JPS5921719Y2 - vacuum cleaner - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vacuum cleaner equipped with a rotating brush.

In this type of blower, a rotating brush is connected via a belt to an electric blower that generates negative pressure, but the belt has a short lifespan because it is constantly under tension even when not in use.

This invention was developed in view of the above-mentioned points, and the purpose is to provide a vacuum cleaner that can extend the life of the belt.

An embodiment of this invention will be explained based on the drawings.

Reference numeral 1 denotes a main body case in which a suction port 2 that opens toward the floor is formed in a lower part of the main body, and a rotating brush 3, a dust collector 4 with a built-in filter (not shown), and an electric blower are installed in this case. 5 is provided.

Further, a gear 7, which is a rotational drive unit, is fitted and fixed to the output shaft 6 of the electric blower 5.

A rotation transmitting section 8 having an axis parallel to the gear 7 is held by an actuating body 10 that rotates about a fixed shaft 9 as a fulcrum.

The rotation transmitting section 8 includes a spindle 11 rotatably held by an actuating body 10, and a pulley 13 and a gear 14, which are connected to the rotary brush 3 by a belt 12.

These pulleys 13 and gears 14, together with a cooling fan 15, are fitted and fixed to the support shaft 11.

As shown in FIG. 2, this cooling fan 15 is fixed to a boss 18 having a flange 16 and fins 17 that prevent the belt 12 from falling off.

Further, an air intake hole 19 facing the cooling fan 15 is formed in the side wall of the main body case 1 .

Next, as shown in FIG. 1, an electromagnet 20 as a belt tensioning body is provided, one end of the plunger 21 is connected to the free end of the actuating body 10, and the other end is connected to the motor switch 2.
It faces the contact point of 2.

Next, the electric circuit is shown in FIG.

The power plug 23 includes a power switch 24 and the electromagnet 2.
0 and the safety switch 25, and a series circuit between the electric blower 5 and the motor switch 22 are connected in parallel.

The safety switch 25 is provided in a safety device 26 provided between the dust collecting section 4 and a part of the main body case 1, as shown in FIG.

That is, as shown in FIG. 4, a holding part 27 that holds the safety switch 25 is screwed to a part of the main body case 1, and a knock pin 28 that presses the contact of the safety switch 25 is attached to this holding part 27. It is provided so as to be slidable while being biased in the return direction by a spring 29.

One end of this knock pin 28 is pressed by a pressing portion 4a formed in the dust collecting portion 4 to turn on the safety switch 25.

Alternatively, as shown in FIG. 5, the holding part 27 is provided with a knock pin 30 that returns to the OFF direction by the contact pressure of the safety switch 25, and the dust collecting part 4 is provided with a connecting part 4b that is connected to the holding part 27 with a screw 31. , when connecting the dowel pin 3
0 is pushed by the screw 31, turning on the contact of the safety switch 25.
A safety device 32 that pushes in the direction may also be used.

Therefore, unless the dust collector 4 is installed, the safety switch 2
5 is not turned on to prevent dust from passing around the electric blower 5 without being captured by the filter.

Next, as shown in FIG. 1, a handle 33 extending upward is provided at the rear of the main body case 1, and a power cord 35 is wound around this handle 33 and a grip 34 fixed to the handle 33. Hooks 36, 37 are formed.

Further, the handle 33 is provided with a cord holder 38 that holds the end of the power cord 35 near the power plug 23.

That is, as shown in FIG. 6, the cord holder 38 is secured to the hole in the pipe-shaped handle 33 and has a locking portion 39 that elastically protrudes and holds the power cord 35 elastically. It has a hook 40 that

The one shown in FIG. 7 is a modified example of the cord holder 41, in which a C-shaped fixing part 42 that is elastically fitted to the handle 33 and a hook 43 that elastically holds the power cord 35 are made of soft chloride. It is integrally molded from an elastic material such as vinyl.

In such a configuration, when the power switch 24 is turned on, the electromagnet 20 is energized and the plunger 21 moves to the right.

As a result, the actuating body 10 applies tension to the belt 12 while moving the rotation transmitting section 8 and causing the gear 14 to mesh with the gear 6.

On the other hand, the sliding of the plunger 21 turns on the motor switch 22, causing the electric blower 5 to rotate.

As a result, the rotary brush 3 rotates and knocks out dust adhering to a carpet or the like, and the dust is sucked in from the suction port 2 by negative pressure and collected in the dust collecting section 4.

When the power switch 24 is turned off, the electromagnet 20 is de-energized, the plunger 21 returns to the left, the motor switch 22 is turned OFF, the electric blower 5 stops, and the operating body 10 moves to the left together with the rotation transmitting unit 8. Move towards belt 1
Loosen 2.

That is, since the belt 12 becomes slack when not in use, fatigue of the belt 12 is reduced.

Moreover, since the belt 12 is cooled by the cooling fan 15 and the fins 17 during use, deterioration due to heat is also prevented.

Therefore, the life of the belt 12 can be extended.

In addition, after use, the power cord 35 can be wrapped around the hooks 36 and 37, but the tip of the power cord 35 can be wrapped around the cord holder 38 without having to do the troublesome operation of fixing it with a band or the like.
Or it is held with one touch by 41.

Note that the operating body 10 may be operated manually.

Since this invention is configured as described above, when driving the electric blower by the operation of the operating body, the rotation transmission section can be connected to the rotation drive section of the electric blower to drive the rotating brush, and the electric blower can be driven. When the belt is stopped, the rotation transmission section can be separated from the rotation drive section by the operation of the actuating body to loosen the belt, which has the effect of reducing fatigue of the belt and extending its life.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a longitudinal side view, Fig. 2 is an enlarged longitudinal sectional rear view of the rotation transmission section, Fig. 3 is an electrical circuit diagram, and Fig. 4 is a longitudinal sectional side view. FIG. 5 is an enlarged longitudinal side view of the safety device, FIG. 5 is an enlarged longitudinal side view of a modification of the safety device, FIG. 6 is an enlarged plan view of the cord holder, and FIG. It is a top view which expanded and showed the modification of a cord holder. 1...Body case, 2...Suction port, 3
...Rotating brush, 4...Dust collection section, 5.
...Electric blower, 7...Gear (rotation drive part), 8...Rotation transmission part, 10...Operating body, 12... belt.

Claims (1)

[Scope of utility model registration request] A rotating brush located at the suction port, a dust collecting section, and an electric blower are provided in a main body case having a suction port opening to the floor surface, and are detachably connected to a rotational drive section of the electric blower via a belt. a rotation transmitting portion for transmitting rotation to the rotating brush, and an actuating body for rotatably holding the rotation transmitting portion and deflecting the rotation transmitting portion in a direction in which the belt is loosened when the electric blower is stopped. , a vacuum cleaner characterized in that the electric blower is provided with a belt tensioning body that tensions the belt and deflects the operating body so as to connect the rotation transmission section and the rotation drive section when the electric blower is driven. .