JP7414630B2 - Vacuum cleaner suction body and vacuum cleaner equipped with the same - Google Patents

Description

The present invention relates to a suction port body for a vacuum cleaner and a vacuum cleaner equipped with the same.

As a suction port body of a conventional vacuum cleaner, Patent Document 1 proposes a suction device that includes a suction device main body having a suction port, a rotating brush provided on the suction device main body, a driving motor thereof, and a safety switch. has been done.
The safety switch includes a switch body, a bracket swingably provided in a recess at the bottom of the suction device body so as to be able to come into contact with and separate from a lever on the switch body, and a rotating roller provided at the tip of the bracket. .

According to this suction tool, when the suction tool body is placed on the floor, the bracket is pushed into the recess, and the bracket comes into contact with the lever, turning on the switch body and driving the stopped drive motor. The rotating brush will rotate. Furthermore, when the suction device body lifts off the floor surface, the bracket protrudes downward from the inside of the recess, whereby the bracket separates from the lever, the switch body is turned off, and the drive motor that is being driven is stopped.

Japanese Patent Application Publication No. 8-332165

A conventional suction port body equipped with a safety switch as disclosed in Patent Document 1 has a problem in that a dedicated space for providing the safety switch inside the suction port body is required.
SUMMARY OF THE INVENTION An object of the present invention is to provide a suction port body for a vacuum cleaner and a vacuum cleaner equipped with the same, which have been made in consideration of the above circumstances.

According to the present invention, a casing having a suction port, a rotary cleaning body rotatably provided in the vicinity of the suction port within the casing, and a drive provided within the casing for rotating the rotary cleaning body. and a braking mechanism provided in the vicinity of the rotating cleaning body within the housing,
The braking mechanism contacts the surface to be cleaned when the casing is placed on the surface to be cleaned and is in a non-cleaning state when the casing is separated from the surface to be cleaned. a contact member that contacts the cleaning body, and when the contact member comes into contact with the rotary cleaning body in the non-cleaning state, applying a load of a predetermined value or more to the drive unit via the rotary cleaning body; Further, there is provided a suction port body for a vacuum cleaner configured to release the load by bringing the contact member into contact with the surface to be cleaned during the cleaning state.

Further, according to the present invention, there is provided a vacuum cleaner including a vacuum cleaner body that sucks and collects dust, and the suction port body that is connected to the vacuum cleaner body directly or via an extension pipe. .

Further, according to the present invention, the present invention includes a vacuum cleaner main body that sucks and collects dust, and a suction port body that is connected to the vacuum cleaner main body directly or via an extension pipe, and the suction port body has a suction port. a casing having a housing, a rotating cleaning body rotatably provided in the vicinity of the suction port in the casing, a drive unit provided in the casing for rotating the rotating cleaning body, and a drive unit in the casing. A braking mechanism provided near the part,
The braking mechanism contacts the surface to be cleaned when the casing is placed on the surface to be cleaned and is in a non-cleaning state when the casing is separated from the surface to be cleaned. The contact member contacts the drive unit when in the non-cleaning state, thereby applying a load of a predetermined value or more to the drive unit, and when in the cleaning state, the contact member contacts the drive unit. The contact member is configured to release the load by contacting the surface to be cleaned,
The drive unit includes a drive motor,
The vacuum cleaner main body includes a control unit that controls the drive motor to drive or stop,
A vacuum cleaner is provided in which the control unit stops the drive motor that is being driven based on a current value of the drive motor when a load equal to or greater than the predetermined value is applied to the drive motor.

According to the present invention, size reduction can be achieved.

FIG. 1 is a perspective view of a first embodiment of a vacuum cleaner according to the present invention. It is a block diagram explaining the control system of the vacuum cleaner of a 1st embodiment. It is a perspective view of the suction port body in the vacuum cleaner of 1st Embodiment. It is a partial left sectional view of the suction port body of 1st Embodiment. It is a sectional view seen from the front side explaining the state where the suction port object of a 1st embodiment was placed on the surface to be cleaned. FIG. 2 is a cross-sectional view of the first embodiment when viewed from the front side, illustrating a state in which the suction port body is lifted from the surface to be cleaned. It is a sectional view seen from the right side explaining the state where the suction mouth body of a 1st embodiment was placed on the surface to be cleaned. It is a sectional view seen from the right side explaining a state in which the suction port body of a 1st embodiment floats from a surface to be cleaned. It is a sectional view seen from the right side explaining the state where the suction mouth body of a 2nd embodiment was placed on the surface to be cleaned. It is a sectional view seen from the right side explaining the state where the suction mouth body of a 2nd embodiment floats from the surface to be cleaned. It is a sectional view seen from the right side side explaining the state where the suction mouth body of a 2nd embodiment is raised from the surface to be cleaned, and is turned over.

Hereinafter, this invention will be explained in further detail using the drawings. Note that the following description is illustrative in all respects and should not be construed as limiting the invention.

(First embodiment)
FIG. 1 is a perspective view of a first embodiment of a vacuum cleaner according to the present invention, and FIG. 2 is a block diagram illustrating a control system of the vacuum cleaner of the first embodiment. Moreover, FIG. 3 is a perspective view of the suction port body in the vacuum cleaner of 1st Embodiment, FIG. 4 is a partial left sectional view of the suction port body of 1st Embodiment. In Figures 1, 3, and 4, arrows indicate the front, back, left, right, top, and bottom directions when the vacuum cleaner and the suction port are in use, and the configuration of the vacuum cleaner and the suction port is based on these directions. It is explained as follows.

As shown in FIGS. 1 and 2, this vacuum cleaner 1 includes a vacuum cleaner body 10, a battery 40 that is detachably attached to the vacuum cleaner body 10, and one end that is detachably connected to the vacuum cleaner body 10. 61a, a suction port body 70 detachably connected to the other end 61b of the extension tube 60, and a plurality of conductive cables provided from the vacuum cleaner body 10 to the suction port body 70. This is a stick type cordless vacuum cleaner 1 including wiring parts 26, 62, and 76.
In addition, the vacuum cleaner 1 shown in FIG. 1 can also be used as a handy type by directly connecting the suction opening body 70 to the vacuum cleaner main body 10 without using the extension tube 60.

The vacuum cleaner main body 10 includes a suction section 20 that includes an electric blower 22 and sucks dust, and a dust collection section 30 that is detachably attached to the suction section 20 and captures the sucked dust.

The suction section 20 includes an electric blower housing section 21a that houses a circuit board constituting the control section 23 and the electric blower 22. In the vacuum cleaner 1 in the upright state, the suction section 20 includes a handle section 21b provided above the electric blower storage section 21a, a battery mounting section 21c provided at the rear of the electric blower storage section 21a, and an electric blower storage section 21c. It includes a pipe portion 21d provided below the blower storage portion 21a, and an operation switch portion 21e provided on the pipe portion 21d side of the handle portion 21b.

The control unit 23 is electrically connected to the battery 40 via a conductive cable (not shown), and is electrically connected to the electric blower 22 via a conductive cable 25.
Further, in the vacuum cleaner main body 10, the electric wiring section 26 is provided, which is electrically connected to the control section 23, from the electric blower storage section 21a of the suction section 20 to the pipe section 21d. A plurality of connection terminals 26a electrically connected to the electrical wiring section 26 are provided at the tip opening. In this embodiment, a clip-type terminal is used as the connection terminal 26a. Note that the conductive cable 25 may be included as a part of the electrical wiring section 26.

The extension tube 60 includes a tube body 61 and the electrical wiring section 62 provided along the tube body 61.
Further, a plurality of first connection terminals 62a electrically connected to the electrical wiring section 62 are provided on the one end 61a side of the tube body 61, and the electrical wiring section 62 and the electrical connection terminals 62a are provided on the other end 61b side of the tube body 61. A plurality of second connection terminals 62b are provided which are connected to each other. In this embodiment, a pin-type terminal is used as the first connection terminal 62a, and a clip-type terminal is used as the second connection terminal 62b.

As shown in FIGS. 1 to 4, the suction port body 70 includes a suction port main body 71, a joint portion 78 rotatably coupled to the suction port main body 71 about a first axis P1 in the front-rear direction, and a A connecting pipe part 79 rotatably coupled to the joint part 78 about a second axis P2 perpendicular to the first axis P1, and the electric wiring part provided from the suction port main body 71 to the connecting pipe part 79. 76. Further, a connecting terminal 76a electrically connected to the electric wiring section 76 is provided on the connecting end side of the connecting tube section 79 with the extension tube 60. Note that in this embodiment, a pin-type terminal is used as the connection terminal 76a.

The suction port body 71 includes a casing 71F having a front portion 71x extending in the left-right direction and having a suction port 71a at the bottom, and a rear protruding portion 71y protruding rearward from a middle portion in the left-right direction of the front portion 71x. .
The front portion 71x includes a brush-like rotating cleaning body 72 rotatably provided near the suction port 71a around a third axis P3 in the left-right direction, a drive motor 73 for rotating the rotating cleaning body 72, and a drive motor 73 for rotating the rotating cleaning body 72. A power transmission mechanism 74 and the like that transmits the rotational force of the output shaft of the motor 73 to the rotating cleaning body 72 is provided.
A rear roller 71b is provided on the rear protrusion 71y so as to be rotatable about a fourth axis P4 in the left-right direction.

The drive motor 73 is electrically connected to the electrical wiring section 76.
The power transmission mechanism 74 includes a first pulley 74a provided on the output shaft of the drive motor 73, a second pulley 74b provided on the left end of the shaft 72a of the rotating cleaning body 72, and a first pulley 74a and a second pulley 74b. It has a timing belt 74c that connects the pulley 74b. Note that the power transmission mechanism 74 may be composed of a plurality of gears.

FIG. 5 is a sectional view of the suction port body of the first embodiment placed on the surface to be cleaned, as seen from the front side, and FIG. 6 is a sectional view of the suction port body of the first embodiment placed on the surface to be cleaned. It is a sectional view seen from the front side explaining a state where it floats up. Further, FIG. 7 is a cross-sectional view of the suction port body of the first embodiment as seen from the right side, illustrating a state in which the suction port body of the first embodiment is placed on the surface to be cleaned, and FIG. It is a sectional view seen from the right side side explaining a state where it floats from a cleaning surface. In FIGS. 5 to 8, arrows indicate the front, rear, left, right, top, and bottom directions of the suction port when the suction port is in use, and the structure of the suction port will be explained based on these directions.

The rotary cleaning body 72 includes a shaft portion 72a, a plurality of brush portions 72b spirally provided along the outer circumferential surface of the shaft portion 72a, and a brush portion 72b inside the housing 71F so as to rotatably support both ends of the shaft portion 72a. It has a pair of bearing parts 72c attached to.
The shaft portion 72a includes a large-diameter shaft portion 72aa provided with a plurality of brush portions 72b, and a pair of left and right small-diameter shaft portions 72ab, 72ac protruding outward from both left and right ends of the large-diameter shaft portion 72aa on a third axis P3. and a pair of left and right shaft core portions 72ad and 72ae that protrude outward from the ends of the left and right small diameter shaft portions 72ab and 72ac on the third shaft center P3.
The left and right bearing parts 72c are each formed into a substantially square shape when viewed from the direction of the third axis P3, and are attached to the left and right axis parts 72ad and 72ae of the shaft part 72a via bearings (not shown). There is.

In the housing 71F of the suction port body 70, the front portion 71x includes a bottom wall 71xa provided with the suction port 71a, left and right side walls 71xb and 71xc, and a top wall 71xd.
Further, a pair of left and right concave holding portions 71xe that hold the left and right bearing portions 72c of the rotary cleaning body 72 on the third axis P3 are provided on the inner surfaces of the left and right side walls 71xb and 71xc.
By fitting and holding the left and right bearing parts 72c of the rotary cleaning body 72 into these left and right concave holding parts 71xe, the shaft part 72a becomes rotatable with respect to the left and right bearing parts 72c as fixed parts. There is.

In the rotary cleaning body 72, the second pulley 74b of the power transmission mechanism 74 is provided on the left small diameter shaft portion 72ab. Thereby, the output of the drive motor 73 (see FIG. 4) is transmitted to the shaft portion 72a of the rotary cleaning body 72 via the power transmission mechanism 74, and the rotary cleaning body 72 is rotated. In addition, inside the front part 71x of the housing 71F, a partition wall 71xw that shields the storage space of the power transmission mechanism 74 from the suction port 71a is located between the large diameter shaft part 72aa and the second pulley 74b. It is provided so that the shaft portion 72ab is inserted therethrough.

As shown in FIGS. 5 to 8, in the casing 71F of the suction port body 70, the inside of the front portion 71x is located near the rotating cleaning body 72, specifically, the small diameter shaft portion 72ac on the right side of the shaft portion 72a. A braking mechanism 75 capable of braking the rotation of the rotary cleaning body 72 is provided nearby.
The braking mechanism 75 contacts the surface to be cleaned F when the casing 71F is placed on the surface to be cleaned F (see FIGS. 5 and 7), and when the casing 71F is placed on the surface to be cleaned F. It has a contact member 75a that comes into contact with the rotating cleaning body 72 when it is in a non-cleaning state away from the cleaning body (see FIGS. 6 and 8).
Further, the braking mechanism 75 includes a biasing member 75b that biases the contact member 75a in the direction of contacting the rotary cleaning body 72.

This braking mechanism 75 is activated by the drive motor 73 (see FIGS. 2 and 4) via the rotary cleaning body 72 when the contact member 75a contacts the rotating cleaning body 72 in the non-cleaning state (see FIGS. 6 and 8). ) is applied with a load of a predetermined value or more, and when the contact member 75a comes into contact with the surface to be cleaned F in the cleaning state (see FIGS. 5 and 7), the load is released.

In the braking mechanism 75, the contact member 75a is a plate-like member that is movably provided within the front part 71x of the housing 71F, and is a shaft through which the small-diameter shaft portion 72ac on the right side of the shaft portion 72a of the rotary cleaning body 72 is inserted. It has an insertion hole 75h.
The shaft insertion hole 75h has a contact hole portion 75ha whose peripheral edge contacts the right small diameter shaft portion 72ac in the non-cleaning state (see FIGS. 6 and 8), and a contact hole portion 75ha in the cleaning state (see FIGS. 5 and 7). The peripheral edge portion includes a non-contact hole portion 75hb that is not in contact with the right small diameter shaft portion 72ac. Note that the right small diameter shaft portion 72ac has a circular outer circumferential surface when viewed from the direction of the third axis P3.

The non-contact hole portion 75hb is a partially circular hole having an inner diameter slightly larger than the outer diameter of the right small diameter shaft portion 72ac of the rotary cleaning body 72, and the contact hole portion 75ha has an outer diameter slightly larger than the outer diameter of the right small diameter shaft portion 72ac. It is a partially circular hole with an inner diameter that is approximately the same as that of the hole. That is, the size of the non-contact hole portion 75hb is larger than the size of the contact hole portion 75ha.

FIG. 7 shows a state in which the third axis P3 and the axis of the non-contact hole 75hb substantially coincide, and FIG. 8 shows a state in which the third axis P3 and the axis of the contact hole 75ha substantially coincide. It shows. As is clear from these FIGS. 7 and 8, the shaft insertion hole 75h is formed in such a way that approximately the upper half of the small diameter shaft portion 72ac on the right side of the rotary cleaning body 72 contacts the contact hole portion 75ha. It has a long hole shape in which the contact hole portion 75hb overlaps with the contact hole portion 75hb.

Further, as shown in FIGS. 5 to 8, the contact member 75a includes a body portion 75aa provided with a shaft insertion hole 75h, and leg portions 75ab protruding from the body portion 75aa toward the suction port 71a side of the housing 71F. It has a buffer part 75ac provided at the tip of the leg part 75ab, and a boss part 75ad provided at the end of the body part 75aa on the opposite side from the leg part 75ab. Note that, for example, a raised cloth can be used as the buffer portion 75ac.

The biasing member 75b is, for example, a compression coil spring, and the compression coil spring is positioned in a space between the boss portion 75ad of the contact member 75a and the front portion 71x of the casing 71F, and the biasing member 75b is placed on the suction port 71a side. It is biased in the direction of movement. Note that a plate spring or an elastic foam may be used instead of the compression coil spring.

As shown in FIGS. 7 and 8, a support rib 71xr that supports the braking mechanism 75 so as to be movable in a linear direction is provided inside the front portion 71x of the housing 71F.
The support rib 71xr extends downward (toward the suction port 71a side) from the upper inner surface of the front portion 71x so as to cover the front and rear sides of the contact member 75a, and extends upward and downward from the front and rear sides of the body portion 75aa of the contact member 75a. It has a pair of front and rear grooves 71xg that are slidably fitted into the grooves 71xg. Further, the support rib 71xr has an insertion hole 71xh through which the leg portion 75ab of the contact member 75a can be vertically slidably inserted. Note that in FIGS. 5 and 6, illustration of the support rib 71xr is omitted.

Next, operation control of the vacuum cleaner 1 including the suction port body 70 of the first embodiment will be described with reference to FIGS. 1 to 8.
In the cleaning state of the vacuum cleaner 1, the suction port body 70 is placed on the surface to be cleaned F, and the electric blower 22 is driven to generate suction force, and the drive motor 73 is driven to rotate the cleaning body 72. rotates. At this time, as shown in FIG. 5 and FIG. direction). Therefore, the axis of the non-contact hole 75hb of the contact member 75a substantially coincides with the third axis P3 of the rotary cleaning body 72, and the inner peripheral edge of the shaft insertion hole 75h (non-contact hole 75hb) of the contact member 75a. is in a non-contact state with the right small diameter shaft portion 72ac.

In the cleaning state, when the suction port body 70 is moved in the front-back direction on the surface F to be cleaned, the buffer portion 75ac provided on the leg portion 75ab of the contact member 75a of the braking mechanism 75 smoothly slides into contact with the surface F to be cleaned. .
Further, in the cleaning state, the boss portion 75ad of the contact member 75a serves as a stopper and is in contact with the housing 71F. Thereby, in the cleaning state in which the suction port body 70 is placed on the surface to be cleaned F, the contact member 75a is located at a predetermined position in the cleaning state. That is, the contact member 75a is restricted from moving above a predetermined position so that the inner peripheral edge of the non-contact hole 75hb of the contact member 75a does not come into contact with the small diameter shaft portion 72ac on the right side of the rotary cleaning body 72. . In other words, the boss portion 75ad of the contact member 75a restricts the movement of the non-contact hole portion 75hb in the direction toward the lower half portion of the small diameter shaft portion 72ac.

From this cleaning state (operating state), as shown in FIGS. 6 and 8, when the suction port body 70 is lifted up and released from the surface to be cleaned F, it becomes a non-cleaning state, and at this time, the biasing member 75b of the braking mechanism 75 The contact member 75a moves in the biasing direction (toward the suction port 71a side) due to the biasing force. At this time, the lower part of the body 75aa of the contact member 75a comes into contact with the bottom 71xq of the support rib 71xr, and its downward movement is restricted.

As a result, the inner circumferential edge of the contact hole 75ha of the contact member 75a comes into contact with the small diameter shaft portion 72ac on the right side of the rotary cleaning body 72, thereby transmitting a predetermined value to the drive motor 73 via the rotary cleaning body 72 and the power transmission mechanism 74. It takes more load than that. Note that the contact member 75a can be made of a resin material, but at least the inner peripheral edge of the contact hole 75ha is made of a material that has a large frictional resistance with the small diameter shaft portion 72ac (for example, rubber, brushed fabric, etc.). It may be.

Here, the load greater than the predetermined value is, for example, cleaning a surface to be cleaned (for example, a carpet, a long-pile rug, a mat, etc.) that has relatively high frictional resistance with the rotating cleaning body 72. This means a load that is sometimes larger than the load applied to the drive motor 73.
When a load of a predetermined value or more is applied to the drive motor 73, the current value of the drive motor 73 increases to a predetermined current value or more.

The control unit 23 of the vacuum cleaner main body 10 reads the current value of the drive motor 73 while it is being driven, and stops the drive motor 73 when the current value exceeds a predetermined value when a load of a predetermined value or more is applied to the drive motor 73. do.
That is, when the suction port body 70 changes from the cleaning state to the non-cleaning state, the braking mechanism 75 applies a load of a predetermined value or more to the drive motor 73, which causes the control unit 23 to increase the current value of the drive motor 73 to a predetermined current value or more. Based on this, at least the drive motor 73 is stopped to stop the rotation of the rotary cleaning body 72. Note that the control unit 23 may control the drive motor 73 and the electric blower 22 to drive or stop the drive motor 73 and the electric blower 22 synchronously.

In this way, the rotating cleaning body 72 can be stopped with safety in mind when not cleaning by using the braking mechanism 75 having a relatively simple configuration. At this time, even if the suction port body 70 raised from the surface F to be cleaned is turned over, the state in which the contact member 75a is pressed against the small diameter shaft portion 72ac of the rotary cleaning body 72 is maintained by the biasing member 75b. That is, the biasing member 75b has a biasing force that can maintain the state in which the contact member 75a is pressed against the small diameter shaft portion 72ac of the rotary cleaning body 72 even when the suction port body 70 is turned over.

Further, when the suction port body 70 lifted from the surface to be cleaned F is returned to the cleaning state where it is placed on the surface to be cleaned F again as shown in FIGS. 5 and 7, the non-contact hole portion 75hb is By moving to the side, the contact member 75a comes out of contact with the small diameter shaft portion 72ac, and the load of more than a predetermined value applied to the rotary cleaning body 72 is released. After returning the suction port body 70 to the cleaning state again, the user can switch to the operation mode using the operation switch section 21e to drive the stopped drive motor 73 and the electric blower 22. Alternatively, if the time from when the suction port body 70 changes from the cleaning state to the cleaning state and returns to the cleaning state again is within a predetermined time (for example, within 5 seconds), the user does not have to operate the operation switch part 21e. Alternatively, the control may be such that the drive motor 73 and the electric blower 22 that are stopped are automatically driven.

(Modified example of the first embodiment)
The control for completely stopping the rotary cleaning body 72 in the non-cleaning state as described above may be changed as follows. That is, in the non-cleaning state of the suction port body 70, the control unit 23 controls the output of the drive motor 73 to be suppressed so that the rotation speed of the rotary cleaning body 72, which is braked by the braking mechanism 75, decreases to a predetermined rotation speed. You may. Moreover, when the suction port body 70 returns to the cleaning state, the load on the rotary cleaning body 72 is released, and as a result, the current value of the drive motor 73 changes (the current value decreases), and the control unit 23 controls the current value. The output of the drive motor 73 may be controlled to increase based on the fluctuation in the number of rotations of the rotary cleaning body 72 to increase to the normal number of rotations.

(Second embodiment)
FIG. 9 is a cross-sectional view of the suction port body of the second embodiment placed on the surface to be cleaned, as seen from the right side, and FIG. 10 is a sectional view of the suction port body of the second embodiment placed on the surface to be cleaned. FIG. 11 is a sectional view seen from the right side illustrating a state in which the suction port body of the second embodiment is lifted from the surface to be cleaned and turned over; FIG. It is. Note that in FIGS. 9 to 11, elements similar to those in FIGS. 7 and 8 are given the same reference numerals. Further, in FIGS. 9 to 11, arrows indicate front, rear, left, right, up and down directions of the suction port when the suction port is in use, and the structure of the suction port will be explained based on these directions.
The suction port body 170 of the second embodiment has a configuration similar to that of the first embodiment except that the configuration of the braking mechanism 175 is different from that of the first embodiment. Hereinafter, differences between the second embodiment and the first embodiment will be mainly described.

As shown in FIGS. 9 and 10, in the suction port body 170 of the second embodiment, the braking mechanism 175 includes a contact member 175a similar to the contact member 75a of the braking mechanism 75 in the first embodiment. The biasing member 75b of the braking mechanism 75 in the embodiment is omitted (see FIG. 7).
In this braking mechanism 175, the contact member 175a is movable in the direction of gravity due to its own weight.

The contact member 175a has a shaft insertion hole 175h having a contact hole portion 175ha and a non-contact hole portion 175hb that correspond to the contact hole portion 75ha and the non-contact hole portion 75hb in the shaft insertion hole 75h of the contact member 75a of the first embodiment. are doing.
Further, the contact member 175a is provided with a pair of claw-shaped small protrusions 175hc at the front and back boundary between the contact hole portion 175ha and the non-contact hole portion 175hb at the inner peripheral edge of the shaft insertion hole 175h. In this case, the contact member 175a is made of an elastically deformable material (for example, rubber, elastic resin, etc.) in which at least the pair of claw-shaped small protrusions 175hc are formed.

As shown in FIG. 10, in the non-cleaning state, a pair of claw-shaped small protrusions 175hc are arranged so that the contact member 175a comes into contact with an area extending slightly beyond the upper half of the small-diameter shaft portion 72ac of the rotary cleaning body toward the lower half. The contact surface with the small diameter shaft portion 72ac is curved continuously with the inner peripheral edge of the contact hole portion 175ha.
Further, in the contact member 175a, a weight 175ae (for example, a metal weight) is embedded inside the leg portion 175ab, and a stopper convex portion 175ad is provided at the upper end of the body portion 175aa to restrict upward movement of the contact member 175a. It is being

Next, operation control of a vacuum cleaner including the suction port body 170 of the second embodiment will be described with reference to FIGS. 1, 2, 9, and 10.
In the cleaning state of the vacuum cleaner of the second embodiment, as shown in FIG. 9, the suction port body 170 is placed on the surface to be cleaned F, and the electric blower 22 is driven to generate suction force. The drive motor 73 is driven and the rotary cleaning body 72 is rotated. At this time, the contact member 175a of the braking mechanism 175 is moving in the direction in which it is pressed by the surface to be cleaned F (the direction opposite to the suction port 71a). Therefore, the axis of the non-contact hole 175hb of the contact member 175a substantially coincides with the third axis P3 of the rotary cleaning body 72, and the inner peripheral edge of the shaft insertion hole 175h (non-contact hole 175hb) of the contact member 175a. is in a non-contact state with the small diameter shaft portion 72ac.

At this time, the tips of the pair of claw-shaped small protrusions 175hc are pressed by the small diameter shaft portion 72ac and are elastically deformed. That is, in the contact member 175a in the cleaning state, only the pair of claw-shaped small protrusions 175hc are in contact with the small diameter shaft portion 72ac. At this time, the load applied to the drive motor 73 via the rotating cleaning body 72 and the power transmission mechanism 74 is smaller than the load of the predetermined value or more described in the first embodiment, so the current value of the drive motor 73 is The current does not rise above the specified value.

In the cleaning state, when the suction port body 170 is moved in the front-rear direction on the surface F to be cleaned, the buffer portion 75ac provided on the leg portion 175ab of the contact member 175a of the braking mechanism 175 smoothly slides into contact with the surface F to be cleaned. .
Further, in the cleaning state, the stopper convex portion 175ad of the contact member 175a serves as a stopper and is in contact with the housing 71F. Thereby, in the cleaning state in which the suction port body 170 is placed on the surface to be cleaned F, the contact member 175a is located at a predetermined position in the cleaning state. That is, the contact member 175a is restricted from moving above a predetermined position so that the inner peripheral edge of the non-contact hole 175hb of the contact member 175a does not contact the small diameter shaft portion 72ac of the rotary cleaning body 72. In other words, the stopper convex portion 175ad of the contact member 175a restricts the movement of the non-contact hole portion 175hb in the direction toward the lower half portion of the small diameter shaft portion 72ac.

From this cleaning state (operating state), as shown in FIG. move in the direction (downward). At this time, the lower portion of the body portion 175aa of the contact member 175a comes into contact with the bottom portion 71xq of the support rib 71xr, and its downward movement is restricted. Further, the pair of claw-shaped small protrusions 175hc return to the shape before elastic deformation.

As a result, in addition to the pair of claw-shaped small protrusions 175hc, the inner peripheral edge of the contact hole 175ha of the contact member 175a comes into contact with the small diameter shaft portion 72ac of the rotary cleaning body 72, thereby causing the rotary cleaning body 72 and the power transmission mechanism 74 to A load of a predetermined value or more is applied to the drive motor 73 through this. Note that the material of the inner peripheral edge of the contact hole portion 75ha of the contact member 175a may be the same material as the pair of claw-shaped small protrusions 175hc (for example, rubber, elastic resin, etc.).
When a load of a predetermined value or more is applied to the drive motor 73, the current value of the drive motor 73 increases to a predetermined current value or more, and the control unit 23 of the vacuum cleaner main body 10 stops the drive motor 73, as in the first embodiment. do. In this case as well, the control unit 23 may control the drive motor 73 and the electric blower 22 to drive or stop the drive motor 73 and the electric blower 22 synchronously.

In this manner, in the second embodiment as well, the rotary cleaning body 72 can be stopped with safety in mind when not cleaning by the braking mechanism 175 having a relatively simple configuration. At this time, as shown in FIG. 11, even if the suction port body 170 raised from the surface to be cleaned F is turned over, the pair of claw-shaped small protrusions 175hc are part of the upper half of the small diameter shaft portion 72ac at this time. Since the contact member 175a is in contact with the contact member 175a so as to embrace the contact member 175a, the contact member 175a does not descend due to its own weight (move in the direction of gravity). That is, even when the suction port body 170 is turned over, the pair of claw-shaped small protrusions 175hc can maintain the state in which the contact hole portion 175ha is pressed against the small diameter shaft portion 72ac of the rotary cleaning body 72 while supporting the weight of the contact member 175a. It has elasticity that adds elasticity.

Further, when the suction port body 170 lifted from the surface to be cleaned F is returned to the cleaning state where it is placed on the surface to be cleaned F again as shown in FIG. 9, the non-contact hole portion 175hb moves toward the small diameter shaft portion 72ac. As a result, only the pair of claw-shaped small protrusions 175hc come into contact with the small diameter shaft portion 72ac, and the load on the rotary cleaning body 72 that exceeds the predetermined value is released. After returning the suction port body 170 to the cleaning state again, the user can switch to the operation mode using the operation switch section 21e and drive the stopped drive motor 73 and electric blower 22. Alternatively, if the time from when the suction port body 170 changes from the cleaning state to the cleaning state and returns to the cleaning state again is within a predetermined time (for example, within 5 seconds), the user does not have to operate the operation switch part 21e. Alternatively, the control may be such that the drive motor 73 and the electric blower 22 that are stopped are automatically driven.

Note that the pair of claw-shaped small projections 175hc of the contact member 175a of the braking mechanism 175 may be omitted. In this case, as shown in FIG. 11, when the suction port body 170 lifted from the surface to be cleaned F is turned over, the contact member 175a descends due to its own weight, thereby causing the contact member 175a to be in a non-contact state with the small diameter shaft portion 72ac. becomes. At this time, the stopped drive motor 73 and electric blower 22 will not be driven again unless the user operates the operation switch section 21e to switch to the operation mode. Alternatively, the control may be such that the drive motor 73 and the electric blower 22 that are currently stopped are automatically driven as described above. However, in this case, when the suction port body 170 is turned over, the contact member 175a descends due to its own weight and the contact member 175a is in a non-contact state with the small diameter shaft portion 72ac, so it is detected that the suction port body 170 is turned over. A sensor (for example, a gyro sensor) is provided in the suction port body 170 to control the stopped drive motor 73 and the electric blower 22 so that they are not automatically driven in the upside down state.

(Modified example of second embodiment)
The control for completely stopping the rotary cleaning body 72 in the non-cleaning state as described above may be changed as follows. That is, in the suction port body 170 of the second embodiment as well, in the non-cleaning state of the suction port body 170, the control unit 23 controls the rotational cleaning that is braked by the braking mechanism 75, as in the modification of the first embodiment. The output of the drive motor 73 may be controlled to be suppressed so that the rotation speed of the body 72 decreases to a predetermined rotation speed. Further, when the suction port body 170 returns to the cleaning state, the load on the rotary cleaning body 72 is released, and as a result, the current value of the drive motor 73 changes (the current value decreases), and the control unit 23 controls the current value. The output of the drive motor 73 may be controlled to increase based on the fluctuation in the number of rotations of the rotary cleaning body 72 to increase to the normal number of rotations.

(Third embodiment)
In the first and second embodiments, the suction port body is provided with a braking mechanism that contacts and brakes the rotating cleaning body when it is in a non-cleaning state, but the braking mechanism of the first or second embodiment For example, the drive unit of the rotary cleaning body may be braked by applying this method. For example, when the suction port is in a non-cleaning state, the contact member contacts the timing belt of the pulley-belt mechanism, which is the power transmission mechanism, and brakes it, and when the suction port is in the cleaning state, the braking mechanism is set so that the contact member separates from the timing belt. may be configured. Alternatively, the braking mechanism may be configured to apply braking by contacting the output shaft of the drive motor, and release the braking by separating from the output shaft of the drive motor.

(Fourth embodiment)
In the first and second embodiments, the suction port body includes a motor-driven rotary cleaning body, but the suction port body of the third embodiment includes a turbine-driven rotary cleaning body and the first or second embodiment. The brake mechanism described in the second embodiment is provided.
In the case of the third embodiment, when the suction port body changes from the cleaning state to the non-cleaning state, the rotation speed of the rotating rotating cleaning body decreases due to the frictional resistance generated when the contact member contacts the rotating cleaning body.

(summary)
A suction port body of a vacuum cleaner according to the present invention includes: a housing having a suction port; a rotating cleaning body rotatably provided in the vicinity of the suction port within the housing; comprising: a drive unit that rotates the cleaning body; and a braking mechanism provided near the rotating cleaning body within the housing;
The braking mechanism contacts the surface to be cleaned when the casing is placed on the surface to be cleaned and is in a non-cleaning state when the casing is separated from the surface to be cleaned. a contact member that contacts the cleaning body, and when the contact member comes into contact with the rotary cleaning body in the non-cleaning state, applying a load of a predetermined value or more to the drive unit via the rotary cleaning body; Further, the contact member is configured to release the load by contacting the surface to be cleaned during the cleaning state.

According to this configuration, the braking mechanism can be provided in the existing space in the housing of the suction port body in which the rotary cleaning body is provided, so that a dedicated space for the braking mechanism is not required. In other words, since there is no need for a dedicated space for installing a safety switch inside the housing as in Patent Document 1, a simple interior with plenty of space for the drive unit and the circuit board that controls the drive unit within the housing is required. It can be a structure.
In addition, since the braking mechanism is a mechanism that can brake by directly contacting the rotating cleaning body, the cost is lower than that of the suction port body equipped with a safety switch (electrical component) as in Patent Document 1, and it is easier to assemble parts. It is possible to simplify the wiring work, simplify the wiring work, and reduce the weight and size.

The suction port body of the vacuum cleaner of the present invention may be configured as follows, and these may be combined as appropriate.

- The rotary cleaning body has a shaft part rotated by the drive part, and a bearing part installed in the housing so as to rotatably support both ends of the shaft part,
The braking mechanism includes the contact member movably provided within the housing, and a shaft insertion hole provided in the contact member so as to allow the shaft portion to be inserted therethrough, and the braking mechanism has The contact member moves so that the inner peripheral edge of the shaft insertion hole of the contact member comes into contact with the shaft part, and the contact member moves so that the inner peripheral edge of the shaft insertion hole of the contact member moves away from the shaft part in the cleaning state. may be moving.
According to this configuration, the contact member of the braking mechanism can be provided in the rotating cleaning body space within the casing of the suction port body.

- The braking mechanism further includes a biasing member that biases the contact member in a direction to bring the inner peripheral edge into contact with the shaft portion,
When the contact member moves in the biasing direction of the biasing member in the non-cleaning state, the inner peripheral edge contacts the shaft portion, and in the cleaning state, the contact member moves against the biasing force. The inner peripheral edge may be separated from the shaft portion by moving the contact member in a direction in which it is pressed by the surface to be cleaned.
According to this configuration, when in the non-cleaning state, the contact member is brought into contact with the shaft portion using the urging force of the urging member to brake the rotary cleaning body, and when in the cleaning state, the rotating cleaning body is braked by using the urging force of the urging member. Accordingly, it is possible to obtain a braking mechanism with a simple structure that can release the braking of the rotary cleaning body by using the force of the contact member being pressed against the surface to be cleaned.

- When the contact member moves in the direction of gravity due to its own weight in the non-cleaning state, the inner peripheral edge contacts the shaft portion, and in the cleaning state, the contact member is pressed by the surface to be cleaned. The inner circumferential edge may be separated from the shaft portion by moving in the direction in which the inner peripheral edge is moved.
According to this configuration, it is possible to obtain a braking mechanism with a simpler configuration that allows the contact member to brake or release the brake on the rotary cleaning body by utilizing the weight of the contact member itself in the non-cleaning state or the cleaning state. Can be done.

- The drive section includes a drive motor or a turbine, and a power transmission mechanism that transmits the rotational force of the drive motor or the turbine to one end side of the shaft section of the rotary cleaning body,
The contact member may be arranged on the other end side of the shaft portion opposite to the one end side.
According to this configuration, the braking mechanism can be provided in a space in the housing opposite to the space in which the power transmission mechanism is provided.

- The shaft insertion hole includes a contact hole portion in which the peripheral edge portion contacts the shaft portion in the non-cleaning state, and a contact hole portion in which the peripheral edge portion does not contact the shaft portion in the cleaning state. The non-contact hole portion may have a larger size than the non-contact hole portion.
According to this configuration, the braking mechanism is configured to brake the rotary cleaning body when the contact member moves linearly in one direction, and release the brake on the rotary cleaning body when the contact member moves linearly in the other direction (opposite direction). Can be configured.

Further, the vacuum cleaner of the present invention includes a vacuum cleaner body that sucks and collects dust, and the suction port body that is connected to the vacuum cleaner body directly or via an extension tube.
According to this configuration, it is possible to obtain a vacuum cleaner equipped with a suction port body that exhibits the above-mentioned effects.
In this case, the drive unit includes a drive motor,
The vacuum cleaner main body includes a control unit that controls the drive motor to drive or stop,
The control unit may stop the drive motor that is being driven based on a current value of the drive motor when a load equal to or greater than the predetermined value is applied to the drive motor.
According to this configuration, during operation of the vacuum cleaner, the control unit can drive or stop the drive motor based on the current value of the drive motor that changes when the rotary cleaning body is braked by the brake mechanism.

Another vacuum cleaner of the present invention includes a vacuum cleaner body that sucks and collects dust, and a suction port body that is connected to the vacuum cleaner body directly or via an extension pipe, the suction port body being connected to the vacuum cleaner body directly or via an extension pipe. , a casing having a suction port, a rotary cleaning body rotatably provided in the vicinity of the suction port within the casing, a drive unit provided within the casing and rotating the rotary cleaning body, and the casing. a braking mechanism provided near the drive unit in the body,
The braking mechanism contacts the surface to be cleaned when the casing is placed on the surface to be cleaned and is in a non-cleaning state when the casing is separated from the surface to be cleaned. The contact member contacts the drive unit when in the non-cleaning state, thereby applying a load of a predetermined value or more to the drive unit, and when in the cleaning state, the contact member contacts the drive unit. The contact member is configured to release the load by contacting the surface to be cleaned,
The drive unit includes a drive motor,
The vacuum cleaner main body includes a control unit that controls the drive motor to drive or stop,
The control unit stops the drive motor that is being driven based on a current value of the drive motor when a load equal to or greater than the predetermined value is applied to the drive motor.
According to this configuration, the braking mechanism can be provided in a space near the space in which the power transmission mechanism is provided inside the housing.

Further, in the other vacuum cleaner, the drive unit includes a power transmission mechanism that transmits the rotational force of the drive motor to the rotating cleaning body,
The braking mechanism has the contact member movably provided within the housing, and the contact member moves such that the contact member comes into contact with the power transmission mechanism in the non-cleaning state, and The contact member may move away from the power transmission mechanism during the cleaning state.
According to this configuration, for example, when the power transmission mechanism is a pulley-belt mechanism, the contact member is brought into contact with the belt to brake the rotation of the rotating cleaning body, and the contact member is separated from the belt to brake the rotation of the rotating cleaning body. can be configured to release the brakes.

Preferred embodiments of the invention include combinations of any of the above-mentioned embodiments.
In addition to the embodiments described above, there may be various modifications of this invention. Such variations are not to be construed as falling outside the scope of this invention. This invention should include the meaning equivalent to the scope of the claims and all modifications within the said scope.

1: Vacuum cleaner, 10: Vacuum cleaner body, 20: Suction section, 21a: Electric blower storage section, 21b: Handle section, 21c: Battery mounting section, 21d: Pipe section, 21e: Operation switch section, 22: Electric blower , 23: Control section, 25: Conductive cable, 26: Electrical wiring section, 26a: Connection terminal, 30: Dust collection section, 40: Battery, 60: Extension tube, 61: Pipe body, 61a: One end, 61b: Other end , 62: Electrical wiring section, 62a: First connection terminal, 62b: Second connection terminal, 70: Suction port body, 71: Suction port body, 71b: Rear roller, 71F: Housing, 71x: Front part, 71xa: Bottom wall, 71xb: side wall, 71xc: side wall, 71xd: upper wall, 71xe: concave holding part, 71xg: groove, 71xh: insertion hole, 71xq: bottom, 71xr: support rib, 71xw: partition wall, 71y: rear protrusion Part, 72: Rotating cleaning body, 72a: Shaft portion, 72aa: Large diameter shaft portion, 72ab: Small diameter shaft portion, 72ac: Small diameter shaft portion, 72ad: Shaft core portion, 72ae: Shaft core portion, 72b: Brush portion, 72c : Bearing part, 73: Drive motor, 74: Power transmission mechanism, 74a: First pulley, 74b: Second pulley, 74c: Timing belt, 75: Braking mechanism, 75a: Contact member, 75aa: Body, 75ab: Legs part, 75ac: buffer part, 75ad: boss part, 75b: biasing member, 75h: shaft insertion hole, 75ha: contact hole part, 75hb: non-contact hole part, 76: electrical wiring part, 76a: connection terminal, 78: Joint part, 79: Connection pipe part, 170: Suction port body, 175: Braking mechanism, 175a: Contact member, 175aa: Body part, 175ab: Leg part, 175ad: Stopper convex part, 175ae: Weight, 175h: Shaft insertion hole , 175ha: Contact hole, 175hb: Non-contact hole, 175hc: Claw-shaped small projection, F: Surface to be cleaned, P1: First axis, P2: Second axis, P3: Third axis, P4: 4th axis center

Claims (8)

a casing having a suction port; a rotary cleaning body rotatably provided in the vicinity of the suction port within the casing; a drive unit provided within the casing for rotating the rotary cleaning body; a braking mechanism provided near the rotating cleaning body,
The braking mechanism is movably provided within the casing, and is in contact with the surface to be cleaned when the casing is placed on the surface to be cleaned and is in a cleaning state, and the braking mechanism is configured to be movable within the casing. It has a contact member that comes into contact with the rotary cleaning body when it is in a separate non-cleaning state, and the contact member contacts the rotary cleaning body when it is in the non-cleaning state, thereby causing the drive through the rotary cleaning body. and is configured to apply a load of a predetermined value or more to the part, and release the load by causing the contact member to come into contact with the surface to be cleaned during the cleaning state ,
The rotary cleaning body has a shaft portion rotated by the drive portion, and a bearing portion attached within the housing so as to rotatably support both ends of the shaft portion,
The contact member moves to be in contact with the shaft when in the non-cleaning state, and moves away from the shaft when in the cleaning state. Vacuum cleaner suction body. a casing having a suction port; a rotary cleaning body rotatably provided in the vicinity of the suction port within the casing; a drive unit provided within the casing for rotating the rotary cleaning body; a braking mechanism provided near the rotating cleaning body,
The braking mechanism contacts the surface to be cleaned when the casing is placed on the surface to be cleaned and is in a non-cleaning state when the casing is separated from the surface to be cleaned. a contact member that contacts the cleaning body, and when the contact member contacts the rotating cleaning body in the non-cleaning state, applying a load of a predetermined value or more to the drive unit via the rotating cleaning body; and configured to release the load by the contact member coming into contact with the surface to be cleaned during the cleaning state,
The rotating cleaning body has a shaft portion that rotates by the drive portion, and a bearing portion that is attached within the housing so as to rotatably support both ends of the shaft portion,
The braking mechanism has the contact member movably provided within the housing, and a shaft insertion hole provided in the contact member so as to allow the shaft portion to be inserted therethrough, and the braking mechanism has The contact member moves so that the inner peripheral edge of the shaft insertion hole of the contact member comes into contact with the shaft portion, and the contact member moves so that the inner peripheral edge of the contact member is separated from the shaft portion in the cleaning state. A suction port body characterized by moving. The braking mechanism further includes a biasing member that biases the contact member in a direction to bring the inner peripheral edge into contact with the shaft portion,
When the contact member moves in the biasing direction of the biasing member in the non-cleaning state, the inner peripheral edge contacts the shaft portion, and the biasing force of the biasing member in the cleaning state The suction port body according to claim 2, wherein the inner circumferential edge is separated from the shaft portion by moving the contact member in a direction in which the surface to be cleaned is pressed against the pressure. In the non-cleaning state, the contact member moves in the direction of gravity due to its own weight, so that the inner peripheral edge contacts the shaft portion, and in the cleaning state, the contact member is pressed by the surface to be cleaned. The suction port body according to claim 2, wherein the inner circumferential edge is separated from the shaft portion by moving in the direction of the suction port body. The drive section includes a drive motor or a turbine, and a power transmission mechanism that transmits the rotational force of the drive motor or the turbine to one end side of the shaft section of the rotary cleaning body,
The suction port body according to any one of claims 1 to 4, wherein the contact member is arranged on the other end side of the shaft portion opposite to the one end side. The shaft insertion hole includes a contact hole portion forming a part of the inner peripheral edge that contacts the shaft portion when in the non-cleaning state, and a contact hole portion forming a part of the inner peripheral edge that contacts the shaft portion when in the cleaning state . The suction port body according to any one of claims 2 to 4, further comprising a non-contact hole portion that is larger in size than the contact hole portion and forms a part of the inner peripheral edge . A vacuum cleaner comprising: a vacuum cleaner body that sucks and collects dust; and the suction port body according to any one of claims 1 to 6, which is connected to the vacuum cleaner body directly or via an extension tube. . The drive unit includes a drive motor,
The vacuum cleaner main body includes a control unit that controls the drive motor to drive or stop,
The vacuum cleaner according to claim 7, wherein the control unit stops the drive motor that is being driven based on a current value of the drive motor when a load equal to or greater than the predetermined value is applied to the drive motor.

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