KR200402888Y1 - Auto leg of washing machine - Google Patents

Abstract

The present invention relates to an automatic height adjustment leg of a washing machine, the boss portion penetrating the base of the washing machine downwardly protruding downward, the fixing nut fastened to the boss portion penetrating the base, and movable inside the cylinder And a piston having an elastic member disposed between the cylinder, a leg fixed to the piston through the boss, and an anti-loosening mechanism hooked to the base to surround the outer surface of the fixing nut. The piston and the leg is elevated according to the height of the manual height adjustment leg installed on the other edge of the base is automatically adjusted the height and horizontality of the drum washing machine, the fixing nut is fixed by the loosening prevention mechanism There is an advantage that the arbitrarily adjusted or loosened by the consumer or an unskilled mechanic is prevented. .

Description

Auto leg of washing machine {Auto leg of washing machine}

The present invention relates to a leg that supports the washing machine and adjusts the height of the washing machine, and more particularly, to an automatic height adjusting leg of the washing machine in which the height of the washing machine is automatically adjusted.

In general, a washing machine is a device for washing laundry through a process such as washing, rinsing, dehydrating, and drying to remove contamination from clothes, bedding, etc. (hereinafter, referred to as 'laundry').

1 is a perspective view showing a conventional drum washing machine.

In the conventional drum washing machine, as illustrated in FIG. 1, a tub (not shown) in which washing water is accommodated is installed inside the cabinet 2 so as to be buffered, and a drum 4 into which laundry is introduced into the tub is provided. It is rotatably installed.

A cabinet cover 8 having a laundry entrance 6 through which laundry is introduced or drawn out inside the drum 4 is mounted on the front surface of the cabinet 2, and the laundry entrance 6 is mounted on the cabinet cover 8. The door 10 for opening and closing the door is rotatably installed.

A top plate 12 and a base 14 are mounted on upper and lower surfaces of the cabinet 2, and the drum washing machine 1 is supported at four corners of the base 14. Height adjusting leg 20 for adjusting the height of 1) is installed.

The height adjustment leg 20 is fixed to the lower end of the bolt portion 22 and the bolt portion 22 to the base 14, the base is in close contact with the bottom surface on which the drum washing machine 1 is installed It consists of a part 24, the height adjustment part 26 of the hexagon nut shape is integrally formed in any one of the said bolt part 22 and the support part 24.

On the other hand, the height adjustment process of the drum washing machine 1 according to the prior art is to rotate the height adjustment unit 26 clockwise or counterclockwise after coupling the tool such as a spanner to the height adjustment unit 26.

When the height adjuster 26 is rotated as described above, the bolt part 22 and the support part 24 are rotated together, so that the bolt part 22 is inserted into or removed from the base 14. do.

Therefore, as the height of the height adjustment leg 20 installed in the base 14 is lowered or increased, the height of the drum washing machine 1 is adjusted.

However, since the height adjustment leg of the drum washing machine according to the prior art is manually adjusted in height, workability is decreased when the height of the drum washing machine 1 is adjusted, and a separate height adjusting tool is used, such as the spanner. There is a problem.

In addition, when the drum washing machine 1 is installed, the height of the four height adjusting legs 20 installed in the base 14 is adjusted to adjust the level of the drum washing machine 1, respectively. Since the operation of adjusting the level of the very uncomfortable, there is a problem that the installation time of the drum washing machine 1 is also increased.

The present invention is devised to solve the above problems, the object of the present invention is to automatically adjust the height and horizontality of the drum washing machine, to provide an automatic height adjustment leg of the washing machine can be prevented from randomly loosening the parts. It is.

The automatic height adjustment leg of the washing machine according to the present invention for realizing the above object is a cylinder with a boss portion penetrating downwards through the base of the washing machine, a fixing nut fastened to the boss portion penetrating the base, and the cylinder A piston which is movably disposed within the cylinder and having an elastic member between the cylinder, a leg fixed to the piston through the boss, and hooked to the base to surround the outer surface of the fixing nut. Characterized in that it comprises a loosening prevention mechanism.

One side corner of the base is formed with a through hole through which the boss of the cylinder penetrates, and the other side has a hook hole through which the release preventing mechanism is hooked.

Unlike the above, the base of the base is equipped with a metal base bracket, a through hole through which the boss portion of the cylinder is formed on one side of the base bracket, the other side of the hook hole hook coupling mechanism Is formed.

The anti-loosening mechanism includes a tubular portion formed to surround an outer circumferential surface of the fixing nut so that fastening and disassembly of the fixing nut are not possible, and a hook portion protruding upward from the tubular portion and hooked to the hook hole.

Here, the tubular portion is formed with an inner diameter the same size as the maximum outer diameter of the fixing nut, the outer diameter is formed larger than the outer diameter of the lower cylinder.

The fixing nut is a polygonal nut having a plurality of corners and a flat portion arranged in a polygonal shape around the outer circumferential surface, and a plurality of the fixing nut is inserted into the inner circumferential surface of the tubular portion so that the corners of the fixing nut can be inserted in the vertical direction and hung in the circumferential direction A locking jaw is formed.

In addition, at one side of the hook hole, an evacuation hole for changing the position of the locking jaw is formed long in the circumferential direction so that interference of the locking jaw and the corner part is avoided when the release preventing mechanism is installed.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

2 is a perspective view showing a drum washing machine according to an embodiment of the present invention.

The drum washing machine according to an embodiment of the present invention, as shown in Figure 2, the cabinet 51 to form an appearance, a tub (not shown) installed to be buffered by a spring and a damper inside the cabinet 51 ), A drum (52) rotatably disposed inside the tub and formed with a plurality of manual holes (52A), and installed on an inner surface of the drum (52) so that laundry is rotated by gravity when the drum (52) rotates. It includes a plurality of lifters 53 for lifting the laundry so as to fall by a fall, and a motor (not shown) mounted on the rear of the tub to rotate the drum (52).

Here, a cabinet cover 55 having a laundry entrance 54 formed at a center thereof is mounted on a front surface of the cabinet 51, and a door 56 that opens and closes the laundry entrance 54 is rotated at the cabinet cover 55. It is possibly installed.

On the upper side of the cabinet cover 55, a control panel 57 for displaying the operation state of the drum washing machine 50 and for operating the drum washing machine 50 is installed.

The top plate 58 is mounted on the upper surface of the cabinet 51, and the base 59 is mounted on the lower surface of the cabinet 51.

Four corners of the base 59 support the load of the drum washing machine 50 and a height adjustment leg for adjusting the height of the drum washing machine 50 is installed.

On the other hand, the height adjustment leg of the base of the manual height adjustment leg 60 and at least two of the four corners of the base 59 and the manual height adjustment leg 60 is not installed It consists of an automatic height adjustment leg 70 is installed at the corner.

The manual height adjustment leg 60 is fixed to the bolt portion 62 is screwed to the base 59, the lower end of the bolt portion 62 is in close contact with the bottom surface on which the drum washing machine 50 is installed It consists of the supporting part 64.

The height adjustment portion 66 having a hexagon nut shape is integrated in any one of the bolt portion 62 and the support portion 64 so that the height can be manually adjusted by a tool such as a spanner. Is formed.

The automatic height adjustment leg 70 is automatically adjusted in height according to the height of the manual height adjustment leg 60 so that the drum washing machine 50 can be horizontally installed.

In particular, the manual height adjustment leg 60 and the automatic height adjustment leg 70 is installed directly on the corner of the base 59, or installed on the base bracket 68 separately mounted on the corner of the base 59 May be

Hereinafter, in the present embodiment, the manual height adjustment leg 60 and the automatic height adjustment leg 70 will be described as being limited to being installed in the base bracket 68.

The base bracket 68 is formed of a metal material so that the manual height adjustment leg 60 and the automatic height adjustment leg 70 can be firmly installed.

3 and 4 are a perspective view and a cross-sectional view showing an automatic height adjustment leg of the drum washing machine according to an embodiment of the present invention, Figure 5 is a cross-sectional view taken along the line AA of Figure 4, Figure 6 5 is a cross-sectional view taken along the line BB, Figure 7 is a perspective view showing a state in which the loosening prevention mechanism of the automatic height adjustment leg according to an embodiment of the present invention, Figure 8 is an embodiment of the present invention The loosening prevention mechanism of the automatic height adjustment leg according to the example is a perspective view shown.

Automatic height adjustment leg of the drum washing machine according to an embodiment of the present invention, as shown in Figure 3 to 8, is mounted perpendicular to the upper surface of the base bracket 68 and the boss passing through the base bracket 68 A cylinder 72 in which the portion 86 protrudes downward from the lower end portion, a fixing nut 74 fastened and fixed to the outer circumferential surface of the boss portion 86 so that the cylinder 72 is fixed to the base bracket 68, and A cylinder cap 76 mounted in a screwed structure at an open upper end of the cylinder 72, a piston 78 movably disposed in the cylinder 72, and the piston 78 elastically An elastic member 80 disposed between the piston 78 and the cylinder cap 76 to be supported, and a friction member 82 mounted on an outer surface of the piston 78 to be in frictional contact with the cylinder 72; Is disposed so that the upper end is movable in the boss portion 86 of the cylinder (72) In addition, the above is configured to include a leg (84) upper end is fixed to the piston (78).

The cylinder 72 is a cylindrical injection molded in the vertical direction, the upper surface is opened so that the piston 78 and the elastic member 80 can be inserted therein, and is mounted on the upper surface of the base bracket 68 In addition, the boss portion 86 protrudes downwardly in communication with the inside of the lower surface of the leg 84 so that the upper end portion of the leg 84 is inserted therethrough.

The base bracket 68 has a through hole 69 through which the boss portion 86 penetrates, and a male screw is formed on the outer circumferential surface of the boss portion 86 so that the fixing nut 74 is fastened.

The piston 78 is a cylindrical injection-molded product to be moved up and down along the inside of the cylinder 72, the mounting groove 78A is formed on the outer circumferential surface of the outer peripheral surface so that the friction member 82 is mounted and fixed, A fastening groove (not shown) having a female thread is formed at the center of the lower surface of the leg 84 so that the upper end of the leg 84 is fixed by a screw fastening structure.

The leg 84 is inserted through the boss portion 86 and is fastened to the lower end of the bolt portion 84A and the lower end of the bolt portion 84A. It consists of a support portion 84B in close contact with the bottom surface on which the washing machine 50 is installed.

The bolt portion 84A has a male screw formed on an outer circumferential surface of the upper end portion so as to be connected to the fastening groove of the piston 78 by a screwing structure, and other than the upper end portion so as to be movable in the vertical direction in the boss portion 86. No male thread is formed on the outer circumferential surface.

Particularly, in order to prevent the piston 78 from rotating together with the bolt portion 84A in the process of fastening the bolt portion 84A to the fastening groove, the rotation preventing portion 90 is provided on the piston 78 and the cylinder 72. Is formed.

The anti-rotation part 90 includes a first locking protrusion 92 protruding downward from the lower surface of the piston 78 and a bottom surface inside the cylinder 72 so that the first locking protrusion 92 is hung in the circumferential direction. It consists of a second locking projection (94) protruding upward.

The first locking protrusions 92 are formed on the lower surface of the piston 78 so as to be spaced apart from each other in the circumferential direction with respect to the fastening groove, and the second locking protrusions 94 are the bottom surface inside the cylinder 72. A plurality of radially formed on the boss portion 86 to correspond to the first locking projection 92.

Accordingly, since the first locking protrusion 92 of the piston 78 is engaged with the second locking protrusion 94 of the cylinder 72, the bolt portion 84A of the leg 84 is connected to the piston 78. The piston 78 is not rotated together with the bolt portion 84A when fastened to the fastening groove of the leg 84 and the piston 78 is easily assembled.

The friction member 82 is a member that prevents a sudden relative movement of the cylinder 72 and the piston 78 to attenuate the vibration transmitted to the automatic height adjustment leg 70, the mounting groove of the piston 78 It is mounted to 78A and is formed in a cylindrical shape so that the contact area with the cylinder 72 is increased.

The friction member 82 as described above is formed of any one material of the felt (Felt) and sponge (sponge).

The elastic member 80 is a coil spring 80 that the piston 78 elastically supports, the lower end is disposed on the upper surface of the piston 78, the upper end is disposed on the bottom surface of the cylinder cap 76 do.

On the bottom surface of the cylinder cap 76 and the upper surface of the piston 78, the upper insertion portion 112A is inserted into the hollow inside of the coil spring so that the upper end and the lower end of the coil spring 80 are stably supported. The lower insertion portion 78B is formed to protrude to a certain height.

Therefore, when the load of the drum washing machine 50 is not transmitted to the automatic height adjustment leg 70, the piston 78 is in close contact with the bottom surface of the cylinder 72 by the elastic member 80, and thus the first locking protrusion is provided. 92 and the second locking projection 94 are in a locked state.

The fixing nut 74 is a polygonal nut having a plurality of flat parts and corners arranged in a polygonal shape around the outer circumferential surface thereof. The fixing nut 74 is fastened to the outer circumferential surface of the boss portion 86 so that the cylinder 72 is attached to the base bracket 68. It is fixed.

That is, as the fixing nut 74 is fastened to the boss portion 86, the lower surface of the cylinder 72 and the upper surface of the fixing nut 74 are pressed onto the upper and lower surfaces of the base bracket 68 and the cylinder. 72 is fixed to the base 59.

On the other hand, when the fixing nut 74 is arbitrarily manipulated by a consumer or an inexperienced mechanic, the automatic height adjustment leg 70 may flow due to vibration and shock of the drum washing machine 50, and so on. Leg 70 is broken or the drum washing machine 50 falls.

Therefore, the release preventing mechanism 100 is mounted on the outside of the fixing nut 74 so that any loosening of the fixing nut 74 is prevented.

The anti-loosening mechanism 100 is an injection molded product formed in a tubular shape, a tubular part 102 formed to surround the outer circumferential surface of the fixing nut 74 fastened to the boss part 86, and upwardly from the tubular part 102. Protruding hook portion 104 is hooked to the hook hole 106 of the base bracket 68.

Here, the tubular portion 102 is formed with an inner diameter (D2) larger than the maximum outer diameter (D1) of the fixing nut 74 so that the fixing nut 74 can be disposed therein, the tubular portion (102) Inner diameter (D2) is preferably formed equal to the maximum outer diameter (D1) of the fixing nut (74).

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In addition, the hook portion 104 is inserted into the hook hole 106 so that the tubular portion 102 disposed outside the outer circumferential surface of the fixing nut 74 does not flow downward to the upper surface of the base bracket 68. It is a fastening member that is locked.

The hook portion 104 is formed in a plurality of spaced apart in the circumferential direction of the tubular portion 102, the hook hole 106 is formed in the base bracket 68 to correspond to the hook portion 104 do.

In particular, the hook portion 104 protrudes upward from the outer circumferential surface of the tubular portion 102 and the hook portion 104 does not interfere with the lower portion of the cylinder 72 installed on the upper surface of the base bracket 68. The outer diameter of the tubular portion 102 is formed larger than the outer diameter of the cylinder 72.

That is, when the outer diameter of the tubular portion 102 is larger than the cylinder 72, the hook portion 104 protruding upward from the outer circumferential surface of the tubular portion 102 is disposed outside the cylinder 72 to the cylinder Interference between the 72 and the hook portion 104 is prevented.

The cylinder cap 76 is a cylindrical injection molded product having a lower surface to be covered with an upper end of the cylinder 72, and a fastening part 110 mounted on the outer circumferential surface of the upper end of the cylinder 72 in a screwing structure, and The upper end of the elastic member 80 is composed of a support portion 112 is supported.

An internal thread is formed on the inner circumferential surface of the fastening part 110 so as to be fastened to an external thread formed on the outer circumferential surface of the upper end of the cylinder 72, and a plurality of anti-slip jaws 110A are formed on the outer circumferential surface so that the cylinder cap 76 is easily fastened. do.

The upper insertion part 112A protrudes downward from the bottom of the support part 112 such that the upper end of the elastic member 80 is stably supported.

On the other hand, a locking projection 120 is formed in the cylinder cap 76 and the cylinder 72 to prevent the cylinder cap 76 from being released from the cylinder 72 arbitrarily.

The locking protrusion 120 includes the first protrusion 122 protruding downward from the lower end of the cylinder cap 76 and the cylinder so that the first protrusion 122 is locked when the cylinder cap 76 is completely installed. It consists of the 2nd protrusion part 124 which protrudes upward on the outer periphery of the upper end part of 72.

Here, the first protrusion 122 protrudes downward from the bottom of the fastening part 110 of the cylinder cap 76, and a plurality of protrusions 126 are continuously horizontally disposed along the bottom of the fastening part 110. It is formed in a horizontal serrated structure.

In addition, the second protrusion 124 protrudes upward on an upper surface of the stopper 129 protruding outward from an outer circumferential surface of the upper end of the cylinder 72, and a plurality of protrusions 128 are formed along the upper surface of the stopper 129. It is formed in a horizontal serrated structure arranged continuously horizontally.

The protrusions 126 and 128 of the first protrusion 122 and the second protrusion 124 are triangular protrusions formed in a triangular cross-sectional shape, and the first protrusion 122 and the second protrusion 124 are the same. When the fastening of the cylinder cap 76 is completed, all of the plurality of protrusions 126 and 128 are engaged.

Therefore, any loosening of the cylinder cap 76 is prevented by the locking force between the first protrusion 122 and the second protrusion 124, and the first protrusion 122 is formed on the upper surface of the second protrusion 124. Overlocking of the cylinder cap 76 is also prevented.

In addition, at least one of the first protrusion 122 and the second protrusion 124 is formed in plural in the circumferential direction.

That is, a plurality of first protrusions 122 are formed at the lower end of the fastening portion 110 of the cylinder cap 76 in the circumferential direction, or the second protrusions 124 are formed on the outer peripheral surface of the upper end of the cylinder 72. A plurality is formed in the circumferential direction.

Hereinafter, in the present exemplary embodiment, the first protrusion 122 is formed at the lower end of the fastening portion 110 of the cylinder cap 76 so as to be spaced apart by a predetermined distance in the circumferential direction.

Looking at the assembly and installation process for the automatic height adjustment leg of the drum washing machine according to an embodiment of the present invention configured as described above are as follows.

First, the friction member 82 is mounted in the mounting groove 78A of the piston 78, and the piston 78 is inserted into the cylinder 72 through the opened upper surface of the cylinder 72.

In addition, the elastic member 80 is inserted into the cylinder 72 through the opened upper surface of the cylinder 72 so that the lower insertion portion 78B of the piston 78 is inserted into the lower end of the elastic member 80. .

When the piston 78 and the elastic member 80 are inserted into the cylinder 72, the cylinder cap 76 is fastened to the upper end of the cylinder 72 to seal the opened upper surface of the cylinder 72. do.

At this time, the upper insertion portion 112A formed on the inner bottom surface of the cylinder cap 76 is inserted into the upper end of the elastic member 80 so that the elastic member 80 is the upper insertion portion 112A and the lower insertion portion 78B. It is stably installed by, and the piston 78 is elastically supported by the elastic member (80).

On the other hand, as the cylinder cap 76 is rotated and fastened to the upper end of the cylinder 72, the first protrusion 122 formed at the lower end of the fastening part 110 of the cylinder cap 76 is also rotated and lowered together. When the coupling of the cylinder cap 76 and the cylinder 72 is completed, the first protrusion 122 is locked to the second protrusion 124 formed on the outer circumferential surface of the upper end of the cylinder 72.

When the first protrusion 122 is locked to the second protrusion 124 as described above, the plurality of protrusions 126 protruding downward from the first protrusion 122 and the upward protrusion of the second protrusion 124 are protruded. Since the plurality of protrusions 128 are locked at the same time, the phenomenon in which the cylinder cap 76 is randomly loosened due to vibration and shock is sufficiently prevented by the locking force of the first protrusion 122 by the second protrusion 124. do.

In addition, since the first protrusion 122 is caught by the second protrusion 124 and cannot be lowered, the fastening position of the cylinder cap 76 is set by the first protrusion 122 and the second protrusion 124. This also prevents overfastening of the cylinder cap 76.

The cylinder 72 is installed perpendicular to the base bracket 68 mounted at the corner of the base 59 of the drum washing machine 50, and the cylinder 72 is formed in the through hole 69 of the base bracket 68. The boss portion 86 formed in the lower end of the through is inserted, and the fixing nut 74 is fastened to the boss portion 86 to fix the cylinder 72 to the base bracket 68.

When the cylinder 72 is installed and fixed by the fixing nut 74, an anti-loosening mechanism 100 is disposed below the fixing nut 74 and faces the hook hole 106 of the base bracket 68. The assembly direction of the anti-loosening mechanism 100 is adjusted so that the hook portion 104 is disposed at the position where the hook portion 104 is disposed.

Subsequently, when the release preventing mechanism 100 is raised toward the fixing nut 74, the fixing nut 74 is inserted into the tubular portion 102 of the release preventing mechanism 100, and the release preventing mechanism ( The hook portion 104 of the 100 is inserted into the hook hole 106.

As described above, when the release preventing mechanism 100 is raised until the fixing nut 74 is positioned inside the tubular portion 102 of the release preventing mechanism 100, the hook portion 104 is connected to the hook hole 106. After being penetrated into the upper surface of the base bracket 68, the release preventing mechanism 100 is fixed to the base bracket 68.

Therefore, since the tubular portion 102 of the anti-loosening mechanism 100 is fixed in a shape in which the outer circumferential surface of the fixing nut 74 is wrapped, it is preferable to arbitrarily adjust the fixing nut 74 by the anti-loosening mechanism 100. Since the structure is impossible, any loosening of the fixing nut 74 is prevented.

When the anti-loosening mechanism 100 is mounted to the outside of the fixing nut 74 as described above, the bolt portion 84A of the leg 84 is inserted into the boss portion 86 to penetrate the piston 78. The bolt 84A is fastened to the fastening groove, and the leg 84 is connected to the piston 78 as the leg 84 is inserted into the fastening groove.

At this time, the piston 78 is in a state of being in close contact with the lower portion of the cylinder 72 by the elastic member 80, the first locking projection 92 formed on the lower surface of the piston 78 is the cylinder 72 The second locking protrusion 94 is formed on the inner bottom of the hook to prevent the phenomenon in which the piston 78 is rotated together with the leg 84 when the bolt portion 84A and the fastening groove is fastened.

9 is a cross-sectional view showing a state in which the loosening prevention mechanism of the automatic height adjustment leg according to another embodiment of the present invention, Figure 10 is a loosening prevention mechanism of the automatic height adjustment leg according to another embodiment of the present invention Perspective view.

For reference, the same reference numerals are given to the same or similar components as those of the exemplary embodiment, and detailed description thereof will be omitted.

Automatic height adjustment leg of the drum washing machine according to another embodiment of the present invention, as shown in Figure 9 and 10, the tubular portion 132 of the anti-loosening mechanism 130 is the corner portion 74A of the fixing nut 74 A plurality of locking jaws 138 are formed on the inner circumferential surface such that the upper and lower jaws are inserted in the up and down direction, and the hook holes 136 of the base bracket 68 are formed at the corners 74A of the fixing nut 74. ) Is inserted into the locking step 138, the evacuation hole 140 is formed so as to communicate in the circumferential direction so that the hook portion 134 is caught, the other configuration is the same as the embodiment.

Here, the locking step 138 is a triangular protrusion projecting inward from the inner circumferential surface of the tubular portion 132, the tubular portion 132 so that the corner portion 74A of the fixing nut 74 is inserted in the vertical direction. It is formed in the inner circumferential surface of the elongated in the vertical direction, a plurality is formed along the inner circumferential surface of the tubular portion 132 so that the corner portion (74A) of the fixing nut 74 is caught in the circumferential direction.

The locking jaw 136 is caught by the maximum outer diameter portion of the fixing nut 74, but protrudes at an appropriate height from the inner peripheral surface of the tubular portion 132 so as not to be caught by the fixing nut 74 and the minimum outer diameter portion.

That is, the fixing nut 74 is a polygonal nut in which a plurality of corner portions 74A and the flat portion 74B are arranged in a polygonal shape along the outer circumference, and the maximum outer diameter is the corner portion 74A of the fixing nut 74. And the minimum outer diameter is the flat portion 74B between the corner portions 74A. Thus, the distance D3 between the latching jaws 136 disposed opposite the tubular portion 132 is determined by the fastening nut ( It protrudes to a diameter D3 that is larger than the minimum outer diameter D4 of 74 and smaller than the maximum outer diameter D1 of the fixing nut 74.

Since the corner portion 74A of the fixing nut 74 is inserted between the locking jaws 138 and circumferentially fastened by the locking jaws 138, the fixing nut 74 is an anti-loosening mechanism. Rotation is constrained by the 130 to prevent the fixing nut 74 from being arbitrarily loosened by the vibration and impact of the drum washing machine 50.

In addition, the evacuation holes 140 are formed to extend in the circumferential direction at both ends of the hook hole 136.

That is, since the position of the corner portion 74A is not always constant when the fixing nut 74 is fastened, the position of the tubular portion 132 mounted on the outside of the fixing nut 74 is also fixed to the fixing nut 74. A predetermined angle is changed in the circumferential direction by the corner portion 74A, and the position of the hook portion 134 together with the tubular portion 132 is also changed by a predetermined angle.

Accordingly, an evacuation hole 140 in which the hook portion 134 is hooked is formed at both ends of the hook hole 136 so that the hook portion 134 may be fixed to the base bracket 68 regardless of the position change. It is formed in communication.

The automatic height adjustment leg of the washing machine according to the present invention has been described with reference to the illustrated drawings, but the present invention is not limited to the above embodiments and drawings, and various modifications are made by those skilled in the art within the technical scope of the present invention. Of course, variations are possible.

That is, the automatic height adjustment leg is applicable not only to a washing machine but also to a product in which legs are installed in a base such as a dryer and a dishwasher.

In addition, the elastic member of the automatic height adjustment leg may be used in addition to the coil spring, a variety of elastic body, the friction member may be formed of a rubber material.

In addition, when the automatic height adjustment leg is installed directly on the base, a through hole and a hook hole are formed in the corner of the base.

The automatic height adjustment leg of the washing machine according to the present invention configured as described above is disposed so that the piston connected to the upper end of the leg is elastically moved inside the cylinder, and the cylinder and the base are fastened and fixed by a fixing nut and on the outer surface of the fixing nut. Since the anti-loosening mechanism is mounted, the piston and the leg are raised and lowered according to the height of the manual height adjusting leg installed at the other edge of the base, and the height and horizontality of the drum washing machine are automatically adjusted. The fixing nut is advantageously prevented from being arbitrarily adjusted or loosened by the consumer or an inexperienced maintenance worker.

In addition, since the loosening of the fixing nut is prevented by the loosening prevention mechanism as described above, the phenomenon that the automatic height adjustment leg is broken while flowing due to the vibration and shock of the drum washing machine is prevented in advance, and the function of the automatic height adjustment leg This loss is also an advantage of preventing the drum washing machine from over-vibrating or falling over.

In addition, since the release preventing mechanism is fixed to the base or the base bracket and the fixing nut is prevented from being rotated by the locking jaw of the release preventing mechanism, the phenomenon in which the fixing nut is arbitrarily released by vibration and shock of the drum washing machine, etc. There is an advantage to be avoided.

1 is a perspective view of a conventional drum washing machine,

2 is a perspective view of a drum washing machine according to an embodiment of the present invention;

Figure 3 is a perspective view of the automatic height adjustment leg of the drum washing machine according to an embodiment of the present invention,

Figure 4 is a cross-sectional view of the automatic height adjustment leg of the drum washing machine according to an embodiment of the present invention,

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a cross-sectional view taken along the line B-B of FIG.

Figure 7 is a perspective view showing a state in which the loosening prevention mechanism of the automatic height adjustment leg according to an embodiment of the present invention,

8 is a perspective view showing the loosening mechanism of the automatic height adjustment leg according to an embodiment of the present invention,

9 is a cross-sectional view showing a state in which the loosening prevention mechanism of the automatic height adjustment leg according to another embodiment of the present invention,

10 is a perspective view of the loosening prevention mechanism of the automatic height adjustment leg according to another embodiment of the present invention,

<Explanation of symbols on main parts of the drawings>

59: base 68: base bracket

69: through hole 70: automatic height adjustment leg

72: cylinder 74: retaining nut

76: cylinder cap 78: piston

80: elastic member 82: friction member

84: leg 86: boss

90: rotation preventing portion 92: first locking projection

94: second stopper 100,130: loosening prevention mechanism

102, 132: tubular portion 104, 134: hook portion

106, 136: hook hole 110: fastening portion

112: support portion 120: locking projection portion

122: first projection 124: second projection

126: projection of the first projection 128: projection of the second projection

129: stopper 138: jamming jaw

140: Evacuation Hall

Claims (7)

A boss having a boss portion penetrating the base of the washing machine downwardly downward; A fixing nut fastened to the boss portion penetrating the base; A piston movably disposed within the cylinder and provided with an elastic member between the cylinder; A leg fixed to the piston through the boss; Automatic height adjustment leg of the washing machine comprising a loosening prevention mechanism coupled to the base to surround the outer surface of the fixing nut. The method according to claim 1, One side corner of the base is formed with a through hole through which the boss portion of the cylinder penetrates, and the other side of the automatic height adjustment leg of the washing machine, characterized in that the hook hole is formed to hook the release preventing mechanism. The method according to claim 1, In the corner of the base is mounted a metal base bracket, One side of the base bracket is formed with a through hole through which the boss portion of the cylinder penetrates, and the other side is an automatic height adjustment leg of the washing machine, characterized in that the hook hole is formed to the hook preventing mechanism is coupled. The method according to claim 2 or 3, The anti-loosening mechanism includes a tubular portion formed to surround an outer circumferential surface of the fixing nut so that fastening and disassembly of the fixing nut are not possible, and a hook portion protruding upward from the tubular portion and hooked to the hook hole. Automatic height adjustment legs. The method according to claim 4, The tubular portion is an inner diameter is formed to the same size as the maximum outer diameter of the fixing nut, the outer height of the washing machine, characterized in that the outer diameter is formed larger than the outer diameter of the lower cylinder. The method according to claim 5, The fixing nut is a polygonal nut having a plurality of corners and flat portions arranged in a polygonal shape around the outer circumferential surface, The inner circumferential surface of the tubular portion automatic height adjustment leg of the washing machine, characterized in that the edge of the fixing nut is inserted in the vertical direction and a plurality of locking jaws are formed to be hung in the circumferential direction. The method according to claim 6, One side of the hook hole automatic height adjustment leg of the washing machine, characterized in that the evacuation hole for changing the position of the locking jaw is formed in the circumferential direction so that the interference of the locking jaw and the corner portion is avoided when the release preventing mechanism is mounted.