JP2001112674A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner which allows the smooth changeover of a belt from a drive pulley side to an idler side. SOLUTION: This vacuum cleaner has a belt switching arm 42 provided with a drive pulley sidewall 42a and idler sidewall 42b so as to hold the flat belt 34 in-between and moves the flat belt 34 to the drive pulley sidewall 42a and the idler sidewall 42b by the lateral movement of this belt switching arm 42 is disposed with the drive pulley sidewall 42a so as to exist nearer the end face of the flat belt 34 than the idler sidewall 42b of the belt switching arm 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner having a rotating brush.

[0002]

2. Description of the Related Art A conventional vacuum cleaner of this type generally has, for example, a structure as shown in FIGS. The details will be described below with reference to the drawings.

[0003] In the drawing, reference numeral 1 denotes a suction port having a rotary brush 2 for scraping dust built in the front. A main body 3, which is provided at the rear of the suction port 1 so as to be tiltable, is provided with a driving motor 6. The driving motor 6 drives a blower for sucking dust, and makes the rotating shaft 5 of the driving motor 6 protrude into the suction port 1. The rotation of the shaft 5 of the driving motor 6 is transmitted to the rotating brush 2 via the flat belt 4.

A driving pulley is provided at one end of the rotary brush 2.
And an idler 10 rotatably mounted on a rotating shaft 8 of the rotating brush 2 via a bearing 9. Numeral 11 denotes a bearing for holding the end of the rotary shaft 8, and 12 denotes a belt switching arm for moving the flat belt 4 to the drive pulley 7 and the idler 10, and a rotary portion 12e. Rotate left and right around. One end of the switching arm 12 (the rotating part 12
On the side opposite to e), a drive pulley side wall 12a and an idler side wall 12b which are raised substantially in parallel with the flat belt 4 are provided. ing. (See FIG. 6) A cam portion 12 protruding laterally is provided substantially at the center of the switching arm.
The arm operation plate 13 is provided on the upper surface of the suction port 1 substantially opposed to the cam portion 12d. The lower part of the arm operating plate 13 is pressed by a pressing plate 14 so as to be slidable in the front-back direction.
A cam receiving portion (groove portion) 13a with which the cam portion 12d contacts is provided on the lower surface of the arm operation plate 13, and the groove portion 13a is provided.
Is inclined so as to approach the center as it goes forward, so that when the operation plate 13 is moved forward, the cam 12d moves to the idler side along the groove.

[0005]

In the above configuration, when the flat belt 4 is on the drive pulley 7 side as shown in FIG. 5, the flat belt 4 is driven as shown in FIG. Poo
The belt tension T1 on the side toward the reel 7, that is, the side on which the belt switching arm 12 acts, is opposite to the belt, that is, the side on which the belt switching arm 12 does not act, due to the load of the rotating brush 2. Is significantly lower than the belt tension T2, so that the flat belt 4 is
When switching to the zero side, there is a problem that the flat belt 4 cannot be moved to the idler 10 unless the drive pulley side wall 12a is largely moved to the idler 10 side.

The shaft 5 on which the flat belt 4 of the driving motor 6 is applied generally has a driving motor in a direction in which the shaft 5 is pulled by the tension of the flat belt 4 and surrounding heat. The axis of 6 is shifted. That is, the degree of parallelism with the rotary brush 2 shifts as the shaft 5 approaches the rotary brush 2 (as indicated by the arrow Z in FIG. 5), so that the flat belt 4 gradually moves toward the center of the suction port 1 over time. Move and drive
There is a problem that the flat belt 4 is detached from the reel 7 or the idler 10 and that a part of the wall of the suction port 1 is cut off.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an easy-to-use vacuum cleaner capable of smoothly performing belt switching.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is configured such that a flat belt is closer to a drive pulley side wall than to an idler side wall of a belt switching arm. is there.

With this structure, the flat belt is driven by the driving pulley.
When switching from the side to the idler side, since the drive pulley side wall of the belt switching arm is close to the flat belt, the movement of the belt switching arm can be made smaller than that of the conventional configuration. You can do it.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION
When the flat belt is switched from the driving pulley side to the idler side by configuring the flat belt to be closer to the drive pulley side wall than the idler side wall of the belt switching tool, the belt The movement can be made smaller than that of the conventional structure, and therefore, the usability and durability can be improved by reducing the load on the mechanism for operating the belt switching device.

According to a second aspect of the present invention, a motor is provided.
The rotating shaft and rotating brush are arranged in parallel, and the drive pulley is arranged closer to the center than the idler, so that the position of the flat belt is located at the center of the suction port of the vacuum cleaner due to aging, etc. If the flat belt slightly shifts, the flat belt slightly contacts the belt, and contacts the drive pulley side wall of the belt switching arm, so that the shift of the flat belt can be stopped at that time. In order to prevent the belt from being worn against the drive pulley or a part of the suction port, the durability of the vacuum cleaner is improved.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 4, reference numeral 31 denotes a suction port having a rotary brush 32 built therein for scraping up dust, and a main body 33 is attached to the rear of the suction port 31 in a tiltable manner as shown in FIG. . A driving motor 36 is provided below the main body 33.
Is arranged. The driving motor 36 drives a blower (not shown) for sucking dust, and makes the rotating shaft 35 project laterally behind the suction port 31. A hole (not shown) through which the shaft 35 penetrates is provided in the rear side wall of the suction port 31, and the main body 33 tilts about the shaft 35. The rotating brush 32 transmits the rotation of the shaft 35 via the flat belt 34.

A drive pulley 37 is fixed to one end of the rotary brush 32 and is rotatably mounted via a bearing 39 to a rotary shaft 38 provided at one end of the rotary brush 32. An idler 40 is provided and a drive
The reel 37 and the idler 40 are adjacent to each other. Reference numeral 41 denotes a bearing for holding the end of the rotary shaft 38, and reference numeral 42 denotes the flat belt 34 for driving the drive pulley 37 and the idler.
This is a belt switching arm for moving the arm 40 to a center portion 40, and is configured to rotate around a rotation portion 42e at one end. A drive pulley side wall 42a is provided on the drive pulley 37 side substantially in parallel with the flat belt 34 on the other end side (the counter-rotating portion 42e side) of the switching arm 42, and an idler is provided on the idler 40 side. − Side wall 42
b, and the flat belt 34 is moved from the idler side wall 42b to the drive pulley side wall 42.
It is set to be close to a.

Further, a detachment prevention plate 42c is provided at an end of the drive pulley side wall 42a so as to be parallel to the surface of the flat belt 34.

An arm operation plate slidable in the front-rear direction is provided on the upper surface of the suction port 31 substantially opposed to the cam portion 42d at a substantially central portion of the switching arm 42. 43 are arranged. The lower part of the arm operating plate 43 is pressed by a pressing plate 44 so that it can slide in the front-rear direction. Further, a cam receiving portion (groove) 43a with which the cam portion 42d contacts is provided on the lower surface of the arm operation plate 43, and the groove 43a is inclined so as to approach the central portion as it goes forward, When the cam 43 is moved forward, the cam 42d moves to the idler side along the groove.

With the above configuration, when the flat belt 34 is in the drive pulley 37 as shown in FIG. 1, the belt tension of the flat belt 34 where the belt switching arm 42 is located is significantly reduced. Therefore, in order to move the flat belt 34 toward the idler 40 from this state, it is necessary to move the conventional belt switching arm 42 largely toward the idler 40. Since the pulley side wall 42a is in the immediate vicinity of the flat belt 34,
The moving amount may be minimized, so that the load on the cam bearing 43a can be minimized, and the usability of the arm operation plate 43 and the durability of the entire mechanism can be improved. Things.

As shown in FIG. 4, when the flat belt 34 is in the idler 40, the rotating brush 32 does not rotate, so that the tension of the flat belt 34 is significantly different from the above case. The belt tension at the side where the switching arm 42 is present is slightly reduced, so that the movement to the drive pulley 37 side from this state requires only a small movement. In general, the shaft 35 is gradually rotated by the tension of the flat belt 34 and the secular change such as slight deformation of the holding portion of the drive motor 36 of the main body 33 due to heat generation of the drive motor 36 and the like. 32 (in the direction of the arrow Z in FIG. 1), the shaft 35 gradually becomes oblique with respect to the rotation axis of the rotating brush 32, so that the flat belt 34 gradually moves toward the center of the suction port 31, When the flat belt 34 is on the idler 40 side, the end surface of the drive pulley 37 is provided. When the flat belt 34 is on the drive pulley 37, the end of the rotary brush 32 and the wall of the suction port 31 are provided. However, in the case of this embodiment, since the drive pulley side wall 42a is in the immediate vicinity of the flat belt 34, the flat belt 34 is slightly shifted to the center side of the suction port 31. ,
In order to prevent the position from being further shifted, the durability of the entire mechanism is improved.

[0019]

According to the present invention, the flat belt is constructed such that the drive pulley side wall of the belt switching arm is closer to the rotary brush driving flat belt than the idler side wall. When switching from the drive pulley side to the idler side, the movement of the belt switching arm can be made smaller than that of the conventional configuration, and the usability and durability can be improved.

[Brief description of the drawings]

FIG. 1 is a bottom view of an essential part of an upright type vacuum cleaner according to an embodiment of the present invention with a back plate of a suction opening removed.

FIG. 2 is a sectional view taken along line BB of FIG. 1;

FIG. 3 is an external perspective view of the same.

FIG. 4 is a bottom view of a main part of the suction port with a back plate removed.

FIG. 5 is a bottom view of a main part of an upright type vacuum cleaner showing a conventional example, with a back plate of a suction opening removed.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a diagram illustrating the tension of a flat belt.

[Explanation of symbols]

 31 suction port 32 rotating brush 34 flat belt 35 shaft 36 drive motor 37 drive pulley 40 idler 42 belt switching arm 42a drive pulley side wall 42b idler side wall

Claims (2)

[Claims] A rotary brush facing the suction port, a motor for rotating the rotary brush, a flat belt for transmitting the rotation of the motor, and a drive brush coupled to the rotary brush. And an idler provided adjacent to the drive pulley for separating the transmission from the flat belt from the rotary brush, and for moving the flat belt to the drive pulley or idler. A belt switching member provided with an idler side wall and a driving pulley side wall so as to sandwich the flat belt, wherein the belt switching member is disposed between the motor and the driving pulley. Wherein the flat belt is disposed on a part of the flat belt moving toward the drive pulley, and the flat belt is closer to the drive pulley side wall than the idler side wall. An electric vacuum cleaner with a belt switching device. 2. The vacuum cleaner according to claim 1, wherein the rotating shaft of the motor and the rotating brush are arranged in parallel, and the driving pulley is arranged more centrally than the idler.