JPH0739501A - Cord winding device of vacuum cleaner - Google Patents

Abstract

PURPOSE:To improve safety by preventing the cord in winding from jumping on the floor to cause a user to be injured. CONSTITUTION:A cord reel guide 35 interlocked with a driving part 37 of an electromagnetic actuator 36 is set on an exit part 34 to draw out a cord 28 from a cleaner main body 20, to make the cord 28 slide on or be in non-contact with the cord reel guide 35 at a fixed time interval to make the cord winding speed not to exceed a fixed speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord winding device for an electric vacuum cleaner used in general households.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner of this type is shown in FIG.
The configuration shown in FIG. 15 has been generally used.

That is, the motor fan 1 and the cord reel 2
A motor chamber 3 with a built-in motor and a dust collection chamber 4 in front of it
The cord reel 2 includes a cord 6 and a spring spring 7, a brake 8, a cord reel button 9, and a cord reel shaft 10 which are drive sources of the cord reel 2.
It is composed by. The cord reel button 9 is fixed to the cord reel 2 and the partition wall 12 while being blocked by the spring 11.

With the above structure, when the cord 6 is pulled out, the spiral spring 7 is wound and the cylindrical brake 8 is sandwiched between the cord reel 2 and the partition wall 12, and the cord reel 2 is fixed. The brake 8 is interlocked with the cord reel button 9 and is fixed by the spring 11.

When the user finishes cleaning, the brake 8 held between the cord reel 2 and the partition wall 12 is released by pressing the cord reel button 9, and the wound spring 7 is returned to the original position. The cord 6 was wound around the cord reel shaft 10 with a force to rotate and the cord 6 was wound.

[0006]

In such a conventional structure, when the cord is wound, the cord reel is rotated vigorously, so that the cord is wound up at a very high speed and the cord is not in contact with the floor surface. There was a risk of bouncing between them, resulting in injury to the user.

The present invention is to solve the above problems. When the cord is wound after using the cleaner, the speed of the cord reel is reduced by a speed reducer provided on the main body or a cord stopper provided on the cord. The vacuum cleaner has a higher safety by reducing the speed at which the vacuum cleaner is caught.

[0008]

In order to achieve the above object, the present invention provides a main body case including a motor chamber containing a motor fan and a cord reel, and a dust collection chamber in front of the motor fan, and the main body. An outlet for the cord forming the cord reel is formed at the rear of the case, and a flexible material such as rubber is arranged at the outlet so as to slide with the cord at a certain time interval or to be in non-contact with the cord. The speed reducer is provided with a shroud portion made of a conductive material.

Further, a plurality of cord stoppers are provided on the cord constituting the cord reel, and the cord stopper has a maximum central portion and is substantially conical toward both ends, and the cord stopper has a large friction coefficient. It is composed of a material and a small material, and has a large friction coefficient on the main body side.

Further, a lip-shaped cord guide made of a flexible material such as rubber is provided at the outlet of the cord formed at the rear of the main body case, and the cord guide is slidable on its side surface. The cord guide is formed of a material having a large coefficient of friction on the outside of the main body and a material having a very small coefficient of friction on the opposite side.

Further, a reduction gear having a sliding portion made of a flexible material capable of sliding contact with a cord wound on a cord reel by a spring is provided in the main body case.

Further, an outlet for the cord constituting the cord reel is formed at the rear of the main body case, and a rotation detecting device for detecting the number of rotations of the cord reel, and a sliding contact with the cord when positioned at the outlet. A speed reducer provided with a cushion portion made of a flexible material such as rubber is arranged so that the speed reducer is electrically linked with the rotation detecting device.

[0013]

With the above structure, when the cord is caught,
A speed reducer provided on the cord reel or a cord stopper provided on the cord can reduce the rotation speed of the cord reel and reduce the speed at which the cord is wound, so that the speed at which the cord is wound becomes faster than necessary. It is possible to improve the safety when the cord is caught.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described with reference to FIG.

Reference numeral 20 denotes a motor chamber 23 containing a motor fan 21 and a cord reel 22, and a dust collecting chamber 24 in front of the motor chamber 23.
The cord reel 22 is fixed to the partition wall 25 by a main body provided with. The cord reel 22 includes a cord reel shaft 26, a cord 28 having a plug 27, a power spring 29, a cord reel brake 30, a brake lever 32 having a cord reel button 31, and a spring covering the brake lever 32. It is composed of 33.

The body 20 at the rear of the cord reel 22
An outlet portion 34 for pulling out the cord 28 is formed in the cord, and a cord reel guide 35 is provided in the outlet portion 34 in a vertical direction so as to face the cord 28. Further, the cord reel guide 35 is an electromagnetic actuator 36.
Is interlocked with the driving unit 37 of. Further, the electromagnetic actuator 36 is electrically connected to the cord reel button 31 (not shown) and is vertically driven for a certain period of time.

Next, the operation of the structure of this embodiment will be described. When the cord 28 is pulled out when using a vacuum cleaner, the mainspring 29 is wound, the cylindrical cord reel brake 30 is sandwiched between the cord reel 22 and the partition wall 25, and the cord reel 22 does not rotate. Is fixed as. A brake lever 32 that works together with the cord reel brake 30 is blocked by a spring 33.

When the cord reel button 31 is pushed when the cleaning is finished, the brake lever 31 is pushed,
The brake 30 interlocking with the brake lever 31 is the partition wall 25.
The cord 28 is pulled out from between the cord reel 22, and the cord 28 is swung by the force of returning to the original position of the main spring 29, and the cord 28 is wound.

At this time, when the cord reel 22 starts to rotate, the mainspring spring 29 is wound most, so that the rotation speed becomes the highest and the cord 28 is wound up vigorously.

At this time, the electromagnetic actuator 36 electrically connected to the cord reel button 31 moves up and down for a certain period of time. Therefore, the cord reel guide 35 provided in the drive portion 37 of the electromagnetic actuator 36 sandwiches the cord 28 at a certain time interval. As a result, when the cord 28 is sandwiched, the frictional resistance between the surface of the cord 28 and the cord reel guide 35. Thus, the speed at which the cord 28 is caught is reduced. Further, when the cord guide 35 moves upward, the speed at which the cord 28 is wound is increased. By repeating this operation, the speed at which the cord 28 is wound is reduced.

Therefore, according to this embodiment, since the cord 28 can be wound at a certain speed or less, the cord 28 does not bounce from the floor surface and hit the user, resulting in injury, and the safety is remarkably improved. It can be improved.

Next, a second embodiment of the present invention will be described. In the embodiments of FIGS. 6 to 7, a plurality of cord stoppers 38 are provided on the outer periphery of the cord 28, and the cord stopper 38 has a substantially conical shape with the outermost diameter at the center and the diameters at both ends becoming smaller. Further, the plug 27 side (A portion) of the cord stopper 38 is made of a material having a small friction coefficient, and the opposite side (B portion) is made of a material having a large friction coefficient. Here, the outermost diameter dimension of the cord stopper 38 is larger than the dimension between the cord guides 35.

Next, the operation of the structure of this embodiment will be described. When using a vacuum cleaner, the A portion of the cord stopper 38 contacts the cord guide 35 when the cord 28 is pulled out, but since the friction coefficient of the A portion is very small, it can be pulled out with a small force. Further, when the cord 28 is wound after cleaning is completed, when the cord reel button 31 is pressed, the cord reel brake 30 is disengaged and the power of the spring spring 29 tends to wind the cord 28, but the cord stopper 38 causes friction. When the portion B formed of a material having a large coefficient makes contact with the cord guide 35 and slides, the speed at which the cord 28 is wound is reduced. Since a plurality of cord stoppers 38 are provided, the speed is gradually reduced and the cord is caught.

Next, a third embodiment of the present invention will be described. 8 to 9, a lip 39 made of an elastic and flexible material is provided at the outlet portion 34 provided in the main body 20, and the inside of the lip 39 is made of a material having a very small friction coefficient (A portion). The opposite side is made of a material having a relatively large coefficient of friction (B portion). The cord 28 is sized so that it can always contact and slide with the lip 39.

Next, the operation of the structure of this embodiment will be described. When using the vacuum cleaner, when pulling out the cord 28, as shown by the solid line in FIG.
Since the A portion of 9 slides on the cord 28, the cord can be pulled out with a light force. When the cord 28 is wound after cleaning is completed, the cord reel button 31 is pressed to release the cord reel brake 30 and the force of the spring spring 29 tends to wind the cord 28, but this time as indicated by the broken line. Since the portion B of the lip 39 having a large coefficient of friction contacts and slides with the cord 28, the brake is applied and the speed at which the cord 28 is pulled in decreases.

Next, a fourth embodiment of the present invention will be described. In FIG. 10, a speed reducer 42 having a sliding portion 41 with a large friction coefficient, which is covered by a spring 40, is provided inside the main body 20 facing the cord 28 wound around the cord reel 22.

Next, the operation of the structure of this embodiment will be described. When the cord 28 is rolled up after cleaning is completed, the cord reel button 31 is pushed, the cord reel brake 30 is released, and the force of the spring 29 causes the cord 2 to move vigorously.
8 is about to be caught, but as the cord 28 is caught, the dimension A in FIG. 10 gradually increases. Therefore, since the sliding portion 41 made of a flexible material which is in contact with the cord 28 is pressed against the cord 28 by the spring 40, its force gradually increases and the rotational force of the cord reel 22 decreases, Result code 2
The speed at which 8 is caught is decreasing.

Next, a fifth embodiment of the present invention will be described. 11 to 12, an outlet 34 for pulling out the cord 28 is formed in the main body 20 at the rear portion of the cord reel 22, and a cord reel guide 35 is vertically arranged facing the cord 28 at the outlet 34. It is provided.
Further, the cord reel guide 35 is interlocked with the drive portion 37 of the electromagnetic actuator 36. The electromagnetic actuator 36 is connected to a rotation detector 43 and an electromagnetic switch 44 provided on the outer circumference of the cord reel.

Next, the operation of the structure of this embodiment will be described. When the cord 28 is rolled up after cleaning is completed, the cord reel button 31 is pushed, the cord reel brake 30 is released, and the force of the spring 29 causes the cord 2 to move vigorously.
8, the rotation detector 43 detects the number of rotations of the cord reel 22 at this time, and when the number of rotations is three, for example (when the cord reel is pre-wound about 5 times), the electromagnetic switch 44 is wound. Works electromagnetic actuator 3
6 to drive the cord guide 3 provided in the drive unit 37
5 pinches the cord 28 and reduces the speed at which the cord 28 is wound.

[0030]

As described above, according to the present invention, the winding speed of the cord can be reduced, so that the cord can be wound at a certain speed or less, and the cord bounces off the floor surface and hits the user, resulting in injury. However, it is possible to improve safety.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cord lead-out portion according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view of the electric vacuum cleaner according to the embodiment.

FIG. 3 is a side sectional view of the cord reel in the embodiment.

FIG. 4 is a sectional view of a cord reel according to the same embodiment.

FIG. 5 is a rear perspective view of the electric vacuum cleaner according to the embodiment.

FIG. 6 is a cross-sectional view of a cord lead-out portion according to a second embodiment of the present invention.

FIG. 7 is a rear perspective view of the electric vacuum cleaner according to the embodiment.

FIG. 8 is a cross-sectional view of a cord pull-out portion according to a third embodiment of the present invention.

FIG. 9 is a rear perspective view of the vacuum cleaner according to the embodiment.

FIG. 10 is a sectional view of a cord reel according to a fourth embodiment of the present invention.

FIG. 11 is a cross-sectional view of a cord pull-out portion according to a fifth embodiment of the present invention.

FIG. 12 is a sectional view of a cord reel according to the same embodiment.

FIG. 13 is a plan sectional view of a vacuum cleaner showing a conventional example.

FIG. 14 is a plan sectional view of a cord reel showing a conventional example.

FIG. 15 is a side sectional view of a cord reel showing a conventional example.

[Explanation of symbols]

 20 Main body 22 Code reel 28 Code 30 Code reel brake 34 Exit part 35 Code guide 36 Electromagnetic actuator 38 Code stopper 39 Lip 41 Sliding part 42 Speed reducer 43 Rotation detector 44 Electromagnetic switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhisa Morishita 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. An outlet for a cord constituting the cord reel is formed at the rear of a main body case constituted by a motor chamber containing a motor fan and a cord reel, and a dust collection chamber in front of the motor fan, and the outlet is provided. Is a cord winder for an electric vacuum cleaner provided with a speed reducer having a sliding portion formed of a flexible material such as rubber which comes into contact with and separates from the cord at certain intervals. 2. A cord constituting a cord reel is provided with a plurality of cord stoppers, wherein the cord stopper has a maximum central portion and is substantially conical toward both ends, and the cord stopper is made of a material having a large friction coefficient and small. A cord winder for a vacuum cleaner that is made of a material and has a material with a large friction coefficient on the main body side. 3. A lip-shaped cord guide made of a flexible material such as rubber is provided at the outlet of the cord formed at the rear of the main body case, and the cord guide allows the cord to slide on its side surface. The cord guide of the electric vacuum cleaner according to claim 1, wherein the cord guide is formed of a material having a large friction coefficient on the outside of the main body and a material having a small friction coefficient on the opposite side. 4. A cord winder for an electric vacuum cleaner in which a reduction gear having a sliding portion made of a flexible material capable of sliding contact with a cord wound on a cord reel by a spring in the main body case is provided in the main body case. apparatus. 5. A rotation detector for detecting the number of rotations of the cord reel by forming an outlet for the cord constituting the cord reel in the rear of the main body case, and a sliding detector that is located at the outlet and can slide in contact with the cord. And a speed reducer provided with a cushion portion made of a flexible material such as rubber, which is electrically connected to a rotation detecting device.