JPS644773B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vacuum cleaner suction port body equipped with a rotating brush that scrapes dust from a surface to be cleaned. This invention relates to the structure of a rotationally driven turbine.

[Conventional technology]

In the suction port body of this type of vacuum cleaner, the seventh
As shown in the figure, a rotary brush 2 is rotatably provided facing a suction port (not shown) formed on the front side of the lower surface of the suction port main body 1, and a rotary brush 2 is rotatably provided between the suction port and the main body 1.
A turbine chamber 4 is defined in the main body 1 and communicates with a connecting pipe 3 provided vertically movably on the rear side, and a turbine 5 is rotatably provided in the turbine chamber 4. The turbine 5 is rotated by the suction airflow flowing in through the communication port 4a formed on the front surface of the turbine chamber 4, and the rotation of the turbine 5 rotationally drives the rotary brush 2. A structure is known in which dust is scraped out from the surface to be cleaned by the rotation of No. 2, and this dust is sucked in through the suction port. In the example shown in FIG. 7, the suction port body 1 is composed of a lower case 6 and an upper case 7, and the brush cleaning opening formed in the upper case 7 is
It is designed to be opened and closed using a lid body 8. In addition, a pulley 9 provided at one end of the shaft of the turbine 5
and a pulley 10 provided at one end of the rotating brush 2.
A belt 11 is wound around the rotary brush 2 so that the rotation of the turbine 5 is transmitted to the rotating brush 2.

Further, the turbine 5 has a structure including a pair of disc-shaped end walls 12, 12, and a plurality of blades 13 located between these end walls 12, 12 and provided radially on the side to receive wind. ing. Conventionally, these blades 13 are provided parallel to the axial direction of the rotation axis a of the turbine 5, and the communication port 4a is located approximately at the center of the blade 13 in the axial direction of the rotation axis a of the turbine 5. It was located opposite the department.

[Problem that the invention seeks to solve]

In the structure of the conventional turbine 5 described above, the communication port 4a
Since the suction air flowing into the turbine chamber 4 hits the blades 13 of the turbine 5 all at once, there is a problem in that the noise generated at this time, especially the harsh high-frequency sound, becomes louder.

Therefore, in order to reduce the noise associated with the rotation of the turbine, the turbine is divided symmetrically into a right turbine and a left turbine. A structure in which they are joined in a shifted position in the middle is known (Japanese Patent Publication No. 23195/1983).

By adopting such a structure, the area of the blade that is hit by the suction airflow at one time can be halved, so that noise can be reduced to some extent.

However, in this structure, since one blade is shifted so as to be located between the other adjacent blades, a gap is created between the left and right blades. As a result, the suction airflow leaks through this gap, making it impossible to efficiently rotate the turbine with the suction airflow, reducing the rotational force of the turbine, which in turn reduces the rotational force of the rotating brush, resulting in low cleaning efficiency. A problem arose.

An object of the present invention is to provide a vacuum cleaner that can reduce noise generated when a turbine rotates, particularly harsh high-frequency sounds, and that does not reduce the rotational force of the turbine and therefore does not reduce cleaning efficiency. The purpose is to obtain a suction port body.

[Means for solving problems]

The suction port body of the vacuum cleaner of the present invention has a suction port opened on the outside surface and a turbine chamber having a communication port communicating with the suction port formed therein. The turbine includes a rotary brush rotatably provided facing the mouth, and a turbine rotatably provided in the turbine chamber and rotated by the suction airflow from the communication port and rotationally driving the rotary brush. The blade receiving the intake airflow is spirally inclined with respect to the axial direction of the rotating shaft of the turbine, and the communication port is located opposite to the upstream side of the slope of the blade. .

[Effect]

In the suction port body of the vacuum cleaner of the present invention, the suction airflow that flows in from the suction port of the suction port body through the communication port hits the blades of the turbine and rotates the turbine, and the rotation of the turbine rotates the turbine. A rotary brush that is driven to rotate scrapes dust from the surface to be cleaned and suctions the dust from the suction port, and the blades are tilted with respect to the axial direction of the rotation shaft of the turbine to prevent the rotation of the turbine. Sometimes, the timing of the impact of the suction airflow on each location of the blade is staggered to reduce the noise, especially high-frequency sound, generated when the suction airflow hits the blade.
Furthermore, by arranging the communication port to face the upstream side of the slope of the blade, the suction airflow passes through the entire blade from the upstream side to the downstream side, thereby improving the rotational force of the turbine.

〔Example〕

The structure of an embodiment of the suction port body of a vacuum cleaner according to the present invention will be described with reference to FIGS. 1 to 4. FIG.

Reference numeral 21 denotes a suction port body, which includes a box-shaped lower case 22 with an open top, and an upper case 23 attached to the lower case 22 so as to cover the top opening.
and a lid 24 that opens and closes a rotating brush cleaning opening formed on the front side of the upper case 23.

The upper case 23 is attached to the lower case 22 via a bumper 25 with screws (not shown). The lid body 24 also has engaging protrusions 27 and 28 formed on both sides thereof, an engaging hole 29 formed on one side of the upper case 23, and an opening/closing knob slidably provided on the other side. By engaging with the bodies 30, they are detachably attached to the upper case 23.

The inside of the suction port main body 21 is provided with a rotating brush chamber 3 on the front side by a partition wall 31 extending in the longitudinal direction.
2 is partitioned, and on the rear side of the partition wall 31 is a pair of partition walls 33 and 34 extending in the transverse direction.
It is divided into a turbine chamber 35 in the center, a turbine holding chamber 36 on one side, and a switching knob chamber 37 on the other side. is the partition wall 38
The belt chamber 39 is partitioned by.

A suction port (not shown) is opened in the lower surface of the brush chamber 32. Further, the turbine chamber 35 communicates with the brush chamber 32 through an opening 41 formed on its front surface, and a notch 42 is opened at its rear surface.

Reference numeral 43 denotes a connecting pipe rotatably provided on the rear side of the suction port main body 21, which is composed of a pipe main body 44 and a rotating pipe 45 rotatably provided on the rear side of the pipe main body 44. ing. The front side of the pipe body 44 is formed into a semi-cylindrical part 47 having an opening 46 on the front surface, and the connecting pipe 43 has a shaft part 48 formed on both sides of this semi-cylindrical part 47 in the turbine chamber. 35
It is attached to the rear side of the suction port main body 21 so as to be vertically movable by being rotatably supported by partition walls 33 and 34 on both sides of the suction port body 21 . Note that the rotation tube 45 is deviated toward the partition wall 34 with respect to the semi-cylindrical portion 47.

Reference numeral 49 denotes a rotary brush that is rotatably provided in the rotary brush chamber 32, and has brush bristles 50 spirally planted on its peripheral surface. Bearings 51 are rotatably fitted into shafts (not shown) protruding from both end surfaces of the rotating brush 49, and these bearings 51 are fitted into fitting portions 52 formed opposite to both ends of the rotating brush chamber 32. By being fitted into the respective rotary brush chambers 32, the rotary brush chamber 32 is rotatably held in the rotary brush chamber 32 facing the suction port on the lower surface thereof. Further, a gear-like pulley 53 is fixed to one end of the rotating brush 49, and this pulley 53 is located within the belt chamber 39.

Reference numeral 54 denotes a turbine rotatably installed in the turbine chamber 35, which includes a disk-shaped end plate 56 successively penetrated into one side of the rod-shaped shaft 55, a turbine body 57, and a disk-shaped end plate 58. It is configured. Both side surfaces of the turbine main body 57 are closed by both end face plates 56 and 58. Further, a bearing 60 is rotatably inserted through the other side of the shaft 55, and a gear-like pulley 61 is fixedly provided at the end.

Since the bearing 60 is supported by the partition walls 33 and 38 on both sides of the turbine holding chamber 36, the turbine 54 is rotatably held within the turbine chamber 35. At this time, the turbine 54 is rotated in the axial direction of the rotating shaft b and the partition wall 3 within the turbine chamber 35.
Therefore, the connecting pipe 43
The end plate 58 of the turbine 54 and the partition wall 34 are deviated toward the partition wall 33 at the opening 46 of the turbine 54
The gap between the opening 41 and the connecting pipe 43 forms an air passage 62 extending from the opening 41 to the connecting pipe 43.

The turbine main body 57 includes a cylindrical tube portion (not shown) through which the shaft 55 is passed, and a plurality of blades 64 projecting radially from the side surface of the tube portion and receiving the suction airflow.
is curved toward the tip in a direction opposite to the rotational direction c of the turbine 54. Furthermore, these blades 64 are twisted spirally and are inclined in the rotation direction c of the turbine 54 toward the air passage 62 side with respect to the rotation axis b of the turbine 54.

A belt 65 is stretched between a pulley 61 of the turbine 54 located in the belt chamber 39 and a pulley 53 of the rotating brush 49, and as the turbine 54 is rotated by the suction airflow, A rotary brush 49 is rotatably driven via this belt 65.

Reference numeral 66 denotes a switching knob that is slidably provided in the switching knob chamber 37, and includes a main body 67 in the shape of a rectangular parallelepiped box with an open bottom, and an operating part 68 formed protruding from the upper surface of this main body 67. , the main body part 6
A sliding plate 69 is fixedly provided on the front side of 7. In addition, the main body part 67 has notch-shaped fitting parts 70 formed on both sides thereof to face each other, and semi-cylindrical engagement protrusions extending in the vertical direction on the inner front and rear surfaces. 71 are formed facing each other. Furthermore, a communication port 72 is formed at the tip end side of the sliding plate 69.

On the other hand, a pair of guide walls 73 extending in the left-right direction are provided in the switching knob chamber 37 of the lower case 22.
Three pairs of engagement grooves 74a, 7 extending vertically from the side to the outside and recessed toward the opposing guide wall 73 side.
4b and 74c are formed facing each other. Note that the center engagement groove 74b is closer to the turbine chamber 35 side than the outer engagement groove 74c.
It is formed near the Further, a sliding hole 75 is formed in the upper surface of the upper case 23 and extends in the left-right direction so as to face the guide wall 73 .

The switching knob 66 has its main body 6
The fitting portion 70 of No. 7 is slidably fitted to the guide wall 73, whereby the operating portion 68 is slidably attached in a state protruding from the sliding hole 75. Further, in this state, the sliding plate 69 is slidably abutted against the front surface of the partition wall 31 of the suction port body 21. Furthermore, when the switching knob 66 slides, the engagement protrusion 71 of the main body 67 is engaged with the engagement grooves 74a, 74b, and 74c of the guide wall 73, so that the switching knob 66 is held at a predetermined position. Retained.

When the engagement protrusion 71 engages with the engagement groove 74a on the turbine chamber 35 side, as shown in FIGS.
As shown in the figure, the communication port 72 of the sliding plate 69
However, in the axial direction of the rotating shaft b of the turbine 54,
The turbine 54 of the blades 64 of the turbine 54
The sliding plate 69 covers the opening 41 of the turbine chamber 35, and the engaging protrusion 71 is located in the center. When the communication port 72 is engaged with the engagement groove 74b of the blade 64, as shown in FIG. 2 and FIG. When the sliding plate 69 covers the opening 41 and the engagement protrusion 71 engages with the outer engagement groove 74c in the state facing the sides, as shown in FIG. The sliding plate 69 is located on the side of the opening 41 so that the opening 41 is opened.

Next, the operation of this embodiment will be explained.

When cleaning tatami mats, floors, etc., use the switching knob 6.
6 to open the opening 41 of the turbine chamber 35. At this time, the speed of the suction airflow from the opening 41 becomes small and most of it flows directly into the air passage 62 of the turbine chamber 35, so the turbine 54 is not rotated, and therefore the rotating brush 4
9 doesn't rotate either. Then, while the rotary brush 49 is not rotated in this manner, dust on the floor and the like is sucked in through the suction port.

On the other hand, when cleaning a carpet or the like, slide the switching knob 66 to remove the sliding plate 6 of the opening 41.
9, with its communication port 72 facing the blades 64 of the turbine 54. At this time, the speed of the suction airflow from the communication port 72 increases and is blown against the lower part of the turbine 54, so that the turbine 54 is rotated and the rotating brush 49 is also rotated accordingly. The rotating brush 49 rotated in this way
scrapes out dust from carpets, etc., and this dust is sucked in through the suction port.

When the turbine 54 is rotated by the suction airflow hitting the blades 64 of the turbine 54 in this way, the blades 64 are moved around the rotating shaft b of the turbine 54.
Since the blade 64 is tilted with respect to the axial direction, the timing at which the airflow flowing in from the communication port 41 collides with each position of the blade 64 is shifted, and the noise generated when the airflow hits the blade 64, especially the harshness, is avoided. High frequency sounds are reduced.

Further, the communication port 72 is connected to the blade 6 of the turbine 54.
4, the suction airflow flows over the inclined blade 64 from the upstream side to the downstream side and passes through the entire blade 64.
The suction airflow can be received efficiently, so that the rotational force of the turbine 54 and the rotational force of the rotating brush 49 rotated by the turbine 54 are high.

On the other hand, if it is better to reduce the rotational force of the rotating brush 49 depending on the type of carpet, etc., the communication port 72 may be placed opposite to the downstream side of the blade 64. At this time, since not much suction airflow flows upstream of the blades 64, the turbine 5
4 and the rotational force of the rotating brush 49 decreases.

In this way, the position of the communication port 72 is adjusted to the position of the turbine 54.
The turbine 5
4 and the rotating force of the rotating brush 49 can be adjusted, depending on the condition of the carpet etc.
The rotational force of the rotating brush 49 can be set to an appropriate state.

Although it is preferable to be able to adjust the rotational force of the turbine 54 in this way, generally the rotational force of the turbine 54 can be adjusted.
Since cleaning can be performed more efficiently when the rotational force of the blade is higher, the communication port 72 may be fixed at a position facing the upstream side of the blades 64 of the turbine 54. In any case, by arranging the communication port 72 to face the upstream side of the inclined blades 64, the rotational force of the turbine 54 can be maximized as described above.

〔Effect of the invention〕

According to the present invention, the blade that receives the airflow of the turbine that is rotated by the suction airflow that blows from the suction port of the suction port body through the communication port and that rotationally drives the rotating brush is attached to the shaft of the turbine. Since it is tilted with respect to the direction, the timing at which the suction airflow collides with each position of this blade is shifted, and therefore the noise generated when the suction airflow hits this blade, especially the harsh high-frequency sound, can be reduced. Further, since the communication port is located opposite to the upstream side of the slope of the blade, the suction airflow that collides with the blade passes through the entire blade from the upstream side to the downstream side, so that the suction airflow energy can be efficiently converted into rotational power for the turbine, and therefore,
It is possible to reduce noise without reducing cleaning efficiency.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing one embodiment of the suction port body of a vacuum cleaner according to the present invention, with the communication port facing the upstream side of the blade, and Fig. 2 shows the same communication port facing the downstream side of the blade. Fig. 3 is an exploded perspective view of the above opening in the open state, Fig. 4 is a downward perspective view of the above switching knob, and Fig. 5 shows the communication port upstream of the turbine blade. Fig. 6 is a front view for explaining the operation showing a state in which the communication port faces the downstream side of the turbine blade, and Fig. 7 shows the suction port body of a conventional vacuum cleaner. It is an exploded perspective view showing an example. 21... Suction port body, 35... Turbine chamber, 4
9... Rotating brush, 54... Turbine, 62...
Air path, 64...Blade, 72...Communication port.

Claims (1)

[Scope of Claims] 1. A suction port body that has a suction port opened on the outside and a turbine chamber formed therein and having a communication port that communicates with the suction port, and a suction port body that faces the suction port and is rotatable inside the suction port body. and a turbine that is rotatably provided in the turbine chamber and is rotated by the suction airflow from the communication port and rotationally drives the rotary brush, blades that receive the suction airflow of the turbine. is spirally inclined with respect to the axial direction of the rotating shaft of the turbine, and the communication port is located opposite to the upstream side of the inclination of the blade. 2. The suction port body of a vacuum cleaner according to claim 1, wherein the communication port can change its position in the axial direction of the rotating shaft of the turbine and within a range facing the blade.