JPH0246829Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an upright cleaner in which an operating handle is rotatably provided on a cleaner body having a rotating brush at the suction port.

(B) Prior art In the conventional technology filed by the applicant of the present invention in Utility Model Application No. 109165/1984, a rotating brush is attached to the rear of the cleaner body having a rotating brush at the suction port, and the rotating brush is connected to the axle of the rear wheel via an arm member. A movably pivoted operating handle is provided, and a wheel lever is provided that moves the front wheel in and out in conjunction with the operating handle.

However, this type of prior art has the disadvantage that the arm member wears out at the connection portion with the wheel lever.

(c) Problems to be solved by the invention The present invention solves the above-mentioned drawbacks and prevents wear of the arm member with a simple structure.

(d) Means for solving the problem The present invention provides an operation handle rotatably supported on the axle of the rear wheel via an arm member at the rear of the cleaner body having a rotating brush at the suction port.
A wheel lever is provided for moving the front wheel in and out in conjunction with rotation of the operating handle, wherein a recess is formed in one side of the arm member, a reinforcing plate is engaged with the recess, and the wheel lever is , which is pivotally supported on the arm member together with the reinforcing plate by a caulking pin.

(E) Effect According to the present invention, the arm member is reinforced at the connection portion with the wheel lever, thereby preventing its wear.

(f) Examples Examples of the present invention shown in the drawings will be described below.

Reference numeral 1 denotes a cleaner body, which is composed of an upper case 2 and a lower case 3 made of synthetic resin, and a bottom plate 5 with a horizontally elongated suction port 4, and inside is a blower 6 driven by an electric motor (not shown). and a rotating brush 9 connected to the rotating shaft 7 of the electric motor via a belt 8. Reference numeral 10 denotes a pair of rear wheels 11 provided at the lower rear of the cleaner main body 1;
11 is attached to the axle, and a rod-shaped operating handle 14 having a grip portion 13 at the tip is rotatably attached to the axle via a bifurcated arm member 12. 15
is a breathable dust collection bag, and the bag opening 16 is detachably connected to an exhaust port 18 through an exhaust passage 17 containing a blower 6 formed in the main body 1, and the end is connected via a coil spring 19. It is locked to the lower end of the grip portion 13 of the rod-shaped operating handle 14.

20, 20 are a pair of front wheels located between the intake port 4 and the rear wheel 11, and the axle 21 is connected to the arm member 12 by a pair of left and right wheel levers 22, 22.
The front wheels 20, 20 are moved back and forth in conjunction with changes in the rotation angle of the operating handle 14.

Reference numerals 23 and 23 denote left and right cam plates provided integrally with the lower case 3. The cam plates form a low step portion 24 and a high step portion 25 that come into contact with the axles 21 of the front wheels 20 and 20. By rotation, the front wheel 20,
20 to adjust the distance between the floor surface and the suction port 4.

Reference numeral 26 denotes a spring that always urges the axle 21 of the front wheel 20 upward, and is composed of a coil portion 27 and a straight portion 28.The upper end is locked to a locking pin 29 provided on the cleaner body 1, and the lower end is locked to a locking pin 29 provided on the cleaner body 1. The straight portion 28 is inserted through a slit-like insertion hole 30 provided in the lower case 3 and is locked to the axle 21 of the front wheel 20. The insertion hole 30 functions as a stopper for the coil portion 27 of the spring 26.

In the above configuration, when the operating handle 14 is set approximately vertically as shown in FIG. 1 for temporary suspension, the axle 21 of the front wheels 20, 20
23, the front part of the cleaner body 1 rises and the rotating brush 9 is separated from the floor surface. Therefore, even if the rotating brush 9 rotates at the same location on the floor surface, it will not damage the carpet surface.

Further, during normal use with the operation handle 14 tilted, the arm member 12 is attached to the rear wheel 1 as shown in FIG.
When rotating around the axles 10 of the front wheels 20, 11, the wheel levers 22, 22 whose rotation centers are located at different positions from the arm member 12 move rearward, and with this movement, the axles 21 of the front wheels 20, 20 move toward the cam plate. 23, 23 are abutted and locked to the low step portions 24 of 23. At this time, the height of the low step part 24 is set so that the suction port 4 is in an optimal suction state with respect to the floor surface, and the height of the front wheels 20, 24 is
is set at a position that helps reduce the mobility of the cleaner body 1.

Reference numerals 31 and 31 are reinforcing plates attached to the bifurcated portions of the arm member 12, respectively, as shown in FIGS. 5 and 6.
As shown in the figure, it is engaged with a recess 32 formed on the inner surface of the arm member 12. Further, the wheel lever 22 is attached to the outer surface of the arm member 12. 33 is a caulking pin, arm member 1
2. By inserting the reinforcing plate 31 and the wheel lever 22, the wheel lever 22 is rotatably supported on the arm member 12. Since the arm member 12 is exposed from the cleaner body 1 and visible to the user, it is die-cast aluminum to improve its appearance, but is susceptible to wear due to its material. The reinforcing plate 31 is attached to the arm member 12 in order to prevent wear of the shaft support hole of the caulking pin 33 and the like. Further, the reinforcing plate 31 is easily installed using only 331 caulking pins that also serve as pivot pins for the wheel lever 22, and in the installed state, it is locked in the recess 32 of the arm member and is prevented from rotating relative to the arm member 12. There is. Further, since the reinforcing plate 31 is also fitted into the axle 10, the mounting structure of the reinforcing plate 31 is strengthened, and the arm member 12, which is easily worn, is reinforced in the support hole of the axle 10.

(g) Effects of the invention Since the invention is constructed as described above, the arm member is reinforced at the connection part with the wheel lever to prevent its wear, and therefore the arm member can be made of an aesthetic material such as aluminum die-casting. Can be formed. Further, the reinforcing plate for preventing wear does not require any special parts for its attachment, and can be easily and firmly attached to the arm member by also serving as a caulking pin for pivoting the wheel lever.

Further, when the reinforcing plate is fitted into the axle, the mounting structure of the reinforcing plate can be further strengthened.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention,
Fig. 1 is an external side view, Fig. 2 is a partially sectional side view of Fig. 1, Fig. 3 is a partially sectional side view during use, Fig. 4 is a slope view of the front wheel retraction mechanism, 5 is an enlarged side view of the main part, and FIG. 6 is a sectional view taken along the line A--A in FIG. 5. 1...Cleaner body, 4...Suction port, 9...
Rotating brush, 10...Axle, 11...Rear wheel, 1
2...Arm member, 14...Operation handle, 20
...Front wheel, 22...Wheel lever, 31...
Reinforcement plate, 32... recess, 33... caulking pin.

Claims (1)

[Claims for Utility Model Registration] 1. An operation handle rotatably supported on the axle of the rear wheel via an arm member is provided at the rear of the cleaner body having a rotating brush at the suction port, and the operation handle can be rotated. In the wheel lever that makes the front wheel move in and out in conjunction with the operation, a recess is formed in one side of the arm member, a reinforcing plate is engaged with the recess, and the wheel lever is connected to a caulking pin together with the reinforcing plate. An upright cleaner characterized in that the upright cleaner is pivotally supported on the arm member by. 2. The upright cleaner according to claim 1, wherein the reinforcing plate is fitted onto the axle.