JPH088901B2 - Vacuum cleaner suction body - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a suction port body of a vacuum cleaner having a turbine that drives a rotating brush by a suction airflow of the vacuum cleaner.

(Prior Art) Japanese Patent Publication No. 46-23195 discloses a conventional suction port body that reduces noise generated when a suction airflow hits a blade of a turbine. In the turbine 1 of the suction port body, a turbine (A) 2 and a turbine (B) 3, which are symmetrically divided and formed, are joined and attached to a shaft 4. And the blade 5 of this turbine (A) 2
The blades 5 of the turbine (A) 2 and the blades 6 of the turbine (B) 3 are alternately staggered so as to be positioned substantially in the middle of the blades 6, 6 of the other turbine (B) 3.

(Problems to be Solved by the Invention) In the suction port body having the above-described structure, the turbine cannot be integrally molded due to its structure, so that the turbine (A) and the turbine (B) are separately molded and combined together. It was attached to the shaft. In such a structure, a gap is inevitably formed in the mating portion, and dust such as hair, hair, and lint that has been sucked in along with the suction airflow enters the gap and becomes caught. Then, the dust that is found from these is added to the turbine as an extra load, which lowers the rotational speed of the turbine, and there is a problem that the scraping effect, which is the function of the rotary brush, cannot be sufficiently obtained.

The present invention solves the above problems and prevents dust of hairs, lint, and the like from being caught in the turbine while suppressing the noise of the turbine, and obtains a suction port body of an electric vacuum cleaner that does not impair the function of the rotating brush. That is the purpose.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a turbine for driving a rotary brush, a rotary shaft, and a pair of blades each having a large number of blades provided in parallel with the rotary shaft direction. Body, and the blade of one wing body is projected between the blades of the other wing body to form a blade overlap portion where a part of these blades in the direction of the rotation axis overlap, and the blade overlap portion is communicated with each other. It is located opposite the hole.

(Operation) The suction airflow is blown to the blade of the turbine through the communication hole from the suction port. Since the blades of the turbine are arranged to be staggered alternately with the adjacent blades, the suction airflow rotates the rotating brush while rotating the turbine while traversing the blades one by one. At this time, because the turbine has a blade overlapped portion where the blades overlap each other, dust such as hair and lint contained in the suction airflow is sucked into the cleaner body without entering from the outer peripheral side of the turbine to the inside. Get caught

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 11 is composed of a lower case 13 and an upper case (not shown) in which the suction port main body forms the suction port 12, and a connecting pipe 14 is provided. In the main body 11 , a rotating brush chamber 16 in which a rotating brush 15 rotatably supported facing the suction port 12 is housed, and a turbine 17 in which a turbine 17 for rotating the rotating brush 15 is housed Chamber 18
Are formed. The connecting pipe 14 is vertically supported by a support shaft portion 19 so as to be lifted up and down, communicates with the turbine chamber 18, and the connecting pipe 14 is provided with a rotatable rotating pipe 20.
The turbine 17 has a rotating shaft 22 having a gear pulley 21.
The rotary shaft 22 is supported by the bearing portion 23. On the other hand, the rotary brush 15 includes a brush base 24, end brush bases 25 provided at both ends of the brush base 24, bearings 26 provided at the end brush bases 25, brush bristles 27 provided at the outer periphery of the brush base 24, end brush bases. The brush bristles 27 are provided on 25 and are inclined outward so as to cover the bearing 26.

An engaging portion 28 is formed on the brush base 24.
A belt 29 is stretched around 28 and the gear pulley 21, and the rotation of the turbine is transmitted to the rotating brush 15 .
A bearing support portion 30 that supports the bearing 26 of the rotating brush 15 is integrally provided in the lower case 13 inside the rotating brush chamber 16. Reference numeral 31 is a communication hole provided in a partition wall 32 that partitions the rotating brush chamber 16 and the turbine chamber 18 from each other.
18 are communicated with each other, and the turbine 17 is rotated by the suction airflow flowing from the communication hole 31 into the turbine chamber 18. This turbine 17 has a large number of blades 33
A pair of wings 34 (A), 34 (B) having (A), 33 (B)
The wing body 34 (A) is provided with a large number of horizontally elongated blades 33 (A) that are provided on the outer periphery of the cylindrical portion 35 (A) in parallel with the axial direction of the rotary shaft 22 and project in the radial direction. This blade 33
(A) The length in the longitudinal direction is longer than that of the cylindrical portion 35 (A). That is, the blade 33 (A) is the end plate 36 (A)
It projects from the cylindrical portion 35 (A) on the opposite side of the. The wing body 34 (B) has the same configuration as the wing body 34 (A). To install the wing body 34 (A) and the wing body 34 (B), each blade 33 (A) is positioned between the adjacent blades 32 (B) of the wing body 34 (B), and the cylindrical portion 35 (A ), 35 (B) are positioned by the unevenness formed respectively, and the rotary shaft 22
And press-fit the push nut 37 to fix it. In such a turbine 17, as shown in FIG. 3, all the blades have an overlapping portion having a length a, the center point thereof is located on the center line of the width b of the communication hole 31, and a <b Is set to. Reference numeral 38 denotes an inflow hole that directly connects the rotary brush chamber 16 and the connection pipe 14, and has an opening area larger than that of the communication hole 31. 39 is a switching knob, and a knob portion 40 is formed on the upper portion so as to project, and the knob portion 40 is projected upward from the upper case. Further, a slidable opening / closing plate 41 for opening / closing the inflow hole 38 is integrally formed at the front part of the switching knob 39. Further, an engaging piece is provided on the rear part of the switching knob 39.
42 is formed, and an engaging recess 43 is provided with which the engaging piece 42 is engageably and disengageably engaged. Reference numeral 44 denotes rollers, which are provided in a pair of front and rear on the left and right outer surfaces of the lower case 13.

The operation of the suction inlet of the electric vacuum cleaner having the above structure will be described. At the time of cleaning, the hose connected to the cleaner body or the tip of the extension pipe is connected to the connection pipe 20.
When the floor, foldable, etc. rotating brush 15 is not rotated, the switching knob 39 is held by holding the knob 40, and the inflow hole 38 is opened as shown by the solid line in FIG. Then, the suction airflow sucked from the suction port 12 becomes
And the communication hole 31 flows from the communication hole 31 to the cleaner body via the connection pipe 14, but the communication hole 31 has a smaller opening area than the inflow hole 38 and has a large air passage resistance, so most of it flows into the inflow hole 38 and the turbine 17 rotates. do not do. On the other hand, when cleaning a carpet, etc., hold the knob 40 and move the switching knob 39 to the right in the figure,
The opening / closing plate 41 closes the inflow hole 38. Then, the suction airflow flows into only the communication hole 31 to rotate the turbine 17, and this rotation is transmitted to the rotating brush 15 via the pulley 21 and the belt 29, and the rotating brush 15 rotates. Then, the brush bristles 27 scrape dust from the carpet or the like for cleaning. At this time, since the brush bristles 27 inclined outward so as to cover the bearing 26 provided on the end brush base 25 are rotated, dust can be scraped out even at a wall or the like. The opening / closing plate 41 may be provided with the communication hole 31, and the opening / closing plate 41 may be a partition wall that partitions the rotating brush chamber 16 and the turbine chamber 18. When there is a gap between the turbine (A) and the turbine (B) as in the conventional case, hair, lint, etc. contained in the suction airflow are very easily entangled in this portion from the outer peripheral side of the turbine 17, which causes However, the rotation load of the turbine 17 is increased and the rotation speed is reduced, and the function as the rotating brush is reduced. However, according to the present embodiment, the blades 33 (A) and 33 (B) are superposed. Therefore, hair, lint, etc., will not pass from the outer peripheral side of the turbine 17 to the cylindrical portion 35.
(A), 35 (B) is not absorbed and is sucked into the cleaner body. Therefore, a sufficient function as a rotating brush can be obtained. Moreover, in the case where the conventional blades are staggered alternately, the suction airflow hitting the blades easily escapes,
Although there is also a problem that the rotational torque of the turbine is reduced, according to the present embodiment, since the overlapping portion is opposed to the communication hole, the number of blades hit by the suction air flow during one rotation of the turbine is substantially reduced. It is possible to reduce the decrease of the rotation torque. Further, according to this embodiment, the wing body 34 (A)
Since the blade bodies 34 (B) have the same size and the overlapping portions of the blades are formed to have a constant size, the weight is well balanced, and the turbine 17 is well-balanced and efficient. The present invention is not limited to the above-mentioned embodiment, for example, as shown in FIG. 4, not all blades 33 have a superposed portion, but similar effects can be obtained if several blades have a superposed portion. I will get it.

〔The invention's effect〕

As described above, according to the present invention, it is possible to prevent dust, such as hair and lint, from being caught from the outer peripheral side of the turbine to the turbine, so that an extra load is not applied to the rotation of the turbine. Therefore, the effect of scraping the dust of the rotary brush does not decrease, and the rotary brush can have a sufficient function. Further, since the overlapping portion is opposed to the communication hole, it is possible to substantially increase the number of blades hit by the suction airflow during one rotation of the turbine and reduce the decrease in the rotation torque.

[Brief description of drawings]

1 to 4 are views showing the present invention, and FIG. 1 is a plan view showing an embodiment of a suction port body of an electric vacuum cleaner of the present invention, excluding an upper main body case and partly cut away. FIG. 2 is a perspective view of the same turbine as above, FIG. 3 is a plan view of a main portion of the same as above, and FIG. 4 is a plan view of a turbine of an electric vacuum cleaner showing another embodiment. FIG. 5 is a plan view of a turbine showing a conventional example. 11 …… Suction port body, 12 …… Suction port 15 …… Rotary brush, 16 …… Rotary brush chamber 17 …… Turbine, 18 …… Turbine chamber 22 …… Rotary shaft, 31 …… Communication hole 32 …… Partition wall , 33 …… Blade 34 (A), 34 (B) …… Wing body

Claims (1)

[Claims] 1. A rotary brush chamber for accommodating a rotary brush rotatably supported facing the suction port in a main body having a suction port formed on a bottom surface, and a rotary brush rotated by a suction airflow to rotate the rotary brush. A turbine room that houses the turbine,
A suction port body of an electric vacuum cleaner comprising: a rotary brush chamber and a communication hole that communicates with the turbine chamber, wherein the turbine has a rotary shaft and a pair of blades provided in parallel with the rotary shaft direction. Wings of the
The blade of one wing body is projected between the blades of the other wing body to form a blade overlap portion where a part of the blades in the rotation axis direction overlap each other, and the blade overlap portion is A suction port body for an electric vacuum cleaner, characterized by being positioned opposite to the communication hole.