JPH0817753B2 - Vacuum cleaner floor suction tool - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a floor suction tool used by connecting to a hose or extension tube of an electric vacuum cleaner.

2. Description of the Related Art Conventionally, one of the floor suction tools of this type is a suction port of a vacuum cleaner disclosed in Japanese Patent Publication No. 55-7253. This suction port is provided with thin shielding plates made of a flexible material such as urethane rubber before and after the suction passage formed at the bottom of the suction port, and is shielded by a roller arranged in front of the suction and a brush arranged behind the suction port. By maintaining the contact dimension between the plate and the floor surface at a predetermined value, almost uniform suction force was obtained over the entire length of the suction port on the floor surface, and high suction performance for the floor surface was obtained.

The problem to be solved by the invention is, however, that when the above-mentioned mouthpiece is used on a carpet or carpet, a brush having a large frictional resistance with the fibers of the carpet or the carpet is used to capture fiber dust such as thread waste and at the same time Since it is necessary to reduce the movement operation force on the carpet, the brush is housed inside the suction port until the tip position of the brush is almost level with the bottom surface of the suction port. On the other hand, since the roller has a small contact area, it is sunk in the fibers of the carpet and carpet. As a result, the contact between the shield plate and the fibers of the carpet and carpet is stronger than in the floor cleaning state, and the brush tip is in contact with the carpet and carpet as much as it captures fibrous dust. The operation force for moving the operation becomes large. In order to solve this, in the suction port, bypass air is made to flow into the suction passage from the upper surface of the suction port to lower the vacuum pressure near the suction passage while sacrificing the suction performance to reduce the moving operation force of the suction port. .

An object of the present invention is to solve this problem and to provide a floor suction tool having high suction performance and a small operating force.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a suction passage that extends along the suction tool bottom portion in a substantially straight line, and extends along the longitudinal direction of the suction passage, and the suction tool bottom portion is provided. The shield plate formed of a flexible material hanging from the floor surface toward the floor surface has a sliding contact body that is in sliding contact with the floor surface by front and rear operation of the suction tool, and the sliding contact body is provided at least on the front side of the suction tool. A thin film having a friction coefficient smaller than that of a flexible material is integrally provided, and a plurality of substantially conical minute projection rows are formed on the surface of the sliding contact body on the suction passage side.

Action In the present invention, the suction member has a sliding contact body that slides in contact with the floor surface by the forward and backward operation, and a thin film having a friction coefficient smaller than that of the flexible material is integrally formed at least on the suction device front side of the sliding contact member. Therefore, even if the suction tool is operated forward on the carpet or carpet, the frictional force between the shield plate and the carpet or carpet fiber can be reduced by the thin film, and the forward operation force can be reduced. Further, since a plurality of substantially conical minute projections are formed on the surface of the sliding contact body on the suction passage side, the minute projections of the sliding contact body can capture the fibrous dust, and as a result,
The brush is completely housed inside the suction tool to eliminate contact with the carpet and carpet, and resistance to the movement operation of the suction tool can be reduced.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
1 to 5, reference numeral 1 is a hose attached to the main body of the vacuum cleaner.
A floor suction tool connected via an extension tube (not shown),
A pipe 2 connected to the extension pipe is rotatably connected to an upper suction tool 4 by a retaining ring 3. Reference numeral 5 denotes a lower suction tool connected to the upper suction tool 4 via a bumper 6 and forms a bottom surface portion of the floor suction tool 1. A suction passage 7 linearly extending in the width direction of the floor suction tool 1 is formed substantially at the center of the lower suction tool 5, and by the suction joint 8 sandwiched between the upper suction tool 4 and the lower suction tool 5, It communicates with the pipe 2.

9 and 10 are shielding plates A and B attached to the lower suction tool 5 over the entire length in the width direction of the floor suction tool 1 before and after the suction passage 7.
Then, the sliding contact piece 11 made of urethane rubber and having a T-shaped cross section and this sliding contact piece
It is composed of a nylon thin film 12 adhered to the front side of the floor suction tool 11 and a cover 13 wrapped around the sliding contact piece 11. Further, on the suction passage 7 side of the shielding plate A9, a substantially conical sliding contact projection row 14 that vertically projects from the surface of the sliding contact piece 11 is integrally formed.

Reference numeral 15 is a brush arranged behind the shielding plate B10, and by depressing the pedals A16 and B17 arranged on the upper surface of the floor suction tool 1, the lever 18 is rotated to move the brush to the bottom surface of the floor suction tool 1. It is held so that it can appear and disappear freely. That is, when the pedal A16 is stepped on, the brush 15 projects from the bottom surface of the floor suction tool 1, and the floors, tatami surface and bottom surface are predetermined by the rollers 19 arranged at both front front end portions of the floor suction tool 1. Keep the space between and clean the floor and tatami mats. On the contrary, when the pedal B17 is depressed, the brush 15 is submerged in the floor suction tool 1 and the carpet is cleaned.

 Next, the operation and action of the above configuration will be described.

First, when cleaning the tatami mat or the floor surface, the pedal A16 is depressed and the brush 15 is used in a state of protruding from the bottom surface of the floor suction tool 1. At this time, the shielding plates A9 and B10 are in a state of slightly contacting the cleaning surface, and a relatively uniform vacuum pressure can be obtained over the entire length of the suction passage 7. Further, in tatami mat cleaning, the contact between the tatami mat and the shield plate A9 and the shield plate B10, which are sucked by the vacuum pressure and the suction airflow, becomes large, and especially when the floor suction device 1 is pushed forward, Since the force pressing against the surface works, the operating force is larger than that for cleaning the floor surface, but the thin film 12 having a smaller friction coefficient than the sliding contact piece 11 adhered to the sliding contact piece 11.
As a result of sliding on the tatami mat, you can operate it as lightly as when cleaning the floor.

Next, when cleaning the carpet and the carpet, the pedal B17 is depressed and the brush 15 is accommodated in the floor suction tool 1 for use. In this state, the shielding plates A9 and B10 come into contact with the carpet or carpet surface more strongly than when cleaning the floor or tatami mat, but like the tatami mat cleaning, the thin film 12 can be used with a light operating force. Further, the sliding contact projection row 14 formed on the suction passage side of the sliding contact piece 11 of the shielding plate A9 captures the fiber dust adhering to the carpet and the carpet surface when pulling the floor suction tool 1 rearward. It is not necessary to capture fibrous dust by means of 15, and therefore, the brush 15 is completely housed in the floor suction tool 1 so that the operation resistance due to this, particularly the strong operation resistance during forward operation, is eliminated, and it can be used more lightly. Is.

Although the thin film 12 is formed only on the front surface of the sliding contact piece 11 in the above embodiment, it may be formed on both the front and rear surfaces of the sliding contact piece 11. In this case, the operation force when the floor suction tool 1 is moved backward can be reduced. (However, since the user pulls it in the direction of the hand in the reverse direction, the floor suction tool 1 tends to float obliquely upward and rearward from the cleaning surface, and the operation force does not require the thin film 12 as compared with the case of pushing forward. It is not heavy.) By the way, if only to reduce the operating force, the sliding contact piece 12
It is conceivable that the material itself is made of a material with a low coefficient of friction such as nylon or Teflon, but in this case, because the rigidity of nylon or Teflon is high, the flexural deformation of the sliding contact piece 11 is less likely to occur, and the phenomenon of tension occurs On the contrary, the operating force becomes large.

Further, the shielding plates A9 and B10 are provided before and after the suction passage 7. However, in the first invention, the effect is reduced even if they are provided only on one of the suction passages 7, but the same effect is obtained and is limited. is not.

As described above, the present invention is provided with a suction passage extending substantially linearly in the bottom portion of the suction tool, along the longitudinal direction of the suction passage, and from the bottom portion of the suction tool toward the floor surface. By forming a thin film having a friction coefficient smaller than that of the flexible material at least on the front side of the suction tool integrally with a shield plate formed of a suspended flexible material, the shield when used on a carpet or carpet The frictional force between the board and the carpet or carpet fiber can be minimized with a thin film having a small friction coefficient, and the movement operation force can be reduced.

In addition, by forming a substantially conical array of minute projections on the suction passage side surface of the shield plate, the shield plate itself can capture the fibrous dust, and as a result, the brush is completely stored inside the suction tool. It is possible to reduce the operation force of the floor suction tool by eliminating the contact with the carpet and the operation resistance of the brush against the movement operation of the suction tool.

[Brief description of drawings]

FIG. 1 is a central sectional view of a floor suction tool in an embodiment of the present invention, FIG. 2 is a sectional view of a shield plate A, FIG. 3 is a sectional view of a shield plate B, and FIG. 4 is a floor suction tool. The bottom view and FIG. 5 are perspective views seen from above. 7 ... Suction passage, 9 ... Shielding plate A, 10 ... Shielding plate B, 11
…… Sliding contact piece, 12 …… Thin film, 14 …… Sliding contact projection row.

Claims (1)

[Claims] 1. A suction material which is provided along a substantially straight line at the bottom of the suction tool, is provided along a longitudinal direction of the suction path, and is made of a flexible material which hangs from the bottom of the suction tool toward a floor surface. The formed shielding plate has a sliding contact body that makes sliding contact with the floor surface by the forward and backward operation of the suction tool, and a thin film having a smaller friction coefficient than the flexible material is integrated at least on the front side of the suction tool of the sliding contact body. And a suction member for a floor of an electric vacuum cleaner in which a plurality of substantially conical fine projection rows are formed on the surface of the sliding contact body on the suction passage side.