KR100838328B1 - High and low control device of desk and chair - Google Patents

Abstract

A height control device for a desk and chair is provided to allow a user to adjust a height of the desk or chair by him-/herself, and to prevent the height from being changed absolutely once it is adjusted. A height control device for a desk and chair includes: a main body(12); a support insertion hole(13), which is slid and fastened to a lower support of the desk or chair; a hanging lug, arranged in an upper end of the support insertion hole so that an upper end of the lower support is hanged thereon; a seating recess(15), formed in one side of the main body; a through-hole, formed between the seating recess and the support insertion hole; a cover, having a seating recess(15') to cover one side of the main body; a rack(19), from one side of which a hanging rod(20) is projected; and a pinion(21), configured in such a manner that it is engaged with the teeth formed on the upper surface of the rack, and having a grip(22) in its one side.

Description

High and low control device of desk and chair}

1 is an exploded perspective view showing a conventional height adjusting device.

Figure 2 is an exploded perspective view showing the height adjusting device of the present invention.

3 is a cross-sectional view of the present invention.

4 is a longitudinal cross-sectional view of the present invention.

5 is a functional state diagram of the present invention.

Figure 6 is another embodiment of the present invention.

Figure 7 is another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

12: main body 13: prop insertion hole 14: locking jaw

15, 15 ': seating groove 16: through hole 17: cover

19: rack 20: hook rod 21: pinion

23: stopper

The present invention is a height adjustment device that can easily adjust the height of the desk and the stool, the height adjustment device for books, stool for preventing the catching bar of the height adjustment device from being randomly escaped from the shore by repeated load Regarding, more specifically, in the height adjustment device for adjusting the height of the desk and the stool by installing the height adjustment device to the support and then formed by separating the up and down formed on both sides of the student desk and the stool up and down, A rack and pinion is installed between the main body and the cover of the height adjusting device, and a stopper is formed on the back side of the rack. To prevent the rack from retreating by supporting the rear of the rack with the stopper when the rack is advanced. Locking rod prevents the release from the holding well and also relates to a for easy adjustment of height.

Generally, books and stools used by students in school are produced in three different sizes based on the average height of each grade, so students with average height have great inconvenience in using books and stools. There were no problems, however, in the case of tall or small students, it was inconvenient to use books and stools.

Therefore, there is utility model registration No. 212306 in order to adjust the height of the book and the stool to remove the inconvenience, but this can be easily adjusted the height adjustment when adjusting the height of the desk and the stool with the height adjustment device. However, if the load is repeatedly applied to the top plate or the seat of the book, the stool rods retreat little by little, there was a problem that the catch rod is often released from the prop.

That is, the invention is divided into the upper column and the lower column holding the pillars installed on both sides of the book, the stool as shown in Figure 1 so that the upper column is inserted into the lower column up and down to adjust the height by the height adjustment device In the height adjustment device of the book, the stool of the stool, forming a support insertion hole (2) into which the lower support is inserted into the main body (1) of the height adjustment device, but the upper end of the support is caught by the upper end of the support support (2). A locking jaw is formed so as to form a seating recess 4 at one side of the main body 1, and a through hole 5 is formed between the seating recess 4 and the support insertion hole 2. The groove 4 has a structure in which a locking rod 7 protruding from the locking protrusion 8 and a spring 9 are installed, and then the cover 6 is fixed to the bolt 11 to fix the bolt 11. When pulling out and releasing (10), the locking rod (7) is inserted into the interior by the elasticity of the spring (9) As the height is adjusted on both sides the two phases, the locking rod (7) of the adjuster provided on the lower holding two to one person while pulling at the same time, could not adjust the height.

Therefore, in order to adjust the height of books and stool, more than two people were needed, so there was a lot of troublesome work.

There is a utility model registration No. 391125 to eliminate the above problems, but this has the advantage of being able to easily adjust the height of the book and the stool, but if the load is repeatedly applied to the upper plate of the desk and the seat of the stool, the catch rod is little by little. After the retreat, there was a problem that the catch rod completely escapes the upper column and the upper column naturally descends.

The present invention was created in order to eliminate the above problems, so that the height of the book, the stool can be adjusted by the person alone to facilitate the work, and at the same time, the height of the book, the stool is adjusted so that the natural height does not change. An object of the invention to provide a height adjustment device for books, stools.

A feature of the present invention for achieving the above object is to form a support insertion hole is inserted into the lower support fixed to the main body, to form a locking jaw to take the upper end of the lower support to the upper end of the support insertion hole, one side of the main body A recess is formed therein, but a through hole is formed between the seating recess and the support insertion hole, and the lower supporter is installed on both sides of the book, the height adjusting device which is fixed with a screw by covering a cover having a seating recess formed at the bottom of the main body. A height adjusting device of a book and a stool, the upper brace being inserted into the lower brace and inserted into the lower brace, the rack being installed in the seating groove of the cover to move forward and backward and protruding from one side of the rack; A pinion installed at an upper portion of the rack to be engaged with the teeth of the rack, and having a handle formed at one side thereof; It is installed in the rear of the rack to prevent the backward of the rack, consisting of a stopper provided with a handle on one side, described in detail below the configuration of the present invention based on the accompanying drawings.

As shown in the figure, the main body 12 forms a support insertion hole 13 inserted into and fixed to a lower support 31 of a book and a stool, and a lower support 31 at an upper end of the support insertion hole 13. The locking jaw 14 is formed to be caught by the upper end of the main body 12, and a side of the main body 12 is formed with a seating groove 15 is installed pinion 21, the seating groove 15 and the support insertion hole (13) The through hole 16 is formed between the upper and lower sides of the main body 12, and the cover 17 having a seating groove 15 'on which the rack 19 is installed is fixed with a screw 18, In the height adjustment device, the rack (19) is installed in the seating grooves (15, 15 ') between the main body 12 and the cover 17 so as to move forward and backward, and the rack (top of the rack 19) When the pinion 21 rotates by installing the pinion 21 to engage with the teeth of 19), the rack 19 moves forward and backward, but protrudes the catching rod 20 on one side of the rack 19, and Pinion (21) One side to form a handle (22).

In addition, the rack 19 is installed at the rear of the rack 19 so that when the rack 19 is retracted, the rack 19 can be freely moved by pulling the stopper 23, and the rack 19 is In the case of advancing, the stopper 23 is pushed to prevent the rack 19 from being pushed backward, and the stopper 23 forms a handle 24.

As described above, the present invention may be implemented by forming the support insertion hole 13 into an ellipse when the upper and lower supporters of the book and the stool are formed of an ellipse, as shown in FIG. Likewise, by installing the spring 25 at the rear of the rack 19, the rack 19 may be moved forward by the elasticity of the spring 25.

In the present invention configured as described above, when the height of the book and the stool is adjusted, as shown in FIGS. 3 (a) and 5 (a), the rack 19 is reversed (outwardly) so that the locking rod 20 is closed. , After leaving the upper column 30 of the stool to be able to adjust the height, and when the adjustment is completed, as shown in Figure 3 (b) and 5 (b) by advancing the rack 19 to hang the rod ( 20) the height is adjusted by hooking the upper column 30 and the lower column 31 of the book, the stool, and then pushing the stopper 23 on the rear side of the rack 19 to the rear of the rack to stop the stopper 23. The rack 19 is caught so that the locking rod 20 does not randomly reverse.

That is, when adjusting the height of the book and the stool, pull the stopper 23 so that the stopper 23 is separated from the rear of the rack 19, and then hold the handle 22 of the pinion 21 to rotate the rack 19. ) Backing up so that the catch rod 20 is separated from the upper column 30 of the book and the stool, so that the upper column 30 can be raised and lowered, so that the height of the book and the stool can be freely adjusted, and the adjustment is completed. When the handle 22 of the pinion 21 is grasped and rotated in the opposite direction to the above, the rack 19 moves forward and the catching rod 20 is caught by the upper column 30 of the book and the stool. When the adjustment is completed, and the adjustment is completed, push the stopper 23 to stop the stopper is located behind the rack 19, the locking rod 20 will not be reversed arbitrarily.

As described above, the present invention can adjust the height of a book and a stool alone so that the work can be easily performed, and at the same time, the height of the book and the stool can be adjusted so that the natural height does not change.

Claims (2)

The main body 12 has a support insertion hole 13 which is inserted into and fixed to the lower support of the book and the stool, and the locking jaw 14 is formed so that the upper end of the lower support is caught on the upper end of the support insertion hole 13. On one side of the main body 12, a seating groove 15 is formed, but a through hole 6 is formed between the seating recess 15 and the support insertion hole 13, and on one side of the main body 12. In the height adjustment device of the book and the stool fixed by covering the cover 17 having the seating groove 15 'formed thereon, it is installed in the seating groove 15' of the cover 17 and moves forward and backward, and the hooking rod (on one side) A rack 19 protruding from the rack 19; The rack is installed on the upper part of the rack 19 to engage with the teeth of the rack 19, one side of the handle, characterized in that consisting of a pinion 21 formed with a handle 22, the height adjustment device of the stool. The height of claim 1, wherein the stopper 23 is installed at the rear of the rack 19, and the handle 24 is formed at one end to prevent the backward of the rack 19. Regulator.

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