KR20070015284A - Auto leg of washing machine - Google Patents

Abstract

An automatic height adjusting leg of a washing machine is provided to automatically regulate height and horizontalness of the drum-type washing machine, and to prevent components from being randomly loosened. An automatic height adjusting leg(70) of a washing machine comprises: a cylinder(72) having a boss unit penetrated downward to pass through a base of the washing machine; a fixing nut(74) combined with the boss unit passing through the base; a piston disposed in the cylinder to be elastically moved; a leg(84) fixed with the piston through the boss unit; and a loosening preventive tool(100) mounted on the outer surface of the fixing nut so as to prevent the fixing nut from being randomly loosened. The loosening preventing tool has a tube unit surrounding the outer peripheral surface of the fixing nut; and a hanging unit formed at the upper side of the tube unit to be held on the upper surface of the fixing nut.

Description

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

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

2 is a perspective view showing a drum washing machine according to the present invention;

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

4 is a sectional view showing an automatic height adjustment leg of the drum washing machine according to 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.

7 is a perspective view of the fixing nut and the loosening prevention means of the automatic height adjustment leg according to the present invention,

8 is an exploded perspective view showing a cylinder and a cylinder cap of the automatic height adjustment leg according to 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 locking projection 100: loosening preventing means

102: tubular portion 104: locking portion

106: engaging jaw 108: insertion groove

110: fastening portion 112: support portion

120: engaging projection 122: first projection

124: second projection 126: projection of the first projection

128: projection of the second projection 129: stopper

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 that washes laundry through a process such as washing, rinsing, dehydrating, and drying to remove stains on 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 has been made to solve the above problems, an 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 that can be prevented from loosening the parts arbitrarily 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 disposed elastically movable within the body, a leg fixed to the piston through the boss, and an anti-loosening means mounted on an outer surface of the fixing nut to prevent any loosening of the fixing nut. Characterized in that configured.

The anti-loosening means includes a tubular portion formed to surround the outer circumferential surface of the fixing nut, and a locking portion formed on an upper portion of the tubular portion to be engaged with an upper surface of the fixing nut.

Here, the tubular portion is formed with an inner diameter larger than the maximum outer diameter of the fixing nut.

The outer circumferential surface of the tubular portion is formed to protrude a plurality of non-slip jaws so that the sliding is prevented.

The locking portion includes a locking jaw that protrudes inwardly from an upper portion of the tubular portion to be caught by an upper edge of the fixing nut, and a plurality of insertion grooves formed in the locking jaw so that the locking nut can pass through the locking jaw.

The locking jaw is formed along the circumference of the upper portion of the tubular portion, and the plurality of insertion grooves are formed in the locking jaw so as to correspond to the corner portion of the fixing nut.

The locking jaw is formed with an inner diameter smaller than the maximum outer diameter of the fixing nut and larger than the minimum outer diameter of the fixing nut so as to be caught between the maximum outer diameter portion and the minimum outer diameter portion of the fixing nut.

The upper surface of the fixing nut is formed to be inclined downward from the minimum outer diameter portion to the maximum outer diameter portion, and the locking jaw is formed to have a thickness smaller than the height difference between the minimum outer diameter portion and the maximum outer diameter portion so as to be located below the upper surface of the minimum outer diameter portion.

The insertion groove is formed in a structure in which the locking jaw is removed in a wider width than an edge of the fixing nut.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

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

As shown in FIG. 2, a drum washing machine according to the present invention includes a cabinet 51 forming an exterior, a tub (not shown) installed to be buffered by a spring and a damper inside the cabinet 51, and the A drum 52 rotatably disposed inside the tub and formed with a plurality of manual holes 52A, and installed on the inner side of the drum 52 so that laundry may fall by gravity when the drum 52 is rotated. It includes a plurality of lifters (53) for spreading the laundry so that, 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 possible to install.

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 of the automatic height adjustment leg of the drum washing machine according to the invention, Figure 5 is a cross-sectional view taken along the line AA of Figure 4, Figure 6 is a line BB of Figure 5 Figure 7 is a cross-sectional view is shown, Figure 7 is a perspective view of the fixing nut and the release preventing means of the automatic height adjustment leg according to the present invention, Figure 8 is a cylinder and a cylinder cap of the automatic height adjustment leg according to the present invention The exploded perspective view shown.

3 to 8, the automatic height adjustment leg of the drum washing machine according to the present invention is mounted perpendicular to the upper surface of the base bracket 68 and the boss portion 86 penetrating the base bracket 68. A cylinder 72 protruding downward from the lower end portion, a fixing nut 74 fastened to an outer circumferential surface of the boss portion 86 so that the cylinder 72 is fixed to the base bracket 68, and the cylinder 72. A cylinder cap 76 mounted in a screwed structure at an open upper end of the cylinder; a piston 78 movably disposed in the cylinder 72; and the piston so that the piston 78 is elastically supported. An elastic member 80 disposed between the 78 and the cylinder cap 76, a friction member 82 mounted on an outer surface of the piston 78 in frictional contact with the cylinder 72, and the cylinder ( The upper end portion is disposed to be movable to the boss portion 86 of the 72 and the upper portion It 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 fastened to the outer circumferential surface of the boss portion 86 so that the cylinder 72 is fixed to the base bracket 68.

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 means 100 is mounted on the outside of the fixing nut 74 to prevent any loosening of the fixing nut 74.

The anti-loosening means 100 is an injection molding 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 an upper end of the tubular part 102. It is formed in the engaging portion 104 is caught on the upper edge of the fixing nut (74).

Here, the tubular portion 102 is formed with an inner diameter (D2) larger than the maximum outer diameter (D1) of the fixing nut 74, a plurality of non-slip jaw (on the outer circumferential surface to facilitate the detachable operation of the tubular portion 102) 102A) is formed to protrude.

The inner diameter D2 of the tubular portion 102 as described above is preferably formed equal to the maximum outer diameter D1 of the fixing nut 74.

And, the locking portion 104 is a locking projection 106 formed to protrude inward on the upper portion of the tubular portion 102 so that the tubular portion 102 mounted on the fixing nut 74 does not flow down; It consists of a plurality of insertion grooves 108 formed in a structure in which the locking jaw 106 is removed so that the fixing nut 74 can be disposed inside the tubular portion 102 through the locking jaw 106.

The locking jaw 106 is smaller than the maximum outer diameter D1 of the fixing nut 74 to be caught between the maximum outer diameter portion and the minimum outer diameter portion of the fixing nut 74 and at the same time the The inner diameter D3 is larger than the minimum outer diameter D4.

At this time, since 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, the locking step 106 is the corner portion 74A. And the upper surface between the flat portion 74B.

In particular, the upper surface of the fixing nut 74 from the flat portion 74B to the edge portion 74A so that the thickness of the maximum outer diameter D1 portion is smaller than the minimum outer diameter D4 portion of the fixing nut 74. An inclined surface 74C is formed to be inclined downward.

The locking jaw 106 is formed to a thickness smaller than the height difference between the flat portion 74B and the corner portion 74A to be located below the upper surface of the fixing nut 74.

The insertion groove 108 has a width larger than that of the corner portion 74A of the fixing nut 74 so that the corner portion 74A of the fixing nut 74 can pass through the locking jaw 106. 106 is formed into a removed structure.

That is, when the fixing nut 74 is a hexagon nut, the inner diameter D3 of the locking jaw 106 is smaller than the outer diameter D1 of the corner portion 74A of the fixing nut 74 and the plane of the fixing nut 74 is fixed. The portion 74B is formed to be larger than the outer diameter D4, and six insertion grooves 108 are formed at the locking jaw 106 at 60-degree intervals so as not to catch the corner portion 74A of the fixing nut 74. .

The anti-loosening means 100 is such that the locking jaw 106 is caught on the upper surface of the corner portion 74A of the fixing nut 74 after the fixing nut 74 is inserted through the insertion groove 108. It rotates a predetermined angle in the circumferential direction.

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 as described above 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 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, the release preventing means 100 is disposed below the fixing nut 74, and faces the corner portion 74A of the fixing nut 74. The assembling direction of the release preventing means 100 is adjusted so that the insertion groove 108 is disposed at the position.

Thereafter, the release preventing means 100 is raised to the fixing nut 74 side, the corner portion 74A of the fixing nut 74 passes through the locking step 106 by the insertion groove 108 to It is inserted into the tubular portion 102 of the loosening prevention means (100).

When the release preventing means 100 is raised until the fixing nut 74 is positioned inside the tubular portion 102 of the release preventing means 100 as described above, the corner portion 74A of the fixing nut 74 is raised. The release preventing means 100 is rotated a predetermined angle in the circumferential direction so that the locking step 106 is located on the upper surface.

Therefore, since the locking step 106 of the release preventing means 100 is caught on the upper surface of the corner portion 74A of the fixing nut 74, the release preventing means 100 surrounds the outer circumferential surface of the fixing nut 74. It is fixed to the fixing nut 74 in the shape, the fixing nut 74 is a structure that can not be adjusted by the loosening prevention means 100 to prevent any loosening.

When the anti-loosening means 100 is mounted on the outer circumference 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.

As described above with reference to the illustrated drawings the automatic height adjustment leg of the washing machine according to the present invention, the present invention is not limited to the above embodiments and drawings, it is various by those skilled in the art within the technical scope of the 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.

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 means is mounted, the piston and the leg are elevated 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 and fixed by the anti-loosening means. There is an advantage that any loosening of the nut is prevented.

In addition, the phenomenon that the fixing nut is arbitrarily adjusted and released by the consumer or an unskilled mechanic as described above is prevented by the loosening prevention means, so that the automatic height adjustment leg is damaged while the drum washing machine vibrates and impacts, etc. This is prevented in advance, the function of the automatic height adjustment leg is lost, there is an advantage that the phenomenon of over-vibration or fall of the drum washing machine is also prevented.

Claims (9)

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 elastically movable within the cylinder; A leg fixed to the piston through the boss; Automatic height adjustment leg of the washing machine comprising a loosening prevention means mounted to the outer surface of the fixing nut to prevent any loosening of the fixing nut. The method according to claim 1, The anti-loosening means is a tubular portion formed to surround the outer circumferential surface of the fixing nut, and the automatic height adjustment leg of the washing machine, characterized in that it is formed on the upper portion of the tubular portion and the engaging portion is caught on the upper surface of the fixing nut. The method according to claim 2, The tubular portion automatic height adjustment leg of the washing machine, characterized in that formed with an inner diameter larger than the maximum outer diameter of the fixing nut. The method according to claim 3, Automatic height adjustment leg of the washing machine, characterized in that the outer circumferential surface of the tubular portion is formed so that a plurality of non-slip jaws protrude so as to prevent the sliding. The method according to any one of claims 2 to 4, The locking portion may include a locking jaw protruding inward from an upper portion of the tubular portion to be caught by an upper edge of the fixing nut, and a plurality of insertion grooves formed in the locking jaw to allow the fixing nut to pass through the locking jaw. Automatic height adjustment leg of the washing machine The method according to claim 5, The locking jaw is formed along the circumference of the upper portion of the tubular part, The insertion groove is a height adjustment leg of the washing machine, characterized in that a plurality is formed on the locking step to correspond to the corner of the fixing nut. The method according to claim 6, The locking jaw is an automatic height adjustment leg of the washing machine, characterized in that it is formed with an inner diameter smaller than the maximum outer diameter of the fixing nut and larger than the minimum outer diameter of the fixing nut so as to be caught between the maximum outer diameter portion and the minimum outer diameter portion of the fixing nut. . The method according to claim 7, The upper surface of the fixing nut is formed to be inclined downward from the minimum outer diameter portion to the maximum outer diameter portion, The locking step of the automatic height adjustment leg of the washing machine, characterized in that formed in a thickness smaller than the height difference between the minimum outer diameter portion and the maximum outer diameter portion to be located below the upper surface of the minimum outer diameter portion. The method according to claim 8, The insertion groove is a height adjustment leg of the washing machine, characterized in that the locking step is formed in a structure wider than the corner portion of the fixing nut.

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