JP2021061892A - Vacuum cleaner - Google Patents

Abstract

To provide a vacuum cleaner which has a simple structure, does not damage a cleaned surface, and can decelerate a movement speed of a vacuum cleaner body.SOLUTION: A vacuum cleaner includes: a pair of wheels 3 having an axle 2 for journaling a vacuum cleaner body 1; auxiliary wheels 4a, 4b arranged on a front side and a rear side of the pair of wheels 3; a hose unit to be connected on a front side of the vacuum cleaner body 1; and a suction tool to be connected to the hose unit. The auxiliary wheels 4a, 4b include at least one rotation resistance means 12 for decelerating a speed of the pair of wheels 3. When predetermined force is applied to the auxiliary wheels 4a in a state where the auxiliary wheels 4a are in contact with a cleaned surface, the rotation resistance means 12 is actuated.SELECTED DRAWING: Figure 2

Description

The present invention relates to an electric vacuum cleaner having a pair of wheels in the main body of the electric vacuum cleaner and provided a means for reducing the moving speed of the main body of the electric vacuum cleaner.

Conventionally, there has been known an electric vacuum cleaner provided with a means for reducing the moving speed of the electric vacuum cleaner main body in order to prevent the electric vacuum cleaner main body from colliding with the user (Patent Document 1).

The vacuum cleaner of Patent Document 1 includes a vacuum cleaner body, front wheels provided at the front portion of the vacuum cleaner body, main wheels provided on the left and right sides of the vacuum cleaner body, one end connected to the vacuum cleaner body, and the other end. Movement of the flexible hose connected to the extension tube, the floor suction tool connected to one end of the extension tube, the handle provided on the flexible hose or the extension tube, the main body stationary device, and the vacuum cleaner main body. It has a speed detection unit that detects the speed, and when the vacuum cleaner body is moved by the operation of the handle unit, when the detection value of the speed detection unit exceeds a preset value, the main body stationary device is operated to operate the vacuum cleaner. It is configured to slow down or stop the movement of the main body.

Japanese Patent No. 46355637

However, the main body stationary device of the vacuum cleaner described in Patent Document 1 is provided with a wheel direction changing device, and the main wheels provided on the left and right sides of the vacuum cleaner main body by this wheel direction changing device are not parallel to each other when viewed from above. It was an embodiment of a complicated structure in which the distance between the front of the main wheel and the rear of the main wheel was different depending on the angle.

In another embodiment, the main body stationary device includes a wheel position adjusting mechanism, and the ground contact position of the front wheel or the left and right main wheels in contact with at least one floor surface is shifted upward with respect to the vacuum cleaner main body, so that the bottom of the vacuum cleaner main body Has a structure in which the wheel is in contact with the floor surface, and has a problem that the floor surface may be scratched.

The present invention solves the above-mentioned conventional problems, and provides an electric vacuum cleaner having a simple structure and capable of reducing the moving speed of the electric vacuum cleaner main body without damaging the floor surface. With the goal.

In order to solve the conventional problem, the invention of claim 1 comprises a vacuum cleaner main body including a dust collecting chamber and an electric blower, a pair of wheels provided with an axle that supports the electric vacuum cleaner main body, and the above. Electricity including auxiliary wheels provided on the front side and / or rear side of the pair of wheels, a hose unit connected to the front side of the vacuum cleaner main body, and a suction tool connected to the hose unit. In a vacuum cleaner, the auxiliary wheel is provided with at least one rotation resistance means for reducing the speed of the pair of wheels, and the auxiliary wheel is predetermined to the auxiliary wheel in a state where the auxiliary wheel is in contact with a surface to be cleaned. It is characterized in that the rotation resistance means operates when the force of the above is applied.

In the invention of claim 1, since the auxiliary wheel is provided with the rotation resistance means to reduce the speed of the pair of wheels when a predetermined force is applied to the auxiliary wheel, it is possible to prevent the surface to be cleaned from being damaged. With a simple structure, the speed of a pair of wheels can be reduced to prevent the vacuum cleaner body from colliding with the user.

The invention of claim 2 is characterized in that, in the invention of claim 1, the auxiliary wheel is connected to the main body of the vacuum cleaner via a movable mechanism that cushions the impact. As a result, the impact when the vacuum cleaner main body tilts forward or backward can be mitigated.

The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, when the vacuum cleaner main body is initially moved, the auxiliary wheel is in contact with the surface to be cleaned and the rotation resistance means is not operating. There is. As a result, a large frictional force is not generated between the auxiliary wheel and the surface to be cleaned at the time of initial movement, so that the vacuum cleaner main body can be moved smoothly.

The invention of claim 4 is the invention of any one of claims 1 to 3, in which the auxiliary wheel is cleaned when the vacuum cleaner body is tilted forward or backward when the vacuum cleaner body is accelerating or decelerating. It is characterized in that it comes into contact with a surface and the rotation resistance means is activated. As a result, the rotation resistance means can be activated during acceleration or deceleration of the vacuum cleaner body to reduce the speed of the pair of wheels, and it is possible to further prevent the vacuum cleaner body from colliding with the user. ..

The invention of claim 5 is the invention of any one of claims 1 to 4, wherein the center of gravity of the vacuum cleaner main body is within the width of the auxiliary wheel and the pair of wheels when viewed from the side surface side of the vacuum cleaner main body. It is characterized by being located in. As a result, the tilt angle of the vacuum cleaner body in the front-rear direction can be reduced, the surface to be cleaned is further prevented from being damaged, and the auxiliary wheels are more likely to come into contact with the surface to be cleaned, so that the rotation resistance means is efficient. Can be operated

The invention of claim 6 is the invention of any one of claims 1 to 5, wherein the hose unit is a vacuum cleaner so that the vicinity of the connection portion between the hose unit and the electric vacuum cleaner main body is substantially parallel to the surface to be cleaned. It is characterized by being connected to the main body. As a result, when the user pulls the hose unit diagonally forward and upward, the front side of the vacuum cleaner body rises upward and the rear side falls downward. Therefore, the auxiliary wheels provided on the front side and / or the rear side are provided. Can fulfill its function.

The invention of claim 7 is characterized in that, in any of the inventions of claims 1 to 6, a plurality of auxiliary wheels are provided, and at least one auxiliary wheel is installed on the back side of the vacuum cleaner main body. .. Therefore, even if the vacuum cleaner body is greatly tilted to the rear side, the auxiliary wheels installed on the back side of the vacuum cleaner body come into contact with the surface to be cleaned, and the vacuum cleaner body comes into direct contact with the surface to be cleaned. Since there is no such thing, it is possible to prevent the surface to be cleaned from being damaged.

The invention of claim 8 is characterized in that the pair of wheels protrudes toward the back surface of the vacuum cleaner main body. Therefore, even if the vacuum cleaner body is greatly tilted to the rear side, the pair of wheels protruding toward the back side of the vacuum cleaner body will come into contact with the surface to be cleaned, and the vacuum cleaner body will come into direct contact with the surface to be cleaned. Since there is no need to do so, it is possible to prevent the surface to be cleaned from being damaged.

The invention of the vacuum cleaner according to claim 1 can prevent the surface to be cleaned from being damaged and can prevent the vacuum cleaner body from colliding with the user by reducing the speed of a pair of wheels with a simple structure. .. Further, the invention of claim 2 can alleviate the impact when the vacuum cleaner main body tilts forward or backward. Further, the invention of claim 3 can smoothly move the vacuum cleaner main body. Further, the invention of claim 4 can further prevent the vacuum cleaner body from colliding with the user.

The invention of claim 5 can further prevent damage to the surface to be cleaned. Further, in the invention of claim 6, auxiliary wheels provided on the front side and / or the rear side can fulfill the function. Further, in the inventions of claims 7 and 8, since the vacuum cleaner main body does not come into direct contact with the surface to be cleaned, it is possible to prevent the surface to be cleaned from being damaged.

A perspective view showing the vacuum cleaner according to the present invention. Side view showing the main body of the vacuum cleaner Perspective view showing an auxiliary wheel with a rotation resistance means attached. An exploded perspective view showing a rotation resistance means and an auxiliary wheel Partial sectional view showing an auxiliary wheel in a state where the rotation resistance means is not operating. Partial sectional view showing an auxiliary wheel in a state where the rotation resistance means is operating. Side view showing the main body of the vacuum cleaner during deceleration Side view showing the main body of the vacuum cleaner during acceleration Side view showing another embodiment of the vacuum cleaner body

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

FIG. 1 is a perspective view showing a vacuum cleaner according to the present invention. The outline of the vacuum cleaner according to the present invention will be described below with reference to this figure.

The vacuum cleaner 10 according to the present invention is a pair of wheels 3 provided with a vacuum cleaner main body 1 having a dust collecting chamber for collecting dust and an electric blower, and an axle 2 for supporting the electric vacuum cleaner main body 1. 3 and auxiliary wheels 4a and 4b provided on the front side and the rear side of the pair of wheels 3, 3 and a hose unit 5 connected to the front side of the vacuum cleaner main body 1 so as to communicate with the dust collecting chamber. And a suction tool 6 connected to the hose unit 5.

The hose unit 5 is composed of a hose 5a, a handle pipe 5b provided at the other end of the hose 5a, and an extension pipe 5c whose one end is detachably connected to the handle pipe 5b. A suction tool 6 is connected to the end. Further, the handle pipe 5b is provided with a main body switch 7 for operating the operation of the electric vacuum cleaner main body 1.

Most of the vacuum cleaner main body 1 is covered with a bumper cover 8 having a grip portion 8a formed on the front side. The bumper cover 8 has elasticity and is formed of a curved surface so as to soften the force when it collides with a user or an object. Further, an LED 9 is built in a portion not covered by the bumper cover 8 so as to emit light at startup or when the dust in the dust collection chamber is saturated.

The operation and operation of the vacuum cleaner configured as described above are as follows. Pull out the power cord (not shown) stored in the vacuum cleaner main body 1, insert the plug (not shown) into the indoor outlet (not shown), and press the main body switch 7 provided on the handle pipe 5b. When operated, the operation of the electric blower starts, and the dust on the surface to be cleaned is sucked together with the outside air from the suction tool 6 and reaches the dust collection chamber via the extension pipe 5c, the handle pipe 5b, and the hose 5a, where the suction air is used. The contained dust is collected and the cleaned air is exhausted from an exhaust port (not shown) provided at the rear of the vacuum cleaner main body 1. The user pulls the hose 5a in the direction of the arrow to pull the vacuum cleaner main body 1 and use it.

FIG. 2 is a side view showing the main body of the vacuum cleaner, and line X is a perpendicular line to the surface to be cleaned 11 connecting the center of the axle 2 and the grounding point of the surface 11 to be cleaned of the wheel 3. As shown in FIG. 2, the large-diameter wheels 3 are provided at substantially the center of the vacuum cleaner main body 1 to facilitate tilting back and forth. Further, since the bottom surface of the vacuum cleaner main body 1 is formed so that the distance from the surface to be cleaned 11 increases in the front-rear direction with the line X as a boundary, the auxiliary wheels 4a and 4b are formed even if they are tilted like a pendulum. Does not come into contact with the surface to be cleaned 11 and the bottom surface of the vacuum cleaner main body 1 does not come into contact with the surface to be cleaned. It should be noted that even when the wheel 3 has a small diameter, it is included in the present invention if it can be tilted back and forth.

Further, when stationary or initially moving, as shown in FIG. 2, the front auxiliary wheel 4a and the pair of wheels 3 and 3 come into contact with the surface to be cleaned 11, and the rear rear side installed on the back side of the vacuum cleaner main body 1. The auxiliary wheel 4b is not in contact with the surface to be cleaned 11. By installing the auxiliary wheel 4b on the back side of the vacuum cleaner main body 1, even if the electric vacuum cleaner main body 1 is greatly tilted to the rear side, the auxiliary wheel 4b comes into contact with the surface to be cleaned 11, and the electric vacuum cleaner main body 1 Does not come into direct contact with the surface to be cleaned 11, so that it is possible to prevent the surface 11 to be cleaned from being damaged.

Further, the hose unit 5 is connected to the vacuum cleaner main body 1 so that the vicinity A of the connection portion between the hose unit 5 and the vacuum cleaner main body 1 is substantially parallel to the surface to be cleaned 11. As a result, when the user pulls the hose unit 5 diagonally upward (in the direction of the arrow), the front side of the vacuum cleaner main body 1 rises upward and the rear side falls downward. The auxiliary wheels 4a and 4b provided can perform the function. Furthermore, when the vicinity A of the connection portion between the hose unit 5 and the vacuum cleaner main body 1 is connected to the surface to be cleaned 11 side of the axle 2 of the vacuum cleaner main body 1, the user cleans the hose unit 5. Even when the vacuum cleaner body 1 is pulled substantially parallel to the surface 11, the front side of the vacuum cleaner main body 1 goes up and the rear side goes down. Therefore, the auxiliary wheels 4a and 4b provided on the front side and the rear side have the function. Can be fulfilled.

The front auxiliary wheel 4a includes a rotation resistance means 12 for reducing the speed of the pair of wheels 3 and 3, and the auxiliary wheel 4a is predetermined to the auxiliary wheel 4a in a state where the auxiliary wheel 4a is in contact with the surface to be cleaned 11. When a force is applied, the rotation resistance means 12 operates. As a result, it is possible to prevent the surface to be cleaned 11 from being damaged and to reduce the speed of the pair of wheels 3 and 3 with a simple structure to prevent the vacuum cleaner main body 1 from colliding with the user. Although the auxiliary wheel 4a is in contact with the surface to be cleaned 11 when it is stationary or initially moved, the rotation resistance means 12 does not operate because a predetermined force is not applied. Therefore, when the user moves the vacuum cleaner main body 1 via the hose unit 5, he / she can move it smoothly with a light force without feeling extra resistance. Further, in the present embodiment, the auxiliary wheels 4a and 4b are installed in front of and behind the vacuum cleaner main body 1, but either one of them is included in the present invention, and the rear auxiliary wheels 4b In the case of only, the auxiliary wheel 4b is provided with the rotation resistance means 12.

The front auxiliary wheel 4a is connected to the vacuum cleaner main body 1 via a movable mechanism 13 that cushions the impact. As a result, the impact when the vacuum cleaner main body 1 tilts forward or backward can be alleviated.

FIG. 3A is a perspective view showing an auxiliary wheel in a state where the rotation resistance means is attached, and FIG. 3B is an exploded perspective view showing the rotation resistance means and the auxiliary wheel. The rotation resistance means constituting the present invention will be described with reference to these figures.

The rotation resistance means 12 is composed of a base 15, an upper cylinder 16a, a spring A17, and a lower cylinder 16b, and the auxiliary wheels 4a and 4a are connected to the base 15 via a rotation shaft 14a and a fixing cap 14b. It is fixed so that it can rotate. Further, the upper cylinder 16a, the spring A17, and the lower cylinder 16b are housed in the cylinder housing hole 15b of the base 15. The springs B18 and 18 installed on the rotating shaft 15a formed on the base 15 are members constituting the movable mechanism.

When a predetermined force is applied to the auxiliary wheels 4a and 4a in a state where the auxiliary wheels 4a and 4a are in contact with the surface to be cleaned, the rotation resistance means 12 configured as described above is upper by the spring A17. The cylinder 16a will be pushed upwards and the lower cylinder 16b will be pushed downwards. Then, when the tip of the lower cylinder 16b pushes the rotation shaft 14a, the convex portions 19 and 19 of the auxiliary wheels 4a and 4a come into contact with the side surface of the concave portion 15c of the base 15, and the rotation resistance means operates.

FIG. 4A is a partial cross-sectional view showing an auxiliary wheel in a state where the rotation resistance means is not operating, and FIG. 4B is a partial cross section showing an auxiliary wheel in a state where the rotation resistance means is operating. It is a figure. The auxiliary wheels 4a constituting the vacuum cleaner according to the present invention are connected to the vacuum cleaner main body 1 via a movable mechanism 13 that cushions the impact. The movable mechanism 13 is composed of a rotation shaft 15a of the base 15 and a spring B18. The base 15 is attached to the vacuum cleaner main body 1 via the rotation shaft 15a, and the rotation resistance means of FIG. 4 (b) is operated from the state where the rotation resistance means of FIG. 4 (a) is not operating. In this state, the base 15 rotates counterclockwise around the rotation shaft 15a against the rotational force urging clockwise around the rotation shaft 15a of the spring B18. Move. As a result, the impact on the surface to be cleaned when the vacuum cleaner main body 1 tilts forward is alleviated.

Reference numeral 20 is a pressing member installed on the vacuum cleaner main body 1 side, and the pressing member 20 is a semi-elliptical concave curved surface in which a columnar curved surface 24 formed at the tip of the upper cylinder 16a abuts. 20a is formed. When the rotation resistance means 12 shown in FIG. 4A is not operating, the pressing member 20 has no or weak force to press the upper cylinder 16a downward, so that the base 15 rotates counterclockwise. The spring A17 is in an uncompressed state. On the other hand, in the state where the rotation resistance means 12 shown in FIG. 4B is operating, the pressing member 20 has a strong force to press the upper cylinder 16a downward, so that a columnar shape formed at the tip of the upper cylinder 16a is formed. The curved surface 24 of the above moves diagonally upward and to the right on the drawing while abutting on the semi-elliptical concave curved surface 20a. In this state, the spring A17 is in a compressed state, and when the tip of the lower cylinder 16b pushes the rotating shaft 14a, the convex portions 19 and 19 of the auxiliary wheels 4a and 4a come into contact with the side surface of the concave portion 15c of the base 15. The rotation resistance means is activated.

FIG. 5A is a side view showing the main body of the vacuum cleaner during deceleration, and FIG. 5B is a side view showing the main body of the vacuum cleaner during acceleration. If the rotation resistance means is activated while the vacuum cleaner main body 1 is moving at high speed, the vacuum cleaner main body 1 is greatly tilted forward. Further, even when the auxiliary wheel 4a lands on the surface to be cleaned 11 from the state where the front of the vacuum cleaner main body 1 is floating, the rotation resistance means is activated and the vacuum cleaner main body 1 is greatly tilted forward. In these cases, since it is assumed that the grip portion 8a hits the user's foot, the grip portion 8a is formed of a soft member to reduce the impact force on the foot.

Further, when the user pulls the vacuum cleaner main body 1 in the direction of 45 degrees forward and upward at the time of acceleration shown in FIG. 5 (b), the vacuum cleaner main body 1 is greatly tilted backward. In this case, the auxiliary wheel 4b installed behind the vacuum cleaner main body 1 comes into contact with the surface to be cleaned 11, and the bottom surface of the vacuum cleaner main body 1 does not come into contact with the surface to be cleaned 11. It is possible to prevent the 11 from being damaged. The center of gravity of the vacuum cleaner body 1 is preferably located within the width of the auxiliary wheels 4a or 4b and the pair of wheels 3 and 3 when viewed from the side surface side of the vacuum cleaner body 1. It is optimally located within the width of the rotation shaft of the auxiliary wheel 4a provided with the rotation resistance means and the axle 2 of the pair of wheels 3 and 3. As a result, the tilt angle of the electric vacuum cleaner main body 1 in the front-rear direction can be reduced, the surface to be cleaned 11 can be further prevented from being damaged, and the auxiliary wheels can easily come into contact with the surface to be cleaned. The rotation resistance means can be operated efficiently.

FIG. 6 is a side view showing another embodiment of the vacuum cleaner main body. In the vacuum cleaner main body 21 shown in FIG. 6, a pair of wheels 23 are projected toward the back side of the vacuum cleaner main body 21. As a result, the front side of the vacuum cleaner main body 21 can be lifted and tilted greatly to the rear side, but even when the vacuum cleaner main body 21 is greatly tilted to the rear side, it protrudes to the back side of the vacuum cleaner main body 21. Since the pair of wheels are in contact with the surface to be cleaned 11 and the vacuum cleaner main body 21 does not come into direct contact with the surface to be cleaned 11, it is possible to prevent the surface to be cleaned 11 from being damaged.

The vacuum cleaner according to the present invention is used as a cleaning tool for sucking and removing dust and the like adhering to the surface to be cleaned.

1,21 Vacuum cleaner body 2,22 Axle 3,23 Wheel 4a, 4b Auxiliary wheel 5 Hose unit 5a Hose 5b Handle pipe 5c Extension pipe 6 Suction tool 7 Body switch 8 Bumper cover 8a Grip part 9 LED
10 Vacuum cleaner 11 Cleaned surface 12 Rotation resistance means 13 Movable mechanism 14a Rotating shaft 14b Fixed cap 15 Base 15a Rotating shaft 15b Cylinder accommodating hole 15c Recess 16a Upper cylinder 16b Lower cylinder 17 Spring A
18 Spring B
19 Convex part 20 Pressing member 20a Semi-elliptical concave curved surface 24 Cylindrical curved surface

A Connection area near line X perpendicular line

Claims (8)

A vacuum cleaner body equipped with a dust collector and an electric blower,
A pair of wheels with axles that support the vacuum cleaner body,
Auxiliary wheels provided on the front side and / or rear side of the pair of wheels,
The hose unit connected to the front side of the vacuum cleaner body and
In a vacuum cleaner provided with a suction tool connected to the hose unit.
The auxiliary wheel includes at least one rotational resistance means for reducing the speed of the pair of wheels.
A vacuum cleaner characterized in that the rotation resistance means operates when a predetermined force is applied to the auxiliary wheel in a state where the auxiliary wheel is in contact with the surface to be cleaned. The vacuum cleaner according to claim 1, wherein the auxiliary wheels are connected to the vacuum cleaner main body via a movable mechanism that cushions the impact. At the time of the initial operation of the vacuum cleaner body,
The vacuum cleaner according to claim 1 or 2, wherein the auxiliary wheel is in contact with the surface to be cleaned and the rotation resistance means is not operating. When accelerating or decelerating the vacuum cleaner body
The one according to any one of claims 1 to 3, wherein when the vacuum cleaner body is tilted forward or backward, the auxiliary wheel is in contact with the surface to be cleaned and the rotation resistance means is operating. Vacuum cleaner. Any one of claims 1 to 4, wherein the center of gravity of the vacuum cleaner body is located within the width of the auxiliary wheel and the pair of wheels when viewed from the side surface side of the vacuum cleaner body. Vacuum cleaner as described in the section. Any of claims 1 to 5, wherein the hose unit is connected to the vacuum cleaner body so that the vicinity of the connection portion between the hose unit and the vacuum cleaner body is substantially parallel to the surface to be cleaned. The vacuum cleaner according to item 1. The vacuum cleaner according to any one of claims 1 to 6, further comprising a plurality of auxiliary wheels, wherein at least one auxiliary wheel is installed on the back side of the vacuum cleaner main body. The vacuum cleaner according to any one of claims 1 to 7, wherein the pair of wheels protrudes toward the back surface side of the vacuum cleaner body.

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