Dust collector

Abstract

To discharge static electricity staying in a dust collector.SOLUTION: A dust collector includes: a head having a top cover; a tank arranged below the head, to which a first conductive member is attached; a tank cover arranged between the head and the tank including a cover part for covering an opening in the upper end part of the tank and a suction cylinder into which a dust collection hose is inserted, to which a second conductive member is attached; and a suction unit including a motor and a blower fan that rotates by the rotational force generated by the motor, which generates suction force in the suction cylinder. The first conductive member is grounded. The second conductive member is connected to the first conductive member.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The technology disclosed in this specification relates to a dust collector.

Background Art

[0002] In the technical field related to dust collectors, an electric dust collector as disclosed in Patent Document 1 is known. The electric dust collector disclosed in Patent Document 1 includes an earth plate and a cable for discharging static electricity staying in a hose joint to the ground.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, the hose joint is provided in a tank. Static electricity may stay in a member different from the tank.

[0005] The technology disclosed in this specification aims to discharge static electricity staying in a dust collector.

Means for Solving the Problems

[0006] This specification discloses a dust collector. The dust collector may include a head having a top cover, a tank disposed below the head to which a first conductive member is attached, a cover portion disposed between the head and the tank to cover an opening at an upper end of the tank, and a suction cylinder into which a dust collection hose is inserted, a tank cover to which a second conductive member is attached, a motor, and a blower fan that rotates by a rotational force generated by the motor, and a suction unit that generates a suction force in the suction cylinder. The first conductive member may be grounded. The second conductive member may be connected to the first conductive member. [Effect of the Invention]

[0007] According to the technology disclosed in this specification, static electricity accumulated in the dust collector is discharged. [Brief Description of the Drawings]

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

[0009] In one or more embodiments, the dust collector may include a head having a top cover, a tank disposed below the head to which a first conductive member is attached, a cover portion disposed between the head and the tank to cover an opening at an upper end of the tank, and a suction cylinder into which a dust collection hose is inserted, a tank cover to which a second conductive member is attached, a motor, and a blower fan that rotates by a rotational force generated by the motor, and a suction unit that generates a suction force in the suction cylinder. The first conductive member may be grounded. The second conductive member may be connected to the first conductive member.

[0010] In the above configuration, static electricity remaining in the tank cover is discharged to the ground via the second conductive member and the first conductive member. It is possible to suppress a user of the dust collector from feeling discomfort due to static electricity remaining in the dust collector.

[0011] In one or more embodiments, at least a part of the second conductive member may be disposed inside the suction cylinder so as to contact the dust collection hose.

[0012] In the above configuration, static electricity remaining in the dust collection hose is discharged to the ground via the second conductive member and the first conductive member. It is possible to suppress a user of the dust collector from feeling discomfort due to static electricity remaining in the dust collection hose.

[0013] In one or more embodiments, the second conductive member may be an elastic member.

[0014] In the above configuration, due to the elastic force of the second conductive member, the second conductive member is pressed against the first conductive member, so that the second conductive member and the first conductive member can be stably electrically connected.

[0015] In one or more embodiments, the second conductive member may include a leaf spring.

[0016] In the above configuration, since the second conductive member is plate-shaped, the second conductive member and the first conductive member can stably conduct electricity.

[0017] In one or more embodiments, the first conductive member may include a lead wire.

[0018] In the above configuration, since the first conductive member can be bent into an arbitrary shape, it can be disposed at an arbitrary position in the tank.

[0019] In one or more embodiments, the dust collector may include a connector attached to an end of the lead wire and a screw for fixing the connector to the tank while being connected to the connector. The second conductive member may contact the screw.

[0020] In the above configuration, the second conductive member can conduct electricity with the first conductive member via the screw and the connector. The second conductive member can stably conduct electricity with the head of the screw.

[0021] In one or more embodiments, the dust collector may include a screw for fixing the first conductive member to the tank while being connected to the first conductive member. The second conductive member may contact the screw.

[0022] In the above configuration, the second conductive member can conduct electricity with the first conductive member via the screw. The second conductive member can stably conduct electricity with the head of the screw.

[0023] In one or more embodiments, a screw boss may be provided on the inner surface of the tank. The screw may fix the first conductive member to the screw boss.

[0024] In the above configuration, since a screw boss is provided on the inner surface of the tank, the screw and the first conductive member are stably fixed to the tank.

[0025] In one or more embodiments, the upper end portion of the second conductive member may be arranged to face the flow path of the suction cylinder. The lower end portion of the second conductive member may be arranged below the lower surface of the cover portion. The intermediate portion of the second conductive member between the upper end portion and the lower end portion may be fixed to at least a part of the tank cover.

[0026] In the above configuration, the second conductive member can conduct the dust collecting hose inserted into the suction cylinder 17 and the first conductive member of the tank in a state of being fixed to the tank cover.

[0027] In one or more embodiments, the intermediate portion may be embedded inside the tank cover.

[0028] In the above configuration, the second conductive member is stably fixed to the tank cover.

[0029] In one or more embodiments, a hole may be provided in the intermediate portion. At least a part of the tank cover may enter the hole.

[0030] In the above configuration, the second conductive member is stably fixed to the tank cover.

[0031] In one or more embodiments, a ring portion may be provided on the inner surface of the suction cylinder. The upper end portion of the second conductive member may be arranged in a notch provided in a part of the ring portion.

[0032] In the above configuration, the upper end portion of the second conductive member is positioned in the suction cylinder by being arranged in the notch.

[0033] In one or more embodiments, the first conductive member may be supported by the inner surface of the tank.

[0034] In the above configuration, since the first conductive member does not move unnecessarily in the internal space of the tank, deterioration of the first conductive member is suppressed.

[0035] In one or more embodiments, the dust collector may include an intermediate holding member provided on the inner surface of the tank and holding the first conductive member.

[0036] In the above configuration, since the first conductive member is held by the intermediate holding member, the first conductive member is suppressed from moving unnecessarily in the internal space of the tank. Since the first conductive member does not move unnecessarily in the internal space of the tank, deterioration of the first conductive member is suppressed.

[0037] In one or more embodiments, the intermediate holding member may include a first convex portion protruding from the inner surface of the tank and a second convex portion adjacent to the first convex portion. The first conductive member may be inserted between the first convex portion and the second convex portion.

[0038] In the above configuration, the intermediate holding member has a simple structure and can hold the first conductive member.

[0039] In one or more embodiments, the dust collector may include a lower end holding member inserted into an opening provided at the bottom of the tank. At least a part of the first conductive member may be held by the lower end holding member. The lower end portion of the first conductive member may be disposed below the lower surface of the tank.

[0040] In the above configuration, the lower end portion of the first conductive member is positioned by the lower end holding member. Since the protruding amount of the lower end portion of the first conductive member from the lower surface of the tank is maintained at a constant value, the lower end portion of the first conductive member can be stably grounded. Further, by functioning as a seal member that closes the opening at the bottom, leakage of dust or liquid accommodated in the internal space of the tank 3 through the opening at the bottom is suppressed.

[0041] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. Also, some components may not be used.

[0042] In the embodiment, the terms "front", "rear", "left", "right", "upper", and "lower" are used to describe the positional relationship of each part. These terms indicate the relative position or direction based on the center of the dust collector 1.

[0043] [Dust collector] FIG. 1 is a perspective view of the dust collector 1 according to the embodiment as seen from the upper left front. FIG. 2 is a perspective view of the dust collector 1 according to the embodiment as seen from the lower right front. FIG. 3 is a cross-sectional view of the dust collector 1 according to the embodiment.

[0044] In the embodiment, the dust collector 1 is a wet and dry dual-use dust collector that can suck in not only gas but also liquid. As the gas, air is exemplified. As the liquid, water is exemplified.

[0045] As shown in FIGS. 1, 2, and 3, the dust collector 1 includes a head 2, a tank 3, a tank cover 4, a latch 5, a dust collection hose 6, a suction unit 7, a filter unit 8, a float 9, a battery mounting portion 10, a controller 11, and an operation panel 12.

[0046] The tank 3 stores dust or liquid. The tank 3 is disposed below the head 2. At least a part of the tank 3 is disposed below the tank cover 4. At least a part of the tank cover 4 is disposed below the head 2. The tank cover 4 is disposed between the head 2 and the tank 3. Each of the head 2 and the tank cover 4 is detachable from the tank 3. The latch 5 fixes the head 2 and the tank 3. The tank cover 4 is sandwiched between the head 2 and the tank 3.

[0047] The head 2 has a top cover 13, a battery cover 14, and a handle 15.

[0048] The top cover 13 is disposed above the tank cover 4. The top cover 13 is arranged to cover the tank cover 4 from above. The top cover 13 is made of synthetic resin. The top cover 13 forms an accommodation space between it and the tank cover 4. Each of the controller 11 and the suction unit 7 is disposed in the accommodation space between the top cover 13 and the tank cover 4. The operation panel 12 is disposed in the opening 13A provided at the front portion of the top cover 13. The battery mounting portion 10 is disposed inside the recess 13B provided at the upper portion of the top cover 13.

[0049] The battery cover 14 covers the recess 13B. The battery cover 14 is rotatably supported by the top cover 13. By rotating, the battery cover 14 changes between a closed state in which the recess 13B is closed and an open state in which the recess 13B is opened.

[0050] The handle 15 is gripped by the user of the dust collector 1. The handle 15 is rotatably connected to the top cover 13. The user can carry the dust collector 1 by gripping the handle 15.

[0051] FIG. 4 is an exploded perspective view showing the tank 3 and the tank cover 4 according to the embodiment. The tank 3 has an internal space for accommodating at least one of dust and liquid. The tank 3 has a front portion 3A, a rear portion 3B, a left portion 3C, a right portion 3D, and a bottom portion 3E. An opening 3F is provided at the upper end portion of the tank 3. The dimension of the tank 3 in the front-rear direction is larger than the dimension of the tank 3 in the left-right direction. The tank 3 is made of synthetic resin.

[0052] A hose winding portion 3G is provided at the front portion 3A of the tank 3. The hose winding portion 3G is provided so as to protrude forward from the front portion 3A. Recesses 3H are provided in each of the left portion 3C and the right portion 3D of the tank 3.

[0053] As shown in FIG. 2, the tank 3 has legs 3J. The legs 3J are projections provided on the bottom 3E. The legs 3J are provided so as to project downward from the lower surface of the bottom 3E. The legs 3J are provided at each of the four corners of the lower surface of the bottom 3E.

[0054] The tank 3 has an overhanging portion 3K provided at a part of the upper end of the tank 3. The overhanging portion 3K is provided at the front and left parts of the upper end of the tank 3. The overhanging portion 3K is arranged to cover a part of the opening 3F. A hole 3L is formed in the overhanging portion 3K. The hole 3L is formed so as to penetrate the upper and lower surfaces of the overhanging portion 3K.

[0055] The tank cover 4 is placed on the upper end of the tank 3. The tank cover 4 has a plate-like cover portion 16 that covers the opening 3F at the upper end of the tank 3 and a suction cylinder 17 into which the dust collection hose 6 is inserted. The tank cover 4 is made of synthetic resin. A seal member 18 is arranged at the peripheral edge of the lower surface of the cover portion 16. The seal member 18 seals the boundary between the tank 3 and the tank cover 4. In a state where the tank cover 4 is placed on the upper end of the tank 3, the seal member 18 contacts each of the lower surface of the cover portion 16 and the upper end surface of the tank 3.

[0056] FIG. 5 is a perspective view from the upper left front showing the suction cylinder 17 according to the embodiment. FIG. 6 is a perspective view from the upper right front showing the suction cylinder 17 according to the embodiment. The suction cylinder 17 sucks at least one of dust and liquid. As shown in FIG. 1, the suction cylinder 17 is covered by the top cover 13. The suction cylinder 17 is arranged above the overhanging portion 3K. The suction cylinder 17 has a suction port 19 and a flow path 20 connected to the suction port 19. The suction port 19 is arranged at the front end of the suction cylinder 17. The suction port 19 of the suction cylinder 17 faces forward. The suction port 19 communicates with the hole 3L through the flow path 20.

[0057] The suction cylinder 17 is connected to the dust collection hose 6. The dust collection hose 6 is inserted into the inside of the suction cylinder 17 through the suction port 19. The dust collection hose 6 includes a joint portion 21. The joint portion 21 includes a convex portion. The suction cylinder 17 has a groove 22. The convex portion of the joint portion 21 fits into the groove 22.

[0058] The dust collection hose 6 is wound around the hose winding part 3G. Each of the left side surface, right side surface, and bottom surface of the hose winding part 3G is a curved surface adapted to the outer peripheral surface of the dust collection hose 6. A receiver 23 is provided on the upper surface of the hose winding part 3G. The receiver 23 holds at least a part of the dust collection hose 6.

[0059] The dust collection hose 6 connected to the suction cylinder 17 is wound around the hose winding part 3G and held by the receiver 23, whereby it is supported at the front part of the tank 3.

[0060] Each of the suction unit 7, the filter unit 8, the battery mounting part 10, and the controller 11 is supported by the tank cover 4. Each of the suction unit 7, the battery mounting part 10, and the controller 11 is disposed above the upper surface of the cover part 16 of the tank cover 4. The filter unit 8 is disposed below the lower surface of the tank cover 4.

[0061] The suction unit 7, the battery mounting part 10, and the controller 11 are arranged in the front - rear direction. The suction unit 7 is disposed at the rear part of the tank cover 4. The battery mounting part 10 is disposed in front of the suction unit 7. The controller 11 is disposed in front of the battery mounting part 10.

[0062] The suction unit 7 generates a suction force at the suction port 19 of the suction cylinder 17. As shown in FIG. 3, the suction unit 7 has a motor 24, a blower fan 25, a motor housing part 26, and a fan housing part 27.

[0063] The motor 24 generates a rotational force for rotating the blower fan 25. The motor 24 is an inner - rotor type brushless motor. The motor 24 has a stator, a rotor disposed inside the stator, and a rotor shaft fixed to the rotor. The lower part of the rotor shaft projects downward from the lower end surface of the rotor.

[0064] The blower fan 25 rotates by the rotational force generated by the motor 24. The blower fan 25 is fixed to the lower part of the rotor shaft. When the motor 24 is driven and the rotor shaft rotates, the blower fan 25 rotates.

[0065] The motor housing part 26 houses the motor 24. The fan housing part 27 houses the blower fan 25. The motor housing part 26 is arranged above the fan housing part 27.

[0066] The blower fan 25 generates a suction force at the intake port 28 provided at the lower part of the fan housing part 27. The internal space of the tank 3 is connected to the suction port 19 via the hole 3L. The intake port 28 is connected to the suction port 19 via the filter unit 8, the internal space of the tank 3, and the hole 3L. Due to the rotation of the blower fan 25, a suction force is generated at the suction port 19 via the intake port 28, the filter unit 8, the internal space of the tank 3, and the hole 3L. The air sucked in from the suction port 19 passes through the hole 3L, the internal space of the tank 3, and the filter unit 8, and then flows into the intake port 28 of the suction unit 7. The dust or liquid sucked in from the suction port 19 is housed in the internal space of the tank 3.

[0067] The tank cover 4 has a swirling path 32 and an exhaust path 33. The air that has flowed into the internal space of the fan housing part 27 via the intake port 28 is discharged from the exhaust path 33 after passing through the swirling path 32.

[0068] The filter unit 8 collects dust from the air flowing into the intake port 28 of the suction unit 7. The filter unit 8 is arranged in the internal space of the tank 3 while being supported by the tank cover 4. The filter unit 8 is cylindrical with a bottom. The filter unit 8 is supported by the tank cover 4 such that the inner space of the filter unit 8 is connected to the intake port 28. The float 9 is arranged in the inner space of the filter unit 8.

[0069] The battery mounting portion 10 is connected to the battery pack 29. The battery pack 29 is mounted on the battery mounting portion 10. The battery mounting portion 10 has a pair of guide rails and a terminal block disposed between the pair of guide rails. The guide rails extend in the left-right direction. The pair of guide rails are arranged at intervals in the front-rear direction.

[0070] The battery pack 29 is detachable from the battery mounting portion 10. The battery pack 29 supplies power to the motor 24 in a state where it is mounted on the battery mounting portion 10. Also, the battery pack 29 supplies power to the electronic devices mounted on the dust collector 1. The battery pack 29 is a general-purpose battery that can be used as a power source for various electrical devices. The battery pack 29 can be used as a power source for power tools. The battery pack 29 can be used as a power source for electrical devices other than power tools. The battery pack 29 can be used as a power source for a dust collector different from the dust collector 1 according to the embodiment. The battery pack 29 includes a lithium-ion battery. The battery pack 29 is a rechargeable battery that can be charged. The battery mounting portion 10 has a structure equivalent to that of the battery mounting portion of a power tool.

[0071] The user of the dust collector 1 can perform the operation of mounting the battery pack 29 on the battery mounting portion 10 and the operation of removing the battery pack 29 from the battery mounting portion 10. The user can mount the battery pack 29 on the battery mounting portion 10 by inserting the battery pack 29 into the battery mounting portion 10 from the right. The battery pack 29 is inserted into the battery mounting portion 10 while being guided by the guide rails. When the battery pack 29 is mounted on the battery mounting portion 10, the terminals of the battery pack 29 and the terminal block of the battery mounting portion 10 are electrically connected. The user of the dust collector 1 can remove the battery pack 29 from the battery mounting portion 10 by moving the battery pack 29 to the left.

[0072] The controller 11 controls the motor 24. The controller 11 includes a control circuit board and a case that holds the control circuit board. The control circuit board includes a microcomputer and a switching element for controlling the motor 24.

[0073] The operation panel 12 is disposed on the front surface of the top cover 13. The operation panel 12 has an operation dial 12A and a display unit 12B. The operation dial 12A is operated to rotate. The display unit 12B displays the remaining capacity of the battery pack 29. When the operation dial 12A is operated by the user, an operation signal is generated. The operation signal is transmitted to the controller 11. The controller 11 switches the driving and stopping of the motor 24 based on the operation signal. Also, the controller 11 adjusts the rotation speed of the motor 24 based on the operation signal. When the rotation speed of the motor 24 is adjusted, the suction force generated at the suction port 19 is adjusted. When the rotation speed of the motor 24 increases, the suction force generated at the suction port 19 increases, and when the rotation speed of the motor 24 decreases, the suction force generated at the suction port 19 decreases. In the embodiment, when the operation dial 12A is operated, the state of the motor 24 is switched among a stopped state, a low suction force state, and a high suction force state.

[0074] As shown in FIG. 2, the top cover 13 has an insertion port 31 into which the suction nozzle 30 is inserted. The insertion port 31 is provided at the right rear part of the top cover 13.

[0075] [Operation] The user operates the operation dial 12A to drive the motor 24 for cleaning using the dust collector 1. When the motor 24 is driven, the blower fan 25 rotates. When the blower fan 25 rotates, a suction force is generated at the suction port 19.

[0076] When dry cleaning is performed, air is sucked into the suction port 19 through the dust collecting hose 6. The air sucked into the suction port 19 flows into the internal space of the tank 3 through the suction cylinder 17 and the hole 3L. At least a part of the air that has flowed into the internal space of the tank 3 passes through the filter unit 8 and flows into the inner space of the filter unit 8. Dust contained in the air is collected by the filter unit 8. The air that has flowed into the inner space of the filter unit 8 flows into the internal space of the fan housing portion 27 through the intake port 28. The air that has flowed into the internal space of the fan housing portion 27 through the intake port 28 is discharged from the exhaust passage 33 after passing through the swirl passage 32 provided in the tank cover 4.

[0077] When wet cleaning is performed, liquid is sucked into the suction port 19 through the dust collecting hose 6. The liquid sucked into the suction port 19 flows into the internal space of the tank 3 through the suction cylinder 17 and the hole 3L. At least a part of the liquid that has flowed into the internal space of the tank 3 is stored in the tank 3. At least a part of the liquid that has flowed into the internal space of the tank 3 passes through the filter unit 8 and flows into the inner space of the filter unit 8. A float 9 is disposed in the inner space of the filter unit 8. The float 9 can float on the liquid. When liquid flows into the inner space of the filter unit 8, the float 9 moves upward so as to block the intake port 28 of the suction unit 7. When the float 9 moves to the intake port 28 of the suction unit 7 and blocks the intake port 28, the inflow of liquid into the internal space of the fan housing portion 27 and the internal space of the motor housing portion 26 is suppressed. Thereby, the intrusion of liquid into the motor 24 is suppressed.

[0078] [Grounding Structure] FIG. 7 is a perspective view from the upper right front showing the suction cylinder 17 according to the embodiment. FIG. 8 is an exploded perspective sectional view from the upper right front showing the tank 3 and the tank cover 4 according to the embodiment. FIG. 9 is a perspective sectional view from the upper right front showing the tank 3 according to the embodiment. FIG. 10 is a sectional view showing a part of the tank 3 according to the embodiment. FIG. 11 is a sectional view showing a part of the tank 3 and the tank cover 4 according to the embodiment. FIG. 12 is a perspective sectional view from the upper right front showing a part of the tank 3 and the tank cover 4 according to the embodiment. FIG. 13 is a perspective sectional view from the upper right front showing a part of the tank 3 and the tank cover 4 according to the embodiment. FIG. 13 corresponds to an enlarged view of a part of FIG. 12.

[0079] The dust collector 1 has a grounding structure 40 that discharges static electricity staying in at least a part of the dust collector 1. The grounding structure 40 has a first conductive member 41 attached to the tank 3 and a second conductive member 42 attached to the tank cover 4. The first conductive member 41 is grounded. The second conductive member 42 is connected to the first conductive member 41. Due to the first conductive member 41 and the second conductive member 42, the static electricity staying in the tank cover 4 is discharged to the ground through the second conductive member 42 and the first conductive member 41.

[0080] At least a part of the second conductive member 42 is disposed inside the suction cylinder 17 so as to contact the dust collection hose 6 inserted inside the suction cylinder 17. At least a part of the second conductive member 42 is disposed so as to face the flow path 20 of the suction cylinder 17.

[0081] The second conductive member 42 is an elastic member. In the embodiment, the second conductive member 42 includes a leaf spring. The second conductive member 42 is a vertically long metal leaf spring.

[0082] The upper end portion 42B of the second conductive member 42 is disposed so as to face the flow path 20 of the suction cylinder 17. The lower end portion 42C of the second conductive member 42 is disposed below the lower surface of the cover portion 16. The intermediate portion 42A of the second conductive member 42 between the upper end portion 42B and the lower end portion 42C is fixed to at least a part of the tank cover 4.

[0083] The upper end portion 42B of the second conductive member 42 contacts the dust collecting hose 6 inserted inside the suction cylinder 17. The second conductive member 42 generates an elastic force so that the upper end portion 42B is pressed against the dust collecting hose 6 inserted inside the suction cylinder 17. When the dust collecting hose 6 is inserted inside the suction cylinder 17, the upper end portion 42B is in close contact with the dust collecting hose 6.

[0084] A ring portion 17A is provided on the inner surface of the suction cylinder 17. The ring portion 17A is fixed to the suction cylinder 17. In the embodiment, the suction cylinder 17 and the ring portion 17A are integral. The end face of the dust collecting hose 6 inserted into the suction cylinder 17 is connected to the ring portion 17A.

[0085] The upper end portion 42B of the second conductive member 42 is disposed in a notch portion 17B provided in a part of the ring portion 17A. The notch portion 17B is provided in the left part of the ring portion 17A. By disposing the upper end portion 42B in the notch portion 17B, the upper end portion 42B is positioned with respect to the suction cylinder 17.

[0086] The lower end portion 42C of the second conductive member 42 is disposed in the internal space of the tank 3. The lower end portion 42C of the second conductive member 42 is inserted into the hole 3L of the tank 3 from above the tank 3. The lower end portion 42C is disposed in the internal space of the tank 3 through the hole 3L. The lower end portion 42C of the second conductive member 42 is connected to the first conductive member 41 in the internal space of the tank 3.

[0087] The middle portion 42A of the second conductive member 42 is embedded inside the tank cover 4. The middle portion 42A is welded to the tank cover 4. With the middle portion 42A attached to the base material of the tank cover 4, the middle portion 42A is welded to the base material using the same type of synthetic resin as the base material of the tank cover 4. By welding the middle portion 42A to the base material, the middle portion 42A is embedded inside the tank cover 4.

[0088] The middle part 42A is in the shape of a plate that is long in the vertical direction. A hole 42D is provided in the middle part 42A. Two holes 42D are provided in the vertical direction. At least a part of the tank cover 4 enters the hole 42D. That is, in welding, the molten synthetic resin enters the hole 42D. By having at least a part of the tank cover 4 enter the hole 42D, the middle part 42A is firmly fixed to the tank cover 4.

[0089] The first conductive member 41 is supported on the inner surface of the tank 3. The first conductive member 41 includes a lead wire. The first conductive member 41 has a conductive core wire and an insulating coating film that covers the core wire. At each of the lower end portion 41A and the upper end portion 41B of the first conductive member 41, the core wire is exposed from the coating film. In the middle part of the first conductive member 41, the core wire is covered with the coating film.

[0090] The upper end portion 41B of the first conductive member 41 is fixed to the tank 3 by a screw 46. The screw 46 fixes the upper end portion 41B of the first conductive member 41 to the tank 3 while being connected to the core wire of the first conductive member 41. In the embodiment, a connector 45 is attached to the upper end portion 41B of the first conductive member 41. The connector 45 is fixed to the tank 3 by a screw 46. The screw 46 fixes the connector 45 to the tank 3, thereby fixing the upper end portion 41B of the first conductive member 41 to the tank 3.

[0091] The connector 45 is a conductive plate member. The screw 46 is conductive. The screw 46 fixes the connector 45 to the tank 3 while being connected to the connector 45. The screw 46, the connector 45, and the core wire of the first conductive member 41 are electrically connected.

[0092] A screw boss 3M is provided on the inner surface of the tank 3. The screw boss 3M is provided above the bottom surface of the bottom portion 3E. The screw boss 3M is provided above the center of the tank 3 in the vertical direction. In the embodiment, the screw boss 3M is provided at the upper part and the front part of the inner surface (right surface) of the left part 3C of the tank 3. The screw boss 3M is provided directly below the hole 3L.

[0093] The screw 46 fixes the upper end portion 41B of the first conductive member 41 to the screw boss 3M. The screw 46 fixes the upper end portion 41B of the first conductive member 41 to the screw boss 3M by fixing the connector 45 to the screw boss 3M.

[0094] The connector 45 has a hole into which the threaded portion of the screw 46 is inserted. The screw hole of the screw boss 3M extends downward from the upper end surface of the screw boss 3M. The screw 46 is inserted into the screw hole of the screw boss 3M from above the screw boss 3M through the hole of the connector 45. The connector 45 is disposed between the head of the screw 46 and the upper end surface of the screw boss 3M. When the threaded portion of the screw 46 is inserted into the screw hole of the screw boss 3M, the connector 45 is fixed to the screw boss 3M of the tank 3. When the connector 45 is fixed to the screw boss 3M of the tank 3, the upper end portion 41B of the first conductive member 41 is fixed to the screw boss 3M of the tank 3. The head of the screw 46 is disposed above the screw boss 3M. The head of the screw 46 faces upward. The head of the screw 46 is disposed directly below the hole 3L.

[0095] The lower end portion 42C of the second conductive member 42 contacts the head of the screw 46. The lower end portion 42C contacts the head of the screw 46 from above the screw 46. The second conductive member 42 generates an elastic force so that the lower end portion 42C is pressed against the head of the screw 46. The lower end portion 42C is in close contact with the head of the screw 46.

[0096] An intermediate holding member 44 for holding the first conductive member 41 is provided on the inner surface of the tank 3. The intermediate holding member 44 holds the intermediate portion of the first conductive member 41. The intermediate holding member 44 holds the coating film of the first conductive member 41. The intermediate holding member 44 holds the intermediate portion of the first conductive member 41 so that the first conductive member 41 contacts the inner surface of the tank 3.

[0097] The intermediate holding member 44 is provided on each of the right surface of the left portion 3C and the bottom surface of the bottom portion 3E of the tank 3. A plurality of intermediate holding members 44 are provided at intervals. In the embodiment, two intermediate holding members 44 are provided in the vertical direction on the right surface of the left portion 3C. Two intermediate holding members 44 are provided in the horizontal direction on the bottom surface of the bottom portion 3E.

[0098] The intermediate holding member 44 includes a first convex portion 44A protruding from the inner surface of the tank 3 and a second convex portion 44B adjacent to the first convex portion 44A. The intermediate portion of the first conductive member 41 is inserted between the first convex portion 44A and the second convex portion 44B. By inserting the first conductive member 41 between the first convex portion 44A and the second convex portion 44B, the intermediate holding member 44 can hold the first conductive member 41.

[0099] The intermediate holding member 44 is formed of an insulating material. The intermediate holding member 44 is formed of, for example, a synthetic resin. The intermediate holding member 44 is fixed to the inner surface of the tank 3. In the embodiment, the tank 3 and the intermediate holding member 44 are integral.

[0100] The lower end holding member 43 is disposed at the bottom 3E of the tank 3. An opening is provided at the central portion of the bottom 3E of the tank 3. The lower end holding member 43 is inserted into the opening provided in the bottom 3E of the tank 3. The lower end holding member 43 functions as a seal member that closes the opening in the bottom 3E. At least a part of the first conductive member 41 is held by the lower end holding member 43. The lower end holding member 43 holds the lower end portion 41A of the first conductive member 41. The lower end holding member 43 is formed of an insulating material. The lower end holding member 43 is formed of, for example, a synthetic resin.

[0101] The lower end holding member 43 has a hole into which the lower end portion 41A of the first conductive member 41 is inserted. The lower end holding member 43 closes the opening provided in the bottom 3E. The lower end portion 41A of the first conductive member 41 protrudes below the lower surface of the lower end holding member 43. The lower end portion 41A of the first conductive member 41 is disposed below the lower surface of the tank 3. With the legs 3J of the tank 3 placed on the ground, the lower end portion 41A of the first conductive member 41 contacts the ground. That is, with the legs 3J of the tank 3 placed on the ground, the lower end portion 41A of the first conductive member 41 is grounded.

[0102] The upper end portion 41B of the first conductive member 41 is fixed to the screw boss 3M by a screw 46. The lower end portion 41A of the first conductive member 41 is held by the lower end holding member 43 and is disposed below the lower surface of the tank 3. The intermediate portion of the first conductive member 41 is held by a plurality of intermediate holding members 44. The first conductive member 41 is disposed along the right surface of the left portion 3C and the bottom surface of the bottom portion 3E.

[0103] Static electricity may accumulate in the dust collection hose 6. The dust collection hose 6 inserted into the suction cylinder 17 is in contact with the upper end portion 42B of the second conductive member 42. The lower end portion 42C of the second conductive member 42 is in contact with the screw 46. The screw 46 is electrically connected to the upper end portion 41B of the first conductive member 41 via the connector 45. The lower end portion 41A of the first conductive member 41 is grounded. Therefore, the static electricity accumulated in the dust collection hose 6 is discharged to the ground through the second conductive member 42 and the first conductive member 41. The grounding structure 40 suppresses the accumulation of static electricity in the dust collection hose 6, so that the user of the dust collector 1 is prevented from feeling discomfort due to the static electricity accumulated in the dust collection hose 6.

[0104] [Effect] As described above, in the embodiment, the dust collector 1 includes a head 2 having a top cover 13, a tank 3 disposed below the head 2 and to which the first conductive member 41 is attached, a cover portion 16 disposed between the head 2 and the tank 3 and covering the opening 3F at the upper end of the tank 3, and a suction cylinder 17 into which the dust collection hose 6 is inserted, a tank cover 4 to which the second conductive member 42 is attached, a motor 24, and a blower fan 25 that rotates by the rotational force generated by the motor 24, and a suction unit 7 that generates a suction force in the suction cylinder 17. The first conductive member 41 is grounded. The second conductive member 42 is connected to the first conductive member 41.

[0105] In the above configuration, the static electricity accumulated in the tank cover 4 is discharged to the ground through the second conductive member 42 and the first conductive member 41. The user of the dust collector 1 is prevented from feeling discomfort due to the static electricity accumulated in the dust collector 1.

[0106] In an embodiment, at least a part of the second conductive member 42 is disposed inside the suction cylinder 17 so as to contact the dust collection hose 6.

[0107] In the above configuration, the static electricity remaining in the dust collection hose 6 is discharged to the ground via the second conductive member 42 and the first conductive member 41. It is possible to suppress a user of the dust collector 1 from feeling discomfort due to the static electricity remaining in the dust collection hose 6.

[0108] In an embodiment, the second conductive member 42 is an elastic member.

[0109] In the above configuration, due to the elastic force of the second conductive member 42, the second conductive member 42 is pressed against the first conductive member 41, so that the second conductive member 42 and the first conductive member 41 can stably conduct electricity.

[0110] In an embodiment, the second conductive member 42 includes a leaf spring.

[0111] In the above configuration, since the second conductive member 42 is plate-shaped, the second conductive member 42 and the first conductive member 41 can stably conduct electricity.

[0112] In an embodiment, the first conductive member 41 includes a lead wire.

[0113] In the above configuration, since the first conductive member 41 can be bent into an arbitrary shape, it can be disposed at an arbitrary position of the tank 3.

[0114] In an embodiment, the dust collector 1 includes a connector 45 attached to an end of the lead wire, and a screw 46 that fixes the connector 45 to the tank 3 in a state of being connected to the connector 45. The second conductive member 42 contacts the screw 46.

[0115] In the above configuration, the second conductive member 42 can conduct electricity with the first conductive member 41 via the screw 46 and the connector 45. The second conductive member 42 can stably conduct electricity with the head of the screw 46.

[0116] In an embodiment, a screw boss 3M is provided on the inner surface of the tank 3. The screw 46 fixes the first conductive member 41 to the screw boss 3M.

[0117] In the above configuration, since the screw boss 3M is provided on the inner surface of the tank 3, the screw 46 and the first conductive member 41 are stably fixed to the tank 3.

[0118] In an embodiment, the upper end portion 42B of the second conductive member 42 is arranged so as to face the flow path 20 of the suction cylinder 17. The lower end portion 42C of the second conductive member 42 is arranged below the lower surface of the cover portion 16. The intermediate portion 42A of the second conductive member 42 between the upper end portion 42B and the lower end portion 42C is fixed to at least a part of the tank cover 4.

[0119] In the above configuration, the second conductive member 42 can conduct the dust collection hose 6 inserted into the suction cylinder 17 and the first conductive member 41 of the tank 3 while being fixed to the tank cover 4.

[0120] In an embodiment, the intermediate portion 42A is embedded inside the tank cover 4.

[0121] In the above configuration, the second conductive member 42 is stably fixed to the tank cover 4.

[0122] In an embodiment, a hole 42D is provided in the intermediate portion 42A. At least a part of the tank cover 4 enters the hole 42D.

[0123] In the above configuration, the second conductive member 42 is stably fixed to the tank cover 4.

[0124] In an embodiment, a ring portion 17A is provided on the inner surface of the suction cylinder 17. The upper end portion 42B of the second conductive member 42 is arranged in a notch portion 17B provided in a part of the ring portion 17A.

[0125] In the above configuration, the upper end portion 42B of the second conductive member 42 is positioned in the suction cylinder 17 by being disposed in the notch portion 17B.

[0126] In the embodiment, the first conductive member 41 is supported by the inner surface of the tank 3.

[0127] In the above configuration, since the first conductive member 41 does not move unnecessarily in the internal space of the tank 3, deterioration of the first conductive member 41 is suppressed.

[0128] In the embodiment, the dust collector 1 is provided on the inner surface of the tank 3 and includes an intermediate holding member 44 that holds the first conductive member 41.

[0129] In the above configuration, since the first conductive member 41 is held by the intermediate holding member 44, the first conductive member 41 is suppressed from moving unnecessarily in the internal space of the tank 3. Since the first conductive member 41 does not move unnecessarily in the internal space of the tank 3, deterioration of the first conductive member 41 is suppressed.

[0130] In the embodiment, the intermediate holding member includes a first convex portion 44A protruding from the inner surface of the tank 3 and a second convex portion 44B adjacent to the first convex portion 44A. The first conductive member 41 is inserted between the first convex portion 44A and the second convex portion 44B.

[0131] In the above configuration, the intermediate holding member 44 has a simple structure and can hold the first conductive member 41.

[0132] In the embodiment, the dust collector 1 includes a lower end holding member 43 that is inserted into an opening provided in the bottom portion 3E of the tank 3. At least a part of the first conductive member 41 is held by the lower end holding member 43. The lower end portion 41A of the first conductive member 41 is disposed below the lower surface of the tank 3.

[0133] In the above configuration, the lower end portion 41A of the first conductive member 41 is positioned by the lower end holding member 43. Since the protruding amount of the lower end portion 41A of the first conductive member 41 from the lower surface of the tank 3 is maintained at a constant value, the lower end portion 41A of the first conductive member 41 can be stably grounded. Further, by functioning as a sealing member that closes the opening of the bottom portion 3E, leakage of dust or liquid accommodated in the internal space of the tank 3 through the opening of the bottom portion 3E is suppressed.

[0134] [Other Embodiments] In the above-described embodiment, the connector 45 is attached to the upper end portion 41B of the first conductive member 41. The connector 45 may be omitted. The upper end portion 41B of the first conductive member 41 may be directly fixed to the screw boss 3M by the screw 46. [Explanation of Reference Numerals]

[0135] 1... Dust collector, 2... Head, 3... Tank, 3A... Front portion, 3B... Rear portion, 3C... Left portion, 3D... Right portion, 3E... Bottom portion, 3F... Opening, 3G... Hose winding portion, 3H... Recess, 3J... Leg portion, 3K... Protruding portion, 3L... Hole, 3M... Screw boss, 4... Tank cover, 5... Latch, 6... Dust collection hose, 7... Suction unit, 8... Filter unit, 9... Float, 10... Battery mounting portion, 11... Controller, 12... Operation panel, 12A... Operation dial, 12B... Display portion, 13... Top cover, 13A... Opening, 13B... Recess, 14... Battery cover, 15... Handle, 16... Cover portion, 17... Suction cylinder, 17A... Ring portion, 17B... Notch, 18... Sealing member, 19... Suction port, 20... Flow path, 21... Joint portion, 22... Groove, 23... Receiver, 24... Motor, 25... Blower fan, 26... Motor housing portion, 27... Fan housing portion, 28... Air intake port, 29... Battery pack, 30... Suction nozzle, 31... Insertion port, 32... Swirling circuit, 33... Exhaust path, 40... Grounding structure, 41... First conductive member, 41A... Lower end portion, 41B... Upper end portion, 42... Second conductive member, 42A... Intermediate portion, 42B... Upper end portion, 42C... Lower end portion, 42D... Hole, 43... Lower end holding member, 44... Intermediate holding member, 44A... First convex portion, 44B... Second convex portion, 45... Connector, 46... Screw.

Claims

1. A head having a top cover, A tank disposed below the head and to which a first conductive member is attached, A tank cover disposed between the head and the tank, having a cover portion covering the opening at the upper end of the tank and a suction cylinder into which a dust collection hose is inserted, and to which a second conductive member is attached, A suction unit including a motor and a blower fan that rotates by the rotational force generated by the motor, and generating a suction force in the suction cylinder, The first conductive member is grounded, The second conductive member is connected to the first conductive member, A dust collector.

2. At least a part of the second conductive member is disposed inside the suction cylinder so as to contact the dust collection hose, The dust collector according to claim 1.

3. The second conductive member is an elastic member, The dust collector according to claim 1.

4. The second conductive member includes a leaf spring, The dust collector according to claim 3.

5. The first conductive member includes a lead wire, The dust collector according to claim 1.

6. A connector attached to an end of the lead wire, A screw for fixing the connector to the tank while being connected to the connector, The second conductive member contacts the screw, The dust collector according to claim 5.

7. A screw for fixing the first conductive member to the tank while being connected to the first conductive member, The second conductive member contacts the screw, The dust collector according to claim 1.

8. A screw boss is provided on the inner surface of the tank, The screw fixes the first conductive member to the screw boss, The dust collector according to claim 7.

9. The upper end portion of the second conductive member is disposed so as to face the flow path of the suction cylinder, The lower end portion of the second conductive member is disposed below the lower surface of the cover portion, An intermediate portion of the second conductive member between the upper end portion and the lower end portion is fixed to at least a part of the tank cover, The dust collector according to claim 1.

10. The intermediate portion is embedded inside the tank cover, The dust collector according to claim 9.

11. A hole is provided in the intermediate portion, At least a part of the tank cover enters the hole, The dust collector according to claim 10.

12. A ring portion is provided on the inner surface of the suction cylinder, The upper end portion of the second conductive member is disposed in a notch provided in a part of the ring portion, The dust collector according to claim 9.

13. The first conductive member is supported on the inner surface of the tank, The dust collector according to claim 1.

14. An intermediate holding member provided on the inner surface of the tank and holding the first conductive member is provided, The dust collector according to claim 13.

15. The intermediate holding member includes a first convex portion protruding from the inner surface of the tank and a second convex portion adjacent to the first convex portion, The first conductive member is inserted between the first convex portion and the second convex portion, The dust collector according to claim 14.

16. A lower end holding member inserted into an opening provided at the bottom of the tank is provided, At least a part of the first conductive member is held by the lower end holding member, The lower end portion of the first conductive member is disposed below the lower surface of the tank, The dust collector according to claim 1.

Images