JPH0137143B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating brush suction port for a vacuum cleaner,
In particular, the present invention relates to a rotating brush suction port suitable for effectively cleaning not only carpets but also floors and tatami mats with sufficient suction power.

[Conventional technology and its problems]

Conventional rotating brush suction ports were designed primarily for cleaning carpets, and the goal was to maximize the dirt scraping effect of the rotating brush body. Therefore, there are various problems when cleaning bare floors and tatami surfaces with this rotating brush suction port.
It has the disadvantage that it does not produce satisfactory results compared to ordinary floor and tatami suction spouts, and this is one of the reasons why rotating brush suction mouths have not become popular in Japan, where the surfaces to be cleaned are diverse, such as floors, tatami mats, and carpets. It was hot. The main disadvantages are that the rotating brush body that rotates at high speed scratches the floor surface, and there is no means to effectively sweep the floor and tatami surface to collect dust.
The purpose was to blow away sand, garbage, etc.

The device described in Japanese Patent Application Laid-Open No. 117455/1980 is equipped with a rotary brush, has a retractable floor brush, and has small wheels arranged on both sides of the floor brush. This type of small wheel has an axle that passes through an axle hole drilled in a support plate.
A support structure is adopted in which this shaft end is fixed with a fastener such as a washer. Therefore, a separate member is required to attach the small wheel, and a tool is required to attach the stopper, resulting in problems such as an increase in the number of parts and poor workability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotating brush suction spout in which a small wheel that maintains a predetermined distance between the brush and the surface to be cleaned can be reliably and easily assembled to the suction mouth main body.

[Means for solving problems]

In order to achieve the above object, the present invention includes a rotating brush body rotated by a drive source provided in a suction mouth main body, a switching lever for stopping and starting the rotation of the rotating brush body, and stopping the rotation of the rotating brush body. A floor brush body that protrudes from the lower surface of the suction mouth body in conjunction with the switching lever and retracts when the rotating brush body is driven is provided at the rear of the suction port, and small wheels are arranged on both sides of the floor brush body. In the rotating brush suction port, a lower case on both sides of the floor brush body includes an elastic beam extending in the front-rear direction where both the brushes are arranged and having one end fixed, and a box-shaped wheel cover inside the elastic beam. A notch with an open bottom side of the mouthpiece body is formed in the side wall of the wheel cover facing the elastic beam, and a notch is formed at the lower end of the elastic beam opposite to the vicinity of the open end of the notch. A locking portion having a guide surface inclined toward the upper end is formed, and the length of the axle of the small wheel is approximately the same as the inner gap of the elastic beam, and the guide surfaces of the locking portion of the elastic beam are mutually connected to each other. This is set larger than the interval.

[Effect]

Insert the axle of the small wheel into the notch of the wheel cover from the bottom surface of the lower case, and push both ends of the axle along the guide surface of the locking part of the elastic beam. Then, the elastic beam is pushed and expanded by the axle end, and the axle is inserted into the notch. Thereafter, the elastic beam is returned to its original position, the axle is locked by the locking portion of the elastic beam, and the small wheel is attached to the lower case. In this installed state, the small wheels are
Movement in the axle direction is regulated by the elastic beam, and movement in the direction perpendicular to the axis is regulated by the notch and the locking part of the elastic beam, allowing stable cleaning with the rotating brush or floor brush.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a suction main body, which is equipped with an electric motor 8, a rotating brush body 13, a duct 50, etc. inside, a suction port 34 and an auxiliary suction port 35 are opened at the lower front part, and these suction ports and the duct 50 are opened at the rear part. A connecting pipe 5 is installed which communicates with the main body 1 through the main body 1 and is rotatably connected to the main body 1 in the front-rear direction. The connecting pipe 5 is configured to be directly connected to the vacuum cleaner main body by a clamp portion or to an extension pipe (not shown) continuous to the vacuum cleaner main body. In addition, wheels 122, 12 are provided on the lower surface of the mouthpiece main body 1 at the rear.
3. A pair of small wheels 126, 127 are provided at symmetrical positions on the side of the floor brush behind the suction port 34. Furthermore, a floor brush body 57 is provided behind the suction port 34 on the lower surface of the suction body 1 . Brush portion 85 of floor brush body 57
is a switching lever 6 provided on the top surface of the mouthpiece body 1.
By the operation 9, the floor brush 86 is rotated backward by about 90 degrees in the floor brush storage part 59, and the floor brush 86, which is planted in a straight line on the lower surface, is stored from downward to rearward. A flexible plate 44, which will be described later, is installed on the front lower surface of the suction port 34.

The mouthpiece body 1 includes an upper case 2 that constitutes the upper surface, side surfaces, and front and rear surfaces, a lower case 3 that constitutes the main part of the lower surface and a part of the front and rear sides of the side surfaces, and a joint cover that covers the attachment part of the connecting pipe 5 on the lower surface. Consisting of 4 parts, lower case 3
and a joint cover 4 are each fixed to the upper case 2 with a plurality of screws. electric motor 8 in the mouthpiece body 1;
Built-in parts such as the rotating brush body 13 and the duct 50 are
By combining the upper case 2, the lower case 3, and the joint cover 4, they are held together by being sandwiched.

The electric motor 8 is held within a motor support wall 10 within the mouthpiece body 1 via vibration-proofing rubbers 9a and 9b, and a small pulley 12 is screwed onto the tip of a rotating shaft 11. The rotating brush body 13 is the main brush body 1
4 and an auxiliary brush body 15, the main brush body 1
A large pulley portion 16 is formed at one end of the electric motor 8 , and power is transmitted from the small pulley 12 of the electric motor 8 through a belt 17 . In this embodiment, the brush body 1
4. The large pulley portion 16 is made of resin molded on the brush body shaft 18 by secondary molding. Main brush body 14
The main brush 19 is arranged in a spiral manner, and the main brush body 14 is provided with a hard beating ridge 20 which also projects in a spiral manner on the surface of the main brush body 14. At the other end of the main brush body 14, an integrated brush body shaft 1 penetrating through the main brush body 14 is provided.
8 protrudes for a long time, and a ball bearing 22 is press-fitted through a washer 21. Furthermore, a stepped portion 23 and a left-handed threaded portion 24 are provided at the tip of the brush body shaft 18 that protrudes from the ball bearing 22, and a washer 25 that is engaged with the stepped portion 23 is provided.
The auxiliary brush body 15 is tightened and fixed by a left nut 26 screwed onto the left threaded portion 24 via the left nut 26 . Auxiliary brushes 27 are installed at several locations on the outer circumference of the auxiliary brush body 15. ball bearing 2
2 is covered with a vibration-proofing cover 28 made of rubber, and is held by holding ribs 29a, 29b of the mouthpiece body 1 via this vibration-proofing cover 28. Brush body axis 1
The end portion of the large pulley portion 16 of No. 8 is supported by a flat bearing 30 made of oil-impregnated alloy or the like, and this flat bearing 30 is held within a holding case 32 of the mouthpiece body 1 via a bearing cover 31. The main brush body 14 and the auxiliary brush body 15 of the rotating brush body 13 are separated from the other interior of the suction body 1 by a partition wall 33, and the rotating brush chamber 36 and the auxiliary brush are connected to the suction port 34 and the auxiliary suction port 35 and located above. Located within a chamber 37, the rotating brush chamber 36 is substantially separated from a belt chamber 39 by a side wall 38 through which the main brush body 14 passes. The rotating brush chamber 36 and the auxiliary brush chamber 37 are connected through a communication path 40 behind the holding rib 29a.

The side edge 159 of the suction port 34 has a suction port front edge 46.
Dust introduction groove 16 recessed from the front lower surface of the mouthpiece body, etc.
0 is set. Suction port 34 and auxiliary suction port 3
The bottom surface of the mouthpiece body between 5 and 5 is a concave bridge portion 161 similar to the dust introduction groove 160.

The protection plate 41 is attached to the lower surface of the mouthpiece body so as to form the rear edge of the suction port 34, and is configured to substantially cover the rear part of the large suction port 34. The protective plate 41 is designed to prevent injury if a person accidentally inserts his or her finger into the rotating brush chamber 36 from the suction port 34 by being caught between the striking ridge 20 of the rotating rotating brush body 13 and the rear edge 42 of the suction port. It is made of a flexible elastic body.

The flexible plate 44 is a highly flexible tongue piece with a thin plate strip at the tip that is attached to the front side of the suction port 34, that is, the lowermost front surface of the mouthpiece body 1 so as to protrude downward, and is made of several solid pieces. are arranged at equal intervals with slight gaps 45 in between, and approximately the full width of the suction port 34.
This flexible plate 44 contacts the floor surface when the suction mouth main body 1 is placed on the floor surface, and allows airflow to flow from the front into the suction port 34 through the gap between the suction port front edge 46 and the floor surface. The flexibility serves to control the wind speed at the suction port 34. In other words, when the amount of air generated at the suction port 34 is large, it is greatly bent and lifted upward by the wind pressure, creating a gap G between it and the floor surface 158, ensuring the amount of air and reducing the wind speed, which is generated at the suction port. When the air volume is low, it does not bend much,
Either the gap G with the floor surface 158 is kept small, or the air is allowed to pass through only through the gap 45 in contact with the floor surface to increase the wind speed. Therefore, the suction force related to the wind speed is averaged both when the air volume is high and when the air volume is low, thereby preventing a decrease in the suction power, especially when the air volume is low. The flexible plates 44 are inserted into the front end corners 43 of the lower case 3 of the mouthpiece main body 1 so as to maintain gaps 45, and only their tips are inserted into the lower case 3 through a plurality of slits 47 corresponding to the number of flexible plates. It comes out from the bottom of the. and a plurality of flexible plates 44
is held at the same time by a holding plate fixed to the lower case 3 with screws. In addition, multiple gaps 45
The total width of the suction port 34 is set between 2% and 5% of the width of the suction port 34.

The duct 50 is a pipe with a cylindrical cross section that connects an inlet 51 provided near the auxiliary brush chamber 37 of the rotating brush chamber 36 and an inlet 52 of a connecting pipe 5 rotatably provided at the rear of the suction body 1. Both end portions are in contact with the partition wall 33 and the connecting tube holding wall 53a, respectively. The duct 50 is made by overlapping an upper half piece 54 with a cylindrical cross section and a matching lower half piece 55 with a symmetrical shape, and a spigot 56 is provided at the time of joining to sandwich the upper case 2 and lower case 3. is held as a pipe. 56 is a support rib that supports the central portion of the duct. In FIG. 10, the duct 50 is shown in phantom lines.

The brush part 58 of the floor brush body 57 is installed in a floor brush storage part 59 consisting of a brush cover and the brush wall of the lower case 3, and the shaft parts 60, 6 at both ends
1 is rotatably supported by bearings 62 and 63 of the floor brush storage section 59. The floor brush storage section 59 is provided with a bottom plate end for reinforcement at approximately the center thereof. The shaft portion 61 extends further from the side surface 65 of the floor brush storage portion, and an arm 66 is integrally provided at its tip. At the tip of the arm 66, there is a sliding shaft 6 on the outside.
7. The spring-loaded shaft 68 is almost T-shaped with the arm 66 on the inside.
It is provided in one piece to form a letter shape.

In the embodiment of the present invention, the switching lever 69 is rotatably supported around lever shafts 70 and 71 on both sides by lever bearings 72 and 73 provided on a lever partition provided on the mouthpiece body and surrounding the switching lever portion. The pedal portion 74 is connected to the pedal inlet hole 162.
It is exposed to the outside from the upper surface of the mouthpiece body 1 through the mouthpiece body 1.

A spring holding hole 77 passes through the center of the lever shaft 71, and a substantially L-shaped switch lever 78 is integrally provided at the tip of one lever shaft 70. A brush operating lever 79 is formed integrally with the pedal portion 74 approximately at the center of the lower surface of the switching lever 69, and has a sliding elongated hole 80 at its tip. The sliding elongated hole has a width slightly larger than the diameter of the sliding shaft 67 of the floor brush body 57, and the sliding shaft 67 is fitted into this. By operating the pedal part 74, the sliding shaft 6
7 reciprocates in the sliding elongated hole 80. The lever spring 81 is a torsion coil spring, and one end has a substantially annular end 8.
2. The other end is an L-shaped end 83.
This substantially annular end portion 82 is fitted onto the outer periphery of the spring-loaded shaft 68 of the floor brush body having a retaining protrusion 84.
The tip of the L-shaped end 83 is inserted into the spring holding hole 77 in the lever shaft 71 of the switching lever.
The lever spring 81 connects the switching lever 69 and the floor brush body 5.
7, slide the arm 66 of the floor brush body through the elongated hole 8.
It generates an urging force that presses it downward. Both ends of the lever spring 81 are rotatable around the spring hanging shaft 68 and the spring holding hole 77, respectively. Since the floor brush body 57, the switching lever 69, and the lever spring 81 are configured in this way, first of all, as shown in FIGS.
As shown in the figure, the "yuka/tatami side" of the pedal section 74
When the brush actuating lever 79 is tilted down, the brush operating lever 79 is facing downward, and the arm 66 of the floor brush body 57, which fits into the sliding elongated hole 80 with its sliding shaft 67, is in a substantially horizontal state and is connected to the brush operating lever 79. The brush part 85 is held downward and the floor brush 86 planted in the brush part 85 is made to project downward from the lower surface of the mouthpiece body 1. When cleaning floors and tatami mats, this floor brush 86 comes into contact with the surface to be cleaned and sweeps it, collecting dust and scraping off stuck-on dust. Next, from the state shown in FIG. 5, when the "Jiyutan side" 76 of the pedal section is pushed down, the brush operating lever 79 rotates forward and upward about the center of the lever shafts 70 and 71. (Arrow S in Figure 6) Along with this, the sliding shaft 6
7 slides relatively upward in the sliding elongated hole 80 while compressing the openings at both ends against the biasing force of the lever spring 81, and the arm 66 connected thereto rotates upward around the shaft portion 61. do. (T arrow in Figure 6) As this arm rotates, the integrated brush part 8
5 rotates backward around shaft parts 60 and 61. Then, at approximately the midpoint of the switching operation of the pedal section from the "Yuka/Folding side" 75 to the "Jiyutan side" 76,
The sliding shaft 67 reaches the uppermost position in the sliding elongated hole 80 (imaginary line in FIG. 6), and as the brush operating lever 79 further rotates forward and upward, the sliding shaft 67 reaches the uppermost position in the sliding elongated hole 80.
Rotate the arm 66 further forward while moving back downwards. At this time, the lever spring 81 is in the direction of widening the opening at both ends, and acts to promote the movement of the sliding shaft 67 and the brush operating lever 79. In other words, at approximately the midpoint of switching the pedal section, the lever spring 81 crosses the dead center, and imparts adjustment to the switching of the pedal section 74. When the "Jiyutan side" 76 of the pedal section finally falls down, the state shown in FIG. 7 is reached, the sliding shaft 67 returns to the bottom of the sliding elongated hole 80, and the arm 66 stands upright. The continuous brush portions 85 are held in a position rotated slightly more than 90° rearward and laterally.

Therefore, the floor brush 86 faces rearward, is stored in the floor brush storage section 59, and is pulled in from the lower surface of the suction body 1. Therefore, when cleaning a carpet, the floor brush 86 does not dig into the hair of the carpet, making the mouthpiece difficult to slip or increasing the operating force. In addition, since the side surface 87 of the brush portion 85 is approximately at the same height and on the same surface as the lower surface around the floor brush storage portion of the mouthpiece body 1, a large amount of carpet hair enters the floor brush storage portion 59, and substantially This also prevents the main body from sinking into the carpet and increasing the operating force. 88 is a reinforcing body that constitutes a part of the brush body. On the other hand, the switch lever 78 integrated with the lever shaft 70 of the switching lever 69 moves from FIG. 6 to FIG.
It rotates as shown in the figure, but when the pedal part in Figure 6 is tilted to the "yuka/tatami side", its tip 8
At 9, the actuator plate 91 of the micro switch 90 having a normally closed contact is pressed, and the switch button 92 is pressed to open the circuit of the motor 8 as shown in FIG. It stops rotating. When cleaning the floor or tatami mats, use the main brush 1 of the rotating brush body 13.
9 and the auxiliary brush 27 may flick off dirt on the surface to be cleaned, or the main brush 19 rotating at high speed may
This is because the striking ridges 20 may damage the floor surface. The pedal part 74 is on the "Jiyutan side" 76
When it is down, the switch lever 78 has moved away from the actuator 91, so the switch button 92 has returned to its free position, the microswitch 90 has closed the circuit of the motor 8, and the motor 8 is rotating. , a rotating brush body 13 is driven, and a main brush 19, an auxiliary brush 27, and a beating protrusion 20 work to loosen and stir up dirt deep inside the hair of the carpet. Micro switch 90 is fixed in switch case 93.

The joint pipe 5 is a substantially T-shaped pipe, and has rotating parts 94 and 95 with a cylindrical outer shape extending left and right at the root part.
have. A cylindrical communication pipe 96 is also connected to approximately the center of the rotating parts 94 and 95. The communication pipe 96 communicates with the suction port 52 on the end surface of the rotating part 95 through an elbow pipe part 97 formed in the rotating part 95 on one side. There are sliding flanges 98, 99 on the outer periphery of the left and right rotating parts, which fit into the connecting tube holding walls 53a, 53b of the mouthpiece body 1, and serve as left and right stoppers for the connecting tube. As shown by arrows and imaginary lines in the figure, the connecting pipe 5 can be rotated in the front-rear direction relative to the mouthpiece body 1. The end surface 100 of the rotating portion 95 on the suction port 52 side is
They are in contact with the end surface of the duct 50 on the connecting tube holding wall 53b, and slide while maintaining communication with each other as the connecting tube 5 rotates. The articulating projection 101 is provided on the end face of one of the rotating parts 94, and when the connecting pipe 5 rotates, the connecting pipe 5 is brought to the standing position (imaginary line in FIG. 4) while pushing the projection 103 of the articulating leaf spring 102. to overcome this and prevent the connecting pipe from falling. The rotation of the joint pipe 5 is such that when the joint pipe is in the upright position, the communication pipe 9 is connected to the front wall 105 of the joint mounting recess 104 of the mouthpiece body 1.
When the joint pipe 5 is in the lying position, the communication pipe 96 is regulated by the contact with the receiving part 105 forming the lower surface of the joint mounting recess 104. Stoppers 106 and 107 project from the left and right sides of the communication pipe 96, and contact steps 108 and 109 on the left and right walls of the joint mounting recess 104 to assist in regulating the downward rotation of the joint pipe. Reference numeral 110 denotes a clamp portion provided on the outer surface of the communication pipe 96, and a clamp spring 11
The button 112 energized by 1 appears and disappears.

The power cord 113 has a plug 114 at its tip, and a pusher 115 provided on the rear surface of the mouthpiece body 1.
The ribs 116,1 are drawn into the mouthpiece body through the ribs 116,1.
17, is meanderingly press-fitted and held between the fixed walls 118. This power cord 103 is connected to the motor 8
The lead wire 119 from the micro switch 90 is connected to the lead wire 120 from the micro switch 90 by a crimp terminal 121.

The wheel 122 is attached by fixing the axle 124 to a wheel attachment wall 125 formed by the upper case 2 and the lower case 3. The same applies to the wheels 123.

As shown in FIGS. 1 to 3, the small wheels 126 and 127 are rotatable around an axle 129 within box-shaped wheel covers 128 that are integrally formed on the lower case 3 on both sides of the floor brush body 57. It is constructed of a hard bearing part 130 through which the axle 129 passes, and a soft outer peripheral part 131 fixed to the bearing part. This wheel cover 128 has a pair of notches 134 and 13 that are open on the lower surface side of the mouthpiece body.
5 is formed, and this notch is provided with a width that allows the axle to be fitted. Furthermore, a pair of elastic beams 136 and 137 are integrally molded on the lower case so as to face the side wall in which the notch of the wheel cover 128 is provided. This elastic beam extends in the same direction as the arrangement direction of the rotating brush body 13 and the floor brush body 57, that is, the front-back direction of the mouthpiece body, and one end constitutes a fixed end, and the dimensions of this elastic beam are as follows. As shown in FIG. 3, the length L is larger than the height H, and the height H is set larger than the depth h of the notches 134 and 135. Therefore, in the installed state in which the small wheel is inserted into the notch, both end surfaces of the axle 129 abut against the inner surfaces of the elastic beams.

In addition, the elastic beams 136 and 137 have wheel covers 1
Locking portions 138 and 139 are formed opposite to each other near the open ends of the cutout portions 134 and 135 of No. 28, and the locking portions have guide surfaces 138A and 139A that face the cutout portions and slope inward, Stepped portions 138B and 139B are provided to lock both ends of the axle 129 of the small wheel. To attach the small wheels 126, 127 to the lower case 3, the small wheels 126, 127 are first inserted from below along the notches 134, 135 provided in the side walls 132, 133 of the wheel cover 128. At this time, the length L of the axle 129 is located outside the wheel cover 128 and is smaller than the distance l between the pair of elastic beams 136 and 137 formed integrally with the lower case 3, so the locking portion 138 of the elastic beam ,1
Along the guide surfaces 138A and 139A of the lower case 3, elastic beams are placed left and right (second
(arrow in the figure) Push it upward while expanding it. Then, the axle 129 is connected to the stepped portions 141 and 142 of the elastic beam.
When pushed in, the distance between the two stepped portions is approximately the same as the length L of the axle, so the elastic beams 136 and 137 that had been pushed apart return to their original spacing, and the axle is locked to the stepped portion and pushed downward. will no longer fall. wheel cover 12
Since the notches 134 and 135 of No. 8 are stopped at a height corresponding to the position where the axle 129 is housed in the stepped portions 141 and 142, the axle 129 is located at the upper end of the notches 143 and 1.
44 and is fixed without moving upward. The elastic beams 136 and 137 are connected to the lower surface 14 of the lower case.
0, the axle shaft 129
Even if the distance between the point at which the wheel cover is expanded and the fixed ends 145, 146 is long, the height of the wheel cover 12
It is possible to set the stress generated at the fixed end due to the bending due to the pushing and spreading to be less than the stress limit of the lower case resin material without making it higher than 8.

The electric motor 8 has an internal cooling fan (not shown), which sucks air through an introduction window 150 provided in the front wall 105 of the joint mounting recess 104 and guides it into the inside of the electric motor through an intake port 151 of the electric motor 8. It cools down by itself, passes through an exhaust port (not shown) on the side surface of the pulley 12, similar to the intake port 151, and is discharged from the discharge window 152 provided on the side surface of the oral cavity body 1. Reference numeral 154 denotes a filter provided in the introduction window 150 and the discharge window 152, respectively, to prevent foreign matter and dirt from entering.

Next, the operation of the rotating brush suction port will be explained.

When the vacuum cleaner is operated by connecting the plug 114 of the power cord 113 to the power source, the airflow containing dirt from the surface to be cleaned enters the suction body 1 through the suction port 34 and the auxiliary suction port 35, and enters the rotating brush chamber 36, It enters the duct 50 from the introduction 51 through the auxiliary brush chamber 37, passes through the duct 50, and reaches the suction port 52 of the connecting pipe 5. Then, the dust is sucked into the connected vacuum cleaner through the elbow pipe part 97 of the connecting pipe 5 and the ordinary pipe 96 from the suction port 52, and can be captured. Here, when the surface to be cleaned is a carpet, the pedal portion 74 of the switching lever 69 is turned to the "clothing side" 76. At this time,
The switch lever 78 leaves the actuator 91 of the micro switch 90 and
The circuit of the electric motor 8 is closed and the electric motor 8 is operated,
The rotating brush body 13 is driven and rotated through a belt 17. And the striking ridges 20 of the main brush pair 14
The carpet bristles are beaten and loosened to lift out dirt between the bristles, and the main brush 19 and the auxiliary brush 27 stir up dirt between the bristles for effective cleaning.
At this time, the brush part 85 of the floor brush body 57 rotates backward in conjunction with the switching lever 69, and since the floor brush 86 is stored in the floor brush storage part 59, the floor brush 86 bites into the hair of the carpet and the suction This will not make the slide slippery or increase the operating force excessively. If the surface to be cleaned is a floor or tatami mat, press the pedal part 7 of the switching lever 69.
Defeat 75 on the "Yuka/Tatami side" in #4. At this time, the switch lever 78 pushes the actuator 91 of the microswitch, the microswitch 90 opens the circuit of the motor 8, and the motor 8 is stopped. Therefore, the rotating brush body 13 does not rotate, and dirt on the floor and tatami mats is cleaned only by the suction force of the airflow, and the main brush 19 and the auxiliary brush 27 of the rotating brush body 13 are cleaned.
However, the cleaning efficiency is not reduced by blowing away sand and dirt on the floor and tatami mats, and the main brush 19, beating ridges 20, auxiliary brush 27, etc. that rotate at high speed can be used to scrape the floor surface. It also prevents scratches. At this time, the brush part 85 of the floor brush body 57 rotates downward in conjunction with the switching lever 69, and the floor brush 86 protrudes downward from the floor brush storage part 59. Sweep the tatami surface gently to peel off dirt adhering to the surface and scrape out dirt hidden in depressions to increase the effectiveness of cleaning.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

An elastic beam having a locking part at the lower end is provided in the lower case on both sides of the floor brush body, facing the notch formed in both side walls of the box-shaped wheel cover, and the axle of the small wheel is inserted into the notch. The structure allows the axle to be attached to both ends of the axle while pushing open the locking parts of the elastic beams, making it easy to assemble the small wheel to the mouthpiece body with one touch, resulting in good workability and low production costs. It will be cheaper. In addition, since the elastic beam extends in the front-rear direction where both brushes are arranged and is fixed at one end, sufficient elastic force can be obtained even if the elastic beam is set below the stress limit of the lower case resin material, and it will not come off. This ensures stable operability over a long period of time. Furthermore, since the amount of bounce of the elastic beam, that is, the amount of expansion required to push the axle, can be set arbitrarily by changing the length of the elastic beam, the height of the elastic beam can be kept low and it can be used for belts, etc. Interference with other parts can be avoided and the lower case can be made more compact.

[Brief explanation of drawings]

Fig. 1 is a bottom view of the rotary brush suction main body showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line B-B in Fig. 1, Fig. 3 is a perspective view showing the mounting portion of the small wheel, and Fig. 4
The figure is a longitudinal sectional view of the rotary brush suction body, Figure 5 is an explanatory diagram showing the storage state of the floor brush, Figures 6 and 7 are explanatory diagrams showing the operation of the switching lever, and Figure 8 is an explanatory diagram showing the floor brush switching. Fig. 9 is a top view of the rotating brush main body, Fig. 10 is a cutaway view showing the internal structure of the suction mouth main body, Fig. 11 is an overall view of the vacuum cleaner of one embodiment, and Fig. 12 is the A partial rear view and FIG. 13 are circuit diagrams. 1...Suction body, 3...Lower case, 13...Rotating brush body, 34...Suction port, 57...Floor brush body, 69...Switching lever, 92...Switch button, 126, 127...Small Wheel, 128... Wheel cover, 129... Axle, 134, 135... Notch, 136, 137... Elastic beam, 138, 139
...Slope surface.

Claims (1)

[Claims] 1. A rotary brush body rotated by a drive source provided in a suction body, and a switching lever for stopping and starting rotation of the rotary brush body, which is interlocked with the switching lever when the rotary brush body stops, rotates the suction body. In the rotating brush suction port, a floor brush body that protrudes from the lower surface and is recessed when the rotating brush body is driven is provided at the rear of the suction port, and small wheels are arranged on both sides of the floor brush body. A lower case on both sides of the body is provided with an elastic beam extending in the front-rear direction where the brushes are disposed and having one end fixed, and a box-shaped wheel cover is provided inside the elastic beam, and the elastic beam of the wheel cover is A notch in which the bottom side of the suction body is open is formed in the side wall facing the beam, and a guide surface inclined toward the notch is provided at the lower end of the elastic beam facing near the open end of the notch. The length of the axle of the small wheel is approximately the same as the inner gap of the elastic beam, and is set to be larger than the distance between the guide surfaces of the locking portion of the elastic beam. A rotating brush suction port for a vacuum cleaner.