JPS6236689B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention effectively performs noise reduction by preventing the sound muffling body attached to the connecting pipe provided in the suction port body from moving from a predetermined position without damaging the muffling body. The present invention relates to a suction port body for a vacuum cleaner.

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. turbulence in the air flow when it flows from a large suction port to a connecting member with a small air path area,
Alternatively, there are two types of noise: noise generated by friction and noise generated within the extension pipe connected to the connecting member. 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 these measures are passive and have little effect as noise countermeasures. 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.

In addition, in the case where the connection member of the suction port body is bent and rotated in the vertical direction with respect to the floor surface, the bending and rotation part must be provided in a position close to the connection part between the suction port body and the connection member, but in this case, However, when a sound deadening body is provided at the connecting portion, there is a problem that the sound deadening body may be damaged or moved due to repeated bending.

This invention enables the sound absorbing body to be installed at the part of the connecting member connected to the suction port body near the suction port body without damaging it.
Another object of the present invention is to obtain a suction port body for a vacuum cleaner that is installed so as not to move from a predetermined position and reduce the noise level.

The present invention provides a holder in which a suction passage is formed that opens toward the surface to be cleaned, and a connecting pipe that connects the suction passage of the holder to an extension pipe connected to a dust collecting section of a vacuum cleaner. A plurality of divided pipes divided in a direction perpendicular to the axial direction of the connecting pipe are provided at a position close to the connection part of the connecting pipe with the holder, and each connecting end of these divided pipes is provided at least with respect to the cleaning surface. a pair of fitting portions each having a curved cross section are formed so as to be rotatably fitted to each other in orthogonal directions so as to be prevented from coming off, and the curved portion of the fitting portion on the inside substantially matches the inner diameter of the connecting pipe. It is characterized by the fact that it is equipped with a sound deadening body with an inner diameter of Therefore, outside air is drawn from a wide space into a suction passage that suddenly narrows, and the flow passage from the suction passage to the connecting pipe is bent because it is connected to the extension pipe, which tends to cause noise. The fitting part of the split pipe is formed in a position close to the connection part with the holder, and a sound deadening body is provided inside the fitting part on the inside, so that the noise of the connecting pipe, which easily generates noise, can be prevented. The noise generated in the extension pipe can be prevented by the sound muffling body in the fitting part, reducing the leakage of noise from the suction port.Also, even if the connecting pipe is bent at the fitting part, the sound muffling body will not fit inside the fitting part. Since it is attached to the curved part of the joint, the muffling body will not bend or move even if the mating part bends and rotates, which makes it necessary to provide a muffler on the extension pipe. The extension tube is made thinner to simplify the design and improve grip operability, and the connecting tube is divided into multiple divided tubes, which can be rotated at least in a direction perpendicular to the cleaning surface. By fitting freely, the extension tube can be brought close to parallel to the cleaning surface, so that spaces such as under desks, beds, etc. or between adjacent ornaments can be easily cleaned. This is what I did.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 4. A flexible hose 3, a bent pipe 4, an extension pipe 5, a connecting pipe 6, and a holder 7 are sequentially connected to a dust case 2 serving as a dust collecting section of the vacuum cleaner 1. This holder 7 is constructed by assembling an upper holder 8 and a lower holder 9 while sealing them with a packing 10 which also functions as a bumper, thereby forming a suction passage 12 in the center of the holder 7, which is partitioned by a partition wall 11. . A suction opening 13 communicating with the suction passage 12 is formed in the center of the lower holder 9, a roller 14 is held at the front edge, and a brush 1 is held at the rear edge.
5 is retained. Thus, the connecting pipe 6 is divided into two split pipes 16 and 17. One of the split pipes 16 is rotatably fitted into one end of the suction passage 12 of the holder 7 while being prevented from coming off.
Of course, the split tube 16 may be formed integrally with the holder 7. At the rear end of one of the split pipes 16, a fitting part 18 is formed which has a curved cross section that is approximately semicircular in a plane perpendicular to the floor surface (cleaning surface) in the state shown in FIG. A substantially circular fitting part 19 that fits into the inner surface of a fitting part 18 is formed at the front end of the split tube 17, and both fitting parts 18 and 19 are rotatable while being prevented from coming off by screws 20 on their sides. Connected and mated. However, the fitting part 1
A muffler 21 is fitted into the inner surface of the pipe 9, and has an outer circumference that matches the fitting portion 19 and an inner circumference that substantially matches the inner diameter of the connecting pipe 6. This muffler 2
1 is made of a foamed material such as polypropylene.

In such a configuration, cleaning is performed by moving the holder 7 along the floor surface. At this time, outside air is sucked from the wide space into the suction passage 12, which suddenly becomes narrower.
In addition, since the connecting pipe 6 is bent because it connects the holder 7 to the extension pipe 5, it tends to generate noise.
1 allows noise to be effectively absorbed in a region close to its source. As a result, the extension tube 5
There is no need to provide a muffling device to the extension tube 5, and the design can be simplified by making the extension tube 5 thinner, and the gripping operability can be improved. In particular, the sound deadening body 2
1 is attached to a curved surface inevitably formed in the fitting portion 19 that bends and rotates, so the outer diameter does not need to be particularly large. Moreover, as shown in FIG. 4, when cleaning the cleaning surface 22 under an obstacle 23 such as a desk or bed, the split tubes 16 and 17 rotate in a direction perpendicular to the cleaning surface 22. By tilting the extension tube 5 in a direction parallel to the cleaning surface 22, interference with the obstacle 23 can be prevented. Conventionally, there are an extension pipe 5 and a bent pipe 4.
A method is taken in which the extension tube 5 is moved closer to the cleaning surface 22 by changing the relative position of the two, but this method is not only cumbersome to operate, but also
Since the extension tube 5 also moves in the left and right directions, it warps and becomes obstructed by walls and the like. However, according to the present invention, the area under the desk or bed can be cleaned by simply lowering the extension tube 5. Even when inserting the holder 7 into a space between an ornament such as a chest of drawers and cleaning the cleaning surface on the side of the ornament, the extension tube 5 can be removed by tilting the holder 7 vertically and bringing the extension tube 5 close to the extension surface of the cleaning surface. This can prevent interference with the sides of the figurine. Further, according to this embodiment, the fitting parts 18 and 19 rotate only in one direction, but one of the split pipes 1
6 is rotatably fitted into the holder 7,
The extension tube 5 can be deflected in all directions and has excellent operability.

As shown in FIG. 5, a fitting part 19 is formed in the split tube 16 on the holder 7 side, and
The fitting part 18 is fitted to the outer surface of the fitting part 19.
may be formed.

Next, a second embodiment of the present invention will be explained based on FIG. 6. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, the split pipe 16,
Fitting portions 24 and 25 having curved cross sections in all directions are formed at the connecting ends of the connecting portions 17. That is, the fitting parts 24 and 25 are spherical and are fitted so as to be rotatable in any direction. The fitting part 24 is
The fitting part 2 is held so as to prevent the fitting part 25 from coming off.
Therefore, the split tube 16 is divided into two parts in the axial direction for convenience of assembly, and is sandwiched between the holder 8 and the lower holder 9 and integrated. Of course, the fitting part 25
A muffler 21 whose outer diameter matches the fitting portion 25 and whose inner periphery substantially matches the inner diameter of the connecting pipe 6 is fitted into the muffler 21 .

Therefore, noise caused by sucking in outside air is absorbed by the muffler 21, and since the extension tube 5 can be moved in all directions, narrow areas can be cleaned freely.

As described above, in this invention, the fitting part of the split pipe is formed in a position close to the connecting part with the holder of the connecting pipe, and the sound damping body is provided inside the fitting part on the inside, so that noise is likely to be generated. It is possible to prevent the generation of noise in the connecting pipe and to suppress the noise generated in the extension pipe with the muffler at the fitting part, reducing the leakage of noise from the suction port. Even if the sound absorber is attached to the curved part of the inner fitting part,
Since the muffling body does not bend, it will not be damaged or move.Furthermore, the fitting part is a split tube, making it easy to install the muffling body.This makes it possible to make the extension pipe thinner. This simplifies the design and improves grip operability. In particular, since the sound damping element is attached to the curved part that is inevitably formed in the mating part, it is not possible to make the outer diameter particularly large. In addition, by dividing the connecting pipe into multiple parts and fitting them so that they can rotate in the direction perpendicular to the cleaning surface, the extension pipe can be moved closer to the direction parallel to the cleaning surface. This has the effect of making it easy to clean surfaces such as the bottom of the room and the side surfaces of adjacent storerooms.

[Brief explanation of the drawing]

Fig. 1 is a reduced side view showing the first embodiment of the present invention, Fig. 2 is an exploded perspective view of the holder and the connecting pipe, Fig. 3 is a vertical sectional side view, and Fig. 4 is the obstruction. FIG. 5 is a side view in a reduced scale showing a state in which the lower cleaning surface is cleaned; FIG. 5 is a vertical sectional side view showing a modification of the connecting pipe; FIG. 6 is a perspective view of a holder showing a second embodiment of the present invention. It is. 2... Dust case (dust collection part), 5... Extension pipe, 6... Connection pipe, 7... Holder, 12... Suction path, 16-17... Split pipe, 18-19... Fitting part , 21... Sound deadening body, 22... Cleaning surface, 24-2
5...Mating part.

Claims (1)

[Claims] 1. A holder is provided with a suction passage that opens toward the surface to be cleaned, and a connecting pipe is provided to connect the suction passage of this holder to an extension pipe connected to the dust collection section of the vacuum cleaner. A plurality of split pipes divided in a direction perpendicular to the axial direction of the connecting pipe are provided at a position close to the connection part with the holder, and each connecting end of these split pipes is at least perpendicular to the cleaning surface. A pair of fitting portions each having a curved cross section are formed so as to be rotatably fitted to each other while being prevented from coming off in the direction, and a curved portion of the fitting portion on the inside has an inner diameter that substantially matches the inner diameter of the connecting pipe. A suction port body for a vacuum cleaner, characterized in that a sound deadening body is attached.