JP6856485B2 - Vacuum cleaner mouthpiece - Google Patents

Description

The present invention relates to a mouthpiece of a vacuum cleaner.

Among conventional electric cleaners, in the mouthpiece in which the rotary cleaner is driven by an electric motor, a floor surface detection wheel support portion rotatably supported in the vertical direction and a floor surface detection wheel support portion are provided below the mouthpiece. A floor surface detection wheel supported by the floor surface detection wheel is provided, a safety switch is provided to rotate and stop the rotary cleaning body by rotating the floor surface detection wheel support portion, and the floor surface detection wheel support portion rotates when the mouthpiece is lifted. There is one that automatically stops the rotation of the rotary cleaning body. (See, for example, Patent Document 1)

Japanese Patent No. 4617558

However, in the mouthpiece described in Patent Document 1, when the mouthpiece comes into contact with the cleaning surface, the floor surface detection wheel is pushed toward the mouthpiece side, and the floor surface detection wheel support portion rotates accordingly, so that the rotary cleaning body rotates. It is a structure to do. Therefore, on a cleaning surface with large irregularities, the floor surface detection wheel does not come into contact with the cleaning surface and is not pushed toward the mouthpiece side, so that the rotary cleaning body stops, dust cannot be scraped up, and the cleaning ability is reduced. May be done. In addition, when using on a soft cleaning surface such as a futon, the floor surface detection wheel is buried on the cleaning surface side and cannot be pushed into the mouthpiece side, so the rotary cleaning body stops and dust cannot be scraped up. , Cleaning ability may decrease.

An object of the present invention is to prevent the rotary cleaning body from unintentionally stopping due to the unevenness and hardness of the cleaning surface and reducing the cleaning ability, and to provide a mouthpiece of an electric vacuum cleaner having a high cleaning ability and being easy to use. The purpose is to provide a vacuum cleaner equipped with this.

A mouthpiece having an opening facing the surface to be cleaned, a rotary cleaner inside the mouthpiece, an electric motor for driving the rotary cleaner, and a state of contact and non-contact of the mouthpiece with the surface to be cleaned are detected. It is provided with a detection unit and a safety switch that automatically stops the rotation of the rotary cleaning body when it detects that the detection unit is in a non-contact state with the surface to be cleaned, and the mouthpiece has a cover and a cover covering the upper part. It is composed of a case in contact with the cleaning surface, the case is pivotally supported by the cover by a rotation shaft, and the case faces the surface to be cleaned together with the detection portion except at least the opening, and the case of the case. The safety switch is turned on and off by rotation.

According to the present invention, it is possible to prevent the rotary cleaner from unintentionally stopping due to the unevenness and hardness of the cleaning surface, making it impossible to scrape up dust, and reducing the cleaning ability, resulting in high cleaning ability and usability. A good vacuum cleaner mouthpiece and a vacuum cleaner with it can be provided.

It is an external perspective view which shows the whole of the electric vacuum cleaner which concerns on this invention. It is an external perspective view which shows the state which omitted the extension pipe in the vacuum cleaner which concerns on this invention. It is a top view of the mouthpiece body which concerns on this invention. It is a bottom view of the mouthpiece body which concerns on this invention. It is a top perspective view of the state which the upper part of the mouthpiece which concerns on this invention is removed. FIG. 3 is a cross-sectional view taken along the line AA of the mouthpiece shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA when the mouthpiece shown in FIG. 3 is in contact with the surface to be cleaned.

Hereinafter, examples according to the present invention will be described with reference to the drawings.

FIG. 1 shows an external view of the vacuum cleaner of the present invention. The vacuum cleaner 1 is composed of a vacuum cleaner main body 2, an operation pipe 4 connected to a hose portion 3 and provided with a hand operation switch, an extension pipe 5 provided so as to be expandable, and a mouthpiece 6. There is.

The vacuum cleaner main body 2 includes an electric blower 2a that generates a suction force, a dust collector 2b that collects dust collected by the suction force of the electric blower 2a, and the like. In this embodiment, a so-called cyclone type vacuum cleaner will be described as an example, but it may be applied to a so-called paper pack type vacuum cleaner.

One end of the hose portion 3 is connected to the connection port 2c of the vacuum cleaner main body 2 so as to communicate with the dust collecting portion 2b of the vacuum cleaner main body 2. The other end of the hose portion 3 is connected to one end of the operation pipe 4.

The operation tube 4 includes a handle 4a provided with a hand operation switch and the like, a power supply terminal (not shown) for supplying power from the vacuum cleaner main body 2. An energizing terminal (not shown) provided at one end of the extension pipe 5 is connected to the power feeding terminal.

By operating the hand operation switch of the operation pipe 4, it is possible to operate and stop the electric blower 2a, switch between strong, medium and weak, and operate and stop the electric motor 10 (see FIG. 4) provided in the mouthpiece 6. There is.

The extension pipe 5 includes an outer pipe 5a and an inner pipe 5b, and one end of the inner pipe 5b is inserted into the other end of the outer pipe 5a to be provided inside the outer pipe 5a and the inner pipe 5b (not shown). The ventilation passages are connected so as to communicate with each other, and are configured to be expandable and contractible. Note that FIG. 1 illustrates the shortest state of the extension pipe 5.

Further, FIG. 2 shows a state in which the extension pipe 5 shown in FIG. 1 is omitted. In the present embodiment, when the mouthpiece 6 of the present invention is used, the presence of the mouthpiece 6 near the hand makes it easy to operate, for example, when cleaning a sofa or a futon.

FIG. 3 is a top view of the mouthpiece 6.
As shown in FIG. 3, the mouthpiece 6 includes a mouthpiece case 7 and a mouthpiece joint 8 connected to the mouthpiece case 7 in a top view.
The mouthpiece case 7 is formed elongated in the left-right direction (width direction) when viewed from above.
The mouthpiece joint 8 includes a connecting portion 9 that is rotatably connected to the mouthpiece case 7.

The connecting portion 9 has a axial direction in the left-right direction of the mouthpiece case 7, exhibits a substantially cylindrical portion 9a in the side sectional view of FIG. 5, and is connected to the mouthpiece case 7. Further, the connecting portion 9 is configured so that the mouthpiece joint 8 can rotate from a state substantially parallel to a state to be substantially perpendicular to the surface to be cleaned (cleaning surface) M (see FIG. 7) (in the vertical direction). Has been done. That is, by rotating the connecting portion 9 with respect to the mouthpiece case 7 with the substantially cylindrical portion 9a as a fulcrum, the extension pipe 5 (see FIG. 1) or the operation pipe 4 (see FIG. 2) is moved to the surface to be cleaned M (see FIG. 2). It can be rotated between a state substantially parallel to (see 7) and a state substantially perpendicular to it.

Further, the mouthpiece joint 8 is provided with a power supply terminal 8a for supplying power. In the vacuum cleaner 1 (see FIG. 1) of the present embodiment, the electric power supplied to the mouthpiece 6 is configured to be supplied from the vacuum cleaner main body 2 through the hose portion 3, the operation pipe 4, and the extension pipe 5. There is.

FIG. 4 is a bottom view of the mouthpiece 6.
As shown in FIG. 4, the mouthpiece 6 is provided with a rotary cleaning body 13. The mouthpiece case 7 is formed with a brush chamber Q having an opening on the lower surface (the surface facing the cleaning surface).

The rotary cleaning body 13 is arranged on the front side in the front-rear direction along the left-right direction of the mouthpiece case 7, and is rotatably supported in the brush chamber Q. Further, the rotary cleaning body 13 is continuously provided from one end side to the other end side in the left-right direction (axial direction of the rotary cleaning body 13) of the mouthpiece case 7.

Further, the rotary cleaning body 13 includes a plurality of types of brushes 13a and 13b, such as brushes having different hardness, and the brushes 13a and 13b are arranged in a spiral shape. In the present embodiment, the case where two types of brushes 13a and 13b are arranged has been described as an example, but the present invention is not limited to this, and three or more types may be arranged in a spiral shape. A configuration may be added in which a blade member made of an elastic material such as rubber is spirally arranged between the brushes, which can be appropriately changed.

The bearing holding member 14 supports one end of the rotating shaft of the rotary cleaning body 13, and is fixed to the mouthpiece case 7 with screws.

The bearing holding member 15 supports the other end of the rotating shaft of the rotary cleaning body 13, and is fixed to the mouthpiece case 7 by using a lock mechanism (not shown) so as to be removable.
A lower surface case 16 that covers the entire lower surface of the mouthpiece except for the opening of the brush chamber Q is attached to the lower surface of the mouthpiece.

FIG. 5 is a top perspective view of the mouthpiece 6 with the upper portion of the mouthpiece case 7 removed. As shown in FIG. 5, the mouthpiece 6 is provided with an electric motor 10 for driving the rotary cleaning body 13 and a circuit board 12 for controlling the electric motor 10 behind the rotary cleaning body 13 (see FIG. 4).

The electric motor 10 is attached to one end side of the mouthpiece case 7 in the left-right direction. Further, the output shaft of the electric motor 10 is arranged parallel to the left-right direction of the mouthpiece case 7. Further, the output shaft of the electric motor 10 extends toward one end side in the left-right direction, and is connected to the rotary cleaning body 13 via the toothed belt 11 at one end portion (the left end portion in the drawing) in the mouthpiece case 7. There is.

The circuit board 12 is attached to the side opposite to the electric motor 10 in the left-right direction of the mouthpiece case 7. Further, the circuit board 12 is arranged in the mouthpiece case 7 with the mounting surface facing upward in the vertical direction. The mounting surface is not necessarily limited to upward in the vertical direction, and may be inclined with respect to the horizontal direction.

FIG. 6 is a cross-sectional view taken along the line AA in FIG. In FIG. 6, the lower surface case 16 is rotatably attached to the mouthpiece case 7 by a rotating shaft 17, and is urged downward by a spring 18. The rotating shaft 17 is provided in front of the rotary cleaning body 13, and is preferably provided at the front end as shown in FIG. This is to make it easier for the lower surface case 16 to follow the surface to be cleaned M when cleaning the uneven surface to be cleaned (see FIG. 7). When the rotating shaft 17 is provided at the front end as in this embodiment, the distance of rotation (vertical movement) is maximized, and smooth cleaning is possible even on the surface M to be cleaned having large irregularities. The rotation of the lower surface case 16 is locked by the locking portion 21, and the locking portion 21 prevents the lower surface case 16 from falling off. Further, the mouthpiece case 7 is provided with a safety switch 20, and a safety switch operation unit 19 is provided adjacent to the safety switch 20. FIG. 6 shows a state in which the lower surface case 16 moves to the maximum downward (a state in which the lower surface case 16 is stopped at the locking portion 21), and the energization is cut off by the safety switch 20. Therefore, in FIG. 6, the rotation of the rotary cleaning body 13 is stopped.
FIG. 7 shows a cross-sectional view taken along the line AA in a state where the mouthpiece 6 is in contact with the surface M to be cleaned.
When the mouthpiece 6 comes into contact with the surface to be cleaned M, the lower surface case 16 rotates upward, the safety switch operating unit 19 operates the safety switch 20 to energize the electric motor 10, and the rotary cleaning body 13 rotates. Start spinning. Even if the mouthpiece 6 is moved to the front of FIG. 7 in this state and approaches the recess L of the surface M to be cleaned, the front-rear width of the recess is larger than the front-rear width of the mouthpiece case 7, and the mouthpiece 6 is completely cleaned. Since at least a part of the lower surface case 16 continues to be in contact with the surface to be cleaned unless it is separated from the surface, the rotary cleaning body 13 can continue to rotate and maintain a high cleaning ability.
In this embodiment, the lower surface case 16 has a shape having an opening only in the opening of the brush chamber Q, but may have another opening or may have a grid shape.
Further, although the rotating shaft 17 of the lower surface case 16 is provided in the front in this embodiment, the same effect can be obtained even if the rotating shaft 17 is provided in the rear (rearward from the rotary cleaning body 13) with the front-rear relationship reversed.

1 Vacuum cleaner 2 Vacuum cleaner body 2a Electric blower 2b Dust collector 6 Suction unit 7 Suction port case 10 Electric motor 11 Suction port body 12 Circuit board 13 Rotating cleaner 16 Bottom case 17 Rotating shaft 18 Spring 19 Safety switch operation unit 20 Safety switch 21 Locking part L Recessed surface (floor surface) to be cleaned M Cleaned surface (floor surface)
Q Brush room

Claims (2)

A mouthpiece having an opening facing the surface to be cleaned, a rotary cleaning body inside the mouthpiece, an electric motor for driving the rotary cleaning body, and a state in which the mouthpiece is in contact with or not in contact with the surface to be cleaned. In the electric motor provided with a detection unit for detecting the above and a safety switch for automatically stopping the rotation of the rotary cleaner when the detection unit is detected to be in a non-contact state with the surface to be cleaned. The mouthpiece is composed of a cover that covers the upper part and a case that is in contact with the surface to be cleaned. The case is pivotally supported by the cover by a rotation shaft, and the case is integrated with the detection part and is covered except at least the opening. A mouthpiece of an electric motor, which faces the cleaning surface and has an on / off operation of the safety switch by rotating the case. The mouthpiece of an electric vacuum cleaner according to claim 1, wherein the rotating shaft is provided in front of the rotary cleaning body.

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