JP2751096B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to an improvement in an operation unit thereof.

[0002]

2. Description of the Related Art FIG. 10 is a side view of a conventional vacuum cleaner, and FIG. 11 is a side sectional view of an operation unit thereof. In these figures, 1 is a vacuum cleaner body having a dust collection chamber and an electric blower (both not shown) inside, 2 is a floor brush, 3 is a hose, 4 is an operation unit, 5 is a pipe, and 6 is an operation. A touch switch provided on the part 4, a gripping lever 7, a spring 8, a fixed contact 9, a movable contact 10, and a switching ring 11 are provided.

[0003] As shown in the figure, the touch switch 6 is disposed on the back side of the operation unit 4. When the grip lever 7 of the touch switch 6 is gripped, the movable contact 1 of the touch switch 6 is moved.
0 contacts the fixed contact 9 and the switch of the
N, the cleaner body 1 starts. Hand hold lever 7
When it is released, the touch switch 6 is turned off, and the electric blower of the cleaner body 1 stops. That is, since the electric blower is automatically stopped when the hand is released, the touch switch 6 is an effective device in terms of power saving. Further, when the switching ring 11 is rotated, the grip lever 7 is held in a state when it is gripped by a hand, that is, the movable contact 10 remains in contact with the fixed contact 9, and continuous operation becomes possible.

[0004]

Since the conventional vacuum cleaner is configured as described above, during use of the vacuum cleaner, the user can perform other tasks, for example, when a telephone rings or a visitor. Cleaning may be interrupted, and the vacuum cleaner may be left in place for a while. At this time, as shown in FIG. 12, when the operation unit 4 is placed on the base 12 or the like, the touch switch 6 touches the base 12 and turns ON, the motor of the cleaner body 1 starts, and an unexpected accident occurs. May cause.

[0005] Further, the suction air is moving at a considerable speed inside the operation unit 4, and particularly in the dry season in winter, static electricity is easily generated, dust easily adheres to the operation unit 4, and Since the suction air passes through the inside, it is difficult to reduce the diameter of the suction air due to the pressure loss, and there is a problem that the operation unit 4 is difficult to grasp.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and it is intended to prevent the touch switch from operating even when the operation unit is left on a desk or the like when cleaning is interrupted. It is another object of the present invention to provide a vacuum cleaner which has a small diameter so that the operation unit can be easily grasped and which is easy to handle.

[0007]

SUMMARY OF THE INVENTION A vacuum cleaner according to the present invention has an operation unit provided with a grip unit having a built-in power switch unit for controlling ON / OFF of an electric blower of the vacuum cleaner. Is formed from a tubular member that branches off from the air passage tube through which the suction air passes, and a long hole is formed in the surface of the grip portion on the air passage tube side, and protrudes into the cylindrical member on both side walls of the long hole. Each of the inverted walls is formed, and a grip lever having a dog which is exposed from a long hole between the inverted walls and presses an actuator of a power switch unit during operation is movably attached.

[0008]

In the present invention, the power switch is turned ON / OFF by operating the grip lever, and the electric blower of the vacuum cleaner is ON / OFF controlled. Further, since the grip lever is provided on the back side of the grip portion, even if the operating portion is left in the middle of cleaning, a situation in which the grip lever contacts a desk or the like does not occur.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a vacuum cleaner according to one embodiment of the present invention, FIG. 2 is an enlarged side view of an operation unit thereof, and FIG. 3 is a sectional view of the operation unit.

As shown in FIG. 1, in this embodiment, an operating portion 20 is provided with a ventilation passage tube portion 21 through which suction air passes, and a substantially triangular space portion 22 provided thereon to form a grip portion formed in a loop shape. 23. The grip portion 23 is separated from the ventilation pipe 21, and one end of the ventilation pipe 21 is detachably connected to the hose 3 and the other end is connected to the pipe 5. The grip 23 is provided so that the vacuum cleaner can be easily operated. In order to smoothly move the floor brush 2 on the floor, the grip 23 is substantially perpendicular to the axis of the connecting pipe 2a (α = 90). (° ± 15 °).

In the grip portion 23, a switch 24 of a brush rotating electric motor built in the floor brush 2 and a power control of a power blower built in the cleaner main body 1 are provided on the outer side which can be operated with a forefinger or thumb. A slide volume 25 is provided. The switch 24 of the brush rotating electric motor may be provided when necessary.

On the other hand, a grip lever 27 for operating the power switch 26 of the electric blower is provided inside the curved portion of the grip portion 23, that is, at the portion where the abdomen of the four fingers contacts. That is, when the grip lever 27 is gripped, the power switch unit 26 is turned on, and when the grip lever 27 is released, the power switch unit 26 is turned off. A lock lever 2 for locking the grip lever 27 is provided in front of the grip lever 27.
8 is provided for convenience.

Further, the internal structure of the grip portion 23 will be described with reference to FIGS. FIG. 4 is an exploded view of the grip portion, and FIG. 5 is a sectional view taken along line AA of FIG. Grip 23
Switch holder 40 in case 30 forming a curved portion of
Is stored. The case 30 is composed of two parts 31 and 32 divided into upper and lower parts, and the parts 31 and 32 are integrally connected using the elasticity of the material. Switch holder 40
Is composed of a grip lever mounting portion 41 and a lock lever mounting portion 42, and is attached to a mounting boss 44 on the air passage tube portion 21 with a screw 45 through a screw hole 43 provided at the base end of the grip lever mounting portion 41. Similarly, the other lock lever mounting portion 42 is mounted and fixed to the mounting piece 46 on the ventilation path tube portion 21 with the screw 47. The grip lever mounting portion 41 is accommodated between the partition walls 33a and 33b on both sides provided in the case 30, as shown in FIG.

One end of the grip lever 27 has a projection 49 inserted into a hole 48 provided on the base end side of the grip lever mounting portion 41 to hold the grip lever 27 rotatably. The case 30 has an opening between the mounting boss 44 and the mounting piece 46, and the grip lever 27 has a curved touch portion 50 so as to close the opening 34. The touch portion 50 protrudes slightly outside the opening portion 34. A spring 51 is mounted between the grip lever 27 and the grip lever mounting part 41 in order to maintain the protruding state of the touch part 50.

The grip lever mounting part 41 is a power switch part 2
The switch 52 for the electric blower and the switch 53 for the brush motor which constitute 6 are mounted in parallel with a plurality of projections 54, and the respective power switches 52, 5
Dog 5 for simultaneously operating the actuators 55 and 56 of No. 3
7 is provided on the grip lever 27. Further, an engagement portion 59 into which the tip 58 of the lock lever 28 is inserted is provided at the tip of the grip lever 27 so that the grip lever 27 is locked.

On the other hand, the lock lever mounting portion 42 of the switch holding member 40 is formed in a box shape with an open lower side, and the lock lever 28 is slidably received between the mounting piece 46 and the lock lever mounting portion 42. At one end of the lock lever 28, a projection 60 having a semicircular cross section is provided.
Is a locking recess 61 formed in the lock lever mounting portion 42.
a and 61b are elastically locked in the sliding direction. The lock lever 28 is supported by longitudinal support pieces 62a and 62b, and a mounting piece 46 is provided at an intermediate portion.
A knob 64 protruding from the opening 63 is provided.
A stopper 65 for the grip lever 27 is provided in the lock lever mounting portion 42 on the opposite side of the locking concave portions 61a and 61b, and regulates the pressing force on the switches 52 and 53 to protect them. In addition, the lead wires 66 of the switches 52 and 53,
67 is a side wall and a partition wall 33 of the case 30 as shown in FIG.
a, 33b.

Further, the width L ₁ of the case 30 i.e. grip 23 is formed smaller than the width L of the ventilation pipe 21, it is always air passage tube section 21 even when left to casually floor surface the operation unit 20 previously And the power switch unit 26 is protected.

FIG. 6 is a control circuit diagram of the electric vacuum cleaner. Power switches 52 and 53 are electrically connected in series to a slide volume 25 for power control of the electric blower 70. In the figure, reference numeral 71 denotes an electric motor for rotating the brush, and 72 denotes a board for mounting electric parts for controlling the electric blower 70.

Next, the operation of this embodiment will be described. The hose 3, the operation unit 20, the pipe 5, and the floor brush 2 are connected to the cleaner body 1, and the slide volume 25 is set to the "high" side in the case of a carpet, for example, according to the floor surface. Turn ON to operate. At this time, the power switches 52 and 53 are both OFF.
Therefore, the electric blower 70 and the brush rotating electric motor 71 do not start.

When the grip portion 23 is gripped, the grip lever 27 is pushed as shown in FIG.
Since the power switches 5 and 56 are simultaneously pressed, the power switches 52 and 53 are both turned on, and suction from the floor brush 2 is started. At this time, the rear end of the grip lever 27 is
At 65, the actuators 55 and 56 are prevented from being pressed more than necessary.

The suction air passes through the floor brush 2, the pipe 5, the ventilation pipe 21 and the hose 3 in this order.
Is bent, the suction air passes through the ventilation path tube portion 21 at a higher speed. At this time, frictional heat and static electricity are generated between the inner wall of the tube and the tube. However, since the grip 23 is separated, the user does not feel discomfort. In addition, since the grip portion 23 is formed substantially perpendicular to the axis of the connecting pipe 2a of the floor brush 2, it is easy to apply a force to the floor brush 2, and the floor brush 2 can be operated smoothly.

When the cleaning is interrupted or terminated, the grip lever 27 is automatically restored by the spring 51 when the hand is released from the grip portion 23, and the power switches 52 and 53 are both turned off.
As a result, the electric blower 70 and the brush rotating electric motor 71 stop operating.

Further, even if the operation section 20 is left unattended, the grip lever 27 is provided inside the grip section 23, so that it does not touch other objects to operate. When the operation is resumed, the switch 24 and the slide volume 25 are already set, so that the operation can be performed only by gripping the grip portion 23.

If a mechanism for locking the grip lever 27 is used as required, the power switches 52 and 53 are always turned off.
It becomes N state and is convenient. In this case, as shown in FIG.
When the knob 64 is pulled, the distal end of the lock lever 28 engages with the engaging portion 59 of the grip lever 27, and the projection 60 moves from the previous locking concave portion 61a to the next locking concave portion 61b and is locked therewith. The grip lever 27 is locked. As a result, the grip lever 27 is in the same state as when it is gripped, and the power switches 52 and 53 are not turned off even if you release your hand. After cleaning, switch 24 and slide volume 25 are turned off.
Then, it will be treated the same as a conventional vacuum cleaner.

FIG. 9 is a side view showing another embodiment of the present invention, which is a so-called upright type vacuum cleaner. In the case of this vacuum cleaner, the vacuum cleaner main body 1 and the floor brush 2 are of a type that is directly connected without a hose or the like as in the above embodiment and has a handle 80 above.

In this case as well, an operating portion 20 is provided on the upper portion of the handle 80, and the operating portion 20 is provided with a grip portion 23 having a grip lever 27, a lock lever 28, a slide volume 25, etc. Is formed in a loop shape by the supporting portion 29 for supporting the
Can be made wider than the grip portion 23, or the grip portion 23 can be formed so as to be perpendicular to the axis of the connecting pipe 2a of the floor brush 2, and the same operation and effect as described above can be obtained. Note that, in this case, the air passage pipe is not provided, but the support portion 29 forms a part of the operation unit 20 instead of the air passage pipe.

[0027]

As described above, according to the present invention, the following many effects can be obtained. The grip portion is formed of a cylindrical member, a long hole is formed on the surface of the grip portion on the side of the air duct, and inverted walls protruding inside the cylindrical member are formed on both side walls of the long hole, respectively. Since the grip lever is attached between the inverted wall and exposed from the elongated hole, the inverted wall can improve the strength of the grip portion, and also serves as a guide for the grip lever, improving operability. And since this inverted wall is formed inside the grip portion, it does not become an obstacle when gripping the grip portion, and since it does not protrude outside,
It is possible to avoid a substantial increase in the size of the grip portion, which makes it easy to operate even for a person with a small hand (such as a child). When the grip lever of the grip portion is gripped, the electric blower is turned on by the dog and turned off when released, so that the power switch does not have to be turned on and off every time. In addition, the grip lever is disposed on the surface of the grip portion on the side of the air duct, so that the grip lever does not operate even when the operation unit is left on a desk or the like, and is safe. Since the grip portion is configured to branch off from the air duct, there is no discomfort because static electricity or the like, which tends to be generated, is not transmitted to the air duct. The diameter of the grip portion can be reduced to facilitate operation, and even when the operation portion is left unattended, the air passage tube portion first hits the floor surface, so that shock can be reduced and electrical components can be protected. Switches and other electrical components can be integrated into the grip, resulting in a compact design.

[Brief description of the drawings]

FIG. 1 is a side view of a vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of the operation unit.

FIG. 3 is a sectional view of FIG. 2;

FIG. 4 is an exploded view of a grip portion.

FIG. 5 is a sectional view taken along line AA of FIG. 2;

FIG. 6 is a control circuit diagram of the vacuum cleaner.

FIG. 7 is a cross-sectional view showing an operation when the grip lever is gripped.

FIG. 8 is a cross-sectional view showing a state in which the lock lever operates.

FIG. 9 is a side view of another embodiment of the present invention.

FIG. 10 is a side view of a conventional vacuum cleaner.

FIG. 11 is a sectional view of the operation unit.

FIG. 12 is an explanatory diagram showing a disadvantage of a conventional operation unit.

[Explanation of symbols]

1 Vacuum cleaner body, 20 operation part, 23 grip part, 25
Slide volume, 26 power switch section, 27 grip lever, 70 electric blower.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-62423 (JP, A) JP-A-63-309233 (JP, A) JP-A-59-225032 (JP, A) JP-A-2- 257922 (JP, A) JP-A-1-277527 (JP, A) JP-A-58-157445 (JP, A) JP-A-59-122856 (JP, U) JP-A-56-45456 (JP, U) Japanese Utility Model Showa 64-47360 (JP, U) Japanese Utility Model Showa 62-83348 (JP, U) Japanese Utility Model Showa 60-36850 (JP, U) Japanese Utility Model Showa 61-137355 (JP, U) Japanese Utility Model Showa 60-116959 (JP, U)

Claims (1)

(57) [Claims] 1. Turn on / off an electric blower of a vacuum cleaner
A cylinder having a grip portion having a built-in power switch portion for controlling and having a grip portion branched from an air passage pipe portion through which suction air passes
A long hole is formed on the surface of the grip portion on the side of the air duct , and inverted walls protruding into the cylindrical member are formed on both side walls of the long hole. , vacuum cleaner, characterized in that the exposed from the slot between the inverted walls, a grip lever having a dog to press the actuator of the power switch unit during operation mounted movably.