JPH0329A - Suction port body for vacuum cleaner - Google Patents

Abstract

PURPOSE:To obtain a satisfactory travel performance so as to enhance the manipulatability and to effectively sweep out dust by using a normal and reverse relay so as to normally rotate a rotary brush motor when a drive wheel motor is normally rotated and to reverse the rotary brush motor when the drive wheel motor is reversed. CONSTITUTION:When a support shaft 47 of a coupling pipe 18 is positioned in the lower front part of the inside of a bearing 48, a coupling member 74 is advanced together with the support shaft 47 so as to forward swing a lever 37 of a relay 71, and accordingly, a movable contact 87 makes contact with stationary contacts 81, 83 while a movable contact 88 making contact with stationary contacts 82, 84 so that both motors 41, 46 are applied with a positive voltage, resulting in rotation of output shafts 42, 67 in an advancing direction. When the support shaft 47 is positioned in the lower rear part of the inside off the bearing 48, the coupling member 74 is moved backward, and accordingly, the movable contact 87 makes contact with stationary contacts 81, 85 while the movable contact 88 makes contact with stationary contacts 82, 86 so that both motors 41, 66 are applied with a negative voltage, resulting in reverse rotation of the output shafts 42, 67. Since the rotating directions of drive wheels 56 and a rotary brush 36 are always coincident with each other, both drive wheels 56 and rotary brush 36 give thrust forces for moving a suction port body 17 either during advance movement or during backward movement, thereby it is possible to obtain a satisfactory travel performance and to enhance the manipulatability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a suction port body of a vacuum cleaner equipped with a rotating brush, and particularly to a self-propelled mechanism of the suction port body.

(Prior art) In the suction port body of a conventional vacuum cleaner, in order to improve the running performance of the suction port body, the electric motor for driving the rotating brush built into the suction port body can be rotated in forward and reverse directions. year,
A method has been adopted in which the direction of rotation of the rotating brush is reversed to match the direction of travel. However, with this conventional method, running is greatly affected by the frictional force between the bristles of the rotating brush used to scrape out dust and the surface being cleaned, and depending on the type of surface being cleaned, stable running may not be achieved. Ta.

Furthermore, upright vacuum cleaners equipped with rotating brushes and driving wheels are known, but in conventional upright vacuum cleaners of this type, the rotating brushes and driving wheels are used to drive the electric motor. A clutch mechanism linked to the handle of the steering wheel reverses the power transmission from the electric motor to the drive wheels according to the direction of travel, and mechanically reverses the direction of rotation of the drive wheels.

Furthermore, as described in Japanese Patent Publication No. 51-28673, in an upright vacuum cleaner, the rotating brush is rotationally driven by an electric motor that rotates in only one direction, which constitutes an electric blower, and the rotating brush is driven by another electric motor. There is also known a structure in which the drive wheel is driven to rotate in forward and reverse directions, and the electric motor for the drive wheels is also reversed in the forward and reverse directions using a forward and reverse reversal switch that is interlocked with a handle of a handle.

However, in any of the above structures of an upright vacuum cleaner, it is good when the rotating brush and drive wheel rotate in the same direction, but when both rotate in opposite directions, the rotating brush reduces running performance. I end up. Also,
Since the rotating brush always rotates in a fixed direction, the hairs on the carpet only lie in one direction, making it impossible to effectively scrape out dust from the carpet. Furthermore, - boat fishing,
Since the rotating direction of the rotating brush is set so that it moves rearward on the lower side, the dust scraping effect is slightly lower when moving backward than when moving forward.

(Problems to be Solved by the Invention) As mentioned above, the suction port body of a conventional vacuum cleaner uses a rotating brush to make the suction port body move by itself, so depending on the type of surface to be cleaned, There was a problem with stable running. In addition, even in upright vacuum cleaners equipped with dedicated driving wheels, conventionally the direction of rotation of the rotating brushes was fixed, which caused the rotating brushes to reduce running performance when reversing and effectively remove dust. There was a problem that I couldn't get rid of it.

The present invention aims to solve these problems, and provides a suction port for a vacuum cleaner that provides good running performance both when moving forward and backward, and which can effectively scrape out dust using a rotating brush. The purpose is to provide the body.

Furthermore, it is an object of the present invention to reduce the weight and size of the suction port body of this vacuum cleaner, and to further improve the running performance.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the suction port body of the vacuum cleaner of the present invention includes a suction port body having a suction port, and a suction port body that faces the suction port. a rotary brush supported so as to be rotatable in reverse; a rotary brush electric motor provided in the suction port body and capable of forward and reverse rotation for driving the rotary brush in forward and reverse rotation;
A driving wheel for driving supported by the suction port main body so as to be rotatable in forward and reverse directions, and a driving wheel electric motor provided in the suction port main body and capable of forward and reverse rotation for driving the drive wheel in forward and reverse rotation, It is equipped with a forward/reverse reversal switch that interlocks both types of motors so that when the drive wheel motor rotates forward, the rotary brush motor rotates forward, and when the drive wheel motor reverses, the rotary brush motor reverses. .

Note that both the rotary brush motor and the driving wheel motor may be DC magnet motors. When the wheel is rotationally driven in the forward direction to cause the suction port main body to travel in the forward direction, the rotating brush electric motor is also rotated in the forward direction by the forward/reverse reversing switch, and the rotating brush is also rotationally driven in the forward direction by this electric motor. On the other hand, when the driving wheel electric motor and the driving wheel are reversed to cause the suction port body to travel in the backward direction, the rotating brush electric motor and the rotating brush are also reversed by the forward/reverse reversal switch. In this way, the direction of rotation of the drive wheel and the direction of rotation of the rotating brush always match, and both the drive wheel and the rotating brush provide propulsive force to the movement of the suction port body, whether moving forward or backward. .

In addition, when a rotating brush scrapes up dust from a carpet, for example, the direction of rotation of the rotating brush is reversed when moving forward and backward, causing the carpet hair that was laid in one direction to move in the opposite direction when the running direction is reversed. By being woken up,
Dust is effectively scraped up.

Furthermore, in the suction port body of the vacuum cleaner according to claim 2, the rotary brush electric motor and the drive wheel electric motor, which account for a large proportion of the total weight, are replaced by DC magnet motors having no field windings, which are lightweight. It is designed to be smaller and more compact, and has improved running performance.

(Example) Hereinafter, the structure of one example of the suction port body of a vacuum cleaner of the present invention will be described based on the drawings.

First, the entire vacuum cleaner will be explained with reference to FIG. 4.

Reference numeral 1 denotes a vacuum cleaner main body, and a front running wheel 2 is rotatably provided at the lower part of the vacuum cleaner main body 1.
Rear running wheels 3 are pivotally mounted on both rear sides. Although not shown, inside the vacuum cleaner body 1, a cord reel and an electric blower are arranged at the rear, and a dust collection chamber with a built-in filter is connected to the intake side of the electric blower. It is sectioned in the front. Further, on the outer surface of the vacuum cleaner main body 1, a connection port facing the dust collection chamber is formed at the front of the top surface, and an exhaust port communicating with the exhaust side of the electric blower is formed at the rear surface. ing.

Reference numeral 6 denotes a hose, and one end of the hose 6 has an insertion tube 7 that is detachably inserted into the connection port of the vacuum cleaner main body 1.
is provided. Further, at the other end of the hose 6,
A grip tube 8 is provided, on which a handle 9 is formed. Furthermore, a switch 10 for controlling the electric blower in the vacuum cleaner main body 1 is provided on the outer surface of the grip tube 8.

Reference numeral 11 denotes an extension tube, and one end of the extension tube 11 is removably fitted into the tip of the grip tube 8.

16 is a suction port body, and this suction port body 16 is a suction port body 1.
7, and a connecting pipe 1 provided at the rear of this suction port body 17.
It consists of 8. The connecting pipe 18 also includes a rotating pipe 19 supported by the suction port main body 17 so as to be vertically rotatable with the left-right direction as the rotating axis direction, and a rotating pipe 19 that is rotatable in the circumferential direction at the rear end of the rotating pipe I9. Bent joint pipe 2 that is movably fitted and connected
0, and this joint pipe 20 is connected to the extension pipe 11.
It is removably fitted and connected to the other end.

Next, the suction port body 16 will be explained in detail with reference to FIGS. 1 to 3.

The suction port body 17 includes a lower body case 21 and an upper body case 22 which are vertically connected. Inside the suction port main body 17, a suction chamber 25 is defined at the front by a front and rear partition wall 24 which has a communication port 23 opened at the center in the left and right direction, and a suction chamber 25 is partitioned on both sides of the communication port 23. Left and right partition walls 26 extending rearward from the
．． 27, a rotating brush motor chamber 28 and a communication chamber 29
and a driving wheel electric motor chamber 30 are arranged side by side in the left and right direction and are respectively partitioned. Further, on the sides of the rotating brush motor chamber 28 and the suction chamber 25, a belt chamber 32 is defined by left and right partition walls 31. Further, the lower surface of the suction chamber 25 is open and serves as a suction port 33.

A rotary brush 36 elongated in the left-right direction is supported in the suction chamber 25 so as to be rotatable in forward and reverse directions with the left-right direction being the axis of rotation. That is, both ends of the rotating brush 36 are supported by brush bearing portions 37 provided on both left and right inner surfaces of the lower main body case 21 via bearings 38, respectively. A plurality of brush bristles 39 are spirally arranged on the outer peripheral surface of the rotating brush 36. Further, a gear-shaped pulley 4G is located within the belt chamber 32 and fixed to one end of the rotating brush 36.

On the other hand, in the rotary brush mold motor chamber 28, a rotary brush electric motor 41 consisting of a DC magnet motor that drives the rotary brush 36 in forward and reverse rotation is disposed. This electric motor 41 has an output shaft 42 by reversing the positive and negative of the applied voltage.
The direction of rotation is reversed. A gear-shaped pulley 43 is fixed to this output shaft 42 protruding into the belt chamber 32, and a timing belt 44 for power transmission is hooked between this pulley 43 and a pulley 40 of the rotating brush 36. has been done.

Further, arm portions 46 are integrally hung on both left and right sides of the front portion of the rotation tube 19 of the connecting tube 18, and a support shaft 47 passes through these arm portions 46 in the left-right direction. Also,
Cylindrical bearings 48 are fixed coaxially to the left and right partition walls 26 and 27 on both sides of the communication chamber 29, respectively.

These bearings 48 are held between the two vehicle body cases 21.22, and a flange portion 49 formed at one end is joined to the inner surface of the left and right partition walls 26.27. The shape of the inside of the bearing 48 is approximately an isosceles triangular shape having a horizontal base on the lower side when viewed from the left and right directions. Then, the support shaft 4 is inserted into these bearings 48.
7 is inserted in the left-right direction, and this support shaft 47 is pivotally supported, and the support shaft 47 having a smaller diameter within the bearing 48 is movable in the front-back direction or the up-down direction.

Further, protrusions 50 are provided on the lower main body case 21 at positions further outside the partition walls 26 and 27 on both sides of the communication chamber 29, and on these protrusions 50, leaf springs 51 which are elastic bodies are mounted. Each end is secured. The front free ends of these leaf springs 51 are pressed against both ends of the support shaft 4 from above, respectively.
7 is a force smaller than the total weight of the suction port body 17 applied to the support shaft 47 by both leaf springs 51.
is constantly biased downward.

Further, the lower surface of the front portion of the rotation tube 19 contacts the upper surface of the drive wheel housing section 52 formed at the rear lower part of the communication chamber 29 of the suction port main body 17 and having an open lower surface, so that the rotation tube 19 rotates downward. movement is now regulated. Further, the communication port 23 and the front opening of the rotation tube 19 are connected to each other by a flexible bellows tube 53 provided in the communication chamber 2g. Note that the joint pipe 20 is connected to the suction port main body 17.
It protrudes backward and upward from.

Reference numeral 56 denotes a relatively long cylindrical driving drive wheel whose axial direction is in the left-right direction.
The drive wheel housing 52 is rotatably supported in the drive wheel housing 52 with the left-right direction as the rotation axis direction. That is, the driving wheel 5
A rotating shaft 58 is fixed through a sleeve portion 57 provided at the center of the rotating shaft 58, and both left and right ends of the rotating shaft 58 are
It is pivotally supported by metal bearings 61, 62, 63 fixed to a support wall 59, 60 formed at the rear of both types of engine chambers 28, 30 of the suction port main body 17.

On the other hand, a driving wheel electric motor 66 made of a DC magnet motor that drives the driving wheel 56 in forward and reverse rotation is disposed at the rear part of the driving wheel electric motor chamber 30 . In this electric motor 66, the rotation direction of an output shaft 67 is reversed by reversing the applied voltage, and the output shaft 67 is coaxially and fixedly connected to the rotation shaft 5g of the drive wheel 56. .

Further, in the front part of the drive wheel motor chamber 30, a normally open motor is provided which controls the rotating brush motor 41 and the drive wheel motor 66 on and off and switches the polarity of the voltage applied to these motors H and 66. A switch 71 for reversing the mold is fixedly supported by a support wall 72 or the like. This switch 7
1 has a lever 73 which is a switch that can swing freely with the vertical direction as the rotation axis direction. Note that this lever 73 is biased to an intermediate position in the longitudinal direction by a spring (not shown).

This lever 73 is interlocked with the support shaft 47 of the connecting pipe 18 via a connecting body 74. The connecting body 74
has elongated holes 75 extending in the front-rear direction at the front and rear, respectively. On the other hand, a pair of protrusions 76 are provided upright on the lower body case 21 and are located between the switch 71 in the suction port body 17 and the leaf spring 51, and these protrusions 76 are inserted into both the elongated holes 75, respectively. The connecting body 7 is slidably inserted.
Reference numeral 4 denotes a suction port body 7, which is slidably supported in the vertical and front-back directions. The support shaft 47 is fixed to the right side of the connecting body 74 when viewed from the front. Furthermore, a groove 77 is formed on the left side of the connecting body 74, reaching the lower surface of the connecting body 74. The lever 73 of the switch 71 is removably engaged with the groove 77 from below only when the support shaft 47 is located below the bearing 48 .

As shown in FIG. 5, the switch 71 has six fixed contacts 81.82.83.84.85.86 and two movable contacts 87.88 integrally provided on the lever 73. have. When the support shaft 47 of the connection pipe 18 is located at the lower front part of the bearing 48, the connection body 74 moves forward together with the support shaft 47, so that the connection body 74 is engaged with the groove 77 of the connection body 74. The lever 73 of the device 71 swings forward, the movable contact 87 contacts the fixed contact 81.83, and the movable contact 88 contacts the fixed contact 82.84 (
(hereinafter referred to as the first closed state), and the two-type motive 41.66
A positive voltage is applied as a power supply voltage to the output shafts 42 and 67, and their output shafts 42 and 67 rotate in the positive direction, that is, in the forward direction. On the other hand, when the support shaft 47 is located at the lower rear inside the bearing 48, the lever 73 swings rearward as the connecting body 74 retreats, and the movable contact 87 contacts the fixed contact 81.85. The movable contact 88 comes into contact with the fixed contacts 82 and 86 (hereinafter referred to as the second closed state), and the electric motor 41.66
A negative voltage is applied to the output shafts 42.67, causing their output shafts 42.67 to rotate in opposite directions. Furthermore, when the support shaft 47 is located at the lower center within the bearing 48, the connecting body 74 and the lever 73 are at the intermediate position in the front-rear direction, and the movable contacts 87 and 88 are both fixed contacts 83, 84, 85, 86, that is, the switch 71 becomes open, and the voltage applied to the motor 41.66 becomes OV.

Furthermore, when the support shaft 47 is at a position above the lower central portion of the bearing 48, the connecting body 74 rises together with the supporting shaft 45, and the lever 73 is disengaged from the groove 77 of the connecting body 74, thereby causing the lever 73 to move upward. 73 is biased by a spring to be located in the middle, and the switch 71 is in an open state.

Next, the electric circuit will be explained with reference to FIG.

The rotary brush motor 41 and the drive wheel motor 66 are connected in parallel between fixed contacts 81 and 82 of the switch 71. Further, a 100V commercial AC power supply 91 is connected to the primary coil of a step-down transformer 93 of the power supply circuit 92,
Both ends of the secondary coil of this transformer 93 are connected to fixed contacts 83.86 of the switch 71 via rectifier diodes 94,95, respectively, and the intermediate point of the secondary coil is connected to the fixed contact of the switch 71. It is connected to contacts 84 and 85. Furthermore, a smoothing capacitor 96 is connected between the cathodes of the diodes 94 and 95 and the intermediate point of the secondary coil. Note that the power supply circuit 9 consisting of the transformer 93, diodes 94, 95, and capacitor 96
The output voltage of 2, that is, the power supply voltage of the motor 41.66 is
It is 45V or less.

The power supply circuit 92 is disposed within the vacuum cleaner main body 1, as shown in FIG.
and the circuit inside the suction port body 16 are connected via a power supply line wired to the hose 6 and the extension pipe 11. Moreover, this electric wire connects the vacuum cleaner main body 1 and the insertion pipe 7,
Connection part between grip tube 8 and extension tube 11 and this extension tube 11
At the connecting portion between the connecting pipe 18 and the connecting pipe 18, a connector (not shown) is used to detachably connect the connecting pipe 18.

Next, the operation of the above embodiment will be explained.

When cleaning, as shown in Figure 4,
The hose 6, the extension pipe 11, and the joint pipe 20 of the suction port body 1G are connected to each other. In this state, the suction port body 17
The suction port 33 of the connecting pipe 18, the extension pipe 11 and the hose 6
It communicates with the dust collection chamber inside the vacuum cleaner main body 1 through the inside. Then, the user holds the handle 9 of the hose 6, positions the suction port main body 17 in front of the body, and places the drive wheel 56 of the suction port main body 17 on the surface to be cleaned, such as a carpet or the floor. Cleaning is performed while mainly moving the suction port main body 17 back and forth.

Note that the cleaner main body 1 has front wheels 2 and rear wheels 3 grounded.

Then, by driving the electric blower inside the vacuum cleaner body 1, the dust sucked together with air from the suction port 33 is transferred to the suction chamber 2.
5, communication port 23, bellows pipe 53, connecting pipe 18, extension pipe 11
The dust is guided through the hose 6 to the dust collection chamber of the cleaner body 1-, and is captured there.

By the way, when the suction port main body 17 is grounded, the load on the connecting pipe 1B side or the force of the user holding the handle 9 pushing the handle 9 downward acts, so that the support of the connecting pipe 18 is The shaft 47 is located at the bottom of the bearing 48 of the suction port body 7 .

When the user further applies a forward pushing force to the handle 9, the support shaft 47 is located at the lower front part within the bearing 48, so that the switch 71 is in the first closed state as described above. Thus, the rotating brush electric motor 41 and the driving wheel electric motor 6
A positive voltage is applied to G, the output shafts 42, 67 thereof rotate in the positive direction, the rotating brush 36 and the drive wheel 56 rotate in the same positive direction, and the suction port body 17 moves forward. On the other hand, when a backward pulling force is applied to the handle 9, the support shaft 47 is located at the lower rear part within the bearing 48, and as described above, the switch 71 enters the second closed state, and the electric motor 41.
A negative voltage is applied to 66, the rotating brush 36 and the drive wheel 56 rotate in the same and opposite direction, and the suction port body 17 retreats.

Furthermore, when the force applied to the handle 9 is reversed from the front to the rear or vice versa, the support shaft 47 is displaced within the bearing 48 from the lower front to the lower rear or vice versa. At that time, when the support shaft 47 is located at the lower center within the bearing 48,
As mentioned above, the switch 71 is in the open state, and the electric motor 41 is in the open state.
．． Once the voltage applied to 66 is cut off, these electric motors 41
．． 66 stops.

This is repeated as the force in the longitudinal direction applied to the suction port main body 17 is reversed, and the rotational direction of the drive wheel 56 matches the direction in which the suction port main body 17 is to move, so that the suction port main body 17 The direction of travel is stable and reversed.

According to the above configuration, the rotation direction of the drive wheel 56 and the rotation direction of the rotary brush 36 always match, and both the drive wheel 56 and the rotary brush 36 are connected to the suction port body 17 whether moving forward or backward. Since the driving force is given to the running, good running performance can be obtained.

Therefore, the operability of the travel stop is also improved. Of course, the presence of the drive wheels 56 allows stable running regardless of the type of surface to be cleaned.

Further, since the rotation direction of the rotating brush 3G is reversed when moving forward and moving backward, when the rotating brush 36 scrapes up dust from a carpet, for example, the hairs of the carpet that have been laid down in the direction of the position due to the forward movement are moved. Dust is effectively scraped up by being raised in the opposite direction as the direction is reversed.

Furthermore, as described above, since the rotational direction of the drive wheels 56 and the rotational direction of the rotary brush 36 always match, the same brushing effect can be obtained both when moving forward and when moving backward.

Also, during cleaning, when the suction port body 17 is lifted and suspended in the air, the load on the suction port body 17 side causes
This suction port body 17 is lowered with respect to the connecting pipe 18, and the support shaft 47 of this connecting pipe 18 is relatively displaced to the upper apex within the bearing 48 of the suction port body 17.

As described above, by this movement of the support shaft 47, the engagement between the coupling body 74 and the lever 73 of the switch 71 is released, and the lever 73 is displaced to the intermediate position by the spring, and the switch 71 is moved. It becomes an open state, the voltage applied to the electric motor 41.66 is cut off, and the electric motor 41.66 and the rotating brush 3
6 and the drive wheels 56 are in a constantly stopped state.

That is, when the rotating brush 36 and the drive wheel 56 do not need to rotate, such as when the suction port body 17 is lifted during cleaning, they stop, improving safety.

Note that when the suction port body 17 is grounded again, the bearing 48
The support shaft 47, which had been moved to the inner upper apex, moves downward again, and the lever 73 of the switch 71 is re-engaged with the groove 77 of the connecting body 74 that is integral with the support shaft 47.

By the way, in the suction port body I6 provided with the two electric motors 41 and 66 as described above, reducing the weight of this suction port body 16 becomes a problem. However, according to the above configuration, both the rotary brush motor 3G and the drive wheel motor 66, which account for most of the weight of the entire suction rotor body 16, are small and do not have field windings. Since a lightweight DC magnet motor is used, the suction port body 16 can also be made lighter and smaller. Therefore, running performance and operability are further improved.

Also, since both layer motivators 41 and 56 are driven by the same voltage,
The power supply circuit 92 and the power supply line for power transmission from the vacuum cleaner main body 1 to the suction port body 16 can be shared, and the structure can be simplified.

Furthermore, since the power supply voltage of the motor 41.66 is set to 45V or less, the standards required for safety under the Electrical Appliance and Materials Control Law are relaxed, the insulation distance can be minimized, and the power supply line etc. can be made lighter and smaller. .

By the way, the power supply circuit 9 having a step-down transformer 93, etc.
2 is heavy. However, according to the above configuration, since the power supply circuit 92 is disposed outside the suction port body 16, the suction port body 16 can be made smaller and lighter. and,
By arranging the power supply circuit 92 especially in the cleaner body 1, the running performance and operability of the suction port body 16 are further improved. A flexible hose 6 is connected between the vacuum cleaner body 1 which is grounded on the surface to be cleaned and a grip tube 8 with a handle 9.
This is because there is.

Furthermore, by disposing the power supply circuit 92 in the vacuum cleaner main body 1, a reduced voltage is applied to the power supply lines of the hose 6, extension pipe 11, and suction port body 16, so as explained earlier, , the insulation distance can be reduced, and not only the suction port body 16 but also the hose 6 and the extension pipe 11 can be made smaller and lighter.

In the above embodiment, both the rotary brush motor 41 and the driving wheel motor 66 are DC magnet motors, but only one of them may be a DC magnet motor. Further, as the electric motor 41.66 capable of forward and reverse rotation, an ultrasonic motor or the like can be used in addition to a DC magnet motor.

Ultrasonic motors are advantageous for reduced noise and increased torque.

〔Effect of the invention〕

According to the present invention, the following effects can be obtained.

In the vacuum cleaner suction port body of claim 1, the forward/reverse reversal switch rotates the rotating brush motor in the normal direction when the drive wheel motor rotates in the normal direction, and also rotates the rotating brush motor in the normal direction when the drive wheel motor rotates in the reverse direction. Since the rotation is reversed, the rotating brush of the suction port body does not interfere with driving, for example when reversing, and good driving performance is obtained whether moving forward or backward, and operability for driving is also improved. Further, by reversing the rotating brush, dust can be effectively scraped out from a carpet, etc., and the brushing effect is improved.

Furthermore, in the suction port body of the vacuum cleaner according to claim 2, both the rotary brush electric motor and the drive wheel electric motor are DC magnet motors, so that the weight and size can be reduced, and the running performance and operability are further improved. do.

[Brief explanation of drawings]

FIG. 1 is a sectional view in the plane direction showing one embodiment of the suction port body of the vacuum cleaner of the present invention, FIG. 2 is a sectional view in the side direction of the same, and FIG.
The figure is a front sectional view of the same, FIG. 4 is a side view of the entire vacuum cleaner, and FIG. 5 is a circuit diagram of the same. 16... Suction port body, 17... Suction port body, 33... Suction port, 36... Rotating brush, 41... Electric motor for rotating brush, 56... Drive wheel for traveling, 66... Electric motor for drive wheel. 7
1. Switch for forward/reverse reversal.

Claims (2)

[Claims] (1) a suction port body having a suction port; a rotating brush supported by the suction port body facing the suction port so as to freely rotate in forward and reverse directions; and a rotating brush provided on the suction port body that drives the rotating brush in forward and reverse rotation. a rotating brush electric motor capable of forward and reverse rotation; a driving drive wheel supported on the suction port body for forward and reverse rotation; and a forward and reverse rotation motor provided on the suction port body for driving the drive wheel in forward and reverse rotations. and a forward/reverse reversal switch that rotates the rotating brush motor in the normal direction when the driving wheel motor rotates in the normal direction and reverses the rotating brush motor in the reverse direction when the driving wheel motor rotates in the reverse direction. A suction port body for a vacuum cleaner characterized by: (2) The suction port body for a vacuum cleaner according to claim 1, wherein both the rotary brush motor and the driving wheel motor are DC magnet motors.