Work machine

Abstract

The present invention relates to a work machine, and provides a technology capable of suppressing a situation in which a hand of a user discharges electricity due to static electricity without connecting a control unit to a flashlight of the user. A work machine disclosed in the present specification may comprise: a gripping member that is gripped by a user with one hand; a protective member which at least partially covers the surface of the gripping member and is made of a conductive material; an operation member on which the user can operate with the one hand; a detection sensor configured to detect an operation performed on the operation member; and a control unit. The protection member may be provided with a contact portion that enters the inside of the gripping member. The detection sensor may be provided with: a conductive member electrically connected to the control unit; and a sensor housing which holds the conductive member and is made of an insulating material. The abutment portion may be in abutment with the sensor housing.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a working machine. Background Art

[0002] The working machine disclosed in the specification of Chinese invention patent No. 106284150 comprises: a gripping member, which is gripped by a user with one hand; a protective member, which at least partially covers the surface of the gripping member and is made of a conductive material; an operating member, which the user can operate with the one hand; a detection sensor, which is configured to detect the operation of the operating member; an air supply path; an air supply fan, which is arranged in the air supply path; an electric motor, which rotates the air supply fan; a conductive ring, which surrounds the outer surface of the air supply path; and a control unit, which controls the operation of the electric motor. The detection sensor comprises: a conductive component, which is electrically connected to the control unit; and a sensor housing, which holds the conductive component and is made of an insulating material. The protective member is electrically connected to the control unit and the conductive ring. In the working machine, the protective member made of a conductive material contacts the user's hand, and the protective member is electrically connected to the control unit and the conductive ring. Therefore, even if static electricity is generated during the use of the working machine, the charge will quickly move to the user's hand via the protective member. By setting it as such a structure, it is possible to suppress the situation where static electricity is accumulated in the working machine and discharged to the hand of the user. In addition, in this working machine, the static electricity charge generated in the air supply path can be collected using the conductive ring. Summary of the invention

[0003] Problem that the invention aims to solve

[0004] Normally, the control unit of the working machine is electrically connected to the power supply that supplies power to the working machine. When the protective member that contacts the user's hand is made of a conductive material and is electrically connected to the control unit, as in the working machine described in the specification of Chinese Invention Patent No. 106284150, the user's hand may be electrically connected to the power supply that supplies power to the working machine, causing an electric shock. This specification provides a technology that can suppress discharge caused by static electricity in the user's hand without electrically connecting the control unit to the user's hand.

[0005] In addition, in the working machine of the Chinese invention patent specification No. 106284150, a conductive ring is used to collect static electricity charges generated in the air supply duct. In this specification, a technology capable of collecting static electricity charges generated in the air supply duct with a simpler structure is also provided.

[0006] Solutions for solving problems

[0007] The working machine disclosed in this specification may include: a gripping member, which is gripped by a user with one hand; a protective member, which at least partially covers the surface of the gripping member and is made of a conductive material; an operating member, which the user can operate with the one hand; a detection sensor, which is configured to detect the operation of the operating member; and a control unit. The protective member may include an abutment portion that enters into the interior of the gripping member. The detection sensor may include: a conductive component that is electrically connected to the control unit; and a sensor housing that holds the conductive component and is made of an insulating material. The abutment portion may abut against the sensor housing.

[0008] According to the above structure, the protective member in contact with the user's hand is made of a conductive material, and the abutting portion of the protective member abuts against the sensor housing. Therefore, when static electricity is accumulated in the working machine, discharge occurs between the conductive component of the detection sensor and the abutting portion of the protective member, and the charge moves from the protective member to the user's hand. As a result, it is possible to suppress the discharge caused by static electricity in the user's hand without connecting the control unit to the user's hand. In addition, in the above structure, since the abutting portion abuts against the sensor housing, the distance between the abutting portion and the conductive component is not easily deviated, and a stable discharge characteristic can be achieved between the abutting portion and the conductive component.

[0009] Another working machine disclosed in this specification may include: a gripping member, which is gripped by a user with one hand; a protective member, which at least partially covers the surface of the gripping member and is made of a conductive material; an air supply path; an air supply fan, which is arranged in the air supply path; an electric motor, which rotates the air supply fan; and a wiring, which is connected to the electric motor and extends 90° or more in the circumferential direction along the outer surface of the air supply path. Alternatively, the static electricity generated in the air supply path may be collected by the wiring and moved from the protective member to the one hand of the user.

[0010] According to the above structure, it is possible to collect the static electricity generated in the air supply path by using wiring connected to the electric motor without using special components such as conductive rings. In addition, in this structure, it can be a structure in which the wiring extending in the circumferential direction along the outer surface of the air supply path is electrically connected to the protective component, or it can be a structure in which there is an insulating portion between the wiring extending in the circumferential direction along the outer surface of the air supply path and the protective component and discharge occurs at the insulating portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a perspective view showing the overall appearance of the hair dryer 10 according to the embodiment.

[0012] Figure 2This is a perspective view of the blower unit 16 of the embodiment as viewed from the upper left front.

[0013] Figure 3 1 is a longitudinal sectional view of the vicinity of the housing 28 of the blower unit 16 of the embodiment.

[0014] Figure 4 This is a perspective view of the vicinity of the handle unit 38 of the blower unit 16 of the embodiment as viewed from the upper left rear.

[0015] Figure 5 This is a perspective view of the internal structure of the handle unit 38 of the blower unit 16 of the embodiment as viewed from the upper right front.

[0016] Figure 6 1 is a transverse cross-sectional view of the handle unit 38 of the blower unit 16 according to the embodiment.

[0017] Figure 7 This is a perspective view of the internal structure of the housing 28 of the blower unit 16 of the embodiment as viewed from the lower left rear side. DETAILED DESCRIPTION

[0018] The following is a detailed description of representative and non-limiting specific examples of the present invention with reference to the accompanying drawings. This detailed description is intended to simply show the details of the preferred examples for implementing the present invention to those skilled in the art, and is not intended to limit the scope of the present invention. In addition, in order to provide a further improved working machine, the disclosed additional features and technical solutions can be used separately from other features and technical solutions or used together with other features and technical solutions.

[0019] In addition, the combination of features and processes disclosed in the following detailed description is not necessary in the broadest sense when implementing the present invention, and is only recorded for the purpose of particularly illustrating the representative specific examples of the present invention. Furthermore, when providing additional and useful embodiments of the present invention, the various features of the following representative specific examples and the various features recorded in the claims do not necessarily have to be combined as in the specific examples recorded here or in the order of enumeration.

[0020] All features described in this specification and / or claims are intended to be disclosed separately and independently of the structures of features described in the embodiments and / or claims as limitations on the disclosure of the original application and specific matters described in the claims. Furthermore, all numerical ranges and records related to organizations or groups are intended to disclose the above-mentioned intermediate structures as limitations on the disclosure of the original application and specific matters described in the claims.

[0021] In one or more embodiments, the working machine may include: a gripping member that is gripped by a user with one hand; a protective member that at least partially covers the surface of the gripping member and is made of a conductive material; an operating member that the user can operate with the one hand; a detection sensor that is configured to detect an operation performed on the operating member; and a control unit. The protective member may include an abutment portion that enters into the interior of the gripping member. The detection sensor may include: a conductive component that is electrically connected to the control unit; and a sensor housing that holds the conductive component and is made of an insulating material. The abutment portion may abut against the sensor housing.

[0022] In one or more embodiments, the working machine may be configured to be used in a state where the working machine is held by the user and is lifted off the ground.

[0023] In the above-mentioned working machine, the charge caused by static electricity generated during the use of the working machine is not easy to move to the ground, so the charge caused by static electricity is easy to accumulate inside the working machine. According to the above-mentioned structure, in such a working machine that is easy to accumulate static electricity, it is possible to suppress the discharge caused by static electricity in the user's hand without connecting the control unit to the user's flashlight.

[0024] In one or more embodiments, the working machine may further include: an air supply passage; an air supply fan disposed in the air supply passage; and a prime mover that rotates the air supply fan. The control unit may be configured to control the operation of the prime mover.

[0025] In the above-mentioned working machine, the charge caused by the static electricity originally carried by the particles in the air flowing inside the working machine and the charge caused by the static electricity generated by the friction between the particles and the components of the working machine are easily accumulated inside the working machine. According to the above-mentioned structure, in such a working machine that is easy to accumulate static electricity, it is possible to suppress the discharge caused by static electricity in the user's hand without connecting the control unit to the user's flashlight.

[0026] In one or more embodiments, the wiring connecting the control unit and the detection sensor may extend 90° or more in the circumferential direction along the outer surface of the air supply passage.

[0027] According to the above configuration, it is possible to collect static electricity charges generated in the air supply path by using wiring that connects the control unit and the detection sensor without using a special member such as a conductive ring.

[0028] In one or more embodiments, the wiring connecting the control unit and the power supply may extend 90° or more in the circumferential direction along the outer surface of the air supply passage.

[0029] According to the above configuration, it is possible to collect static electricity charges generated in the air supply path by using wiring that connects the control unit and the power source without using a special member such as a conductive ring.

[0030] In one or more embodiments, the prime mover may be an electric motor. The control unit may be configured to control the operation of the electric motor by controlling the power supplied to the electric motor.

[0031] In a working machine using an electric motor as a prime mover, a relatively high power is supplied from a power source, so it is necessary to reliably prevent the user from getting an electric shock. According to the above structure, since the control unit is not connected to the user's hand, the user can be reliably prevented from getting an electric shock, and discharge caused by static electricity in the user's hand can be suppressed.

[0032] In one or more embodiments, the wiring connecting the control unit and the electric motor may extend 90° or more in the circumferential direction along the outer surface of the air supply passage.

[0033] According to the above configuration, it is possible to collect static electricity charges generated in the air supply passage by using wiring connecting the control unit and the electric motor without using a special member such as a conductive ring.

[0034] In one or more embodiments, the working machine may also include: a gripping member that is gripped by a user with one hand; a protective member that at least partially covers the surface of the gripping member and is made of a conductive material; an air supply path; an air supply fan that is disposed in the air supply path; an electric motor that rotates the air supply fan; and a wiring that is connected to the electric motor and extends 90° or more in the circumferential direction along the outer surface of the air supply path. Alternatively, the static electricity generated in the air supply path may be collected by the wiring and moved from the protective member to the one hand of the user.

[0035] (Example)

[0036] like Figure 1 As shown, the hair dryer 10 includes a backpack unit 12, a battery unit 14, and a hair dryer unit 16. The backpack unit 12 includes a backpack frame 18, a pair of shoulder straps 20 mounted on the backpack frame 18, and a waist belt 22 mounted on the backpack frame 18. The user can hold the backpack unit 12 in a state where the backpack unit 12 is carried on the user's back by hanging the pair of shoulder straps 20 on the shoulders and wrapping the waist belt 22 around the waist.

[0037] The battery unit 14 is mounted on the carrying frame 18 in a detachable manner. The battery unit 14 accommodates a plurality of battery cells (not shown). The battery unit 14 includes a power button 24, a charging connector (not shown), and a discharge cable 26. The plurality of battery cells can be charged from an external power source (not shown) by connecting a charging cable (not shown) extending from the external power source (not shown) to the charging connector. The power button 24 switches the power of the battery unit 14 on / off. The plurality of battery cells can be discharged via the discharge cable 26 when the power of the battery unit 14 is turned on.

[0038] like Figure 2 As shown, the blower unit 16 includes a housing 28 and a power cable 30. The housing 28 includes: a cylindrical portion 28a, which is formed into a substantially cylindrical shape; an expanded diameter portion 28b, which is connected to one end portion of the central axial direction of the cylindrical portion 28a and has a shape that expands in diameter as it moves away from the cylindrical portion 28a; a frame mounting portion 28c, which protrudes outward from the outer surface of the cylindrical portion 28a; a cable retaining portion 28d, which protrudes outward from the outer surface of the cylindrical portion 28a and the outer surface of the expanded diameter portion 28b; and a control unit storage portion 28e, which protrudes outward from the outer surface of the cylindrical portion 28a. The housing 28 can be mounted relative to the backpack frame 18 (see Figure 1 The power cable 30 extends from the cable holding portion 28d and is connected to the discharge cable 26 (see Figure 1 ) is connected. The hair dryer unit 16 is connected by the battery unit 14 (refer to Figure 1 ) is operated by the power supplied via the discharge cable 26 and the power cable 30. In addition, in the following description, the direction in which the central axis of the cylindrical portion 28a of the housing 28 extends is referred to as the front-to-back direction, the direction in which the enlarged diameter portion 28b is observed from the cylindrical portion 28a is referred to as the rear direction, and the direction opposite to the rear direction is referred to as the front direction. In addition, the direction orthogonal to the front-to-back direction and the direction in which the cable holding portion 28d is observed from the central axis of the cylindrical portion 28a is referred to as the upper direction, and the direction opposite to the upper direction is referred to as the lower direction. In addition, the direction orthogonal to the front-to-back direction and the upper-lower direction is referred to as the left-right direction. The frame mounting portion 28c is arranged on the outer surface of the left side of the cylindrical portion 28a, the cable holding portion 28d is arranged on the outer surface of the upper side of the cylindrical portion 28a and the enlarged diameter portion 28b, and the control unit storage portion 28e is arranged on the outer surface of the lower side of the cylindrical portion 28a. In addition, the power cable 30 extends from the rear surface of the cable holding portion 28d toward the rear.

[0039] The hair dryer unit 16 also includes a bellows 32, a straight tube 34, a top nozzle 36, a handle unit 38, and a signal cable 40. The bellows 32 is made of an insulating material (e.g., an elastic resin). The straight tube 34 and the top nozzle 36 are made of an insulating material (e.g., plastic). The bellows 32 connects the front of the cylindrical portion 28a of the housing 28 and the rear of the straight tube 34. The top nozzle 36 is mounted on the front of the straight tube 34 and has a spray port 36a at the top. The handle unit 38 includes a mounting portion 38a, a handle portion 38b, and a top portion 38c. The mounting portion 38a is mounted on the straight tube 34 in a manner surrounding the outer periphery of the straight tube 34. The handle portion 38b extends from the upper portion of the mounting portion 38a toward the front and upper portion. The top portion 38c extends from the upper end of the handle portion 38b toward the front. The signal cable 40 extends forward from the front surface of the cable holding portion 28d of the housing 28 and is connected to the rear surface of the upper portion of the mounting portion 38a of the handle unit 38. The user can adjust the direction toward the discharge port 36a of the tip nozzle 36 by adjusting the posture of the straight tube 34 while holding the handle portion 38b.

[0040] like Figure 3 As shown, the hair dryer unit 16 also includes an air intake cover 42, a soundproofing member 44, a motor housing 46, an air supply pipe 48, an air supply fan 50, an electric motor 52, a diffusion cone 54 and a control unit 56. The air intake cover 42, the motor housing 46, the air supply pipe 48, the air supply fan 50 and the diffusion cone 54 are made of insulating materials (such as plastic). An air intake passage portion 28f is formed inside the enlarged diameter portion 28b of the housing 28. The air intake passage portion 28f has a shape that expands from the front toward the rear. An air intake port 28g is formed at the rear end of the air intake passage portion 28f. The air intake cover 42 is formed in a lattice shape having walls extending in the radial and circumferential directions. The air intake cover 42 is installed in a manner that covers the air intake port 28g of the housing 28. The soundproofing member 44 is attached to the inner surface of the air intake passage portion 28f.

[0041] The motor case 46 is accommodated in the cylindrical portion 28a of the housing 28. The air supply pipe 48 is held by the housing 28 so as to protrude forward from the front end of the cylindrical portion 28a at a position forward of the motor case 46. The portion of the air supply pipe 48 protruding from the housing 28 is covered by the bellows 32.

[0042] The motor housing 46 includes an outer housing 46a having a substantially cylindrical shape, an inner housing 46b having a substantially cylindrical shape disposed inside the outer housing 46a, and a stationary blade portion 46c connecting the outer housing 46a and the inner housing 46b. The central axis of the outer housing 46a and the central axis of the inner housing 46b are both coaxial with the central axis of the cylindrical portion 28a. The inner housing 46b has a smaller diameter than the outer housing 46a, and is shorter in the direction of the central axis than the outer housing 46a. The diffusion cone 54 is mounted on the front end of the inner housing 46b and is configured to protrude forward from the front end of the outer housing 46a. The front portion of the diffusion cone 54 is disposed inside the air supply duct 48.

[0043] The air supply fan 50 is arranged inside the outer shell 46a at a position closer to the rear side than the inner shell 46b. The electric motor 52 is housed inside the inner shell 46b. In the present embodiment, the electric motor 52 is, for example, a brushless motor. The electric motor 52 includes a stator 52b wound with a coil 52a, a rotor 52d arranged inside the stator 52b and having a permanent magnet 52c, a sensor substrate 52f on which a Hall sensor 52e for detecting the magnetism of the permanent magnet 52c is mounted, and an output shaft 52g fixed to the rotor 52d and extending in the front-to-back direction. The air supply fan 50 is fixed to the rear end of the output shaft 52g. Therefore, the output shaft 52g rotates under the drive of the electric motor 52, thereby rotating the air supply fan 50.

[0044] When the air supply fan 50 rotates, the air outside the blower unit 16 is sucked into the air inlet 28g through the air intake cover 42. The air sucked from the air inlet 28g flows into the inside of the motor housing 46 through the air intake passage portion 28f. Then, the air passes through the air supply fan 50 and flows through the space between the outer housing 46a and the inner housing 46b. After being rectified by the stationary blade portion 46c, the air flows out of the motor housing 46 and flows into the inside of the air supply duct 48. Then, the air passes through the air supply fan 50 and flows into the air supply duct 48. Figure 2 The interior of the bellows 32 and the straight tube 34 shown are then ejected from the ejection port 36 a at the tip of the tip nozzle 36 .

[0045] like Figure 3 As shown, the control unit 56 is housed inside the control unit housing portion 28e of the housing 28. The control unit 56 includes a control circuit substrate 56a and a circuit substrate housing 56b that houses the control circuit substrate 56a. The control circuit substrate 56a includes a microcomputer (not shown) and an inverter circuit (not shown), etc. The microcomputer includes a CPU, a ROM, a RAM, etc., and controls the overall operation of the hair dryer unit 16. The inverter circuit controls the operation of the electric motor 52 by controlling the power supplied to the electric motor 52. The control circuit substrate 56a and the electric motor 52 are electrically connected via a motor wiring 52h, and the motor wiring 52h passes through a wiring space 46d (refer to Figure 7 ). In the present embodiment, the motor wiring 52h includes both wiring (not shown) connected to the coil 52a and wiring (not shown) connected to the sensor substrate 52f. In addition, the electric motor 52 is a motor other than a brushless motor (for example, a brushed motor), and in the absence of the sensor substrate 52f, the motor wiring 52h only includes wiring (not shown) connected to the coil 52a. In addition, the power wiring 30a extending from the inside of the power cable 30 is electrically connected to the control circuit substrate 56a. In addition, a cooling opening 46e is formed at the lower portion of the outer shell 46a, and a portion of the circuit substrate housing 56b is exposed to the inside of the outer shell 46a via the cooling opening 46e. Therefore, when the air supply fan 50 rotates, the control unit 56 is cooled by air flowing through the space between the outer shell 46a and the inner shell 46b.

[0046] like Figure 4 As shown, the handle unit 38 includes a right handle housing 38d and a left handle housing 38e. The right handle housing 38d and the left handle housing 38e are made of an insulating material (e.g., plastic). The right handle housing 38d defines the outer shape of the right half of the mounting portion 38a, the handle portion 38b, and the top portion 38c. The left handle housing 38e defines the outer shape of the left half of the mounting portion 38a, the handle portion 38b, and the top portion 38c.

[0047] The handle portion 38b is provided with a trigger lever 58 disposed on the front surface of the upper portion of the handle portion 38b. In addition, the top portion 38c is provided with a control lever 60 disposed on the left surface of the top portion 38c, a first display operation panel 62 disposed on the rear surface of the top portion 38c, and a second display operation panel 64 disposed on the upper surface of the top portion 38c. The first display operation panel 62 includes a power button 62a, a status display lamp 62b, a circuit substrate (not shown), and a panel housing 62c. The power button 62a switches the on / off state of the power of the blower unit 16. The status display lamp 62b informs the user of the on / off state of the power of the blower unit 16, etc. The panel housing 62c is made of an insulating material (such as plastic) and accommodates the power button 62a, the status display lamp 62b, and the circuit substrate. The circuit substrate of the first display operation panel 62 is electrically connected to the control circuit substrate 56a of the control unit 56 via a signal wiring 62d. The second display operation panel 64 includes a battery remaining display button 64a, a battery remaining display light 64b, a circuit substrate (not shown), and a panel housing 64c. The battery remaining display button 64a switches the battery remaining display light 64b on / off. The battery remaining display light 64b reports the battery remaining amount of the battery unit 14 to the user. The panel housing 64c is made of an insulating material (e.g., plastic) and houses the battery remaining display button 64a, the battery remaining display light 64b, and the circuit substrate. The circuit substrate of the second display operation panel 64 is electrically connected to the control circuit substrate 56a of the control unit 56 via the signal wiring 64d. The signal wirings 62d and 64d extend from the handle unit 38 to the housing 28 through the interior of the signal cable 40.

[0048] like Figure 5As shown, the trigger lever 58 is supported by a boss 38f extending to the right from the left handle housing 38e so as to be rotatable. The trigger lever 58 is made of an insulating material (e.g., plastic). The trigger lever 58 includes an operating portion 58a, a first detection portion 58b, a second detection portion 58c, and an engaging portion 58d. The trigger lever 58 is urged by a torsion spring 66 in a rotation direction that causes the operating portion 58a to face forward. A first trigger switch 68 is accommodated inside the handle portion 38b. The first trigger switch 68 includes a switch lever 68a, a switch button 68b, and a switch housing 68c. The first trigger switch 68 outputs an off signal when the switch lever 68a is away from the switch button 68b, and outputs an on signal when the switch lever 68a abuts against the switch button 68b. The switch housing 68c is made of an insulating material (e.g., plastic) and holds the switch lever 68a and the switch button 68b. The switch rod 68a and the switch button 68b are both conductive components, and are electrically connected to the control circuit substrate 56a of the control unit 56 via the signal wiring 68d. The second trigger switch 70 is housed inside the top end portion 38c. The second trigger switch 70 includes a switch button 70a and a switch housing 70b. The second trigger switch 70 outputs a signal indicating the amount of depression of the switch button 70a. The switch housing 70b is made of an insulating material (e.g., plastic) and holds the switch button 70a. The switch button 70a is a conductive component, and is electrically connected to the control circuit substrate 56a of the control unit 56 via the signal wiring 70c. The signal wirings 68d and 70c pass through the signal cable 40 (see Figure 4 ) extends from the interior of the handle unit 38 to the housing 28.

[0049] The operating portion 58a is arranged outside the handle portion 38b and receives a pressing operation from the user. The first detection portion 58b is arranged opposite to the switch rod 68a of the first trigger switch 68. When the pressing amount of the operating portion 58a is less than a predetermined amount, the first detection portion 58b is away from the switch rod 68a. When the pressing amount of the operating portion 58a is greater than a predetermined amount, the first detection portion 58b abuts against the switch rod 68a, causing the switch rod 68a to abut against the switch button 68b. The second detection portion 58c is arranged opposite to the switch button 70a of the second trigger switch 70. When the operating portion 58a is not pressed, the second detection portion 58c is away from the switch button 70a. When the operating portion 58a is pressed, the second detection portion 58c abuts against the switch button 70a, causing the switch button 70a to be pressed. Therefore, the first trigger switch 68 can detect whether the trigger lever 58 is pushed in, and the second trigger switch 70 can detect the amount by which the trigger lever 58 is pushed in.

[0050] The engaging portion 58d is fixed to the control rod 60 (see Figure 4) is arranged opposite to the engaging piece 60a of the lever 60. The lever 60 receives the rotation operation from the user and maintains the rotation angle after the user's operation. When the lever 60 is rotated, the engaging portion 58d is pushed upward, so the trigger lever 58 rotates in the same manner as when the operating portion 58a is pressed backward. The rotation angle of the lever 60 remains unchanged even after the user releases the lever 60, so by rotating the lever 60, the trigger lever 58 can be maintained in the same state as when the operating portion 58a is pressed in by a predetermined amount.

[0051] like Figure 4 As shown, a front side protection member 72 and a rear side protection member 74 are installed on the outer surface of the handle portion 38b. The front side protection member 72 and the rear side protection member 74 are made of a conductive material such as a conductive elastomer. The front side protection member 72 covers the front surface of the handle portion 38b, and the rear side protection member 74 covers the rear surface of the handle portion 38b. In addition, in this embodiment, the surface of the handle portion 38b is partially exposed between the front side protection member 72 and the rear side protection member 74, but the surface of the handle portion 38b can also be completely covered by the front side protection member 72 and the rear side protection member 74.

[0052] like Figure 6 As shown in FIG. 1 , a through hole 38g is formed in the right handle housing 38d of the handle portion 38b. In addition, a contact portion 72a is formed in the front side protection member 72 so as to penetrate through the through hole 38g and enter the interior of the handle portion 38b. The top end of the contact portion 72a contacts the switch housing 68c of the first trigger switch 68.

[0053] like Figure 7 As shown, inside the housing 28, the power wiring 30a extending from the power cable 30 extends from the cable holding portion 28d above the housing 46a along the outer surface of the left side of the housing 46a to the control unit 56 below the housing 46a. In addition, inside the housing 28, the signal wirings 62d, 64d, 68d, and 70c extending from the signal cable 40 extend from the cable holding portion 28d above the housing 46a along the outer surface of the left side of the housing 46a to the control unit 56 below the housing 46a. Furthermore, inside the housing 28, the motor wiring 52h extending from the electric motor 52 extends from the wiring space 46d of the stator blade portion 46c along the outer surface of the left side of the housing 46a to the upper part of the housing 46a, and then extends along the outer surface of the left side of the housing 46a to the lower part of the housing 46a, and is connected to the control unit 56.

[0054] When the hair dryer 10 is used to blow air, the electric charge caused by the static electricity originally carried by the particles in the air flowing inside the hair dryer 10 and the electric charge caused by the static electricity generated by the friction between the particles and the components of the hair dryer 10 are accumulated in the motor housing 46. The electric charge caused by the static electricity is collected by the power wiring 30a, the signal wiring 62d, 64d, 68d, 70c and the motor wiring 52h extending along the outer surface of the outer shell 46a. The electric charge caused by the static electricity increases the potential of the first display operation panel 62, the second display operation panel 64, the first trigger switch 68 and the second trigger switch 70 of the handle unit 38 connected to the signal wiring 62d, 64d, 68d, 70c. In this embodiment, the contact portion 72a of the front side protection member 72 that contacts the user's hand contacts the switch housing 68c of the first trigger switch 68. Therefore, discharge occurs from the switch lever 68a and the switch button 68b of the first trigger switch 68 to the contact portion 72a of the front protection member 72, and the charge caused by static electricity moves from the front protection member 72 to the user's hand. At this time, the discharge occurs not on the surface of the user's hand but inside the handle unit 38, so the static electricity accumulated inside the hair dryer 10 can be discharged to the outside without causing discomfort to the user.

[0055] In addition, in order to collect the electric charge accumulated in the motor housing 46, any one of the power wiring 30a, the signal wiring 62d, 64d, 68d, 70c and the motor wiring 52h only needs to extend 90° or more in the circumferential direction along the outer surface of the outer shell 46a. The power wiring 30a, the signal wiring 62d, 64d, 68d, 70c and / or the motor wiring 52h may extend within a range of, for example, 90° or more, or within a range of, for example, 120° or more, or within a range of, for example, 180° or more. The larger the range over which the power wiring 30a, the signal wiring 62d, 64d, 68d, 70c and / or the motor wiring 52h extend, the more reliably the electric charge accumulated in the motor housing 46 can be collected.

[0056] (Variation Example)

[0057] In the above-mentioned embodiment, the working machine is described as a structure in which the blower 10 is used. However, the working machine may be a vacuum cleaner, a dust collector, a vacuum blower, or the like.

[0058] In the above-mentioned embodiment, the hair dryer 10 is described as a structure of a backpack hair dryer. In other embodiments, the hair dryer 10 may also be a hair dryer other than a backpack hair dryer. For example, the hair dryer 10 may also be a handheld hair dryer, etc.

[0059] In the above-mentioned embodiment, the power source of the hair dryer 10 is the battery unit 14 and the power is supplied from the battery unit 14 to the hair dryer unit 16. Different from this, the power source of the hair dryer 10 may not be an external power source (not shown) worn by the user, and may be a structure in which the power is supplied from the external power source to the hair dryer unit 16. Alternatively, the power source of the hair dryer 10 may be a battery pack (not shown) that can be detached from the hair dryer unit 16, and may be a structure in which the power is supplied from the battery pack to the hair dryer unit 16.

[0060] In the above embodiment, the prime mover of the hair dryer 10 is the electric motor 52 and the blower fan 50 is rotated by the power of the electric motor 52. Alternatively, the prime mover of the hair dryer 10 is an internal combustion engine (not shown) and the blower fan 50 is rotated by the power of the internal combustion engine.

[0061] In the above-mentioned embodiment, the electric motor 52 is described as a brushless motor. However, the electric motor 52 may be a brushless motor or another type of motor.

[0062] In the above-mentioned embodiment, the structure in which the contact portion 72a of the front side protection member 72 contacts the switch housing 68c of the first trigger switch 68 has been described. Different from this, the contact portion 72a of the front side protection member 72 may contact the switch housing 70b of the second trigger switch 70, the panel housing 62c of the first display operation panel 62, or the panel housing 64c of the second display operation panel 64. In addition, the rear side protection member 74 may include a contact portion (not shown) instead of the contact portion 72a of the front side protection member 72.

[0063] (Corresponding relationship)

[0064] As described above, in one or more embodiments, the hair dryer 10 (an example of a working machine) includes: a handle unit 38 (an example of a gripping member) that is gripped by a user with one hand; a front side protection member 72 (an example of a protection member) that at least partially covers the surface of the handle unit 38 and is made of a conductive elastic body (an example of a conductive material); a trigger lever 58 (an example of an operating member) that can be operated by a user with one hand; and a first trigger switch 68 (an example of a detection sensor) that is configured to detect the operation of the trigger lever 58; and a control unit 56. The front side protection member 72 includes a contact portion 72a that enters the inside of the handle unit 38. The first trigger switch 68 includes a switch lever 68a and a switch button 68b (an example of a conductive member) that are electrically connected to the control unit 56; and a switch housing 68c (an example of a sensor housing) that holds the switch lever 68a and the switch button 68b and is made of plastic (an example of an insulating material). The contact portion 72a contacts the switch housing 68c.

[0065] According to the above structure, the front side protection member 72 that contacts the user's hand is composed of a conductive elastic body, and the contact portion 72a of the front side protection member 72 contacts the switch housing 68c. Therefore, when static electricity is accumulated in the hair dryer 10, discharge occurs between the switch rod 68a, the switch button 68b of the first trigger switch 68 and the contact portion 72a of the front side protection member 72, and the charge moves from the front side protection member 72 to the user's hand. Thus, it is possible to suppress the situation in which discharge occurs in the user's hand due to static electricity without connecting the control unit 56 to the user's hand. In addition, in the above structure, since the contact portion 72a contacts the switch housing 68c, the distance between the contact portion 72a and the switch rod 68a and the switch button 68b is not easy to deviate, and a stable discharge characteristic can be achieved between the contact portion 72a and the switch rod 68a and the switch button 68b.

[0066] In one or more embodiments, the hair dryer 10 is configured to be used in a state where the hair dryer 10 is held by a user and is lifted off the ground.

[0067] In the hair dryer 10 as described above, the charges caused by static electricity generated during use are not easy to move to the ground, so the charges caused by static electricity are easily accumulated inside the hair dryer 10. According to the above structure, in the hair dryer 10 that easily accumulates static electricity, it is possible to suppress the discharge caused by static electricity in the user's hand without connecting the control unit 56 to the user's hand.

[0068] In one or more embodiments, the hair dryer 10 further includes: a motor housing 46 (an example of an air supply path); an air supply fan 50 disposed in the motor housing 46; and an electric motor 52 (an example of a prime mover) that rotates the air supply fan 50. The control unit 56 is configured to control the operation of the electric motor 52.

[0069] In the hair dryer 10 as described above, charges caused by static electricity originally carried by particles in the air flowing inside the hair dryer 10 and charges caused by static electricity generated by friction between particles and components of the hair dryer 10 are easily accumulated inside the hair dryer 10. According to the above-mentioned structure, in the hair dryer 10 that easily accumulates static electricity, it is possible to suppress the situation in which discharge is generated in the user's hand due to static electricity without connecting the control unit 56 to the user's hand.

[0070] In one or more embodiments, the signal wiring 68 d (an example of wiring) connecting the control unit 56 and the first trigger switch 68 extends 90° or more in the circumferential direction along the outer surface of the motor case 46 .

[0071] According to the above configuration, it is possible to collect static electricity generated in the motor case 46 by using the signal wiring 68 d connecting the control unit 56 and the first trigger switch 68 without using a special member such as a conductive ring.

[0072] In one or more embodiments, the power wiring 30 a (an example of wiring) connecting the control unit 56 and the battery unit 14 (an example of a power source) extends 90° or more in the circumferential direction along the outer surface of the motor housing 46 .

[0073] According to the above-described structure, it is possible to collect static electricity charges generated in the motor case 46 by using the power wiring 30 a connecting the control unit 56 and the battery unit 14 without using a special member such as a conductive ring.

[0074] In one or more embodiments, the control unit 56 is configured to control the operation of the electric motor 52 by controlling the power supplied to the electric motor 52 .

[0075] In the hair dryer 10 using the electric motor 52 as the prime mover, it is necessary to reliably prevent the user from getting an electric shock because a relatively high power is supplied from the battery unit 14. According to the above structure, since the control unit 56 and the user's hand are not electrically connected, the user can be reliably prevented from getting an electric shock, and discharge caused by static electricity in the user's hand can be suppressed.

[0076] In one or more embodiments, the motor wiring 52 h (an example of wiring) connecting the control unit 56 and the electric motor 52 extends 90° or more in the circumferential direction along the outer surface of the motor case 46 .

[0077] According to the above configuration, it is possible to collect static electricity charges generated in the motor case 46 by using the motor wiring 52 h connecting the control unit 56 and the electric motor 52 without using a special member such as a conductive ring.

[0078] In one or more embodiments, the hair dryer 10 (an example of a working machine) includes: a handle unit 38 (an example of a gripping member) that is gripped by a user with one hand; a front side protection member 72 (an example of a protection member) that at least partially covers the surface of the handle unit 38 and is made of a conductive elastic body (an example of a conductive material); a motor housing 46 (an example of an air supply path); an air supply fan 50 that is disposed in the motor housing 46; an electric motor 52 that rotates the air supply fan 50; and a motor wiring 52h (an example of wiring) that is connected to the electric motor 52 and extends 90° or more in the circumferential direction along the outer surface of the motor housing 46. The static electricity generated in the motor housing 46 is collected by the motor wiring 52h and moves from the front side protection member 72 to one hand of the user.

[0079] According to the above configuration, it is possible to collect static electricity charges generated in the motor case 46 by using the motor wiring 52 h connected to the electric motor 52 without using any special member such as a conductive ring.

Claims

1. A working machine, wherein: The operating machine has: a holding member, which is held by a user with one hand; a protective member, which at least partially covers the surface of the holding member and is made of a conductive material; an operating member, which the user can operate with the one hand; a detection sensor configured to detect an operation performed on the operating member; as well as Control unit, The protection member includes an abutment portion that enters into the interior of the holding member, The detection sensor has: a conductive component electrically connected to the control unit; and The sensor housing, which holds the conductive components, is made of insulating material, The abutting portion abuts against the sensor housing.

2. The working machine according to claim 1, wherein: The working machine is configured to be used in a state where the working machine is held by the user and is lifted off the ground.

3. The working machine according to claim 1 or 2, wherein: The machine also has: Air supply path; an air supply fan disposed in the air supply passage; and a prime mover that rotates the air supply fan, The control unit is configured to control the operation of the prime mover.

4. The working machine according to claim 3, wherein: The wiring connecting the control unit and the detection sensor extends over 90° or more in the circumferential direction along the outer surface of the air supply passage.

5. The working machine according to claim 3 or 4, wherein: The wiring connecting the control unit and the power supply extends 90° or more in the circumferential direction along the outer surface of the air supply passage.

6. The working machine according to any one of claims 3 to 5, wherein: The prime mover is an electric motor, The control unit is configured to control the operation of the electric motor by controlling the electric power supplied to the electric motor.

7. The working machine according to claim 6, wherein: The wiring connecting the control unit and the electric motor extends over 90° or more in the circumferential direction along the outer surface of the air supply passage.

8. A working machine, wherein: The operating machine has: a holding member, which is held by a user with one hand; a protective member, which at least partially covers the surface of the holding member and is made of a conductive material; Air supply path; an air supply fan, which is arranged in the air supply path; an electric motor that rotates the air supply fan; A wiring, which is connected to the electric motor and extends 90° or more in the circumferential direction along the outer surface of the air supply passage, The static electricity generated in the air supply passage is collected by the wiring and moves from the protection member to the one hand of the user.

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