JP4985145B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner, and more particularly to a configuration in which casters are provided on front wheels and rear wheels as traveling means.

In the conventional canister type vacuum cleaner, when a caster is provided on the front wheel and the rear wheel as a traveling means, a means of restricting the rotation direction of the caster is devised in order to ensure the stability of the main body, No consideration is given to the caster cover and the caster roller mounting portion (see, for example, Patent Document 1).
JP 63-31629 A

  However, in the configuration in which casters are provided on the front wheels and the rear wheels as a traveling means of the conventional vacuum cleaner, as the size of the motor increases with the increase in input as in recent vacuum cleaners for overseas, When a caster is used for a rear wheel with a heavy load on the motor, there is a problem that the load bearing performance and wear resistance of each bearing must be improved by repeated rotation of the caster roller and caster cover. .

  The present invention solves the above-mentioned conventional problems, and in the case of adopting a caster as a traveling means, the load-carrying performance and wear resistance that can be secured to the front wheel caster and the rear wheel caster are secured, and the structure is inexpensive. With the goal.

In order to solve the conventional problems, an electric vacuum cleaner main body including an electric blower that generates suction air, a dust collecting unit that is disposed in front of the electric blower and collects sucked dust, and the electric It consists of a front wheel caster provided at the bottom front part of the vacuum cleaner body and a pair of rear wheel casters provided on the left and right of the bottom rear part of the vacuum cleaner body,
The front wheel caster and the rear wheel caster include a caster cover that is pivotally supported on a support shaft formed in a convex shape from a bottom surface of the main body of the electric vacuum cleaner, and a shaft support of the caster cover. The caster roller is provided at a position eccentric from the position, and the caster roller of the front wheel caster is pivotally supported on the caster cover by an integrally formed resin rotating shaft, while the caster roller of the rear wheel caster is made of metal. Support the caster cover with the rotating shaft,
A metal ring having a flange is press-fitted to the support shaft to which the rear wheel caster is attached, and the rear wheel caster is inserted into a support shaft provided with the metal ring having the flange. After that, the caster cover of the rear wheel caster is sandwiched between the metal ring having the flange and the metal washer and fastened with a screw to be rotatably supported, and the rear wheel caster cover is slidably rotated. by all sliding surface is brought into contact with the metal surface of the washer and the ring, the rear wheel caster load bearing performance characterized in that the elevated compared to the load bearing performance of the front wheel caster, the motor than or code winder relatively load load is small front wheel caster to the wheel caster load carrying capacity after large applied load supporting the placed posterior etc. It is to increase, it is possible to ensure the strength required for the rear wheel caster with a simple structure, and can be constructed at low cost as a whole optimizing the strength for each load. In addition, the horizontal rotation of the rear wheel becomes lighter and handling can be facilitated.

  The electric vacuum cleaner of the present invention can be realized at low cost while ensuring reliability when a caster is employed as the traveling means.

According to a first aspect of the present invention, there is provided an electric vacuum cleaner main body including an electric blower that generates suction air, a dust collecting unit that is disposed in front of the electric blower and collects sucked dust, and the electric vacuum cleaner main body. A front wheel caster provided in the front part of the bottom surface and provided on the left and right sides of the rear part of the bottom surface of the main body of the vacuum cleaner.
With a pair of rear wheel casters,
The front wheel caster and the rear wheel caster include a caster cover that is pivotally supported on a support shaft formed in a convex shape from a bottom surface of the main body of the electric vacuum cleaner, and a shaft support of the caster cover. The caster roller is provided at a position eccentric from the position, and the caster roller of the front wheel caster is pivotally supported on the caster cover by an integrally formed resin rotating shaft, while the caster roller of the rear wheel caster is made of metal. Support the caster cover with the rotating shaft,
A metal ring having a flange is press-fitted to the support shaft to which the rear wheel caster is attached, and the rear wheel caster is inserted into a support shaft provided with the metal ring having the flange. After that, the caster cover of the rear wheel caster is sandwiched between the metal ring having the flange and the metal washer and fastened with a screw to be rotatably supported, and the rear wheel caster cover is slidably rotated. by all sliding surface is brought into contact with the metal surface of the washer and the ring, the rear wheel caster load bearing performance characterized in that the elevated compared to the load bearing performance of the front wheel caster, the motor The load-bearing performance of the rear wheel caster with a large load load that supports the rear part where the cord take-up device, etc. is placed is better than the front wheel caster with a relatively small load load. It is to increase, it is possible to ensure the strength required for the rear wheel caster with a simple structure, and can be constructed at low cost as a whole optimizing the strength for each load. In addition, the horizontal rotation of the rear wheel becomes lighter and handling can be facilitated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a bottom view of a vacuum cleaner main body according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is an enlarged view of a part in FIG. 5 is a top view of the vacuum cleaner main body of the vacuum cleaner, FIG. 5 is a state of the floor nozzle locking state of the vacuum cleaner, FIG. 6 is a sectional view taken on line BB of FIG. 5, and FIG. It is an inclination state figure of the vacuum cleaner main body at the time of button operation.

  In FIG. 1 to FIG. 3, reference numeral 1 denotes a main body of a vacuum cleaner, which includes a motor 2 and a cord winding device 27 in the front, and includes a dust collector 25 that collects sucked dust in the front. Yes. The extension pipe 4 and the floor nozzle 5 are connected to the hose connection part 3 communicating with the dust collector 25 via a hose (not shown).

  A front wheel caster 7 is attached to the bottom surface 6 of the main body as a traveling means, and a rear wheel caster 8 is attached to the left and right of the rear. Here, the front wheel caster 7 is composed of a caster roller 9 integrally formed with a resin rotating shaft and a caster cover 10 that rotatably supports the caster roller 9, and the front wheel caster 7 protrudes from the bottom surface 6 of the main body and comes off. A fitting shaft is rotatably supported on a support shaft 12 having a pawl portion 11 for stopping. The rear wheel caster 8 includes a metal rotating shaft 14, a caster roller 15, and a caster cover 16, and the caster roller 15 is rotatably supported on the caster cover 16 via the rotating shaft 14, and has a flange 17. The metal ring 18 is inserted into a support shaft 19 protruding from the press-fitted main body bottom surface 6, and then fastened with a screw 21 through a metal washer 20 to be rotatably supported. Yes.

  Further, as shown in FIGS. 4 to 7, the upper surface of the main body has push buttons 22a (storage buttons) and 22b (power buttons) on the left and right, and the main body bottom surface 6 protrudes from the main body bottom surface 6 to the left and right. The fall prevention convex part (protrusion part) 23 and the floor nozzle locking part 24 are provided, and the fall prevention convex part 23 forms a part of the floor nozzle locking part 24. The overturn prevention convex portion 23 is arranged in front of the center of the front wheel caster 7 and the rear wheel caster 8.

  The operation and action of the vacuum cleaner having the above-described configuration are as follows.

  At the time of cleaning, a power cord (not shown) is pulled out from the cord winder 27 and connected to an outlet, and then the motor 2 is operated by pressing the power button 22b on the upper surface of the main body, which becomes an ON / OFF switch. The dust sucked from the air reaches the dust collecting device 25 through the extension pipe 4 and the hose by the suction force generated from the motor 2. Further, when cleaning each part of the room, the front wheel caster 7 and the rear wheel caster 8 on the bottom surface 6 of the main body can freely rotate so that the vacuum cleaner main body 1 can be moved in all directions.

  On the other hand, when the power cord is removed, after the power cord is disconnected from the outlet, the power cord is retracted by pressing the storage button 22a on the top surface of the main body to store the power cord in the vacuum cleaner main body 1, and then the floor nozzle on the bottom surface 6 of the main body. The floor nozzle 5 is engaged with the stopper 24 and stored.

  As described above, according to the present embodiment, even when the rear wheel caster 8 rotates in all directions while supporting the load of the vacuum cleaner body 1 when the vacuum cleaner body 1 moves, the caster roller 15 and the caster cover Since the frictional resistance is reduced by the metal rotating shaft 14, the ring 18 and the washer 20 on the sixteen shaft support portions, particularly in the rear wheel caster 8 which receives the load load of the motor 2, the wear of the shaft support portion is reduced. It becomes possible to maintain the running performance of the main body even after many years of use.

  Further, by providing the ring 18 and the washer 20 with small friction, the rotation of the caster cover 16 becomes smooth, and the follow-up performance when the vacuum cleaner body 1 is moved can be improved.

  Furthermore, in the vacuum cleaner main body 1 adopting a three-wheel caster that is inherently low in stability of the main body, even if the operation part is provided on the left and right of the upper part of the main body, the stability can be maintained by providing the fall prevention convex part 23. . That is, it is possible to prevent the main body from falling even when the operation of the power button 22b at the start / stop of cleaning or the operation of the storage button 22a at the time of storing the cord is operated with a foot instead of a hand. The main body stability can be improved.

  Furthermore, it is possible to reduce wasteful unevenness of the bottom surface 6 of the main body by using the overturn prevention convex portion 23 as an integral structure while using the locking portion 24 of the extension tube 4 for backlash and a guide portion at the time of insertion. When the main body is running, contact with a stepped portion on the floor surface or a carpet with long bristle feet is reduced, enabling smooth movement by reducing frictional resistance when the main body is running, thereby improving running stability.

  As described above, the vacuum cleaner according to the present invention can improve the wear resistance of the rear wheels at low cost, particularly when the casters are used as the front wheels and the rear wheels as the travel means. It can be applied to a structure having casters.

The bottom view of the electric vacuum cleaner in embodiment of this invention AA sectional view of FIG. Part a enlarged view of FIG. Top view of the main body of the vacuum cleaner Locking state diagram of floor nozzle of the vacuum cleaner BB sectional view of FIG. Inclined state diagram of the vacuum cleaner body when operating the push button of the vacuum cleaner

1 Electric vacuum cleaner body 2 Motor (electric blower)
7 Front Wheel Caster 8 Rear Wheel Caster 14 Rotating Shaft 15 Caster Roller 16 Caster Cover 18 Ring 20 Washer 21 Screw 25 Dust Collector

Claims (1)

An electric vacuum cleaner main body including an electric blower that generates suction air, a dust collecting unit that is disposed in front of the electric blower and collects sucked dust, and provided at a front portion of the bottom surface of the electric vacuum cleaner main body. A front wheel caster and a pair of rear wheel casters provided on the left and right of the bottom rear portion of the vacuum cleaner body,
The front wheel caster and the rear wheel caster include a caster cover that is pivotally supported on a support shaft formed in a convex shape from a bottom surface of the main body of the electric vacuum cleaner, and a shaft support of the caster cover. The caster roller is provided at a position eccentric from the position, and the caster roller of the front wheel caster is pivotally supported on the caster cover by an integrally formed resin rotating shaft, while the caster roller of the rear wheel caster is made of metal. Support the caster cover with the rotating shaft,
A metal ring having a flange is press-fitted to the support shaft to which the rear wheel caster is attached, and the rear wheel caster is inserted into a support shaft provided with the metal ring having the flange. After that, the caster cover of the rear wheel caster is sandwiched between the metal ring having the flange and the metal washer and fastened with a screw to be rotatably supported, and the rear wheel caster cover is slidably rotated. by all sliding surface is brought into contact with the metal surface of the washer and the ring, to that electrical cleaning, characterized in that the rear wheel caster load bearing performance increased compared with the load bearing performance of the front wheel caster Machine.

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