JP3140271B2 - Vacuum cleaner suction body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port of a vacuum cleaner, and more particularly, to a suction port provided with a rotating body for scraping dust attached to a carpet or the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 12A, a motor 2 is opposed to a suction port 1a formed in a lower case 1.
, A switch 4 for electrically turning on and off the driving of the motor 2, and a rotating roller 5 as a detecting unit protruding from the bottom surface 1 b of the lower case 1.
Is rotatably held via a shaft 5a and the switch 4
And an operation unit 6 that mechanically controls ON / OFF of the current supply state.

The operating section 6 is provided integrally with a shaft 7 supported by the lower case 1, and has a bracket 8 which rotates about the shaft 7 as a fulcrum, and FIGS. 11 (A), 11 (B) and 11 (C). As shown in the figure, a case 9 that covers the bracket 8 from above,
And a ball 10 provided in a free state.

[0004] The shaft 7 and the bracket 8 are shown in FIG.
As shown in FIG. 10B, when the suction port body S is separated from the target surface M for cleaning the floor or the like (the state shown in FIG. 10A), the rotating roller 5 protruding from the bottom surface 1b. Is large and the suction port body S is in contact with the target surface M in contact with the target surface M (the state shown in FIG. 10A).
The rotating roller 5 is held so that the amount of projection of the rotating roller 5 protruded upward from the bottom surface 1b is reduced.

[0005] As shown in FIG. 12 (B), an operation projection 7 abutting on the terminal 4 a of the switch 4 is provided at the end of the shaft 7.
As shown in FIGS. 11A and 11B, the operation projection 7a rotates (in the direction of arrow a) in conjunction with the rotation of the shaft 7 accompanying the displacement of the rotating roller 5, and as shown in FIGS. Mechanically
N (state of FIG. 11 (B) and FIG. 10 (B)) ・ OFF
(The state of FIGS. 11A and 10A).

On the other hand, when the suction opening S is turned upside down, as shown in FIG. 11C, the suction opening S is guided to the rib 9a of the case 9 in conjunction with the upside down operation (in the direction of arrow B). The moved ball 10 is located between the rib 9a and the stopper piece 9a protruding from the bracket 8 to prevent the shaft 7 from rotating.

Therefore, for example, when the suction port S is inadvertently turned upside down while the motor 2 is driven, even if the rotating roller 5 is unexpectedly pushed down, the rotation of the shaft 7 is prevented and the switch is turned off. The OFF state of 4 is maintained, and as a result, the rotation of the rotating body 3 is prevented.

[0008]

By the way, in the suction opening 1 of the vacuum cleaner constructed as described above, the ball 10 is sandwiched from above and below as a rotation preventing stopper. When the suction port body 1 is brought into contact with the ground to start the operation or when the suction port body 1 climbs over a sill or the like during use, the ball 10 rides on the upper end surface of the stopper piece 8a due to the shock (FIG. 11A ) In the direction of arrow c) when the stopper piece 8a and the rib 9a are in a blocking state or the suction port body 1 is inadvertently turned upside down and then turned upside down again, etc. , Ball 1
There is a possibility that the state of 0 may be maintained as it is, which is held between the stopper piece 8a and the rib 9a.

The present invention has been made in view of the above circumstances, and uses a ball to prevent a mechanical ON operation of a switch, but ensures its operation only when certain conditions are satisfied. It is an object of the present invention to provide a suction port of a vacuum cleaner that can be used.

[0010]

SUMMARY OF THE INVENTION The present invention, in order to achieve its objectives, the rotary member is rotated by the driving of the and the motor opposite to the suction port formed in the body, the motor is built into the body a switch for electrically ON · OFF control drive, HiKiyoshi of the body protruding from the bottom surface of said body
In conjunction with the detecting portion when closed pre <br/> SL body detection unit which moves in conjunction with the separated-ground to掃面 is grounded surface to be cleaned
And the switch is turned on, and the main body is
Can be linked with the detection unit when is separated from the surface to be cleaned.
Comprising an operation portion for operating the dynamic and OFF the switch, and a stopper piece interlocked with the movable of the operation portion, a ball that moves in conjunction with upside down operation in the vertical direction of the body, said body upside down When turned, to prevent the operation unit from moving, and to maintain the OFF state of the switch,
The gist is that a contact portion for guiding and retaining the ball at a position where the ball is sandwiched between the main body and the stopper piece in the horizontal direction is provided .

[0011]

In such a configuration, a rotating body which is rotated by driving of the motor is opposed to a suction port formed in the lower case, and a switch for electrically turning on / off the driving of the motor is built in the main body. The lower case has a detection unit that protrudes from the bottom of the case, and an operation unit that mechanically turns on and off the switch according to the amount of protrusion of the detection unit is rotatably supported by the lower case. The ball, which moves in the vertical direction in conjunction with it , is guided to a position where it is sandwiched in the horizontal direction between the stopper piece and the main body that are linked with the rotation of the operation unit.
To prevent the operation unit from turning in the reverse direction,
Maintain the F state.

[0012]

Next, an embodiment of a suction port of a vacuum cleaner according to the present invention will be described with reference to FIGS.

9 (A) and 9 (B), the suction port 1
1 is a lower case 12 of a substantially rectangular shape formed in a predetermined shape, which is long in the left-right direction, upper cases 13 and 14 which cover the upper part of the lower case 12 in two front and rear parts,
And a connection hose 15 sandwiched between the upper case 13 and a bumper 16 for protecting a side surface.

The lower case 12 includes a pair of left and right front wheels 17,
17 and the rear wheels 18, 18 are rotatably supported. The lower case 12 has a suction port 12a extending in the longitudinal direction.
Is held. Further, as shown in FIG. 8, a rotation roller 20 is rotatably supported on the lower case 12 via an operation unit 21.

The rotating body 19 is rotated via a belt 23 by the rotation of a motor 22 held by the lower case 12, and the rotation causes the elastic elastic blades 24, 24,.
Scrapes garbage attached to carpets.

The operation unit 21 is shown in FIG. 7 and FIG.
As shown in (B), a bracket 26 that rotatably supports the rotating roller 20 via a shaft 25, and a lower case 12
2 that is supported by the shaft and rotatably supports the bracket 26
7, a coil spring 28 wound around one end of the shaft 27 to urge the rotating roller 20 in the protruding direction, an arm 29 supporting one end of the coil spring 28 with a groove 29a, and a projecting end at the other end of the shaft 27. 5 (A) and 5 (B).
Bracket 26 in conjunction with separation / grounding of zero to ground surface M
Are rotated and displaced integrally with the rotating roller 20.

On the other hand, as shown in FIG.
The upper part is covered by a cover cap 31.

The cover cap 31 is shown in FIG.
As shown in (B) and (C), a pair of legs 31a, 31
It is fixed to the lower case 12 by a. The cover cap 31 has an arc-shaped cover portion 32 that covers the rotating roller 20, a pair of support protrusions 34 protruding from the side surface of the cover portion 32 to hold the switch 33, and a print cap 31 as shown in FIG. A positioning protrusion 36 for supporting the substrate 35, support protrusions 37, 37..., And a substantially U-shaped guide portion 38 which is open in the front and viewed in plan.

A ball 39 is provided in the groove 38a of the guide portion 38.
Is provided. The groove 38a is provided in the stopper piece 30.
Is formed at a position facing the free end 30a.

The switch 33 is provided on the pipe to which the connection hose 15 is connected, and is electrically connected to a condition selection switch for selecting cleaning conditions, for example, for cleaning a carpet and for cleaning a tatami mat. The rotator 19 is rotated via the motor 22 only when the switch 33 is turned on when the carpet is selected by the condition selection switch.

The ON / OFF of the switch 33 is
As shown in FIGS. 1 (A) to 1 (F), the contact point 33 is rotated by the rotation of the arm 29 and the contact point 33a is rotated.
b switches the energized state.

In order to assemble the suction port body 11 in the above configuration, first, the rotating body 19, the motor 22, and the belt 23 are provided in the lower case 12, and the operation unit is wound with the coil spring 28 wound around the shaft 27. 21 is supported (the state shown in FIG. 8).

Next, the cover cap 31 is attached to the lower case 2.
After fixing the switch 33 and the printed circuit board 35 to the cover cap 31, the ball 39 is inserted into the groove 38a (the state shown in FIG. 2).

Further, the upper cases 13 and 14 are fixed to the lower case 12 so that the connecting hose 15 and the bumper 16 are sandwiched between the lower case 12 and the upper case 13 (the state shown in FIG. 9).

On the other hand, for example, when the entire vacuum cleaner is moved from a predetermined storage room such as a push-in operation to a desired cleaning place and cleaning is started, the connecting hose 15 is connected to a pipe (not shown). The main switch provided on the body is turned on to perform cleaning while operating the tube.

At this time, when cleaning the carpet or the like, the use of the rotating body 19 is selected by a condition selection switch provided on the tube.

When the suction port 11 is separated from the ground plane M, for example, when the suction port 11 is moved to a desired position, the rotation is performed as shown in FIG. The roller 20 also separates from the ground plane M, and at the same time, the amount of protrusion from the lower case 12 increases due to the urging force of the coil spring 28.

Accordingly, the arm 29 separates from the contact arm 33a and the switch 33 is turned off, and the rotating body 1
9 is stopped. At this time, the ball 39
As shown in FIG. 1B, it is located in the recess of the stopper piece 30.

Next, when the suction port body 11 is moved to a desired cleaning location and the suction port body 11 is grounded to the ground surface M, FIG.
As shown in (C), the rotating roller 20 rotates the shaft 27 while being pushed up by the ground contact surface M against the urging of the coil spring 28, and the arm 29 moves the contact arm 33 a in conjunction with the rotation of the shaft 27. And contact 3
3b turns on the switch 33 to rotate the rotating body 19. At this time, the ball 33 is located in the recess of the stopper piece 30 as shown in FIG.

On the other hand, if the suction opening 11 is inadvertently turned upside down while the condition selection switch is selecting a carpet during cleaning, the shaft 27 is prevented from being accidentally pushed down. The rotation has been stopped.

That is, when the suction port body 11 is turned upside down, the suction port body 11 is once lifted and separated from the ground plane M, so that the motor drive stop state shown in FIGS. 1A and 1B is stopped. Is turned upside down.

The ball 39 is, as shown in FIG.
The guide portion 38 as a contact portion is interlocked with the reverse operation.
Move to a position where it comes into contact with the wall surface of the upper case 14 and the protrusion 14a as a contact portion protruding from the upper case 14.

Therefore, since the ball 39 is located between the guide portion 38 integrally fixed to the lower case 12 and the free end portion 30a of the stopper piece 30, the ball 39 is biased by the coil spring 28 in this reverse state. When the rotation roller 20 is pressed down in the opposite direction, the center axis J of the ball 39 is sandwiched between the guide portion 38 and the stopper piece 30 from the horizontal direction, and the rotation of the shaft 27 is prevented.
As shown in (E), the contact arm 33 by the arm 29 is used.
a is prevented from rotating in the energizing direction and the switch 33 is turned off.
The F state is maintained.

On the other hand, when cleaning is resumed by operating the suction opening 11 in the vertical direction again, the ball 39 returns to the position shown in FIG. 1B in conjunction with the vertical operation. Thereafter, the state shown in FIG. 1D is reached, and the rotating body 19 rotates.

By the way, the ball 39 used in the present invention
Is configured not to be held in the vertical direction as in the conventional ball 10 but to be held in the horizontal direction, so that the suction port body 11 is in the vertical front direction, that is, in a normal use state. In this case, not only does the ball 39 stay at the position where the ball 39 is held, but also if the ball 39 is not located at the position sandwiching the center axis J, the shape of the ball 3 depends on its shape.
9 cannot be pinched, so that there is no unexpected lock state.

That is, even if the suction port 11 receives a shock in the up-down direction, such as when the vehicle rides on a sill, the ball 39 is moved from the concave portion to the guide portion by the U-shaped stopper piece 30. The suction port body 11 does not move in the direction toward the position sandwiched by the stopper piece 38 and the stopper piece 30 but moves in the substantially horizontal direction (the direction indicated by the arrow E in FIG. 1B). When there is no member for guiding the ball 39 to the holding position or a member for stopping the ball 39 at the holding position, the guide portion 38
The ball 39 is not pinched between the stopper 39 and the stopper piece 30.

[0037]

As described above, in the suction opening of the vacuum cleaner according to the present invention, when the main body is turned upside down, the rotation of the operation section is maintained so as to maintain the OFF state of the switch. By holding the ball for preventing movement in the horizontal direction between the main body and the stopper piece, a specific condition was satisfied while using the ball for preventing the mechanical ON operation of the switch. The function can be reliably performed only in the case.

[Brief description of the drawings]

FIG. 1 shows a suction port of a vacuum cleaner according to the present invention;
(A), (C) and (E) are explanatory diagrams of the operation of the switch under each use condition, and (B), (D) and (F) are FIGS.
It is operation | movement explanatory drawing of the stopper piece corresponding to (C) and (E).

FIG. 2 is an enlarged plan view of a main part in a state where a printed circuit board is provided.

3A and 3B show a cover cap, wherein FIG. 3A is a plan view, FIG. 3B is a side view, and FIG. 3C is a longitudinal sectional view.

FIG. 4 is an enlarged plan view of a main part in a state where a cover cap is attached.

5A and 5B show the usage state of the suction port body, wherein FIG. 5A shows a non-ground state and FIG. 5B shows a ground state.

6A and 6B show the appearance of the operation unit, wherein FIG. 6A is a plan view and FIG. 6B is a side view.

FIG. 7 is a bottom view of a main part of the lower case.

FIG. 8 is a plan view of a main part with the upper case removed.

9A and 9B show the appearance of the suction port body, wherein FIG. 9A is a perspective view in a plane direction, and FIG. 9B is a perspective view in a bottom direction.

10A and 10B show a usage state of a conventional suction port body, where FIG. 10A shows a non-ground state and FIG. 10B shows a ground state.

11 (A), (B), and (C) are operation explanatory diagrams showing the operation unit in each use situation.

FIG. 12A is a plan view of the suction port body, and FIG.
Is an enlarged view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Suction port body (main body) 22 ... Motor 19 ... Rotating body 12 ... Lower case 12a ... Suction port 33 ... Switch 20 ... Rotating roller (detection part) 21 ... Operation part 39 ... Ball 30 ... Stopper piece

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Junji Naito 43, Horiyamashita, Hadano-shi, Kanagawa Tokyo Electric Co., Ltd. Hadano Plant (56) References JP-A-3-267035 (JP, A) JP-A-6-26 90879 (JP, A) JP-A-6-327759 (JP, A) JP-A-6-343358 (JP, A) JP-A 7-116094 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/04 A47L 9/28

Claims (1)

(57) [Claims] And 1. A rotary member is rotated by driving opposing and motor to the suction port formed in the body, a switch for electrically ON · OFF controlling driving of the motor is built into the body, said body Of the body protruding from the bottom of
In conjunction with the detecting portion when closed pre <br/> SL body detection unit which moves in conjunction with the separated-ground to掃面 is grounded surface to be cleaned
And the switch is turned on, and the main body is
Can be linked with the detection unit when is separated from the surface to be cleaned.
Comprising an operation portion for operating the dynamic and OFF the switch, and a stopper piece interlocked with the movable of the operation portion, a ball that moves in conjunction with upside down operation in the vertical direction of the body, said body upside down When the ball is turned, the ball is guided to a position where the ball is horizontally held between the main body and the stopper piece so that the operation unit is prevented from moving and the switch is kept in the OFF state. Abutment part to make and stay
A suction body for an electric vacuum cleaner.