JPS6236688B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction port body for a vacuum cleaner that effectively prevents noise generated from the suction port body and an air volume adjusting device with a simple structure.

Generally, cleaning is done by connecting a suction port with a brush to the end of the connecting pipe connected to the dust collection part, but the noise generated from the suction port is caused by the suction airflow over the air path area of the suction port. There are two types of noise: noise caused by turbulence or friction when air flows from a large suction port to a connecting member with a small air path area, and noise generated within the extension pipe connected to the connecting member. . As a result, the cross-sectional area of the suction passage of the suction port body is increased to reduce the wind speed, and the inner surface of the suction passage is made as smooth as possible to prevent turbulence, but this is a passive and effective measure against noise. There are few. In addition, some extension pipes that connect the suction port body and the dust collection section are equipped with a silencer, but since it is far from the suction port body, which is the source of noise, the silencing effect is low. This increases the size of the tube and is not desirable in terms of design. Also, if the suction port body comes into close contact with a mattress, etc., the suction port body will not move, and outside air will not be sucked in, which will put a load on the motor. However, since the outside air is sucked into the narrow leak hole from the wide space, noise is generated, and the noise is generated at hand, which is extremely unpleasant.

This invention lowers the noise level by providing a sound deadening body in a portion of a connecting member connected to the suction mouth body near the suction mouth body, and also prevents noise generation from an air volume adjustment device that adjusts the suction air volume. The purpose of the present invention is to obtain a suction port body for a vacuum cleaner which can be lowered by use.

This invention provides a holder in which a suction passage that opens toward the floor is formed, and attaches to the holder a connecting member that connects the suction passage to a connecting pipe connected to a dust collecting section of a vacuum cleaner. A large-diameter portion having a leak hole is formed in a position close to a connection portion of the connecting member with the holder, and a rotating body having an opening corresponding to the leak hole is rotatably attached to the large-diameter portion. The present invention is characterized in that an air volume adjustment device is formed, and a ventilated annular sound damping member having an inner diameter substantially matching the inner diameter of the connecting member is inserted into the large diameter portion. Therefore, when cleaning, outside air is sucked into the narrow suction passage from a wide space, but the noise can be quickly and effectively absorbed by the sound absorber near the noise source, and the inner diameter of the sound absorber is Since it almost matches the inner diameter of the connection part, there is no turbulence in the airflow in the area where this noise damping element is installed, and no noise is generated.Furthermore, if the holder is in close contact with a mattress, etc., the air volume adjustment device The running performance of the holder is restored by sucking in outside air, but even in this case, the structure is such that noise can be effectively absorbed by the muffler.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. A dust case 2 serving as a dust collecting section of the vacuum cleaner 1 is connected to a flexible hose 3 and an extension pipe 4 serving as connection pipes, respectively. A holder 5 is provided which is detachably connected to the extension tube 4. This holder 5 is assembled by sealing an upper holder 6 and a lower holder 7 with a packing 8 which also functions as a bumper, and when assembled, a suction passage 10 is partitioned by a shielding wall 9 in the center. It is something that is formed. A suction opening 1 communicating with a suction passage 10 is provided in the center of the lower holder 7.
1 is formed, a roller 12 is held at the front edge, and a brush 13 is held at the rear edge. A connecting member 14 is provided at one end of the suction path 10. This connecting member 14 is connected to the extension tube 4 and may be integrally molded with the upper holder 6 or the lower holder 7, but in this embodiment, it is separately molded to function as a rotary tube. The suction passage 1 is formed by molding a member and can be freely rotated.
It is inserted into 0. That is, this connecting member 14 is a pipe-shaped member that slopes rearward and upwardly from a horizontal portion 15 through a bent portion 16, and is secured at its front end by a groove 17 formed on the inner surface of the suction passage 10. A protrusion 18 that is rotatably held is formed. Thus, a large-diameter portion 19 is formed on the outer periphery of the horizontal portion 15 of the connecting member 14, and an air volume adjustment device 20 is provided on the outer periphery of this large-diameter portion 19. This air volume adjustment device 20 has a large diameter portion 1
It consists of a ring 24 as a rotating body which has a leak hole 21 formed at 9 and an opening 22 corresponding to the leak hole 21 and is rotatably fitted into the annular stepped portion 23 of the large diameter portion 19. Then, the large diameter portion 19
A cylindrical sound deadening body 25 made of a foamed material or the like that has air permeability and flexibility is inserted into the housing.
Further, the inner surface of this muffler 25 is provided with the muffler 25
A cover 26 made of breathable polyester or paper material is fitted to protect the cover from dust.

In such a configuration, the holder 5 is moved along the floor while cleaning, but noise caused by outside air being sucked into the narrow suction passage 10 from a wide space is absorbed by the muffler 25. This muffler 25
Since it is provided in the holder 5 near the noise source, the noise is quickly absorbed before it is transmitted to other parts. In addition, the suction passage 14 is bent and generates noise due to the fact that the outside air sucked in from the floor flows toward the extension pipe 4, but the noise can be effectively reduced by providing the silencer 25 on the connection member 14. can be reduced. Moreover, the sound muffling body 25 has a large diameter portion 19.
Because it is housed in the air, it is also possible to prevent noise and wind noise caused by turbulence. Furthermore, if the suction opening 11 is in close contact with the mattress or the like, it becomes difficult for outside air to be sucked in, resulting in poor running performance and a load on the motor, but this can be resolved by opening the leak hole 21 by turning the ring 24. At this time, outside air is sucked into the narrow leak hole 21 from a wide space, but the noise can still be reduced by the muffler 25.

Next, a second embodiment of the present invention will be explained based on FIG. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. The air volume adjusting device 27 of this embodiment has a plurality of leak holes 28 formed at one end of the large diameter portion 19 of the connecting member 14, and these leak holes 28.
A cover 32 as a rotating body is formed with a corresponding opening 29 on one end surface and a locking portion 31 on the other end that is rotatably held while being prevented from slipping out by the groove 30 of the large diameter portion 19. It was established. This cover 32 has a semicircular shape slightly over 180 degrees, and can fit around the outer periphery of the connecting member 14 by expanding elastically outward. Therefore, by rotating the cover 32, the opening amount of the leak hole 28 can be adjusted.

Since the present invention is constructed as described above, a large diameter portion is formed in a position close to the connection portion of the connecting member with the holder, and a sound damping member is provided inside this large diameter portion, so that noise is likely to be generated. By preventing the generation of noise from the connecting member and the noise generated within the extension pipe by using the muffling member of the connecting member, it is possible to reduce the leakage of noise from the suction port, thereby providing a muffler on the extension pipe, etc. This eliminates the need for extension tubes, etc., making the design more streamlined and improving gripping operability.Moreover, since the inner diameter of the muffler is approximately the same as the inner diameter of the connecting member, this muffler There is no turbulence in the airflow in the area where the airflow is provided, and no noise is generated.Furthermore, since the sound deadening body is used for both the sound deadening of the connection member and the sound deadening of the air volume adjustment device, it is possible to adjust the air volume in another part. The structure is simpler than installing a separate device, and when the holder is in close contact with a futon, etc., the air volume adjustment device is operated to draw in outside air, but even in this case, the noise reduction material is used to reduce noise. It has the following effects:

[Brief explanation of the drawing]

Fig. 1 is a reduced side view showing a first embodiment of the invention, Fig. 2 is a perspective view of the holder, Fig. 3 is an enlarged longitudinal sectional side view of the holder, and Fig. 4 is a connection part thereof. FIG. 5 is a partially cutaway perspective view of a connecting portion showing a second embodiment of the present invention. 2...Dust case (dust collection part), 3...Flexible hose (connection pipe), 4...Extension pipe (connection pipe), 5...
Holder, 10... Suction path, 14... Connection member, 1
9... Large diameter section, 20... Air volume adjustment device, 21...
Leak hole, 22... Opening, 24... Ring (rotating body), 25... Sound deadening body, 27... Air volume adjustment device, 28... Leak hole, 29... Opening, 32...
...Cover (rotating body).

Claims (1)

[Claims] 1. A holder in which a suction passage that opens toward the floor is formed is provided, a connection member that connects a connection pipe connected to a dust collection part of a vacuum cleaner and the suction passage is attached to the holder, and the connection member A large-diameter portion having a leak hole is formed in a position close to the connecting portion with the holder, and a rotating body having an opening corresponding to the leak hole is rotatably attached to the large-diameter portion. A suction port body for a vacuum cleaner, characterized in that a ventilated annular sound muffling body having an inner diameter substantially matching the inner diameter of the connecting member is inserted into the large diameter portion.