JPH05176870A - Suction port body for vacuum cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electric vacuum cleaner that reduces noise generated from the suction port body and simplifies the structure of the suction port body to reduce the size thereof and has good operability. [Structure] Both ends of a rotating brush 7 are supported by bearings 9, and a turbine 10 is attached between the end of the rotating brush 7 and a bearing 9.
A partition wall 11 is provided between the end of the rotating brush 7 and the turbine 10 to form a turbine chamber 12, an intake port 13 is opened facing the turbine 10, and a guide passage 1 is provided behind the rotating brush 7.
Configured 4. [Effect] The number of parts of the mouthpiece main body is small, and the structure is extremely simple, the work process at the time of assembly is simplified, and the cost is greatly reduced. Further, the mouthpiece main body is made smaller and lighter, so that it is easy to handle and the operability during cleaning is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner.

[0002]

2. Description of the Related Art A conventional suction port of an electric vacuum cleaner is disclosed in
As described in No. 61-7806 or No. 61-7807, in order to effectively absorb the dust adhering to the carpet as a suction port for effectively cleaning both the hard floor surface and the carpet. Some include a rotating brush and a turbine that drives the rotating brush. The suction port body forms a suction air passage connected to the dust collecting part of the electric vacuum cleaner in the main body running on the floor surface and a brush chamber opening toward the floor surface by a partition wall, and the turbine is installed in the suction air passage. And a rotary brush that is driven by a turbine via a drive member in the brush chamber.

[0003]

In the above prior art, a horizontally long brush chamber opening toward the floor and a turbine chamber having a turbine at the rear are provided, and the suction air passage and the transmission chamber communicating with the extension pipe are provided. The rotary brushes are supported by bearings and rotatably accommodated therein, and the rotary brushes and the turbine are connected by a belt in the transmission chamber. For this reason, the suction mouth itself becomes large, and operability or handling is inconvenient. In addition, when performing maintenance such as removing dust, thread dust, and hair around the rotating brush, it is difficult to handle because the belt interferes with the removal of the rotating brush.

Further, since the turbine chamber is a suction passage for dust or the like, hair or lint is entangled with the turbine, or cotton dust is accumulated between the blades of the turbine to hinder the rotation of the turbine to lower the suction performance. I was letting it.

On the other hand, in the rotary brush, the rotation of the turbine is decelerated and transmitted by a power transmission belt stretched between a small pulley provided on the shaft end of the turbine and a large pulley provided on the rotary brush. There is. Therefore, since the turbine is rotating at several times the rotating speed of the rotating brush, the speed of the flow that flows into the turbine fluctuates and interferes with the turbine. Is likely to occur. In particular, when the suction port body is separated from the cleaning surface, the rotating brush becomes unloaded and the amount of air suction increases, so that the number of revolutions of the turbine and the rotating brush increases, so that the noise becomes louder and the ear becomes uncomfortable. There was a problem of giving pleasure. In addition, when cleaning a carpet with long fluff, the rotating brush acts as a resistance to reduce the rotating force of the rotating brush, or if only a large amount of dust is sucked and it becomes impossible to rotate, only the turbine is rotating. In addition, the pulleys and belts were causing teeth to fly, causing noise.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric vacuum cleaner which reduces noise generated from the suction port body and simplifies the structure of the suction port body to reduce the size thereof and has good operability.

[0007]

To achieve the above object, the present invention relates to a suction port body provided with a rotatable rotary brush body provided in a suction port body and a turbine for driving the rotary brush body. Supporting both ends of the rotating brush with bearings, installing a turbine between the end of the rotating brush body and the bearing, and providing a partition between the end of the rotating brush and the turbine to form a turbine chamber. The air inlet is opened so as to oppose to the above, and the guide flow path is configured so that the suction port at the rear of the rotary brush and the ventilation passage at the rear of the turbine meet at the suction passage connected to the main body.

[0008]

According to the above construction, when performing maintenance such as removing hair or thread waste wrapped around the rotary brush,
When the brush cover is opened, the rotating brush and the turbine can be removed together, so handling is easy.

When the suction port body is in close contact with a carpet having long hair, the gap between the suction port body and the floor surface disappears, and the suction air flow tends to be insufficient. Can be prevented, and the rotation of the rotating brush can be continued to effectively absorb dust and lint attached to the carpet. Further, since the intake port of the turbine is not in contact with the floor surface, it is possible to prevent the inability to rotate due to dust and lint adhering to the bearing portion of the rotating brush. Furthermore, since there is no intrusion of hair or cotton dust, which is a factor that hinders the rotational force of the turbine, the suction performance can be maintained.

Since the partition plate forming the guide flow path behind the turbine has a hole and the sound absorbing material is housed outside the hole, the blade noise and the vortex noise generated from the turbine are absorbed to reduce the noise. be able to.

Since the turbine is provided at both ends of the rotary brush and integrated, the rotational speed of the turbine may be low, so that the speed fluctuation of the suction airflow is small and the blade rotation noise of the turbine is less likely to occur. Further, since a belt and a pulley for power transmission are not required, tooth skipping and belt striking noise caused by timing deviation are eliminated.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the mouthpiece main body 1, showing a state in which an upper case is partially removed. Here, the lower case 2 has a shock absorbing bumper 3 on the front and side thereof, and wheels 5 for movement. There is a curved joint 4 at the rear for carrying dust from the suction port 6 on the suction air flow and sending it to the cleaner body (not shown). A rotary brush 7 is arranged at the suction port 6, both ends are rotatably supported by bearings 9, and a turbine 10 is provided inside the bearing 9 and is connected to the rotary brush 7. On the outer periphery of the rotary brush 7, there are a base 16 having a fitting groove continuous in the longitudinal direction on a spiral line, and a soft flexible blade 14 fitted in the fitting groove. Also, the rotating brush 7
A partition 11 is provided between the turbine 10 and the turbine 10, and a turbine chamber 12 is formed. The lower case 2 has a guide passage 1 for bending the air passing through the turbine 10 and guiding it to the joint 4.
4 are arranged. A removable brush cover 15 that covers the rotating brush 7 and the turbine 10 has an intake port 13 that is open to face the turbine 10, and includes a switching lever 8 that is attached to and detached from the suction port body 1. Although not shown, the intake port 13 has the same effect even if it is located on the front surface of the lower case 2.

With this structure, when the electric vacuum cleaner is operated to perform cleaning, air flows from the intake port 13 to the turbine 10, the guide passage 14, and the curved joint 4 to rotate the turbine 10. The rotating brush 7 rotates in synchronism with this rotating force, the surface to be cleaned is scraped up by the blade 14 of the rotating brush 7, and smoothly bends according to the suction airflow from the suction port behind the rotating brush 7. It passes through 4 and is sucked into the cleaner body.

Here, when the suction port main body 1 is in close contact with a carpet having a long bristle, there is no gap between the floor surface and the suction air flow, and the intake air flow tends to be insufficient. The reduction of the rotational force of the turbine 10 can be prevented, and the rotation of the rotary brush 7 can be continued to effectively absorb dust and lint attached to the carpet. In addition, turbine 1
Since the intake port 0 of 0 is not in contact with the floor surface, it is possible to prevent non-rotation due to dust and lint attached to the bearing portion 9 of the rotating brush 7. Moreover, the turbine room 1
2 can reduce the gap between the outer circumference of the turbine 10 and the efficiency of the turbine 10, and thus can reduce the amount of intake air and make it compact. Furthermore, turbine 1
Since there is no intrusion of hair or cotton dust, which is a factor that impedes the rotational force of 0, the suction performance can be maintained.

On the other hand, when cleaning the floor, the rotating brush 7 does not need to rotate. Even if the suction port main body 1 is in close contact with the floor surface, a gap for inflowing air is secured, so that a sufficient suction airflow is given to the suction port 6. Therefore, the suction airflow from the intake port 13 of the turbine 10 does not rotate the turbine 7 because of its low speed. Therefore, there is no need to switch the rotation of the turbine 7 depending on the cleaning surface, and the inconvenience during cleaning is eliminated.

Next, in order to remove hair, thread waste, etc. entangled in the rotary brush 7, as shown in FIG. 2, the switching lever 8 of the brush cover 15 is operated to open the brush cover 15 to make it integral. The rotating brush 7 and the turbine 10 which are present can be removed for cleaning. Thus, like the conventional suction body shown in FIG.
Unlike the case where the turbine 19 and the turbine 19 are connected by the belt 22, it does not take time to remove the rotating brush 18. Further, since the turbine chamber 20 behind the rotary brush chamber is eliminated, the suction port main body can be downsized.

The turbine 10 integrated with the rotating brush 7 rotates at a speed of about 3,000 rpm to about 5,000 rpm, and the rotational force of the turbine is reduced by a belt and transmitted to the rotating brush. Compared to the case where the turbine is rotating, the rotational speed of the turbine is significantly reduced, so it is less likely that the speed of the flow that flows into the turbine will fluctuate.
It is possible to reduce the blade rotation sound based on the rotation speed. Even if the rotation noise of the blade is generated, it is in the low frequency band in terms of frequency, so that it is hard for the human ears to hear, and the discomfort during cleaning is eliminated. Further, the belt 22 for power transmission
Since the pulley 21 and the pulley 21 are not necessary, tooth skipping and belt striking noise caused by timing deviation are eliminated, and the noise of the mouthpiece main body is reduced.

FIG. 3 shows another embodiment in which the partition plates 14a and 14b forming the guide passage 14 of the lower case 2 have a plurality of holes around which a sound absorbing material 17 is housed. ..
Since the sound absorbing material 17 absorbs the airflow flowing from the intake port 13 of the turbine 10 and the blade rotation sound and vortex sound generated by the turbine, noise can be reduced.

According to this embodiment, the mouthpiece main body has a small number of parts, and the structure is very simple, the working process at the time of assembling is simplified, and the effect of cost reduction is great. Further, the mouthpiece main body is made smaller and lighter, which facilitates handling and improves operability during cleaning.

[0020]

According to the present invention, the following effects can be obtained.

(1) Since the rotating brush and the turbine are integrated with each other, a belt and a pulley for power transmission are not required, which facilitates maintenance of the rotating brush, reduces the number of parts, and reduces the suction port itself. This leads to downsizing and weight reduction, and has a great effect on cost reduction, including simplification of the work process during assembly. In addition, the weight reduction improves the operability during cleaning.

(2) Since the turbine rotates at a low speed, the fluctuation in speed with the suction airflow is reduced, interference with the turbine is less likely to occur, and blade rotation noise can be reduced.

(3) By separating the suction port at the rear of the brush from the suction port of the turbine, even if the suction port body is in close contact with a carpet with long hair, the turbine can continue to rotate and adhere to the carpet. Dust and lint can be sucked in efficiently.

(4) Since the partition plate forming the guide flow passage at the rear of the turbine has a plurality of holes and the sound absorbing material is housed outside the partition plate, noise from the suction port can be reduced. As a result, noise reduction is achieved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view in which a part of an upper case is cut away, showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a rotary brush in FIG. 1 is removed.

FIG. 3 is a partially cutaway sectional view showing another embodiment.

FIG. 4 is a front view showing a conventional mouthpiece.

[Explanation of symbols]

1 ... Suction body, 4 ... Curved joint, 7 ... Rotating brush, 1
0 ... Turbine, 12 ... Turbine chamber, 13 ... Intake port, 14
... Guiding channel, 17 ... Sound absorbing material.

Claims (1)

[Claims] 1. A suction port body comprising a rotatable rotary brush body provided in a suction port body and a turbine for driving the rotary brush body, wherein both ends of the rotary brush are supported by bearings. A turbine is provided inside the bearing, a partition is provided between the rotary brush and the turbine to form a turbine chamber, and an intake port is opened in the turbine chamber so as to face the turbine, and the rotary brush is provided. A suction passage body of an electric vacuum cleaner, wherein a guide passage is configured so that a suction passage at the rear of the turbine and a ventilation passage at the rear of the turbine meet at a suction passage connected to the main body.