JP2013031569A - Suction tool for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool for a vacuum cleaner, the suction tool capable of reducing noise that is generated in a suction tool body and passes through the upper face side.SOLUTION: The suction tool for the vacuum cleaner includes the suction tool body having a case part which has an inlet installed in the bottom face, with an elbow joint connected in the rear part. The case part is configured to have a first upper case assembled on the upper side of a lower case and then to have a second upper case fixed on their upper side. The lower case has an opening to be the inlet installed in the lower face, with a through part provided communicating with the opening and penetrating the lower case vertically. Between the first and second upper cases, there is formed a spatial part above the through part.

Description

  The present invention relates to a vacuum cleaner suction tool.

  In the vacuum cleaner suction tool in the past, the purpose is to reduce the noise generated in the elbow joint connected to the suction tool main body having the suction port, on the lower inner wall of the suction path of the elbow joint. In addition, one in which a convex portion for reducing the cross-sectional area of the flow path in the universal joint portion is formed is known (for example, see Patent Document 1).

  Another object of the present invention is to reduce noise generated when air containing dust sucked from the suction port of the suction tool main body passes through the dust passage in the elbow joint leading from the suction tool main body to the hose at high speed. As an object, the shelf rib is extended to the suction port side on the inner wall of the elbow joint, and the elbow joint is provided with a sliding contact wall that is in sliding contact with the suction body when the elbow joint is tilted. Is formed, and a plurality of holes communicating with the space portion and the dust passage are provided in the shelf rib (see, for example, Patent Document 2).

Japanese Patent No. 3528689 Japanese Patent No. 3624653

  Thus, the conventional vacuum cleaner suction tool shown in Patent Document 1 and Patent Document 2 is provided with a convex part and a shelf rib that rectify the air flow in the elbow joint connected to the suction tool body. It is intended to reduce noise generated by elbow joints.

  However, in these conventional vacuum cleaner suction tools, the noise generated by the air sucked from the suction port of the suction tool body colliding with the inside of the upper surface (upper case) of the suction tool body is considered. There is no problem. In addition, the driving sound when rotating the rotating brush built in the suction tool body passes through the upper surface side (upper case) of the suction tool body and is transmitted to the user of the vacuum cleaner, which makes it feel noisy. There are also challenges.

  The present invention has been made to solve such problems, and noise generated by the air sucked from the suction port colliding with the inside of the upper surface portion (upper case) of the suction device main body and the upper surface of the suction device main body. The vacuum cleaner suction tool capable of reducing the driving noise of the rotating brush that passes through the side (upper case) is obtained.

  The vacuum cleaner suction tool according to the present invention is a vacuum cleaner suction tool including a suction tool body having a case portion provided with a suction port on a bottom surface and connected to an elbow joint at a rear portion thereof. The first upper case is combined with the upper side of the lower case, and the second upper case is further fixed to the upper side of the first upper case and the lower case. An opening serving as the suction port is provided on the lower surface, and a penetrating portion that communicates with the opening and vertically penetrates the lower case is provided between the first upper case and the second upper case. Has a configuration in which a space is formed above the penetrating portion of the lower case.

  In the vacuum cleaner suction tool according to the present invention, the noise generated in the suction tool body and the noise transmitted through the upper surface side of the suction tool body can be reduced.

It is a figure which shows the whole structure of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a perspective view of the suction tool main body which concerns on Embodiment 1 of this invention. It is a top view of the suction tool main body which concerns on Embodiment 1 of this invention. It is a bottom view of the suction tool main body which concerns on Embodiment 1 of this invention. It is a side view of the suction tool main body which concerns on Embodiment 1 of this invention. It is side sectional drawing of the suction tool main body which concerns on Embodiment 1 of this invention. It is a top view of the 1st upper case which comprises the suction tool main body which concerns on Embodiment 1 of this invention. It is a top view of the 2nd upper case which comprises the suction tool main body which concerns on Embodiment 1 of this invention. It is a top view which shows the state which combined the 1st upper case and 2nd upper case which concern on Embodiment 1 of this invention. It is a top view of the lower case which comprises the suction tool main body which concerns on Embodiment 1 of this invention. It is a perspective view of the sound-absorbing material according to Embodiment 2 of the present invention. It is side sectional drawing of the suction tool main body which concerns on Embodiment 2 of this invention. It is a figure corresponded in sectional drawing cut | disconnected by the cross section II in FIG. 3 which concerns on Embodiment 2 of this invention.

  The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
FIGS. 1 to 10 relate to Embodiment 1 of the present invention, FIG. 1 is a diagram showing the overall configuration of the vacuum cleaner, FIG. 2 is a perspective view of the suction tool body, and FIG. 3 is a plan view of the suction tool body. 4 is a bottom view of the suction tool body, FIG. 5 is a side view of the suction tool body, FIG. 6 is a side sectional view of the suction tool body, and FIG. 7 is a plan view of a first upper case constituting the suction tool body. 8 is a plan view of a second upper case constituting the suction tool body, FIG. 9 is a plan view showing a state in which the first upper case and the second upper case are combined, and FIG. 10 is a suction tool body. It is a top view of the lower case which comprises.

  In FIG. 1, 1 is a suction tool main body. On the bottom surface of the suction tool main body 1, a suction port 1a is provided for sucking air (dust-containing air) containing dust and dust on the surface to be cleaned such as the floor surface. One end of a hollow cylindrical suction pipe 2 is connected to the suction tool body 1. The other end of the suction pipe 2 is connected to one end of a flexible bellows-like hose 3 via a connection pipe that is bent in the middle.

  The other end of the hose 3 is connected to the cleaner body 4. In the cleaner body 4, there is provided a dust collecting portion 4 a that captures and collects dust (dust) in the dust-containing air that has flowed into the interior from the outside of the cleaner body 4. And from the suction inlet 1a of the suction tool main body 1 to the dust collecting part 4a of the cleaner main body 4 is connected via the suction pipe 2 and the hose 3, and the suction tool main body 1, the suction pipe 2 and the hose 3 are included. A suction path for allowing dust air to flow from the outside to the inside of the cleaner body 4 is configured.

  The vacuum cleaner body 4 includes an electric blower 4b. This electric blower 4b is for driving a suction operation for sucking dust-containing air from the suction port 1a of the suction tool body 1 to the dust collecting part 4a of the cleaner body 4 via the suction pipe 2 and the hose 3. It is. On the other end side of the suction pipe 2, there is provided a grip portion 5 in which an operation switch for controlling the operation of the cleaner body 4 is arranged. The user of the electric vacuum cleaner pulls the vacuum cleaner body 4 by holding the grip portion 5 in use.

  The external appearance of the suction tool main body 1 is shown in FIGS. The suction tool main body 1 has a case part configured by combining the first upper case 6, the second upper case 7, and the lower case 8, and an elbow joint 9 connected to the rear part of the case part. doing. The suction tool body 1 is detachably connected to the suction pipe 2 via an elbow joint 9. The elbow joint 9 is attached to the case portion so as to be tiltable at a predetermined angle in the vertical direction, and further has a structure that is rotatable about an axis orthogonal to the tilt axis. ing.

  The case portion is configured by combining the first upper case 6 on the upper side of the lower case 8, and further fixing the second upper case 7 on the upper side of the first upper case 6 and the lower case 8. ing. Further, a rotating brush 10 for scraping dust on the surface to be cleaned is provided in the case portion so as to face the suction port 1a. The rotation of the rotary brush 10 is driven by a motor accommodated in the case portion. In addition, although there exists a thing using the turbine which utilizes the airflow which arises by attraction | suction force as a motive power apparatus which rotationally drives the rotating brush 10, in this Embodiment, it demonstrates using the motor as a motive power apparatus.

  As shown in FIGS. 4, 6, and 10, the lower case 8 is provided with an opening serving as a suction port 1 a on the lower surface thereof, and is substantially above the suction port 1 a along the cross-sectional shape of the rotary brush 10. A brush accommodating portion 8b having an arched cross section is provided. A through portion 8a that penetrates the lower case 8 up and down communicates with the suction port 1a and is formed at substantially the center of the lower case 8.

  As shown in FIGS. 6 and 7, the first upper case 6 is formed with a recessed region at the approximate center of the upper surface thereof. In the recessed area, a plurality of through holes 6a penetrating the upper surface side and the lower surface side of the first upper case 6 are formed.

  The second upper case 7 shown in FIG. 8 does not cover the entire upper surface area of the first upper case 6, but when combined with the first upper case 6, as shown in FIG. It is provided so as to cover a part of the case 6. That is, the second upper case 7 is disposed on the upper surface side of the first upper case 6 so as to cover at least a recessed region provided on the upper surface of the first upper case 6.

  When assembling, first, the second upper case 7 is fixed to a predetermined position on the upper surface of the first upper case 6 to obtain the state shown in FIG. The case of the suction tool main body 1 is completed by combining the assembly of the upper case 7 and the lower case 8. When the assembly of the first upper case 6 and the second upper case 7 and the lower case 8 are combined, the elbow joint 9 and the rotating brush 10 are also attached to the suction tool body 1 together. At this time, the rotating brush 10 is disposed in a state of being accommodated in the brush accommodating portion 8 b portion of the lower case 8.

  The structure of the suction tool main body 1 assembled in this way will be described with reference to the sectional view of FIG. First, in the suction tool main body 1 assembled as described above, a joint opening provided at the end of the elbow joint 9 on the case part side from the suction port 1a through the through part 8a of the lower case 8 The state up to 9a is in communication.

  A space portion 11 is formed between the first upper case 6 and the second upper case 7. The space 11 is in contact with the upper surface of the first upper case 6 and the end of the second upper case 7, and the peripheral edge of the recessed area of the first upper case 6 and the lower surface of the second upper case 7. Is formed in a portion sandwiched between the first upper case 6 and the second upper case 7. The space portion 11 is disposed above the penetrating portion 8 a of the lower case 8. More specifically, the space portion 11 is arranged so that the shape of the space portion 11 projected on the projection plane parallel to the bottom surface of the suction tool body 1 includes the shape of the penetration portion 8a of the lower case 8 projected onto the projection surface. It is desirable that

  In the suction tool main body 1 configured as described above, when the electric blower 4b of the cleaner main body 4 operates, the negative pressure generated by the electric blower 4b propagates from the hose 3 to the suction pipe 2, and the suction tool A force for sucking dust-containing air near the surface to be cleaned is generated at the suction port 1a of the main body 1. Then, the dust-containing air sucked from the suction port 1a of the suction tool main body 1 passes through the through portion 8a of the lower case 8 and reaches the suction pipe 2 from the joint opening 9a via the elbow joint 9 and finally. Thus, the vacuum cleaner body 4 is sucked.

  At this time, the air flow sucked from the suction port 1a and reaching the joint opening 9a reaches the joint opening 9a at the rear of the suction tool main body 1 after passing through the through-hole 8a of the lower case 8, so that the suction port After passing through the penetrating part 8a from 1a, the direction of the air flow is changed from upward to backward in the case part of the suction tool body 1. And in this change in the direction of the air flow, there are not a few components that collide with the lower surface of the first upper case 6 after passing through the through-hole 8a.

  The collision of the air flow with the first upper case 6 contributes to the generation of noise in the suction tool main body 1 during the operation of the cleaner main body 4, but the air flow that has passed through the through-hole 8a collides. Due to the action of the space portion 11 formed at the location to be performed, it is possible to reduce noise transmitted through the upper surface (the first upper case 6 and the second upper case 7) of the case portion.

  Further, since the air flow path from the through portion 8a to the joint opening 9a and the space portion 11 are connected by the through hole 6a provided in the first upper case 6, the collision of the air flow and the like It is possible to alleviate the fluctuation of the air pressure generated by the above, and it is possible to suppress the noise generation itself due to the collision of the air flow with the first upper case 6 or the like. Further, here, by taking the corner of the edge of the through hole 6a on the side opposite to the space 11 to make a smooth R shape, dust or the like contained in the air flow from the through part 8a to the joint opening 9a It is possible to prevent catching on the through hole 6a.

  By the way, as noise generated in the suction tool body 1, there are other noises accompanying rotation of the rotary brush 10. At this time, among the noise generated by the rotation of the rotary brush 10 in the case part of the suction tool body 1, the noise reaching the ear of the user of the vacuum cleaner has been transmitted through the upper surface of the case part of the suction tool body 1. Although there are many things, the upper surface of the case portion (first upper case 6) is formed by the action of the space portion 11 formed by the first upper case 6 and the second upper case 7 on the upper surface of the case portion of the suction tool body 1. In addition, noise caused by the rotating brush 10 passing through the second upper case 7) can also be reduced.

  Here, the first upper case 6 is provided with the through hole 6a that connects the space portion 11 and the air flow path in the case portion. However, the through hole 6a is not necessarily provided. If the through hole 6a is not provided, the effect of alleviating the above-described fluctuation in air pressure cannot be obtained. However, since the space portion 11 becomes an air layer that is completely sealed, a sound wave that is transmitted through the upper surface of the case portion is not generated. It can be expected that the effect of attenuation increases.

Embodiment 2. FIG.
11 to 13 relate to the second embodiment of the present invention, FIG. 11 is a perspective view of the sound absorbing material, FIG. 12 is a side sectional view of the suction tool body, and FIG. 13 is a sectional view of FIG. It is a figure corresponded in sectional drawing cut | disconnected by a.

  The second embodiment described here is a configuration in which the sound absorbing material is arranged in the space provided on the upper surface of the suction tool main body case portion in the configuration of the first embodiment described above.

  That is, as shown in FIGS. 12 and 13, the sound absorbing material 12 as shown in FIG. 11 is arranged in the space portion 11 formed between the first upper case 6 and the second upper case 7. Yes. The sound absorbing material 12 is made of a porous material such as an independent foam material (for example, urethane or felt), or a material for a vibration isolating material such as a vibration isolating rubber. Other configurations are the same as those in the first embodiment, and detailed description thereof is omitted.

  In the suction tool main body 1 configured in this manner, the upper surface (the first upper case 6 and the second upper case 7) of the case portion is transmitted by the action of the space portion 11 as in the first embodiment. Noise (including those caused by airflow collisions and those caused by the rotating brush 10) can be reduced. At this time, the sound wave to be transmitted can be absorbed or attenuated by the sound absorbing material 12 accommodated in the space 11, and a further noise reduction effect can be obtained.

  Further, since the through hole 6a is provided in the space 11 portion of the first upper case 6, air pressure fluctuations in the air flow path from the through part 8a to the joint opening 9a are transmitted through the through hole 6a. It is possible to effectively absorb fluctuations in air pressure (that is, sound waves) by the sound absorbing material 12 introduced into the portion 11 and disposed in the space portion 11. Therefore, in the second embodiment, it is preferable to provide the first upper case 6 with a through hole 6a.

DESCRIPTION OF SYMBOLS 1 Suction tool main body 1a Suction port 2 Suction pipe 3 Hose 4 Vacuum cleaner main body 4a Dust collection part 4b Electric blower 5 Gripping part 6 1st upper case 6a Through-hole 6b Rib 7 2nd upper case 8 Lower case 8a Through part 8b Brush housing portion 9 Elbow joint 9a Joint opening 10 Rotating brush 11 Space portion 12 Sound absorbing material

Claims (5)

A suction tool for a vacuum cleaner comprising a suction tool body having a case part provided with a suction port on the bottom and having an elbow joint connected to the rear part,
The case portion is configured by combining the first upper case on the upper side of the lower case, and further fixing the second upper case on the upper side of the first upper case and the lower case,
The lower case is provided with an opening serving as the suction port on a lower surface thereof, and a penetrating portion that communicates with the opening and penetrates the lower case up and down is provided.
A vacuum cleaner suction tool, wherein a space is formed between the first upper case and the second upper case above the penetrating portion of the lower case.   The space portion is arranged such that a shape obtained by projecting the space portion on a projection plane parallel to the bottom surface of the suction tool body includes at least a shape obtained by projecting the penetrating portion onto the projection surface. The vacuum cleaner suction tool according to claim 1.   The vacuum cleaner suction tool according to claim 1, further comprising a through-hole provided in a portion of the first upper case where the space portion is disposed.   The vacuum cleaner suction tool according to claim 3, further comprising a sound absorbing material disposed inside the space.   The vacuum cleaner suction tool according to claim 3, wherein an edge portion of the through hole on the side opposite to the space portion has a smooth R shape.

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