JPH064868Y2 - Vacuum cleaner air flow adjustment device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air volume adjusting device for a vacuum cleaner, and more particularly to reducing air leakage in the air volume adjusting device.

2. Description of the Related Art Conventionally, an air volume adjusting device for an electric vacuum cleaner of this type disclosed in Japanese Patent Laid-Open No. 56-109635 has, for example, one of the connecting pipes 21 provided at the tip of a hose as shown in FIG. An opening 22 is provided in the portion, and a ring-shaped valve body 24 of a substantially perfect circle having a notch 23 in a part thereof is rotatably press-fitted into the connection pipe 21, and the valve body 24 is operated to operate the opening 22. Open the
It was a closed structure.

However, in the above configuration, since the ring-shaped valve body 24 is almost a perfect circle, the amount of expansion (that is, the curvature) of each part of the ring-shaped valve body 24 when press-fitted into the connection pipe 21 is described. Radius change amount)
Is a large change in the inner radius curvature radius of the side facing the notch around the substantially center point, the change in the valve body inner radius curvature radius of the notch side from the substantially center point is not uniform in each part,
As a result, there is a problem that a slight gap t is generated between the outer surface of the connecting pipe 21 and the inner diameter of the ring-shaped valve body 24, and air leaks from the gap t.

Further, the ring-shaped valve body 24 is formed of a resin having elasticity such as polypropylene, and when it is press-fitted into the cylindrical connection pipe 21 by a parting part which is a combination of the fixed part and the movable part of the mold. However, there is a problem that a gap is created between the parting portion of the valve body 24 and the outer surface of the cylindrical connecting pipe 21, and air leaks from this gap.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide an electric vacuum cleaner having a small air leak and an air volume adjusting device.

Means for Solving the Problems In order to achieve the above object, the first means of the present invention is to provide a cleaner main body having a built-in electric blower and a dust collector, and one end of a hose connected to the cleaner main body. Has a cylindrical connecting pipe partially formed with an opening, and an open portion rotatably attached to the outer periphery of the connecting pipe to open and close the opening. A C-shaped valve body continuously formed, wherein the valve body has an inner radius smaller than an outer radius of the connecting pipe on a side facing the open portion from a central point thereof, and On the side of the opening from the center point, the inner radius of the connecting pipe is set to be substantially the same as the outer radius of the connecting pipe, and these are continuously formed.

The second means is a main body of a cleaner having a built-in electric blower, a dust collector, etc., a cylindrical connecting pipe attached to one end of a hose connected to the main body of the cleaner, and having a partial opening. The valve includes a C-shaped valve body that is rotatably attached to the outer periphery of the connecting pipe and has an opening portion that opens and closes the opening, and is discontinuous in the circumferential direction by the opening portion. The body has an inner radius smaller than the outer radius of the connecting pipe on the side facing the open portion from the center point, and on the other hand, the inner radius on the side of the opening portion from the center point is the connecting pipe. At least one recessed groove is provided in the radial direction of the connecting pipe at a position close to the opening of the cylindrical connecting pipe, which has substantially the same outer radius as the outer radius of Formed a parting part to be attached, and attached the valve element to the connecting pipe. Parting portion is obtained so as to be positioned in the concave groove portion.

Action In the above-mentioned first means, the inner radius of the valve body on the side facing the opening portion is set to be smaller than the outer radius of the connecting pipe around the substantially center point of the C-shaped valve body, and the opening portion is opened from the substantially center point. By setting the valve body radius on the side to be approximately the same as the outer radius of the connecting pipe,
When the C-shaped valve body is press-fitted into the connecting pipe, air leakage is reduced by eliminating the gap between the outer surface of the connecting pipe and the second means. Provide at least one concave groove in the radial direction of the connecting pipe,
A parting portion is formed on the inner diameter portion of the valve body, which serves as an abutment of the fixed portion and the movable portion of the mold, and when the valve body is attached to the connecting pipe, the parting portion is located in the concave groove portion,
There is no gap between the outer surface of the connecting pipe and the inner surface of the valve body, and air leakage is reduced.

Example Hereinafter, the example will be described with reference to the drawings. Fig. 1 ~
FIG. 4 shows the first embodiment, 1 is a main body of the vacuum cleaner, 2 is a hose connected to the main body 1, 3 is a hose connecting pipe having one end connected to the hose 2, 4 is an extension pipe, One end is connected to the hose connecting pipe 3 and the other end is connected to the floor nozzle 5. Reference numeral 6 is an opening for adjusting the suction force provided in the connecting pipe 3, and 7 is a C-shaped valve body for opening and closing the opening 6, which is rotatably provided on the outer periphery of the connecting pipe 3. The valve body 7 is C-shaped and has an opening 8.

In the C-shaped valve body 7, the inner diameter of curvature d on the side facing the open portion 8 side around the substantially central point of the C-shape is made smaller than the outer radius D of the connecting pipe 3 and opened from the substantially central point. The valve body inner radius d'on the side is approximately the same as the outer radius of the connecting pipe 3, and when the C-shaped valve body 7 is attached to the connecting pipe 3, the C-shaped valve body 7 is expanded by (D-d). By the repulsive force when it is pushed out, it is possible to make close contact with the outer surface of the mounting portion and prevent air leakage from the opening 6.

5 to 6 show the second embodiment of the present invention, and the C-shaped valve body 7 is shown.
The annular parting portions 9 and 9'of the joining portion on the fixed side and the movable side of the mold are formed on the inner peripheral surface of the. Corresponding to the parting portions 9, 9'of the C-shaped valve body 7, concave grooves 10, 10 'are provided in the circumferential direction of the connecting pipe 3 to prevent air leakage from the opening 6. ing.

Next, the adjusting operation of the air volume adjusting device will be described. FIG. 1 shows a state where the suction force is not adjusted, that is, a state where the suction force amount is large. From this state, the ring-shaped valve body 7
When the opening 8 is located at the position of the opening 6 and the opening 6 is opened, air flows through the opened opening 6. Therefore, the amount of air flowing in from the floor nozzle 5 is reduced by this amount, and the suction force is weakened.

EFFECTS OF THE INVENTION As is clear from the above description, the air flow rate adjusting device of the present invention changes the shape (R) on the circumference of the C-shaped valve body and the position close to the opening of the cylindrical connecting pipe. A groove is formed in the connecting pipe in the radial direction so that when the valve body is attached to the connecting pipe, the parting portion is located in the recessed groove to prevent problems with air leakage. This can be prevented and the usability can be improved.

[Brief description of drawings]

1 and 2 are cross-sectional views of an essential part showing an embodiment of the present invention, FIG. 3 is a front view of a C-shaped valve body, FIG. 4 is an overall side view, and FIG.
FIG. 7 is a sectional view showing a main part of another embodiment of the present invention, FIG. 6 is an enlarged sectional view of part A in FIG. 5, and FIG. 7 is a sectional view showing a conventional example. 1 ... mainly vacuum cleaner, 2 ... hose, 3 ... connection pipe, 6 ...
... Opening, 7 ... C-shaped valve body, 8 ... Opening part, 9,9 '...
… Parting part, 10,10 ′ …… Concave groove.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-109635 (JP, A) JP-A-54-51257 (JP, A) Jikkou 38-15323 (JP, Y1)

Claims (2)

[Scope of utility model registration request] 1. A cleaner main body having an electric blower, a dust collector, etc. built-in, a cylindrical connecting pipe connected to a hose connected to the cleaner main body, and having a partial opening, and a connecting pipe of this connecting pipe. And a C-shaped valve body that is rotatably attached to the outer periphery and has an opening portion that opens and closes the opening, and is discontinuous in the circumferential direction by the opening portion. The inner radius is made smaller than the outer radius of the connecting pipe on the side facing the open portion from the center point, while the inner radius is set to the outer radius of the connecting pipe on the opening side from the center point. An air volume adjusting device for an electric vacuum cleaner, which is substantially the same as the above and is formed by continuously forming these. 2. At least one groove is provided in the radial direction of the connecting pipe at a position close to the opening, and a parting portion for attaching a fixed portion and a movable portion of the die is formed in the inner diameter portion of the valve body. The air volume adjusting device for an electric vacuum cleaner according to claim 1, wherein the parting portion is located in the concave groove portion when the valve body is attached to the connecting pipe.