JP2020127700A - Cleaner head - Google Patents

Abstract

To provide a cleaner head in which a front brush is raised as required to optimally keep cleaning effect and decrease an occupied area on a floor.SOLUTION: A cleaner head comprises: a drive motor 500 which is incorporated in a rear housing 200 and rotatably drives through a power transmission device 600 a front brush 700 and a rear brush 800; a lifting unit 300 which is arranged at one side of the rear housing to enable the front housing to move around a lifting hinge with respect to the rear housing; a sensing part 250 which is arranged in either of the front housing and the rear housing; and a sensing object part 150 which is arranged at the other one. While the front housing is expanded with respect to the rear housing, rotation power is transmitted from the drive motor to the front brush, and when the front housing is raised, the rotation power of the front brush is cut off to stop rotation.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaner head, and more particularly, to a cleaner head whose tip brush can be raised and lowered.

Generally, in a vacuum cleaner, a fan motor is installed inside, a main body that generates a suction force, an extension pipe whose one end is connected to the suction port side of the main body, and a free end of the extension pipe that are installed in the fan. A suction head that sucks foreign matter such as dust by a suction force of the motor is provided.

In recent years, many vacuum cleaners having a structure in which a brush is rotatably installed in a state where a brush projects from the bottom surface of the suction head and a drive motor for driving the brush is included are commercially available.

Further, there is disclosed a cleaner head that enhances the stirring effect of foreign matter by installing two brushes having different properties side by side in the front-rear direction to form a double brush (for example, Patent Document 1).

Korean Published Patent No. 10-2018-0072763

However, in the case of the vacuum cleaner head according to the conventional technique, the two brushes always hit the floor, and the optimum foreign matter suction effect according to the property of the floor surface cannot be obtained.

For example, when cleaning a carpet surface with a vacuum cleaner head consisting of a double brush having a carpet brush and a straight brush, the carpet brush not only has substantially no cleaning effect, but also pushes the carpet surface, so The effect may be reduced.

In addition, according to the conventional technique, since the double brushes are maintained in a row and contact the floor, there is a disadvantage that the area occupied on the floor becomes large.

The present invention has been made in view of the above problems, and provides a cleaner head that raises the front brush as needed to optimally maintain the cleaning effect and reduce the area occupied on the floor. The purpose is to do.

Another object of the present invention is to provide a cleaner head capable of cutting off power consumption when the front brush is lifted to reduce power consumption and prevent vibration of the cleaner head.

A vacuum cleaner head according to an embodiment of the present invention for achieving the above object is rotatable in a state in which a front housing and a rear housing having an air outlet arranged side by side in the front-rear direction and an exposed bottom of the front housing are exposed. A front brush installed in the rear housing, a rear brush rotatably installed in a state of being exposed at the bottom of the rear housing, and a front brush and a rear brush which are built in the rear housing and are driven by a power transmission mechanism. Drive motor and an elevating unit that is installed on one side of the rear housing and is configured to allow the elevating hinge of the front housing to move relative to the rear housing, and the front housing expands with respect to the rear housing. When the above state is maintained, the rotational power is transmitted from the drive motor to the front brush, and when the front housing rises, the rotational power of the front brush is interrupted and the rotation is stopped.

It is characterized by having a sensing part installed in either one of the front housing and the rear housing and a sensed part installed in the other.

As an example, one of the sensing unit and the sensed unit is installed inside one frame formed in the front housing, and the other is installed on one side surface of the rear housing, and the front housing is a rear housing. It is characterized in that they are arranged in close proximity to each other and face each other when they are maintained in the deployed state.

Each of the sensing unit and the sensed unit includes a Hall sensor (a magnetic sensor using the Hall effect) and a magnet.

The sensing unit and the sensed unit may include a light receiving sensor and a light source, respectively.

Meanwhile, an intermittent switch may be installed between the front housing and the rear housing.

The elevating unit is rotatably coupled to a housing frame installed on one side of the rear housing, is rotatably coupled to the housing frame, and is coupled to one side of the front housing, and at least a part thereof has a first gear tooth. A drive rotating piece formed, an intermediate gear that is rotatably coupled to the housing frame, and has a second gear tooth that meshes with the first gear tooth, and a lock that extends from the intermediate gear in the rotation axis direction. A support piece, a rotary engagement piece that is rotatably coupled to the housing frame and is intermittently engageable with the engagement support piece, and one end is connected to the drive rotation piece and the other end is And a spring connected to the housing frame.

A locking step is formed on one end of the locking support piece in the circumferential direction, and a hook is formed on one end of the rotation locking piece so as to be locked to the locking step. ..

An operating pedal is installed on the housing frame so that the hinge can move up and down, and the actuating pedal that comes into contact with the rotation locking piece to move the reciprocating hinge is further installed.

One end of the spring is connected to the driving rotary piece through a load acting piece.

The driving rotating piece and the load acting piece are coupled to each other so as to be movable by a hinge.

A hinge portion extending in a direction toward a center of the cleaner head is formed on the housing frame, and the hinge portion is movably coupled to the actuation pedal.

A hinge groove opened upward is formed at an upper end of the hinge portion, and a hinge pin hinged to the hinge groove is formed at a front upper end of the actuating pedal.

A locking groove having an open lower end is formed at one end of the rotary locking piece, and a locking protrusion inserted into the locking groove is formed at a front lower end of the actuating pedal so as to extend laterally. It is characterized by being.

A compression spring is connected between a point spaced downward from the hinge groove of the housing frame and a point spaced downward from the hinge pin of the actuating pedal.

A damping gear that meshes with the intermediate gear is rotatably installed on the housing frame.

On an outer surface of the driving rotary piece, a first coupling part having a concentric axis with the rotation axis of the rear brush and a second coupling part spaced apart from the first coupling part are formed to project. A third coupling portion and a fourth coupling portion that are respectively coupled to the first coupling portion and the second coupling portion are formed at one end of the front housing in the lateral direction, respectively.

According to the present invention, by raising or unfolding (lowering) the front brush as necessary to hit the floor, the cleaning effect is optimally maintained and moved according to the location. There is an advantage that the resistance to time is minimized and the area occupied on the floor during storage can be reduced.

Further, when the front brush rises, the rotational power is cut off, power consumption is reduced, and the entire vibration of the cleaner head due to the rotation of the front brush floating in the air can be prevented.

Further, since the front pedal can be lifted by pushing the actuation pedal with a hand or a foot, there is an advantage that it is easy to use.

Further, since the damping gear that meshes with the intermediate gear is rotatably installed on the housing frame, it is possible to prevent the front housing from being shockedly raised by the spring and damaging the components.

It is a perspective view which shows the structure of the cleaner head which concerns on embodiment of this invention. It is an exploded perspective view showing the structure of the cleaner head concerning the embodiment of the present invention. It is a right side disassembled perspective view which shows the structure of the cleaner head in which the front frame and the side case were isolate|separated. It is a left side exploded perspective view showing the structure of the cleaner head in which the front frame and the side case were separated. It is a front perspective view which shows the structure of the raising/lowering unit shown in FIG. It is a front partial disassembled perspective view which shows the structure of the raising/lowering unit which concerns on embodiment of this invention. It is a rear perspective view which shows the partial structure of the raising/lowering unit which concerns on embodiment of this invention. It is a side view showing the structure of the lifting unit according to the embodiment of the present invention, and is a view showing a state in which the front brush is deployed. It is a side view which shows the structure of the raising/lowering unit which concerns on embodiment of this invention, Comprising: It is a figure which shows the state which the front brush raised.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, a cleaner head 1000 according to an exemplary embodiment of the present invention includes a front housing 100 and a rear housing 200 having an air outlet 210 arranged side by side in the front-rear direction. A front brush 700 rotatably installed in an exposed state on the bottom surface of the housing 100, a rear brush 800 rotatably installed in an exposed state on the bottom surface of the rear housing 200, and a built-in power generator installed in the rear housing. A drive motor 500 that rotationally drives the front brush and the rear brush via a transmission mechanism 600, and an air outlet 210 formed in the rear housing 200. An elevating unit 300 that allows the elevating hinge of the front housing 100 to move relative to the rear housing 200 is installed on one side of the rear housing 200, and the front housing 100 and the rear housing 200 are respectively detected. When the front housing 100 maintains the deployed state (the lowered state) with respect to the rear housing 200 by installing the unit 150 and the sensing unit 250, the rotational power from the drive motors 500 to 700 is transmitted. When the front housing 100 is raised, the rotational power of the front brush 700 is shut off and the rotation is stopped.

Since the front brush 700 and the rear brush 800 are respectively driven by separate drive motors 500, such an operation is possible.

Of course, the sensing part and the sensed part may be installed in the front housing 100 and the rear housing 200, respectively.

That is, when the front brush 700 is raised and is not used, the rotational power can be cut off so that additional power is not consumed.

In particular, the sensed part 150 is installed inside the one frame 190 formed in the front housing 100, and the sensing part 250 is installed on one side of the rear housing 200, so that the front housing 100 is rearward. When the expanded state is maintained with respect to the housing 200, it is preferable that the expanded state is arranged in close proximity to each other so that the rotational power is maintained by a control unit (not shown).

However, when the front housing 100 is maintained in the unfolded state with respect to the rear housing 200, the sensed part 150 and the sensing part 250 are kept away from each other, and the rotation power is maintained by a separate controller. You can also do so.

The sensing unit 250 and the sensed unit 150 may include a Hall sensor and a magnet, respectively, and the sensing unit 250 and the sensed unit 150 may include a light receiving sensor and a light source, respectively.

As an alternative embodiment, an intermittent switch (not shown) may be installed between the front housing 100 and the rear housing 200 so as to be physically (mechanically) connected or disconnected. As a result, the operation of the drive motor 500 connected to the front brush 700 is continued or cut off.

Examples of such an intermittent switch include a limit switch, and various switches that can be intermittently connected through physical contact and separation due to rotation of the front housing 100 can be used.

In addition to these configurations, various components capable of connecting and disconnecting electric power may be employed in the hinge movable member.

On the other hand, since the front housing 100 can be moved up and down with respect to the rear housing 200 via the elevating unit 300, the front brush 700 installed in the front housing 100 can be unfolded to hit the floor, if necessary, or Alternatively, only the rear brush 800 installed in the rear housing 200 may be raised to hit the floor.

For example, when a roll-shaped brush made of a soft carpet material is adopted as the front brush 700 and strong straight bristles or rubber strips or a structure in which straight bristles and a rubber strip are installed together are adopted as the rear brush 800, long bristles are long. When cleaning the carpet, the front brush 700 of carpet material is useless and can be raised to reduce resistance during movement for cleaning.

Specifically, as shown in FIGS. 5 to 7, the elevating unit 300 is rotatably coupled to the housing frame 310 installed on one side of the rear housing 200 and the front housing. One side of 100 is coupled to at least a part of the periphery thereof, and a driving rotary piece 320 having a first gear tooth 321 is formed, and the driving frame is rotatably coupled to the housing frame 310 and meshes with the first gear tooth 321. The intermediate gear 330 having the two gear teeth 331, the locking support piece 340 extending in the rotation axis direction from the intermediate gear 330, and the housing frame 310 are rotatably and reciprocally coupled to the housing frame 310. The locking support piece 340 includes a rotary locking piece 350 that can be intermittently locked, and a spring 370 having one end connected to the drive rotation piece 320 and the other end connected to the housing frame 310.

When the front housing 100 is in a deployed state, that is, when the front brush 700 is in contact with the floor, as shown in FIG. 8, the spring 370 maintains a tensioned state and tends to restore. become.

However, since the rotary locking piece 350 is locked to the locking support piece 340, the spring 370 is not restored.

That is, with the front housing 100 deployed, the spring 370 remains taut.

In particular, the locking support piece 340 has a locking step 341 formed at one end side in the circumferential direction, and the rotary locking piece 350 has a hook 351 formed at one end thereof so as to be locked by the locking step 341. Therefore, it is preferable to form a reliable locking structure.

A peripheral surface of the locking support piece 340 is preferably formed in an arc shape extending from the locking step 341.

As described above, when the front housing 100 is unfolded, that is, when the front brush 700 is in contact with the floor, the sensed portion 150 installed inside the one frame 190 formed in the front housing 100 is The rear housing 200 is disposed on one side of the rear housing 200 so as to closely face and face the sensing unit 250, and rotational power is maintained by a control unit (not shown).

The elevating unit 300 may further include an operation pedal 360 that is installed on the housing frame 310 so as to be movable up and down by a hinge and contacts the rotation locking piece 350 to allow the reciprocating hinge to move.

As a result, as shown in FIG. 9, when the actuation pedal 360 is stepped on, the rotary locking piece 350 contacts the housing frame 310 while rotating with respect to the housing frame 310, and the rotary locking piece 350 is fixed to the housing frame 310. Since the hook 351 is rotated with respect to the locking support piece 340, the hook 351 is separated from the locking step 341 of the locking support piece 340.

Therefore, the restoring force of the spring 370 causes the driving rotary piece 320 to rotate clockwise, and as a result, the front housing 100 coupled to the driving rotary piece 320 also rotates clockwise with respect to the axis concentric with the rear brush 800. It rotates to perform an ascending operation.

In this case, since the sensed part 150 installed inside the one frame 190 formed in the front housing 100 moves away from the sensed part 250 installed on one side of the rear housing 200, the sensed part 250 senses. The part 150 cannot be sensed, so that the rotational power is shut off by the control part (not shown), and the front housing 100 stops rotating.

This prevents the front housing 100 from being unnecessarily rotationally driven, preventing power from being wasted, and preventing the cleaner head 1000 from shaking due to the rotation of the front brush 700 away from the ground. ..

Instead of the actuating pedal 360, other components such as a handle, a lever, or a push switch for hinge-rotating the rotation locking piece 350 may be adopted, and all of these perform similar functions. It will be understood that they are equivalent components in terms of rights interpretation.

One end of the spring 370 is preferably connected to the drive rotation piece 320 via a load acting piece 380.

The load acting piece 380 is installed so as to protrude from the peripheral surface of the drive rotating piece 320 so that the spring 370 guides the maximum moment to the drive rotating piece 320, and the spring 370 is connected to the protruding portion. Is preferred.

In particular, it is preferable that the driving rotary piece 320 and the load acting piece 380 be coupled to each other so that they can be hinge-moved to prevent a failure due to a change in the attitude of the spring 370 due to the rotational movement of the driving rotary piece 320.

In addition, the housing frame 310 is formed with a hinge part 390 extending in a direction toward the left and right center of the cleaner head, and the hinge part 390 may be hinge-coupled to the actuation pedal 360.

As a result, the hinge portion 390 is prevented from protruding to the side surface of the cleaner head, and the appearance is excellent, and it is possible to prevent the area occupied on the floor from increasing.

In this case, a hinge groove 391 opened upward is formed at an upper end of the hinge portion 390, and a hinge pin 361 hingedly connected to the hinge groove 391 is formed at a front upper end of the actuation pedal 360. Therefore, it is preferable that the upper and lower hinges of the operating pedal 360 be smoothly moved.

In addition, a locking groove 352 having an open lower end is formed at one end of the rotary locking piece 350 so that the rotary locking piece 350 can be easily rotated when the hinge of the operation pedal 360 is moved. A locking protrusion 362 that is inserted into the locking groove 352 is preferably formed at the lower front end of the pedal 360 so as to extend laterally.

In addition, as shown in FIGS. 6 and 7, a point P<b>1 spaced downward from the hinge groove 391 of the housing frame 310 and the actuation pedal 360 so as to return to the original position after the actuation pedal 360 is stepped on. It is preferable that a compression spring 318 is connected between the hinge pin 361 and a point P<b>2 that is separated downward.

In this case, since the hook 351 has already been separated from the locking step 341 of the locking support piece 340, the hook 351 is locked by the locking support piece 340 while the actuating pedal 360 receives the force to restore the upper direction. It will keep you in contact with around.

Meanwhile, it is preferable that a damping gear 338 that meshes with the intermediate gear 330 is rotatably installed on the housing frame 310.

The damping gear 338 is a mechanical element that provides an appropriate resistance to rotation, and by engaging with the intermediate gear 330, it is possible to prevent the spring 370 from shockingly raising and damaging components.

In addition, on the outer surface of the driving rotary piece 320, a first coupling part 325 having a concentric axis with the rotation axis of the rear brush 800, and a second coupling part 326 disposed apart from the first coupling part 325. And a third coupling part 105 and a fourth coupling part 106 respectively coupled to the first coupling part 325 and the second coupling part 326 are formed at one end of the front housing 100 in the lateral direction. It is preferable that the rotation of the drive rotating piece 320 ensures that the drive rotating piece 320 rotates in conjunction with each other.

The first coupling portion 325 and the third coupling portion 105, and the second coupling portion 326 and the fourth coupling portion 106 are coupled by a fastening means C such as a screw.

The power transmission mechanism 600 that connects the drive motor 500 to the front brush 700 and the rear brush 800 may include a pulley and a timing belt, or may include a gear train that continuously meshes.

The unreferenced reference numeral 900 in FIGS. 5 and 6 is a side case.

Hereinafter, with reference to FIG. 8 and FIG. 9, the elevating action of the double brush in the cleaner head according to the embodiment of the present invention will be specifically described.

First, as shown in FIG. 8, in a state where the front housing 100 is unfolded, that is, when the front brush 700 hits the floor, the front brush 700 and the rear brush 800 are simultaneously rotated by the drive motor 500 and foreign matter on the floor. Clean while removing.

The removed foreign matter is sucked from the air outlet 210 formed in the rear housing 200 and is housed in a separate dust box (not shown).

In this case, the spring 370 that is connected between the drive rotary piece 320 and the housing frame 310 that configures the elevating unit 300 maintains a tightly pulled state and tends to restore.

However, since the hook 351 of the rotation locking piece 350 is locked to the locking step 341 of the locking support piece 340, the spring 370 is not restored.

That is, the spring 370 remains taut when the front housing 100 is deployed.

As described above, when the front housing 100 is unfolded, that is, when the front brush 700 contacts the floor, the sensed part 150 installed inside the one frame 190 formed in the front housing 100 is The sensor 250 is installed on one side of the rear housing 200 so as to closely face and face the sensor 250, and rotational power is maintained by a controller (not shown).

On the other hand, as shown in FIG. 9, when the operating pedal 360 is stepped on, the locking projection 362 formed on the operating pedal 360 pushes the inner surface of the locking groove 352 formed on the rotary locking piece 350, which causes The hook 351 of the rotary locking piece 350 is disengaged from the locking step 341 of the locking support piece 340 by the hinge movement of the rotary locking piece 350 in the clockwise direction.

Therefore, the restoring force of the spring 370 causes the drive rotating piece 320 to rotate clockwise, and the intermediate gear 330 meshed with the drive rotating piece 320 to rotate counterclockwise.

As a result, the front housing 100 coupled to the driving rotary piece 320 also rotates clockwise with respect to the axis concentric with the rear brush 800, and the upward movement is performed.

As described above, when the front housing 100 is maintained in a raised state, the sensed part 150 installed inside the one frame 190 formed on the front housing 100 is installed on one side of the rear housing 200. Since the sensing unit 250 cannot sense the sensed unit 150, the rotation of the front housing 100 is stopped by the control unit (not shown).

At this time, the damping gear 338 meshing with the intermediate gear 330 rotates together with the intermediate gear 330, so that the front housing 100 slowly rises to prevent a shocking operation.

When the foot is released from the operation pedal 360 to remove the pressing load, the compression spring 318 causes the operation pedal 360 to return to its original position.

Accordingly, when the hook 351 is out of the locked state with the locking step 341, the hook 351 simply maintains the state of pushing the outer peripheral surface of the locking support piece 340. The rotation of the gear 330 is not stopped.

On the other hand, in order to change the posture of the front housing 100 from the raised state (standing state) to the deployed state (lowered state), the front housing 100 is simply rotated in the direction opposite to the raising direction.

Specifically, when the front housing 100 is rotated in the unfolded state, the drive rotating piece 320 coupled to the front housing 100 rotates counterclockwise, and the load acting piece 380 connected to the drive rotating piece 320 is also rotated. As it rotates, it pulls the spring 370 relative to the housing frame 310.

The rotation of the driving rotary piece 320 also rotates the intermediate gear 330 meshing with the driving rotary piece 320 and the locking support piece 340 in a clockwise direction, and as a result, the locking step 341 formed on the locking support piece 340. Is locked to the hook 351 of the rotation locking piece 350.

Accordingly, the front housing 100 connected to the driving rotary piece 320 is maintained in a deployed state, that is, the front brush 700 is in a deployed state by hitting the floor.

The embodiments according to the present invention are merely examples, and it is understood that those skilled in the art can make various modifications and equivalent other embodiments within the scope of the claims. Will

100 front housing
105 Third joint
106 fourth joint
150 Sensitive part
190 Frame on the other hand
200 rear housing
210 air outlet
250 sensor
300 lifting unit
310 housing frame
318 Compression spring
320 drive rotating piece
321 First gear tooth
325 First coupling part
326 Second coupling part
330 Middle gear
331 second gear tooth
338 damping gear
340 Locking support piece
341 locking step
350 Rotation locking piece
351 hook
352 locking groove
360 actuation pedal
361 hinge pin
362 locking protrusion
370 spring
380 load acting piece
390 Hinge part
391 Hinge groove
500 drive motor
600 power transmission mechanism
700 front brush
800 rear brush
900 side case
1000 vacuum cleaner head

Claims (17)

A front housing arranged side by side in the front-rear direction and a rear housing having an air outlet formed therein;
A front brush rotatably installed in an exposed state on the bottom of the front housing;
A rear brush rotatably installed in an exposed state at the bottom of the rear housing,
A drive motor which is built in the rear housing and rotationally drives the front brush and the rear brush via a power transmission mechanism;
An elevating unit that is installed on one side of the rear housing and is configured to allow the elevating hinge of the front housing to move with respect to the rear housing,
When the front housing maintains the expanded state with respect to the rear housing, rotational power is transmitted from the drive motor to the front brush,
A vacuum cleaner head, characterized in that when the front housing rises, the rotational power of the front brush is shut off to stop the rotation. A sensing unit installed in one of the front housing and the rear housing,
The cleaner head according to claim 1, further comprising: a sensed part installed on the other side. One of the sensing unit and the sensed unit is installed inside one frame formed in the front housing,
The other is installed on one side of the rear housing,
The vacuum cleaner head according to claim 2, wherein the front housing is configured to be disposed close to each other and face each other when the front housing is maintained in the deployed state with respect to the rear housing. The cleaner head of claim 2, wherein each of the sensing unit and the sensed unit includes a Hall sensor and a magnet. The cleaner head of claim 2, wherein the sensing unit and the sensed unit each include a light receiving sensor and a light source. The vacuum cleaner head according to claim 1, further comprising an intermittent switch installed between the front housing and the rear housing. The lifting unit is
A housing frame installed on one side of the rear housing,
A drive rotation piece rotatably coupled to the housing frame, one side of the front housing coupled, and a first gear tooth formed on at least a portion of the periphery thereof;
An intermediate gear that is rotatably coupled to the housing frame and has a second gear tooth that meshes with the first gear tooth;
A locking support piece extending from the intermediate gear in the rotation axis direction,
A rotary locking piece that is rotatably coupled to the housing frame and is intermittently locked to the locking support piece;
The cleaner head according to any one of claims 1 to 6, further comprising a spring having one end connected to the driving rotary piece and the other end connected to the housing frame. A locking step is formed on one end of the locking support piece in the circumferential direction, and a hook is formed on one end of the rotation locking piece so as to be locked to the locking step. The vacuum cleaner head according to claim 7. 8. The cleaner head according to claim 7, further comprising an operation pedal installed on the housing frame so as to be movable up and down, and contacting the rotary locking piece to allow the reciprocating hinge to move. .. The cleaner head according to claim 7, wherein one end of the spring is connected to the drive rotating piece through a load acting piece. The cleaner head according to claim 10, wherein the driving rotating piece and the load acting piece are coupled to each other so as to be movable by a hinge. 10. The cleaner head of claim 9, wherein the housing frame is formed with a hinge part extending in a direction toward a center of the cleaner head, and the hinge part is movably coupled to the actuation pedal. .. A hinge groove opened upward is formed at the upper end of the hinge portion,
The vacuum cleaner head of claim 12, wherein a hinge pin that is hinged to the hinge groove is formed at a front upper end of the actuation pedal. A locking groove having an open lower end is formed at one end of the rotation locking piece.
The cleaner head according to claim 12, wherein a locking protrusion, which is inserted into the locking groove, is formed at a front lower end of the actuating pedal so as to extend in a lateral direction. The cleaning spring according to claim 13, wherein a compression spring is connected between a point spaced apart from the hinge groove of the housing frame and a point spaced apart from the hinge pin of the actuating pedal. Machine head. The cleaner head according to claim 7, wherein a damping gear that meshes with the intermediate gear is rotatably installed on the housing frame. On the outer side surface of the drive rotating piece, a first coupling portion having a concentric axis with the rotation axis of the rear brush, and a second coupling portion spaced apart from the first coupling portion are formed to project.
The third coupling part and the fourth coupling part respectively coupled to the first coupling part and the second coupling part are formed at one end of the front housing in the lateral direction, respectively. Vacuum cleaner head.

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