JPH0790005B2 - Vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly to an improvement of a rotary brush provided in the vacuum cleaner.

[Conventional technology]

An electric vacuum cleaner is provided with a rotating brush located below the suction port of the cleaner body, and it has been widely practiced in the past to plant a brush on the outer periphery of the rotating brush in a spiral shape. By dusting the brush on the outer periphery of the brush, dust on the surface to be cleaned can be efficiently sucked.

In addition to the above configuration, a protrusion parallel to the brush is provided in a spiral shape on the outer periphery of the rotating brush, and the surface to be cleaned such as a carpet is struck by the projection, and dust is struck from the surface to be cleaned, a so-called beater. An electric vacuum cleaner equipped with the same has been previously proposed, and a rotary brush equipped on an electric vacuum cleaner having a spiral brush and a protrusion parallel to the spiral brush on the outer periphery is disclosed, for example, in Japanese Patent Laid-Open No. 166129/1982. Japanese Patent Publication No. 56-1555,
Further, it is disclosed in Japanese Utility Model Publication No. 59-117464.

Here, a conventional example of a rotary brush for an electric vacuum cleaner having a spiral brush and a protrusion parallel to the spiral brush on the outer periphery will be described with reference to FIGS. 11 and 12, and FIG. 11 shows a conventional electric vacuum cleaner. 11 is a front view of the rotary brush 4 for use in the present invention, and FIG. 12 is a sectional view taken along line CC of FIG. 11. In FIGS. 11 and 12, a spiral brush 20 is planted on the outer periphery of the rotary brush 4. Has been done,
Further, in parallel with the brush 20, a spiral protrusion 4a is provided so as to project on the outer periphery of the rotary brush 4. In FIG. 12, reference numeral 21 indicates a brush mounting shaft that is inserted into the rotary brush 4 having a hollow interior.

The conventional example of the electric vacuum cleaner rotary brush 4 having the spiral brush 20 and the projection 4a parallel to the spiral brush 20 on the outer periphery has the above-described configuration, and the spiral brush 20 and the projection 4a parallel to the spiral brush 20 on the outer periphery of the rotary brush 4. The advantages of providing and are as described above.

[Problems to be Solved by the Invention]

However, the rotating brush of the conventional vacuum cleaner is
As shown in the figure, since one protrusion 4a is provided in a spiral shape on the outer periphery of the rotary brush 4, each cross section of the brush 4 was observed with reference to the direction orthogonal to the axial direction of the rotary brush 4. In this case, as shown in FIG. 12, the protrusion 4a caused an imbalance in the weight balance of the rotating brush 4. Therefore, when the rotary brush 4 runs on the surface to be cleaned while the cleaner is operating, the weight imbalance of the spiral protrusion 4a is sequentially displaced in the axial direction of the rotary brush 4, and vibration is generated in the suction body of the cleaner. However, there is a problem that not only the operability of the vacuum cleaner is impaired, but also noise is generated due to vibration.

Further, since the spiral protrusion 4a is wound around the rotary brush 4 only once, it has only one point contact with the surface to be cleaned, and the efficiency of knocking out dust is poor.

An object of the present invention is to solve the above-mentioned problems and to provide an electric vacuum cleaner equipped with a rotary brush that prevents noise caused by vibrations when the cleaner is in operation and that efficiently knocks out dust.

[Means for Solving the Problems]

In order to achieve the above object, a feature of the present invention is that an electric blower has an electric blower, a cord reel, a dust collecting chamber, and the like, and a suction body that sucks dust by the suction airflow of the electric blower. In the vacuum cleaner, the suction body has a brush main body located at a lower portion of the suction main body, and a protrusion spirally arranged on an outer circumference of the brush main body, and is arranged on an outer circumference of the brush main body. The spiral protrusion is divided into a plurality of pieces with respect to the axial direction, and the divided spiral protrusions are symmetrically arranged with reference to a direction orthogonal to the axial direction of the brush main body. The rotary brush is provided with at least a part of the other spiral protrusion on the peripheral surface of the brush main body on which the one spiral protrusion is disposed.

[Action]

According to the present invention, the spiral protrusions spirally arranged on the outer periphery of the brush main body are arranged symmetrically with respect to the direction orthogonal to the axial direction of the brush main body. The weight balance in the cross section can be maintained, and vibration of the suction body that occurs during operation of the cleaner can be prevented.

Further, according to the present invention, the spiral protrusion arranged on the outer periphery of the brush main body is divided into a plurality of pieces in the direction orthogonal to the axial direction so that the surface to be cleaned can be simultaneously contacted at a plurality of points. Therefore, the surface to be cleaned can be hit in the suction opening over a wide range, and the function of the protrusion that knocks out dust can be further improved.

〔Example〕

Hereinafter, the present invention will be described based on an embodiment of FIGS. 1 to 10. FIG. 1 is a partially longitudinal front view of a rotary brush 4 for an electric vacuum cleaner, which is a main part of the present invention. The figure is A in Figure 1.
-A sectional view, FIG. 3 is an external perspective view of the entire cleaner, FIG. 4 is an upright / inclining operation of the main body case 7 with respect to the suction opening 1, and an explanatory view of the positional relationship between the bottom surface of the suction opening 1 and the surface to be cleaned, Fifth
The figure is a vertical side view of FIGS. 3 and 4, FIG. 6 is a lower vertical side view of the mouthpiece indicated by reference numeral 1 and the base frame indicated by reference numeral 26 in FIG. 5, and FIG. 7 is the mouthpiece shown in FIG. 1 is a partially cross-sectional bottom view in which the bottom plate 2 is removed, and FIG. 8 is B of FIG.
-B sectional view, FIG. 9 is an exploded perspective view of the suction port height switching knob 10 and its related parts, and FIG. 10 is a vertical side view of the exhaust duct 43 and its vicinity.

As shown in FIGS. 5 and 6, the suction port 1 of the electric vacuum cleaner
Exposes a part of the rotary brush 4 to the opening 3 of the bottom plate 2, and the rotary brush 4 is rotationally driven via a belt 5 by an electric blower 6 which is a dust suction drive source.

As shown in FIGS. 3 to 5, the main body case 7 has an operation handle 8 above the main body case 7. As shown in FIG. A partial space 9 is provided. Further, as shown in FIG. 4, the main body case 7 is attached so as to be upright and tiltable with respect to the suction opening 1. When the cleaner is not used, the case 7 is attached to the suction opening 1.
To the upright position. In FIG. 4, the symbol W ₁ is
The distance between the bottom surface of the suction port 1 and the surface to be cleaned is shown when the cleaner is used, and the symbol W ₂ indicates the distance between the bottom surface of the suction port 1 and the surface to be cleaned when the cleaner is not used. .

As shown in FIGS. 3 to 8, the main body case 7 is placed upright on the outside of the mouthpiece 1 with respect to the mouthpiece height switching knob 10, which will be described later, a bumper 11 which is a cushioning member for collision with other objects, and the mouthpiece 1. A pedal 12 for tilting movement and a base frame 13 for supporting the body case 7 are provided.

The mouthpiece height switching knob 10 is a knob for adjusting the distance between the bottom plate 2 of the mouthpiece 1 and the surface to be cleaned. As shown in FIGS. 5, 6, and 9, the mouthpiece 10 has a mouthpiece The knob 10 is integrally connected to the height setting cam 14, and the knob 10 is provided with a knob position spring 10a formed by cutting a part of a cylindrical side surface to fix the knob 10 at an arbitrary position. . As shown in FIG. 9, the cam surface of the suction port height setting cam 14 is equally divided in the circumferential direction, and the knob 10 has a plane X, which has a step in the axial direction,
Y and Z are provided, and each plane (X, Y, Z) selectively abuts the front wheel axle 15 as described later.

The front wheel axle 15 is formed in a crankshaft shape as shown in FIGS. 7 and 9, and both end portions 15a, 15a thereof are rotatably supported by the suction port 1 as shown in FIG. Has been done,
Further, front wheels 16, 16 for adjusting the suction port height are attached to both ends 15a, 15a of the axle 15.

In FIG. 9, 17 indicates a wheel push-out lever, and the lever 17
As shown in FIGS. 6 and 7, one end of the lever is pivotally attached to the mouthpiece 1, and the other end of the lever 17 is engaged with the lever engaging step portion 18 of the main body case 7. Yes, lever 17
As shown in FIGS. 7 and 9, is in contact with one end portion 15a of the front wheel axle 15 at the intermediate portion of the lever 17.

As shown in FIGS. 5, 6, and 7, a rotating brush 4 is attached to the front end portion of the suction port 1, and as shown in FIG. The brush 4
A drive pulley 19 for rotating the is provided. Also,
As shown in FIGS. 1 and 2, a brush 20 and a protrusion 4a are spirally provided on the outer periphery of the rotary brush 4. Therefore, in the present invention, the spiral protrusions 4a protruding from the outer periphery of the rotary brush 4 are symmetrically arranged with respect to the direction orthogonal to the axial direction of the brush 4, and each of the rotary brushes 4 is arranged. The spiral protrusion 4a is divided into a plurality of pieces based on the axial direction of the brush 4, and each spiral protrusion 4a of the rotary brush 4 is shared over the entire length of the brush during brush molding. In the illustrated embodiment, at least one spiral brush 20 is interlockedly provided in a projecting manner in the undercut non-molding area of the rotary brush 4 in the longitudinal direction of the rotary brush 4. In the example, as shown in FIG. 2, the spiral protrusions 4a, 4a are arranged symmetrically with respect to the direction orthogonal to the axial direction of the rotating brush 4. Further, as shown in FIG. 1, the spiral protrusion 4a of the rotary brush 4 is provided with three pieces protruding from the front portion of the brush 4 and three pieces protruding from the rear portion of the brush 4 with reference to the axial direction of the brush 4. .
Further, as shown in FIG. 1, a single brush 20 shown by a spiral angle θ in FIG. 2 is continuously planted over the entire length of the rotary brush 4 and located between the protrusions 4a and 4a. . In addition, since the brush 20 is planted on the outer periphery of the rotary brush 4, it is necessary to make the wall thickness relatively thick. For the rotary brush 4 having a thick wall, for example, a plastic material mixed with a foaming agent is injection molded Can be easily obtained. First
As shown in FIG. 2, FIG. 5, FIG. 5 and FIG. 6, the rotary brush 4 has a hollow interior, and the brush mounting shaft 21 is inserted into the hollow interior. ,
As shown in FIG. 1, both ends of the brush mounting shaft 21 are
It is pivotally supported by 2,22. Further, bearing covers 23, 23 and caps 24, 24 are attached to the outside of the bearings 22, 22, and the rotary brush 4 is attached to the suction port 1 via the caps 24, 24. Then cap 24
The lip portion 24a, which is provided so as to protrude inside, prevents dust from entering the bearing 22 from the outside. 2 in Fig. 1
5, 25 indicates a thrust spring, and the thrust spring 25 is a bearing 22.
And a bearing contact surface of the rotating brush 4,
Adjust the axial play of the rotating brush 4.

5 to 8, a base frame 26 is provided at the rear end portion of the mouthpiece 1, and the case rotation shaft 27 of the main body case 7 is as shown in FIGS. 7 and 8. , A semi-circular bearing rib 28 provided on the mouthpiece 1 and the base frame
It is rotatably supported by a semi-circular bearing portion 29 provided on the shaft 26.

As shown in FIG. 7, rear wheels 30, 30 are mounted near the rear end of the base frame 26, and the base frame 26 is provided with the rear wheels 30, 30, as shown in FIGS. The lock arm locking portion provided on the main body case 7
A lock arm 32 to be locked to 31 is attached, and the lock arm 32 is fixed to the main body case 7 by a spiral spring 33 wound around the cylindrical portion 32a with the cylindrical portion 32a of the arm 32 as a rotation axis. It is biased toward the lock arm locking portion 31 side. Further, the lock arm 32 is provided with a flat surface portion 32b that comes into contact with the lower end of the pedal 12 when the pedal 12 attached to the suction mouth 1 via the support shaft 34 is depressed. When the lock arm 32 of the frame 26 and the lock arm locking portion 31 of the main body case 7 are unlocked and the pedal 12 is released, the main body case 7 is placed at an arbitrary position as shown by the solid line and the chain line in FIG. The base frame 26 has a belt protection cover 35 attached to the side where the belt 5 is suspended, as shown in FIG. The dust passage in the suction port 1 communicates from the suction duct indicated by reference numeral 36 in FIG. 7 to the main body duct in the main body case 7 indicated by reference numeral 37 in FIG.

In FIG. 5, the main body case 7 is roughly divided into three spaces, that is, an electric blower chamber 38, a dust collection space 9 and a cord reel chamber 39.

In the electric blower room 38, the electric blower 6, the exhaust port 40,
Intake duct 42 having a suction port 41 connected to the dust collection space 9
Further, as shown in FIG. 10, an inlet 44 of the exhaust duct 43 communicating with the cord reel chamber 39 is provided. In FIG. 5, a lighting lamp 45 and a reflecting plate 47 having a lamp holder 46 are attached to the intake duct 42, and the light of the lighting lamp 45 is provided on the front wall of the electric blower room 38. It is irradiated to the outside from the lamp window 48 (see FIG. 3).

A main body duct 37 is arranged along the back surface in the dust collecting portion space 9, and an opening 49 of the main body duct 37 has a main body case 7 through an airtight packing 50 and a filter base 51.
Is attached to. Filter 52 for collecting dust
Is formed of, for example, paper or cloth, and its mouth 53
Is engaged with the filter holder 54, and the filter holder 54 is detachably attached to the filter base 51.
The airtightness in the dust collecting portion space 9 is maintained between the dust collecting portion packing 55 provided around the dust collecting portion space 9 and the airtight rib 56a provided on the front lid 56, and the dust is collected when the electric blower 6 is operating. Part space 9
The inside becomes negative pressure. The purpose of the front cover 56 is to notify when the dust collected in the filter 52 is discarded, and to prevent a decrease in air volume due to excessive dust collection, and thus to prevent a temperature rise due to insufficient cooling of the electric blower 6. As shown in FIG. 3 and FIG. 5, a dust meter 57 having a function of flowing a bypass airflow from the outside is attached, and as shown in FIGS. A clamp 58 for removably locking and is attached.

A cord reel 60 for winding the power cord 59 and an outlet 61 of the exhaust duct 43 as shown in FIG. 10 are provided in the cord reel chamber 39, and a power transmission line from the cord reel 60 to the electric blower 6 is provided. The 62 is connected through the inside of the exhaust duct 43. As shown in FIG. 3, a power switch 63 and a cord reel button 64 are arranged at the upper end of the cord reel chamber 39. Here, the exhaust duct shown by reference numeral 43 in FIG. 10 is constituted by the main body case 7 and the duct lid 65, and in FIG. 5, the cord reel chamber 39 is
It is composed of a main body case 7 and a reel lid 66. In FIG. 5, a cord reel 60 is attached to the reel lid 66, and in the event that the power cord 59 is broken and needs to be replaced, the contact piece 67 and the main body provided in the cord reel 60. By removing the power cord 59 at the portion with the ring-shaped contact 69 provided on the reel support base 68 on the case 7 side, the power cord 59 can be replaced without touching the power transmission line 63 connected to the contact 69. It can be done easily. It should be noted that, as shown in FIG. 3, the tip of the operation handle 8 attached to the upper end of the cord reel chamber 39 is made of a soft material in consideration of the impact mitigation in the case where the body case 7 unexpectedly falls backward. A handle cap 70 molded in is attached.

The configuration of the electric vacuum cleaner including the rotating brush 4 according to the present invention is as described above. Next, the overall operation system of the electric vacuum cleaner described above will be described.

When using the vacuum cleaner, first pull out the power cord 59 from the cord reel 60, connect it to the power source, and suck
By depressing the pedal 12 provided at the rear part of the main body case 7 and tilting the main body case 7 with respect to the suction port 1, the operation handle 8 is set at a position where it is easy for the operator to clean.

Next, when the power switch 63 is turned on, the electric blower 6 is operated, and the brush 4 is rotated via the belt 5 together with the suction action of the blower 6. At this time, the rotation operation of the knob 10 causes X of the cam surface of the suction port height setting cam 14.
When the surface is in contact with the front wheel axle 15, the amount of protrusion of the suction wheel height adjusting front wheels 16, 16 protruding from the bottom plate 2 is minimum (6th
It becomes the position shown by the solid line in the figure), which is ideal for cleaning when the length of the carpet is short. On the other hand, when the length of the carpet is long or medium, if the Y-cam surface or the Z-cam surface of the suction port height setting cam 14 is brought into contact with the front wheel axle 15 by switching the knob 10. Since the amount of protrusion of the suction wheel height adjusting front wheels 16, 16 protruding from the bottom plate 2 is changed in two steps, cleaning can be performed according to the length of each of the above-mentioned hairs. Here, the rotation operation of the mouthpiece height switching knob 10 will be described below. That is, when the body case 7 that has been tilted up to that point is made to stand upright with respect to the mouthpiece 1, the lever engaging step portion 18 of the body case 7 is moved by the turning operation.
The wheel push-out lever 17 protruding from the side is pushed down. When the lever 17 is pushed down, the crank-shaped front wheel axle 15 that has been in contact with the lever 17 is rotated by a certain angle,
Both ends 15a, 15a of the wheel 15 are pushed down to separate the suction port height setting cam 14 from the front wheel axle 15, and by the above operation, the knob 10 can be rotated with a light touch in a desired direction. it can. When the main body case 7 is tilted again with respect to the suction opening 1 after the knob 10 is rotated, the lever engaging step portion 18 of the main body case 7 is also rotated and the wheel pushing lever protruding from the suction opening 1 side. It is needless to mention again that the predetermined cam surface of the suction port height setting cam 14 and the front wheel axle 15 are brought into contact with each other by making 17 free.

When the electric blower 6 is operated, the air flow containing a large amount of dust passes through the opening 3 provided in the bottom plate 2 of the suction port 1 and then further through the suction duct 36 and the main body duct 37, It flows into the filter 52, and is separated and filtered into a clean air flow and dust by the filter 52, and only the clean air flow passes through the suction port 41, the intake duct 42, and the electric blower 6 to remove the clean air flow. A part is discharged to the outside of the machine through the exhaust port 40. The remaining clean air flow is guided to the cord reel chamber 39 through the inlet 44 of the exhaust duct 43, and the clean air flow guided to the cord reel chamber 39 is provided in the power cord 59 and the cord reel 60. The contact piece 67, the ring-shaped contact 69 provided on the reel support 68, and the like are cooled and then discharged to the outside of the machine.

Therefore, in the present invention, the spiral protrusion 4a protruding from the outer circumference of the rotary brush 4 is divided into a plurality of pieces based on the axial direction of the brush 4, and each spiral protrusion 4a of the rotary brush 4 is divided. Is formed so as to project into the undercut non-molding region of a pair of molds that are shared over the entire length of the brush when the brush is molded. Therefore, the conventional rotary brush of this type shown in FIGS. 11 and 12 is made of a plastic material. As in the case of molding with, the mold is divided into four in the axial direction of the rotary brush 4 to be molded (see symbols a to d in FIG. 11),
The above-mentioned mold divided into four is divided into four directions (12th
No need to open in the figures), the structure of the mold is simplified, the cost required for mold manufacture is reduced, and the number of molding steps of the rotary brush 4 is also small. Contributes to cost reduction. In addition, in the present invention, since the spiral protrusions 4a protruding from the outer circumference of the rotating brush 4 are symmetrically arranged with respect to the direction orthogonal to the axial direction of the brush 4, the weight of each cross section of the rotating brush 4 is reduced. Balance is maintained. Therefore, when the rotating brush 4 rotates and travels on the surface to be cleaned during operation of the cleaner, it is possible to prevent vibration from occurring in the portion of the suction port 1 to which the brush 4 is attached, and also to prevent generation of vibration noise. can do.

In the illustrated embodiment, the spiral protrusions 4a of the rotary brush 4 are provided on the front side of the brush 4 with three pieces and on the rear side with three pieces protruding from the axial direction of the brush 4, so that the cleaner operation can be improved. At this time, the spiral protrusion 4a of the rotating brush 4 is
They are in contact at the same time at the points, and thus,
When the spiral protrusions 4a of the rotating brush 4 are brought into contact with the surface to be cleaned at a plurality of points at the same time, the function of the protrusions 4a as a so-called beater that knocks out dust from the surface to be cleaned is more remarkable. It will be

〔The invention's effect〕

As described above, according to the present invention, the spiral protrusions spirally arranged on the outer periphery of the brush main body are arranged symmetrically with respect to the direction orthogonal to the axial direction of the brush main body. The weight balance in each cross section of the rotating brush can be maintained, and the vibration of the suction body that occurs during operation of the cleaner can be prevented.

Further, according to the present invention, the spiral protrusion arranged on the outer periphery of the brush main body is divided into a plurality of pieces in the direction orthogonal to the axial direction so that the surface to be cleaned can be simultaneously contacted at a plurality of points. Therefore, the surface to be cleaned can be hit in the suction opening over a wide range, and the function of the protrusion that knocks out dust can be further improved.

[Brief description of drawings]

1 to 10 show an embodiment of the present invention. FIG. 1 is a partially longitudinal front view of a rotary brush 4 for an electric vacuum cleaner, which is an essential part of the present invention, and FIG. AA sectional view, FIG. 3 is an external perspective view of the entire vacuum cleaner, FIG. 4 is an upright / tilting operation of the main body case 7 with respect to the suction opening 1, and an explanatory view of the positional relationship between the bottom surface of the suction opening 1 and the surface to be cleaned. 5, FIG. 5 is a vertical side view of FIGS. 3 and 4, and FIG. 6 is a suction port and a reference numeral shown in FIG.
FIG. 7 is a side view of the lower part of the lower part of the base frame shown in FIG. 26, FIG. 7 is a partially cross-sectional bottom view in which the bottom plate 2 is removed from the mouthpiece 1 of FIG. 5, and FIG. 8 is a sectional view taken along line BB of FIG. FIG. 9 is an exploded perspective view of the mouthpiece height switching knob 10 and its related parts, FIG. 10 is a vertical side view of the exhaust duct 43 and its vicinity, and FIG. 11 is a rotary brush 4 for a conventional vacuum cleaner. FIG. 12 is a sectional view taken along line CC of FIG. 1 ... Suction port, 4 ... Rotating brush, 4a ... Spiral protrusion, 6
...... Electric blower, 7 …… Main body case, 8 …… Operating handle, 9 …… Dust collection space, 13 …… Base frame, 16 ……
Front wheel for adjusting mouthpiece height, 20 …… brush, 30 …… rear wheel, 36
…… Suction duct, 37 …… Main body duct, 38 …… Electric blower room, 39 …… Cord reel room, 42 …… Intake duct, 43 ……
Exhaust duct, 52 ... Filter.

Claims (4)

[Claims] 1. An electric vacuum cleaner having a cleaner body having an electric blower, a cord reel, a dust collection chamber, etc., and a suction body for sucking dust by a suction airflow of the electric blower, wherein the suction body has a suction port. A brush body located at the bottom of the body,
A spiral protrusion provided on the outer periphery of the brush main body, and the spiral protrusion disposed on the outer periphery of the brush main body is divided into a plurality of pieces in the axial direction, and each divided spiral -Shaped protrusions are symmetrically arranged with reference to a direction orthogonal to the axial direction of the brush main body, and one of the divided spiral protrusions is disposed on the peripheral surface of the brush main body. An electric vacuum cleaner comprising: a rotating brush on which at least a part of the spiral protrusion is provided. 2. The electric vacuum cleaner according to claim 1, further comprising a rotary brush in which at least one spiral brush is planted in a longitudinal direction of the brush main body. Machine. 3. An electric vacuum cleaner having a cleaner body containing an electric blower, a cord reel, a dust collection chamber, etc., and a suction body sucking dust by the suction airflow of the electric blower, wherein the suction body has a suction port. A brush body located at the bottom of the body,
A spiral protrusion provided on the outer periphery of the brush main body, and the spiral protrusion disposed on the outer periphery of the brush main body is divided into a plurality of pieces in the axial direction, and each divided spiral -Shaped protrusions are symmetrically arranged with reference to a direction orthogonal to the axial direction of the brush body, and both ends of each of the divided spiral protrusions are relative to the axial direction of the brush body.
An electric vacuum cleaner comprising a rotating brush arranged on the same line. 4. The electric vacuum cleaner according to claim 3, further comprising a rotary brush in which at least one spiral brush is planted in a longitudinal direction of the brush body. Machine.