JP3146700B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general household vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 58-118726 is disclosed in FIG.
Reference numeral 1 denotes a main body having a built-in electric blower 2 and the like. A dust collecting box 4 having a dust collecting bag 3 built therein is detachably fixed to a front portion thereof, and a moving wheel is provided on a rear side surface. 5 is provided on the front bottom surface with a movable caster U6 rotatable in the horizontal direction. A connection pipe 9 attached to an end of a hose 8 is provided at an intake hole 7 provided in front of the dust collection box 4, and an extension pipe 10 and a floor nozzle 11 are provided at the other end of the hose 8. Further, the dust collecting chamber section 12 and the driving chamber section 13 are configured to be horizontal, and the bottom surface of the lower main body 1 is not provided with a floor protection member or the like.

[0003]

However, in the above-described vacuum cleaner, the user pulls the cleaner body while cleaning, and moves the caster U6 as shown in FIG. Power cord 10 is sandwiched between
The phenomenon that the rotation of the caster U6 attached to the vacuum cleaner main body was obstructed occurred. As shown in FIG. 15, the cause of the difficulty of the conventional vacuum cleaner getting over the power cord is the structure of a front caster and a rear roller. It was located below. Thus, when the main body of the electric vacuum cleaner is pulled forward, a rotational force D is applied to the caster roller 6 '. Therefore, when the caster roller 6 'comes into contact with the power supply cord 10, the power supply cord 10 is involved. However, since the surface of the power cord is formed of a resin having a large friction coefficient such as vinyl chloride, the main body is stopped by being locked between the floor surface and the caster rollers. In addition, when riding over the step a, the bottom surface of the dust collecting box 4 and the moving caster U6 hit the step first, which damages the threshold and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to improve the possibility of being damaged when passing through a step such as a sill, and of improving the power supply cord of a vacuum cleaner.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a front roller and a rear caster so that electric cleaning is performed with a front roller shaft as a fulcrum. The machine body can move upward. By forming the distance between the flange on the lower surface of the caster cover and the floor smaller than the diameter of the power cord of the vacuum cleaner, the power cord can be cooled.
When riding the vehicle, the power cord is sandwiched between the floor and the caster cover to prevent the power cord from directly contacting the caster roller.
This prevents the power cord from getting stuck between the floor and the floor. Also, when the caster cover rides on the power cord, a force is applied to push the rear of the vacuum cleaner body upward, so that the main body rotates about the axis of the roller, and the caster covers.
Since the roller portion also moves upward, the power cord can be easily discharged backward.

As a second means, by attaching a sliding member to the bottom surface of the caster cover, when the power cord comes into contact with the caster cover, it moves while sliding on the caster cover. By making it easier, the recoil when the caster cover rides on the power cord is more likely to be applied to the main body, so that the power cord can be easily traversed.

As a third means, an auxiliary roller is held at a part of the front of the caster cover so that the power supply can be controlled.
When the caster cover moves on the roller and comes into contact with the auxiliary roller, the main body of the vacuum cleaner is lifted by the auxiliary roller, so that the power cord is easily pulled out.

As a fourth means , an anchor-shaped plate is attached to a part of the front of the caster cover, so that the power supply cover is provided.
When the door moves along the slope of the anchor-shaped plate and reaches the lowermost end, the lower end of the vacuum cleaner main body is lifted and tilted forward. At the next moment, the power supply code slides on the opposite slope and moves, so that the power supply code comes off the caster cover.

As a fifth means for preventing the floor from being damaged, a roller or a floor protective material such as a brushed cloth is attached to the bottom of the lower body so that electric power can be supplied when the vehicle goes over a convex part such as a threshold. This prevents the floor surface from being damaged by the bottom surface of the vacuum cleaner.

A sixth means is to prevent the floor surface from being damaged by applying electrostatic flocking to the bottom surface of the lower body.

A seventh means is to reduce the area of the sliding member by providing a recess in a part of the lower main body so that the front surface of the main body and the caster portion come into contact with the floor surface.

[0012]

According to the present invention, the main body of the vacuum cleaner is constituted by a front roller and a rear caster so that the rear portion of the main body of the vacuum cleaner can be pivoted upward about the axis. . Further, by forming the distance between the flange of the caster cover of the caster U and the floor surface smaller than the diameter of the power supply cord of the vacuum cleaner, first of all, when riding over the power supply cord, The flange part runs over the power cord,
By reliably moving over, the power cord is sandwiched between the caster roller and the floor, thereby eliminating the adverse effect of impairing the traveling performance of the vacuum cleaner main body.

A power supply cord having a high coefficient of friction can be provided by attaching a sliding member to the flange portion so that the caster cover can easily slide on the power supply cord.
It is intended to prevent the roller from getting caught between the roller and the floor surface and to improve the rideability.

By attaching an auxiliary roller to the side surface of the caster cover, the power supply cord is prevented from biting between the floor surface and the caster roller. Further, by attaching the anchor-shaped plate member according to the fourth method, the caster cover U attached to the rear portion of the main body is lifted when riding on the cord, so that the power cord can be easily removed from the main body of the vacuum cleaner. It is.

By using a brushed cloth or the like as a floor member for preventing a floor from being damaged, it is possible to reduce an impact when the floor comes into contact with the floor.

Further, a cushioning member formed by electrostatic flocking on the part of the lower body of the vacuum cleaner, is to reduce the impact.

Moreover, by the recess portions of the lower body, casters - by into contact with the part, it is intended to achieve reduction of the protective member.

[0018]

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 6, reference numeral 21 denotes a lower body, which has an electric blower chamber 23 having a built-in electric blower 22 at the rear inside, a dust collecting chamber 25 having a dust collecting bag 24 built in the front, and a lid 26. Thereby, the dust collection chamber 25 is rotatably covered from above. The roller 27 is disposed so that the rotation center is located on both sides behind the dust collecting chamber 25 in front of the center of gravity of the electric blower 22, and is a horizontally movable caster behind the electric blower 22. U28 is provided.

At the front of the dust collecting chamber 25, there is provided an air inlet 35 for communicating the dust collecting bag 24 disposed in the dust collecting chamber 25 with a connection pipe 34 provided at the end of the hose 29.
The extension pipe 32 and the floor nozzle 33 communicate with each other via a tip pipe 31 integrally formed with a handle 30 provided at the other end of the pipe 9.

The mounting angle .gamma. Of the connecting pipe 34 fitted in the suction hole 35 is set upward in the range of 20 to 30 degrees with respect to the floor surface with the vicinity of the rotation center of the roller 27 as a fulcrum. Is set to

The caster U28 includes a caster roller.
Raster 36, caster cover 37 for holding it, and caster shaft 3 for rotatably supporting caster cover 37
8 is supported on a caster mounting plate 39, which is fixed to the lower body 21 with screws 40. Reference numeral 41 denotes a ferrule for fixing the caster shaft 38 and the caster mounting plate 39.

In the second method, a sliding member 42 is attached to the bottom surface of the caster cover 37, and the caster cover 37 is attached.
Is improved in slidability.

In the third method, a roller 44 is pivotally supported in front of a flange 43 on the side surface of the caster cover 37.

In a fourth method, an anchor-shaped plate is rotatably supported on a flange 43 on the side surface of the caster cover 37.

In each of the first to fourth methods, the distances A, aB and C from the floor surface 46 to the caster cover 37 are formed smaller than the diameter B of the power supply cord 47.

The operation of the present invention will be described below. In the present invention, a configuration of a front roller and a rear caster is used. Therefore, when the hose 29 attached to the connection pipe 34 is pulled, the caster cover-3 is attached to the upper surface of the power supply cord 47.
When the flange 41 provided on 7 comes in contact with the power supply cord 47, the slope of the caster cover 37 moves so as to ride on the power supply cord, and the reaction causes the main body of the vacuum cleaner to move the roller center 27 '. The fulcrum pivots as shown by arrow E, and the power cord 4
7 moves between the floor F and the caster cover 37. At this time, since it does not get caught between the caster rollers 36, the power cord 47 does not lock between the caster rollers 36 and the floor surface F as in the prior art. This makes it easy to jump over the power supply code 47. At this time, the main body has an angle of 20 to 30 degrees on the front side, and the weight of the connection pipe 34 makes it easy for the main body to fall forward and to float up rearward, so that the power cord 47 can be more easily discharged backward. ing. Therefore, it is possible to get over the smooth without being caught.

In the second method, since the sliding member 42 is attached to the flange portion 43, the power supply cord 47 is
Since it becomes difficult to bite between the caster 6 and the caster cover 37, the rideability is further improved.

In the third method, the front surface of the flange 43 of the caster cover 37 comes into contact with the power cord 47 when the power cord 47 is crossed. Next, when the roller 44 held on the caster cover 37 comes into contact with the power supply cord 47, the roller-4 is released.
4 rotates over the power supply code 47. A caster roller 36 is provided at the rear of the power supply cord 47 so that the power supply cord 47 is immediately brought into contact with the power supply cord 47 so as to get over the power supply cord 47.

In the fourth method, an anchor-shaped plate 45 is rotatably supported in place of the roller 44 so that the front surface of this plate moves while sliding on the slope of the power supply cord 47. Then, when reaching the top, the entire caster U28 attached to the lower surface of the vacuum cleaner main body is lifted up, and gets over the power supply cord 47. At the next moment, the power supply cord 47 rolls on the opposite slope and reaches the caster roller 36. This prevents the power cord from being bitten.

Next, a method for preventing a floor from being damaged will be described. 7 and 8, reference numeral 48 denotes a front protection member formed of a material such as a brushed cloth fixed to the lower main body 21. 49
Is a protection member after being held in front of the caster unit 28.

In the second method, as shown in FIGS. 9 and 10, electrostatic flocking is applied to a part of the lower body 21 in front and rear. 50 is a front flocking part and 51 is a rear flocking part.

In the third method, a caster roller unit 28 of the lower body 21 is provided with a recess 52 in front of the caster roller unit 28.
A rear protective member 53 such as a brushed cloth is provided on the front surface of the cover 37. 54 is a front protection member. This allows
The floor protection member can be formed with a smaller area than that for fixing to the lower body 21.

[0033] Thus, when crossing a threshold, etc., the front protection is first performed by the front protection member, and the rear protection is performed by the rear protection member, so that even if the main body hits the threshold or other obstacle, the impact is suppressed. This eliminates the possibility of damaging the floor surface 46 and protects the bottom surface of the vacuum cleaner main body.

[0034]

As described above, according to the present invention, by adopting the structure of the front roller and the rear caster, the rear of the main body rotates about the center of the roller when the obstacle is passed. It will be easier. Also, by forming the distance between the flange on the lower surface of the caster cover and the floor surface smaller than the diameter of the power cord, the flange portion of the caster cover rides when the power cord is crossed, and the recoil thereof causes the main body to move. The rear of the unit turns to guide the power cord, and it is easy to discharge to the rear. It does not get caught between the caster roller and the floor and locks. As a result, it is possible to get over the cord, thereby alleviating the clogging caused by the power cord, which has often occurred during cleaning, and improving the usability of the vacuum cleaner. In addition, it is possible to reduce damage to the sill and the like that occurs when the vacuum cleaner passes over an obstacle such as a sill, and to reduce contact resistance when the vehicle moves over an obstacle, thereby further improving usability.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a side view of the vacuum cleaner showing one embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of a vacuum cleaner showing an embodiment of the present invention.

FIG. 4 is an enlarged view of a main part of a vacuum cleaner showing another embodiment of the present invention.

FIG. 5 is an enlarged view of a main part of a vacuum cleaner showing another embodiment of the present invention.

FIG. 6 is an enlarged view of a main part of a vacuum cleaner showing another embodiment of the present invention.

FIG. 7 is a side view of a vacuum cleaner showing another embodiment of the present invention.

FIG. 8 is a bottom view of a vacuum cleaner showing another embodiment of the present invention.

FIG. 9 is a side view of a vacuum cleaner showing another embodiment of the present invention.

FIG. 10 is a bottom view of a vacuum cleaner showing another embodiment of the present invention.

FIG. 11 is a side view of a vacuum cleaner showing another embodiment of the present invention.

FIG. 12 is a bottom view of a vacuum cleaner showing another embodiment of the present invention.

FIG. 13 is an overall configuration diagram of a conventional vacuum cleaner.

FIG. 14 is a side view showing a conventional vacuum cleaner.

FIG. 15 is a use state diagram of a conventional vacuum cleaner.

FIG. 16 is a use state diagram of a conventional vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Lower main body 22 Electric blower 24 Dust collection bag 25 Dust collection chamber 26 Lid 27 Roller 28 Caster U 29 Hose 30 Handle part 31 Tip pipe 32 Extension pipe 33 Floor nozzle 34 Connection pipe 35 Intake hole 36 Caster roller 37 Caster cover 38 Caster Shaft 39 Caster mounting plate 40 Screw 41 Retaining ring 42 Sliding member 43 Flange 44 Roller 45 Anchor-shaped plate 46 Floor surface 47 Power cord 48 Front protection member 49 Rear protection member 50 Front flocked member 51 Rear flocked member 52 Recess

Continuing on the front page (72) Inventor Kazuma Suo 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 56) References JP-A-61-280825 (JP, A) JP-A-63-64341 (JP, U) JP-A-38-15317 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , (DB name) A47L 5 / 00,9 / 00

Claims (7)

(57) [Claims] The method according to claim 1 an electric blower chamber arranged an electric blower to the rear to form a dust collecting chamber for the dust collecting dust in front, and the body having a forward air intake hole of the dust collecting chamber, openably caster cover with placing the lid that covers the dust collection chamber, a transport wheel which the center of gravity of the electric blower is placed before Symbol body arranged center of rotation on either side of the front, only the rear of the transport wheel in the moving casters that is composed of a caster roller over
In the vacuum cleaner body provided with U, a flange is formed below the caster roller support portion of the caster cover, and the distance between the flange and the floor is determined by the diameter of the power cord of the vacuum cleaner. Vacuum cleaner made small. 2. A key Yasuta - cover - electric vacuum cleaner according to claim 1, wherein holding the sliding member to the bottom surface of the flange. 3. A key Yasuta - cover - rotatably in the side surface of the flange b - La - journaled and b the pivotally supported position - La - the distance between the floor surface power cable - than the diameter of the de The vacuum cleaner according to claim 1 formed to be small. 4. A key Yasuta - cover - the pivoted anchor-shaped plate above the floor surface on the flange side, the power supply distance between the bottom surface and the floor surface of the anchor-shaped plate co - smaller than the diameter of the de-forming The electric vacuum cleaner according to claim 1. 5. A front of the mounting center of the moving wheels of the lower body bottom, the transport wheel and caster - mounting unit
5. The protective member according to claim 1 , wherein each of the protective members is fixed .
The vacuum cleaner according to claim 1 . 6. The vacuum cleaner according to claim 5, wherein the protective member is formed by applying electrostatic flocking to the bottom surface of the lower main body. 7. The vacuum cleaner according to claim 5, wherein a concave portion is provided in front of the moving caster U mounting portion of the lower main body, and a rear protective member is fixed to a front surface of the caster cover.