JPH0798035B2 - Vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner suitable for running stability of a cleaner body.

[Conventional technology]

In a conventional vacuum cleaner, when cleaning a high place such as a direction change or a ceiling or a kamoi, the vacuum cleaner body does not follow the movement of the hose and falls down. Conventionally, as a plan to improve these, there are examples in which the hose can be freely rotated 360 degrees on the upper surface of the cleaner body, or the cleaner itself can be rotated, as seen in Japanese Utility Model Publication No. 43-29421.

[Problems to be Solved by the Invention]

The above-mentioned prior art is such that when changing the direction of the vacuum cleaner on a thick cloth, the wheels and casters deeply squeeze into the cloth and the wheel operation is bad when the direction is changed and the cleaner is pulled from the rear. I was falling.

An object of the present invention is to provide an electric vacuum cleaner having good traveling stability of the cleaner body.

[Means for Solving the Problems] A feature of the present invention in order to achieve the above-mentioned object is that a vacuum cleaner having a dust collecting portion for accommodating a filter and an electric blower therein and having a hose mounting opening formed at a front portion thereof is provided. A main body, a wheel stand arranged so as to be rotatable relative to the cleaner body, a plurality of casters projectingly formed on the outside of the wheel stand, the cleaner body and the mounting table. each,
Rotation restricting means for restricting both rotations is provided, and in the rotation restricting means, one of the plurality of casters and the hose mounting opening is provided with the cleaner body and the wheel stand. It is arranged so that it is regulated at the opposite position with the center of rotation between and.

[Action]

According to the present invention, the rotation of the cleaner body with respect to the wheel stand is suppressed in a state in which the hose attachment port and any one of the casters are at opposite positions with the center of rotation therebetween. , The vacuum cleaner body is pulled backwards via the hose with the axis of one caster as a fulcrum, so that the turning performance to the rear becomes unstable, and the vacuum cleaner body can easily turn and change to the rearward direction. . In the state where the hose attachment port and the caster are not on the line sandwiching the rotation center, the rotation of the cleaner body with respect to the wheel base is not suppressed, so that the direction is easily changed and running stability is not impaired.

〔Example〕

An embodiment of the electric vacuum cleaner of the present invention will be described below with reference to the drawings. The cleaner body 1 is composed of an electric blower 2, a cord reel 4 around which a power cord 3 is wound, and a dust collecting portion 6 in which a paper bag filter 5 is housed. The dust collecting portion 6 is provided with a dust collecting lid 7. . The vacuum cleaner body 1 has a hemispherical upper case 1a and a lower case 1b.
Consists of. The cleaner body 1 has the caster 8 protruding from the cleaner body 1 and mounted on all four sides, and the cleaner body 1
On the other hand, it is provided with a wheel stand 10 which can be rotated via a rotation shaft 9.

Explaining each part further, the electric blower 2 includes a vibration-proof rubber 1
It is held by the cleaner body 1 so as to be clamped from both sides by 1,12. A sound absorbing cover 13 and a sound insulating wall 14 are provided around the electric blower 2. A sound deadening cylinder 15 is integrally formed with the sound insulation wall 14. The dust collecting part 6 is provided with an inner case 16 that is in contact with the vibration isolating rubber 12 on the front side of the electric blower 2.
Inside the inner case 16, a filter material is stretched and a box-shaped outer filter 17 is mounted. The paper bag filter 5 can be set inside the outer filter 17. An airtight packing 18 is provided around the opening of the outer filter 17. The airtight packing 18 and the opening end of the inner case 16,
It is configured to contact the back cover 18 of the dust collecting lid 7 to keep the dust collecting portion 6 airtight. Further, the dust collecting lid 7 is provided with a hose attachment port 20 to which a hose 19 can be detachably attached. The paper bag filter 5 is attached and detached by releasing the clamp 21 and opening and closing the dust collecting lid 7.

On the upper surface of the cleaner body 1, a carrying handle 22 and a dust meter 23 for displaying the clogging amount of the filter are provided. A plurality of wheels 24 are attached to the bottom surface of the cleaner body 1 and contact the inner surface of the wheel stand 10 to make the rotation of the cleaner body 1 and the wheel stand 10 smooth. Also wheels
An elastic material 24a is also provided on the outer periphery of 24 so as to reduce running noise.

The wheel stand 10 is fixed to the lower case 1b of the cleaner body 1 from below the rotating shaft 9 with a screw via a washer, and can rotate about the rotating shaft 9, but when rotated about 360 degrees. The stopper 25a formed on the outer periphery of the lower case 1b is projected onto the wheel base 10.
The stopper 25b formed on the inner surface of the stopper hits the stopper 25b and its rotation is suppressed. In other words, it can rotate 360 degrees to the right and 360 degrees to the left.

The stopper 25b is formed at a position avoiding the running line of the wheel 24, and the stopper 25a and the stopper 25b are in a state in which the hose mounting port 20 and one of the casters 8 are opposite to each other with the rotary shaft 9 interposed therebetween. It is formed so that the rotation of the wheel base 10 with respect to the wheel base 10 is suppressed. The stopper may be formed on the side wall of the lower case 1b and the wheel stand 10.

Further, the wheel stand 10 is formed in a substantially circular shape when viewed from above. The caster 8 is provided so as to protrude from the outer shape of the cleaner body 1. The wheel base 10 is provided with a caster cover 26 so as to cover the caster 8. A bumper 27 is arranged around the caster cover 26 and the wheel stand 10 to prevent damage to furniture or the like. The bumper 27 forms the outermost shape of the cleaner body 1.

An exhaust port 28 and a power cord outlet 29 are provided on the rear side of the cleaner body 1.

In the above configuration, when using a vacuum cleaner, connect the hose 19, extension pipe 30, and suction port 31 to the hose mounting port 20 of the vacuum cleaner body 1, pull out the power cord 3 from the cord outlet 29, and plug the outlet ( (Not shown). Then the hose
19 When the operation switch 32 at the tip end is turned on, the electric blower 2 is operated, and the air flow containing a large amount of dust from the suction port 31 due to the suction force passes through the extension pipe 30 and the hose 19 and enters the dust collecting unit 6. The filter 5 separates dust and clean air,
Only the clean air flow passes through the electric blower 2 and the muffler cylinder 15 and is discharged from the exhaust port 28 at the rear part. When the room is cleaned in this state, the bumper 27 protects the furniture 33 and the like from damage even when the wheel stand 10 and the caster cover 26 part hit the obstacle 33 such as furniture placed in the room.

Further, in the present vacuum cleaner, since the cleaner main body 1 can rotate on the wheel base 10, it is easy to change the direction of the hose 19 in a small room or the like, and moreover, the direction of the surface to be cleaned is changed by the caster 8. Instead, the wheel 24 is rotated by the wheel 24 between the wheel base 10 and the cleaner main body 1, so that it is possible to operate lightly without being affected by the rotation on the surface to be cleaned. On the contrary, even if the caster cover 26 or the like pulls the cleaner body 1 around and catches on the feet of a table or the like as shown in FIG. The vacuum cleaner can be moved smoothly even in a room with a lot of furniture.

In addition, the vacuum cleaner body 1 and the wheel base 10 are approximately left and right within a range in which the hose attachment port 20 and one of the casters 8 are substantially in line.
Since the cleaner body 1 is rotated by 0 ° and the cleaner body 1 does not rotate indefinitely with respect to the wheel stand 10 and limits the rotation angle, the power cord 3 does not endlessly wind around the wheel stand 10, and the power plug and You can avoid applying excessive tension to the cord.

By the way, when the rotation of the cleaner body 1 with respect to the wheel stand 10 is suppressed in a state in which two of the casters 8 are rearward and are substantially symmetrical with respect to an imaginary line connecting the hose attachment port 20 and the rotation shaft 9, , Turn around on a long-haired cloth,
When the hose 19 is pulled upward in order to clean the ceiling or the duck, the cleaner body 1 is stably rotated around the shafts of the two casters as fulcrums, so that it is easy to fall backward. However, when at least one caster is arranged on an imaginary line connecting the hose attachment port 20 and the rotary shaft 9 as in the present embodiment, the shaft of one caster serves as a fulcrum, so that the vacuum cleaner is used. The rotation axis of the main body toward the rear becomes unstable, and it swings to the left and right, so that the direction of the main body of the vacuum cleaner can be easily changed and it is difficult to fall backward.

Further, in the vacuum cleaner of the present embodiment, the caster 9 is disposed so as to project to the outside of the cleaner main body 1, and the bumper 27 of the cleaner main body 1 is configured to have the maximum outer shape portion, so that the cleaner 9 contacts the obstacle. Even if the cleaner main body 1 side to which the hose 19 is attached is fixed, the lower wheel stand 10 can be rotated and avoided.

In addition, since the root of the caster portion that is overhanging is tied to the outer circumference of the wheel stand 10 in a smooth shape, it can slip even if it hits an obstacle, and it is possible to avoid it. Since the direction is set, it is structured so that it is possible to smoothly change directions and overcome thresholds.

Further, according to the present embodiment, since the electric blower 2 and the cord reel 4 are arranged at a low position, a low center-of-gravity structure can be adopted even when the cleaner falls, which is advantageous for the fall.

Further, since the electric blower 2 part covers the wheel base 10 from the outside, the noise generated from the electric blower 2 has a double case structure due to the case of the lower case 1b and the wheel base 10. By increasing the number, noise can be further reduced. Since the shape of the vacuum cleaner body 1 and the wheel stand 10 when viewed from above is close to a perfect circle, rotation can be performed with a minimum radius even when changing directions in a narrow portion.

Further, in the present embodiment, the exhaust port 28 is provided at the rear part of the cleaner body 1, but it may be a distributed exhaust port that exhausts from the entire circumference of the sliding part 34 between the cleaner body 1 and the wheel stand 10.

〔The invention's effect〕

According to the present invention, the rotation of the cleaner body with respect to the wheel stand is suppressed in a state in which the hose attachment port and any one of the casters are at opposite positions with the center of rotation therebetween. Since the cleaner main body is pulled rearward through the hose with the shaft of one caster as a fulcrum, the backward rotatability becomes unstable, and the cleaner main body can easily rotate and change backward.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a sectional view of an essential part, FIG. 2 is a perspective view of the entire appearance showing a cleaning state, FIG. 3 is an appearance view from the top of the cleaner body, and FIG. The figure is an explanatory view showing the state of obstacle avoidance, FIGS. 5 and 6 are schematic diagrams for explaining the operation,
FIG. 7 is a perspective view of the dust collecting part, and FIG. 8 is an enlarged cross-sectional view of the main part. 1 ... Vacuum cleaner main body, 2 ... Electric blower, 6 ... Dust collecting part, 8 ... Canister, 9 ... Rotating shaft, 10 ... Wheel stand, 20 ... Hose mounting port, 25a, 25b ... Stopper.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuro Nakazato 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Taga factory (56) References: Actual publication Sho 50-22668 (JP, U) Actual public Sho-39-36303 (JP, Y1)

Claims (1)

[Claims] 1. A cleaner main body having a dust collecting part for accommodating a filter and an electric blower and having a hose mounting opening formed in a front part thereof, and the cleaner main body being rotatably arranged relative to the main body. A wheel base, a plurality of casters projectingly formed on the outside of the wheel base, and rotation control means for restricting rotation of both of the cleaner body and the mounting table, The rotation restricting means is arranged such that one of the plurality of casters and the hose mounting opening restrict at a position opposite to each other with the center of rotation of the cleaner body and the wheel stand sandwiched therebetween. An electric vacuum cleaner characterized in that.