KR20160021695A

KR20160021695A - Desk capable of controlling height, leg of desk therefor and gear box therefor

Info

Publication number: KR20160021695A
Application number: KR1020140112491A
Authority: KR
Inventors: 이정원
Original assignee: (주)캠퍼스라인
Priority date: 2014-08-18
Filing date: 2014-08-27
Publication date: 2016-02-26

Abstract

A desk capable of controlling a height is disclosed. The desk capable of controlling a height comprises: an upper plate; height adjustable legs supporting the upper plate on both sides of the upper plate; and a connecting rod connecting a gap between the legs. Moreover, the height adjustable legs comprise: a gear box (300) to which the connecting rod is connected; a third cylinder (206) rotated by the gear box (300); a screw nut (208) fixated to a lower portion of the third cylinder (206); a second cylinder (204) accommodating the third cylinder (206), wherein an upper portion is opened; and a screw bolt (210) fixated to an internal floor of the second cylinder (204) and extended to the inside of the third cylinder (206) through the screw nut (208). The gear box comprises a worm gear and a worm wheel. The worm wheel is connected to the third cylinder (206).

Description

[0001] The present invention relates to a gear box having a height adjustable desk, a height-adjustable desk leg,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk capable of height adjustment, and more particularly, to a desk having a desk leg configured to adjust a height using a gear box and a connecting box suitable for the desk.

In general, a desk is a piece of furniture that is supported and used to read or write a book. A desk used in schools, academies, offices, etc., is made up of a top plate and a leg installed at the bottom of the top plate.

Such a desk is made so that its height can not be adjusted in most cases because the legs are fixed integrally with the top plate.

In order to solve this problem, a desk capable of adjusting the height has been developed. Conventional height adjustable desks were constructed by dividing the legs into two parts, upper and lower parts, using a method of pulling out or pushing the upper part and fixing it with a fixing member, or placing a height adjusting screw in the lower part of the leg.

Fig. 21 shows an example of a conventional height-adjustable desk in the manner of adjusting the upper portion of the legs.

21, a leg supporting the upper plate 10 is divided into an upper leg 30 and a lower leg 20, and a plurality of through holes 33 are formed in the upper leg 20. The upper leg 30 is inserted into the lower leg 20 and adjusts the height by fitting the fixing member 60 into one of the through holes 33.

However, the leg shown in Fig. 21 can be adjusted in height only in units corresponding to the intervals of the through holes, and has a problem that it must be manually operated. The problem of manual operation can cause serious disturbances when having multiple legs. For example, in the case of a desk having four legs installed at four corners, the height of each leg must be adjusted to be the same so that the horizontal state of the upper plate 10 can be maintained.

On the other hand, adjusting the height by adjusting the height adjusting screw on the bottom of the leg has a limitation that the adjusting range of the height adjusting screw is not large, and there is also a problem that it must be manually operated. Further, even when a height adjusting screw is used, the height of each leg must be carefully adjusted.

As another method, it has been proposed to simultaneously adjust the height of the entire leg using a power transmission device.

22 to 23 show a conventional height-adjustable desk using a transmission device.

22 to 23, the leg is composed of an outer case and an inner case. The inner case can be slid while being inserted into the outer case. A fixing device for fixing the wire is provided on one side of the outer case, and the wire is wound to the other side of the outer case by winding the lower portion of the inner cylinder. The wires on each leg are connected to a single pulley. When the pulley is rotated by the rotational force of the motor, the pulley is wound around the wire, and the inner leg is pulled up as the wire is wound.

However, the desk as shown in Figs. 22 to 23 is not suitable as a prefabricated desk in which only the legs are installed separately because the outer legs, the inner legs, and the like must be integrally installed.

In addition, even if the motor is rotated by the slack of the wire, the driving forces transmitted to the respective legs are different from each other. As a result, it is difficult to maintain the horizontal state of the upper plate. There is also a problem that it is not.

On the other hand, lubricating oil must be applied to maintain the wire. However, since the lubricating oil damages the dust by the lubricating oil, it is not suitable for a normal office environment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a desk which can adjust the height easily by using a power transmission device.

It is another object of the present invention to provide a desk having a height adjustable desk leg which can easily adjust the height by using a transmission device.

It is still another object of the present invention to provide a desk capable of adjusting the height by using a gear box.

It is still another object of the present invention to provide a connecting box for effectively transmitting a driving force between the gear boxes.

1 is a perspective view of a desk according to an embodiment of the present invention. FIG. 5 is a perspective view of a desk according to an embodiment of the present invention. In which the gear box shown in Fig.

Top plate;

A height adjustable leg supporting the top plate at both sides of the top plate;

And a connecting rod connecting the legs,

Here, the height-adjustable leg

A gear box 300 to which the connecting rod is connected;

A screw bolt 506 rotated by the gear box 300;

A second cylinder 504 that receives the screw bolt 506 and opens at an upper portion thereof;

A screw nut 508 fixed to the upper end of the second cylinder 504 and screwed to the screw bolt 506;

A third cylinder (516) receiving the second cylinder (504) and having an open top;

And a control unit.

And a first cylinder 502 fixed to the gear box 300 and inserted into the second cylinder 504 while accommodating the screw bolt 506.

Here, it is preferable to further include a height adjusting screw 510 installed at a lower portion of the third cylinder 504.

Here, it is preferable to further include sliding patches 512 and 514 installed between the contact surfaces of the first cylinder 502 and the second cylinder 504.

It is preferable that the gear box housing 302 further includes a flange 302a for receiving the gear box 300 and fixing the gear box 300 to the upper plate.

Here, the gear box includes a worm gear and a worm wheel, and the worm wheel is connected to the screw bolt 506.

The connecting box may further include a connecting box connecting the connecting rods between the gear boxes.

1, a height adjustable desk according to another embodiment of the present invention is shown in FIG. 1 of the present invention. The height adjustable desk leg shown in FIG. 5 is used, As a gearbox application,

Top plate;

And a connecting rod connecting the legs,

The height-adjustable leg

A gear box 300 to which the connecting rod is connected;

A screw bolt 506 rotated by the gear box 300;

A screw nut 508 fixed to the upper end of the second cylinder 504 and screwed to the screw bolt 506; And

/ RTI >

The gear box includes a worm gear and a worm wheel, and the worm wheel is connected to the screw bolt (506).

The apparatus further includes a first cylinder 502 fixed to the gear box 300 and inserted into the second cylinder 504 while receiving the screw bolt 506.

Here, a height adjusting screw 510 installed at a lower portion of the third cylinder 504 is further provided.

In this case, sliding patches 512 and 514 are provided between the contact surfaces of the first cylinder 502 and the second cylinder 504.

The gearbox housing 302 may further include a flange 302a for receiving the gear box 300 and fixing the gear box 300 to the upper plate.

It is preferable to further include a gear box housing which receives the gear box 300 and has a hinge 302c formed on the upper portion thereof so that the gear box 300 and the leg 200 can be folded Do.

The connecting box for achieving another object of the present invention is shown in FIG. 16 of the present invention,

A tubular housing;

A connecting rod receiving portion provided at both ends of the housing; And

An elastic spring installed between the connecting rod accommodating portions;

/ RTI >

Here, the connecting rod receiving portion on one side is fixed to the housing, and the connecting rod receiving portion on the other side is slidable with respect to the housing.

The height adjustable desk according to the present invention has the effect of precisely and easily adjusting the height of the upper plate.

The height adjustable desk according to the present invention can precisely and easily adjust the height of the upper plate by using a gear box.

The connecting box according to the present invention can be easily separated from / engaged with the gear box, thereby making it possible to easily construct a prefabricated desk.

The desk according to the present invention can adjust the height and fold the legs, so that the desk can be easily assembled and moved.

FIG. 1 shows an embodiment of a height adjustable desk according to the present invention.
Fig. 2 shows a configuration in which a top plate is removed from a desk shown in Fig.
Fig. 3 shows a first embodiment of a height-adjustable desk leg attached to a desk shown in Fig.
FIG. 4 shows a second embodiment of a height adjustable desk leg attached to a desk shown in FIG.
FIG. 5 shows a third embodiment of a height adjustable desk leg attached to a desk shown in FIG.
6 is for explaining the principle of the gear box according to the present invention.
Fig. 7 shows a first embodiment of the gear box shown in Fig.
Fig. 8 shows a detailed configuration of the connection portion shown in Fig.
9 shows the bevel gear of the gearbox shown in Fig.
Fig. 10 shows the appearance of the second bevel gear.
11 is an exploded view of the gear box shown in Figs. 7A to 7C. Fig.
Fig. 12 shows a second embodiment of a gear box according to the present invention.
13 is an exploded view of the gear box shown in Fig.
Fig. 14 shows a third embodiment of a gear box according to the present invention.
15 shows the appearance of the connecting box.
Fig. 16 shows a detailed configuration of the connecting box shown in Fig.
17 shows the connection state of the connecting box and the gear box.
18 shows another embodiment of a height adjustable desk according to the present invention.
19 shows another embodiment of a height adjustable desk according to the present invention.
Fig. 20 shows an example of a height-adjustable leg applied to the desk shown in Fig.
Fig. 21 shows an example of a conventional height-adjustable desk in the manner of adjusting the upper portion of the legs.
22 to 23 show a conventional height-adjustable desk using a transmission device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a height adjustable desk according to the present invention.

1, a desk 1000 according to an embodiment of the present invention includes a top plate 100 and a height adjustable leg 200 for supporting the top plate 1000 on both sides of the top plate 100.

When the gear box 300 is operated, for example, when the motor 400 (see FIG. 18) connected to the gear box 300 rotates and the second bevel gear (not shown) of the gear box interior 300 rotates, The screw bolt connected to the gear box 300 rotates and the distance between the gear box 300 and the upper part of the leg 200 is adjusted.

Since the upper plate 100 is placed on the upper surface of the gear box 300, the height of the upper plate 100 is adjusted according to the operation of the gear box 300.

Fig. 2 shows a configuration in which a top plate is removed from a desk shown in Fig.

2, the desk 1000 according to an embodiment of the present invention has two legs 200 on the left and right sides, a gear box 300 is installed on the upper part of the leg 200, A connecting box 600 is provided between the connecting terminals.

The gear box 300 includes three bevel gears meshed with each other at right angles (Figs. 7A to 7C or 12A to 12B) or a worm gear (Fig. 15) The detailed configuration will be described later separately.

The connecting box 600 is for connecting the connecting rods 704 and 706, and the detailed configuration thereof will be separately described later.

Fig. 3 shows a first embodiment of a height-adjustable desk leg attached to a desk shown in Fig.

3, the height adjustable desk leg 200-1 according to the first embodiment of the present invention includes a gear box 300, a gear box housing 300 which houses the gear box 300, A hollow first cylinder 202 connected to the lower side of the gear box housing 302 and extending downward, a hollow second cylinder 204 opened upward to receive the first cylinder 202, A third cylinder 206 rotated by the operation of the box 300 and extending into the first cylinder 202, a screw nut 208 fixed to the lower end of the third cylinder 206, a screw nut 208, And a screw bolt (210) threaded through the screw nut (208) and extending into the third cylinder (206). Here, the lower end of the third cylinder 208 is rotatably supported at the lower end of the first cylinder 202, the lower end of the screw bolt 210 is fixed to the bottom of the second cylinder 204, 204 are supported by the leg-rest 210. On the other hand, a flange 302-a is provided on the upper side of the gear box housing 202, and is fixed to the upper plate 100 through the flange 302-a. A screw can be used as a coupling means to the upper plate 100.

When the gear box 300 is operated, for example, when the motor 400 connected to the gear box 300 rotates and the second bevel gear (not shown) of the gear box interior 300 rotates, The second cylinder 206 and the screw nut 208 rotate in the same direction. Since the screw nut 208 is fixed to the second cylinder 206 and is screwed to the screw bolt 210, the height of the screw nut 208, that is, the height of the second cylinder 206, The distance from the bottom of the screw 204 to the screw nut 208 is varied. The change in height of the screw nut 208 corresponds to the change in height of the gear box 300.

Since the upper plate 100 is placed on the upper surface of the gear box 300, the height of the upper plate 100 is adjusted according to the operation of the gear box 300. Reference numerals 212 and 214 denote sliding patches provided between the contact surfaces of the first cylinder 202 and the second cylinder 204. [

The gear box 300 can be driven by the electric motor 400. [

FIG. 4 shows a second embodiment of a height adjustable desk leg attached to a desk shown in FIG.

Referring to FIG. 4, the height adjustable desk leg 200-2 according to the second embodiment of the present invention includes a gear box 300, a gear box housing 300 which houses the gear box 300, A hollow first cylinder 502 connected to the lower side of the gear box housing 302 and extending downward, a hollow second cylinder 504 accommodated in the first cylinder 502 and having an open top, A screw bolt 506 which is rotated by the operation of the box 300 and extends into the first cylinder 502, a screw nut 508 which is fixed to the upper end of the second cylinder 504 and is screwed with the screw bolt 506 ). Here, a height adjusting screw 510 may be installed on the lower portion of the second cylinder 504.

When the gear box 300 is operated, for example, when the motor 400 connected to the gear box 300 rotates and the second bevel gear (not shown) of the gear box interior 300 rotates, The screw bolt 506 rotates in the same direction. The screw bolt 506 is screwed to the screw nut 508 fixed to the upper end of the second cylinder 504 so that the height of the screw nut 508 in accordance with the rotation of the screw bolt 508, 300 to the screw nut 508 varies. The height change of the screw nut 508 corresponds to the height change of the gear box 300. [ Since the upper plate 100 is placed on the upper surface of the gear box 300, the height of the upper plate 100 is adjusted according to the operation of the gear box 300.

FIG. 5 shows a third embodiment of a height adjustable desk leg attached to a desk shown in FIG.

Referring to FIG. 5, the height adjustable desk leg 200-3 according to the third embodiment of the present invention includes a first cylinder 502 and a second cylinder 504 in addition to the second embodiment shown in FIG. 4 (Not shown). The height adjusting screw 510 is installed at the bottom of the third cylinder 512.

4, the second cylinder 504 is exposed to the outside as the upper plate 100 is lifted, so that the second cylinder 504 appears as if it extends. However, as shown in FIG. 5, The desk leg 500 looks like the gear box 300 is lifted when the upper plate is lifted because the second cylinder 504 is not exposed.

6 is for explaining the principle of the gear box according to the present invention.

6 are shown for explaining the basic principle of the gear box 300-1 of the first embodiment and the gear box 300-2 of the second embodiment. Although the angles between the first bevel gear 304 and the second bevel gear 306 are different in the gear box 300-1 of the first embodiment and the gear box 300-2 of the second embodiment, Therefore, the configuration of the bevel gear of the gear box 300-2 of the second embodiment will be described in accordance with the configuration of the bevel gear of the gear box 300-2 of the second embodiment, and the configuration of the bevel gear of the gear box 300-1 of the first embodiment will be omitted. On the other hand, the configuration of the bevel gear according to the first embodiment will be described in detail with reference to Figs. 7A to 7C.

Referring to FIG. 6, the gear box 300 includes a body 300a, an inner wall 300b, a first bevel gear 304, a second bevel gear 306, and a third bevel gear 308. The first bevel gear 304 to the third bevel gear 308 are arranged to be perpendicular to each other. The first bevel gear 304 is used as a drive gear, and the second bevel gear 306 and the third bevel gear 308 are used as driven gears. The inner wall 300b is formed inside the body 300a of the gear box 300 to support the first to third bevel gears 304 to 308. The inner wall 300b has at least three support surfaces, and each support surface is perpendicular to the adjacent support surface.

The first bevel gear 304 and the third bevel gear 308 have the same size and number of gears and the size and the number of gears of the second bevel gear 306 are different from each other between the first bevel gear 304 and the second bevel gear 308. [ Is larger than that of the gear 308. This is intended to increase the driving force transmitted to the second bevel gear 306 and the third bevel gear 308.

The gear shaft of the second bevel gear 306 is vertically connected to a member for raising / lowering the top plate 100. The gear shafts of the first and third bevel gears 304 and 308 are connected horizontally to the motor 400 or the connecting box 600. Reference numerals 310 to 314 denote bearings.

6 is characterized in that the first bevel gear 304 to the third bevel gear 308 are supported by an inner wall 300b provided inside the body 300a.

More specifically, the upper portions of the first bevel gear 304 to the third bevel gear 308 are formed in a trapezoidal shape and contact with the support surfaces of the support wall body 300b formed in the body 300a, (304) to the third bevel gear (308). For example, when the first bevel gear 304 rotates in accordance with the rotation of the first connecting rod 702 connected to the motor 400, the first bevel gear 304 is rotated by the bearing 310, So that the coupling with the neighboring bevel gear 306 is secured by the rotation of the head portion of the head supporting member 300 in contact with the supporting surface of the supporting wall body 300b.

Fig. 7 shows a first embodiment of the gear box shown in Fig.

The first embodiment 300-1 of the gear box according to the present invention is characterized in that the first to third bevel gears 304 to 308 are perpendicular to each other as shown in Figs. 7A to 7C, The three bevel gears 304 and 308 are arranged so as to be laterally perpendicular to each other and to be disposed such that the second bevel gear 306 faces downward. In contrast, in the second embodiment of the gear box according to the present invention, the first bevel gear 304 and the third bevel gear 308 are placed on a straight line, and the second bevel gear 306 is arranged vertically downward .

Referring to FIG. 7A, concave connecting portions 320, 322, and 324 are formed on the front surface, the left side surface, and the bottom surface of the main body 300a. The connection portions 320, 322 and 324 are provided for inserting and fixing the respective bevel gears 304, 306 and 308. Each of the connecting portions 320, 322, and 324 is provided with a bevel gear seating portion, a bearing seating portion, and a snap ring insertion groove.

Referring to FIG. 7A, a first connecting portion 320 is shown in which a first bevel gear 304 is inserted from a front view of an upper center. The shaft hole 320a and the support wall surface 320b of the first connection portion 320 and the space portions 326 and 328 are shown.

A third connecting portion 324 into which the third bevel gear 308 is inserted is shown from the left side view of the upper left side. The shaft hole 324a and the support wall surface 324b of the third connection portion 324 and the space portions 326 and 328 are shown.

On the other hand, a second connecting portion 322 through which the second bevel gear 306 is inserted is shown from the lower bottom view. The shaft hole 322a and the support wall surface 322b and the space portions 326 and 328 of the second connection portion 322 are shown in the figure. Each of the connection portions 320, 322, and 324 has a supporting wall surface,

A gear seating portion, a bearing seating portion, and a snap ring insertion groove.

7B is a perspective view showing the first connection part 320 and the third connection part 324.

Referring to FIG. 7B, a shaft hole 320a, a supporting wall surface 320b, a bevel gear seating portion 320c, a bearing seating portion 320d, and a snap ring insertion groove 320e are installed in the first connection portion 320.

The shaft hole 320a is where the protruding portion 304a protruding from the head portion of the first bevel gear 304 is inserted and the supporting wall surface 320b supports the flat portion of the head portion of the first bevel gear 304 A bearing ring 320c is a space for receiving the bearing 330. A snap ring 336 for preventing the first bevel gear 304 and the bearing 310 from coming off is provided in the snap ring insertion groove 304e. .

7C is a perspective view showing the first connection part 320, the second connection part 322, and the third connection part 324.

The detailed configuration of the second connection portion 322 and the third connection portion 324 shown in FIG. 7C is the same as the configuration of the first connection portion 320 except for the size, and thus a detailed description thereof will be omitted.

Space portions 326 and 328 for communicating between the connection portions 320, 322 and 324 are formed. And the bevel gears 304 to 308 are engaged through the space portions 326 and 328.

Fig. 8 shows a detailed configuration of the connection portion shown in Fig.

8 is a side view showing the lower left side of the gear box 300 shown in FIG. 7, that is, the third connecting portion 324 side. 8, the first connection part 320 and the second connection part 322 are shown by dotted lines. The shaft hole 324a and the support wall 324b are shown.

8, the configurations of the second connection portion 322 and the first connection portion 320 are shown. A portion of the second connecting portion 322 and the bevel gear receiving portion 320c of the first connecting portion 320 overlapping each other on the slightly right side in the center is a portion corresponding to the space portion 326 The second bevel gear 306 seated on the bevel gear seating portion 322c of the second connection portion 322 and the first bevel gear 306 seated on the bevel gear seating portion 320c of the first connection portion 320 304 are engaged with each other in the space portion 326.

On the other hand, the second bevel gear 306 mounted on the bevel gear seating portion 322c of the second connecting portion 322 and the first bevel bearing 324c seated on the bevel gear seating portion 324c of the third connecting portion 324, The gears 308 are engaged with each other in the other space portion 328.

9 shows the bevel gear of the gearbox shown in Fig.

9 is the second bevel gear 306, and the first and third bevel gears 304 and 308 are shown on the lower side. The first bevel gear 304 and the third bevel gear 308 are of the same size and the second bevel gear 304 has a larger diameter than the first and third bevel gears 304 and 308 and has many gears.

9, the second bevel gear 306 is composed of a projection 306a, a gear portion 306b, a bearing support portion 306c, and an insertion portion 306d. The projecting portion 306a is inserted into the shaft hole 322a of the second connecting portion 322 as a portion projecting along the axial line at the head portion of the gear portion 306b. The gear portion 306b is a main portion of the bevel gear and the bearing support portion 306c is a portion where the bearing is fitted and the insertion portion 306d is a portion for engaging with the screw bolt 506 or the third cylinder 206 / RTI >

On the other hand, the configurations of the first bevel gear 304 and the third bell gear 306 are similar to those of the second bevel gear 306 except for the size and the number of gears. However, the connecting rod inserting portions 304d and 308d are concave and depressed portions so that the connecting rods 702 and 704 can be inserted. The connecting rod insertion portions 304d and 308d preferably have a cross section corresponding to the cross-sectional shape of the connecting rods 702 and 704, and preferably have a hexagonal cross-section.

Fig. 10 shows the appearance of the second bevel gear.

The first bevel gear 304 and the third bevel gear 308 are of the same size and the second bevel gear 304 has a larger diameter than the first and third bevel gears 304 and 308 The configurations of the first to third bevel gears 304 to 308 are similar.

.

11 is an exploded view of the gear box shown in Figs. 7A to 7C. Fig.

11, a second bevel gear 306 is installed through a second connecting portion 322 and a screw bolt 506 is coupled to an inserting portion 306d of the second bevel gear 306 . The third cylinder 206 may be coupled to the insertion portion 306d of the second bevel gear 306. On the other hand, the ring 312 is inserted into the bearing support portion 306c.

The third bevel gear 308 is installed through the third connecting portion 324 and the connecting rod 704 is coupled to the connecting rod inserting portion 308d of the third bevel gear 308. [ On the other hand, the bearing 314 is inserted into the bearing support portion 308c.

Fig. 12 shows a second embodiment of a gear box according to the present invention.

The second embodiment of the gear box according to the present invention is such that the first bevel gear 304 to the third bevel gear 308 are arranged perpendicular to each other. 12, the second embodiment of the gear box according to the present invention is characterized in that the first bevel gear 304 and the third bevel gear 308 are placed on a straight line and the second bevel gear 306 Is disposed vertically downwardly therefrom.

Referring to FIG. 12A, concave connecting portions 340, 342 and 344 are formed on both sides and bottom of the main body 300a. The connection portions 340, 342 and 344 are provided for inserting and fixing the respective bevel gears 304, 306 and 308.

Each of the connecting portions 340, 342, and 344 is provided with a supporting wall surface, a bevel gear seating portion, a bearing seating portion, and a snap ring insertion groove.

Referring to FIG. 12A, a second connecting portion 342 is shown in which the second bevel gear 304 is inserted from a central bottom view. Further, the shaft hole 342a and the support wall body 342b of the second connection portion 342 are shown.

A third connecting portion 344 into which the third bevel gear 306 is inserted is shown from the left side view of the left side. Further, the shaft hole 344a and the support wall 344b and the space portion 346 of the third connection portion 344 are shown.

On the other hand, the first connecting portion 340 into which the first bevel gear 304 is inserted is shown from the right side view of the right side. In addition, the shaft hole 340a, the support wall 340b, and the space portion 348 of the first connection portion 340 are shown.

12B is a perspective view showing the third connection part and the second connection part.

Referring to FIG. 12B, a shaft hole 342a, a supporting wall surface 342b, a bevel gear seating portion 342c, a bearing seating portion 342d, and a snap ring insertion groove 342e are provided in the second connection portion 342.

The shaft hole 342a is where the protruding portion 306a protruding from the head portion of the second bevel gear 306 is inserted and the supporting wall surface 342b is a portion supporting the flat portion of the head portion of the second bevel gear 306 And a snap ring 336 for preventing the second bevel gear 306 and the bearing 332 from separating from the retaining groove 342e is formed in the retaining ring insertion groove 342e. .

The detailed configuration of the first connection part 340 and the third connection part 344 is the same as the configuration of the second connection part 342 except for the size, and a detailed description thereof will be omitted.

On both sides of the support wall surface 342b, space portions 346 and 348 for communicating between the connection portions 320, 322 and 324 are formed. And the bevel gears 304 to 308 are engaged through the space portions 326 and 328.

13 is an exploded view of the gear box shown in Fig.

13, a second bevel gear 306 is installed through a second connecting portion 342 and a screw bolt 506 is coupled to an inserting portion 306d of the second bevel gear 306 . The third cylinder 206 may be coupled to the insertion portion 306d of the second bevel gear 306. On the other hand, the bearing 332 is inserted into the bearing support portion 306c.

The first bevel gear 304 is installed through the first connecting portion 340 and the connecting rod 702 is coupled to the connecting rod inserting portion 304d of the first bevel gear 304. On the other hand, the bearing 330 is inserted into the bearing support portion 308c. The connecting rod 702 connected to the first connection part 340 may be connected to the electric motor 400.

The third bevel gear 308 is installed through the third connecting portion 344 and the connecting rod 704 is coupled to the connecting rod inserting portion 308d of the third bevel gear 308. [ On the other hand, the bearing 334 is inserted into the bearing support portion 308c.

1, one of the two gearboxes 300 on the left and right sides can be a gearbox according to the first embodiment of the present invention, and the other gearbox can be a gearbox according to the second embodiment of the present invention. have. That is, the gear box according to the second embodiment of the present invention can be used to receive the driving force from the electric motor.

In the case of the gear box 300-1 of the first embodiment and the gear box 300-2 of the second embodiment, the rotation directions of the second bevel gears 306 between adjacent gear boxes are opposite to each other. Accordingly, when the present invention is applied to the desk 1000 as shown in FIG. 1, the screw bolts and screw nuts of the adjacent gear boxes must be different from each other. In other words, if screw type of screw bolt and screw nut of one gear box is left-handed type, screw type of screw bolt and screw nut of the other gear box should be right screw type.

Fig. 14 shows a third embodiment of a gear box according to the present invention.

Referring to FIG. 14, it can be seen that the gear box 300-3 is configured as a worm gear. The worm gear 350 is connected to the motor 400 or the connecting rod 704 and the worm wheel 352 is connected to the screw bolts 506 to the second cylinder.

When the gear box 300-3 is used, the direction of rotation of the worm wheel 352 in the adjacent gearboxes 300-3 is the same. Therefore, the screw bolt 506 of the same type can be used as compared with the case of using the gear box 300-1 of the first embodiment and the gear box 300-2 of the second embodiment.

The connecting box 600 may be used to transmit the driving force between the two gear boxes 300.

15 shows the appearance of the connecting box.

Referring to FIG. 15, it can be seen that the connecting box 600 is used for connecting the two connecting rods 702 and 704. The connecting rods 702 and 704 are inserted into the connecting gear inserting portions 304d and 308d of the bevel gears 304 and 308 of the gear box 300 to drive the first bevel gear 304 or the third bevel gear 308 So that it has a hexagonal cross section in order to effectively transmit the driving force and secure the coupling with the bevel gears 304 and 308. [ Therefore, the connecting rod receiving portions 600a and 600c of the connecting box 600 also have a hexagonal cross-section.

16 shows a detailed configuration of the connecting box.

Referring to FIG. 16, the connecting box 600 includes a housing 602, connecting rod receiving portions 604 and 606, and an elastic spring 608. The housing 602 is tubular and accommodates connecting rod receiving portions 604 and 606 and an elastic spring 608 therein. One of the two connecting rod receiving portions 604 and 606 is fixed and the other is sliding inside the housing 602. [ An elastic spring 608 is provided between the connecting rod receiving portions 604 and 606.

17 shows the connection state of the connecting box and the gear box.

18 shows another embodiment of a height adjustable desk according to the present invention.

18, a desk 2000 according to another embodiment of the present invention includes a rectangular upper plate 2010, a leg 200, a gear box 300, a connecting box 600, connecting rods 704 to 712, . The gear box 300a receiving the driving force from the electric motor 400 among the gear boxes 300 uses the gear box 300-2 according to the second embodiment and the others 300b to 300d are used in the first embodiment The gear box 300-1 according to the first embodiment is used.

One gear box 300 is installed at four corners of the upper plate 2010 and each of the gear boxes 300 is connected through connecting rods 704 to 712. That is, The gears 300b and 300c disposed at the closed side edges of these should be arranged such that the connecting rods 706 and 708 and 708 and 710 intersect at right angles to each other, It can be seen that the gear box 300-1 according to the first embodiment of the present invention should be a gear box 300-1 located on the open side, The gear box 300-1 according to the second embodiment or the gear box 300-2 according to the second embodiment.

The connecting box 600 is used to connect the connecting rods 704 to 712. However, it may be omitted if the width of the top plate 2010 is short.

When the connecting rod 702 attached to the electric motor 400 is connected to the first gear box 300-2 and the electric motor 400 is driven, (300a to 300d) are driven to change the heights of the legs (200) together. Accordingly, the height of the upper plate 2010 is adjusted.

Here, the rotational directions of the first bevel gear 304 and the third bevel gear 308 are different from each other due to the characteristics of the gearboxes 300-1 and 300-2 composed of bevel gears. Thus, between the two gearboxes, for example, the gearboxes located between the first gearbox 300a and the third gearbox 300c, for example the legs coupled to the second gearboxes 300b and 300d, The rotational direction of the bevel gear 306 is opposite. To solve this, the legs located between the two legs should be configured to correspond to the opposite direction of rotation. For example, if the leg 200a connected to the first gear box 300a is configured so as to rise with respect to the leftward rotation, the leg 200b connected to the second gear box 300b will rotate in the right direction It should be configured to rise with respect to rotation. To this end, the first leg 200a may be configured to use a screw bolt 506 of the left screw type and the second leg 200b may be configured to use a right screw screw bolt 506.

Figure 19 shows another embodiment of a desk according to the present invention. 19 shows that the legs 200 on the right and left of the desk 1000 are folded so as to be folded toward the center.

19, when the leg 200 is folded, after the connecting box 600 and the connecting rods 704 and 706 are removed, the leg 200 is folded. First, by holding the connecting rod 704 and pushing it toward the connecting box 600, the connecting rod 704 is pushed into the connecting box 600 and separated from the opposite gear box 300 side. After the connecting rods 704 and 706 and the connecting box 600 are removed in this manner, the screws of the outer flange 302b of the flanges of the gear box 300 are loosened and the legs are folded toward the center.

20 shows an example of the hinge provided in the gear box. As shown in FIG. 22, a flange 302b which can be fixed by screws is provided outside the housing 302 of the gear box 300, and a hinge 302c is provided on the inside thereof. Here, the flange 302b may be selectively applied.

The gear box 300 and the leg 200 can be folded with respect to the upper plate 100 by using the hinge 302c.

In the example shown in Fig. 20, the desk 1000 can be configured to be assembled, which is easy to assemble and move.

100 ... top plate 200 ... leg
300 ... Gearbox

Claims

On a height adjustable desk,
Top plate;
A height adjustable leg supporting the top plate at both sides of the top plate;
And a connecting rod connecting the legs,
Here, the height-adjustable leg
A gear box 300 to which the connecting rod is connected,
A third cylinder 206 rotated by the gear box 300;
A screw nut 208 fixed to a lower portion of the third cylinder 206;
A second cylinder (204) receiving the third cylinder (206) and having an open top; And
A screw bolt (210) fixed to the inner bottom of the second cylinder (204) and extending into the interior of the third cylinder (206) through the screw nut (208);
/ RTI >
Wherein said gear box includes a worm gear and a worm wheel, said worm wheel being connected to said third cylinder (206).

The method according to claim 1,
Further comprising a first cylinder (202) fixed to the gear box (300) and inserted into the second cylinder (204) while accommodating the third cylinder (206) desk.

3. The method of claim 2,
Further comprising sliding patches (212, 214) installed between the contact surfaces of the first cylinder (202) and the second cylinder (204).

The method according to claim 1,
And a pedestal (210) for supporting the second cylinder (204).

The method according to claim 1,
Further comprising a gear box housing (302) having the gear box (300) received therein and having flanges (302s, 302b) for fixing the gear box (300) on the upper portion thereof.

The method according to claim 1,
Further comprising a gear box housing accommodating the gear box 300 and having a hinge 302c formed on an upper portion of the gear box 300 so that the gear box 300 and the leg 200 can be folded. Adjustable desk.

The method according to claim 1,
And a connecting box connecting the connecting rods between the gear boxes.

8. The method of claim 7,
The connecting box
A tubular housing;
A connecting rod receiving portion provided at both ends of the housing;
An elastic spring installed between the connecting rod accommodating portions;
/ RTI >
Wherein the connecting rod receiving portion of one side is fixed to the housing and the connecting rod receiving portion of the other side is slidable with respect to the housing.

Top plate;
A height adjustable leg supporting the top plate at both sides of the top plate;
And a connecting rod connecting the legs,
The height-adjustable leg
A gear box 300 to which the connecting rod is connected;
A screw bolt 506 rotated by the gear box 300;
A second cylinder 504 that receives the screw bolt 506 and opens at an upper portion thereof;
A screw nut 508 fixed to the upper end of the second cylinder 504 and screwed to the screw bolt 506; And
A third cylinder (516) receiving the second cylinder (504) and having an open top;
/ RTI >
Said gear box comprising a worm gear and a worm wheel, said worm wheel being connected to said screw bolt (506).

10. The method of claim 9,
Further comprising a first cylinder (502) fixed to the gear box (300) and inserted into the second cylinder (504) while accommodating the screw bolt (506) .

11. The method of claim 10,
And a height adjusting screw (510) installed at a lower portion of the third cylinder (504).

10. The method of claim 9,
Further comprising sliding patches (512, 514) installed between the contact surfaces of the first cylinder (502) and the second cylinder (504).

10. The method of claim 9,
Further comprising a gear box housing (302) having a flange (302a) for receiving the gear box (300) and fixing the gear box (300) on an upper portion thereof.

10. The method of claim 9,
And a connecting box connecting the connecting rods between the gear boxes.

15. The method of claim 14,
The connecting box
A tubular housing;
A connecting rod receiving portion provided at both ends of the housing;
An elastic spring installed between the connecting rod accommodating portions;
/ RTI >
Wherein the connecting rod receiving portion of one side is fixed to the housing and the connecting rod receiving portion of the other side is slidable with respect to the housing.

16. The method of claim 15,
Wherein the connecting rod receiving portion has a hexagonal section.

In a connecting box for connecting two connecting rods,
A tubular housing;
A connecting rod receiving portion provided at both ends of the housing;
An elastic spring installed between the connecting rod accommodating portions;
/ RTI >
Wherein the connecting rod receiving portion of one side is fixed to the housing and the connecting rod receiving portion of the other side is slidable with respect to the housing.

18. The method of claim 17,
Wherein the connecting rod receiving portion has a hexagonal cross section.