JPH06133907A - Suction mouth of electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To enhance the easiness in assembly works for a suction mouth by energizing a bypass valve, which is to open and close a bypass installed in a suction passage, in the direction the bypass is opened always in the free state by a spring, and furnishing a projection on the wall side of the slide surface of the bypass valve with the wall having bypass. CONSTITUTION:The suction passage 55 of a bypass nozzle 19 in its adjoining surface with a bypass lever 20 is overlapped with the suction passage 56 of the bypass lever 20, and a projection 65 is provided at a certain distance in the sliding direction of the lever 20 while energized by a spring 59 from the lever 20 in the condition that the bypass is opened. Accordingly, the spring 59 energizes the lever 20 for installation adjoining to the nozzle 19 fitted in a lower case 3 at the time of assembling a suction mouth by this projection 65 and there is no risk of setting off from a notch in the form of circular arc for shaft supporting of a rib 57 installed projecting on the lower case 3. This constitution enhances the easiness in assembly works.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction member of an electric vacuum cleaner, and particularly when the suction member is lifted from the floor, it is possible to prevent noise during lifting and to increase the number of rotations of the rotary brush. Regarding things to prevent.

[0002]

2. Description of the Related Art An air turbine suction port of a conventional electric vacuum cleaner has a suction port rotatably provided at a rear end portion of the suction port as described in JP-A-57-180928 and JP-A-59-166124. By rotating the joint when the suction body is separated from the floor surface,
It was to open the bypass passage.

[0003]

Since the opening and closing of the bypass passage of the air turbine suction port of the conventional electric vacuum cleaner uses the swivel joint provided so as to be rotatable, the swivel angle of the suction port joint is increased. The bypass passage area required to prevent noise from being generated because the tip of the suction body hits the floor surface when returning the suction body from the lifted state to the floor surface, or the rotation angle is regulated to prevent noise generation. There was a problem that I could not take it.

In order to solve this problem, the bypass passage has a bypass passage irrespective of the rotation angle of the suction joint, the bypass passage is closed whenever the suction body is on the floor, and the bypass passage is opened when lifted. A sucker for an electric vacuum cleaner has been developed that can prevent noise during lifting and can prevent an increase in the number of rotations of a rotary brush.

However, it has been found that this suction member has a problem that when the suction member is assembled, the bypass valve is biased by the spring to move out of the assembling position as shown in FIG.

In view of the above problems, it is an object of the present invention to provide a suction body of an electric vacuum cleaner capable of preventing the bypass valve from being biased by a spring and coming out of an assembling position at the time of assembling the suction mouth. It is in.

[0007]

The above object of the present invention includes an air turbine having a plurality of blades which are rotated by an intake air flow, and a rotary brush which is rotated by using the air turbine as a drive source, and is provided below A plurality of wheels for traveling on the floor are provided, a bypass passage is provided in the suction passage, and a bypass valve that opens and closes the bypass passage is always urged by a spring in a direction in which the bypass passage opens and the bypass valve is opened. This is achieved by providing a protrusion on the wall side of the sliding surface between the wall and the wall having the bypass passage.

[0008]

According to the present invention, when the suction valve is assembled, the bypass valve provided adjacent to the wall surface having the bypass passage is provided with the disengagement preventing means when the bypass valve is biased by the spring to slide in the direction away from the assembled position. Accordingly, it is possible to provide the suction body of the electric vacuum cleaner having the bypass passage, which can prevent the bypass valve from coming off and improve the workability in assembling the suction body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The suction body 1 forms an outer shell by an upper case 2 made of synthetic resin, a lower case 3 made of synthetic resin, and a suction port cover 4 made of synthetic resin.
A bumper 5 for preventing damage to furniture and the like is provided between the suction port cover 4 and the suction port cover 4, a vertically rotatable synthetic resin casing 6 is provided at the rear end portion, and a rotatable synthetic resin suction port is provided at the end thereof. The joint 7 is connected.

The lower case 3 has a laterally long suction port 8 formed on the lower front side, and is flexible in front of and behind the suction port 8 and has a suction port 8.
The pressure control plates 9 and 10 (thin elastic material) for holding the suction pressure in the inside are arranged in the lateral direction, and further, behind the pressure control plate 10, a sticking plate 63 made of a polyolefin resin having excellent slipperiness.
Is pasted. An intake port 70 having a filter 69 is provided at the rear part of the lower case, and the lower case 3 is provided with a roller 11 on the lower front side and wheels 12, 13 on the lower rear side, respectively. A fixed gap is formed between the lower surface of the lower case 3 and the floor surface by the numbers 12 and 13. On the upper part of the upper case 2, there is formed a part in which the decorative cover 60 is attached. The suction port cover 4 has opening / closing levers 61 and 62 made of synthetic resin on both sides and can be removed from the upper case 2 and the lower case 3 by operating them. Inside the mouthpiece 1,
Rotary brush chamber 1 for storing the rotary brush 14
5, a turbine chamber 17 for accommodating the air turbine 16 which serves as a drive means for the rotary brush 14 while guiding the dust entering from the suction port 8 to the casing 6 and the suction port joint 7;
Nozzle 18 for blowing dust entering through suction port 8 and wind for rotating air turbine 16 into turbine chamber 17.
A bypass nozzle 19 serving as a bypass passage in the turbine chamber 17 serving as a suction passage, a synthetic resin bypass lever 20 for opening and closing the bypass nozzle 19, an arm 21 rotatably supported by the bypass lever 20 on a shaft, and a surface to be cleaned. There is a synthetic resin switching lever 22 that can switch wipes from the carpet with one touch.

In the rotary brush 14, a flexible blade 23 having a high dust-raising effect and a brush 24 having a high wiping effect made of high-density nylon fiber are provided on the outer periphery of the rotary core 25 in the axial direction. The rotary core 2 has a pulley 26 having a gear or the like on one side and a flange 27 on the other side, which is disposed in a groove portion that is twisted and extended by 360 °.
A shaft 64 is press-fitted at both ends of the shaft 5, and is rotatably supported by a slide bearing 28. A bearing cover 29 in which the slide bearing 28 is press-fitted is held by a pair of opposing support ribs 30 and 31 provided in the lower case 3. ing. Here, when the suction body 1 is placed on the cleaning surface, the brush 24 is set to a size that contacts the cleaning surface, and the blade 23 is set to a size that opens a slight gap with the cleaning surface. When cleaning, you can wipe the floor without damaging it.

The synthetic resin air turbine 16 (Pelton turbine) arranged in the turbine chamber 17 has a plurality of blades 32 and is formed by symmetrically dividing the runner left 33 and the runner right 34 into the runner left 33 and the runner. The knurl 38 formed on the turbine shaft 37, the U-shaped ring 39 fixed to the turbine shaft 37, and the push nut 40 are integrated so that the convex portion 35 and the concave portion 36 provided opposite to the right 34 are aligned with each other. Install on. The turbine shaft 37 is received by ball bearings 43, 44 inserted in a bearing holder 45, and a washer 46 is provided between the ball bearing 43 and the U-shaped ring 39.
Between the ball bearing 44 and the drive pulley 41 pressed into the end of the turbine shaft 37.
Equipped with 7. The rotational force of the air turbine 16 is transmitted to the rotary brush 14 by a belt 42 wound around the drive pulley 41 and the pulley 26 of the rotary brush 14. Locking the air turbine 16 into the suction body 1
The bearing holders 45 are incorporated into the receiving pedestals 48 and 49 protruding from the lower case and the upper case to prevent movement.

The nozzle 18 for blowing the dust blown from the suction port 8 and the wind for rotating the air turbine 16 into the turbine chamber 17 is provided on the same surface as the rear partition wall 52 of the rotary brush chamber 15, and the air turbine 16 Runner left 3
3 and the runner right 34, the main nozzle 50 and the main nozzle 5 which blow the suction airflow to the air turbine 16 centering on the matching portion.
Another sub-nozzle 51 that does not blow on the air turbine 16 is provided in parallel with 0. A switching lever 22 that switches the opening and closing of the sub-nozzle 51 and has a curved surface 71 on the upper surface is provided slidably, and the switching lever mounting portion 75 of the upper case is provided.
Switching can be performed by the operation knob 53 that is further projected.

A plurality of suction passages 55 are provided on a side wall 54 of the turbine chamber 17 for accommodating the air turbine 16 which is a suction passage for dust entering from the suction port 8 and serves as a bypass passage. The bypass nozzle 19 is provided so as to be slidable in the vertical direction, is adjacent to the bypass nozzle 19, has a plurality of suction passages 56 on the adjacent surface, and is rotatably supported by a rib 57 protruding from the lower case 3. A lever 20 is provided.

The bypass lever 20 is interlocked with a vertically floatable axle 58 which penetrates the wheel 12 through an arm 21 which is rotatably supported.
The ribs 67 and 68 for preventing the wheel 12 from coming off from the lower case 3 are provided in the lower case 3 by a spring 59, that is, when the suction body 1 is separated from the floor surface, the wheel 12 is always opened in the direction in which the bypass passage opens. The mouthpiece 1 is urged toward the business trip.

Further, the bypass nozzle 19 has a protrusion 65 on the surface adjacent to the bypass lever 20, and the protrusion 65 overlaps the suction passage 55 of the bypass nozzle 19 and the suction passage 56 of the bypass lever 20 to open the bypass passage. The bypass lever 20 is provided at a distance from the bypass lever 20 in the sliding direction by being biased by the spring 59.

In assembling the mouthpiece 1, pressure control plates 9 and 10 (thin elastic members) are arranged laterally below, and a polyolefin resin having excellent slipperiness is provided behind the pressure control plate 10. Stick the sticking plate 63 of the roller 1 on the lower front side.
1 and a bumper is attached to the outer periphery of a lower case having wheels 13 on the lower rear side. The wheels 12 pass through the axles 58 through the notches 73 in the wall provided at the casing 6 attachment position, and the axle guide holes 74 and , The wheel 12 is penetrated, and both ends of the axle 58 are engaged with the axle guide holes for attachment.

Above the lower case 3, the air turbine 1
6 and the rotary brush 14 are linked together by a belt 42, and the switching lever 22 is mounted so as to be slidable. The nozzle 18 and the bypass nozzle 19 are fitted so as to be vertically slidable, and adjacent to the bypass nozzle 19.
The arm 21 is rotatably supported, and the bypass lever 20 to which the spring 59 is attached is attached to the rib 57 of the lower case 3.
At this time, the bypass lever 20 is assembled by being engaged with the protrusion 65 provided on the bypass nozzle 19.

Further, the lower case 3 in which the suction joint 7 is rotatably attached is covered with the upper case 2 and the suction port cover 4 and assembled, and the upper case 2 has the notch 73 of the lower case 3. Opposing walls 72 are provided to prevent the axle 58 from coming off after assembly.

With such a structure, when cleaning the wooden floor, the switching lever 22 is moved outward and the two main nozzles 5 are
0, the sub nozzle 51 sucks dust into the turbine chamber. At this time, since the air blown from the sub nozzle 51 does not blow to the air turbine 16, the amount of air passing through the main nozzle 50 decreases, the rotation speed of the air turbine 16 and the rotary brush 14 driven by the air turbine 16 And the rotary brush 14 rotates at a rotation speed (2500 to 3000 r / min) suitable for wiping. When cleaning the carpet, the main nozzle 50 that pushes the switching lever 22 inward and blows air on the air turbine 16
Inhale dust only from. Since all the wind sucked by the main nozzle 50 is blown to the air turbine 16, the air turbine 16 and the rotary brush 14 driven by the air turbine 16 rotate at a relatively high speed, and the rotation speed suitable for cleaning on the carpet. (3000-3500r / m
in) is obtained. Therefore, when the suction body 1 is on the surface to be cleaned, the switching lever 22 can perform cleaning suitable for the cleaning surface. At this time, the bypass nozzle 19 is always closed by the bypass lever 20 as shown in FIG. 6, and the air enters the turbine chamber 17 only from the nozzle 18. When the suction body 1 is separated from the surface to be cleaned,
As shown in FIG. 5, an axle 58 to which the arm 21 rotatably supported by the bypass lever 20 is attached protrudes in the floor surface direction by a spring 59, and the suction passage 55 of the bypass nozzle 19 and the suction passage 56 of the bypass lever 20. Since they overlap with each other to form a bypass passage, the air that does not blow to the air turbine 16 flows in, and the amount of air entering from the nozzle 18 decreases. Therefore, the rotation speed of the air turbine 16 and the rotary brush 14 driven by the air turbine 16 is approximately 2500 ~ 3000
Since it falls to r / min, it is possible to avoid generation of a large amount of noise due to the air load of the air turbine in the lifted state of the suction body 1.

Further, in the assembling, the suction body 1 as shown in FIG. 10 is provided by the projection 65 provided on the bypass nozzle 19.
In assembling, the bypass lever 20 installed adjacent to the bypass nozzle 19 fitted in the lower case 3 is biased by the spring 59 and comes off from the arc-shaped notch of the rib 57 protruding from the lower case 3 for axial support. Therefore, it is possible to improve workability during assembly.

[0022]

According to the present invention, when the suction valve body is assembled, the bypass valve provided adjacent to the wall surface having the bypass passage is biased by the spring and is prevented from coming off when it is slid in the direction away from the assembled position. By providing the means, the bypass valve can be prevented from coming off, and the workability at the time of assembling the suction body can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a bypass passage portion in which a bypass lever is locked to a protrusion according to an embodiment of the present invention.

FIG. 2 is a plan view of a part of the suction body excluding the upper case, showing the embodiment of the present invention.

3 is a cross-sectional view perpendicular to the turbine shaft of FIG.

FIG. 4 is a plan view when the upper case of the suction body is attached in FIG.

5 is a plan view seen from the back surface of FIG. 2. FIG.

FIG. 6 is a cross-sectional view of the bypass passage portion with the bypass passage closed.

FIG. 7 is a cross-sectional view of the bypass passage portion with the bypass passage opened.

FIG. 8 is a cross-sectional view of an axle portion that can be vertically floated.

FIG. 9 is a cross-sectional view of an assembled portion of an axle that is vertically floatable.

FIG. 10 is a sectional view of a bypass passage portion in a state where a conventional bypass lever is disengaged from a rib.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Suction body, 12, 13 ... Wheel, 14 ... Rotary brush, 16 ... Air turbine, 18 ... Nozzle, 19 ... Bypass nozzle, 20 ... Bypass lever, 21 ... Arm, 5
8 ... Axle, 59 ... Spring, 65 ... Protrusion.

Claims (3)

[Claims] 1. An air turbine having a plurality of blades that rotate by a suction air flow, a rotary brush that rotates using the air turbine as a drive source, and an inside of a suction body for traveling on a floor below the suction body. In the suction body of the electric vacuum cleaner, which has a plurality of wheels, forms a bypass passage in the suction passage, and opens and closes the bypass passage, the bypass valve is a spring-loaded suction body of the vacuum cleaner. Prevents it from coming off the assembled position during assembly,
A suction body for an electric vacuum cleaner, which is provided with a detachment prevention means. 2. The suction port of the electric vacuum cleaner according to claim 1, wherein the preventing means is a protrusion provided on a wall side of a sliding surface between the bypass valve and a wall having the bypass passage. body. 3. The projecting portion is provided in a direction in which the bypass valve is biased by a spring rather than a bypass valve position when the bypass passage is in an open state.
The suction body of the vacuum cleaner described.