JP7391822B2 - Vacuum cleaner suction body and vacuum cleaner equipped with the same - Google Patents

Description

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

Various suction bodies for vacuum cleaners in which rotating brushes are driven by electric motors have been proposed. For example, Patent Document 1 describes that the distance between the shafts is stabilized by fixing a pulley that holds a rotating brush and an electric motor to a bearing holder.

JP2012-223260A

However, there is a risk that the hair or the like that is sucked in as dust gets wrapped around the rotating brush, and then the hair or the like gets into the rotating part within the bearing holder, making it impossible for the rotating brush to rotate.

The present invention solves the above-mentioned problems, and prevents hair from entering the rotating part of the bearing holder without impairing the stability of the distance between the shafts, and reduces suction failures due to rotation locking. An object of the present invention is to provide a suction body for a vacuum cleaner that can be used in a vacuum cleaner, and a vacuum cleaner equipped with the same.

The present invention provides a rotary cleaning body that cleans a surface to be cleaned, a drive section that drives the rotary cleaning body, a clutch having a circular outer circumferential surface that transmits driving force from the drive section to the rotary cleaning body, and a drive unit. A suction body for a vacuum cleaner, comprising: a mounting cover to which a clutch and a clutch are attached ; a nonwoven fabric disposed in contact with an inner wall of the mounting cover and the clutch; A pair of corner portions are formed opposite to the pair of end portions, a bottom surface of the nonwoven fabric is formed in a curved shape, and a notch portion is formed on an upper surface of the nonwoven fabric opposite to the pair of corner portions of the inner wall of the mounting cover. and are arranged above the clutch, arranged so that the outer peripheral surface of the clutch contacts the curved portion, and arranged so that the upper surface contacts the inner wall of the mounting cover. shall be.

According to the present invention, there is provided a suction body for a vacuum cleaner that can prevent hair from entering the rotating part of a bearing holder without impairing the stability of the distance between the shafts, and a vacuum cleaner equipped with the same. can.

It is a side view showing an example of the vacuum cleaner to which the suction body of this embodiment is applied. It is a perspective view of a mouthpiece. It is a top view of a mouthpiece. It is a front view when a mouthpiece body is seen from the bottom side. (a) Top view of the suction body seen from the side (b) Enlarged cross-sectional view from the side taken along A-A (a) Top view of the suction body viewed from the front (b) Cross-sectional view taken along B-B (c) Enlarged view of the circled area in (b) Exploded diagram of mouthpiece (a) Top view of the unit cover viewed from the side (b) Cross-sectional view taken along C-C (a) Top view of the unit cover seen from the front (b) Cross-sectional view taken along D-D Cross-sectional view of the unit cover taken along X-X Perspective view of nonwoven fabric

Embodiments according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an example of a vacuum cleaner to which the mouthpiece of this embodiment is applied.

As shown in FIG. 1, the vacuum cleaner 1000 can be used in various ways for cleaning, such as a handy state or a stick state.

Further, the vacuum cleaner 1000 is of a cyclone type and includes a vacuum cleaner main body 1, a dust case (dust collector) 2, and a rechargeable battery 3.

The vacuum cleaner main body 1 includes a main body part 10, a motor case part 11, and a handle part 12. The motor case portion 11 accommodates an electric blower (not shown) that generates suction force. The handle portion 12 is provided with an operation switch SW for switching the suction force.

One end of the extension tube 300 is connected to a connection port of the cleaner body 1 so as to communicate with the dust case 2 of the cleaner body 1. Further, the other end of the extension tube 300 is connected to the mouthpiece body 400. Further, the extension tube 300 has a ventilation path (not shown) formed therein, and is provided with wiring (not shown) for electrically connecting the rechargeable battery 3 and a brush motor (not shown) of the mouthpiece 400.

Note that the vacuum cleaner 1000 is not limited to the illustrated stick type vacuum cleaner, but can also be applied to power cord type or cordless type vacuum cleaners such as handheld type vacuum cleaners and canister (cylinder type) vacuum cleaners. can do. Moreover, it is not limited to the cyclone type, but may be a paper pack type or the like.

As shown in FIG. 2, the suction body 400 is of a power brush type in which a brush is rotated by a motor, and includes a suction body 20 and a joint portion 30 rotatably connected to the suction body 20. It is composed of

The mouthpiece body 20 is constructed by combining a mouthpiece lower case 21 and a mouthpiece upper case 22. Both the mouthpiece lower case 21 and the mouthpiece upper case 22 are made of synthetic resin material. For example, the mouthpiece lower case 21 and the mouthpiece upper case 22 are made of ABS resin or the like. Further, the lower case 21 of the mouthpiece body is provided with a bumper portion 24 . This bumper portion 24 is made of elastomer resin, and is constructed by double molding with the mouthpiece lower case 21.

FIG. 3 is a top view of the mouthpiece of the vacuum cleaner. In FIG. 3, there are a suction body upper case 22, a joint part 30 having a ventilation path for air containing dust therein, a contact terminal 301 for supplying power to a drive motor inside the suction body, and a rear part of the suction body upper case.

FIG. 4 is a front view of the mouthpiece viewed from the bottom side. As shown in FIG. 4, the suction body 400 includes a rotating brush (rotating cleaning body) 40, a bearing holder 50 (described later because it is internal), a brush drive switch 303, a brush cover 304 for removing the rotating brush 40, It includes a brush cover 305 on the belt side and large wheels 306. Further, the brush drive switch 303 includes a wheel, which is attached via a spring (not shown) so that the wheel always protrudes from the bottom surface of the mouthpiece body 20. The brush drive switch 303 turns off the rotation of the rotating brush 40 when the wheel is protruding, and turns on the rotation of the rotating brush 40 when the wheel touches the floor or the like and is stored in the mouthpiece body 20. Safety is increased by setting the condition. A large wheel 306 is provided at the rear end of the mouthpiece body 20, and these wheels receive the force of the back-and-forth movement and rotation operation operated by the handle part 12 to bring the bottom surface of the mouthpiece body 20 into close contact with the floor. This improves the operability of the mouthpiece.

The rotating brush 40 is arranged along the left-right direction (width direction) of the mouthpiece body 20 and is rotatably supported within the brush chamber Q. Further, the rotating brush 40 is continuously provided from one end side of the mouthpiece body 20 in the left-right direction (in the axial direction of the rotating brush 40) to the other end side.

Further, the rotating brush 40 includes a plurality of types of brushes such as brushes having different hardnesses, heights, etc., and each brush is arranged in a spiral shape.

The joint part 30 is connected to an extension tube 300 (see FIG. 1) and used in a stick state, or directly connected to the vacuum cleaner main body 1 and used in a handy state.

Further, a brush 120 having a shape along the rotating brush 40 is provided in the lower case 21 of the mouthpiece body behind the rotating brush 40 . Providing such a brush 120 prevents dust scraped in from the front by the rotating brush 40 from flying out to the rear. Further, the brush 120 has a rotation axis (not shown) parallel to the rotating brush 40, and is configured to rotate in the front-rear direction.

FIG. 5(a) shows the mouthpiece main body 20 seen from the side, and FIG. 5(b) shows an enlarged side view of the shape cut along the AA cross section of this figure. As shown in FIG. 5(b), an electric motor 70 as a drive source for driving the rotating brush 40 is arranged. The electric motor 70 is located at one end (left side) in the left-right direction. Further, a control board (not shown) for controlling the rotating brush 40 is disposed in the lower case 21 on the opposite side of the electric motor 70 in the left-right direction. Electric motor 70 is electrically connected to contact terminal 301 shown in FIG.

Figure 6(a) shows the mouthpiece main body 20 seen from the front, Figure 6(b) shows the shape cut along the B-B cross section of this figure, and Figure 6(b) is an enlarged view of the circled part in Figure 6(b). Shown in 6(c).

FIG. 7 shows an exploded view of the mouthpiece body 400. A suction body upper case 22, a unit cover 23, and a nonwoven fabric (felt) 100 that is an elastic member and a circular clutch 71 are provided to fit inside the unit cover 23 from above, and the suction body lower case 21 has these structures. The structure is such that it is supported from below. Although the details will be described later, since the nonwoven fabric 100 is fitted to fill the space between the unit cover 23 and the clutch 71, it prevents hair from entering the rotating part, and prevents hair from getting wrapped around the rotating part. This can prevent rotation locking.

FIG. 8A is a top view of the unit cover 23, showing a state in which the electric motor 70 is attached to the unit cover 23. The unit cover 23 is formed with a motor fixing portion 23a to which the electric motor 70 is fixed. FIG. 7(b) shows the shape of the C-C cross section in FIG. 8(a) viewed from the side. A nonwoven fabric 100 is provided above the clutch 71. Furthermore, the nonwoven fabric 100 is installed at a position overlapping the motor fixing part 23a in the longitudinal axis direction.

FIG. 9A is a top view of the unit cover 23, showing a state in which the electric motor 70 is attached to the unit cover 23. FIG. 9(b) shows the shape of the D-D cross section in FIG. 9(a) viewed from the front.

As shown in FIGS. 7 and 8, in the rear part of the unit cover 23, an electric motor 70 is fixed to a motor fixing part 23a, and in front of the electric motor 70, a clutch 71 is rotatably supported. The clutch 71 is a connection portion to which the rotating brush 40 (see FIG. 4) is connected. Further, the clutch 71 is formed into a cup shape, and a plurality of protrusions 71b that fit with the rotating brush 40 (see FIG. 4) are formed on the inside at intervals in the circumferential direction.

The reason why the electric motor 70 and clutch 71 are attached to the unit cover 23 in this way is that the distance between the shafts can be stabilized. The unit cover 23 is made of a stable hard resin such as glass-filled nylon. What is important about this part is the distance between the shaft of the electric motor 70 and the shaft of the clutch 71 (inter-shaft distance). If this distance is not stable, the distance may become closer or farther due to variations in the parts. The way the belt is tensioned also changes. As a result, the level of noise varies depending on the product, and the rotation becomes unstable. Therefore, in this embodiment, the unit cover 23 made of hard resin is used as means for fixing the electric motor 70 and the clutch 71.

FIG. 10 is a sectional view taken along the line XX in FIG. 9.

As shown in FIG. 10, the rotating shaft 70a of the electric motor 70 is provided with a small diameter pulley (driver pulley) 72 on the electric motor side. The rotating shaft 71a of the clutch 71 is provided with a large-diameter pulley (rotating cleaning element pulley) 73 on the brush side. A toothed belt (drive belt) 74 is stretched between the small diameter pulley 72 and the large diameter pulley 73. Further, the unit cover 23 is provided with a tension pulley 75 for increasing the winding angle of the toothed belt 74.

After the small-diameter pulley 72, large-diameter pulley 73, toothed belt 74, and tension pulley 75 are assembled into the unit cover 23, a brush driving electric motor 70 is attached and assembled into the lower case 21. Further, a clutch 71 (see FIG. 9) is fixed to the large diameter pulley 73.

As a result, when the electric motor 70 is driven, driving force is transmitted from the small diameter pulley 72 to the large diameter pulley 73, and the clutch 71 is rotated. Since the rotating brush 40 and the projection 71b of the clutch 71 are fitted, the rotating brush 40 rotates together, and the rotating brush 40 can be attached to and detached from the clutch 71.

Further, FIG. 10 shows the longitudinal distance L1 and the vertical distance L2 between the rotating shaft 70a of the small diameter pulley 72 and the rotating shaft 71a of the large diameter pulley 73. In this embodiment, the rotating shaft 70a of the electric motor 70 and the rotating shaft 71a of the clutch 71 are integrally held by the unit cover 23. Since it is attached to the lower case 21 in this state, errors in the interaxial distances L1 and L2 between the small diameter pulley 72 and the large diameter pulley 73 and assembly variations can be reduced.

FIG. 11 is a perspective view of a nonwoven fabric 100 that is an elastic member disposed within the unit cover 23. The nonwoven fabric 100 has a bottom surface formed in a curved shape 100a, and a top surface 100d having cut portions 100b and 100c formed on the left and right sides. A clutch 71 is arranged so as to be in contact with a curved portion 100a of the nonwoven fabric 100. Further, the upper surface 100d is arranged so as to be in contact with the inner wall of the unit cover.

Conventionally, there was a space between the inner wall of the unit cover 23 and the clutch 71, so hair or the like could get inside the unit cover 23 along the path shown by arrow Z in FIG. There was a possibility that it would get wrapped around 71c and cause rotation failure. However, in this embodiment, as shown in FIG. 9 and the like, by arranging the nonwoven fabric 100 between the inner wall of the unit cover and the clutch 71, it is possible to prevent hair sucked in from the suction port from entering the unit cover 23. Furthermore, since the bottom surface of the nonwoven fabric 100 is formed into a curved shape 100a, the above problem can be solved without suppressing the rotation of the clutch 71. Furthermore, the nonwoven fabric 100 can be easily placed inside the unit cover 23 due to the cutouts 100b and 100c.

In this embodiment, the nonwoven fabric 100 is arranged between the inner wall of the unit cover 23 and the clutch 71 to suppress hair from getting entangled in the unit cover 23. However, the present invention is not limited to this. The gap between the clutch 71 and the unit cover 23 can be reduced by providing a structure to prevent the intrusion of hair, such as electrostatic flocking, coating/molding or flocking with foamed resin, or providing an uneven shape around the circle of the clutch 71 shaped like the shape. Can prevent hair from clogging and tangling.

1 Vacuum cleaner body 2 Dust case 20 Suction mouth body 21 Suction body lower case (case)
22 Upper case of mouthpiece (case)
23 Unit cover (mounting cover)
23a Motor fixing part 30 Joint part 40 Rotating brush (rotating cleaning body)
70 Electric motor (drive part)
71 Clutch 71a Rotating shaft 71b Projection 71c Rotating shaft groove 72 Small diameter pulley 73 Large diameter pulley 74 Toothed belt 100 Nonwoven fabric (felt)

Claims (2)

a rotating cleaning body that cleans the surface to be cleaned;
a drive unit that drives the rotating cleaning body;
a clutch having a circular outer circumferential surface that transmits driving force from the drive unit to the rotating cleaning body;
A suction body comprising a mounting cover to which the drive unit and the clutch are attached,
comprising a nonwoven fabric arranged so as to be in contact with the inner wall of the mounting cover and the clutch ,
A pair of corner portions are formed on the inner wall of the mounting cover to face the pair of end portions of the nonwoven fabric,
The nonwoven fabric is
a bottom surface is formed in a curved shape, and a notch portion is formed on the top surface facing the pair of corner portions of the inner wall of the mounting cover, and
disposed above the clutch;
A suction body for a vacuum cleaner, characterized in that the outer circumferential surface of the clutch is disposed in contact with the curved portion, and the upper surface is disposed in contact with the inner wall of the mounting cover . A vacuum cleaner comprising the vacuum cleaner suction body according to claim 1 .

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