JPH0739482A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To enable a cleaner body to get over a door-sill without being caught thereby. CONSTITUTION:A mounting surface 31 for mounting front wheels 24 is formed on the front side of the botom surface 30 of a cleaner body 23. The mounting surface 31 is inclined downward to the bottom face 30 and provided suspendingly with a shaft part 32 around which a support 33 for supporting a front wheel 24 is rotatably disposed. The height from the bottom face 30 of the cleaner body 23 to the ground contact point of the front wheel 24 is larger than the height from the bottom face 30 of the cleaner body 23 to the ground contact point of the rear wheel 25 so that the cleaner body 23 becomes to be in the state of rising forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner that runs on a floor surface by front and rear wheels.

[0002]

2. Description of the Related Art In a conventional cylinder type vacuum cleaner, as shown in FIG. 6, a cleaner body 1 is provided with a front wheel 2 and a pair of left and right rear wheels 3 which are horizontally rotatable around an axis. The height from the bottom surface 1a of the cleaner body 1 to the grounding point of the front wheel 2 is substantially equal to the height from the bottom surface 1a of the cleaner body 1 to the grounding point of the rear wheel 3, and the bottom surface 1a of the cleaner body 1 is on the floor. It is almost horizontal with a space of about 20 mm from the surface. In FIG. 6, 4 is a suction port for hose insertion into which an end of a hose connected to the suction port body is inserted, 5 is a front handle for lifting the cleaner body 1, 6 is a dust collecting chamber, and 7 is a cleaner body 1. A support body that supports the front wheel 2 that is horizontally rotatably arranged on a shaft portion 8 that is vertically provided on the bottom surface 1a, and 9 is an electric blower.

Further, in Japanese Unexamined Patent Publication No. 4-92635, a spring for urging the base supporting the front wheels toward the floor is provided so as to absorb the shock when the cleaner body moves over a threshold or the like. A structural vacuum cleaner is disclosed. Further, in Japanese Unexamined Patent Publication No. 4-210025, a vibration isolator is provided between the bottom surface of the cleaner body and the rotating body that holds the front wheels, so that a rotation sound of the rotating body and a threshold when the cleaner body is running are provided. An electric vacuum cleaner having a structure that absorbs a shock when riding over is disclosed.

[0004]

In the former vacuum cleaner shown in FIG. 6, the bottom surface 1a of the cleaner body 1 is horizontal with respect to the floor, that is, the cleaner body 1 is held horizontally. It is also necessary to insert the hose into the hose insertion port 4 horizontally with respect to the floor surface, and the user is forced to bend over and perform a heavy operation.
However, it was difficult to insert the hose because the positioning of the suction port 4 and the end of the hose was complicated.

Also, holding the front handle 5, the cleaner body 1
When moving to another room, etc., put a hand between the front handle 5 and the floor surface to lift the front handle 5, but the user is forced to bend down and perform a heavy operation in the same manner as described above. Moreover, the space between the front handle 5 and the floor surface was narrow and it was difficult to put a hand.

Furthermore, when the hose or the like is pulled over the sill S while the vacuum cleaner body 1 is running, the bottom surface 1a of the vacuum cleaner body 1 is substantially horizontal to the floor with an interval of about 20 mm, so the sill If the height of S is 20 mm or less, it can be overcome smoothly. However,
In modern condominiums, the height of the threshold S is 50 mm.
Often designed to the extent that such height is 2
When getting over the sill S that exceeds 0 mm, the bottom surface 1a of the cleaner body 1 hits the sill S and is caught, so that it is not possible to get over smoothly. In addition, with the recent trend toward miniaturization and weight reduction, the dust collection capacity is necessarily kept low in accordance with the miniaturization of the cleaner body 1.

Also in the latter electric vacuum cleaner, since the bottom surface of the cleaner body is substantially horizontal to the floor surface, the bottom surface of the cleaner body is sill when overcoming the sill S more than the distance between the floor surface and the bottom surface. I got caught on S and could not get over smoothly.

In view of the above, an object of the present invention is to provide an electric vacuum cleaner in which the bottom surface of the main body of the vacuum cleaner is raised above the floor surface so that a high threshold can be easily overcome.

[0009]

According to a first aspect of the present invention, a cleaner body 23 has a front wheel 24 and a rear wheel 2.
5, the height from the bottom surface 30 of the cleaner body 23 to the grounding point of the front wheel 24 is the bottom surface 3 of the cleaner body 23.
It is larger than the height from 0 to the ground contact point of the rear wheel 25.

According to the second aspect of the invention, a mounting surface 31 for mounting the front wheel 24 is formed on the front side of the bottom surface 30 of the cleaner body 23, and the mounting surface 31 is inclined downward with respect to the bottom surface 30. The shaft portion 32 is attached to the mounting surface 31.
And a support body 33 for supporting the front wheel 24 is rotatably arranged around the shaft portion 32.

[0011]

In the above means for solving the problems, when a hose or the like is attached to or detached from the front portion of the cleaner body 23, an operation of putting the hand between the bottom surface 30 of the cleaner body 23 and the floor surface and lifting the cleaner body 23, etc. When performing, the cleaner main body 23 is in a state of being raised forward, and therefore, the user does not need to bend down and perform a heavy operation, and the operation can be easily performed.

Further, when the hose or the like is pulled over the sill S while the cleaner main body 23 is running, the front wheel 24 first rides over the sill S, and the mounting surface 31 and the bottom surface 30 having a large distance from the floor are also sill. After passing above S, the rear wheel 25 gets over the threshold S. Therefore, the front wheel 2
Even if the cleaner body 23 becomes slanted after the vehicle 4 has crossed the sill S, the mounting surface 31 and the bottom surface 30 are not caught by the sill S, and the sill S can be smoothly crossed.

When the hose or the like is pulled to change the traveling direction of the cleaner body 23, the support body 33 smoothly rotates around the shaft portion 32, and the front wheel 24 moves the shaft portion 3 accordingly.
Rotate horizontally around 2.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a cylinder type electric vacuum cleaner according to an embodiment of the present invention includes a cleaner body 23 in which a dust collection chamber 21 and a mechanism chamber 22 are installed, and a front center of the cleaner body 23. And a pair of left and right rear wheels 25 arranged on the rear side of the cleaner body 23.

On the front surface of the cleaner body 23, there is formed a hose insertion port 26 into which the end of the hose connected to the suction port body is inserted. A dust collection chamber 21 is communicated with the suction port 26, and a dust collection bag 21a is detachably mounted inside the dust collection chamber 21. A mechanism chamber 22 is formed behind the dust collection chamber 21, and a ventilation port 27 is formed between the dust collection chamber 21 and the mechanism chamber 22. In the mechanism room 22, a hose from the suction port body,
An electric blower 28 that forms an air flow through the suction port 26 to reach the dust collection chamber 21 is provided. A filter 29 is arranged on the front side of the vent hole 27.

The front side of the bottom surface 30 of the cleaner body 23 is a mounting surface 31 for mounting the front wheel 24, as shown in FIGS. 2 and 3, and is inclined downward with respect to the bottom surface 30. A shaft portion 32 is vertically provided at the center of the mounting surface 31, and a bowl-shaped support body 33 that supports the front wheel 24 is rotatably arranged around the shaft portion 32. A concave front handle 35 for lifting the cleaner body 23 is formed on the front side of the mounting surface 31.

At the center of the support 33, as shown in FIG.
A fitting cylinder 36 for fitting in the shaft portion 32 is formed. Further, at the tip of the shaft portion 32, an engagement claw 37 that engages with the flange portion 36a of the fitting cylinder 36 is formed to project in a direction orthogonal to the axial direction. This can prevent the support body 33 from coming off the shaft portion 32.

The front wheel 24 is rotatably supported by the rear portion of the support 33 via an axle 24a, and the shaft portion 3
It is supposed to be rotatable around 2. The rear wheel 25 is a disc-shaped member having a boring hole, and an axle is integrally provided at the center of the rear wheel 25. The shaft portion of the rear wheel 25 is rotatably supported on both side surfaces of the cleaner body 23.

The height H from the ground contact point of the front wheel 24 to the mounting surface 31 directly above it is the height H from the ground contact point of the rear wheel 25 to the bottom surface 30 immediately above it ( 20 mm). As a result, the cleaner body 23
Indicates that the approach angle θ becomes large and the front angle rises, and the bottom surface 3 is smaller than when the bottom surface is parallel to the floor surface.
The distance between 0 and the floor is wide.

In the above structure, when the end of the hose is inserted into the suction port 26 of the cleaner body 23, since the cleaner body 23 is in the front rising state, the suction port 26 is also opened obliquely upward and upward. It is possible to insert the hose into the suction port 26 while tilting the end of the hose obliquely downward while visually observing the suction port 26. For this reason, the user does not need to perform a heavy bending operation as in the conventional case, and can easily insert the hose. On the other hand, even when the hose is pulled out, the hose can be pulled out easily without forcing the user to perform a heavy operation.

Also, when the cleaner body 23 is moved to another room by lifting the front handle 35, the cleaner body 23
Since the space between the floor surface and the front handle 35 is wide in a state where the front handle is raised, it is easy to insert a hand between the front handle 35 and the floor surface. Therefore, it is possible to easily lift the front handle 35 and move the cleaner body 23 to another room or the like.

Further, as shown in FIG. 4, the cleaner body 2
When the hose or the like is pulled over the sill S during traveling of 3, the sill S first comes into contact with the front part of the support 33 and the cleaner body 23 is lifted. Then, when the front wheel 24 gets over the threshold S, the mounting surface 3 is widened from the floor surface.
1 and the bottom surface 30 pass above the sill S, and then the rear wheel 25 gets over the sill S. Therefore, even if the sill S has a height of about 50 mm in a recent condominium or the like, and the mounting surface 31 and the bottom surface 30 become the sill S even if the cleaner body 23 becomes slanted after the front wheel 24 gets over the sill S. You can get over the threshold S smoothly without getting caught.

Further, by pulling a hose or the like, the cleaner main body 2
When the traveling direction of 3 is changed, the support body 33 is rotatably arranged on the shaft portion 32 vertically provided on the mounting surface 31, so that the support body 3 is inclined even though the mounting surface 31 is inclined downward.
3 smoothly rotates along the mounting surface 31, and accordingly, the front wheel 24 horizontally rotates around the shaft portion 32. In addition, according to this structure, the cleaner body 23 travels more than when the support body is arranged on the shaft portion formed in the direction perpendicular to the floor surface and a gap is created between the mounting surface and the support body. At times, the load on the shaft portion 32 can be reduced, and the support body 33 can smoothly rotate around the shaft portion 32.

As described above, since the approach angle θ of the cleaner body 23 is large and the cleaner body 23 is in a state of rising forward, attachment / detachment of the hose to / from the suction port 26 and front handle 35.
Can be easily lifted, obstacles are less likely to hit the front surface of the cleaner body 23 as compared with the conventional case, and the sill can be smoothly crossed.

Further, although the mounting surface 31 is inclined downward, the support body 33 can smoothly rotate around the shaft portion 32, and accordingly, the front wheel 24 can smoothly rotate horizontally.

Further, since the mounting surface 31, that is, the bottom portion of the dust collecting chamber 21 is inclined downward with respect to the bottom surface 30 of the cleaner body 23, the dust collecting chamber 21 is widened correspondingly, and the dust collecting capacity can be increased.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention. For example, as shown in FIG. 5, the mounting surface 31 is flush with the bottom surface 30,
The size of the support 33 and the front wheel 24 may be relatively large, and the cleaner body 23 may be in a front-up state.

[0028]

As is apparent from the above description, according to claim 1 of the present invention, since the cleaner main body is in a state of being raised forward, attachment / detachment of a hose or the like at the front portion of the cleaner main body and the cleaner main body The operation of putting a hand between the bottom surface and the floor surface and lifting the main body of the cleaner can be performed more easily than before.

When the vacuum cleaner body is pulled over the sill by pulling a hose or the like while the cleaner body is running, the bottom of the vacuum cleaner body is caught in the sill because the distance between the bottom surface and the floor surface is wide when the vacuum cleaner body is in the front rising state. You can smoothly overcome the threshold without forgetting.

According to the second and third aspects, the same effect as that of the first aspect is obtained, and since the mounting surface is inclined downward with respect to the bottom surface of the cleaner body, the capacity in the cleaner body is increased accordingly. To do. Therefore, there is an excellent effect that the dust collection chamber can be widened and the dust collection capacity is increased accordingly.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an electric vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a sectional view of a shaft portion on a mounting surface.

FIG. 3 is a sectional view of a front wheel mounting portion.

FIG. 4 is a partially cutaway side view of the electric vacuum cleaner when overcoming the threshold.

FIG. 5 is a partially cutaway side view of an electric vacuum cleaner showing another embodiment.

FIG. 6 is a sectional view of a conventional vacuum cleaner.

[Explanation of symbols]

 21 Dust Collection Room 23 Vacuum Cleaner Main Body 24 Front Wheel 25 Rear Wheel 28 Electric Blower 30 Bottom 31 Mounting Surface 32 Shaft 33 Support

Claims (3)

[Claims] 1. A vacuum cleaner main body having an electric blower and a dust collection chamber installed therein, a front wheel arranged on the front side of the vacuum cleaner main body, and a rear wheel arranged on the rear side of the vacuum cleaner main body. In the electric vacuum cleaner, the height from the bottom surface of the vacuum cleaner body to the grounding point of the front wheel is greater than the height from the bottom surface of the vacuum cleaner body to the grounding point of the rear wheel. Machine. 2. A cleaner main body having an electric blower and a dust collecting chamber installed therein, a front wheel arranged on the front side of the cleaner main body, and a rear wheel arranged on the rear side of the cleaner main body. In the vacuum cleaner, a mounting surface for mounting the front wheel is formed on a front side of a bottom surface of the cleaner body, and the mounting surface is inclined downward with respect to the bottom surface. 3. The vacuum cleaner according to claim 2, wherein a shaft portion is vertically provided on the mounting surface, and a support body for supporting the front wheel is rotatably arranged around the shaft portion.