TW201741091A - Connection line and electric tool capable of preventing a power cord from being cut off from connecting a power tool body to a battery cell - Google Patents

Abstract

The present invention provides a structure capable of preventing a power cord from being cut off from connecting a power tool body to a battery cell when the connection line is subjected to a longitudinal impact. The connection line (14) includes a wire body (16), a first connector (18), and a second connector (20). The first connector (18) is configured to be attachable to the power tool body (10), and the second connector (20) is configured to be attachable to the battery unit (12). The first connector (18) and the second connector (20) are connected by the connection line (14). The wire body (16) has a wire member (22), power supply wires (24a, 24b), and a tubular member (30). The tubular member (30) is provided so as to cover the wire member (22) and the power supply wires (24a, 24b). The length of the power supply wires (24a, 24b) is greater than the length of the wire member (22) and the length of the tubular member (30).

Description

Cable and power tool

The present invention relates to a connecting wire for electrically connecting a power tool body and a battery unit, and a power tool including the same.

At the job site, various rechargeable power tools are used. In particular, hand-held power tools (such as impact tools) are easy to operate. Therefore, work at a high place and the like are reused.

As a hand-held power tool, for example, a power tool in which a battery is mounted on a power tool body is known. In the case of such a power tool, the battery is disposed in such a manner as to be detachable from the power tool body. Therefore, when the battery is charged, the battery can be removed from the power tool. Thereby, the charging work becomes easy.

On the other hand, from the viewpoint of work efficiency, it is preferable to make the weight of the electric power tool small. However, in the above-described configuration in which the battery is attached to the power tool body, the battery weight is large. Therefore, it is difficult to make the weight of the power tool small.

Therefore, conventionally, there has been proposed an electric power tool in which a battery and a power tool body are separated from each other (for example, refer to Patent Document 1). Special In the hand-held power tool described in the document 1, the power tool main body and the battery (power supply unit) are separately provided. The power tool body and the battery are connected by a flexible wire.

In the hand-held power tool of Patent Document 1, the power tool body is separated from the battery as described above, whereby the power tool body can be made smaller and lighter than the conventional battery-integrated power tool. Further, by using a flexible electric wire as described above, it is possible to prevent the electric wire from being obstructed by the work.

However, when using the above-described electric power tool at a construction site in Japan, there is an obligation to attach a rope or the like for preventing falling to a power tool. Therefore, when the electric power tool described in Patent Document 1 is used, in addition to the electric wire, it is necessary to attach a rope or the like that prevents falling to the electric power tool body. However, there is a case where work efficiency is lowered due to entanglement of wires and ropes during work.

On the other hand, Patent Document 2 discloses a cordless power tool in which a main body and a battery are connected by a wire containing a cable. In the cordless power tool disclosed in Patent Document 2, the electric wire system functions to prevent falling. Therefore, it is possible to prevent the body from falling by the electric wires. In addition, since the cable is disposed in the electric wire, there is no problem that the electric wire is entangled with the cable. Thereby, it is possible to prevent the aforementioned work efficiency from being lowered due to the winding of the electric wires.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Utility New Case Registration No. 3109342

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2007-111857

However, as a result of research by the inventors, it has been found that in the configuration in which the cable is disposed in the electric wire, when the power tool body is dropped, the power cord in the electric wire is easily cut. At this time, there is a flaw in the electric wire, which is not preferable.

An object of the present invention is to provide a configuration for connecting a power tool body to a connection line of a battery unit, and preventing the power supply line from being cut when an impact is applied in the longitudinal direction of the connection line.

(1) A connecting wire according to an embodiment of the present invention is a connecting wire for electrically connecting a power tool main body and a battery unit. The connecting wire according to the present embodiment includes: a first connector attached to the electric power tool main body; a second connector attached to the battery unit; and a linear member connecting the first connector and the second connector a power supply line that connects the first connector and the second connector, and has a power supply current supplied from the battery unit to the power tool main body; and a tubular member that connects the first connector and the The second connector covers the wire member and the power supply line. The length of the power cord is greater than the length of the linear member and the length of the tubular member.

According to the above configuration, for example, when the power tool body is dropped and an impact in the longitudinal direction is applied to the connecting wire, a tensile force is applied to the linear member and the tubular member prior to the power supply line. Thereby, it is possible to prevent a large tensile force from being applied to the power supply line. Therefore, it is possible to prevent the power cord from being cut.

(2) The tubular member is configured to be expandable and contractible in a tube axis direction, and the length of the linear member is smaller than a maximum length of the tubular member, and a length of the power cord is longer than a maximum length of the tubular member. Big can also.

The length of the linear member is smaller than the maximum length of the tubular member. Therefore, when a longitudinal impact is applied to the connecting wire, a large tensile force is first applied to the linear member. Thereby, the linear member is cut off before the tubular member. In this way, by forming the connecting wire so that the linear member is cut earlier than the tubular member, when a longitudinal impact is applied to the connecting wire, it is possible to suppress a large tensile force from being applied to the tubular member. Thereby, the tubular member can be prevented from being cut. Further, the length of the power cord is greater than the maximum length of the tubular member. According to this configuration, after the linear member is cut, for example, the load of the power tool body causes the tubular member to extend to the maximum length, and it is possible to prevent a large tensile force from being applied to the power supply line. Therefore, it is possible to more reliably prevent the power supply line from being cut.

(3) The connection line may further include: a signal line that connects the first connector and the second connector, and transmits an electrical signal between the power tool main body and the battery unit. The signal line is subjected to the foregoing between the first connector and the second connector The tubular member is covered, and the length of the signal line is longer than the length of the linear member and smaller than the maximum length of the tubular member.

According to the above configuration, when the linear member is cut against the connecting wire and the linear member is cut, a large tensile force is applied to the signal line before the tubular member. Thereby, for example, when the signal line is cut off, the transmission and reception of the electrical signal cannot be performed between the power tool body and the battery unit. At this time, for example, the control unit of the electric power tool determines that the electric power tool has failed, and can stop the driving of the electric power tool main body. In this way, by deliberately cutting the signal line, it is possible to prevent the power tool body from falling behind the power tool body. Further, even if the connection line to which the impact in the longitudinal direction is applied is judged to be not seriously damaged as long as the signal line is not cut. At this time, the operator can continue to use the power tool body with peace of mind.

(4) The signal line and the power supply line may be connected to at least one of the first connector and the second connector.

Thereby, the length of the signal line between the connecting portion of the signal line and the power line and the first connector or the second connector is shorter than the entire signal line. Therefore, when a longitudinal impact is applied to the connection line, the amount of extension of the signal line after the signal line between the connection portion and the first connector or the second connector is cut is cut by the signal line. The overall extension of the signal line until the break is smaller. Therefore, when a shock in the longitudinal direction is applied to the connection line, the signal line is easily cut off compared with the configuration in which the signal line and the power line are not connected. Thereby, after the impact of the longitudinal direction is applied to the connection line and the linear member is cut, the signal line can be cut before the tubular member and the power supply line are applied with a large tensile force. Therefore, it can be more certain Prevent the power cord from being cut off in the field.

(5) a length between the connecting portion of the power supply line and one of the first connector and the second connector is longer than a length between the connecting portion of the signal line and the connector of the one of the connectors Also.

Therefore, when a longitudinal impact is applied to the connection line, before the connection line between the signal line and the power line and the power line between the first connector and the second connector generate a large tensile force, The signal line between the aforementioned connecting portion and the connector of the aforementioned one is cut. Thereby, it is possible to more reliably prevent the power supply line from being cut.

(6) The power cord has a folded-back portion that is folded back in the longitudinal direction. In the power supply line, a portion between the folded portion and the first connector or a portion between the folded portion and the second connector may be connected to the signal line.

Thereby, the length of the portion including the folded portion in the portion between the connection portion of the signal line and the power line and the first connector or the portion between the connecting portion and the second connector in the power line is The component of the foldback portion is greater than the length of the signal line corresponding to the portion. Thereby, when a shock in the longitudinal direction is applied to the connecting wire, the signal wire can be more easily cut. Therefore, it is possible to more reliably prevent the power supply line from being cut.

(7) The signal line has a loop portion that is bent in a loop shape in the longitudinal direction, and the inner side of the loop portion may be coupled to the power source line by a fixture.

Thereby, the signal can be more surely fixed by the fixture The wire is fixed to the power cord. Thereby, when a shock in the longitudinal direction is applied to the connecting wire, the signal wire can be more easily cut.

(8) The folded portion may be a portion where the power supply line in the tubular member is folded back at at least two locations. At this time, the longest power supply line among the linear member, the power supply line, and the tubular member can be easily accommodated in the tubular member.

(9) The tubular member may be formed by a braid. At this time, the connection line can be made lighter.

(10) The linear member may be made of metal. At this time, it is possible to prevent a small load from causing the linear member to be simply cut.

(11) The connecting wire may further include a spiral tube that is provided in the tubular member so as to cover at least the power supply line. At this time, the power cord can be protected.

(12) A power tool according to another embodiment of the present invention includes a power tool body and the aforementioned connecting wire. The electric power tool according to the embodiment includes the aforementioned connecting wire. Thereby, when a shock in the longitudinal direction is applied to the connection line, it is possible to prevent the power supply line from being cut.

According to the present invention, in a connecting wire for connecting a power tool body to a battery, it is possible to prevent the power cord from being cut off when an impact is applied in the longitudinal direction of the connecting wire.

10‧‧‧Power tool body

12‧‧‧ battery unit

14‧‧‧Connecting line

16‧‧‧ line ontology

18‧‧‧1st connector

20‧‧‧2nd connector

22‧‧‧Line members

24a, 24b‧‧‧ power cord

24c, 24d‧‧‧Devolation

26a, 26b‧‧‧ signal line

26c‧‧‧Return

28‧‧‧Spiral tube

30‧‧‧Tubular components

32‧‧‧Shell Department

34‧‧‧ circuit board

36‧‧‧Linking components

38, 60‧‧‧Installation unit

70‧‧‧ Fixtures

100‧‧‧Power Tools

[Fig. 1] Fig. 1 is a view showing a schematic configuration of an electric power tool according to an embodiment of the present invention.

[Fig. 2] Fig. 2 is a view showing a connecting line.

[Fig. 3] Fig. 3 is a view showing one end portion of the wire body, the connecting member, and the mounting unit.

[Fig. 4] Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 3.

[Fig. 5] Fig. 5 is a view showing a connecting member and an exploded mounting unit.

[Fig. 6] Fig. 6 is a view showing a casing portion and an exploded mounting unit.

[Fig. 7] Fig. 7 is a sectional view taken along line VII-VII of Fig. 2;

[Fig. 8] Fig. 8 is a view showing a power supply line.

[Fig. 9] Fig. 9 is a view showing a state in which a power supply line and a signal line are connected by a fixture.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Moreover, the size of the constituent members in each drawing does not faithfully indicate the size of the actual constituent member, the dimensional ratio of each constituent member, and the like.

(The overall composition of the power tool)

Fig. 1 is a view showing a schematic configuration of an electric power tool 100 according to an embodiment of the present invention. Referring to Fig. 1, the power tool 100 is electrically powered. The tool body 10, the battery unit 12, and the connecting wire 14. Moreover, in the first drawing, in order to show the internal structure of the connecting wire 14, a part of the spiral pipe 28 and the tubular member 30 which will be described later are removed.

The power tool main body 10 has the same configuration as a conventional impact tool (such as an impact wrench) that can remove the battery unit. Moreover, as the configuration of the electric power tool main body 10, it is possible to use the configuration of the electric power tool main body of various known electric power tools. Therefore, a detailed description of the power tool body 10 is omitted.

The battery unit 12 includes a battery pack 12a and a holder 12b. In the present embodiment, the battery pack 12a and the holder 12b are configured to be detachable from each other. Moreover, the configuration of the battery unit 12 is not limited to the example shown in Fig. 1, and various known battery cells can be used.

The power tool body 10 and the battery unit 12 are connected by a connecting wire 14. The battery unit 12 is, for example, a work wear, a belt, or the like that is fixed to an operator. Hereinafter, the connection line 14 will be described in detail.

(composition of the connecting line)

Fig. 2 is a view showing the connecting line 14. Referring to FIGS. 1 and 2, the connecting wire 14 includes a wire main body 16, a first connector 18, and a second connector 20. The first connector 18 and the second connector 20 are connected by the wire body 16. The first connector 18 is configured to be attachable to the power tool main body 10, and the second connector 20 is configured to be attachable to the battery unit 12.

Referring to Figure 1, the wire body 16 has a linear member 22. A pair of power supply lines 24a, 24b, a plurality (two in the present embodiment), signal lines 26a, 26b, a spiral tube 28, and a tubular member 30. As will be described later, in the present embodiment, the linear member 22, the power supply lines 24a and 24b, the signal lines 26a and 26b, and the tubular member 30 are connected to the first connector 18 and the second connector 20, respectively.

The linear member 22 is made of, for example, a metal such as stainless steel. In the present embodiment, as the linear member 22, for example, a wire formed by twisting a wire can be used. As will be described later, the one end portion of the linear member 22 is connected to the first connector 18, and the other end portion of the linear member 22 is connected to the second connector 20.

A power source current supplied from the battery unit 12 to the power tool body 10 flows through the power lines 24a and 24b. One end of each of the power supply lines 24a and 24b is connected to the circuit board 34 (see FIG. 2) described later in the first connector 18, and the other end of each of the power supply lines 24a and 24b is connected to the second connector 20. The circuit board 58 will be described later (see FIG. 2).

The signal lines 26a, 26b transmit electrical signals between the power tool body 10 and the battery unit 12. The electric signal transmitted between the power tool body 10 and the battery unit 12 is, for example, an abnormal signal indicating the battery pack 12a, a signal indicating the temperature of the battery pack 12a, a signal indicating the number of times of charging and discharging the battery pack 12a, and a display battery. The signal of the degree of deterioration of the package 12a, and the like. One end of each of the signal lines 26a and 26b is connected to the circuit board 34 of the first connector 18 (see FIG. 2), and the other end of each of the signal lines 26a and 26b is connected to the circuit of the second connector 20. Substrate 58 (see Fig. 2).

The spiral tube 28 is made of, for example, a resin. The spiral tube 28 is provided between the first connector 18 and the second connector 20 so as to cover the linear member 22, the power supply lines 24a and 24b, and the signal lines 26a and 26b. In the present embodiment, the spiral tube 28 is provided to protect the power lines 24a, 24b and the signal lines 26a, 26b.

The tubular member 30 is configured to be expandable and contractible in the tube axis direction. In the present embodiment, the tubular member 30 is configured to have a strength that is not cut even if the entire weight of the electric power tool 100 acts on the tubular member 30. As the tubular member 30, for example, a braid formed into a tubular shape can be used. The tubular member 30 is provided in such a manner as to cover the linear member 22, the power supply lines 24a, 24b, the signal lines 26a, 26b, and the spiral tube 28. As will be described later, the one end portion of the tubular member 30 is connected to the first connector 18, and the other end portion of the tubular member 30 is connected to the second connector 20.

Referring to Fig. 2, the first connector 18 includes a case portion 32, a circuit board 34, a connecting member 36, and a mounting unit 38. The case portion 32 is configured by, for example, combining a plurality of members so as to form the cavity portion 32a therein. In the present embodiment, the circuit board 34 is disposed in the cavity portion 32a and is fixed to the case portion 32. The casing portion 32 is configured to be fixed to the power tool body 10 (see Fig. 1). The case portion 32 is made of, for example, a resin.

In the third drawing, the one end portion of the wire main body 16, the connecting member 36, and the mounting unit 38 are viewed from the direction indicated by the arrow A in Fig. 2 . Fig. 4 is a sectional view taken along line IV-IV of Fig. 3. In addition, the fifth The figure shows the connection member 36 and the disassembled attachment unit 38. Further, in Fig. 3, a part of the casing portion 32 of the first connector 18 is indicated by a dashed dotted line.

Referring to FIGS. 3 to 5, the connecting member 36 is T-shaped as a whole. In the present embodiment, the coupling member 36 has the first tubular portion 40, the second tubular portion 42, the pair of sliding portions 44a and 44b, and the locking portion 46. The connecting member 36 is made of, for example, a resin.

The first tubular portion 40 has a disk-shaped bottom wall portion 40a and 40b that are provided to face each other, and a cylindrical side wall portion that is provided to connect the bottom wall portions 40a and 40b. 40c. Referring to Fig. 4, a pair of openings 40d and 40e are formed at positions facing each other in the side wall portion 40c.

Referring to FIGS. 3 to 5 , the second tubular portion 42 has a hollow cylindrical shape with both ends open, and is provided to extend in the radial direction of the first tubular portion 40 . With reference to Fig. 4, in the present embodiment, the inside of the first tubular portion 40 and the inside of the second tubular portion 42 are connected to each other through the opening 40e, and one end portion of the second tubular portion 42 is connected to Side wall portion 40c. Referring to FIGS. 4 and 5, a male screw 42a is formed on the outer peripheral surface of the other end portion of the second tubular portion 42.

Referring to Figures 3 and 5, the sliding portions 44a, 44b are each cylindrical. In the present embodiment, the sliding portion 44a protrudes outward from the bottom wall portion 40a in the axial direction of the first tubular portion 40, and the sliding portion 44b faces the outer side in the axial direction of the first tubular portion 40 from the bottom wall portion 40b. protruding. In the present embodiment, referring to Fig. 3, the sliding portions 44a and 44b are The outer peripheral surface is supported by the casing portion 32 so as to be slidable in the circumferential direction of the sliding portions 44a and 44b. Thereby, the connecting member 36 is supported by the casing portion 32 so as to be swingable in the direction indicated by the arrow B in FIG.

Referring to Figures 3 to 5, the locking portion 46 is cylindrical. The locking portion 46 extends in the axial direction of the first tubular portion 40 in the side wall portion 40c, and connects the bottom wall portion 40a and the bottom wall portion 40b. Further, although the detailed description is omitted, the connecting member 36 can be configured by combining a plurality of members.

Referring to FIGS. 4 and 5, the attachment unit 38 has a bottomed cylindrical fixing member 48, a cylindrical fitting member 50, and a hollow disk-shaped gasket 52. The mounting unit 38 is made of, for example, a resin.

Referring to Fig. 4, the fixing member 48 has a cylindrical side wall portion 48a and a bottom wall portion 48b provided at one end portion of the side wall portion 48a. A female screw 48c is formed on the inner peripheral surface of the other end portion of the side wall portion 48a. In the present embodiment, the female screw 48c is formed to correspond to the male screw 42a of the second cylindrical portion 42. A through hole 48d is formed in the bottom wall portion 48b. That is, the bottom wall portion 48b is annular.

With reference to Fig. 4 and Fig. 5, the fitting member 50 has a cylindrical insertion portion 50a and a flange portion 50b that protrudes outward in the radial direction from one end portion of the insertion portion 50a in the cylindrical direction. The outer diameter of the insertion portion 50a is smaller as it is away from the flange portion 50b in the cylinder axis direction. That is, the insertion portion 50a has a tapered shape.

Referring to Fig. 4, in the present embodiment, the maximum diameter of the insertion portion 50a is smaller than the inner diameter of the side wall portion 48a and the inner diameter of the bottom wall portion 48b. The outer diameter of the flange portion 50b is smaller than the inner diameter of the side wall portion 48a and larger than the diameter of the through hole 48d (the inner diameter of the bottom wall portion 48b). The outer diameter of the washer 52 is smaller than the inner diameter of the side wall portion 48a and larger than the outer diameter of the flange portion 50b. Further, the inner diameter of the washer 52 is smaller than the outer diameter of the flange portion 50b.

Referring to Fig. 4, in the present embodiment, the fitting member 50 and the gasket 52 are sequentially disposed on the bottom wall portion 48b of the fixing member 48. One end portion of the tubular member 30 is positioned on the outer peripheral surface of the fitting member 50. In the present embodiment, in a state where one end portion of the tubular member 30 is positioned in the fitting member 50, the insertion portion 50a is inserted into the through hole 48d of the bottom wall portion 48b. The second tubular portion 42 and the fixing member 48 are connected to each other so that the fitting member 50 whose one end portion of the tubular member 30 is positioned on the outer peripheral surface is interposed. Specifically, the male screw 42a of the second tubular portion 42 is screwed into the female screw 48c of the fixing member 48. Thereby, the fitting member 50 is press-fitted to the side of the bottom wall portion 48b, and one end portion of the tubular member 30 is sandwiched between the fitting member 50 and the bottom wall portion 48b. Therefore, one end portion of the tubular member 30 is fixed to the mounting unit 38. That is, one end portion of the tubular member 30 is fixed to the first connector 18 (see FIG. 2).

The ring 22a is formed by one end portion of the linear member 22. In the present embodiment, the loop 22a is formed by one end portion of the linear member 22 by the swaging member 54. The ring 22a is hooked to the locking portion 46. Thereby, one end portion of the linear member 22 is attached to the locking portion 46. That is, the linear member One end portion of 22 is attached to the first connector 18.

Referring to Figures 3 and 4, the power cords 24a, 24b and the signal lines 26a, 26b extend from the inside of the tubular member 30 through the interior of the mounting unit 38 and the connecting member 36 to the hollow portion 32a of the housing portion 32 ( Refer to Figure 2). Each of the power supply lines 24a and 24b and the signal lines 26a and 26b is connected to the circuit board 34 in the cavity portion 32a (see FIG. 2) (see FIG. 2). Referring to Fig. 2, as described above, the circuit board 34 is fixed to the casing portion 32. Thereby, one end portions of the power supply lines 24a and 24b and the signal lines 26a and 26b are fixed to the first connector 18.

Referring to Fig. 2, the second connector 20 includes a case portion 56, a circuit board 58, and a mounting unit 60. The casing portion 56 is configured by, for example, combining a plurality of members so as to form a cavity portion 56a therein. In the present embodiment, the circuit board 58 is disposed in the cavity portion 56a and is fixed to the case portion 56. The casing portion 56 is configured to be attachable to the battery unit 12 (see Fig. 1).

Fig. 6 is a view showing the casing portion 56 and the disassembled mounting unit 60, and Fig. 7 is a sectional view taken along line VII-VII of Fig. 2; Referring to FIGS. 6 and 7, the casing portion 56 has a main body portion 56b having a substantially rectangular parallelepiped shape, a cylindrical connecting portion 56c, and a cylindrical locking portion 56d. The main body portion 56b and the connecting portion 56c are made of, for example, a resin, and the locking portion 56d is made of, for example, metal.

Referring to Fig. 6, in the present embodiment, a cavity portion 56a is formed in the main body portion 56b. The connecting portion 56c is formed to protrude from the side surface of the main body portion 56b. In the present embodiment, at the joint portion 56c It is formed integrally with the body portion 56b. The cavity portion 56a is connected to the inside of the coupling portion 56c. A male screw 56e is formed on the outer circumferential surface of the coupling portion 56c.

Referring to FIGS. 6 and 7 , a pair of through holes 56 f and 56 g are formed so as to penetrate the connecting portion 56 c in the radial direction and face each other. The locking portion 56d is inserted into the through holes 56f and 56g so as to penetrate the connecting portion 56c in the radial direction. In the present embodiment, the locking portion 56d is fixed to the coupling portion 56c by being pressed into the through holes 56f and 56g, for example.

The mounting unit 60 has a fixing member 62, a fitting member 64, and a washer 66 which are respectively configured to be the same as the fixing member 48, the fitting member 50, and the washer 52 of the mounting unit 38. That is, the mounting unit 60 has the same configuration as the mounting unit 38. Therefore, the detailed description of the mounting unit 60 is omitted.

In the present embodiment, the other end portion of the tubular member 30 is positioned on the outer peripheral surface of the fitting member 64, and the connecting portion is sandwiched between the fitting member 64 and the washer 66. The 56c is coupled to the fixing member 62. Specifically, the male screw 56e of the coupling portion 56c is screwed into the female screw 62a of the fixing member 62. Thereby, the other end portion of the tubular member 30 is sandwiched between the fitting member 64 and the fixing member 62. Therefore, the other end of the tubular member 30 is fixed to the mounting unit 60. That is, the other end portion of the tubular member 30 is fixed to the second connector 20 (see FIG. 2).

The ring 22b is formed by the other end of the linear member 22. In the present embodiment, the ring 22b is formed by the other end portion of the linear member 22 by the swaging member 68. The ring 22b is hooked to the locking portion 56d. Thereby, the other end portion of the linear member 22 is attached to the locking portion 56d. That is, the other end portion of the linear member 22 is attached to the second connector 20.

Referring to Fig. 7, the power supply lines 24a and 24b and the signal lines 26a and 26b extend from the inside of the tubular member 30 through the inside of the mounting unit 60 and the connecting portion 56c to the cavity portion 56a (see Fig. 2). The other end portions of the power supply lines 24a and 24b and the signal lines 26a and 26b are connected to the circuit board 58 in the cavity portion 56a (see FIG. 2) (see FIG. 2). Referring to Fig. 2, as described above, the circuit board 58 is fixed to the casing portion 56. Thereby, the other ends of the power supply lines 24a and 24b and the signal lines 26a and 26b are fixed to the second connector 20. Further, the circuit board 34 and the circuit board 58 are electrically connected by the power supply lines 24a and 24b and the signal lines 26a and 26b.

(size of power cord, etc.)

Referring to Fig. 1, in the present embodiment, the length of each of the power supply wires 24a and 24b is larger than the length of either of the linear member 22 and the tubular member 30. The respective lengths of the power cords 24a, 24b are greater than the maximum length of the tubular member 30. The respective lengths of the power lines 24a, 24b are greater than the length of either of the signal lines 26a, 26b. The length of the linear member 22 is smaller than the maximum length of the tubular member 30. The length of the linear member 22 is smaller than the length of either of the signal lines 26a, 26b. That is, the length of each of the signal lines 26a, 26b is a linear member. 22 is longer. The respective lengths of the signal lines 26a, 26b are smaller than the maximum length of the tubular member 30.

Further, in the present embodiment, the length of the linear member 22 is the same as that of the first connector 18 (the locking portion 46) when the linear member 22 is stretched by the first connector 18 and the second connector 20. The length of the linear member 22 from the contact portion to the contact portion with the second connector 20 (locking portion 56d). Further, in the present embodiment, when the linear member 22 is stretched by the first connector 18 and the second connector 20, the ring 22a comes into contact with the locking portion 46, and the ring 22b comes into contact with the locking portion 56d.

In the present embodiment, the length of the power supply line 24a is the length of the power supply line 24a from the connection portion with the first connector 18 (circuit board 34) to the connection portion with the second connector 20 (circuit board 58). . Similarly, the length of the power supply line 24b is the length of the power supply line 24b from the connection portion with the first connector 18 (circuit board 34) to the connection portion with the second connector 20 (circuit board 58). Further, the length of the signal line 26a is the length of the signal line 26a from the connection portion with the first connector 18 (circuit board 34) to the connection portion with the second connector 20 (circuit board 58). Similarly, the length of the signal line 26b is the length of the signal line 26b from the connection portion with the first connector 18 (circuit board 34) to the connection portion with the second connector 20 (circuit board 58).

In the present embodiment, the length of the tubular member 30 is the length of the tubular member 30 from the connection portion with the first connector 18 (mounting unit 38) to the connection portion with the second connector 20 (mounting unit 60). . In addition, the maximum length of the tubular member 30 is the tensile tubular member 30. At the time, the length of the tubular member 30 immediately before the tubular member 30 is cut or just before the tubular member 30 is plastically deformed.

Further, as described above, in the present embodiment, the lengths of the power supply lines 24a and 24b are larger than the lengths of any of the linear member 22, the signal lines 26a and 26b, and the tubular member 30. In the present embodiment, each of the power supply lines 24a and 24b has folded-back portions 24c and 24d which are folded back at least at two locations in the tubular member 30 as shown in Fig. 8. Thereby, the power supply wires 24a and 24b can be easily accommodated in the tubular member 30. Further, in the present embodiment, the power supply lines 24a and 24b have a center portion (a position indicated by a one-dot chain line in FIG. 8) in the longitudinal direction of the tubular member 30, and are closer to the second connector 20 side. The folded portions 24c and 24d.

Here, the folded-back portions 24c and 24d mean the folded-back portions on the one side in the longitudinal direction of the power supply lines 24a and 24b from the folded portions of the plurality of portions when the power supply lines 24a and 24b are continuously folded back in a plurality of portions. The range up to the folded-back portion on the other side in the longitudinal direction of the power supply lines 24a and 24b.

The signal lines 26a and 26b and the power lines 24a and 24b may be connected by a fixture 70. In Fig. 9, an example in which the signal line 26a and the power source line 24a are coupled by a fixture 70 is shown.

In the following, the case where the signal line 26a and the power line 24a are connected by the fixing device 70 will be described. However, the signal line 26b and the power line 24b are connected by the fixing device 70 in the same manner as the signal line 26a and the power line 24a. can. That is, the following components are not limited to the signal line. 26a and power line 24a can also be applied to signal line 26b and power line 24b.

Referring to Fig. 9, the signal line 26a is a loop portion 26c having a part of the longitudinal direction bent in a loop shape. The base end side of the signal line 26a of the loop portion 26c of the signal line 26a and the power source line 24a are fixed by the fixture 70. That is, the inside of the loop portion 26c is coupled to the power source line 24a by the fixture 70. The fixture 70 is, for example, a resin bundling member for concentrating the wires to each other.

Further, the fixture 70 may be any member as long as it can connect the signal line 26a to the power source line 24a. Further, the material of the fixture 70 may be other than the resin.

As described above, the signal line 26a and the power line 24a are coupled by the fixture 70, whereby the length of the signal line 26a between the fixture 70 and the second connector 20 is compared with the first connector 18 and the second connector. The overall length of the signal line 26a between the devices 20 is smaller. Accordingly, when a longitudinal impact is applied to the connecting wire 14, the amount of extension of the portion until the portion between the fixture 70 and the second connector 20 of the signal line 26a is cut is compared to the signal line 26a. The amount of extension of the signal line 26a as a whole is smaller. Therefore, when a longitudinal impact is applied to the connecting wire 14, the signal line 26a can be easily cut as compared with a configuration in which the signal line 26a is not connected to the power supply line 24a by the fixing tool 70. Thereby, after the longitudinal direction impact is applied to the connection wire 14, and the linear member 22 is cut, the signal line 26a can be cut before the tubular member 30 and the power supply wire 24a apply a large tensile force. Therefore, it is possible to more reliably prevent the power supply line 24a from being cut.

Further, as described above, the inside of the loop portion 26c of the signal line 26a is connected to the power source line 24a by the fixture 70, whereby the power source line 24a can be more reliably fixed to the signal line 26a. Thereby, when a shock in the longitudinal direction is applied to the connecting wire 14, the signal line 26a can be more easily cut.

In the present embodiment, the signal line 26a and the power source line 24a are connected to the first connector 18 side of the folded portion 24c of the power source line 24a, and are connected by the fixture 70. That is, the power supply line 24a is connected to the signal line 26a by the fixture 70 at a portion between the folded portion 24c and the first connector 18.

Further, the loop portion 26c of the signal line 26a is formed at a position closer to the folded portion 24c of the power source line 24a than the central portion of the tubular member 30. Thereby, the signal line 26a and the power source line 24a are connected by the fixing tool 70 at a position closer to the folded portion 24c of the power source line 24a than the central portion of the tubular member 30.

According to the above configuration, the length of the portion between the fixture 70 including the folded portion 24c and the second connector 20 in the power supply line 24a is such that the component of the length of the folded portion 24c is larger than the corresponding portion of the signal line 26a. length. Thereby, when a longitudinal impact is applied to the connection wire 14, the fixture 70 and the second connector can be made before the power supply wire 24a between the fixture 70 and the second connector 20 generates a large tensile force. The signal line 26a between 20 is cut off. Therefore, it is possible to more reliably prevent the power supply line 24a from being cut.

(Effects of this embodiment)

In the connecting wire 14 of the present embodiment, the lengths of the power supply wires 24a and 24b are larger than the length of the linear member 22 and the length of the tubular member 30. With this configuration, for example, when the power tool body 10 is dropped and the longitudinal direction impact is applied to the connecting wire 14, the tensile force is applied to the linear member 22 and the tubular member 30 before the power supply wires 24a and 24b. Thereby, it is possible to prevent a large tensile force from being applied to the power supply lines 24a and 24b. Therefore, it is possible to prevent the power supply lines 24a, 24b from being cut.

Further, in the present embodiment, the linear member 22 and the power supply lines 24a and 24b are covered by the tubular member 30. According to this configuration, it is possible to prevent the linear member 22 from being entangled with the power supply wires 24a and 24b during use of the electric power tool 100. In addition, it is possible to prevent the tubular member 30 from being entangled with the linear member 22 and the tubular member 30 being entangled with the power supply wires 24a, 24b.

The tubular member 30 is configured to be expandable and contractible in the tube axis direction, and the length of the linear member 22 is smaller than the maximum length of the tubular member 30. According to this configuration, when a longitudinal impact is applied to the connecting wire 14, a large tensile force is first applied to the linear member 22. Thereby, the linear member 22 is cut off before the tubular member 30. In the present embodiment, the linear member 22 is cut between, for example, the swaging member 54 and the swaging member 68. In this manner, the connecting member 14 is configured such that the linear member 22 is cut earlier than the tubular member 30, and when the connecting line 14 is subjected to a longitudinal impact (for example, when the power tool body 10 is dropped), It is possible to suppress the application of a large tensile force to the tubular member 30. In this way, it can be prevented The tubular member 30 is cut. Further, in the connecting wire 14, the length of the power supply wires 24a, 24b is larger than the maximum length of the tubular member 30. With this configuration, after the linear member 22 is cut, for example, in a state where the load of the power tool body 10 causes the tubular member 30 to stretch, it is possible to prevent a large tensile force from being applied to the power supply wires 24a and 24b. Therefore, it is possible to more reliably prevent the power supply lines 24a, 24b from being cut.

The length of each of the signal lines 26a, 26b is greater than the length of the linear member 22 and is smaller than the maximum length of the tubular member 30. According to this configuration, when the linear member 22 is cut by the longitudinal direction impact on the connecting wire 14, a large tensile force is applied to the signal wires 26a and 26b before the tubular member 30. Thereby, for example, when the signal lines 26a and 26b are cut, the transmission and reception of the electric signal cannot be performed between the power tool body 10 and the battery unit 12. At this time, for example, the control unit (not shown) of the electric power tool 100 determines that the electric power tool 100 has failed, and can stop the driving of the electric power tool main body 10. Thus, by intentionally cutting the signal lines 26a, 26b, it is possible to prevent the power tool body 10 from falling behind the use of the power tool body 10.

The tubular member 30 can be constructed by a braid. At this time, the connection line 14 can be made lighter.

The linear member 22 can be made of metal. At this time, it is possible to prevent the small load from causing the linear member 22 to be simply cut.

(Modification)

In the foregoing embodiments, although the use of a braid as a tubular member In the case of 30, other members such as a resin tube may be used as the tubular member 30.

In the above-described embodiment, the case where the connection line 14 has two signal lines 26a and 26b will be described. However, the number of the signal lines may be one or three or more. In addition, the connection line does not have a signal line.

In the above embodiment, the case where the linear member 22 is smaller than the maximum length of the tubular member 30 will be described, but the linear member 22 may be larger than the maximum length of the tubular member 30.

In the above embodiment, the case where the length of the signal lines 26a and 26b is larger than the length of the linear member 22 and smaller than the maximum length of the tubular member 30 will be described. However, the length of the signal lines 26a, 26b may be smaller than the length of the linear member 22. Further, the length of the signal lines 26a, 26b may be larger than the maximum length of the tubular member 30. The lengths of the signal lines 26a and 26b may be different.

In the above-described embodiment, the case where each of the power supply lines 24a and 24b has the folded-back portions 24c and 24d that are folded back at at least two locations in the tubular member 30 will be described. However, the power cords 24a and 24b may not have a folded-back portion. Further, only one of the power supply lines 24a and 24b may have a folded-back portion.

In the above-described embodiment, the case where the folded portions 24c and 24d of the power supply lines 24a and 24b are provided closer to the second connector 20 than the central portion of the tubular member 30 in the longitudinal direction will be described. However, the folded portions 24c, 24d are disposed at the center in the longitudinal direction of the tubular member 30. The part can also be on the side of the first connector 18. Further, one of the folded portions 24c and 24d is provided on the second connector 20 side than the central portion in the longitudinal direction of the tubular member 30, and the other of the folded portions 24c and 24d is disposed in the longitudinal direction of the tubular member 30. The central portion of the central portion can also be on the side of the first connector 18.

In the above embodiment, the case where the power supply line 24a and the signal line 26a are connected to each other by the fixing device 70 is described. However, the power supply line 24a and the signal line 26a are connected to each other at a plurality of locations by the fixing device 70. can. At this time, when a longitudinal impact is applied to the connecting wire 14, the signal line 26a is between the fixtures 70, between the fixture 70 and the first connector 18, and between the fixture 70 and the second connector. The portion where the difference between the length of the signal line 26a and the power source line 24a is the largest between the devices 20 is cut off.

In the above embodiment, the case where the inside of the loop portion 26c of the signal line 26a is connected to the power source line 24a by the fixture 70 will be described. However, the loop portion 26c is not provided on the signal line 26a, and the signal line 26a may be connected to the power source line 24a by the fixture 70.

In the above embodiment, the case where the portion between the folded portion 24c and the first connector 18 of the power supply line 24a is connected to the signal line 26a by the fixing tool 70 will be described. However, the power supply line 24a between the folded portion 24c and the second connector 20 may be coupled to the signal line 26a by the fixture 70. At this time, since the folded portion 24c of the power supply line 24a is located between the first connector 18 and the fixture 70, the signal line 26a is attached to the first connector when a longitudinal impact is applied to the connection line 14. 18 with The fixture 70 is cut between.

In the above embodiment, the case where the signal line 26a and the power source line 24a are connected by the fixture 70 at a position closer to the folded portion 24c of the power source line 24a than the central portion of the tubular member 30 will be described. However, the signal line 26a and the power line 24a may be connected at any position by the fixture 70. Further, from the viewpoint of making the difference in length between the power supply line 24a and the signal line 26a as large as possible, the power supply line 24a is preferably connected to the signal line 26a in addition to the folded-back portion 24c.

In the above embodiment, the case where the signal line 26a and the power source line 24a are coupled by the fixture 70 will be described. However, the signal line 26a and the power source line 24a may be connected by an adhesive or an adhesive tape or the like. That is, the signal line 26a and the power source line 24a may be connected by a configuration other than the fixture 70. Further, the power source line 24a and the signal line 26a may be connected to at least one portion other than the first connector 18 and the second connector 20.

In the above-described embodiment, the case where the linear member 22 is made of metal is described. However, other materials such as nylon may be used as the material of the linear member 22.

In addition, although the detailed description is omitted, the configuration of the first connector is not limited to the above configuration, and may be any configuration that can electrically connect the circuit board to the power tool body. Similarly, the configuration of the second connector is not limited to the above configuration, and may be any configuration that can electrically connect the circuit board to the battery unit.

[Industry use possibility]

The present invention is suitable for use in various connecting wires for connecting a power tool body to a battery unit.

10‧‧‧Power tool body

12‧‧‧ battery unit

12a‧‧‧Battery pack

12b‧‧‧Holding

14‧‧‧Connecting line

16‧‧‧ line ontology

18‧‧‧1st connector

20‧‧‧2nd connector

22‧‧‧Line members

24a‧‧‧Power cord

24b‧‧‧Power cord

26a‧‧‧Signal line

26b‧‧‧Signal line

28‧‧‧Spiral tube

30‧‧‧Tubular components

100‧‧‧Power Tools

Claims (5)

A connecting wire for electrically connecting a power tool main body and a battery unit includes: a first connector attached to the electric tool body; and a second connector attached to the battery unit; and a linear member; Connecting the first connector and the second connector; and the power cord connects the first connector and the second connector, and flows a power supply current supplied from the battery unit to the power tool body; and a tubular a member connecting the first connector and the second connector, and covering the linear member and the power cord; the length of the power cord is longer than a length of the linear member and a length of the tubular member . The connecting wire according to claim 1, wherein the tubular member is configured to be expandable and contractible in a tube axis direction, and a length of the linear member is smaller than a maximum length of the tubular member, and a length of the power cord is It is larger than the maximum length of the aforementioned tubular member. The connection line according to claim 2, further comprising: a signal line that connects the first connector and the second connector, and transmits an electrical signal between the power tool body and the battery unit; The signal line is covered by the tubular member between the first connector and the second connector, and the length of the signal line is larger than the length of the linear member and larger than the maximum of the tubular member. The length is smaller. The connecting wire according to claim 3, wherein the signal line and the power source line are connected to at least one of the first connector and the second connector. A power tool comprising a power tool body and a connecting wire according to any one of claims 1 to 4.