JPH0595449U - Vacuum cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electric vacuum cleaner that can change the distance between the brush and the floor surface when the brush is stationary and rotating by a simple structure and can prevent friction and damage to the floor surface. . [Structure] A brush 1 and a motor 4 are arranged in a nozzle housing. The shaft of the brush 1 is supported by the support portion 1a, and is elastically supported by the U-shaped bearing portion 2 via the compression coil spring 5. The brush 1 is connected to the motor 4 by a belt 3.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an electric vacuum cleaner, and more particularly to a mechanism for changing a distance of a dust collection nozzle from a brush floor of a power brush.

[0002]

[Prior Art]

 As shown in FIG. 5, for example, a power brush portion of a conventional electric vacuum cleaner has a nozzle housing in which a brush 1 and a motor 4 are arranged, and the brush 1 has shafts projecting from both ends thereof supported by a bearing portion 2. Further, the brush 1 and the motor 4 are connected by a belt 3. In this state, when the motor 4 is driven, the brush 1 rotates via the belt 3 to suck dust while striking the carpet, so that a floor surface such as a carpet with long hair can be cleaned.

[0003]

[Problems to be solved by the device]

 However, since the brush 1 is fixed to the bearing portion 2, the brush 1 is located at substantially the same position as the bottom surface 7 of the nozzle, and the floor surface 8 that does not require rotation of the brush 1 is cleaned. In addition, the brush 1 may come into contact with the floor surface 8 and cause adverse effects such as resistance and scratches.

Further, even when the brush 1 is rotated by the drive motor 4 and used, the brush 1 is hit with a jutan in a fixed state.

Therefore, depending on the length of the bristles of the jutan, the brush 1 may not reach the inside of the bristles of the jutan and the effect as a power brush may not be obtained.

Therefore, an object of the present invention is to provide an electric vacuum cleaner capable of changing the distance between the brush and the floor surface at rest and rotation with a simple structure and preventing friction and damage to the floor surface. To do.

[0007]

[Means for Solving the Problems]

 Therefore, in order to achieve the above object, the present invention comprises a suction motor, a cleaner main body having a dust collecting part, and a dust collecting nozzle connected to the suction system of the cleaner main body. At least the nozzle housing is composed of a motor and a brush that is rotated by the motor, and an elastic material is arranged in the bearing portion of the brush so that the brush is pressed against the floor surface by the force generated when the motor rotates.

[0008]

[Action]

 According to the present invention, the elastic material interposed between the brush and the bearing portion acts to separate the brush from the floor surface when the motor is not operating, and when the motor is driven, the motor and the brush are separated. The connecting belt works to push it toward the floor.

Therefore, by interposing between the brush and the bearing, the position of the brush can be largely changed when the brush is stationary and when the brush is driven, and the effect cannot be obtained depending on the length of the bristles of the jutan. Has been resolved.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIG.

In the figure, one compression coil spring 5 is interposed between the support portion 1 a of the brush 1 and the bottom portion of the bearing portion 2.

According to this structure, when the brush 1 is not rotating, the compression coil spring 5 holds the brush 1 slightly above the floor surface 8 as shown in FIG. When the brush 1 is rotated, a downward force is applied by the belt 3 connecting the drive motor 4 and the brush 1, and the brush 1 is pressed against the floor surface 8 as shown in FIG.

Further, even if the floor surface 8 has some unevenness, the brush 1 can absorb the unevenness.

FIG. 2 shows another embodiment of the present invention, in which a plurality of compression coil springs 5 are interposed between the support portion 1a of the brush and the U-shaped bearing portion 2. FIG. 3 shows a further different embodiment of the present invention, in which a leaf spring 6 is interposed between the support portion 1a of the brush 1 and the bottom portion of the bearing portion 2.

In FIG. 4, a mechanism of generating a force on the power brush 1 by the rotation of the drive motor 4 will be described.

As shown in FIG. 4A, the drive motor 4 rotates in the direction in which dust is drawn.

Here, when the drive motor 4 is rotated, the brush 3 receives the force f in the tangential direction by the belt 3 connecting the drive motor 4 and the brush 1.

Here, as shown in FIG. 2B, the component force of the force f is defined as the horizontal direction fX and the vertical direction fY. Since the lateral force fX acts in the direction in which they cancel each other out, the brush 1 is not affected by the force. The vertical direction fY acts only on the downward force.

As described above, when the drive motor 4 rotates, only the downward force is generated in the brush 1.

[0020]

[Effect of the device]

 As described above, according to the present invention, by interposing the elastic material between the brush 1 and the bearing portion, the distance from the brush and the floor surface can be changed with a large stroke when the brush 1 is stationary and when the brush 1 is driven. effective.

[Brief description of drawings]

1 (a) and 1 (b) are cross-sectional views of essential parts showing a state in which a motor in a dust collecting nozzle unit according to the present invention is not rotating and a state in which the motor is rotating, respectively.

[Fig. 2]

FIG. 3 is a cross-sectional view of an essential part showing a different embodiment of the present invention.

FIG. 4 is a configuration diagram showing a mechanism of generating force to a power brush.

FIG. 5 is a cross-sectional view of a main part showing a conventional example.

[Explanation of symbols]

 1 Brush 1a Support part 2 Bearing part 3 Belt 4 Drive motor 5 Elastic material (compression coil spring) 6 Elastic material (leaf spring)

Claims (1)

[Scope of utility model registration request] 1. A suction motor, a cleaner body having a dust collecting portion, and a dust collecting nozzle connected to a suction system of the cleaner body. The dust collecting nozzle is rotated at least in the nozzle housing by the motor and the motor. An electric vacuum cleaner comprising a brush and an elastic member disposed on a bearing portion of the brush so that the brush is pressed against a floor surface by a force generated when the motor rotates.