KR20040100146A - Brush height control apparatus of vacuum cleaner - Google Patents

Abstract

PURPOSE: A brush height control apparatus for a vacuum cleaner is provided to prevent a floor from being damaged by a rotary brush by selectively controlling the height of the rotary brush without the change of suction force. CONSTITUTION: A brush height control apparatus for a vacuum cleaner is composed of a shaft support body(106) for supporting a rotary shaft(105a) of a rotary brush(105) rotatably installed in a suction head(101), a position varying unit(107) moving the shaft support body up and down to vary the vertical position of the rotary brush, and a position fixing unit(108) fixing the vertical position of the shaft support body. The position varying unit includes a large hole(121) formed at the side wall of a suction nozzle, and a spring(122) installed at the lower part of the shaft support body and elastically supporting the shaft support body upward. The shaft support body slides vertically in the large hole. The position fixing unit includes fixing groove(131) formed at both sides of the large hole, a pair of fixing units(132) installed at both sides of the shaft support body and retractably inserted into the fixing grooves, and a driving unit(133) driving the fixing units.

Description

Rotation brush height adjusting device of vacuum cleaner {BRUSH HEIGHT CONTROL APPARATUS OF VACUUM CLEANER}

The present invention relates to a vacuum cleaner, and more particularly, to protect the floor by cleaning the floor with the height adjusted so that the rotating brush does not touch the floor while the height of the suction head is maintained as it is. It relates to a rotating brush height adjusting device of a vacuum cleaner.

In general, a vacuum cleaner includes a casing in which a discharge port is formed, a fan motor accommodated to generate a suction force in the casing, and a suction head coupled to the lower part of the casing so as to be in contact with each other to suck foreign substances in the floor together with a fluid. Equipped.

In addition, the suction head of the vacuum cleaner as described above is provided with a height adjusting device for preventing the floor from being scratched by a rotary brush installed on the suction head by lifting the suction head to a certain height when cleaning the floor.

1 is a cross-sectional view showing a state in which the height adjustment device as described above is installed on the suction head of the upright vacuum cleaner.

As shown in the drawing, the height adjusting device of a conventional vacuum cleaner is provided with a first link (2) so that one end is fixed to a predetermined portion inside the case (1) of the suction head (10), and the first link (2). One end of the second link (3) is connected to the other end of the), and the bottom support wheel (4) is provided on the side of the second link (3), and in the vertical direction tubular guide pipe ( 5) Up and down moving rods 6 are installed to be lifted up and down in the up and down direction, and the up and down movements of the up and down moving rods 6 are adjusted. Height adjustment switch (7) is coupled to.

The height adjustment switch 7 is an outer switch 11 installed to be slid by an external force in a state exposed to the outside in the sliding groove 8 formed to be inclined at an angle to the outside of the case 1 of the suction head 10. And, it is integrally connected to the outer switch portion 11 is installed so as to be located inside the case (1) and the round portion (6a) formed on the upper surface of the upper and lower movable rods (6) on the lower surface is sliding and seated It is composed of the inner switch portion 12 is formed with three seating grooves (12a, 12a ', 12a ") to be adjusted.

In the figure, reference numeral 13 denotes a rotary brush, and 14 denotes a suction port.

It describes the operation of adjusting the height when cleaning using a vacuum cleaner equipped with a conventional height adjusting device configured as described above.

First, when cleaning the carpet with a vacuum cleaner, the user pushes up the height adjustment switch (7) to the upper side, in this way push the height adjustment switch (7) up and down in the bottom mounting groove (12a ") (6) ascends and is seated, and as the upper and lower movable rods 6 are raised, the bottom support wheel 4 is bent by the second link 3 and moved upwards at the same time, resulting in suction. The overall height of the head 10 is lowered, the rotary brush 13 is in contact with the floor, and when the vacuum cleaner is operated in this state, the suction force is generated through the suction port 14 and the rotary brush 13 is As it rotates, it sweeps away dust and dirt from the carpet.

When cleaning the floor, the upper and lower movable rods 6 are seated in the top seating grooves 12 formed inside the height adjustment switch 7 by pushing the height adjustment switch 7 downward. As such, the upper and lower movable rods 6 are seated in the top seating grooves 12 so that the bottom support wheels 4 installed on the bottom side are moved to the lower side and sucked on the bottom surface. The head 10 is in a relatively raised state. Therefore, the rotary brush 13 installed inside the suction head 10 is not in contact with the floor, and when the vacuum cleaner is operated in such a state, the rotary brush 13 is not in contact with the floor. Inhalation of dust or foreign substances on the floor is made by the suction force generated through 14).

However, the conventional vacuum cleaner constructed as described above has a lower surface of the suction head when the suction head is lifted to a certain height by using a height adjusting device to prevent scratching of the floor from the rotating brush when the floor is cleaned. As the distance between the floor and the floor is too large, the suction power is lowered and the cleaning ability is lowered.

The object of the present invention devised in view of the above problems is to allow a selective adjustment of the height of the rotating brush to vacuum to prevent damage to the floor by the rotary brush in the suction force does not decrease during cleaning It is to provide a rotating brush height adjusting device of the cleaner.

1 is a longitudinal sectional view of a state in which a height adjusting device is installed in a suction head of a conventional vacuum cleaner.

Figure 2 is a perspective view of a vacuum cleaner equipped with a rotating brush height adjustment device of the present invention.

Figure 3 is an exploded perspective view of the rotating brush height adjusting device according to the present invention.

4 is a cross-sectional view of the assembled state of FIG.

Figure 5 is a side cross-sectional view of the assembled state of Figure 3;

6 is a perspective view of the shaft support;

7 is a perspective view of the latch.

8 is a perspective view of a cam disc.

Figure 9 is a state showing the height adjustment state when cleaning the carpet in the present invention.

10 is a state diagram of a state in which the latching state of the latch is disassembled in the present invention.

Figure 11 is a state showing the height adjustment state when cleaning the floor in the present invention.

12 is a cross-sectional view showing a modification of the present invention.

Explanation of symbols on the main parts of the drawings

101: suction head 103: rotating brush

105: rotating brush 105a: shaft

106: shaft support 107: vertical position of the shaft support

108: shaft support position fixing means 109: side wall

121: long hole 122: leaf spring

131: locking groove 132: latch

132a: round part 133: latch driving mechanism

141: sliding hole 142: spring

143: cam pin 144: cam groove

145: cam disc 151: handle

In order to achieve the object of the present invention as described above

A shaft support for supporting the shaft of the rotary brush rotatably installed inside the nozzle portion of the vacuum cleaner suction head, and an upper and lower position of the shaft support for changing the up and down positions of the rotary brush by moving the shaft support up and down; It is provided with a rotation brush height adjusting device of the vacuum cleaner, characterized in that it comprises a shaft support position fixing means for fixing the position so that the shaft support is fixed to a predetermined position in the up, down direction.

Preferably, the shaft support vertical vertical position is formed on the side wall of the nozzle portion to form a long hole so that the shaft support is slidable in the up and down direction, and a spring for elastically supporting the shaft support upward in the lower portion of the shaft support. .

The shaft support position fixing means forms a locking groove on both sides of the long hole of the side wall, and installs a pair of latches on both sides of the shaft support so as to be protruded outwardly so that the locking groove can enter and exit the latch. It is effective to install a brace drive mechanism for driving to lose weight.

The latch driving mechanism includes sliding holes formed at both sides of the shaft support to guide the latch to slide inward and outward, springs for elastically supporting the latch in the outward direction, and a cam pin formed to protrude outward of the latch. It is preferable that the cam groove to be inserted is composed of a cam disc formed on the inner side.

Hereinafter, with reference to the embodiment of the accompanying drawings, the height of the rotating brush of the vacuum cleaner of the present invention constituted as described above in more detail as follows.

Figure 2 is a perspective view of a vacuum cleaner installed with a rotating brush height adjustment device of the present invention, Figure 3 is an exploded perspective view of the rotating brush height adjustment device according to the invention, Figure 4 is a cross-sectional view of the assembled state of Figure 3, Figure 5 is a side cross-sectional view of the assembled state of FIG. 3, FIG. 6 is a perspective view of the shaft support, FIG. 7 is a perspective view of the latch, and FIG. 8 is a perspective view of the cam disc.

As shown in the drawing, the vacuum cleaner is provided with a suction head 101 for suctioning dust or foreign substances under the main body 100, and the suction head 101 has a rotary brush for cleaning carpets or floors. Rotating brush height adjusting device 102 for adjusting the height of the 105 is provided.

The rotary brush height adjusting device 102 of the vacuum cleaner is rotatable to the end of the shaft 105a of the rotary brush 105 on both sides of the rotary brush 105 installed inside the nozzle unit 103 of the suction head 101. The shaft support 106 and the shaft support 106 for moving the shaft support 106 up and down to change the up and down positions of the rotary brush 105 to be coupled, the variable stage 107, and the shaft The support body 106 is comprised of the shaft support position fixing means 108 which fixes a position so that it may be fixed to a predetermined position of an up-down direction.

The shaft support 106 is formed in the shape of a quadrilateral plate having a predetermined thickness and area, the central portion is formed with a through hole (106a) that can be rotated by inserting the shaft (105a), one side of the circular shape formed to be negative An embossed portion 113 is formed in which the sound portion 112 and the outside of the circular sound portion 112 protrude relatively than the circular sound portion 112.

The shaft support vertical position variable stage 107 is formed on the side wall 109 of the nozzle portion 103 to form a long hole 121 so that the shaft support 106 is slidable in the vertical direction, the shaft support 106 The bottom of the) is formed by installing a leaf spring 122 for supporting the shaft support 106 in the upward direction.

The shaft support position fixing means 108 forms a locking groove 131 recessed to a predetermined depth on both sides of the long hole 121 formed in the side wall 109, and the shaft to be entered into the locking groove 131 A pair of clasps 132 are provided on both sides of the support body 106 so as to be projected outwardly, and a clasp drive mechanism 133 for driving the clasps 132 is provided.

The latch 132 is a rectangular rod shape having a predetermined length, and a round part 132a is formed at the lower side of the front end so that the latch 132 can be easily entered into and out of the locking groove 131.

The latch driving mechanism 133 is formed to penetrate the embossed portion 113 on both sides of the shaft support 106, the sliding hole 141 for guiding the latch 132 to slide inward and outward, and the latch Cam grooves 144 into which a pair of springs 142 disposed in the horizontal direction so as to elastically support the 132 in the outward direction, and each of the cam pins 143 protruding from the outside of the latch 132 are inserted and coupled thereto. ) Is made up of a cam disc 145 which is formed in the diagonal direction on the inner side surface 145a.

One end of the cam groove 144 is formed close to the center, and the other end is formed far from the center, the latch 132 by the forward and reverse rotation in the state in which the cam pin 142 of the latch 132 is coupled ) Can be moved inward and outward.

The cam disc 145 is a disc body having a predetermined thickness and area, and a straight handle 151 is protruded from the outer side surface 145b of the body portion, and a protruding engagement protruding radially along the circumferential direction on the outer circumferential surface thereof. The portion 161 is formed so that the engaged state is not disassembled by being supported by the inner circumferential groove 162 formed on the outer side of the side wall 109.

In the drawing, reference numeral 171 denotes a suction port.

The height adjustment operation of the rotating brush height adjusting device of the vacuum cleaner of the present invention configured as described above and the effects thereof will be described.

9 is a state in which the shaft support 106 is located at the lowest position in the long hole 121 of the side wall 109, and in such a state, the latch 132 protrudes outward and is inserted into the locking groove 131, thereby providing a plate. The shaft support 106 is suppressed from moving upward by the spring force of the spring 122, and the rotary brush 105 having the shaft 105a coupled to the shaft support 106 moves downward. As it is in contact with the floor, it rotates in such a state and sweeps out the dust or foreign substances stuck on the carpet.

When the user cleans the floor in the above state, by holding the handle 151 of the cam disc 145 installed on both sides and rotating it counterclockwise as indicated by the arrow in FIG. 10, the cam disc 145 Cam pin 142 is inserted into the cam groove 144 of the) is sliding along the cam groove 144 and moves toward the center, whereby the latch 132 is slid inwardly and is moved out of the locking groove 131. .

As described above, when the latch 132 is removed from the locking groove 131, the shaft support 106 is moved along the long hole 121 by the spring force of the leaf spring 122 supported by the lower portion of the shaft support 106. 11, the upper side is moved upwards, and in such a state, the rotary brush 105 coupled to the shaft support 106 is also moved upwards with the shaft support 106, so it is separated from the bottom, so the rotary brush ( 105 is rotated without being in contact with the floor, and suction or dust is carried out without deterioration of suction force while the suction port 171 is maintained close to the floor.

When moving the height of the rotary brush 105 to the lower side again for cleaning the carpet in the above state, grab the handle 151 of the cam disc 145 and apply a force to the lower side to win the force of the leaf spring 122 and the shaft The cam disc in the state in which the support 106 and the rotary brush 105 are moved downward so that the rotary brush 105 is in contact with the floor, and the shaft support 106 is moved downward of the long hole 121. By rotating the clock 145 in the clockwise direction so that the latch 132 is protruded and inserted into the locking groove 131 to maintain the rotation brush 105 in contact with the floor.

12 is a cross-sectional view showing a modified example of the present invention. As shown in the drawing, the basic structure is the same as the above-described embodiment, and the same reference numerals are assigned to the same parts. Here, the modified example is an example in which two compression coil springs 181 are used as springs for supporting the shaft support 106, and the shaft support 106 is elastically upward by the compression coil spring 181 of this type. To be supported.

That is, although the leaf spring 122 or the compression coil spring 181 is described as an example for supporting the shaft support 106 as described above, the present invention is not limited thereto, and the shaft support 106 is elastically upward. As long as it can support, it is natural that any number of implementation and application can be made without departing from the spirit and scope of the present invention.

As described in detail above, the rotary brush height adjusting device of the vacuum cleaner of the present invention supports both ends of the rotary brush with the shaft support, and allows the shaft support to be changed in the up and down directions, and the position thereof is The variable shaft support is fixed to a predetermined position, and when the carpet is cleaned using a cleaner, the rotary brush is moved downward to wipe out foreign substances stuck on the carpet, and the rotary brush is moved upward when cleaning the floor. By removing the dust by the suction force through the suction port while the floor is not in contact with the floor, the brush is prevented from being damaged by the brush bristles when cleaning the floor, and the suction port is in close proximity to the floor. As it is made, it maintains strong suction power and improves cleaning performance. The.

Claims (8)

A shaft support for supporting the shaft of the rotary brush rotatably installed inside the nozzle portion of the vacuum cleaner suction head, and an upper and lower position of the shaft support for changing the up and down positions of the rotary brush by moving the shaft support up and down; And a shaft support position fixing means for fixing the position so that the shaft support is fixed at a predetermined position in the up and down directions. The method of claim 1, The upper and lower position variable stage of the shaft support is configured to form a long hole on the side wall of the nozzle to be slidable in the vertical direction, and to install a spring to support the shaft support in the upper direction in the lower portion of the shaft support Rotating brush height adjusting device for a vacuum cleaner. The method of claim 1, The spring is a rotating brush height adjusting device of the vacuum cleaner, characterized in that the leaf spring. The method of claim 1, Rotating brush height adjusting device of the vacuum cleaner, characterized in that the spring is a compression coil spring. The method of claim 1, The shaft support position fixing means forms a locking groove on both sides of the long hole of the side wall, and installs a pair of latches on both sides of the shaft support so as to be protruded outwardly so that the locking groove can enter and exit the latch. Rotating brush height adjusting device of the vacuum cleaner, characterized in that the installation is provided by the clamp driving mechanism for driving. The method of claim 5, The latch is a rectangular bar shape having a predetermined length, the lower side of the front end of the rotary brush height adjusting device of the vacuum cleaner, characterized in that the round portion is formed to facilitate entry and exit into the locking groove. The method of claim 5, The latch driving mechanism includes sliding holes formed at both sides of the shaft support to guide the latch to slide inward and outward, springs for elastically supporting the latch in the outward direction, and a cam pin formed to protrude outward of the latch. Rotating brush height adjusting device of the vacuum cleaner, characterized in that the cam groove is inserted into the cam groove is formed on the inner surface. The method of claim 7, wherein Rotating brush height adjusting device of the vacuum cleaner, characterized in that the handle for gripping protruding from the outer side of the cam disc.