JPS5830045B2 - Denki Soujiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner equipped with a self-winding cord reel.

Conventionally, in a vacuum cleaner, a cord reel around which a power cord is wound and main wheels for running the vacuum cleaner are separately attached to a main body case.

Therefore, both require a shaft support mechanism, which complicates the structure and increases the number of assembly steps.

Moreover, since the electric blower and other parts are installed in a fairly intensive manner inside the main body case, the installation of the cord reel and main wheels was done with considerable strain on the design, and in some cases, It is difficult to obtain sufficient strength and durability.

The present invention has been made in view of these points, and an object of the present invention is to obtain a vacuum cleaner whose structure can be extremely simplified.

The present invention provides a cord reel that winds and holds a power cord inside a main body case, is biased in the winding direction and supported by a shaft, and main wheels are attached to both ends of this shaft, and the main wheels are mounted on the floor. The cord reel is connected to the main wheel so that it can rotate freely in the cord pulling direction and can be stopped by the main wheel in the cord winding direction when the main body case is stopped after being joined. It is something.

Therefore, the cord reel and the main wheel are mounted on a common shaft, which simplifies the structure of the mounting part, and the main wheel, which stops by joining to the floor, is the same as the cord reel. Since it also performs a braking action, there is no need to provide a braking mechanism on the cord reel side when pulling out the power cord, thereby making the structure even simpler and extremely easy to assemble.

An embodiment of the present invention will be described based on the drawings.

First, reference numeral 1 denotes a main body case divided into left and right halves, and a dust collection case 2 is detachably attached to the front part of this main body case 1, and a suction port 3 is formed at the tip of this dust collection case 2. Auxiliary wheels 4 are also attached to the lower part.

A recess 5 is formed at the rear of the main body case 1, support walls 6 facing each other in parallel are formed in the recess 5, and a bearing 7 is formed in the center of these support walls 6.

Next, a cord reel 8 is provided inside the main body case 1.

This cord reel 8 has a cord storage section 10 with a flange 9 formed on its outer periphery, and a power cord 11 is wound and held around the cord storage section 10.

Further, a mainspring spring 12 is provided inside, and one end of the mainspring spring 12 is fixed to the cord reel 8, and the other end is fixed to a fixed part.

A cylindrical portion 13 that protrudes laterally is integrally formed in the center of the cord reel 8, and both ends of the cylindrical portion 13 have slopes 14 in one direction, and a stepped portion 15 is formed by the other force. Clutch teeth 16 that serve as a clutch are formed.

Further, a shaft 17 that protrudes from the support wall 6 of the main body case 1 is inserted into the cylindrical portion 13, and the cord reel 8 and the shaft 17 are integrated by a key 18.

Next, the cylinder part 19 is fitted to the shaft 16 and the bearing part 1 by an external force of the main body case 1, and the main wheel 20 is attached so as to be rotatable and slidable in the axial direction.

These main wheels 20 have a ring part 21 connected to the cylindrical part 19, and a ring-shaped sliding projection 22 is formed on the outer peripheral surface of this ring part 21.

Further, the inner end surface of the cylindrical portion 19 is formed with clutch teeth 25 that serve as a clutch having a slope 23 and a stepped portion 24 that engage with the clutch teeth 16, and the outer end portion of the cylindrical portion 19 is formed with the sliding protrusion. It is stopped by a washer 26 which has some elasticity and is joined to 22.

An elastic body 27 made of rubber or the like is provided on the outside of this washer 26.
is provided, and this elastic body 27 is held by screws 28.

A cap 29 is attached to the outer peripheral surface of the main wheel 20.

Note that 30 is a handle.

In such a configuration, the main wheels 20 rotate in the traveling direction when the main body case 1 is advanced.

The cord reel 8, in which the power cord 11 is fully wound and does not rotate in the winding direction, is connected to the slope 14 of the cord reel 8, which is engaged by the clutch teeth 16 and 25.
, 23 are connected, the main wheel 20 is connected to the elastic body 2.
7 and rotates while moving outward in the axial direction.

Also, when the main body case 1 is stopped and the power cord 11 is pulled out, the relative movement is the same, and the power cord 11
When the cord reel 8 is pulled out, a winding force is applied to the cord reel 8 by the mainspring spring 12, and the stepped portions 15 and 24 are brought into contact and locked by the main wheel 20 which is stopped by the floor surface.

Note that the winding force by the mainspring spring 12 can rotate the cord reel 8 to wind up the power cord 11 when the main wheels 20 are in a free state, but when the main wheels 20 are attached to the floor, the power There is not enough force to move the main body case 1 while winding the cord 11.

Therefore, when winding up the power cord 11, by grasping the handle 20 of the main body case 1 and slightly raising the main body case 1, the main wheel 20 will float off the floor and become free. 8 and the main wheel 20 rotate in the same direction to wind up the power cord 11.

Furthermore, when the main body case 1 is advanced with the power cord 11 pulled out, the cord reel 8 also rotates in the winding direction to wind up the power cord 11, but at this time, the power cord 11 is pulled out by hand as required.

Note that the clutch mechanism is not limited to the one shown in the drawings, and any mechanism may be used as long as the relative movement between the cord reel 8 and the main wheel 20 is free in one direction and locked in the other direction.

Since the present invention is constructed as described above, the main wheels can be freely rotated in the direction of travel even if the cord reel does not rotate when the main body case is running, and the power cord can also be freely pulled out. Once the power cord is pulled out, the main wheels that come into contact with the floor act as a brake to keep the cord reel in place.This eliminates the need for a special brake mechanism, and also allows the main wheels to be placed on the floor. Since the braking action is released by floating the power cord, it is easy to retract the power cord.Especially, since the cord reel and main wheel are attached to a single shaft, assembly is easy. It has the following effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a vertical front view, and FIG. 3 is a developed view of the clutch portion. 1... Body case, 8... Cord reel, 11... Power cord, 17... Shaft, 20... Main wheel.

Claims (1)

[Claims] 1. A cord reel that winds and holds the power cord is installed inside the main body case and supported by a shaft while being biased in the winding direction, main wheels are attached to both ends of this shaft, and the main wheels are joined to the floor surface. A vacuum cleaner characterized in that the cord reel is connected to the main wheel so that it can rotate freely in the cord pulling direction and can be stopped by the main wheel in the cord winding direction when the main body case is stopped. .