JPH0815472B2 - Vacuum cleaner suction body - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner including a rotary brush that is rotationally driven by an electric motor or an air turbine.

(Prior Art) Conventionally, as shown in FIG. 5, a bearing 5 rotatably supporting a rotary shaft body 4 at an end portion of a rotary brush 3 formed by implanting brush bristles 2 on an outer peripheral surface of a brush base 1. In the suction inlet main body of the electric vacuum cleaner in which the bearing is supported by the bearing support portion 7 of the suction inlet main body 6, the end of the brush base 1 is inclined toward the bearing 5 so that dust can be scraped out from the carpet 8 even under the bearing 5. The structure in which the brush bristles 2a are planted is adopted. But this 5th
In the suction port body of the conventional electric vacuum cleaner shown in the figure, the hair scraped from the carpet 8 by the brush bristles 2 and 2a, thread waste, and the like are entangled in the bearing 5, and the sliding between the bearing 5 and the brush base 1 There is a problem that the inside of the rotating brush 3 of the moving part is clogged and cannot be removed, which hinders the rotation of the rotating brush 3.

Therefore, in order to prevent hair, lint, and the like from getting caught in the bearing 5, the rib of the cylindrical shape is conventionally formed by projecting the outer peripheral portion of the end surface of the brush base 1 toward the bearing 5, as shown in FIG. The structure in which 9 is formed is adopted. The cylindrical rib 9 rotates the outside of the bearing support 7 protruding inward from the side wall of the suction port body 6 as the rotary brush 3 rotates, and prevents dust from entering the bearing 5. is there. However, even with this conventional structure, thread wastes and the like enter the bearing portion through the gap between the cylindrical rib 9 and the inner surface of the suction port body 6, and the bearing 5 portion, especially the sliding portion with the rotating brush 3. Where it is difficult to remove lint,
In other words, it is not possible to prevent entanglement of thread waste or the like inside the sliding portion.

Further, for example, as described in Japanese Utility Model Laid-Open No. 58-125564, a large-diameter flange portion is continuously provided on a conical inclined surface which is provided on both ends of the rotary brush and whose diameter increases toward the outside.
The rotation of the rotating brush due to the inclusion of lint in the bearing and the inclusion of lint is prevented.

However, in the one disclosed in Japanese Utility Model Laid-Open No. Sho 58-125564, since the thread debris and the like are prevented from moving outward at the flange portion, when removing these thread debris, the flange portion becomes an obstacle. There is a problem that it cannot be removed by moving it to the outside.

(Problems to be Solved by the Invention) As described above, in the suction port body of the conventional electric vacuum cleaner shown in FIG. 5, the thread waste scraped up by the brush bristles 2 and 2a is entangled with the bearing, and FIG. When the cylindrical rib 9 is formed by projecting the outer peripheral portion of the end surface of the brush base 1 toward the bearing 5 side as shown in FIG. 1, thread scraps and the like are generated from the gap between the cylindrical rib 9 and the inner surface of the suction port body 6. Cannot enter the bearing 5 part and prevent the entanglement of thread waste or the like in the bearing 5 part, especially in the sliding part with the rotating brush 3. Further, the one disclosed in Japanese Utility Model Laid-Open No. 58-125564 has a problem that the yarn waste prevented from entering the bearing portion cannot be easily removed.

The present invention solves such a problem and can reliably prevent entanglement of thread waste or the like on the bearing portion, especially on the sliding portion with the rotating brush, so that rotation of the rotating brush is not hindered and entanglement is prevented. An object of the present invention is to provide a suction port body of an electric vacuum cleaner that can easily remove lint and the like. Another object of the present invention is to provide a suction port body for an electric vacuum cleaner, which can more reliably prevent intrusion of powder of wool yarn into the sliding portion between the bearing and the rotating brush when the yarn is caught in the bearing portion. And

(Means for Solving the Problem) A suction port body of an electric vacuum cleaner according to claim 1, wherein a suction port body having a suction port, a drive source provided in the suction port body, and an outer peripheral surface of the brush base. A rotary brush provided in the suction port body facing the suction port and driven to rotate by the drive source; and both ends of the rotary brush provided in the suction port body rotatably. A bearing for supporting, and a cylindrical rib protruding outward in the axial direction is formed on an outer peripheral portion of at least one end portion in the axial direction of the rotating brush, and the bearing has a cylindrical shape coaxial with the bearing. A disk-shaped flange whose outer peripheral surface is close to the inner peripheral surface of the rib is formed, and the tip of the cylindrical rib is projected outward in the axial direction from the outer peripheral surface of the disk-shaped flange.

The suction port body of the vacuum cleaner according to claim 2 is the suction port body of the vacuum cleaner according to claim 1, wherein the bearing is movably supported by the suction port body, and a cylindrical rib of the brush base of the rotary brush is provided. Formed on the inner portion and the disk-shaped flange of the bearing are facing surfaces that are not parallel to the axial direction of the rotating brush and that face outward in the axial direction on the rib side, and an elastic member is provided between these facing surfaces. It is provided so as to be slidable on at least one of the facing surfaces.

(Operation) When the suction member of the electric vacuum cleaner according to claim 1 sucks the dust scraped out from the surface to be cleaned by the brush member of the rotating rotary brush from the suction port, especially at the end of the rotary brush, for example, Hair and lint cling to the outer peripheral surface of the cylindrical rib of the brush base rotating outside the disk-shaped flange of the bearing, but the outer peripheral surface of the bearing flange is close to the inner peripheral surface of this rib. Moreover, since the tip of the rib projects outward in the axial direction from the outer peripheral surface of the flange, intrusion of lint, etc., between the bearing and the brush base is reliably prevented, and the bearing portion, especially the rotating brush Entanglement of lint, etc. on the sliding portion is prevented, and the rotation of the rotary brush is prevented from being hindered.

The suction port body of the electric vacuum cleaner according to claim 2 is the suction port body of the electric vacuum cleaner according to claim 1, wherein when the thread waste scraped up by the brush member is entangled with the bearing, the thread waste is the bearing. The flange of the movable bearing is pressed toward the brush base by the thread waste that is entangled, and the inner part of the cylindrical rib of the brush base and the flange. Elastic members between the facing surfaces that are not parallel to the axial direction and that face outward in the axial direction on the rib side are pressed into contact with both facing surfaces, and dust such as dust of thread waste enters between the bearing and the brush base. Is more reliably prevented. In addition, when the lint is not entangled with the bearing, the elastic member is not compressed, and the abrasion resistance by the elastic member during rotation of the rotating brush hardly works, so that the rotating brush rotates smoothly.

(Example) Hereinafter, the structure of an example of the suction inlet of the vacuum cleaner of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 11 denotes a suction port main body, and the suction port main body 11 includes a lower main body case 12 having an upper surface opened and an upper main body case (not shown) having a lower surface connected to an upper side of the lower main body case 12 via a bumper 13. It consists of Then, inside the suction port main body 11, partition walls 16, 17, 18 and 19 which are integrally formed with the lower main body case 12 and the upper main body case, respectively, are used to form the rotary brush chamber 20, the switching knob chamber 21 and the communication chamber 22. The turbine chamber 23 and the turbine holding chamber 24 are partitioned from each other. That is, the rotating brush chamber 20 is formed on the front side by the front and rear partition walls 16 extending in the left-right direction, and the front and rear partition walls 16 are formed.
By the left and right partition walls 17, 18, 19 extending rearward from the rear side, the switching knob chamber 21, the communication chamber 22 and the turbine chamber 23 are arranged side by side in the rear direction.
And a turbine holding chamber 24 are formed.

A suction port 31 is formed on the bottom surface of the lower body case 12 so as to face the rotary brush chamber 20. Further, the front and rear partition walls 16 are formed with a first communication port 32 having a relatively large opening area facing the communication chamber 22, and a second communication port 33 having a relatively small opening area facing the lower portion of the turbine chamber 23. And the belt insertion opening facing the turbine holding chamber 24.
34 is formed with an opening. Further, a connection pipe insertion port 35 is formed in the rear surface of the suction port body 11 so as to face the communication chamber 22.

On the other hand, 41 is a connecting pipe, and this connecting pipe 41 is a turning pipe 42 whose rear part is formed in a substantially cylindrical shape, and is bent and fitted and connected to the rear part of the turning pipe 42 so as to be rotatable in the circumferential direction. It is composed of a cylindrical connecting pipe 43, is located at the center of the rear part of the suction port body 11, and is rotatably clamped by a lower body case 12 and an upper body case by a predetermined angle. The front portion of the rotating tube 42 is a semi-cylindrical portion 45 having a front end opening portion 44, and a supporting portion 46 is formed on the end surface of the semi-cylindrical portion 45 on the side of the switching knob chamber 21. A cylindrical support shaft portion 48, which has a shaft opening 47 inside, is formed coaxially with the support portion 46 on the opposite end surface portion. Then, the support shaft portions 46, 48 are rotatably fitted in the bearing holes 49, 50 formed in the partition walls 17, 18 on both sides of the communication chamber 22, and the semi-cylindrical portion 45 is placed in the communication chamber 22. It is supported rotatably in the front-back direction. The shaft chamber 47 allows the turbine chamber 23 and the inside of the connecting pipe 41 to communicate with each other. In addition,
The connection pipe 43 is projected rearward through the connection pipe insertion port 35.

On the other hand, 51 is a switching knob, and the switching knob 51 is supported on a pair of guide ribs 52 formed in the switching knob chamber 21 so as to be slidable left and right. A knob portion 53 is formed on the upper surface of the switching knob 51 so as to project, and the knob portion 53 protrudes upward from the upper main body case. The front of the switching knob 51 slides on the front surfaces of the front and rear partition walls 16 to make the first communication port 32.
An opening / closing plate 54 for integrally closing the opening / closing portion is formed integrally. Further, an engagement piece 55 is formed on the rear portion of the switching knob 51. On the other hand, in the switching knob chamber 21, a pair of left and right engaging recesses 56 are formed to which the engaging pieces 55 are detachably engaged and hold the switching knob 51 at a predetermined position.

Further, 61 is a rotary brush, and this rotary brush 61 has a cylindrical brush base 62 whose longitudinal direction is the left-right direction, and this brush base 62 is an elongated brush base body 63.
And a brush-shaped pulley 64 and an end brush base 65, which are coaxially fixed to both ends of the brush base body 63, respectively. A plurality of brush bristles 66 as a brush member are spirally arranged and planted on the outer peripheral surface of the brush base 62. In particular, at the end portion of the brush base 62 on the side of the brush base 65, the brush bristles 66a as a plurality of brush members that are inclined with respect to the axial direction thereof and project outward from the brush base 62 in the axial direction.
Has been planted. A rotary shaft body 67 is coaxially press-fitted and fixed to both ends of the brush base 62.
67, a bearing in which at least the outer peripheral surface on the tip side has a quadrangular prism shape
68 and 69 are rotatably fitted together. On the other hand, the lower main body case is located on the left and right end surfaces in the rotating brush chamber
The bearing support portions 70 and 71, which are ribs that open upward and are substantially U-shaped in a side view, are formed on the bearing 12. The tip ends of the bearings 68, 69 are detachably fitted to the bearing support portions 70, 71, respectively, so that the rotary brush 61 is rotatably supported in the rotary brush chamber 20 with the axial direction as the rotational axis direction. Has been done. The tips of the brush bristles 66a that obliquely project are located radially outward of the portion of the one bearing 68 that projects axially outward from the brush base 62.

Then, on the outer peripheral portion of the end surface of the brush base 62 on the side of the end brush base 65, a cylindrical rib 72 projecting axially outward from this end surface, that is, toward the tip side of the bearing 68 is coaxially and integrally formed. Has been done. Also, a concave portion is formed in the center of the end surface of the brush base 62
73 is formed, and the base end side of the bearing 68 is located in the recess 73. A washer 74 fitted to the rotary shaft body 67 is slidably sandwiched between the base end surface of the bearing 68 and the bottom surface of the recess 73. Similarly, the washer 74 is also provided on the bearing 69 on the opposite end side.

On the other hand, a disk-shaped flange 75 is integrally formed coaxially at an intermediate position on the outer peripheral surface of the bearing 68.
The outer peripheral surface of is closely opposed to the inner peripheral surface of the cylindrical rib 72 of the brush base 62. The outer peripheral portion of the flange 75 and the axial end surface of the brush base 62 that faces the outer peripheral portion are tapered so that the diameter decreases outward in the axial direction. And rib
The tip of 72 slightly projects outward in the axial direction from the outer peripheral surface of the flange 75.

Further, 81 is an air turbine as a drive source, and the turbine 81 is fixed to the left side of the rotary shaft body 82 extending in the left-right direction in FIG. A gear-shaped pulley 83 is provided at the right end of the rotary shaft body 82 in FIG. Further, a bearing 84 is rotatably fitted to the rotating shaft body 82 and is located between the turbine 81 and the pulley 83.
The bearing 84 is used to divide the partition wall 19 and the turbine holding chamber 24.
The turbine 81 is rotatably supported in the turbine chamber 23 by being fixed to the pair of left and right support walls 85 formed therein. Further, a timing belt 86 is stretched around the pulley 83 of the turbine 81 and the pulley 64 of the rotating brush 61. The timing belt 86 is inserted through the belt insertion ports 34 of the front and rear partition walls 16.

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

At the time of cleaning, the tip of a hose or extension pipe connected to a cleaner body (not shown) is detachably fitted and connected to the connection pipe 43.

Then, when cleaning a floor or a fold that does not need to rotate the rotary brush 61, as shown by the chain line in FIG. 1, slide the switching knob 51 in the direction A to open the first communication port 32. deep. In this state, when the electric blower in the cleaner body is driven, it flows in through the suction port 31 and the rotary brush chamber 20,
An air flow is generated through the first communication port 32, the communication chamber 22, the tip end opening 44 of the connecting pipe 41, the inside of the connecting pipe 41, the extension pipe and the hose to reach the cleaner body. At the same time, an airflow that flows into the connecting pipe 41 from the rotary brush chamber 20 through the second communication port 33, the turbine chamber 23, and the shaft opening 47 is generated, but the second communication port 33 is smaller than the first communication port 32. Since the air passage resistance due to the turbine 81 and the like is also large, most of the airflow flows from the first communication port 32 and flows into the connecting pipe 41 without passing through the turbine 81. On the other hand, the airflow passing through the turbine 81 does not rotate the turbine 81, and the rotating brush 61 does not rotate.

Then, the dust sucked together with the airflow is guided to and captured by the dust collection chamber of the cleaner body.

On the other hand, when cleaning a carpet or the like that requires rotating the rotary brush 61, the switching knob 51 is slid in the B direction as shown by the solid line in FIG. To block. In this state, all the airflows flow into the turbine chamber 23 from the second communication port 33,
Since the turbine 81 is sprayed, the turbine 81 rotates. Then, the rotational force of the turbine 81 is transmitted through the pulley 83, the timing belt 86 and the pulley 64 to the rotating brush 61.
Is transmitted to the rotary brush 61 to rotate. The brush bristles 66 of the rotating rotary brush 61 scrape out dust from an object to be cleaned such as a carpet, and the scraped dust is sucked in through the suction port 31. In particular, the bearing near the side surface of the suction port body 11
At a position below 68, the slanted brush bristles 66a scrape out dust. Therefore, by arranging the side surface of the suction port main body 11 having the inclined brush bristles 66a along a wall or the like, dust can be scraped out also on the wall or the like.

At that time, if dust, especially hair or lint scraped up by the slanted brush bristles 66a, is caught on the rotating brush 61 or the bearing 68 portion thereof, the brush base rotating outside the flange 75 of the bearing 68. 62 cylindrical ribs
It is wound around the outer peripheral surface of 72, the bearing support portion 70 of the suction port main body 11 and between the bearing support portion 70 and the outer surface of the flange 75 of the bearing 68. Since the outer peripheral surface of the flange 75 is close to the inner peripheral surface of the rib 72 of the brush base 62 and the tip of the rib 72 projects axially outward from the outer peripheral surface of the flange 75, the bearing 68 Intrusion of thread wastes between the brush base 62 and the brush base 62 is reliably prevented. That is, if a part of the outer peripheral surface of the flange 75 is projected outward from the rib 72, there is a possibility that thread waste or the like will be entangled between the outer peripheral surface of the flange 75 and the rib 72, but this is not present. Also, the flange of the bearing 68
75 on both sides in the diagonal direction on the axially outer side of 75
Since it is located on the radially inner side of the outer periphery of the flange 75, thread waste that is entangled in the axially outer portion is located on the radially inner side of the outer periphery of the flange 75, and the outer peripheral surface of the flange 75 and the rib 72 are Since the gap between them is narrow, dust is prevented from entering this gap.

In this way, it is possible to reliably prevent the thread 68 or the like from being entangled in the bearing 68 portion, particularly the sliding portion between the bearing 68 and the rotating brush 61,
The rotation of the rotating brush 61 is prevented from being hindered. Since the bearing support portion 70 and the bearing 68 are both fixed portions, the thread waste wound between them does not hinder the rotation of the rotary brush 61.

Further, according to the above configuration, the rib 72 and the flange 75
Since it is formed integrally with the brush base 62 and the bearing 68, and no separate member is required, the cost can be reduced.

Further, since the outer peripheral surface of the flange 75 is not in contact with the inner peripheral surface of the rib 72, and in addition, no force is applied to the rotating brush 61 to prevent the dust from being entangled in the bearing 68 portion, the rotational torque is reduced. Even if the weak turbine 81 is the drive source,
No problem.

Next, another embodiment of the present invention will be described with reference to FIG.

In the embodiment shown in FIG. 3, similarly to the first and second embodiments, the tip surface of the brush base 62 and the disk-shaped flange 75 of the bearing 68 on the brush base 62 side are provided in the cylindrical rib 72. And end faces of the contact surfaces 62a and 75a, which face each other in parallel and substantially parallel to each other in the axial direction, have an annular felt 91 as an elastic member interposed between the facing surfaces 62a and 75a. The felt 91 is slidable on at least one of the facing surfaces 62a and 75a.

Then, when the thread waste scraped up from the carpet 92 or the like is caught by the slanted brush bristles 66a between the portion of the bearing 68 axially outside of the flange 75 and the bearing support portion 70 of the suction port main body 11, The flange 75 of the movable bearing 68 is pressed toward the brush base 62 by the lint and the like. Therefore, the felt 91 between the flange 75 and the facing surfaces 75a, 62a of the brush base 62 is compressed and pressed against the facing surfaces 75a, 62a. Therefore, the intrusion of dust such as yarn waste, for example, powder of wool yarn, between the bearing 68 and the brush base 62 is more reliably prevented, which is more effective.

On the other hand, when no lint is caught in the bearing 68, no pressure is applied to the felt 91.
Receives almost no frictional resistance due to felt 91 during rotation,
It rotates smoothly.

The elastic member may be made of a material other than the felt 91.

Next, still another embodiment of the present invention will be described with reference to FIG.

In the embodiment shown in FIG. 4, the cylindrical rib 72 of the brush base 62 has a tapered shape whose diameter increases outward in the axial direction, that is, toward the tip. Note that only the inner peripheral surface of the rib 72 may be tapered instead of the entire rib 72. On the other hand, the outer peripheral surface of the flange 75 of the bearing 68, which closely faces the inner peripheral surface of the rib 72, also has a taper shape that expands radially outward. An annular felt 91 is sandwiched between the inner peripheral surface of the rib 72 and the outer peripheral surface of the flange 75, which are the facing surfaces 72a and 75b, and the felt 91 is at least one of the facing surfaces 72a and 72a. It is slidable with respect to 75b.

Since the facing surfaces 72a and 75b are inclined with respect to the axial direction, when dust is wound around the bearing 68, pressure is applied to the felt 91.

With the configuration shown in FIG. 4 as well, it is possible to obtain the same operational effect as the embodiment shown in FIG. 3 in which the felt 91 is provided. Moreover, the felt 91 is a rib on the brush base 62.
It is even more effective as it is located more outwardly between the inner portion of 72 and the flange 75.

In each of the above embodiments, the drive source of the rotary brush 61 is the air turbine 81, but the drive source may be an electric motor.

In addition, inclined bristles may be provided at both ends of the rotary brush. In that case, ribs and flanges are provided at both ends and both bearings of the rotating brush, respectively.

Furthermore, the brush bristles as the brush member of the rotating brush 61.
66, 66a may be elastic projecting pieces formed of a soft vinyl chloride resin or the like, instead of bundling filaments.

(Effect of the invention) According to the suction port body of the electric vacuum cleaner of claim 1, a cylindrical rib protruding toward the bearing is formed on the outer peripheral portion of at least one end portion in the axial direction of the rotating brush, A disk-shaped flange whose outer peripheral surface is close to the inner peripheral surface of the rib is formed, and the tip of the rib is projected outward in the axial direction more than the outer peripheral surface of this flange. Compared with the case where a cylindrical rib that covers the bearing is formed, it is possible to reliably prevent entanglement in the bearing part such as thread waste scraped out by the brush member, especially in the sliding part including the flange between the bearing and the rotating brush. Therefore, it is possible to more reliably prevent the rotation of the rotating brush from being hindered by the entanglement of thread waste or the like.

According to the suction port body of the vacuum cleaner of claim 2, in addition to the suction port body of the vacuum cleaner of claim 1, the rib is not parallel to the axial direction in the rib of the brush base and the flange of the bearing. Since the opposing surfaces facing outward in the axial direction are formed on both sides and the elastic member is provided between these opposing surfaces, when the thread waste gets caught in the portion axially outside the flange of the bearing, the elastic members face each other. By being pressed against the surface, it is possible to prevent dust and other dust from entering the space between the bearing and the brush base more reliably, and when the yarn waste is not entangled in the bearing, the elastic member Since the rotating brush is not compressed and receives almost no frictional resistance due to the elastic member during rotation, the rotating brush can be smoothly rotated.

[Brief description of drawings]

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 a part of which is cut away,
2 is a perspective view of a part of the above rotary brush, FIG. 3 is a cross-sectional view of the vicinity of a bearing showing another embodiment of the present invention, and FIG. 4 is a vicinity of a bearing showing still another embodiment of the present invention. Cross-sectional views, FIG. 5 and FIG. 6 are cross-sectional views of the vicinity of bearings showing examples of the suction inlet of the conventional electric vacuum cleaner. 11 …… Suction port body, 31 …… Suction port, 61 …… Rotating brush,
62 ... Brush base, 62a ... opposing surface, 66,66a ... brush bristles as a brush member, 68 ... bearing, 72 ... cylindrical rib, 72a ... opposing surface, 75 ... flange, 75a ... … Opposite face,
75b ... Opposing surface, 81 ... Turbine as driving source, 91 ...
... Felt as an elastic member.

Continuation of front page (56) References Open 57-169252 (JP, U) Open 57-36257 (JP, U) Open 58-125564 (JP, U)

Claims (2)

[Claims] 1. A suction port body having a suction port, a drive source provided in the suction port body, and a brush member provided on an outer peripheral surface of a brush base, the suction port body facing the suction port. A rotary brush that is rotatably driven by the drive source, and a bearing that is provided in the suction port body and rotatably supports both ends of the rotary brush, and at least one end portion in the axial direction of the rotary brush. A cylindrical rib protruding outward in the axial direction is formed on the outer peripheral portion, and a disk-shaped flange whose outer peripheral surface is close to the inner peripheral surface of the cylindrical rib is formed on the bearing coaxially with the bearing. The suction port body of the electric vacuum cleaner, wherein the tips of the cylindrical ribs are projected outward in the axial direction from the outer peripheral surface of the disk-shaped flange. 2. The bearing is movably supported by the suction port main body, and is not parallel to the axial direction of the rotary brush between the inner portion of the cylindrical rib of the brush base of the rotary brush and the disk-shaped flange of the bearing. Further, opposed surfaces facing outward in the axial direction are respectively formed on the rib side, and an elastic member is slidably provided between these opposed surfaces with respect to at least one of the opposed surfaces. The suction port body of the electric vacuum cleaner according to 1.