JPH0670865A - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] The electric motor for driving the self-propelled wheels provided in the suction port body is downsized to make the suction port body itself small and lightweight, and also the traveling performance of the left and right cornering is improved. . Further, the shape of the self-propelled wheel is improved so that light running performance can be obtained regardless of the type of cleaning surface. A wheel driving electric motor 37 for driving the self-propelled wheels 36, 36 is provided, and a speed reducer 44 is provided at a tip of a shaft of the wheel driving electric motor 37. The speed reducer 44 comprises a planetary gear 45, and a bevel gear A50 and a bevel gear B52 are used as a transmission device for transmitting the decelerating rotational force of the planetary gear 45.
Then, the differential device 53 for transmitting the rotational force of the bevel gear A50 and the bevel gear B52 is attached to the axle 5 of the self-propelled wheels 36, 36.
The contact surfaces of the self-propelled wheels 36, 36, which are provided on the floors 1, 51, are provided so as to be substantially equally divided by the flat surface 64 and the uneven surface 65. For the carpet, run on the uneven surface 65.

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 upright type electric vacuum cleaner having a suction port body containing wheels driven by an electric motor and a rotating brush.

[0002]

2. Description of the Related Art Heretofore, some of these types use a dedicated electric motor for driving a wheel or use a single electric motor to drive a rotary brush. And, as a means for decelerating the rotation of the electric motor and transmitting the decelerated rotation to the wheels and the rotating brush, both have been gears and belts processed on the shaft of the electric motor.

Further, the wheels are connected to a single axle, and the two wheels simultaneously rotate in the same direction and at the same rotation speed.

Further, the contact surface of the wheel with the cleaning surface is flat or has irregularities on the floor surface,
I was running on the same wheel on the fold and carpet.

Generally, in an upright type electric vacuum cleaner, as shown in FIG. 15, a cleaner body 101 and a suction port body 102 are connected so as to be elevated, and the cleaner body has a handle 103. A handle 104 is provided,
The cleaner main body 1 removes dust sucked from the suction port body 102.
The suction hose 105 for feeding into the dust collecting bag (not shown) in 01 is the cleaner body 101 and the suction port body 10.
2 is connected to. At the time of cleaning, extend the handle 104 provided on the cleaner body 101 to remove the handle 1
03 is grasped and the cleaner main body 101 is moved back and forth for cleaning. The position of the handle 103 at that time is arranged so as to be located between the user and the cleaner body 101, and the handle 103 protrudes from the cleaner body 101 as shown in FIG. It is supposed to be in position.

Further, when the suction port body absorbs dust near a wall or in a corner of furniture, a shielding plate for opening and closing the front surface from the lower surface of the dust suction opening portion of the suction port body is provided in order to improve the dust absorption performance. I was opening the board. The opening means is provided with a wave-type operating body as described in Japanese Utility Model Laid-Open No. 63-136554, and the shielding plate is opened and closed by moving the operating body back and forth.

[0007]

The conventional electric vacuum cleaner described above has the following problems.

1. Even if the electric motor for driving the wheels is provided, the reduction gear ratio is limited in the belt speed reducer, so that an electric motor having a low rotational speed and a high output has been used. Therefore, there is a drawback that the electric motor itself becomes large and the suction port body becomes large and heavy.

Further, when one electric motor is used to drive both the rotating brush and the wheels, there is a drawback that the rotation speed of the wheels rotates at a high speed and the operability of the suction port body deteriorates.

Further, as described above, whether using two electric motors or a single electric motor, the wheels are connected by the same axle, and the rotation direction of the wheels is rotation with respect to the axle that directly connects both wheels. Therefore, there is no problem in moving the suction port body back and forth, but when changing the direction, it was very difficult to operate.

2. If the entire contact surface of the wheel with the cleaning surface is flat, light running performance can be obtained on the floor surface and folding, but not on the carpet. Further, if the wheel has unevenness on the entire surface, there is a risk that the floor surface and the fold may be damaged.

3. The wave button is switched back and forth by a leaf spring as a means for opening and closing the shielding plate of the suction port body,
The spring pressure of the leaf spring serves both as an operating force for the wave button and for positioning the shield plate, that is, the arm. However, if the spring pressure is weakened in order to lighten the operation of the wave button, the positioning of the arm becomes unstable and the shield plate may be switched due to the impact during cleaning.

On the contrary, if the spring pressure is increased, there is a problem that the button operation is difficult, and the spring pressure of the leaf spring is very severe in design and the allowable range is very small. Therefore, there are various restrictions on the material and shape of the spring, which causes a problem in parts management.

4. Since the handle of the upright type vacuum cleaner is located behind the vacuum cleaner body, the front and rear dimensions (depth dimension) of the entire vacuum cleaner are from the front of the suction port body to the rear end of the handle handle. However, when the product is packed in this state, a packing material that requires a large volume is required, and there are problems that workability at the time of packing is deteriorated and packing cost is high.

[0015]

The means for solving the above problems are as follows. 1. A cleaner main body having an electric blower, a dust collecting chamber, and a handle provided with a handle near the top, a rotary brush and wheels, and a rotary brush driving motor and wheels for driving the rotary brush and wheels. An electric vacuum cleaner in which a motor and a speed reducer for transmitting the rotations of the both motors and a transmission device are incorporated and a suction port body having a dust suction opening on a lower surface thereof is connected so as to be able to be lifted up and down. A planetary gear is used for the speed reducer, a differential device is provided at a substantially central portion of an axle that axially supports the wheels, and transmission means for transmitting rotation of the speed reducer is provided.

2. A handle of the handle is provided on one of the front and the rear of the cleaner body so as to be vertically expandable and contractible, and the handle is arranged so as to be located on the cleaner body side.

3. In an electric vacuum cleaner in which a wheel driven by an electric motor is installed in a cleaner body or a suction port body, a flat surface is provided on one of the inside or the outside of the contact surface of the wheel with the cleaning surface, and the other half is provided on the other side. Provide an uneven surface. Then, a height difference is provided between the flat surface and the convex surface of the uneven surface of the wheel.

4. In an electric vacuum cleaner having an electric blower and a dust collecting chamber built-in, and a cleaner body, and a suction port body having a dust suction opening portion on a lower surface thereof, the dust suction opening portion is formed from a lower surface to a front surface. A shield plate for opening and closing the front side of the dust suction opening is provided, and the shield plate pivotally supports an arm extending rearward and pivots about the pivot point to open and close the front side of the dust suction opening. On the other hand, an elastic body that constantly urges the rear end of the arm upward is provided, and an operating body that moves the rear end of the arm up and down is provided. The operating body moves the rear end of the arm by the first operation. The lower end is locked, and the second end operation unlocks the rear end of the arm.

[0019]

The present invention has the following features due to the above-mentioned configuration. Since the speed reducer is compact and lightweight, the suction port body is compact and lightweight. In addition, the direction of the left and right wheels can be changed, so that not only forward and backward movements but also cornering movements can be performed smoothly.

2. Since the handle provided on the handle is arranged so as to be located on the cleaner body side, the depth dimension of the entire value electric vacuum cleaner becomes smaller than that of the conventional one.

3. Since both the flat surface and the uneven surface are provided on the wheel and the height difference is provided on both surfaces, the wheel can be used properly depending on the floor surface, folding, carpet and cleaning surface, and good running performance can be obtained.

4. As a means for opening and closing the shield plate, since the lock button and the lock button are alternately operated by operating the push button, it is not necessary to provide the operating force of the operating body and the holding force of the arm in the same elastic body as in the conventional case. The structure is simple and the shield plate can be opened and closed surely.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a longitudinal cross-sectional view of a main part of a side surface of an electric vacuum cleaner of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a rear view thereof.

1 to 3, the cleaner body 1 and the suction port body 2 are connected to each other so that they can be elevated, and the cleaner body 1 sucks dust from the suction port body 2 and the suction hose 3. Electric blower 4, dust collecting bag 5 for collecting sucked dust, and cord reel 6 for storing power cord 6a
And are built in.

The dust bag 5 is made of paper and has a thick paper 5a having an intake port 7 adhered thereto. The paper 5a is attached to the dust collecting chamber 8 inside the cleaner body 1 to attach it. There is. The dust collection chamber 8 is closed by a lid 9 and opened / closed when the dust collection bag 5 is attached / detached.

The lid 9 is provided with an alarm 10 for informing the user that the dust bag 5 is full of dust when the dust bag 5 is full. 10
When the dust becomes full, the amount of air passing through the dust collecting bag 5 becomes extremely small, so that the amount of intake air to the electric blower 4 decreases, the cooling effect of the electric blower 4 decreases, and the temperature rises, which may cause burnout. is there. Therefore, in order to prevent the temperature of the electric blower 4 from rising, it also has a function as an outside air intake 11 that allows the outside air to directly pass through the dust collection chamber 8 and be supplied to the electric blower 4. The alarm device 10 is adapted to operate when the air volume drops below a certain level.

The intake air sucked together with the dust by the electric blower 4 collects the dust in the dust bag 5, and the fine dust passing through the dust bag is caught by the filter 12 provided in the front part of the electric blower 4. The exhaust gas that has been collected and passed through the electric blower 4 is discharged to the outside of the cleaner body 1 through the exhaust port 13 provided on the side surface of the cleaner body 1.

Further, a suction hose (hereinafter referred to as hose) 3 is connected to form an intake passage between the suction port body 2 and the cleaner body 1. By removing the hose 3 from the suction port body 2 and attaching a gap nozzle 14 which is an attached suction tool to the tip of the hose 3, it is possible to clean a cleaning portion which cannot be cleaned by the suction port body 2.

A handle 16 having a handle 15 for operating the electric vacuum cleaner at the time of cleaning is attached to the front surface of the cleaner main body 1 so as to be extendable and contractible. When extending the handle 16, the handle button 17 provided on the cleaner body 1
Press to unlock the handle 16 and release the handle 16
Pull out to the top. When you pull out a certain distance, it will be automatically locked again.

The handle 15 is provided with operation switches 18 for operating the electric vacuum cleaner. The operation switches 18 are provided with a switch 19 for turning off the entire power source, a switch 20 for controlling the rotation of the electric blower for dust suction, and a switch 21 for controlling the rotating brush of the suction port body and the wheel drive. .

A dust collecting meter 23 for notifying the amount of dust collected in the dust collecting bag 5 is provided at the central portion 22 on the front surface of the cleaner body 1. This dust collecting meter 23 is also the above-mentioned alarm 10
Like the vacuum cleaner, it operates by the pressure difference between the outside and the inside of the cleaner. Reference numeral 24 denotes a detection window of the dust collecting meter 23, and the detection window 24 has a piston 25 of the dust collecting meter 23.
If it can be confirmed that the dust collection bag 5 is full. This allows the user to know when to replace the dust bag 5.

Incidentally, the switches 18 provided on the handle 15 and the connecting wire 26 for electrically connecting to the electric components (not shown) inside the cleaner main body 1 and inside the suction port body 2 are the handle 16 described above.
It is provided inside. The connecting wire 26 provided inside the handle 16 is a cord that is wound in a spiral shape so as to expand and contract according to the expansion and contraction of the handle 16, and expands and contracts.

The cord reel 6 built in the upper part of the cleaner body 1 is always urged by a mainspring (not shown) in the direction of winding the power cord 6a. And
At the time of cleaning, pulling with the plug 27 provided at the tip of the power cord 6a causes the reel 28 to rotate and pull out the power cord 6a. At this time reel 2
8 is braked by a brake roller 29 and a spring (not shown), and even if the insertion plug 27 is released, the power cord 6a stops at that position and is not rewound. When the power cord 6a is rewound, the brake of the reel 28 is released by pressing the cord reel button 30, the reel 28 is rotated, and the power cord 6a is wound.

The handle 15 is provided with a cord hook 31 for hanging the power cord 6a so as not to get in the way during cleaning.

Next, the suction port body 2 will be described in detail with reference to FIGS. 4 to 9. FIG. 4 is an internal plan view illustrating in detail the structure of only the suction inlet of the electric vacuum cleaner of the present invention, FIG. 5 is a rear view of the same, FIG. 6 is a longitudinal cross-sectional view of a main part of the same, and FIG. 7 is a planetary gear. The internal plan view of the reduction gear used, FIG. 8 is a self-propelled wheel used for an inlet body, (a) is a front view of a self-propelled wheel,
FIG. 9B is a side view of the self-propelled wheel, FIG. 9A is a side view illustrating the state of the self-propelled wheel during cleaning on the floor and folding, and FIG. 9B is during cleaning on the carpet. FIG. 3 is a side view explaining the state of the self-propelled wheels in FIG.

The suction port body 2 includes an upper case 32 and a lower case 33.
The bottom case 33 is provided with a dust suction opening 34, and small wheels 35, 35 and self-propelled wheels 36, 36 are rotatably supported. The self-propelled wheels 36, 36 are rotated by the rotation of the wheel driving electric motor 37.

A rotary brush 38 is provided facing the dust suction opening 34, and the rotary brush 38 has bearings 3 at both ends.
It is rotatably supported by 9, 39. The rotating brush 38 is rotated by decelerating the rotation of the rotating brush driving electric motor 40 by means of a gear (pinion) 42 formed on the shaft 41 of the electric motor and a belt 43.

The self-propelled wheels 36, 36 and the wheel driving electric motor 37 are rotated by the rotation of the wheel driving electric motor 37 via a reduction gear and a transmission device. The speed reducer 44 directly connected to the electric motor 37 uses a planetary gear 45, and has a sun gear 46 at the center as shown in FIG.
It is composed of a planetary gear 45 around it and an internal gear 47 that meshes with the planetary gear 45.

In the speed reducer 44 comprising the planetary gear 45, the sun gear 46 is the shaft 48 of the wheel driving electric motor 37.
It is directly connected to the (input shaft), and the planetary gear 45 is directly connected to the output shaft 49. Then, there are various types of reduction ratios using the planetary gears 45 depending on the respective applications. For example, when the rotation directions of the input shaft 48 and the output shaft 49 are the same, the internal gear 47 is fixed, or A method of fixing the sun gear 46 is used. A bevel gear A50 is directly connected to the output shaft 49, and the bevel gear A50 is connected to a bevel gear B52 rotatably provided on an axle 51 of the left wheel of the self-propelled wheel 36. In addition, the self-propelled wheels 36,
A differential device 53 called a differential is provided on the axles 51 of the 36. The differential device 53 is composed of two side gears 54 and 55 and two pinions 56 and 57. The two side gears 54 and 55 are a right side gear 54 and a left side gear 55, respectively for the left wheel. It is directly connected to the axle 51 and the right wheel axle 51.

Further, the two pinions 56 and 57 are rotatably mounted with their shafts 58 and 59 supported by bearings 60 and 61, respectively. The bearings 60 and 61 are fixed to a bevel gear B52, and when the bevel gear B52 rotates, the bearing 6
The 0, 61 and the pinions 56, 57 also rotate at the same time. The self-propelled wheels 36 and the axles 51 are coupled by rotatably coupling the self-propelled wheels 36, 36 by fitting a stopper 62 to the axle 51 as shown in FIG. Although one set of reduction gears 44 is provided in the present embodiment, a plurality of reduction gears 44 may be provided depending on the reduction ratio.

In the contact surface 63 with the cleaning surface, the self-propelled wheels 36, 36 have a flat surface 64 on the inner side and an uneven surface 65 on the outer side, which are substantially evenly divided. The diameter of the surface 64 and the convex surface 65a is the flat surface 6
4 is larger (Fig. 8).

The handle 16 provided on the cleaner body 1 is provided so as to be extendable and contractible. However, when the cleaner body 1 is moved back and forth, the handle 16 slightly moves according to the moving direction of the cleaner body 1. It is designed to move. That is, as shown in FIG. 11, the structure of the handle 16 is such that the two micro switches 66, 67 provided in the cleaner body 1 are turned on and off by operating the handle 16 back and forth.
It is supposed to FF. The handle 16 is provided with two protrusions 68 and 69 at positions facing the microswitches 66 and 67.

The two micro switches 66 and 67
For example, as shown in FIG. 11, when the handle 16 is pushed forward and the protrusions 68 and 69 are separated from the microswitches 66 and 67, a normal cross is obtained as shown in FIG.
Conversely, when the handle 16 is pulled to retract the cleaner body, the protrusions 68, 69 cause the microswitches 66, 6 to move.
7 is normally open. Therefore, the cleaner body 1
The self-propelled wheels 36 can be controlled so as to rotate forward when moving forward and reverse when moving backward.

Further, the suction port body 1 is provided with a dust suction opening portion 34 on the lower surface thereof, the dust suction opening portion 34 is formed from the lower surface to the front surface, and a part of the front surface side of the dust suction opening portion 34 is opened and closed. A shielding plate 70 is provided. The shielding plate 70
Is configured to open and close the front side of the dust suction opening 34 by pivoting an arm 71 extending rearward and pivoting about an axis fulcrum 72. And the arm 71
A spring 73 for constantly urging the rear end 71a upward is provided, and a push button 74 for vertically moving the rear end 71a of the arm 71 is provided. The push button 74
A latch assembly 75, which is commercially available from Nifco Co., Ltd. under the name of “embossing latch assembly”, is provided in the lower part of the.

The operation of this latch assembly 75 is shown in FIG.
A detailed description will be given based on. When the push button 74 is pushed, the latch 75a is pushed by the lever 74a of the push button 74 and moves downward, and the operating rod 76 slides in the groove 75b provided in the latch 75a, so that the latch 75a
The actuating rod 76 stops at the upper part of a and the latch 75a is locked. At this time, the claw 74b provided at the tip of the lever 74a of the push button and the claw 75b of the latch are fitted to each other, and the push button 74 is also locked at that position.

By pushing the push button 74 downward in this way, the arm 71 interlocked with the push button 74 is pushed.
The arm 71 rotates around an axis fulcrum 72 and is pushed downward against a spring 73 provided under the arm 71. When the rear end 71a of the arm is lowered, the shield plate 70 provided on the front portion of the arm 71 is raised, and the front portion of the dust suction opening portion 34 of the suction port body 2 is opened.

When it is desired to close the front opening of the dust suction opening 34 by the shielding plate 70 from the above state, the push button 74 is pushed again. When the push button 74 is pushed again, the latch 75a is pushed upward by the spring 77.
As a result, a force to move upward is exerted, so that the actuating rod 76 slides in the groove 75c on the opposite side to which it slid last time, and the actuating rod 76 moves upward. With this, the latch 75
The lock of a is released, and the push button 74 is also pushed up together. When the push button 74 is pushed up, the rear portion of the arm 71, which has been pushed down by the push button 74 until now, is pushed up by the spring 73. That is, when the rear portion of the arm 71 is pushed up, the front shield plate 70 is lowered, and the shield plate 70 closes a part of the dust suction opening.

In the above embodiment, a commercially available latch assembly 7 is used.
5 means have been used, but there is no limitation to this,
The object of the present invention can be achieved as long as the structure is such that the lock is performed by the first pressing operation and the lock is released by the second pressing operation.

The upper case 32 of the suction port body 2 has a fixed case 78 and a detachable lid 79. The lid 79 is attached to the fixed case 78, and the left and right sides provided on the lid 79. The lid 79 can be attached / detached by sliding the slide buttons 80 and 81 to the left and right. By removing the lid 79, the upper portion of the rotary brush 38 provided on the suction port body 2 is opened, and the thread can be entangled with the rotary brush 38 or the rotary brush 38 can be easily attached and detached when the rotary brush 38 is replaced. it can.

The suction port body 2 is connected to the cleaner body 1 by a hose 3. The hose 3 is a commonly used suction hose and has suction pipes 3a, 3b at both ends.
Is provided and the suction pipe 3a is connected to the hose insertion port 82 provided in the suction port body 2, and the other suction pipe 3b is connected 83 to the hose insertion port of the cleaner body. As a result, a ventilation path is formed with the dust suction opening 34 → hose 3 → dust collecting bag 5 → dust collecting chamber 8 → electric blower 4 → exhaust port 13.

Depending on the type of cleaning, the hose 3 may be removed from the suction port body 2 and the suction pipe 3a may be connected to a nozzle 14 for a gap, which is an accessory suction tool, to clean a place where the suction port body 2 cannot clean. You can also do

Next, the operation of the electric vacuum cleaner of the present invention will be described in detail. First, plug 2 for power cord 6a
With 7, the power cord 6a is pulled out from the cord reel 6 and the plug 27 is inserted into an AC100V outlet not shown. Then, the handle button 17 of the handle 16 is pushed to pull out the handle 16 from the cleaner body 1 to a predetermined length, and the handle body 15 is tilted to make it easier to clean, and then the handle 1
The operation is started by operating the switches of the operation unit provided in 5.

The suction port body 2 is connected to the cleaner body 1 by a hose 3. The hose 3 is a commonly used suction hose, which has suction pipes 3a and 3b provided at both ends thereof, and one suction pipe 3a is connected to a hose insertion port 82 provided in the suction port body 2 and the other The suction pipe 3b is connected to the hose insertion port 83 of the cleaner body 1. As a result, a ventilation path is formed with the dust suction opening 34 → hose 3 → dust collecting bag 5 → dust collecting chamber 8 → electric blower 4 → exhaust port 13. By moving the suction port body 2 back and forth on the cleaning surface, dust on the cleaning surface is sucked together with the intake air through the dust suction opening 34, and the dust is collected in the dust collecting bag 5. The exhaust gas is discharged to the outside of the cleaner body 1 through the exhaust port 13 while cooling the electric blower 4.

At this time, if the cleaning surface is a carpet, when the rotating brush 38 is rotated, thread wastes and the like entwined with the carpet are often removed. Further, the self-propelled wheel 36 provided on the suction port body 2 comes into contact with the uneven surface 65 of the sinking wheel in the rug, so that light running performance can be obtained without slipping on the rug. Further, in the case of a floor surface or a fold, contact between the wheel and the cleaning surface is made on the flat surface 64, and light running performance is obtained without damaging the cleaning surface (FIG. 9).

In the operation of the self-propelled wheels 36, it is controlled so as to rotate in accordance with the moving direction of the cleaner body 1.
That is, for example, when the cleaner main body 1 is moved forward, the handle 16 moves within the cleaner main body 1 by a predetermined distance, whereby the micro switch provided in the cleaner main body 1 is normally turned on and the self-propelled wheels 36. Rotates in the normal direction, and the rotation direction matches the moving direction of the cleaner body, and the cleaner body moves lightly.

On the contrary, when the cleaner main body 1 is retracted, the handle 16 is moved within the cleaner main body 1 by a predetermined distance so that the micro switches 66 and 67 provided in the cleaner main body 1 are normal. It becomes open, the self-propelled wheels 36 rotate in the reverse direction, the rotation direction matches the moving direction of the cleaner body 1, and the cleaner body moves lightly.

Here, when the suction port body 2 goes straight, after the rotation of the wheel driving electric motor 37 is reduced by the planetary gear 45,
The bevel gear A50 is rotated. When the bevel gear A50 rotates, the bearings 60 and 61 provided on the bevel gear B52 and the pinions 56 and 57 that are axially fixed to the bearings also rotate.
The rotation of the pinions 56 and 57 causes the pinions 56 and 5 to rotate.
Right side gear 54, left side gear 5 meshing with 7
5 rotates to rotate the self-propelled wheels 36. At this time, when the traveling direction of the axle shaft 51 is at a right angle to the shaft center, the left and right self-propelled wheels 36, 36 rotate at the same rotational speed.

When the suction inlet body 2 is changed to the right during cleaning,
The right self-propelled wheel 36 receives resistance so as to stop the rotation.
Therefore, the rotational force of the pinion 56 is transmitted only to the left side gear 55, the left self-propelled wheel 36 rotates, and the suction port body 2 smoothly bends to the right.

On the contrary, when the suction port body 2 is bent to the left,
Contrary to the above, the self-propelled wheel 36 receives resistance so as to stop the rotation. Therefore, the rotational force of the pinion 57 is transmitted only to the right side gear 54, the right self-propelled wheel 36 rotates, and the suction port body 2 smoothly bends to the left.

During cleaning, when cleaning a corner such as a wall, the suction port body 2 cannot be moved forward by the wall. Therefore, in order to improve the dust absorption at the corners, the shield plate 70 provided at the front portion is opened to increase the intake amount. In order to open the shield plate 70, the push button 74 provided on the upper surface of the suction port body 2 is pressed, so that the arm 7 of the shield plate 70 is opened.
1 is rotated.

When the push button 74 is pressed, the latch 75
a is pushed by the lever 74a of the push button 74 and moves downward, and the actuating rod 76 slides in the groove 75b provided in the latch 75a, and the actuating rod 76 stops at the upper portion of the latch 75a to lock the latch 75a. It At this time, the push button lever 74a is provided with a claw 74b provided at the tip.
And the claw 75b of the latch 75a are fitted to each other and the push button 74
Is also locked in that position. Push button 74 like this
The arm 71 interlocked with the push button 74 is pushed downward by pushing against the spring 73 provided under the arm 71 so that the arm 71 pivots about the pivot point 72 and is pushed downward. When the rear end 71a of the arm is lowered, the shield plate 70 provided on the front portion of the arm 71 is raised, and the front portion of the dust suction opening portion 34 of the suction port body 2 is opened.

When it is desired to close the front opening of the dust suction opening 34 with the shielding plate 70 from the above state, the push button 74 is pressed again. When the push button 74 is pushed again, a force for moving the latch 75 upward is exerted by the spring 77 biased upward, so that the operating rod 7 is pushed.
6 slides in the groove 75c on the opposite side to which it slid last time, and the operating rod 76 moves upward. As a result, the lock of the latch 75 is released and the push button 74 is also pushed up together. When the push button 74 is pushed up, the rear portion of the arm 71, which has been pushed down by the push button 74 until now, is pushed up by the spring 73. That is, when the rear part of the arm 71 is pushed up, the front shield plate 70 is lowered, and the shield plate 70 closes a part of the dust suction opening 34.

Depending on the type of cleaning, there are places where the suction port body 2 of the cleaner body 1 cannot clean. Since the cleaner body 1 is connected to the suction port body 2 by the hose 3, the suction port body 2
When the suction pipe 3a connected to the hose insertion port 82 provided on the is pulled out and the nozzle 14 for gap, which is an accessory suction tool, is connected to this suction pipe 3a, the nozzle 1 for gap
4-> hose 3-> dust bag 5-> dust collection chamber 8-> electric blower 4-> an exhaust passage 13 is formed, and the dust on the cleaning surface is sucked from the gap nozzle 14 together with the intake air. It is collected in the dust bag 5. The exhaust gas is discharged to the outside of the cleaner body 1 through the exhaust port 13 while cooling the electric blower 4. Therefore,
Where the suction inlet 2 cannot be cleaned, it can be cleaned simply by connecting the attached gap nozzle 14 to the hose (FIG. 13).

FIG. 14 is a plan view corresponding to FIG. 4 of the suction port body according to the second embodiment of the present invention. In this suction port body 82,
Large wheels 83, 83 are provided in addition to the self-propelled wheels 36, 36, and the self-propelled wheels 36, 36 rotate the wheel driving electric motor 37 with a reduction gear 44 using a planetary gear 45. The deceleration is transmitted by the belt 84, and the two left and right self-propelled wheels rotate in the same direction in the same direction at 36 and 36. Others are the same as the structure described in detail in the first embodiment, and therefore detailed description will be omitted here. However, since the suction port body 82 is not provided with the differential device 53 as described in the first embodiment, the left and right cornering travelability of the suction port body 82 is inferior.

[0065]

As is apparent from the above description, the present invention has the following effects. According to the first aspect, since the planetary gear is used for the speed reducer, a wide reduction ratio can be obtained, so that a small wheel drive motor can be used. As a result, the speed reducer itself becomes smaller, and the suction port itself becomes smaller and lighter, which improves operability.

Further, by providing a differential device as a means for transmitting the rotational force of the reduction gear to the axles of the traveling wheels,
Left and right cornering of the suction mouth can be done smoothly,
The runnability of the suction mouth is further improved.

According to the second aspect of the present invention, since the handle is disposed so as to be located between the user and the cleaner body, the handle is located on the cleaner body side even in the housed state after completion of cleaning. Like Therefore, since it does not protrude from the main body, the handle does not get in the way when it is stored, and the volume of the packaging case is small when the electric vacuum cleaner is packaged, so that the unit price of packaging is low.

According to the third aspect, since the diameter of the wheel on the flat surface is increased by the convex surface of the flat surface and the uneven surface, the wheel on the flat surface on the floor surface and the folding surface is driven, Above, the wheels sink due to the weight of the vacuum cleaner,
It is driven by the wheels on the uneven surface side. Therefore, one wheel is used properly depending on the cleaning surface, and light running performance can be obtained on any cleaning surface.

According to the fourth aspect, an elastic body for constantly biasing the rear end of the arm of the shield plate upward is provided, and an operating body for vertically moving the rear end of the arm is provided. Since the arm of the arm is locked below the rear end by the operation, and the lock of the rear end of the arm is unlocked by the second operation, it is possible to reliably open and close the shield plate with a light operation force. In addition, it is possible to surely perform the opening / closing operation without causing the shield plate to malfunction due to the impact during use of the vacuum cleaner.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a side surface of an electric vacuum cleaner of the present invention.

FIG. 2 is likewise a front view of the electric vacuum cleaner.

FIG. 3 is likewise a rear view of the electric vacuum cleaner.

FIG. 4 is an internal plan view illustrating in detail the structure of only the suction inlet of the electric vacuum cleaner according to the present invention.

FIG. 5 is likewise a rear view of the suction port body.

FIG. 6 is likewise a longitudinal cross-sectional view of the main part of the side surface of the suction port body.

FIG. 7 is an internal plan view of a speed reducer using a planetary gear.

FIG. 8 is a self-propelled wheel used for a suction port body, (a) is a front view of the self-propelled wheel, and (b) is a side view of the self-propelled wheel.

9 (a) is a side view illustrating the state of the self-propelled wheels during cleaning on the floor surface and the folding table, and FIG. 9 (b) is a side view illustrating the state of the self-propelled wheels during cleaning on the carpet. It is a side view.

FIG. 10A is an exploded perspective view illustrating an opening / closing mechanism of the shielding plate according to the present invention, and FIG. 10B is a cross-sectional view of a main part of the floating latch mechanism.

FIG. 11 is a main part structural diagram of forward / reverse rotation control of a wheel drive motor.

FIG. 12 is likewise a control electric circuit diagram of a wheel driving electric motor.

FIG. 13 is an external side view showing another actual use state of the electric vacuum cleaner of the present invention.

FIG. 14 is an internal plan view of a suction port body corresponding to FIG. 4 showing a second embodiment of the present invention.

FIG. 15 is an external side view of a conventional electric vacuum cleaner.

[Explanation of symbols]

 1 Vacuum Cleaner Main Body 2 Suction Port Body 3 Hose 4 Electric Blower 16 Handle 34 Dust Collection Aperture 36 Self-propelled Wheel 37 Motor for Wheel Drive 38 Rotating Brush 40 Motor for Driving Rotating Brush 44 Reduction Gear 45 Planetary Gear 50 Bevel Gear A 51 Self-propelled Wheel axle 52 Bevel gear B 53 Differential 64 Flat surface 65 Uneven surface 66, 67 Micro switch 68, 69 Projection 70 Shield 71 Arm 74 Push button 75 Latch

Claims (4)

[Claims] 1. A rotary brush driving body for driving a rotary brush and a wheel, comprising a cleaner main body having an electric blower, a dust collection chamber and a handle provided with a handle near an upper portion thereof, and a rotary brush and a wheel. An electric vacuum cleaner in which an electric motor, a wheel driving electric motor, and a speed reducer for decelerating and transmitting the rotations of the both electric motors and a transmission device are incorporated and a suction port body having a dust suction opening on a lower surface is connected so as to be elevated, A planetary gear is used for the speed reducer of the wheel drive electric motor, a differential device is provided at substantially the center of the axle that supports the wheel, and a bevel gear is provided for the transmission means for transmitting the rotation of the speed reducer. An electric vacuum cleaner characterized by. 2. The handle handle is provided so as to be vertically expandable and contractable on one of the front and rear sides of the cleaner body, and the handle is arranged so as to be located on the cleaner body side. The electric vacuum cleaner according to Item 1. 3. An electric vacuum cleaner in which a wheel driven by an electric motor is installed in a suction port body, and a flat surface is provided on one of the inner side and the outer side of the contact surface of the wheel with the cleaning surface, and the other half. An electric vacuum cleaner, characterized in that a concave-convex surface is provided on the surface, and a height difference is provided between the flat surface and the convex surface of the concave-convex surface. 4. An electric vacuum cleaner having an electric blower and a dust collecting chamber built-in, and a cleaner body, and a suction port body having a dust suction opening portion on a lower surface thereof, the dust suction opening portion extending from a lower surface to a front surface. A shielding plate that is formed over the opening and closing the front side of the dust suction opening is provided, and the shielding plate is pivotally supported by an arm extending rearward, and the dust suction opening is caused by a pivotal action about the shaft fulcrum. An elastic body that constantly urges the rear end of the arm upward while opening and closing the front side of the arm is provided, and an operating body that vertically moves the rear end of the arm is provided. An electric vacuum cleaner characterized in that the arm is locked below the rear end and the rear end of the arm is unlocked by a second operation.