JPS59232529A - Floor nozzle of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floor nozzle for a vacuum cleaner with a rotating brush.

Conventional structure and its problems Conventionally, in this type of floor nozzle, the rotating brush was simply a rotor with bristles planted on the outer circumferential surface of the rotor, and the outermost diameter was quite large. It became. For this reason, the height of the floor nozzle inevitably becomes large, which becomes an obstacle when cleaning underneath furniture, etc. In order to solve this problem, it was considered to shorten the length of the brush bristles, but in this case, the elasticity of the bristles would reduce the effect of brushing up the carpet surface (brushing effect), reducing the cleaning ability. .

It was also considered to shorten the brush bristles and make the rotor thinner, but this was impractical because fibrous dust such as hair and threads would easily get wrapped around the rotor.

Fig. 1 shows a system devised to overcome these conventional drawbacks, in which grooves 2 are formed in the longitudinal direction of the rotor 1, and brush bristles 3 are planted in the bottom of the grooves 2. The rotating brush 4 has a diameter of the rotor 1 that maintains the length of the bristles 3 that is sufficient to achieve a brushing effect, and that prevents fibrous dust such as hair and threads from getting entangled, that is, the diameter of the rotor 1 is equal to or greater than that of the conventional one. By ensuring the diameter, the diameter of the rotating brush 4 is made smaller by the length of the brush bristles 3 facing into the groove 2.

However, this rotary brush 4 also had a problem in that dust adhered to the inside of the groove 2 during use of the floor nozzle. That is, in this type of floor nozzle, when the surface to be cleaned is a carpet or similar, the rotating brush 4
When cleaning tatami mats and floors, the rotating brush stops rotating and uses only suction to clean the tatami mats and floors. Some of the dust enters the deep part of the concave groove 2 of the rotating plastic member 4 and adheres to it, and when cleaning the carpet, the rotating brush 4
Even if you rotate it, it will remain stuck despite the centrifugal force during rotation. The amount of adhesion will eventually reach equilibrium and will no longer increase, but the weight balance of the rotating brush 4 will be disrupted.
The force generated by the unbalanced amount acts on the bearing that rotatably holds the rotating brush 4, shortening the life of the bearing.
Alternatively, the vibration caused by the unbalanced amount is transmitted to the hand holding the hose/extension pipe connected to the floor nozzle, resulting in a disadvantage that the feeling of use is poor.

OBJECTS OF THE INVENTION The present invention aims to reduce the size of the rotating brush and, by extension, the entire floor nozzle, while eliminating such conventional drawbacks, and further improves operability.

Structure of the Invention The present invention constitutes a rotating brush by a rotor having a depression-like flat part that is symmetrical with respect to the center of rotation and is formed substantially parallel to the rotation center, and brush bristles planted in the flat part. This eliminates the adhesion of dust to the rotating brush and also reduces its diameter.

DESCRIPTION OF THE EMBODIMENTS The embodiments will be described below with reference to the accompanying drawings. In FIGS. 2 to 6, the floor nozzle 11 is constructed as follows. In other words, 12 is the upper floor nozzle, and 13 is the lower floor nozzle. , are coupled via a bumper 14 that prevents damage to furniture or the like when they come into contact. Inside the front side, there is a suction chamber 1θ with the lower open part as the suction port 15, and inside the rear side there is a turbine chamber 1θ.
7 are formed respectively. Turbine chamber 17 is partition wall 1
8 and a suction chamber 16, and the rear portion having an opening 19 is formed in the shape of a circular arc.

2o is a rotating brush installed in the suction chamber 16 parallel to the suction port 15, and bearings 21 are installed on both side walls of the suction chamber 16.
It is held rotatably.

22 is a fixed brush installed parallel to the suction port 15 behind the suction port 16; There are two front wheels and two rear wheels.

Reference numeral 25 denotes a substantially cylindrical suction joint that is vertically and vertically attached to the rear inner surface of the turbine chamber 17, and a connection port 26 projects rearward from a portion of its peripheral wall in a cylindrical shape.

A floor nozzle pipe 28 is rotatably attached to the connection port 26 via a ring 27, and is connected to the suction side of the vacuum cleaner via a hose and an extension pipe.

Reference numeral 29 denotes a turbine which is disposed in the turbine chamber 17 and whose outer periphery is partially surrounded by a suction joint 25, and a shaft body 30 that penetrates the rotating shaft on one side of the suction joint 25 and protrudes outside the turbine chamber 17 is integrated. It is set in.

31 (d) A power transmission belt that transmits the rotation of the turbine 24 rotated by the wind flow to the rotating brush 2o via the pulley 32.

Further, the turbine 29 is arranged to be biased towards the side of the turbine chamber 17 where the belt 31 is arranged. 33°34 is the partition wall 18
One vent 33 faces the lower half of the turbine 29, the other vent 34il-t,
The connection port 2 of the suction joint 25 directly, not facing the turbine.
It is facing 6.

35 is a switching lever, and a shielding plate 36 protrudes from a part of the switching lever.
is formed with an opening 3 which communicates alternatively with either one of the vent holes 33, 34 described above. 38 is a switching knob formed integrally with the switching lever 36;
It protrudes to the outside from an opening 39 provided in 2, and serves as an operating part of the switching lever 35.

Further, the rotation range of the suction joint 25 in the vertical direction with respect to the upper floor nozzle 12 is determined by the stopper 40.4 formed by each
1. Now, the rotating brush 20 has a hollow plane part 43 which is formed approximately parallel to the cylinder shown in FIG. Regarding the part, a rotor 44 formed in a cylindrical shape and having a substantially inverted Z-shaped cross section is implanted in the flat part 43 in the direction of the rotation center axis, and its tip protrudes from the outermost circumferential surface of the rotor 44. The brush bristles 45 are made up of brush bristles 45. The rotating brush 2o is held by the bearing 21 and the lower floor nozzle 13 so that the tips of the brush bristles 45 protrude from the suction port 15, as shown in FIG. Further, the direction of rotation is counterclockwise, and the end portion 46 of the flat portion 43 is set to be behind the bristles 45 with respect to the direction of rotation.

Further, the flat portion 43 of the rotor 4A is twisted approximately 180 degrees from one end of the rotor 44 to the other end.

In the above configuration, now slide the switching lever 35 to the right in FIG.
3, the suction air that flows from the suction port 16 to the suction chamber 16 to the vent 33 collides with the turbine 29, and then flows from the connection port 26 of the suction joint 26 to the floor nozzle pipe 28 to the extension pipe hose. This ranges from vacuum cleaners. Therefore, the turbine 29 rotates and its rotational force is transmitted to the rotating brush 2o after deceleration.

When the opening 3 of the shielding plate 36 is communicated with the other vent 34 via the switched switching lever 35, the suction air is transferred to the turbine 2.
9 flows through the turbine chamber 17 and reaches the suction joint 25, so the turbine 29 and the rotating brush 20id do not rotate.

In addition, since the floor nozzle 11 can be raised or lowered with respect to the suction joint 25 during cleaning work, the suction port 15 of the floor nozzle 11 faces the surface to be cleaned, regardless of the worker's posture.
It can perform reliable dust collection.

Further, as described above, the rotating brush 20 is formed in a cross section with a substantially inverted diagonal shape, and has a rotor 44 twisted approximately 180 degrees from one end to the other end, and a flat portion 43 of the rotor 44 facing each other. It is made up of brush bristles 45 that are planted in a manner similar to that shown in FIG.

Therefore, as shown in FIG. 4, the outer diameter of the rotating brush 20 can be reduced by the difference between the distance from the central axis of the rotor 44 to the outermost peripheral neck and the distance to the flat part 43. That is, in order to obtain a sufficient brushing effect, the protruding length of the brush bristles 45 from the implanted portion in the outer circumferential direction must be a certain value or more, but according to this embodiment, the protruding length of the bristles 46 is is the same as the conventional one, but since the implanted part is closer to the rotating shaft side by the amount L mentioned above, the outermost diameter of the brush bristles 45 is 2L smaller than the conventional one, and therefore the outer diameter of the rotating brush 2o is smaller than the conventional one. It can be made smaller by 2L.

Because the brush bristles 45 are planted in the flat part 43, it is difficult for sentinous dust to adhere to them compared to conventional grooves, which reduces the lifespan of the bearing and makes operation easier. The occurrence of time oscillations also does not occur.

Furthermore, since the end portion 46 of the flat portion 43 is located at the rear of the brush bristles 45 in the rotating direction, when the rotating brush 45 is in contact with the carpet as shown in FIG.
There is enough space for the brush bristles 46 to fall backward in the direction of rotation, so that the brush bristles 46 can be tilted without resistance. Therefore, the resistance generated when the rotating brush 20 rotates can be reduced, and the dust scraping performance of the rotating brush 20 will not be deteriorated. The rotary brush can be made smaller and the floor nozzle can be made more compact by installing it in the flat part formed in the shape of a depression.It also prevents dust from adhering to the rotary brush, and furthermore, the brush bristles can be reduced in size. By eliminating rearward tilting resistance in the direction of rotation and ensuring smooth rotation, the operability and suction performance of the floor nozzle can be improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional rotating brush, Fig. 2 is a top view of the floor nozzle according to an embodiment of the present invention with a part of the upper nozzle removed, Fig. 3 is a sectional view of the same, and Fig. 4 5 is a sectional view of the rotating brush, and FIG. 5 is a diagram showing the operating state of the rotating brush when it is rotating. 20... Rotating brush, 43... Core surface portion, 4
4...Rotor, 45...Brush bristles.

Claims (1)

[Claims] A floor for a vacuum cleaner having a built-in rotating brush comprising a rotor having a depression-shaped flat part that is symmetrical with respect to a rotation center and approximately parallel to the rotation center, and brush bristles implanted in the flat part. nozzle.