JP3073878U - Tables that can be changed in height - Google Patents

Abstract

(57) [Summary] [Problem] The length of a leg can be stably changed by a simple operation.
Provide desks and casual kotatsu that can be used at any height so that they can be used while sitting or sitting. A plurality of grooves or protrusions, which are arranged in a mirror-like manner, are alternately arranged on the inner wall surfaces of a leg comprising a cylindrical portion and a rod portion slidably inserted into the cylindrical portion at least at a lower portion thereof. The strips are formed parallel to each other in the sliding direction, and on the outer wall surfaces of the rod portions that oppose each other,
A plurality of ridges or grooves arranged alternately in a mirror-like manner are formed in parallel with each other in the sliding direction, and the difference between the long and short sides is the rear end of the insertion in the groove and the insertion of the insertion in the ridge. When the rod is inserted into the above-mentioned cylindrical portion, one of the grooves slides while fitting with the other ridge, and the groove collides with the end of the ridge. When the insert is slid by reversing the direction of rotation of the shaft and inserting and sliding in the same way, the position of the groove and the end of the ridge that are mated with each other changes, so that the collision position changes and the height differs. Attach the legs to stop and fix on the top plate to make the device of the present invention.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to desks such as desks that can be changed in height and casual kotatsu. The term “desks” used in the present application refers to those used for desks, with the top plate and the legs supporting it as main structures.

[0002]

[Problems to be solved by conventional techniques and devices]

 Sometimes it is desirable to use the above desks at different heights, not only when using a kotatsu directly sitting on a tatami mat, etc., but also as a table while sitting on a chair. I need to change. However, at present, although there are folding legs, those that can change the height stepwise have unnecessarily complicated structures and have difficulties in cost, durability, appearance, operability, etc. Not converted. An object of the present invention is to solve such a problem.

[0003]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a desk having the following legs. That is, at least at the lower part, the leg AB composed of the cylindrical portion A and the rod portion B slidably inserted into the cylindrical portion A is alternately arranged in a mirror-like manner on the inner wall surfaces facing each other of the cylindrical portion A. A plurality of grooves 1 or ridges 2 are formed in parallel with each other in the sliding direction, and a plurality of ridges are arranged on the outer wall surfaces of the rod B opposite to each other in a mirror-like manner. 2 or grooves 1 are formed parallel to each other in the sliding direction, and the difference in length is formed at the rear end of the insertion in the groove 1 and at the front end of the insertion in the ridge 2, When the rod portion B is inserted into the cylindrical portion A, one of the grooves 1 slides while being fitted with the other ridge 2 and the groove 1 and the end of the ridge 2 collide with each other. Stopped, reversed in the direction of shaft rotation, and fitted together when inserted and slid similarly By changing the end position of the groove 1 and the ridge 2 to be joined, the position where the groove 1 and the ridge 2 come into contact is changed, so that the foot AB is stopped and fixed at different heights. The height of the table can be changed.

[0004] Here, if the leg AB is in the shape of a quadrangular prism in principle, the inversion operation is easy to understand, and it is easy to manufacture.

[0005] Although not shown in the drawings, an actual product may be provided with a cover for covering the sliding portion of the rod B.

Although the rod portion B is expressed as described above, the rod portion B may actually have a hollow cylindrical shape.

A groove 1 or a ridge 2 may be provided on either the cylindrical portion A or the rod B. However, when the groove 1 is provided on the cylindrical portion A, the rod B becomes a ridge 2 and vice versa. Of course, the other party is also reversed.

[0008] Also, although the ridge 2 is expressed in this manner, the same operation and effect can be obtained even if the ridge 2 is simply formed as a projection with the tip portion showing the difference between the long and short distances removed and the rear portion removed. Shall be equally included.

[0009]

[Action]

 Since the present invention has such a configuration, specifically, the cylindrical portion A is inverted as shown in FIG. 1 and FIG. 2 and the rod portion B is inverted as shown in FIG. 3 and FIG. Become. For example, when the rod portion B in the state of FIG. 3 is inserted into the cylindrical portion A of FIG. 1, the fitting groove 1 and the ridge 2 slide respectively, and at the end point, the groove 1 and the ridge 2 as shown in FIG. And the end of the ridge 2 are aligned so that they stand still. In this case, the slidable distance is sufficiently long, the legs AB are as shown in FIG. 7, and the tabletop 3 of the desk is lowered.

Next, when the rod portion B is turned 180 degrees and inserted into the cylindrical portion A in the state of FIG. 1 as shown in FIG. 4, the groove 1 and the ridge 2 similarly fit and slide. At this time, the end point is as shown in Fig. 6. Although the short groove and the long ridge meet at the end, the end of the long groove and the short ridge keep a predetermined distance. You won't bump into each other. Therefore, the slidable distance is short, the legs AB are as shown in FIG. 8, and the tabletop 3 of the desk is higher.

[0011]

[Embodiment of the invention]

 The outer diameter of the rod of the square prism and the inner diameter of the cylinder of the square cylinder are equal, and the groove formed on the inner wall of the cylinder has a width of 5 mm, a depth of 2 mm, and a length difference of 30 mm. The book and the long and short sides are alternately formed, and the other opposite surface is similarly formed like a mirror. Also, the ridges formed on the outer surface of the rod shall be formed in the same manner with the same width, height, and difference in length. Using this cylindrical part and the rod part inserted into it from below, it is a portable kotatsu whose height can be varied. The present invention is not limited to such an example.

[0012]

[Effect of the invention]

 As described above, according to the present invention, it is possible to immediately change the lower part of the leg by reversing the lower part and replace the lower part with another one, and to obtain an extremely stable and hard-to-break machine.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tubular portion of a leg of the present invention as viewed obliquely from below.

FIG. 2 is a perspective view of the same cylinder portion turned upside down and viewed from below.

FIG. 3 is a perspective view of the leg of the present invention as viewed obliquely from above.

FIG. 4 is a sketch of the rod portion turned upside down and viewed obliquely from above.

FIG. 5 is a position diagram of the end of the fitted groove and the ridge before the reversal.

FIG. 6 is a position diagram of the end of the fitted groove and the ridge after the reversal.

FIG. 7 is a low-level sketch of the present invention.

FIG. 8 is a partial sketch of the high state of the present invention.

[Explanation of symbols]

 A: cylindrical part B: rod part 1 groove 2 ridge 3 top plate

Claims (1)

[Utility model registration claims] 1. A plurality of grooves which are alternately arranged in a mirror-like manner on the inner wall surfaces of at least a lower portion of a leg comprising a cylindrical portion and a rod portion slidably inserted into the cylindrical portion. Or, the ridges are formed in parallel with each other in the sliding direction, and a plurality of ridges or grooves arranged alternately in a mirror-like manner on the outer wall surfaces opposite to each other in the rod portion in the sliding direction. In this case, the long and short gaps are formed at the rear end of the insertion in the groove and at the front end of the insertion in the ridge, and when the rod is inserted into the above-mentioned cylindrical portion, one side is formed. The groove is slid while fitting with the other ridge, and the slide is stopped by the end of the groove colliding with the end of the ridge. When moving, the end positions of the groove and ridge that fit each other change Legs to stop and fixed at different heights more striking position is changed, the desk such that can change the height, characterized in that attached to the top plate.