JPH06189880A - Suction implement for vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide a suction implement having a rotor of the vacuum cleaner which is excellent in safety, satisfactory in handleability, and miniature and inexpensive. CONSTITUTION:A lever 10 for switching an actuator 9 of a changeover switch 17 for controlling a rotation of a motor 7 is provided, the lever 10 is operated linking with the progress of forward movement and backward movement of a suction implement main body 5 so that rotation control of the motor 7 is executed, and when the suction implement main body 5 is raised in the air, the lever 10 is energized with one piece of spring 19 so as to be positioned at almost middle point of an operating range of the lever 10, therefore, the lever 10 is controlled to stop in the middle without fail irrespective of the precision of the spring 19. In this case, a position of OFF is provided in the changeover switch 17 so that the rotation of the motor 7 stops.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, the suction tool of this type of vacuum cleaner is
For example, there is a configuration as disclosed in Japanese Patent Laid-Open No. 63-197422. The configuration will be described with reference to FIGS. A suction tool body 5 having an upper case 1 and a lower case 2 and a suction port 4 formed on a lower surface 3, a rotor 6 provided with a gear portion provided at the suction port 4, and a gear unit A motor 7 for driving the rotor 6 is provided, a changeover switch 8 for changing the rotation direction of the motor 7 is provided, and a lever 10 for changing over an actuator 9 of the changeover switch 8 is provided in a lower case. 2 is provided so as to project from the lower surface 3 of the suction lever body 5, and the lever 10 is interlocked with the forward movement and the backward movement of the suction tool body 5.
Is operated to switch the rotation direction of the motor 7.

However, in such a conventional structure, when a telephone or the like is called during cleaning, if the suction tool body 5 is inadvertently left as it is, the rotor 6 remains rotated. If a child accidentally raises the suction tool body 5 from the floor and touches the rotor 6, it is very dangerous and may cause serious injury. Further, since the lever 10 for switching the rotation direction of the motor 7 is provided so as to project from the lower surface 3 of the lower case 2, if a child mistakenly switches the lever 10, the danger is doubled or tripled. However, there was a safety issue that it would swell.

Therefore, as shown in FIGS. 9 and 10, the suction tool of the electric vacuum cleaner having excellent safety has been improved and improved.

For example, an upper case 1 and a lower case 2
And a suction tool body 5 having a suction port 4 formed on the lower surface 3.
And a rotor 6 having a gear portion provided at the suction port 4 and a motor 7 for driving the rotor 6 through the gear portion, and a changeover switch for switching the rotation direction of the motor 7. 17
The lever 10 for switching the actuator 9 of the changeover switch 17 is provided so as to project from the lower surface 3 of the lower case 2 so that the lever 10 is interlocked with the forward movement and the backward movement of the suction tool body 5. By operating, the rotation direction of the motor 7 is switched, and when the suction tool body 5 is lifted in the air, the lever 10 is positioned approximately in the middle of the range operated when the lever 10 is moved forward and backward. Energize with springs 19 and 20, etc., at this time
The changeover switch 17 is provided with an OFF position so that the rotation of the motor 7 is stopped.

[0006]

In the conventional structure as described above, when the suction tool body 5 is lifted in the air, the lever 10 is urged so as to be positioned substantially in the middle of the range in which it moves forward and backward. Two springs 19 and 20 are required, and in order to position them in the middle, the spring constant and effective length of the springs 19 and 20 must be improved. It is necessary to control the accuracy of the spring constant, the effective length, etc. for maintaining the predetermined spring pressure and the variation of the spring pressure. Moreover, since two springs, namely the springs 19 and 20, are used, the storage space for the springs becomes large, which hinders the downsizing of the suction tool. Further, it takes a lot of man-hours to assemble two springs, and the parts cost is also high. The present invention solves the above-mentioned problems, and eliminates malfunction of the lever 10 (not located in the middle in the air) due to spring variation as one spring, and can reduce assembly man-hours and component cost by half, which is small and safe. It is possible to provide a good and inexpensive suction device for an electric vacuum cleaner.

[0007]

In order to achieve the above object, the present invention provides a suction tool body formed of an upper case and a lower case having a suction port formed on the lower surface, and a suction tool body provided on the suction port. A motor for driving the rotor and an actuator that slides in the front-back direction, the actuator controls the rotation of the motor at the front and rear, and a changeover switch for opening the power supply to the motor at an intermediate position; and the lower portion. A case is provided with a motion detection piece that operates according to the movement of the suction tool body on one side of a rotation center portion that is rotatably supported, and a spring body is stored on the other side of the rotation center portion. And a rotating body provided with a spring accommodating portion attached to the actuator, and both ends of the spring are slightly compressed by a pair of side walls integrally provided in the spring accommodating body. Opening provided in Through, said pair of projecting portions provided in the lower case, the spring, in which can provide for an electric vacuum cleaner suction tool, characterized in that substantially in contact with the both ends.

[0008]

When the suction tool body is lifted in the air as in the above-mentioned means, it is urged by one spring or the like so as to be positioned at approximately the middle of the range operated when the lever is moved forward and backward. At this time, since the changeover switch is provided with an OFF position so that the rotation of the motor is stopped, when the telephone or the like is called during the cleaning, the suction tool body is inadvertently opened. If left untouched, the rotor will continue to rotate, but if a child mistakenly raises the suction tool body from the floor, the rotor will automatically stop and should the rotor be touched. It's safe.

Therefore, it is an object of the present invention to provide a suction tool for a vacuum cleaner which is more convenient to use.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the means of the present invention will be described below with reference to FIGS. Reference numeral 11 is a cleaner body having an electric blower and a dust collecting portion (not shown) built therein, and 5 is a suction tool body, which communicates with the cleaner body 11 via an extension pipe 12 and a hose 13. 14 is a power cord, which is a hose 1
The main body of the cleaner 11
And the suction tool body 5 are electrically coupled.

The suction tool body 5 is composed of an upper case 1 and a lower case 2, and a suction port 4 is formed on a lower surface 3. A rotor 6 provided with a gear portion 15 provided at the suction port 4,
A motor 7 for driving the rotor 6 through the belt 16 via the gear portion 15 is provided. A changeover switch 17 for controlling the rotation of the motor 7 is provided.
A sliding body 18 is fitted to the actuator 9 of No. 7. The sliding body 18 is provided with a spring 19, and when the actuator 9 is slid back and forth, the spring 19 is formed into the rib 2.
Since it is compressed by Nos. 1 and 22, the actuator 9 comes to be located in the middle of the front and rear operation ranges. Reference numeral 23 is a round bar-shaped pin, which is vertically slidably inserted in a hole 24 formed in the sliding body 18. When the suction tool body 5 is turned upside down, the pin 23 falls into the hole 24 formed in the cover 25. Hole 24
And the holes 26, respectively, and the actuator 9 cannot slide back and forth. Reference numeral 10 denotes a lever, which is rotatably provided with a shaft 27 as a fulcrum. The lever 10 is also rotatably fitted to a cylindrical portion 28 of the sliding body 18 fitted to the actuator 9 to move the lever 10 back and forth. When the actuator 9 is operated to, the actuator 9 operates backward and forward. Also, the lever
Reference numeral 10 is provided so as to project from the lower surface 3 of the lower case 2, and when the suction tool body 5 is moved forward and backward with respect to a cleaning surface such as a carpet, the lever 10 is moved as shown in FIG. 1 due to contact resistance with the carpet. It works like a chain line.

In such a structure, when the suction tool body 5 is not operated in the air or on the cleaning surface, the actuator is actuated.
Since the switch 9 and the lever 10 are located in the middle of the front and rear operating ranges, the terminal 29 of the changeover switch 17 is in the OFF position where no electrical connection is made, as shown in FIG. -Ta-7 does not rotate. Next, when the suction tool body 5 is moved forward on the cleaning surface, the lever 10 pivots backward and the actuator 9 moves forward, and as shown in FIG. 6, through the terminal 29 of the changeover switch 17. It is connected to the motor 7 and the rotor 6 is rotated. Further, when the suction tool body 5 is moved backward, it operates in the opposite manner to the above, and as shown in FIG. 7, it is connected to the motor 7 via the terminal 29 of the changeover switch 17 and the rotor 6 rotates.

Next, the portion that comes into contact with the cleaning surface of the lever 10 is formed of an elastic body such as rubber, and comes into contact with the floor surface when the suction tool body 5 of this elastic body is moved backward. A plurality of conical or mountain-shaped protrusions 31 are provided on the surface side 30. This is because, depending on the type of rug, when pushing the suction tool body 5 forward, especially in the case of a long-haired rug, the pushing force is also applied to the suction tool body 5 in the direction of pressing the suction tool body 5 against the floor surface. Since it acts, the lever 10 has sufficient resistance and the operability of the lever 10 is good, but when the suction tool body 5 is moved backward, the pulling force at hand is a force in the direction of floating the suction tool body 5 from the floor surface. Next Lever-10
There were times when it was difficult to operate, but since it is configured with multiple cone-shaped or mountain-shaped protrusions 31, the protrusions 31 are caught on the rugged feet of the rug, and the operation of the lever 10 operates reliably. is there.

The operation and action of this embodiment will be described. When the suction tool main body 5 is lifted in the air, the changeover switch 17 is in the OFF position, so that when a call etc. is received during cleaning,
Even if you inadvertently leave the suction tool body 5 as it is,
When a child accidentally touches the suction tool body 5 and raises it from the floor, the rotor 6 automatically stops and the rotor 6
It is safe to touch.

Even when the child turns the inside of the suction tool body 5 so that the suction port 4 faces upward, the changeover switch 17 is mechanically locked by the action of the pin 23 at the OFF position. Therefore, even if a child mistakenly tries to switch the lever 10, it does not operate, so that the rotor 6 does not rotate and it is safe, and a double safety structure is provided.

[0016]

As described above, according to the present invention, when the suction tool body is lifted in the air, only one spring is required to control the lever so that the selector switch is in the OFF position and the lever is stopped in the middle. Therefore, even if the system management of the spring is simple, the lever can be reliably stopped in the middle, and it has excellent safety, and since there is only one spring, the number of assembly steps and parts costs can be reduced by half, and the spring can be installed internally. Since the space is small, it is safe for small children, the lever operates reliably, and it is possible to provide a more convenient, inexpensive, small-sized suction device for a vacuum cleaner having excellent safety.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a suction tool of an electric vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is an external perspective view of the electric vacuum cleaner.

FIG. 3 is a plan sectional view of a suction tool of the electric vacuum cleaner.

FIG. 4 is an exploded perspective view of a changeover switch portion of a suction tool of the vacuum cleaner.

FIG. 5 is a circuit diagram when the suction tool of the vacuum cleaner is moved forward.

FIG. 6 is a circuit diagram when the suction tool of the vacuum cleaner is moved backward.

FIG. 7 is a circuit diagram when the suction tool of the electric vacuum cleaner is lifted in the air.

FIG. 8 is a vertical sectional view of a suction tool of an electric vacuum cleaner showing a conventional example.

FIG. 9 is a circuit diagram when the suction tool of the electric vacuum cleaner is lifted in the air.

FIG. 10 is an exploded perspective view of a changeover switch section of a suction tool of the electric vacuum cleaner.

[Explanation of symbols]

 1 Upper Case 2 Lower Case 3 Lower Surface 4 Suction Port 5 Suction Tool Body 6 Rotor 7 Motor 8 Switch 9 Actuator 10 Lever 11 Vacuum Cleaner Body 12 Extension Pipe 13 Hose 14 Power Cord 15 Gear Part 16 Belt 17 Changeover switch 18 Sliding body 19 Spring 20 Spring 21 Rib 22 Rib 23 Pin 24 Hole 25 Cover 26 Hole 27 Shaft 28 Cylindrical part 29 Terminal 30 Surface side 31 Protrusion

Claims (1)

[Claims] 1. A suction tool body formed of an upper case and a lower case having a suction port formed on a lower surface thereof, a motor for driving a rotor provided at the suction port, and an actuator which slides in a front-back direction. An actuator that controls the rotation of the motor at the front and rear and opens a power supply to the motor at an intermediate position; and a rotation center part that is rotatably supported by the lower case. A movement detecting piece that operates according to the movement of the suction tool body is provided on one side, and a spring accommodating portion that accommodates one spring body and is attached to the actuator is provided on the other side of the rotation center portion. Both ends of the spring are held in a slightly compressed state by a pair of side walls integrally provided in the spring accommodating body, and further provided in the lower case through the openings provided in the side walls. A pair of protrusions Wherein, the spring, for an electric vacuum cleaner suction tool, characterized in that substantially in contact with the both ends.