KR20010037742A - Brush for vacuum cleaner - Google Patents

Abstract

PURPOSE: An inlet has a shutter with good durability to secure reliability of operation. CONSTITUTION: An inlet comprises an inlet body(10), a shutter(20), a roller(30), a spring(40) and a stopper(50). The inlet body(10) has a suction hole formed thereunder and an opening formed in the middle of the front surface thereof and communicating with the suction hole. The shutter(20) is rotatably installed to the opening by an axis to open and close. The roller(30) is installed on the axis of the shutter(20) and rotates contacting with and rolling on a ground surface. The spring(40) transmits the rotary force of the roller(30) to the shutter(20) to rotate the shutter(20). The stopper(50) limits the rotating angle of the shutter(20). As the shutter(20) is rotated by the roller(30) rotating by contacting with and rolling on the ground surface, the rotation of the shutter is accurate. The gap between the shutter(20) and the ground surface is large enough to easily suck large dust in.

Description

Suction for vacuum cleaner {Brush for vacuum cleaner}

The present invention relates to a suction port of a vacuum cleaner, and more particularly to a suction port of a vacuum cleaner having a shutter that is opened and closed in front of the suction port forward and backward.

The suction port of a general vacuum cleaner closely adheres to the bottom surface and sucks dust and various dirts from the bottom surface while moving forward and backward. Therefore, the suction port (referring to pull the suction port) is easy, but when moving forward (refers to push the suction port) has a disadvantage that the user's pushing force acts as a load and difficult to move.

On the other hand, the suction port of the vacuum cleaner with a shutter as described above has a good driving performance by opening the shutter when the suction port is pushed and the suction hole at the bottom of the suction port communicates with the outside, and when pulling, the shutter is closed to maintain the suction force with the floor. There is an advantage in that it can inhale dust and various dirt.

A typical example of a vacuum inlet for a vacuum cleaner having a shutter having the above advantages is shown in perspective view in FIG. 1. 2 is a cross-sectional view thereof.

As shown, the suction inlet for a vacuum cleaner with a conventional shutter has a suction hole 2 formed in the bottom of the suction inlet body 1, and the suction hole 2 in the front center portion of the suction inlet body 1. ), An opening 3 is formed, and the shutter 3 is rotatably provided in the opening 3.

The inlet body 1 is assembled to be separated into an upper cover 1a and a lower cover 1b. The suction hole 2 is formed in the lower cover 1b, and the opening 3 is formed in the upper cover 1a. In addition, the shutter 4 is provided to enable the forward and backward swing motion by the hinge protrusions 4a formed at both end portions of the shutter 4 being inserted into the hinge holes of the upper cover 1a. In addition, a pair of protrusions 5 and 5 ′ are extended and formed at predetermined angles on both sides of the front surface of the shutter 4.

In the vacuum cleaner suction port having the conventional shutter as described above, the shutter 4 is initially blocked by the lower end of the opening 3, as shown by the solid line in FIG. When the suction port is pushed in such a state, the shutter 4 rotates counterclockwise in the drawing. As a result, a pair of projections 5 and 5 'of the shutter 4 are in contact with the bottom surface, as indicated by a dashed line in the drawing, so that a predetermined gap is formed between the shutter 4 and the bottom surface. Will be. Therefore, the suction hole 2 is in communication with the outside, whereby the suction force between the suction port and the bottom surface is reduced and the movement of the suction port is easy. In addition, relatively large dirt, such as paper scraps and cookies, present on the bottom surface may be sucked through the gap.

On the other hand, when the suction port is pulled, the shutter 4 rotates clockwise, whereby the lower end of the shutter 4 contacts the bottom surface to close the opening 3. Therefore, a strong suction force is applied between the suction port and the bottom surface to suck in dust and other dirt. At this time, since the upper and both sides of the front surface of the shutter 4 are supported by the upper cover 1a, the shutter 4 does not rotate anymore and maintains a precisely vertical state.

However, in the vacuum cleaner suction port having a conventional shutter as described above, the pair of projections 5 and 5 'provided in the shutter 4 rotates the shutter 4 while in frictional contact with the bottom surface. Therefore, not only the protrusions 5 and 5 'are easily worn but also dust or foreign matter on the protrusions 5 and 5' does not rotate smoothly. As a result, a case in which the shutter 4 does not rotate or the rotation angle is small even when it is rotated and a large dust cannot be sucked, has the problem that the inherent advantages of the suction port cannot be made to the maximum.

The present invention has been made to solve the above problems, and the object of the present invention is to provide a vacuum cleaner suction port that can secure the shutter operation even when the shutter is not only rotated smoothly but also has excellent durability. .

Another object of the present invention is to provide a vacuum cleaner suction port that can effectively suck large dirts because the gap between the shutter and the bottom surface is large when the shutter is opened.

1 is a perspective view showing a suction port for a vacuum cleaner having a conventional shutter.

FIG. 2 is a cross-sectional view illustrating a shutter function of the suction port illustrated in FIG. 1. FIG.

Figure 3 is a perspective view showing a suction port for a vacuum cleaner having a shutter according to an embodiment of the present invention.

Figure 4 is a cross-sectional view taken along the line A-A of Figure 3 showing a shutter structure of the inlet in accordance with an embodiment of the present invention.

5 is a cross-sectional view taken along the line B-B of Figure 4 showing the shutter action of the inlet in accordance with an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10; suction port body 13; suction hole

14; opening 20; shutter

30; roller 40; spring

5; stopper

Inlet for vacuum cleaner according to the present invention for achieving the above object is connected to the extension tube of the vacuum cleaner, the suction hole is formed in the bottom surface and the opening in communication with the suction hole in the front center portion, the opening and closing rotational opening A shutter provided axially, a roller mounted on the shaft of the shutter and rotating in contact with the bottom surface, means for transmitting the rotational force of the roller to the shutter to rotate the shutter, and a rotation angle of the shutter. It is configured to include a limiting stopper.

The rotational force transmitting means is installed between the roller and the one side of the shutter and a coil spring that serves as a friction clutch.

In addition, the shutter is configured to rotate forward and backward at an angle of rotation of 90 °.

According to this, since the shutter rotates forward and reverse by the roller which rotates while contacting the floor surface, the shutter operation can be made accurate and smooth.

In addition, when the shutter is opened, the gap between the shutter and the bottom surface is accurately maintained at a constant size, for example, since the opening is opened while the shutter is rotated in a horizontal state with the bottom surface, cleaning can be performed while making the most of the inherent advantages. Can be.

In addition, since the roller which is the rotational driving source of the shutter rotates while rolling in contact with the bottom surface, it is not easily worn, and thus reliability of operation can be ensured even when used for a long time.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described based on the accompanying drawings.

FIG. 3 is a perspective view illustrating a suction hole for a vacuum cleaner having a shutter according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 showing the structure of a shutter which is a main part of the present invention. 5 is a cross-sectional view taken along line BB of FIG. 4 showing the operation of the shutter.

As shown, the suction inlet for the vacuum cleaner according to an embodiment of the present invention, the suction inlet body 10, the shutter 20 is provided to be rotatable in the suction inlet body 10, and the shutter of the A roller 30 installed on the shaft to rotate, a coil spring 40 as a rotational force transmission means for transmitting the rotational force of the roller 30 to the shutter, and a stopper for limiting the rotational angle of the shutter 20. And 50.

The inlet body 10 has a connecting pipe 11 for connecting with an extension tube (not shown) of the cleaner, and is separated into an upper cover 12a and a lower cover 12b to be coupled to each other. A suction hole 13 is formed in the lower cover 12b, and an opening 14 communicating with the suction hole 13 is formed in the front center portion of the upper cover 12a.

The shutter 20 is rotated in the forward and reverse directions by the shafts 21 and 21 'protruding from both sides thereof being inserted into the hinge holes 14a formed at both sides of the opening 14 of the suction port body 10. It is installed to exercise. As a result, the opening 14 may be selectively opened and closed. The shutter 20 is formed of a material such as rubber, but is not necessarily limited thereto.

The roller 30 is installed on one side shaft 21 of the shutter 20 so as to rotate in contact with the bottom surface.

The coil spring 40 is installed between the roller 30 and the side surface of the shutter 20, and serves to transmit the rotational force of the roller 30 to the shutter 20. That is, the spring 40 has a constant elasticity and is installed between the roller 30 and the side surface of the shutter 20, so that the spring 40 has a constant size due to the elasticity of the spring 40 between the roller 30 and the shutter 20. Since the frictional force acts, the shutter 20 rotates as the roller 30 rotates. At this time, when the load of more than the elasticity of the spring 40 is applied to the shutter 20, the roller 30 is idle. As such, the spring 40 serves as a normal friction clutch, and the means for performing this role is not necessarily limited to the spring 40 of the illustrated example.

On the other hand, the stopper 50 is extended and formed downward from the upper cover 12a, and serves to limit the rotation angle of the shutter 20. As a result, the rotation range of the shutter 20 is limited to a rotation angle of 90 °. For example, initially, it is in a state perpendicular to the bottom surface and finally rotates in a state horizontal to the bottom surface to form a predetermined gap between the shutter 20 and the bottom surface.

In the vacuum cleaner suction port having a shutter according to the present invention as described above, the shutter 20 is initially positioned perpendicular to the bottom surface as shown by the solid line of FIG. (14) is blocked.

When the suction port is pushed in this state, the roller 30 in contact with the bottom surface is rotated counterclockwise in FIG. 5, and the rotational force of the roller 30 is moved to the shutter 20 through the spring 40. By being delivered, the shutter 20 is in a horizontal state with respect to the bottom surface as indicated by the dotted line. As a result, the opening 14 of the suction port body 10 is opened, and thus the suction force between the suction port and the bottom surface is reduced, and thus the suction port is easily moved. At this time, dirt, such as large dust or confectionery, present on the bottom surface is sucked through the opening 14 of the suction port which is moved while the opening 14 is opened as described above. Here, the shutter 20 is maintained by the stopper 50, the movement position, and the shutter 20 maintains the state unless the suction port is reversed again. Then, the roller 30 continues to idle while rolling contact with the bottom surface.

On the other hand, when the suction port is pulled, the roller 30 is rotated in the opposite direction, whereby the shutter 20 is returned to the initial state as indicated by the dotted line in FIG. As a result, the opening 14 of the suction port main body 10 is again blocked by the shutter 20, so that a strong suction force acts between the suction port and the bottom surface, and dust or dirt is sucked in. Even in this case, the position of the shutter 20 is maintained by the stopper 50, and the shutter 20 maintains its initial state unless the suction port is advanced again. Then, the roller 30 continues to idle while rolling contact with the bottom surface.

The action of the suction port according to the present invention is the same as in the prior art. However, in the related art, the shutter is not smoothly operated by rotating the shutter by using the protrusion that is in frictional contact with the bottom surface. However, in the present invention, the shutter 20 is rotated by using the roller 30 which rotates while being in contact with the bottom surface. Therefore, the shutter operation is always accurate and smooth.

In addition, since the conventional protrusions are in frictional contact with the bottom surface, there is a problem of abrasion of the protrusions. However, since the roller of the present invention makes rolling contact with the bottom surface, there is little wear.

According to the present invention as described above, since the shutter is rotated forward and backward by the roller rotating while rolling contact with the bottom surface, the shutter does not rotate, or the rotation angle thereof is not reduced. That is, there is an advantage that the accuracy and smoothness of the shutter operation can be achieved.

In addition, when the shutter is opened, the gap between the shutter and the bottom surface is accurately maintained at a constant size, for example, since the opening is opened while the shutter is rotated in a horizontal state with the bottom surface, cleaning can be performed while making the most of the inherent advantages. Can be.

In addition, since the roller which is the rotational driving source of the shutter rotates while rolling in contact with the bottom surface, it is not easily worn, and thus reliability of operation can be ensured even when used for a long time.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described embodiments, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the following claims. Various modifications can be made by those skilled in the art, and such modifications are within the scope of the claims.

Claims (3)

A suction port body connected to the extension pipe of the cleaner, and having a suction hole formed at a bottom thereof, and an opening communicating with the suction hole at a front center part thereof; A shutter provided in the opening so as to be rotatable and rotatable in the opening; A roller which is installed on the shaft of the shutter and rotates in contact with the bottom surface by rolling; Means for transmitting the rotational force of the roller to the shutter to cause the shutter to rotate; And Inlet for vacuum cleaner comprising a; stopper for limiting the rotation angle of the shutter. The method of claim 1, wherein the rotational force transmitting means is composed of a coil spring installed between the roller and one side of the shutter and acts as a friction clutch, whereby the roller is applied to the shutter when a load greater than or equal to the elasticity of the spring is applied. The inlet for the vacuum cleaner, characterized in that the idle. The vacuum inlet of claim 1 or 2, wherein the shutter is configured to rotate forward and backward at a rotation angle of 90 °.