (1) of a ninth aspect, in any one of the first to eighth aspects, a through-hole (34) is provided in a surface of the housing (3) to connect the internal space of the housing (3) with the external space.

[0120] According to this embodiment, air can flow in and out between the internal space and the external space of the housing 3 through the through-holes 34. When the charging circuit unit 5 is disposed in the internal space of the housing 3, heat generated by the circuit components of the charging circuit unit 5 can be dissipated to the outside.

[0121] The charging system (1) of a tenth aspect is any one of the first to ninth aspects, further including a power tool (7).

[0122] According to this aspect, the user of the power tool (7) does not need to hold the grip portion (73) and move the power tool (7) to the position where the power receiving terminal portion (TB2) connects with the power supply terminal portion (TB1), and can let go of the grip portion (73) along the way, thereby reducing the effort required to charge the secondary battery (B1) of the power tool (7).

[0123] In the charging system (1) of the eleventh aspect, in the tenth aspect, the secondary battery (B1) is an all-solid-state battery.

[0124] According to this embodiment, since the all-solid-state battery can be charged faster than a lithium-ion battery or the like, the battery capacity of the secondary battery B1 can be reduced by placing the power tool 7 on the charging device 2 and charging it between tasks using the power tool 7. This allows the power tool 7 to be made smaller and lighter.

[0125] The charging system (1) of a twelfth aspect is the same as that of the tenth or eleventh aspect, and further includes a battery pack (100) that is a battery housing (72), and an adapter (90) provided with a power receiving terminal (TB2). The battery pack (100) includes a case (101) that houses a secondary battery (B1). The power tool (7) has a head (71) and a grip (73). The grip (73) has a battery pack attachment part (78) to which the battery pack (100) can be attached or detached. The adapter (90) has a first attachment part (93) that can be attached to the battery pack attachment part (78) and a second attachment part (94) that can be attached to the battery pack (100). By attaching the first attachment portion (93) to the battery pack attachment portion (78) and the second attachment portion (94) to the battery pack (100), the power receiving terminal portion (TB2) is electrically connected to the secondary battery (B1) with the adapter (90) attached between the battery pack attachment portion (78) and the battery pack (100).

[0126] According to this embodiment, one battery pack (100) selected from a plurality of types of battery packs (100) with different secondary battery (B1) capacities can be attached to the power tool (7). The plurality of types of battery packs (100) with different battery capacities have different sizes due to the difference in the secondary battery (B1) capacities. However, since the power receiving terminal section (TB2) is provided on the adapter (90), the position of the power receiving terminal section (TB2) is the same even when any type of battery pack (100) is attached to the power tool (7). Therefore, the charging device (2) can hold the power tool (7) with any type of battery pack (100) attached and can charge the secondary battery (B1) of the battery pack (100) attached to the power tool (7).

[0127] The charging device (2) of the thirteenth aspect is the charging device (2) included in the charging system (1) of any one of the first to twelfth aspects. The charging device (2) includes a power supply terminal section (TB1), a housing (3), a holder section (4), and a charging circuit section (5).

[0128] According to this embodiment, the time and effort required to charge the secondary battery (B1) of the power tool (7) can be reduced.

[0129] The power tool (7) of a fourteenth aspect is the power tool (7) included in the charging system (1) of any one of the tenth to twelfth aspects.

[0130] According to this embodiment, the time and effort required to charge the secondary battery (B1) of the power tool (7) can be reduced.

[0131] The battery pack (100) of the fifteenth aspect is a battery pack (100) that is detachable from the power tool (7) included in the charging system (1) of the twelfth aspect.

[0132] According to this embodiment, the time and effort required to charge the secondary battery (B1) of the power tool (7) can be reduced.

[0133] The configurations according to the second to twelfth aspects are not essential for the charging system (1) and can be omitted as appropriate. [Explanation of symbols]

[0134] 1 Charging System 2 Charging device 3. Housing 4 Holder part 5 Charging circuit section 7 Power tools 9 Tip tool 34 Through hole 35 recess 41 Cylinder part 41A 1st end 41B 2nd end 42 Guide section 43 First guide section 44 Second guide section 45 Third guide section 60 Distance adjustment member 71 Head 72 Battery compartment 73 Grip section 77 Motor 78 Battery pack attachment part 87 Holding part 90 adapter 93 First mounting part 94 Second mounting part 100 battery packs 101 cases 431 1st slope 442 2nd slope B1 secondary battery PS1 external power supply TB1 power supply terminal TB2 power receiving terminal

Claims

1. a power supply terminal portion connectable to a power receiving terminal portion connected to a secondary battery of a portable power tool having a cylindrical head portion that houses a motor and a grip portion for an operator to hold, the grip portion being provided between the head portion and a battery housing portion that houses a secondary battery; a housing provided with the power supply terminal portion; a holder portion capable of holding the head portion of the power tool; a charging circuit unit that is capable of supplying a charging current to the secondary battery via the power supply terminal unit and the power receiving terminal unit using power supplied from an external power source when the power supply terminal unit is connected to the power receiving terminal unit, the holder portion has a cylindrical portion having a circular or arc-shaped cross section, into which the head portion can be inserted from an upper end, and is arranged so that a central axis direction thereof intersects with a horizontal direction, and a guide portion; the holder is disposed at a position where the power supply terminal and the power receiving terminal can be connected with each other when the head is inserted into the cylindrical portion; While the head portion is inserted into the cylindrical portion, at least one of the tool tip attached to the power tool and the head portion moves while contacting the guide portion, whereby the power receiving terminal portion moves to a position where it can be connected to the power supply terminal portion. Charging system.

2. the cylindrical portion has a first end portion, which is the upper end portion, and a second end portion, which are opposed to each other in a central axis direction; The guide portion is a funnel-shaped first guide portion that protrudes from the first end of the cylindrical portion in a direction opposite to the second end; a funnel-shaped second guide portion provided at the second end of the cylindrical portion; a groove-shaped third guide portion provided in each of the first guide portion and the cylindrical portion along the central axis direction of the cylindrical portion, the first guide portion has a first inclined surface such that the size of the opening of the first guide portion decreases as the head portion approaches the first end portion, and the power receiving terminal portion moves to a position where the power receiving terminal portion can be connected to the power supply terminal portion by the head portion moving while contacting the first inclined surface; the second guide portion has a second inclined surface such that the size of the opening of the second guide portion increases as the opening approaches the first end from the second end, and when at least one of the tool bit and the head portion attached to the power tool moves while contacting the second inclined surface, the power receiving terminal portion moves to a position where it can be connected to the power supply terminal portion; the grip portion moves while contacting the third guide portion, thereby moving the power receiving terminal portion to a position where the power receiving terminal portion can be connected to the power supply terminal portion. The charging system of claim 1 .

3. The holder portion is detachable from the housing. The charging system of claim 1 .

4. a recess is provided in a portion of the housing facing the grip portion when the head portion is inserted into the holder portion and the power receiving terminal portion is connected to the power supply terminal portion; The charging system of claim 1 .

5. a distance adjusting member for adjusting the distance between the central axis of the holder and the power supply terminal; The charging system of claim 1 .

6. The housing accommodates the charging circuit unit. The charging system of claim 1 .

7. the housing is a first housing, The charging circuit unit is accommodated in a second housing separate from the first housing. The charging system of claim 1 .

8. The power supply terminal unit further includes a holding unit that holds the power receiving terminal unit and the power supply terminal unit in a connected state by magnetic force. The charging system of claim 1 .

9. A through hole is provided on the surface of the housing to connect the internal space and the external space of the housing. The charging system of claim 1 .

10. The power tool further includes: The charging system of claim 1 .

11. The secondary battery is an all-solid-state battery. The charging system of claim 10.

12. a battery pack serving as the battery housing; an adapter provided with the power receiving terminal unit, the battery pack includes a case that houses the secondary battery; The power tool has the head portion and the grip portion, the grip portion has a battery pack attachment portion to which the battery pack can be attached and detached, the adapter has a first attachment portion attachable to the battery pack attachment portion and a second attachment portion attachable to the battery pack; By attaching the first attachment portion to the battery pack attachment portion and the second attachment portion to the battery pack, the power receiving terminal portion is electrically connected to the secondary battery in a state in which the adapter is attached between the battery pack attachment portion and the battery pack. The charging system of claim 10.

13. A charging device provided in the charging system according to any one of claims 1 to 12, The charging device includes the power supply terminal unit, the housing, the holder unit, and the charging circuit unit. Charging device.

14. A power tool equipped with the charging system according to any one of claims 10 to 12.

15. A battery pack detachable from a power tool, the battery pack being provided in the charging system according to claim 12.

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