KR200481904Y1 - Foldable table legs - Google Patents

Abstract

The present invention relates to a leg structure that is provided in a folding manner by being moved and rotated on a lower surface of a table or a chair through a joining member. More specifically, the fixing protrusion is resiliently inserted and fixed in the fixing groove formed along the protrusion rim of the coupling member, so that the lower surface of the table or the chair and the upper surface of the leg are in surface contact with each other when the leg is standing, It is a folding leg structure.
The folding leg structure includes a moving ball formed on the vertical protrusion of the engaging member, a moving rotary shaft for moving and rotating the leg to and from the engaging member, and a lower rotary shaft for rotating the table, And a release lever for releasing the fixing protrusion inserted and fixed in the fixing groove so that the leg can be moved up and down and / or horizontally along the movement slot.

Description

{Foldable table legs}

The present invention relates to a leg structure provided in a folding manner by being moved and rotated through a joining member on the underside of a table or a chair. More specifically, the fixing protrusion is resiliently inserted and fixed in the fixing groove formed along the protrusion rim of the coupling member, so that the lower surface of the table or the chair and the upper surface of the leg are in surface contact with each other when the leg is standing, It is a folding leg structure.

Generally, a leg is installed on the lower surface of a table or a chair. These bridges can be largely divided into fixed type and folding type.

The fixed type is a structure in which the legs grounded on the floor surface are fixedly coupled to the undersurface of the table or the chair in the vertical direction. Such fixed type legs are always in a fixed state so that a firm supporting force of the legs can be secured. It is somewhat insufficient in terms of space utilization and storage convenience.

The folding type is a structure in which a leg coupled to a lower surface of a table or a chair is rotatably operated by a joining member and is installed so as to be able to be switched to a deployed and folded state. Therefore, the folding type can be folded or unfolded according to need, so that the space utilization and storage convenience are excellent.

However, what is more important than the folding leg structure is that when the leg is folded or unfolded, the leg condition can be maintained stably. Therefore, many methods have been proposed in the past for the folding of the folding leg structure and the stable maintenance of the leg at the time of spreading.

Such a conventional method can be roughly classified into two types. The first method is a diagonal connecting bar method which connects the lower surface of a chair or a chair with a diagonal line. Here, the middle portion of the oblique connecting bar is rotatably operated by the hinge coupling, so that the legs can be folded and unfolded, and the operation restriction device for restricting the rotational operation of the hinge- .

The second type is a fixing groove / fixing projection method in which a fixing groove is formed along the rim of a coupling member for rotatably coupling a lower surface and a leg of a table or a chair, and a fixing protrusion provided on the leg is inserted and fixed in a fixing groove of the coupling member.

The fixing groove / fixing projection method is proposed in Korean Patent No. 10-1349302 (folding leg of a wall-mounted chair; date of registration: 2014.01.02). The contents are provided with fixing grooves at intervals of 90 degrees on the protruding rim, and the legs are hingedly engaged with the engaging member which is engaged with the lower surface of the chair. And a leg is provided with a fixing lever which is inserted into the fixing groove and is provided with fixing protrusions for stably holding the legs when the legs are folded and unfolded. The fixing lever is coupled to a sliding bar formed in the leg and resiliently biased by a spring. Therefore, when the fixing protrusion is pulled out of the fixing groove by pulling the fixing lever, the leg is rotated around the hinge axis, and when the detached fixing protrusion reaches the other fixing groove, the fixing protrusion is operated again by the sliding action of the sliding bar, So that the state of the leg can be stably maintained.

In other words, the legs of the prior art can not be positionally displaced by the hinge shaft, which is operated only on the rotary shaft, to the coupling member, and only the rotary motion is possible. The hinge axis must be spaced a certain distance from the lower surface of the table or chair, and the minimum distance between the table and the upper surface of the chair is formed as a semicircular shape That is, more than half of the leg width is the minimum separation distance.

Therefore, in the above-mentioned prior art, it is impossible to make contact only if the upper surface of the leg is capable of touching the lower surface of the table or the chair as much as possible. Therefore, there is a structural limitation that the load applied to the table or the chair can not be supported by the entire leg, and all the load is applied to the hinge axis. Therefore, the prior art is suitable for small-sized products which are relatively less loaded, and is not suitable for large-sized products having a large load.

Korean Registered Patent No. 10-1349302 (Registered on Apr. 2014) Domestic registration room 20-0425324 (registered date: 2006.08.26) Korean Registered Patent No. 10-1072568 (Registered on October 10, 2011) Domestic registration room 20-0163862 (Registration date: October 4, 1999) Domestic registration room 20-0163863 (Registration date: October 4, 1999) Domestic registration room 20-0195263 (Registered on June 26, 2000) Domestic registration room 20-0460213 (registration date: May.05, 2012) Domestic Public Practice 20-2011-0000488 (Published on January 17, 2011) Domestic public office 20-2013-0005155 (Disclosure date: 2013.08.30)

The object of the present invention is to form a fixing groove along the rim of a coupling member for rotatably coupling a lower surface and a leg of a table or a chair, and a fixing projection provided on the leg is inserted and fixed in the fixing groove of the coupling member to maintain the folding and spreading state In the fixing groove and fixing projection method, the most effective method is adopted so that the lower surface of the table or the chair and the upper surface of the leg are in contact with each other, but a more economical and simple structure with a foldable leg structure capable of withstanding heavy loads .

The present invention relates to a fixing groove and a projection method in which a fixing groove is formed along a rim of a coupling member connecting a lower surface and a leg of a table or a chair and a fixing projection provided on an upper portion of the leg is inserted and fixed into a fixing groove of the coupling member One has the following structural features.

First, in the present invention, the fixing protrusion is resiliently inserted and fixed in the fixing groove formed along the protrusion rim of the coupling member so that the lower surface of the table or the chair and the upper end surface of the leg are in surface contact, A movable rotary shaft for moving and rotating the legs to and from the vertical member and a fixing projection which is inserted and fixed in the fixing groove by pushing the lower surface of the table or the chair by rotating the rotary rotary shaft about the axis, So that the legs can be moved up and down and / or left and right along the movement slot.

The moving hole may include a moving hole formed perpendicularly to the attachment plate; And a compensating moving ball formed at a lower end of the moving main body perpendicularly to the moving main body and compensating a distance of a predetermined length so that the moving rotating shaft is positioned at a lower end of the moving main body so that the fixing protrusion is inserted into the fixing groove Another feature.

Further, the release lever may include a rotation operation portion rotatably and axially coupled to the movement rotation axis; A handle extended on one side of the rotary actuating part; And a plunger extending from the other side of the rotary actuating part and pushing a lower surface of the table or the chair by the operation of the pull to release the fixing protrusion from the fixing groove.

The present invention provides a leg or a chair which is foldably formed on a lower surface of a chair by a joining member. When a table or a chair is not used, the legs can be folded to reduce the volume, It is easy to store.

Further, the fixing groove formed along the protrusion rim of the engaging member and the fixing protrusion formed on the leg rotatably coupled with the engaging member are elastically inserted and fixed to the fixing groove by the tension spring, whereby the folding and spreading state of the leg Can be stably maintained, so that the use state can be stably maintained even during unexpected external force during use.

In addition, when the leg is in an upright state, the upper surface of the leg is supported by a lower surface of a table or a chair, So that the heavy load applied to the table or the chair can be supported by the entire leg rather than the rotary shaft.

1 is an embodiment of a folding leg structure according to the present invention.
FIG. 2 is a perspective view of a folding leg structure according to the present invention; FIG.
Figure 3 is a flowchart of the operation of the inventive folding leg.

Hereinafter, the present invention will be described in detail. However, even if the configuration is indispensable for implementing the present invention, a detailed description of technologies that belong to known technologies or that can be easily carried out by a common technician from known technologies is omitted.

The present invention is characterized in that it has a leg structure provided on a lower surface of a table or a chair 1 so as to be movable and rotatable through a joining member 10 and fixed to a fixing groove 13 formed along a protruding edge of the joining member 10 The lower surface of the table or the chair 1 and the upper end surface of the legs 20 are in surface contact with each other when the projections 22 are resiliently inserted and fixed so that the legs 20 stand upright, .

The present invention relates to a locking device for a chair or a chair which is fixedly coupled to a lower surface of a chair or chair 1, And the legs 20 are coupled and installed.

The leg 20 is formed at its upper end with a shaft hole 21 fixed to the rotary shaft 30 and fixed to the fixing groove 13 of the engaging member 10 below the shaft hole 21, The projections 22 are protruded. In the present invention, the upper surface of the leg 20 is preferably flat.

The coupling member 10 is fixedly coupled to a lower surface of a table or a chair 1 and movably couples the legs 20 to the lower surface of the table or the chair 1.

The coupling member 10 includes a plate-like attachment plate 11 attached and fixed to a lower surface of a table or chair 1 through a coupling means such as a bolt, And a vertical protrusion 12 protruding and formed.

A movable slot 14 is formed on the protruding face of the vertical protrusion 12 and a fixing groove 13 is formed at intervals of 90 degrees along the protruding edge of the vertical protrusion 12. The fixing grooves 13 may be formed at intervals of 90 degrees with respect to the lower end point of the moving slots 14. The fixing grooves 13 may be formed when the legs 20 are in an upright state and in a folded state A total of two fixing grooves 13 are formed so that the fixing protrusions 22 are inserted and fixed.

3A, the movable slot 14 is in face-to-face contact with the attachment plate 11 while the upper face of the leg 20 is in an upright state. As shown in FIG. 3B, When the projection 22 is released from the fixing groove 13 of the engaging member 10, the leg 20 is rotatable about the movement rotary shaft 30. However, in order for the leg 20 to smoothly rotate, the top surface of the leg 20 should not be blocked by the attachment plate 11 during rotation. In order to prevent the upper surface from being disturbed by the attachment plate 11 when the leg 20 rotates, the leg 20 may be rotated only when the rotation axis of the leg 20 moves downward as shown in FIGS. 3c and 3d. For this reason, the present design moving slot 14 is formed as a long through hole on the vertical projection 12 of the engaging member 10.

The distance from the attachment plate 11 to one end of the starting point of the movable slot 14 is shorter than the distance from the upper end face of the leg 20 to the shaft hole 21. Therefore, when the leg 20 is standing up as shown in FIG. 3A, the upper end surface of the leg 20 can be brought into surface contact with the attachment plate 11. FIG.

The penetration length from one end of the moving slot 14 to the other end is longer than half the length of the leg 20 in the width direction. The leg 20 is moved in position while rotating along the moving slot 14 so that the upper edge of the leg 20 is caught by the attaching plate 11 because the length of the moving slot 14 is longer than half of the leg width It is possible to prevent the rotation from being disturbed.

The movable slit 14 formed as described above preferably has a slit main hole 141 formed to penetrate the slit plate 11 in a direction perpendicular to the slit plate 11, The compensation that is formed vertically through can be divided into the pupil 142.

3A to 3C, when the fixing projections 22 of the legs 20 are rotationally moved from the one fixing groove 13 to the other fixing groove 13, And moves and rotates along the movable main hole 141. [0064] As shown in FIG. 3D, when the movable rotary shaft 30 of the leg 20, which has moved and rotated along the movable main hole 141, reaches the lower end point of the other end of the movable main hole 141, The fixing protrusions 22 formed are inserted into the fixing grooves 13 of the vertical protrusions 12 of the engaging member 10 and fixed. At this time, it is necessary to move the movement rotary shaft 30 coupled to the leg 20 by a length that allows the fixing projection 22 to be inserted into the fixing groove 13. The fixing projection 22 is fixed And the movement of the movable rotary shaft 30 is possible because the compensating pores 142 are formed in the direction of being coupled to the grooves 13.

In addition, when three fixing grooves 13 are formed at intervals of 90 degrees along the protruding rim of the coupling member 10, the compensation may be performed such that the pupil 142 is formed on both sides of the lower end point of the movable main hole 141 .

The movable rotary shaft 30 engages the leg 20 with the engaging member 10 so that the leg 20 can move and rotate along the movable slot 14. [ The leg 20 can be rotated along with the movement slot 14 so that the fixing protrusion 22 of the leg 20 can be inserted and fixed into the fixing groove 13 of the engaging member 10. [

Stable coupling force between the fixing protrusions 22 and the fixing grooves 13 inserted and fixed as described above is possible by the tensile stress of the tension springs 40. Both ends of the tension spring 40 are coupled to the lower portion of the coupling member 10 and the upper portion of the leg 20 so that tensile stress is always applied between the coupling member 10 and the leg 20. Both ends of the tension spring 40 are preferably engaged with the spring hooks 15 and 23 formed on the engaging member 10 and the leg 20, respectively.

The engaged state of the fixing groove 13 and the fixing protrusion 22 is released by the operation of the release lever 50 axially coupled to the movement rotation shaft 30.

The release lever 50 includes a rotary operation portion 51 rotatably and axially coupled to the movement rotary shaft 30, a handle 52 extended from one side of the rotary operation portion 51, And a plunger 53 extending from the other side of the portion 51 and pushing the attachment plate 11 by the operation of the pull 52 to release the fixing projection 22 from the fixing groove 13 .

As shown in FIG. 1, the release lever 50 may be provided on both sides of the coupling member 10, or may be provided on the outer side of the coupling member 10, which is a pair of two, as shown in FIG. In this case, the movable rotary shaft 30 may be formed to be short as shown in FIG. 1 to fit the configuration of the release lever 50, or may be formed as shown in FIG.

2, the upper joining bar 19 and the lower joining bar 29 are respectively provided between the pair of joining members 10 and the legs 20 so that the joining member 10 and the legs 20, Can be installed. The upper joining bar 19 is in the form of a pipe connecting the inside of the pair of joining members 10, and the moving long hole 14 is provided on the inside of the pipe shape and the moving rotary shaft 30 is also installed internally.

The action of the present invention folding leg structure constructed as described above is as follows.

3A, when the leg 20 is in an upright state, the fixing protrusion 22 is resiliently engaged with the fixing groove 13 to maintain a stable fixed state, Even if a heavy load is applied to the table or the chair 1, the load can be applied to the entirety of the legs 20 without imposing a burden on the movable rotary shaft 30 .

In order to fold the leg 20 in the state of the leg 20 standing up in Fig. 3 (a), the handle 52 of the release lever 50, which rotates and rotates by the rotary operation portion 51 being axially engaged with the movement rotary shaft 30, The plunger 53 formed on the opposite side of the push handle 52 pushes the attachment plate 11 and the movable rotary shaft 30 moves downward along the movable main hole 141 and proceeds to Fig. Since the shaft 20 of the leg 20 is fixedly coupled with the movement rotary shaft 30 at this time, the leg 20 moves downward together with the movement of the rotary shaft 30, And is separated from the plate 11 as well as the fixing protrusion 22 from the fixing groove 13. Therefore, the legs 20 are rotatable about the movement rotary shaft 30.

3 (b), when the leg 20 rotates in a state of being able to rotate as shown in FIG. 3 (b), the upper end edge of the leg 20 is interfered with the attachment plate 11, And moves along the main body 141 while moving downward.

When the fixing projections 22 of the legs 20 reach the other fixing grooves 13 of the engaging member 10 as shown in Fig. 3D, the legs 20, which continue to rotate, The fixing projections 22 are elastically inserted into the fixing grooves 13 by the tensile stress of the tension springs 40 provided between the legs 20 so that the legs 20 are folded as shown in FIG. do. Here, the fixing protrusion 22 is elastically inserted into the fixing groove 13 because the leg 20 moves while the compensation rotary shaft 30 moves along the pupil 142.

When the folded leg 20 is extended, the user does not operate the release lever 50 but moves the legs 20 by hand so that the movement rotary shaft 30 shifts the compensation from the pupil 142 to the moving main body 141 and is rotated. The unfolding operation is started, and the rest of the process is performed in the reverse order to the process of folding the legs 20.

While the preferred embodiments of the present invention have been described above, the scope of rights of the present invention is not limited thereto, and the range of the present invention is substantially equivalent to that of the embodiments of the present invention. Various modifications may be made by those skilled in the art without departing from the technical idea. For example, in the present invention, the top surface of the leg 20 is configured to be in contact with the attachment plate 11. However, if necessary, the upper surface of the leg 20 may be configured to directly contact the lower surface of the table or the chair 1 Of course it is.

1: table or chair 10: coupling member
11: attachment plate 12: vertical protrusion
13: fixing groove 14:
141: Moving Maintainer 142: Rewarding the Pupil
20: Bridge 21:
22: Fixing projection 30: Moving rotary shaft
40: tension spring 50: release lever
51: rotation operation part 52: handle
53:

Claims (4)

A folding leg (20) foldably installed on a table or a lower surface of a chair (1)
A moving slot 14 is formed on a protruding surface of a vertical protrusion 12 protruding perpendicularly to the attachment plate 11 on an attachment plate 11 fixedly coupled to a lower surface of the table or the chair 1, An engaging member (10) having a fixing groove (13) at intervals of 90 degrees along a protruding edge of the vertical protrusion (12);
(20) having a shaft hole (21) and a fixing protrusion (22) at an upper portion thereof;
So that the leg 20 engages with the shaft hole 21 and the movable slot 14 and rotates along with the movement slot 14 to be inserted and fixed in the fixing slot 13. [ A movable rotary shaft 30 provided with:
A tension spring 40 having both ends coupled to the coupling member 10 and the leg 20 and having a tensile stress such that the fixing protrusion 22 is inserted and fixed in the fixing groove 13;
And a release lever (50) which is axially coupled to the movement rotary shaft (30) and pushes the attachment plate (11) by a rotation operation to release the fixing protrusion (22) from the fixing groove (13) Folding leg structure.
The method according to claim 1,
The upper surface of the leg 20 is formed in a flat surface and the upper surface of the leg 20 is in surface contact with the attachment plate 11 to support the load when the leg 20 stands up. Folding leg structure.
3. The method according to claim 1 or 2,
The movable slot 14 of the engaging member 10 includes a movable main hole 141 formed to penetrate through the attachment plate 11 in a vertical direction;
And the movable rotary shaft 30 is positioned at the lower end of the movable main hole 141 so that the fixing projections 22 are inserted into the fixing holes 141. [ And the compensation for compensating for a distance of a predetermined length to be inserted into the cavity (13) is made of the pupil (142).
The method according to claim 1,
The release lever (50) includes a rotary operation portion (51) rotatably and axially coupled to the movement rotary shaft (30);
A handle 52 extending from one side of the rotary actuating part 51;
A push rod 53 extending from the other side of the rotary operation part 51 and pushing the attachment plate 11 by the operation of the pull 52 to release the fixing projection 22 from the fixing groove 13, Wherein the folding leg structure comprises:

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