JPH084933Y2 - Electric vacuum cleaner - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to an electric vacuum cleaner capable of smoothly passing over a protrusion such as a sill when moving a floor or the like.

(Prior Art) Conventionally, in order to prevent damage to the sill or the cleaner body when the electric vacuum cleaner moves over obstacles such as the sill, the front end of the cleaner body is caught on the sill or the like. For example, as shown in FIG. 7, there is known a structure in which a shock absorber 3 is attached to a lower portion of a front surface of a case body 2 of a cleaner body 1 so as to absorb an impact.

However, in the structure shown in FIG. 7 in which the cushion body 3 is attached to the lower front portion of the case body 2 of the cleaner body 1, when the cleaner body 1 passes over the threshold 4, the cushion body 3 is made of an elastic material such as rubber. When it is formed, there is a problem that the vacuum cleaner body 1 is hard to get over the sill 4 due to the friction between the elastic material and the sill 4 when the sill 4 is contacted.

On the other hand, as disclosed in, for example, Japanese Patent Laid-Open No. 60-210227, there is known a configuration in which wheels are projected from the main body of the vacuum cleaner so as to easily get over obstacles such as a sill.

However, in the one described in JP-A-60-210227, in order to smoothly get over obstacles such as thresholds, the diameter of the wheels protruding from the cleaner body must be increased, There is a problem that the vacuum cleaner becomes large.

(Problems to be Solved by the Invention) As described above, in the conventional electric vacuum cleaner having the cushioning body shown in FIG. 7, it is not possible to smoothly get over the obstacle due to the friction between the sill and the cushioning body. Further, the conventional electric vacuum cleaner disclosed in Japanese Patent Laid-Open No. 60-210227 has a problem that it is upsized in order to smoothly overcome obstacles such as thresholds.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a small-sized vacuum cleaner that can smoothly overcome an obstacle such as a sill or damage to the cleaner body when the cleaner body is moved.

(Means for Solving the Problem) An electric vacuum cleaner according to claim 1, wherein the electric vacuum cleaner has an electric blower chamber containing a dust collecting chamber and an electric blower, and a moving wheel is provided at a lower portion thereof; A movable body provided at a lower portion of the front surface of the main body, wherein the movable body has a plurality of rollers whose central axes are located above and below and along the outer peripheral surfaces of the rollers protruding from the front surface of the cleaner body. And a movable surface that is formed and has a rotatable elasticity that is positioned rearward downward.

A vacuum cleaner according to a second aspect is the vacuum cleaner according to the first aspect, wherein the movable surface of the movable body is driven by a drive motor.

(Operation) In the vacuum cleaner according to claim 1, when moving the floor of the vacuum cleaner main body with the moving wheels, when an obstacle such as a sill is brought into contact with a movable body provided at a lower portion of the front surface of the vacuum cleaner, the center of each The shaft has a plurality of rollers positioned vertically and protrudes from the front surface of the cleaner body, and the movable surface of the movable body located rearward downward along the outer peripheral surfaces of the plurality of rollers is rotated by the friction due to elasticity. The vacuum cleaner body smoothly overcomes obstacles such as thresholds without increasing the size, and absorbs impact by the elasticity of the movable surface.

A vacuum cleaner according to a second aspect of the present invention is the vacuum cleaner according to the first aspect, wherein the cleaner body positively and smoothly crosses obstacles by driving the movable surface of the movable body with a drive motor.

(Embodiment) An embodiment of the vacuum cleaner of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 5 denotes a cleaner body, which is composed of a body case 7 and a lid body 6 that opens and closes an upper opening of the body case 7, and is not shown inside the cleaner body 5. A dust collection chamber to which a filter is detachably attached is formed, and an electric blower is built in.

A swivel wheel 8 is provided on the lower front side of the cleaner body 5, and moving wheels 9 are provided on both sides of the rear part. Further, an insertion port body 12 having a hose insertion port portion 11 communicating with the dust collection chamber is provided on the upper portion of the front surface 10 of the cleaner body 5.

Further, the front surface 10 of the cleaner body 5 is formed as an inclined surface which is inclined downward, and the movable body 14 is inserted into the front surface 10 of the insertion body 12.
Is located below the front surface of the cleaner body 5 and slightly protrudes from the front surface 10. This movable body 14 is the front surface 10 of the cleaner body 5.
The rear portion is disposed in the concave portion 13 formed in 1., and the movable body 14 is composed of a pair of rollers 15 and 16 and an endless belt 17 that forms a movable surface bridged between the rollers 15 and 16.

The pair of rollers 15 and 16 of the movable body 14 have their central axes located vertically, that is, the shafts 18 and 19 projecting at both ends in the axial direction respectively, and the rollers 15 and 16 are substantially parallel to each other in the vertical direction in the recessed portion 13. Each is rotatably mounted on the shaft. Further, the shaft portion 18 of the upper roller 15 is integrally fixed, and the shaft portion 19 of the lower roller 16 is loosely fitted so that the shaft portion 19 and the roller 16 rotate relative to each other. Further, the endless belt 17 laid between the rollers 15 and 16 is made of rubber or the like having an inner belt 17a and an outer periphery of the inner belt 17a bonded with an adhesive or the like, and having a large number of ridges 20 in the surface width direction. It is composed of an outer belt 17b made of an elastic body, and the outer surface of the endless belt 17 is projected slightly outward from the lower portion of the front surface 10 of the cleaner body 5, and is positioned rearward downward. Has become.

The endless belt 17 can also be formed as an integral elastic belt.

Further, on the inner surface of the front surface 10 of the main body case 7 of the cleaner main body 5, as shown in FIG. 2, a drive motor 23 is fixedly supported by support members 21 and 22. The rotary shaft 24 of the drive motor 23 has a recess 13 on the front surface 10 of the cleaner body 5.
The shaft portion 18 of the upper roller 15 protruding more freely along the rear surface side of the front surface 10 is directly connected.

Further, both ends of the shaft portion 19 in which the lower roller 16 is rotatably fitted are protruded from the recess 13 along the inner surface side of the front surface 10 as shown in FIG. Both ends of the shaft portion 19 are mounted on bearing members 25 and 26 fixed to the inner surface of the front surface 10 so as to be movable in the front-rear direction and not to rotate. Further, one of the bearing members 25 has a drive switch for operating the drive motor 23 by contacting the shaft portion 19 when the shaft portion 19 moves backward when the lower portion of the endless belt 17 hits an obstacle and is prevented from moving forward. An actuator 27 of is provided.

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

Hold the hose and pull the vacuum cleaner body 5 to move the wheel 9 for movement.
In the case of moving with a vacuum cleaner, when the lower part of the front surface collides with an obstacle such as a sill as shown in FIG.
The lower part of the endless belt 17 of the movable body 14 slightly protruding from 10,
The shaft portion 19 of the lower roller 16 is slid inward of the front surface 10 by being pushed by an obstacle, and the actuator 27 of the drive switch provided on the bearing member 25 is pushed to drive the drive motor 23. Then, the upper roller 15 directly connected to the drive motor 23 by the shaft portion 18 rotates to rotate the endless belt 17, and the protrusion 20 having elasticity made of an elastic body on the surface of the endless belt 17 causes the endless belt 17 to move as shown in FIG. Get over the obstacles as you progress.

At this time, the lower roller 16 loosely fitted to the shaft portion 19 rotates along with the endless belt 17.

After overcoming the obstacle, the endless belt 17 releases the pressing force from the obstacle, the position of the lower shaft portion 19 is separated from the actuator 27 of the drive switch, and the drive motor 23 stops.

 Next, another embodiment will be described with reference to FIG.

In this embodiment, the drive switch for actuating the movable body 14 is opened and closed by the pulling force applied to the hose.

In FIG. 4, the hose connected to the dust collection chamber in the cleaner body 5 is connected to the insertion port 12 provided on the front surface 10 of the cleaner body 5.
The hose insertion opening 11 into which the connection opening 28 at the base of 34 is detachably inserted is opened.

A groove 29, which is a U-shaped cutout, is formed continuously on one side of the hose insertion portion 11, and a stopper opening in a rectangular shape is formed on the end surface portion 30 of the inner peripheral surface of the groove 29. Insertion slot
31 is formed, and a concave portion 32 is formed on the inner peripheral surface of the stopper insertion opening 31 on the traveling direction side of the cleaner body 5, and the concave portion 32 is formed.
The actuator 27 of the drive switch of the drive motor 23 projects from the inside of the insertion port 12 so as to face the opening of the drive switch 23, and the tip of the actuator 27 of the drive switch faces the opening of the recess 32 and the push plate 33. Is fixed.

Further, on the peripheral surface of the connection port body 28 of the hose 34, a projection portion 35 that is fitted into the groove portion 29 of the hose insertion portion 11 is formed, and protrudes from this projection portion 35 and is fitted into the stopper insertion opening 31. A stopper portion 37 having a tapered surface 36 at the tip to be attached is provided so as to project. The stopper portion 37 is biased by a spring in the projecting direction, and the connection opening body 28 is provided with a release mechanism having a push button or the like for compressing the spring when the stopper portion 37 escapes from the stopper insertion opening 31.

When connecting the hose 34, the connecting portion 28 is inserted into the hose insertion portion 11 and the stopper portion 37 is compressed by the taper surface 36 of the stopper portion 37.
When 37 is fitted into the stopper insertion port 31, the hose insertion port
The connection port body 28 is engaged with 11 so as not to escape.

At this time, the front end surface 37a of the stopper portion 37 does not push the actuator 27 of the drive switch.

Next, the hose 34 is grasped and moved while pulling the cleaner body 5, and when the front end surface of the cleaner body 5 comes into contact with an obstacle such as a sill, the hose 34 is further pulled, and a load larger than the set load is applied to the hose. When a force is applied, an unreasonable force is applied to the connection port body 28, and this stopper portion 37 is inserted into the stopper insertion port 31.
The front end surface 37a of the stopper portion 37 tilts forward in the
The actuator 27 of the drive switch is pushed via 3 to drive the drive motor 23.

Then, after the endless belt 17 rotates and the cleaner body 5 has passed over the obstacle and the pulling force of the hose 34 loosens, the stopper portion 37 pressing the drive switch actuator 27 returns to the original position and the drive motor 23. Stops.

In addition, in the embodiment shown in FIGS. 1 to 3 and the embodiment shown in FIG. 4, the structure in which the switch is provided in the cleaner body 5 has been described, but as shown in FIG. An operation button 27a for the drive switch of the drive motor 23 may be provided on the connected hose 34 and the suction pipe connecting portion 38 connecting the hose 34 and the suction pipe.

When the cleaner body 5 comes into contact with an obstacle, the drive switch is closed to drive the drive motor 23, and when the cleaner body 5 gets over the obstacle, the drive switch is turned off to stop the drive motor 23.

According to this embodiment, the suction pipe can be held by the suction pipe connecting portion 38 and the drive switch can be operated at hand.

Further, as shown in FIGS. 5 and 6, for example, a switch of the drive motor 23 is closed at the front end of the lower surface of the insertion port body 12 located above the movable body 14 mounted on the front surface 10 of the cleaner body 5. It is also possible to provide a sensor 39 that operates.

Then, when the sensor 39 detects a step of an obstacle such as a threshold, the switch is closed, the drive motor 23 is driven, and the movable body 14 is driven.

Further, the movable body 14 has been described by being constituted by the rollers 15 and 16 and the endless belt 17 laid on the rollers 15 and 16, but the movable body 14 is constituted by a large number of rotating rollers, and The outer peripheral surface may be a movable surface having elasticity.

Further, the structure in which the movable body 14 is driven by the drive motor 23 has been described, but it is not always necessary to drive the movable body 14 by the drive motor 23, and a structure in which the movable body 14 can be freely moved can be used.

(Effect of the Invention) According to the electric vacuum cleaner of claim 1, when the cleaner main body hits an obstacle such as a sill, the movable surface of the elastic movable body absorbs impact force by rotation and elasticity. ,
Each center axis has a plurality of rollers located above and below, and the movable surface of the movable body, which protrudes from the front surface of the cleaner body and is located rearward downward along the outer peripheral surface of the plurality of rollers, follows the obstacle. Since it moves while rotating, the vacuum cleaner body can smoothly overcome obstacles without increasing friction resistance.

According to the electric vacuum cleaner of the second aspect, in addition to the electric vacuum cleaner of the first aspect, since the movable surface of the movable body is driven by the drive motor, the obstacle can be passed over smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric vacuum cleaner showing an embodiment of the present invention,
FIG. 2 is a perspective view of the movable body and the drive motor portion of the same as above, FIG. 3 is a perspective view of the drive switch portion of the same above, and FIG. 4 is a perspective view in which the insertion port body and the connection port body are separated from each other showing the other embodiment. Figure, fifth
FIG. 6 and FIG. 6 are side views of a vacuum cleaner showing still another embodiment, and FIG. 7 is a side view of a conventional vacuum cleaner. 5 ... Vacuum cleaner body, 9 ... Moving wheel, 14 ... Movable body,
15,16 …… Roller, 17 …… Endless belt that forms a movable surface, 23 …… Drive motor.

Claims (2)

[Scope of utility model registration request] 1. A cleaner body having an electric blower chamber containing a dust collecting chamber and an electric blower, and a moving wheel provided at a lower portion thereof,
A movable body is provided at a lower part of the front surface of the cleaner body, wherein the movable body has a plurality of rollers whose central axes are located above and below, and an outer peripheral surface of the rollers protruding from the front surface of the cleaner body. An electric vacuum cleaner having a movable surface having a rotatable elasticity, which is formed along with and is located rearward downward. 2. The vacuum cleaner according to claim 1, wherein the movable surface of the movable body is driven by a drive motor.