JPH05317225A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide the vacuum cleaner which can execute simply turn-on/turn- off of a power source, power control of a motor-driven air blower, and switching of a power brush by controlling a lever with one hand. CONSTITUTION:The vacuum cleaner is provided with an operating part 11 consisting of a lever whose one end is attached axially to a handy pipe 8 so as to be freely rotatable and which is always energized counterclockwise by a spring 19, a power source switch 33 which consists of a variable resistor and whose operating control 34 is connected to the other end of the lever 30, and a changeover switch 35 of a power brush operated by the lever 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly to an operating portion provided on a hand pipe.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing an example of a conventional vacuum cleaner. In the figure, reference numeral 1 is a cleaner body having a built-in electric blower, a dust collecting chamber, etc., 2 is its front wheel, 3 is a pair of main wheels, 4 is an axle of the main wheel 3, and 5 is an upper handle.
Reference numeral 6 denotes a hand pipe 8 having a joint portion 7 with the cleaner body 1 at one end and an operation portion 11 such as a hand switch at the other end.
Is a hose provided with, and 9 is an extension pipe connected to the hand pipe 8, and 10 is a suction portion that incorporates a power brush or the like attached to the tip of the extension pipe 9. F is the floor surface.

FIG. 4 is a sectional view showing the details of the hand pipe 8. Reference numeral 11 denotes an operating portion, and vertical walls 12 are provided upright on both edges of the hand pipe 8 so as to face each other, and ribs 13a to 13f are integrally provided between the vertical walls 12. A substantially triangular hollow portion 14 is formed by the ribs 13a and 13b penetrating both vertical walls 12. Reference numeral 15 is a power switch composed of a micro switch attached to the vertical wall 12, and its terminal is connected to the power circuit by a conductor (not shown) arranged along the hand pipe 8 and the hose 6.

Reference numeral 17 denotes a lever disposed in the hollow portion 14, one end of which is rotatably fixed to the vertical wall 12 and has a rib 13f.
It is constantly urged in the direction of arrow a (counterclockwise) by a spring 19 interposed between and, and the other end abuts against the rib 13a to prevent its rotation. Reference numeral 18 denotes a protrusion provided on the lever 17, the tip of which is the contact spring 1 of the power switch 15.
6 is abutted, and is constantly urged by the contact spring 16 in the direction of arrow a.

Reference numeral 20 denotes a power controller which is mounted on the rib 13d and is composed of, for example, a variable resistor.
Is connected to the power supply circuit via the, and is connected to the sillade plate 21 arranged in the window hole provided in the cover 23, and the slide plate 21 is slid along the window hole, so that the cleaner body 1 Controls the power of the electric blower built into the.
Reference numeral 22 denotes a power brush changeover switch which is attached to the rib 13c and is connected to the power circuit of the power brush drive motor provided in the suction portion 10. The knob 22a is slidable from the window hole provided in the cover 23. It is protruding.

Next, the operation of the electric vacuum cleaner provided with the operation section 11 as described above will be described. First, the power cord is inserted into the power source, the joint portion 7 of the hose 6 is connected to the cleaner body 1, and the extension pipe 9 to which the suction portion 10 is connected is connected to the hand pipe 8. In this state, the user operates the operation unit 1
1 is grasped and the lever 17 is rotated forward (in the direction of arrow b). As a result, the protrusion 18 provided on the lever 17 presses the contact spring 16 of the power switch 15 and
Is turned on and the electric blower is energized. Therefore, if the suction unit 10 is moved along the floor surface F, dust on the floor surface can be sucked and cleaned.

When it is desired to change the power of the electric blower depending on the place to be cleaned or the like, the power is adjusted by sliding the slide plate 21 with the other hand while keeping the power switch 15 in the ON state. When cleaning the carpet or the like, similarly, with the power switch 15 in the ON state, the other hand is used to operate the knob 22a of the changeover switch 22 to energize and rotate the power brush. In the above description, the case where the slide plate 21 or the changeover switch 22 is operated with the power switch 15 turned on is shown, but these may be operated after the power switch 15 is turned off.

[0008]

In the conventional vacuum cleaner as described above, since the power switch 15, the power controller 20, and the power brush changeover switch 22 are independently provided in the operation portion 11, Power switch 15 O
In both the N state and the OFF state, both hands must be used to operate the power controller 20 or the changeover switch 22, which is extremely inconvenient.

The present invention has been made to solve the above-mentioned problems, and simply operates a lever with one hand to easily turn on / off a power supply, control a power of an electric blower, and switch a power brush. The purpose is to obtain a convenient and easy-to-use vacuum cleaner.

[0010]

SUMMARY OF THE INVENTION An electric vacuum cleaner according to the present invention comprises an operating knob composed of a lever, which is rotatably attached to a vertical wall at one end thereof and is constantly biased counterclockwise by a spring, and a variable resistor. A power switch connected to the other end of the lever,
It is provided with an operating section including a power brush changeover switch operated by a lever.

[0011]

[Function] When the lever is lightly gripped, the operating knob of the power switch connected to the lever slides toward the lower resistance value, and the blower motor is energized to start suction. Then, the power of the electric blower can be controlled by the gripping degree of the lever. At this time, the changeover switch of the power brush is in the OFF state.

When cleaning the carpet or the like, if the lever is gripped more strongly, the operating knob slides to the side having the lowest resistance value, and the power of the electric blower reaches the maximum. At this time, the changeover switch is driven by the lever and turned on to rotate the power brush. When the lever is released, the lever is urged by the spring to move away from the changeover switch, and the operating knob of the power switch is slid to the side having the highest resistance value. As a result, the power switch is turned off and the electric blower is stopped.

[0013]

【Example】

Example 1. FIG. 1 is a sectional view of an essential part of the first embodiment of the present invention. The same parts as those in the conventional example of FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 30 is a hollow portion 14.
One end of the lever is rotatably attached to the vertical wall 12 and is constantly urged in the direction of arrow a (counterclockwise) by a spring 19 interposed between the lever 13 and the rib 13f. 31
Is a protrusion provided on the lever 30, and 32 is an engaging portion provided on the other end of the lever 30.

Reference numeral 33 is a power switch which is attached to the rib 13d and is composed of a sliding variable resistor connected to a power circuit. The operation knob 34 is engaged with the engaging portion 32 of the lever 30. The power switch 33 is configured such that the resistance value increases when the operation knob 34 is slid in the direction of arrow a, and the resistance value decreases when the operation knob 34 is slid in the direction of arrow b. Reference numeral 35 denotes a power brush changeover switch composed of a micro switch, which is attached to the vertical wall 12, and its contact spring 36 and the projection 31 of the lever 30 are not in contact with each other at all times (when not in use).

Next, the operation of the present invention configured as described above will be described. When the vacuum cleaner is not in use, the lever 30 is biased by the spring 19 and is in the state shown in the drawing, and the power switch 3
The operation knob 34 of No. 3 is located at the left end of the figure, and thus at the position where the resistance of the variable resistor is highest. The protrusion 31 of the lever 30 is separated from the contact spring 36 of the changeover switch 35. Even if the power cord is connected to the power source in this state, the power switch 33 does not supply power to the electric blower because it has the maximum resistance value, and therefore the electric blower does not operate.

Then, when the lever 30 is lightly gripped, the lever 30 rotates about its axis and slides the operating knob 34 engaged with the engaging portion 32 in the direction of arrow b, that is, in the direction of low resistance. As a result, power is supplied to the electric blower, and the electric blower is driven to suck dust and the like from the suction port. In this case, the power of the electric blower can be appropriately adjusted by slightly or strongly gripping the lever 30 and changing the resistance value of the power switch 33. At this time, the protrusion 31 of the lever 30 is close to or slightly in contact with the contact spring 36 of the changeover switch 35, and the changeover switch 35 is in the OFF state.

When cleaning the carpet or the like, the lever 30 is gripped more strongly. This allows the power switch 3
The knob 34 of 3 reaches the position where the resistance value is the lowest, and a large amount of power is supplied to the electric blower to reach the maximum power. On the other hand, the contact spring 36 of the changeover switch 35 is pushed and displaced by the protrusion 31 (the position indicated by the alternate long and short dash line in the figure), and the changeover switch 3
5 turns on. As a result, power is supplied to the drive motor of the power brush, and the power motor is rotated to scrape out dust and the like that have settled in the carpet and suck it.

When the cleaning of the carpet or the like is finished, the switch 30 is turned off when the lever 30 is gently grasped again, and the electric blower continues to operate to suck dust and the like.
In addition, when the lever 30 is released, the lever 30 moves to the spring 1
It is urged by 9 to rotate in the direction of arrow a, and the power switch 33
The operation knob 34 of is slid to the left end in the figure. This allows
Since the resistance value of the variable resistor is maximized, even if the power source is connected, the electric blower is not supplied with power and stops. In addition,
In the present embodiment, by appropriately setting the length of the protrusion 31 provided on the lever 30, it is possible to adjust the operation start timing of the power motor with respect to the power of the electric blower.

Example 2. FIG. 2 is a sectional view of the essential parts of the second embodiment of the present invention. Reference numeral 35a is a power brush changeover switch. In the present embodiment, a so-called push type micro switch is used which is turned on when the contact spring 36 is pushed and turned off when the contact spring 36 is pushed further. A push button 37 is slidably mounted on the lever 30 and is always in contact with the contact spring 36 of the microswitch 35a and is biased in the direction of arrow a. In addition, 30 a is a connecting portion of the engaging portion 32.

In this embodiment as described above, the lever 3
When 0 is held, the power switch 3 is turned on as in the case of the first embodiment.
The resistance value of 3 becomes low, and the electric blower is energized to operate. On the other hand, the contact spring 36 of the changeover switch 35a is turned on when the push button 37 is pushed, and the drive motor of the power brush is energized to rotate it. Therefore, when cleaning carpets, etc., it suffices to do so in that state.
When cleaning the floor or the like, the push button 37 may be released to turn off the changeover switch 35a to stop the power brush.

As is clear from the above description, according to the present invention, the following operation can be performed by operating the operating portion with one hand. (1) The rotation (power) of the electric blower can be controlled from OFF to the maximum in accordance with the movement (grip) of the lever 30. (2) The rotation of the power brush can be controlled according to the movement of the lever 30.

(3) By adjusting the length of the protrusion 31 provided on the lever 30, the power brush can be started by designating the power (rotation speed) of the electric blower. (4) The push button 37 provided on the lever 30 turns on and off the micro switch for the power brush changeover switch.
If it is set to F, the rotation of the power brush can be controlled regardless of the rotation of the electric blower.

[0023]

As described in detail above, according to the present invention, the power supply circuit is turned on and off by gripping the lever provided on the operation portion.
F and electric blower control, power brush drive circuit O
Since N and OFF are controlled, it is possible to obtain a convenient electric vacuum cleaner that can be operated with one hand.

Further, the structure is simple and the assembling work is easy, and the slide plate of the power controller and the changeover switch of the power brush, which have been conventionally required, can be omitted. The cost can be reduced.

Further, since the cover does not need a sliding window of a slide plate or a sliding window of an operation knob of a changeover switch as in the prior art, the operating portion can be sealed and dust and the like can be prevented from entering. Further, since these sliding windows are not provided, a hand pipe excellent in design can be realized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of a first embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 3 is a side view of a conventional vacuum cleaner.

FIG. 4 is a cross-sectional view of a main part of FIG.

[Explanation of symbols]

 1 Vacuum cleaner body 6 Hose 8 Hand pipe 9 Extension pipe 10 Suction part 11 Operation part 12 Vertical wall 14 Hollow part 19 Spring 30 Lever 31 Protrusion 32 Engagement part 33 Power switch 34 Operation knob 35 Changeover switch 36 Contact spring 37 Push button

Claims (1)

[Claims] 1. A vacuum cleaner main body equipped with a dust collection chamber, an electric blower, etc., a hose equipped with a hand pipe having one end connected to the vacuum cleaner main body and an operating portion at the other end, a power brush, etc. In an electric vacuum cleaner including a suction portion and the like connected to the hose via an extension pipe, one end of which is rotatably supported by the hand pipe and which is constantly biased counterclockwise by a spring, and a variable resistor. An electric vacuum cleaner comprising: an operating section including a power switch having an operating knob connected to the other end of the lever, and a power brush changeover switch operated by the lever.