JPH01160514A - Cleaner of upright type - Google Patents

Abstract

PURPOSE: To ensure a constant cleaning ability by changing the height of the front and rear sections of a cleaner body against the floor at a specified relation when a handle body is tilted. CONSTITUTION: A fulcrum base 7 has an engaging surface which lowers in the forward direction until a line connecting a rotating center 11 of a handle body 2 and a rotating center 12 of a rear wheel 3 becomes vertical to a floor 9 when the handle body 2 is tilted, and rises in the forward direction when the handle body 2 is continuously tilted and the center 11 moves to the rear of the center 12. That is, when the handle body 2 is tilted, an arm body 5 is pressed in the forward direction and engaged with the fulcrum base 7 and slid, then moves in the lower-forward direction, and a front wheel 4 also moves in the lower-forward direction. When the handle body 2 is continuously tilted, the rear of a cleaner body 1 moves to its highest position by the rear wheel 3, and the front of the cleaner body 1 moves to its highest position by the front wheel 4. When the handle body 2 is continuously tilted, the rear becomes lower, the front wheel 4 becomes higher, and the front of the cleaner body 1 becomes lower. A result is that the height of a suction port 8 to the floor 9 is almost kept constant, and the suction port 8 is almost parallel to the floor 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to an upright cleaner, and more particularly to an upright cleaner that can maintain a constant distance between the suction port of the cleaner body and the floor surface to be cleaned.

(b) Conventional technology Conventionally, as an upright type cleaner, JP-A-59-1
There is one shown in Publication No. 6773.

(c) Problems to be Solved by the Invention In conventional upright cleaners, when the handle body is tilted relative to the cleaner body, the cleaner body also tilts. For this reason, there was a problem in that the distance and parallel state between the suction port of the vacuum cleaner body and the floor surface to be cleaned changed due to tilting, which was unfavorable in terms of cleaning efficiency (see Figures 9 to 10 above). .

This invention has been made in view of the above-mentioned circumstances, and it is an up-gradation device in which the distance between the suction port of the vacuum cleaner body and the surface to be cleaned remains almost constant and almost parallel even when the handle body is tilted with respect to the vacuum cleaner body. It provides a light type cleaner.

(d) Means for Solving the Problems This invention allows the suction port to be kept almost parallel to the surface to be cleaned regardless of the tilting of the handle body with respect to the vacuum cleaner body by changing the distance of the front wheel to the vacuum cleaner body. This is an upright type cleaner configured to maintain a certain distance.

The detailed structure consists of a vacuum cleaner body with a suction port in the front part of the body, a handle body pivotably supported to be tiltable with respect to the vacuum cleaner body, and a pivot supported at the rear of the lower end of the handle body. A rear wheel, an arm body having one end pivotally supported by the handle body, the other end extending forward, and the front wheel being pivotally supported at the other end; A fulcrum base that can maintain the position and change the protrusion distance below the bottom of the vacuum cleaner body of the front wheel, and the fulcrum base has an axis of tilting of the handle body with respect to the vacuum cleaner body on the surface that contacts the arm body. When the center of the rear wheel is located in front of the center of the rear wheel axis, the vacuum cleaner body is tilted forward and downward, and when the center of the rear wheel is located behind the center of the rear wheel axis, the vacuum cleaner body is tilted forward and upward. This upright type cleaner is characterized by having a convex surface shaped to maintain a substantially constant distance between the suction port of the cleaner body and the surface to be cleaned.

(e) Function When the handle body, which is perpendicular to the vacuum cleaner body, is tilted and the center of rotation of the handle body is moved rearward and closer to the center of rotation of the rear wheel, the surface of the vacuum cleaner body to be cleaned is Although the distance is increased, the other end of the arm moves below the fulcrum base, increasing the distance between the front wheel and the vacuum cleaner body, and the suction port remains almost parallel to the distance to the surface to be cleaned. .

Furthermore, if the handle body is tilted backwards and the center of rotation of the handle body is positioned further back than the center of rotation of the rear wheel, the distance of the rear part of the vacuum cleaner body to the surface to be cleaned will be smaller, but the distance of the arm body will be smaller. The vicinity of the other end is supported by the fulcrum base and rises, and the distance between the front wheels and the cleaner body becomes smaller, so that the suction port continues to remain substantially parallel to the distance to the surface to be cleaned.

(f) Embodiments This invention will be described in detail based on embodiments shown in FIGS. 1 to 8. However, this invention is not limited thereby.

As shown in FIG. 1, the upright cleaner C includes a vacuum cleaner main body 1 and a handle body 2 pivotably supported on the vacuum cleaner main body 1 so as to be tiltable. A suction port 8 is provided in the front portion of the vacuum cleaner body 1.

A rear wheel 3 is pivotally supported at the rear portion of the lower end of the handle body 2.

3 shows a state in which the handle body 2 is positioned perpendicularly to the vacuum cleaner body 1 (upright shape @). Reference numeral 5 denotes an arm body, one end of which is pivotally supported by the lower portion of the handle body 2, and the other end of which the front wheel 4 is pivotally supported. 7 is arm body 5
This is a fulcrum base that determines the distance from the vacuum cleaner main body l by pressing the vicinity of the other end from above. The shape of the engagement surface of the fulcrum base 7 that engages with the arm body 5 is such that it first gently descends forward and then rises forward again. The vicinity of the other end of the arm body 5 can smoothly engage and slide on the fulcrum base 7. The arm body 5 engages with the lowermost portion 7a of the fulcrum base when the handle body 2 is connected to the vacuum cleaner body! When tilting backwards, the center of tilting 11 of the handle body 2 is the center of rotation 1 of the rear wheel 3.
2 and the same position in the old and rear direction. That is, the fulcrum base 7 tilts the handle body 2 from the upright position, and the line connecting the rotation center 11 of the handle body 2 and the rotation center I2 of the rear wheel 3 is the floor surface 9, which is the surface to be cleaned. The handle body 2 is lowered forward until it is perpendicular to the handle body 2.
The engagement surface has a shape that rises forward when the center of rotation 11 of the handle body 2 is located behind the center of rotation 12 of the rear wheel 3 by tilting the handle body 2 . Therefore, since the vicinity of the other end of the arm body 5 slides along the engaging surface of the fulcrum base 7 having this shape, the center of rotation 4d of the front wheel 4 also slides along this shape, and the front wheel 4 and the vacuum cleaner body The distance to l changes.

4 and 5 show a state in which the handle body 2 is tilted from the upright type cleaner C shown in FIGS. 2 and 3. By tilting the handle body 2, the pivot point 6 of the handle body 2 and the arm body 5 moves forward, and therefore the arm body 5 is pushed forward. Near the other end of the arm body 5 is a fulcrum base 7
It slides into engagement with and moves forward and downward. As a result, the front wheels 4 also move forward and downward. Here, the vacuum cleaner itself! The distance between this and the lower end 41 of the front wheel 4 increases. However, at this time, the rear portion of the vacuum cleaner body 1 is at a higher position due to the rear wheels 3. Therefore, the vacuum cleaner itself! The suction port 8 opened at the tip portion of the suction port 8 maintains a substantially constant distance from the floor surface 9 and remains substantially parallel to the floor surface 9.

As the handle body 2 is further tilted, the rotation center 11 of the handle body 2 and the rotation center 12 of the rear wheel 3 become at the same position in the front-rear direction. At this time, the arm body 5 is engaged with the lowermost part 7a of the fulcrum base 7. FIG. 6 shows the main parts of the upright cleaner C at this time. At this time, the rear part of the cleaner body 1 is at the highest position by the rear wheels 3, while the front part of the cleaner body 1 is supported by the front wheels 4 at the highest position. Therefore, the opening 8 of the cleaner body 1 maintains a substantially constant distance from the floor surfaces 8 and 9 and remains substantially parallel to the floor surface 9.

7 and 8 show a state in which the handle body 2 is further tilted and positioned substantially parallel to the floor surface 9. As the tilting of the handle body 2 progresses further, the rotation center 11 of the handle 2 moves to the rear of the rotation center 12 of the rear wheel 3, and the height of the rear part of the cleaner body l becomes lower. As the handle body 2 tilts, the arm body 5
The pivot point 6 rotates forward, and the arm body 5 is pushed forward.

The other end of the pressed arm body 5 engages and slides on the fulcrum base 7, but since its engagement sliding surface rises forward, the height of the front wheel 4 rises. Due to this change in the height of the front wheel 4, the height of the front portion of the cleaner body l becomes lower. Therefore, the height of the suction port 8 relative to the floor surface 9 is kept substantially constant, and the suction port 8 is kept substantially parallel to the floor surface 9.

As described above, in the upright type cleaner C, even if the handle body 2 is tilted with respect to the cleaner body 1, the suction force 8 remains substantially parallel to the bottom surface 9 at a constant distance. Therefore,
Since the suction port 8 is maintained at a high cleaning efficiency with respect to the bottom surface 9, the upright cleaner C has a certain level of cleaning ability.

The sliding engagement between the arm body 5 and the fulcrum base 7 is achieved by attaching wheels to the arm body 5 and rails to the fulcrum base 7, respectively.
This is accomplished by providing a guide groove in the fulcrum base 7 and providing an engaging piece in the arm body that engages with the guide groove.

(g) Effects of the Invention This invention is configured such that the heights of the front and rear parts of the vacuum cleaner body relative to the floor surface change in a certain relationship when the handle body is tilted, so that the handle body can be tilted. An upright type that always maintains a constant cleaning ability for the surface to be cleaned by keeping the suction port at a constant distance from the floor regardless of the situation, and the suction port being almost parallel to the floor. It's a cleaner.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a configuration explanatory diagram including a partial cross section showing the handle body in an upright state in this embodiment, and Fig. 3 is the main part of Fig. 2. An enlarged view, FIG. 4 is a view corresponding to FIG. 2 when the handle body is tilted in this embodiment, FIG. 5 is a view corresponding to FIG. 3 at this time, and FIG. A diagram equivalent to Figure 3 when the front and back positions of the center and the center of rotation of the rear wheels are the same,
Figure 7 is a view corresponding to Figure 2 when the handle body is tilted almost parallel to the floor surface in this embodiment, Figure 8 is a view corresponding to Figures 3 and 3 at this time, and Figure 9 is a view corresponding to Figure 3 of the conventional example. Figure equivalent figure, 1st O
The figure is a diagram corresponding to FIG. 5 of the conventional example, and FIG. 11 is a diagram corresponding to FIG. 8 of the conventional example. C... Upright type cleaner, 1...
・Vacuum cleaner body, 2...Handle body, 3...
...Rear wheel, 4...Front wheel, 5...
...Arm body, 6...Pivot point, 7.
...Fullin base, 8...Suction port, 1
1... Center of rotation of the handle body, 12...
...The center of rotation of the rear wheel. Chiku 2 M

Claims (1)

[Claims] 1. A vacuum cleaner body having a suction port in the front part of the body;
A handle body is pivotally supported to be tiltable with respect to the main body of the vacuum cleaner, a rear wheel is pivotally supported at the rear of the lower end of the handle body, one end is pivotally supported on the handle body, the other end extends forward, and the other end is pivotally supported on the lower end of the handle body. An arm body on which the front wheel is pivotally supported, and a fulcrum that abuts near the other end of the arm body to maintain the position of the other end of the arm body and can change the protruding distance of the front wheel below the bottom of the vacuum cleaner body. When the center of the axis of the handle body's tilt relative to the vacuum cleaner body is located forward of the center of the axis of the rear wheel, the fulcrum base is placed on the surface that contacts the arm body, and when the center of the axis of tilting of the handle body with respect to the vacuum cleaner body is located forward of the center of the axis of the rear wheel, the The shape allows the vacuum cleaner body to tilt downward and when located behind the center of the rear wheel axis, tilts the vacuum cleaner body forward and upward, keeping the distance between the suction port of the vacuum cleaner body and the surface to be cleaned almost constant. An upright cleaner characterized by having a convex surface.