JPS627246Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to prevent damage to the belt when the rotating brush is locked, and to take immediate action when an abnormality is discovered from the outside, regarding a vacuum cleaner equipped with a rotating brush and a belt. shall be.

Conventional vacuum cleaners of this type have a rotating brush that rotates via a belt in order to efficiently scrape out and clean dust deeply attached to the carpet surface. This rotating brush then hits the carpet surface at high speed to remove dust. However, if long-haired carpet gets caught in the rotating brush, the rotating brush will lock up. However, electric blowers generally require large inputs because they require suction as well as transmission of rotation to the rotating brush.
Even if the rotating brush locks, the rotational speed will only drop a little and it will continue to rotate. This had the disadvantage that the belt would burn out in a few seconds due to the frictional heat of the electric blower. Furthermore, since it is not obvious from the outside that the rotating brush is locked, it is not possible to take immediate action such as turning off the power, which leads to belt damage, which is a major drawback.

In order to solve the above-mentioned problems, this invention has a vertically sliding roller that is rotatably attached to the lower end of the belt that can come in contact with the belt that is passed between the electric blower that sucks in dust and the rotating brush that scrapes up dust. A lever is provided, a grip is provided at the upper end of the lever, and a collar is provided below the grip, and when the collar of the lever is engaged, a roller of the lever applies tension to the belt from below. A leaf spring having a locking portion that holds the roller in a position where the rotating brush is locked is provided, and when the rotating brush is locked and a higher tension is applied to the belt to press the roller, the locking portion of the leaf spring causes the The lever is configured to release the hold on the collar of the lever and move the lever downward, thereby releasing the tension applied to the belt by the roller, and when the grip of the lever is pulled up, the collar of the lever is released from the spring. The lever is configured to be held again by engaging with the locking part of the plate, and when the rotating brush is locked, the tension on the belt can be released, and the abnormality can be corrected by the downward movement of the grip part of the lever. It can be detected and dealt with promptly.

An embodiment of the present invention will be described below based on the drawings. 1 is a main body, 2 is a rotary brush with a beater provided in the front part of the main body 1 in the main body 1, and 3 is a dust collection part provided tiltably in the rear part of the main body 1; An electric blower 4 for sucking dust is installed, and a dust bag 5 for collecting dust is installed above it.
have. Further, a shaft 4a protrudes from one end of the electric blower 4, and a belt 6 is connected between the shaft 4a and the pulley portion of the rotating brush 2. A hose 7 is connected from the rear of the rotating brush 2 to the rear upper part of the dust collecting section 3, and is designed to guide dust into the dust collecting bag 5. 8 is a handle for operation, 9 is a handle,
10 is a back plate of the main body 1, and 11 is a wheel for movement.

When cleaning with the vacuum cleaner, the dust stirred up by the rotating brush 2 is removed by the electric blower 4.
The suction force causes the air to pass through the hose 7 and be collected in the dust bag 5, and only clean air is discharged to the outside from an exhaust port provided at the bottom of the dust collection section 3.

Next, the main parts of the present invention will be explained. A rotatable roller 12 is positioned so as to come into contact with the bottom surface of the belt 6. 13 is a vertically slidable lever provided so as to pass through the upper end of the main body 1;
The rotatable roller 12 is attached to its lower end. 13a is a tapered flange provided below the upper end of lever 13; 13b is lever 1;
This is the grip part formed at the upper end of 3. 14 is a leaf spring having a locking tapered portion 14a near its upper end with which the tapered collar portion 13a of the lever 13 can engage;
Its lower end is fixed within a circular rib 1a at the upper end of the main body 1.

During normal use, the lever 13 is in the position shown in FIG.
a is engaged with a locking tapered portion 14a of a leaf spring 14, and the lever 13 is locked and held by the leaf spring 14, and the bottom surface of the belt 6 is pushed upward by the roller 12 at the lower end of the lever 13, and the belt Rotation is transmitted to the rotating brush 2 by applying tension to the rotating brush 6.

By the way, when the rotating brush 2 bites into the long-pile carpet and locks the rotating brush 2, a certain amount of tension is applied to the belt 6, which presses the roller 12 of the lever 13 downward, causing the tapered brim of the lever 13 to The portion 13a pushes and expands the locking tapered portion 14a of the leaf spring 14 against the holding force of the leaf spring 14,
The lever 13 has a lever gripping portion 13b formed by a leaf spring 1.
It descends to the position shown in Fig. 2, where it is locked to the tip of 4. As a result, the pressing force exerted on the belt 6 by the roller 12 at the lower end of the lever 13 is released, and the tension of the belt 6 is rapidly reduced, so that even if the rotating brush 2 is locked, the belt 6 may be damaged or the electric blower may be damaged. You can prevent it from burning out. Further, since the grip portion 13b of the lever 13 is lowered from the position shown in FIG. 1 to the position shown in FIG. 2, it is immediately known that the rotating brush 2 is locked, and measures such as turning off the power can be taken. Thereafter, the lever 13 is pulled up by holding the grip portion 13b, and the tapered collar portion 13a is held again by the locking tapered portion 14a of the leaf spring 14, and is set to the state for use.

As described above, according to the present invention, the tension on the belt is released when the rotating brush is locked, and the abnormality can be detected from the outside, so it is possible to prevent damage to the belt and prevent the electric blower from burning out. Moreover, it has a great practical effect in that measures such as turning off the power immediately can be taken.

[Brief explanation of the drawing]

The drawings show an example of an embodiment of the present invention, and FIG. 1 is a cutaway side view of the main parts of the vacuum cleaner as a whole, and FIG. 2 is a cutaway side view of the main parts showing the operating state. 1...Main body, 2...Rotating brush, 4...Electric blower, 4a...Shaft, 6...Belt, 12...Roller, 13...Lever, 13a...Tapered collar, 13b...Grip part , 14... leaf spring, 14
a...Tapered part.

Claims (1)

[Scope of utility model registration request] said lever has a grip portion at its upper end and a flange portion below said grip portion, and a leaf spring having a locking portion for holding said lever in a position where the roller can apply tension to said belt from below when the flange portion of said lever engages with said lever, said leaf spring releasing the locking portion of said lever's flange from the locking portion of said leaf spring to move said lever downward and releasing the tension applied to the belt by said roller, and after said rotating brush is unlocked, when the grip portion of said lever is pulled up, the flange portion of said lever engages with the locking portion of said spring plate to hold said lever again.