JP4147551B2 - Vacuum cleaner suction tool - Google Patents

Description

  The present invention relates to a vacuum cleaner suction tool, and more particularly to a floor suction tool provided with a rotating brush, which easily removes corner dust and the like even when the rotating brush dust remover approaches the wall. The present invention relates to a vacuum cleaner suction tool that can be scraped off.

  A conventional vacuum cleaner floor suction tool includes a suction tool body having a suction opening on the bottom surface, a blade that is pivotably provided in front of the opening, and a lower edge of which is in contact with the floor during cleaning. And a buffer that elastically deforms when it hits the wall surface during cleaning and pushes the previous blade to rotate it and separate its lower edge from the floor (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 6-3255 (first page, FIGS. 1 and 2)

  In the above suction tools, only suction by vacuum and wind force is considered, but dust stuck to the floor corner and lint in the corner of the carpet can not be removed by itself, it must be taken directly with a bristle brush It was. When the buffer is elastically deformed and the blade is rotated, and corner dust is removed by a suction tool that separates the lower edge from the floor, the elastic deformation must be increased in order to increase the distance that the blade is separated from the floor. , The device gets bigger. In the case where a large device is provided in front of the suction tool, there is a problem that the suction force of the tip portion is reduced particularly when there is a rotating brush.

  The present invention has been made to solve the above-described problems, and is a floor suction tool provided with a rotating brush. Even when the rotating brush dust remover approaches the wall, corner dust or the like can be easily obtained. It is another object of the present invention to provide a suction tool for a vacuum cleaner that can be surely scraped and prevents scraped dust from scattering forward.

The suction tool of the vacuum cleaner according to the present invention includes a suction tool in which a suction part is formed by upper and lower cases, an opening part having a predetermined width is provided in front of the suction part, and a rotary brush is provided in the vicinity of the opening part. In the vacuum cleaner provided, a buffer made of a soft material , having a substantially concentric arc shape with the rotating brush, and having a vent hole for air conditioning on the front surface is provided in front of the opening, and a lower end of the buffer is provided at the lower end of the buffer. A reinforcing member is formed, and when the buffer comes into contact with a wall or the like, the reinforcing member comes into contact with both sides of the opening to prevent contact between the buffer and the rotating brush .

When the suction tool is pressed against the wall, the dust remover approaches the wall to the thickness of the buffer due to the elastic force of the buffer, and it is possible to reliably remove dust and yarn dust that are usually difficult to remove.
Further, by attaching the reinforcing member to the buffer, it is possible to prevent a failure such as the buffer coming into contact with the rotating brush or being caught.

Embodiment 1
1 is a longitudinal sectional view of a suction tool for a vacuum cleaner according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view of FIG. In the figure, a suction tool 1 of a vacuum cleaner is constituted by a suction portion 2, a connection pipe 3 and a joint pipe 4 located on the downstream side, and a cover pipe 5 is attached to the joint pipe 4.
The suction part 2 is composed of a lower case 7 provided with support cover parts 6a and 6b in contact with the floor surface on both side lower parts, and an upper case 8 covering the upper surface thereof, and a connection pipe 3 located on the downstream side of the lower case 7 It is pinched by these. And the front side and front side lower part of the lower case 7 are opened to form a front side opening part 9 and a lower opening part 10, and the connection pipe 3 forms an air passage 3 a inside thereof to form the opening parts 9, 10. They are connected to each other and further communicated downstream through the joint pipe 4 and the cover pipe 5.

  A rotary brush 11 is rotatably attached to the lower case 7 in the vicinity of the openings 9 and 10 of the suction portion 2, and a dust remover 12 is attached to the outer periphery of the rotary brush 11. And the dust remover 12 rotates in the state which protruded partially outside each opening part 9 and 10 of the suction part 2, so that the rotating brush 11 and the dust remover 12 can be brought close to a wall part. It is. When cleaning the wall, dust is removed by making the dust remover 12 of the rotating brush 11 approach the wall angle directly without relying solely on the degree of vacuum or wind power.

  The support cover portions 6a and 6b attached to the lower case 7 are provided with parts having little friction with the floor surface, such as raised cloths 13a and 13b and wheels (not shown), and the rotating brush 11 and the floor surface. The operability is improved while keeping the positional relationship of these constant. In this case, since the raised cloths 13a and 13b are supported and bonded to the cover portions 6a and 6b, a dedicated part for attaching the raised cloths 13a and 13b can be eliminated, and the number of parts can be reduced. The support cover portions 6a and 6b are provided not only on one side but on both sides in order to facilitate the mounting of the rotating brush 11 and to make the bearing mounting portion of the rotating brush 11 easily visible. is there.

A buffer 14 made of a soft material is attached to the front opening 9 of the suction part 2 in a double structure with the upper case 8 so as to cover it, and solid dust or the like is collected from the front opening 9. It is prevented from scattering forward, and the front opening 9 prevents the degree of vacuum from being ensured, thereby avoiding the deterioration of normal dust removal performance. The buffer 14 is disposed concentrically with the rotating brush 11 on the outer side of the rotating brush 11, and has an arc shape that is substantially the same as the rotating trajectory of the rotating brush 11. In normal use, it hardly contacts the dust remover 12 of the rotating brush 11, smoothing the flow of dust around the rotating brush 11, and the dust scraped up by the rotating brush 11 is connected once. Even if it does not enter the air passage 3a of the pipe 3, it goes around the rotating brush 11 and returns to the air passage 3a again. When the buffer 14 reaches the wall, the elastic force approaches the wall up to its wall thickness, and the dust remover 12 of the rotating brush 11 approaches the wall, so that it is possible to remove dust that is usually difficult to remove.
The lower end of the buffer 14 is an important part for maintaining the degree of vacuum because it is located near the corner when cleaning the corner. For example, the corner 14 is formed in a wave shape to clean the corner. Is to be performed efficiently.

  The buffer 14 is a carpet of 7 mm or less, for example, and is made with a hardness that does not cause large deformation due to suction force (wind force or vacuum) during normal use, so that it does not contact the rotating brush 11 even if deformed. . Further, the wall thickness is almost uniform, it is deformed even at the time of impact, there is no concentration of impact, and the life is extended. A cutout 15 is formed on the side surface of the buffer 14, and the cutout 15 is cut substantially downward from the divided portion of the upper case 8 and the lower case 7, and an elastic force and a shape restoring property are given above the cutout 15. The portion of the notch 15 provides flexibility and shock absorption.

The front surface of the buffer 14 is provided with at least one, usually a plurality of air conditioning vent holes 16. This is to prevent suction to the cleaning surface and to allow ventilation since the bottom of the buffer 14 is buried on the carpet having a long bristle. In addition, when a plurality of air conditioning vent holes 16 are provided, they are formed to be equal or larger as they go to both sides, and a large amount of air from both sides is taken in to form a wind flow from the side to the center. ing. In this way, by adjusting the balance between the central part where the vacuum is high, the wind speed is high, and dust is easily removed, and both sides where dust is difficult to remove, and the amount of air from the side is increased, the dust in the suction device 1 is evenly distributed. I am trying to take it. In this case, it is preferable that the air adjustment vent holes 16 are arranged substantially symmetrically with respect to the air passage 3 a in the connection pipe 3.
In addition, on both sides of the buffer 14, protrusions 17 are provided for reducing an impact when contacting the wall or the like.

  The lower end portion of the buffer 14 is a contact that constitutes a reinforcing member in which a cap 19 is attached to both sides with a substantially circular shaft shape in order to prevent the buffer 14 from coming into contact with the rotating brush 11 toward both sides. A prevention member 18 is provided. As shown in FIG. 7B, even when the buffer 14 is pressed against the front wall, both ends of the contact preventing member 18 are stopped by the hard portions on both sides of the lower case 7, and the rotating brush 11 is not touched. Thus, contact with the rotating brush 11 at the bottom of the buffer 14 can be minimized when contacting a wall or when cleaning on a carpet with long bristle feet, and the cleaning operation is light and lossless. Can do. Even in this case, the lower end of the buffer 14 touches the dust remover 12, but since the dust remover 12 is soft, the resistance is small.

The contact preventing member 18 is made of, for example, hard rubber, plastic, metal or the like, and preferably has as little space as possible in order to reduce the distance between the dust remover 12 of the rotating brush 11 and the wall. For example, as shown in FIG. Thus, the cross-sectional plate-shaped contact prevention member 18a may be sufficient. In consideration of the strength, for example, the contact prevention member 18b having an L-shaped cross section as shown in FIG. 4 may be used, or the contact prevention member 18c having a U-shaped cross section as shown in FIG. It may be.
The contact preventing member 18 does not come into contact with the rotating brush 11 during normal use, but may come into contact with the rotating brush 11 when a force is applied more than necessary. Even in such a case, the contact preventing member 18 must not be permanently deformed, but must have a shape that can be restored to its original shape. Further, in consideration of availability and mounting, it is preferably a shaft shape having a substantially circular cross section. .

Next, the structure of the attachment part when attaching the contact prevention member 18 to the lower position of the back surface of the buffer 14 is demonstrated with reference to FIG. As shown in FIG. 6A, fixing holes 20 are provided at regular intervals below the air conditioning air holes 16 of the buffer 14, and a substantially semicircular arm is formed on the rear surface of the fixing hole 20. The arm support portion 21 is formed integrally with the buffer 14, and a substantially circular arm hole 22 is formed in the center of the arm support portion 21 so as to communicate with the fixing hole 20 located on the front surface. And in the part other than the fixing hole 20, as shown in FIG.6 (b), the contact latching | locking parts 23a and 23b formed in parallel with the up-and-down position of the fixing hole 20 are provided. Further, both end portions of the buffer 14 are provided with both end fixing portions 24 for locking both ends of the contact preventing member 18. In this way, the contact preventing member 18 is passed through the arm hole 22 of the arm support portion 21 and is locked along the contact locking portions 23 a and 23 b, and both end portions thereof are fixed by the both end fixing portions 24. The fixing in this case is performed by adhesion, for example.
The above molding is performed by post-processing of the member, but may be performed by double molding of the member and the soft material.

  The distance between the fixing hole 20 provided in the buffer 14 and the arm support portion 21 is preferably about 30 mm or less in consideration of the stability of the contact preventing member 18. If the distance is 30 mm or more, the integrity of the buffer 14 and the contact prevention member 18 cannot be maintained, and a gap may be formed, causing dust to be clogged. Further, the shape of the fixing hole 20 includes a circle, a quadrangle, and the like. However, the arm shape is easier to form in the horizontal direction than in the vertical direction. Furthermore, since the fixing hole 20 also functions as an air intake hole on a carpet having a long bristle, like the air conditioning vent hole 16, if the area is secured, the independent air conditioning vent hole 16 is not necessary. It can also be unified with the fixing hole 20. Moreover, since the upper part of the arm support part 21 is a place where a bristle brush is easy to contact, it is desirable to form in the shape of a slope like the wave shape mentioned above.

  A rotating brush 11 is rotatably attached to the lower case 7 and is driven by a motor 26 located beside the connection pipe 3 via a belt 25. If the motor 26 is positioned at the lower part of the connection pipe 3, the height of the entire suction tool 1 is increased and the cleaning range is narrowed, or it is lifted upward by a strong suction force and the dust removal performance is reduced. It is not preferable. When cleaning the wall, the motor 26 receives resistance due to contact between the dust remover 12 and the buffer 14, so it is necessary to increase the gear ratio of the motor 26 and the rotating brush 11 to increase the torque. The motor gear should be made as small as possible and the gear of the rotating brush 11 should be made as large as possible. However, the larger the gear, the larger the appearance. By connecting a plurality of gears and using a plurality of belts, the torque is increased and the height of the suction tool is reduced.

  Although it depends on the number of dust removers 12, in the case where the number of dust removers 12 is 8 as an example, the number of revolutions necessary for the rotating brush 11 is desirably 1000 rpm or more from the number of times the dust remover 12 contacts the dust. In the gear configuration, the gear ratio and the number of connections are determined by the rotational speed of the motor 26, motor torque, motor life, and the like. As the number of connections increases, the clearance between the shaft and the bearing increases, and it becomes difficult to manage the distance between the shafts. Therefore, it is better that the number of parts is as small as possible in a portion that receives an impact such as a suction tool. Other factors that can change the distance between the axes include molding variations, deformation due to external pressure, and changes due to temperature.

  In order to make it easy to manage the distance between the shafts, it is preferable that the motor 26 and the bearing of the rotating brush 11 are separated from each other in the form of a gear box, but it is preferable to separate them into separate parts. The height of 1 and the width become larger, the weight becomes heavier, and there are many demilits. Therefore, it is conceivable that the motor gear and the connecting gear are inserted between the upper case 8 and the lower case 7. At that time, the motor core and the connecting gear are made horizontal so that the upper and lower cases 8, 7 A highly accurate suction tool 1 with little change with respect to deformation can be configured.

  The rotating brush 11 has a distance from the floor surface to the rotating brush 11 of 2 to 6 mm, and has a self-propelling force using a short and hard dust remover 12. The rotating brush 11 of the present suction tool 1 has eight or more dust removers 12, of which two are ones having a thickness of 1 to 10 denier for flooring wiping, and 30 to 30 for thread removal. Two 60 denier ones and four 60-80 denier ones for self-propelled use were used. Considering the balance of the rotating brush 11, it is better to arrange the same dust remover 12 symmetrically with respect to the rotating brush 11, so the number is even. The height of each dust remover 12 is 6 to 8 mm for flooring wiping, 8 to 10 mm for thread removal, and 6 to 8 mm for self-running. For self-propelled use, it wraps about 2mm to the floor. With this configuration, it is possible to achieve the suction tool 1 having a high dust removal effect while having a self-running function. As described above, when the rotary brush 11 is considered to have a total of eight dust removers 12 mounted at the same position, four for self-running, two for wiping, and two for thread take-up, the diameter of the rotary brush 11 is φ20 or more. Necessary. Moreover, since the height of suction tool 1 itself will become high when a diameter is large, the axial diameter of the rotating brush 11 shall be (phi) 30 or less, and the upper part height of the rotating brush 11 of the suction tool 1 is suppressed to 50 mm or less.

The operation of the present invention configured as described above will be described. When the motor 26 of the electric vacuum cleaner is driven and the rotary brush 11 is driven, the rotary brush 11 and the dust remover 12 rotate to remove dust and the like, and then suck and remove them. At this time, the buffer 14 Prevents the collected solid debris from splashing forward.
In this way, dust and the like are sucked and removed by the suction tool 1 of the vacuum cleaner, but when the buffer 14 of the suction tool 1 comes into contact with a wall or a carpet with long hairs, the buffer 14 is deformed. In this case, since the buffer 14 is provided with the contact prevention member 18, the deformation range of the buffer 4 is restricted by the contact prevention member 18 and the hard portions at both ends of the lower case 7.

  When the suction tool 1 of the vacuum cleaner contacts the front wall during cleaning, the buffer 4 first hits the front wall. At this time, since the buffer 14 is made of a soft material, it is deformed by acting as a cushion due to its elasticity, and softens the impact of the collision. The shock absorbing force in this case is determined by the material of the buffer 14, the shape of the cutout 15 next to the buffer 14, the wall thickness, and the like.

  Thus, as shown in FIG. 7A, the arcuate outermost diameter of the buffer 14 first comes into contact with the wall and starts elastic deformation. Then, as shown in FIG. 7B, the deformation is continued until the contact preventing member 18 hits the front surface portion 7 a of the lower case 7. When the movement of the contact prevention member 18 stops, the buffer 14 above the contact prevention member 18 continues to be deformed with the contact prevention member 18 as an axis. While the upper part of the contact prevention member 18 is deformed and dented, the contact prevention member 18 serves as a fulcrum, and the lower part of the contact prevention member 18 that is the action point protrudes forward. That is, when pressed against the wall, the lower portion of the buffer 14 moves back and forth. When continuous pressing is performed, the buffer 14 scrapes off dust at the corners of the wall. By this operation, dust on the wall can be further removed. Thus, the buffer 14 finally comes into contact with the wall as shown in FIG.

  During the above operation, the dust remover 12 of the rotating brush 11 approaches the wall while touching the buffer 14, and the dust in front is removed by the dust remover 12 coming out from the lower portion of the buffer 14 and the air conditioning vent 16. To do. Further, the air conditioning vent hole 16 is sealed by the wall, the degree of vacuum in the suction tool 1 is increased, and comes closer to the front wall by closer contact with the front wall, thereby removing dust near the wall.

  According to the present invention, since the contact preventing member 18 for preventing the buffer 14 from coming into contact with the rotating brush 11 is provided, the buffer 14 is pressed against the hair of the carpet even when cleaning the carpet with a long bristle. However, there is no contact with the rotating brush 11 and no force is applied to stop the rotation. Therefore, the current value of the motor 26 increases, the motor temperature rises, and the motor life decreases. There is nothing. Further, when cleaning the wall corner, the buffer 14 is pushed against the wall, the buffer 14 enters the suction tool 1, and the dust remover 12 and the rotating brush 11 are caught, so that the dust remover 12 does not reach the wall corner. Absent.

Embodiment 2
In the first embodiment, the contact preventing member 18 is made of hard rubber, plastic, metal, or the like. However, when it is a metal, the color of the material is determined.
In the present embodiment, the contact preventing member 18 has a color that does not make the dirt noticeable, or conversely, the color that makes the dust stand out and makes it easy to remove the dust. In this case, the contact preventing member 18 is painted to change the color, or the color is changed using a heat shrinkable tube.

Embodiment 3
In the first embodiment, the contact preventing member 18 is adhered to the buffer 14 so as to prevent and be fixed, but in this embodiment, the contact preventing member 18 is positioned and fixed by a press-fit cap.
In addition, when using a press-fit cap, the color can be changed freely, product variations are reduced, and the finish is clean.

Embodiment 4
In the first embodiment, the thickness of the buffer 14 is made uniform, and the deformation at the time of impact is also made uniform. However, in this embodiment, the thickness of the central portion of the buffer 14 is increased or ribs are provided. It is like that.
By doing so, it is possible to cope with a case where there is much contact with the wall portion in the central portion of the buffer 14.

Embodiment 5
In the first embodiment, the buffer 14 has a double structure with the upper case 8, but in this embodiment, the buffer 14 is configured to be detachable. In this case, there are a press-fit fixing method using unevenness, a hook-type fixing method, and the like.
By doing so, even when the buffer 14 is exhausted, the replacement becomes easy.

Embodiment 6
In Embodiment 1, the shape of the lower end portion of the buffer 14 is formed in a corrugated shape. However, in this embodiment, the shape of the buffer 14 is changed to a suede shape, and bristle brush planting is further performed on the lower portion thereof.

Embodiment 7
In the first embodiment, the deformation of the buffer 14 is regulated by the hard portions at both ends of the lower case 7 with which the contact preventing member 18 abuts. However, in this embodiment, the support cover portions attached to both ends of the lower case 7. It is intended to be regulated by 6a and 6b.
For this reason, when the buffer 14 is deformed by abutting against a wall or a carpet having a long bristle, the contact prevention member can be disposed below the axis of the rotary brush 11 and the dust remover 12 is not obstructed. The effect can be exhibited. That is, the buffer 14 does not get caught in the lower part as close to the end of the buffer 14 as possible.
In the above case, if the raised cloths 13a, 13b attached to the support cover portions 6a, 6b are defined as the deformation range by the contact prevention member 18, the raised cloths 13a, 13b absorb the impact and sound, and the suction tool 1, Failure of the contact preventing member 18 and the like can be reduced.

It is a longitudinal cross-sectional view of the suction tool of the vacuum cleaner which concerns on Embodiment 1 of this invention. FIG. 2 is an exploded perspective view of FIG. 1. It is a principal part longitudinal cross-sectional view which shows the other example of a contact prevention member. It is a principal part longitudinal cross-sectional view which shows the further another example of a contact prevention member. It is a principal part longitudinal cross-sectional view which shows another example of a contact prevention member. It is the reverse view of the buffer of FIG. 1, its AA sectional drawing, and BB sectional drawing. FIG. 2 is an operation explanatory diagram of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction tool, 2 Suction part, 6a, 6b Support cover part (floor surface contact member), 7 Lower case, 8 Upper case, 9 Front side opening part (opening part), 12 Rotating brush, 13a, 13b Brushed cloth (floor surface) Contact member), 14 buffer, 18 contact prevention member (reinforcing member), 21 arm support part (support part), 22 arm hole (hole part).

Claims (8)

In the vacuum cleaner provided with the suction tool provided with a suction part provided with a rotating brush in the vicinity of the opening part, the suction part is formed by the upper and lower cases, the front part of the suction part is opened by a predetermined width,
In front of the opening, made of a soft material , formed in a circular arc shape substantially concentric with the rotating brush , provided with a buffer having an air conditioning vent on the front surface, a reinforcing member is formed at the lower end of the buffer, The suction of the vacuum cleaner, wherein when the buffer comes into contact with a wall or the like, the reinforcing member comes into contact with both sides of the opening to prevent contact between the buffer and the rotating brush. Ingredients. 2. The vacuum cleaner suction tool according to claim 1, wherein the reinforcing member is a shaft member having a substantially circular cross section. 3. The vacuum cleaner suction tool according to claim 2 , wherein the shaft member is attached across the width direction of the buffer. The suction tool for an electric vacuum cleaner according to claim 3, wherein movement of the shaft member is restricted on the suction portion side.   5. The vacuum cleaner suction tool according to claim 4, wherein the movement of the shaft member is restricted by hard portions on both sides of the lower case. A floor surface contact member is detachably attached to both sides of the bottom surface of the suction tool so as to also serve as a support cover for the rotating brush, and the movement of the shaft member is regulated by the floor surface contact member. The vacuum cleaner suction tool according to claim 4. Wherein the support portion is provided on the rear surface of the buffer, the suction device of the vacuum cleaner according to any one of claims 1 to 6, characterized in that fitted with the reinforcing member to the support portion. Said support portion in section substantially semicircular shape while supporting the reinforcing member at its inside, the suction device of the vacuum cleaner according to claim 7, characterized in that a hole in the vicinity of the support portion.

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