CN210988938U

CN210988938U - Desk with adjustable height

Info

Publication number: CN210988938U
Application number: CN201922004011.8U
Authority: CN
Inventors: 邹剑青
Original assignee: Liangjiang Town Central Primary School Lingui District Guilin
Current assignee: Liangjiang Town Central Primary School Lingui District Guilin
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-07-14
Anticipated expiration: 2029-11-19

Abstract

The utility model relates to a height-adjustable desk, which comprises a desk body with support legs, wherein the lower ends of the support legs are sequentially provided with a bearing, a rotary cylinder and a screw rod from top to bottom, the lower ends of the support legs are fixed on the inner ring of the bearing, and the upper ends of the rotary cylinders are fixed at the bottom of the outer ring of the bearing; the upper end of the screw rod is in threaded connection with the inside of the rotary cylinder, and the lower end of the screw rod extends downwards to the outside of the bearing and supports the ground. The utility model has the advantages that: this desk when height-adjusting, the rotatory section of thick bamboo reciprocates along the screw rod behind the manual rotatory section of thick bamboo of rotating, and on the one hand the screw rod can not rotate with ground friction, and on the other hand stabilizer blade can not rotate along with rotatory section of thick bamboo, but the stabilizer blade can reciprocate along with rotatory section of thick bamboo to can realize the regulation of desk height fast, and need not many people and operate and can accomplish.

Description

Desk with adjustable height

Technical Field

The utility model relates to a teaching field, concretely relates to height-adjustable's desk.

Background

The desk is one of the essential tools in the teaching process, and the height of the desk required by students with different ages or different statures can be different. As shown in figure 1, in the desk with adjustable height, an external thread is arranged on a supporting leg 1 of the desk, a rotary cylinder 3 for supporting the ground is sleeved at the lower end of the supporting leg 1 through the thread, and when the height of the desk needs to be adjusted, the rotary cylinder 3 is manually rotated relative to the supporting leg 1, so that the rotary cylinder 3 moves up and down along the supporting leg 1, and the height of the desk is adjusted. Above-mentioned regulation mode, rubs with ground during the rotary drum 3, therefore rotary drum 3 has certain difficulty, need lift up the desk and make rotary drum 3 rotate rotary drum 3 again behind the ground not contact many times to lead to the altitude mixture control of desk to need many people to cooperate jointly just can accomplish.

SUMMERY OF THE UTILITY MODEL

In summary, in order to overcome the defects of the prior art, the utility model aims to solve the technical problem of providing a desk with adjustable height.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a desk with adjustable height comprises a desk body with support legs, wherein bearings, a rotary cylinder and a screw rod are sequentially arranged at the lower ends of the support legs from top to bottom, the lower ends of the support legs are fixed on an inner ring of the bearings, and the upper ends of the rotary cylinder are fixed at the bottom of an outer ring of the bearings; the upper end of the screw rod is in threaded connection with the inside of the rotary cylinder, and the lower end of the screw rod extends downwards to the outside of the bearing and supports the ground.

The utility model has the advantages that: this desk when height-adjusting, the rotatory section of thick bamboo reciprocates along the screw rod behind the manual rotatory section of thick bamboo of rotating, and on the one hand the screw rod can not rotate with ground friction, and on the other hand stabilizer blade can not rotate along with rotatory section of thick bamboo, but the stabilizer blade can reciprocate along with rotatory section of thick bamboo to can realize the regulation of desk height fast, and need not many people and operate and can accomplish.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

furthermore, a limiting mechanism for preventing the rotary cylinder from being separated from the screw rod when the rotary cylinder rotates is further arranged in the screw rod.

Furthermore, the limiting mechanism comprises a connecting rod and a stop lever; a sliding groove is vertically arranged in the screw rod, and a through hole for communicating the sliding groove with the outside is arranged at the top of the screw rod; the upper end of the connecting rod is fixedly connected with the lower end of the supporting leg, and the lower end of the connecting rod extends downwards in the rotary cylinder and then enters the sliding groove through the through hole; the stop lever is horizontally positioned in the sliding groove in a vertically sliding manner, the middle part of the stop lever is fixedly connected with the lower end of the connecting rod, and the length of the stop lever is greater than the width of the through hole so as to limit the stop lever to vertically slide in the sliding groove.

The beneficial effect of adopting the further scheme is that: prevent the continuous transmission of the rotary drum from causing the separation of the rotary drum and the screw.

Further, the top and the bottom of screw rod all be equipped with the exhaust hole of spout intercommunication.

The beneficial effect of adopting the further scheme is that: prevent the air in the sliding groove from blocking the stop lever to slide up and down.

Further, the outer side wall of the rotating cylinder is annularly provided with a groove for increasing friction force.

The beneficial effect of adopting the further scheme is that: the rotary cylinder is convenient to rotate manually.

Drawings

FIG. 1 is a schematic view of a prior art desk;

FIG. 2 is a schematic view of the present invention;

FIG. 3 is an enlarged view A of FIG. 1;

fig. 4 is a top view of the spin basket.

In the drawings, the components represented by the respective reference numerals are listed below:

1. stabilizer blade, 2, bearing, 3, rotatory section of thick bamboo, 4, screw rod, 5, connecting rod, 6, pin, 7, spout, 8, exhaust hole.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 2 and 3, the desk with the adjustable height comprises a desk body with a support leg 1, wherein a bearing 2, a rotary cylinder 3 and a screw 4 are sequentially arranged at the lower end of the support leg 1 from top to bottom, the lower end of the support leg 1 is fixed on an inner ring of the bearing 2, and the upper end of the rotary cylinder 3 is fixed at the bottom of an outer ring of the bearing 2. The upper end of the screw rod 4 is connected with the inside of the rotary cylinder 3 in a threaded manner, and the lower end of the screw rod extends downwards to the outside of the bearing 2 and supports the ground. When the height of desk needs to be adjusted, hold rotatory section of thick bamboo 3 and rotate rotatory section of thick bamboo 3, rotatory section of thick bamboo 3 can reciprocate along screw rod 4 after being changeed to screw rod 4 can not rotate with ground friction, in addition because the effect stabilizer blade 1 of bearing 2 can not rotate along with rotatory section of thick bamboo 3 yet, but stabilizer blade 1 can reciprocate along with rotatory section of thick bamboo 3, thereby can realize the regulation of desk height fast, and need not many people and operate and can accomplish. As shown in fig. 4, the outer sidewall of the rotary cylinder 3 is annularly provided with a groove 9 for increasing friction force so as to manually rotate the rotary cylinder 3.

And a limiting mechanism for preventing the rotary cylinder 3 from being separated from the screw rod 4 when the rotary cylinder 3 is rotated is also arranged in the screw rod 4. The limiting mechanism comprises a connecting rod 5 and a stop lever 6. A sliding groove 7 is vertically arranged in the screw rod 4, and a through hole for communicating the sliding groove 7 with the outside is arranged at the top of the screw rod 4. The upper end of the connecting rod 5 is fixedly connected with the lower end of the supporting leg 1, and the lower end of the connecting rod extends downwards in the rotary cylinder 3 and then enters the sliding groove 7 through the through hole. The stop lever 6 is horizontally and slidably up and down in the chute 7, the middle part of the stop lever is fixedly connected with the lower end of the connecting rod 5, and the length of the stop lever 6 is greater than the width of the through hole so as to limit the stop lever 6 to slide up and down in the chute 7. When the desk is adjusted in height, the distance between the support legs 1 and the screw rods 4 can be changed, and meanwhile, the stop rods 6 can slide up and down in the sliding grooves 7. When the distance between the supporting leg 1 and the screw rod 4 reaches the maximum, namely the desk is highest, the stop lever 6 reaches the top of the chute 7 and cannot continuously slide upwards, and the rotary cylinder 3 cannot be rotated at the moment; when the distance between the supporting leg 1 and the screw rod 4 reaches the minimum, namely the desk is the lowest, the stop lever 6 reaches the bottom of the sliding groove 7 and cannot continuously slide downwards, and at the moment, the rotary cylinder 3 cannot be rotated, so that the separation of the rotary cylinder 3 and the screw rod 4 is effectively avoided. And the top and the bottom of the screw rod 4 are both provided with exhaust holes 8 communicated with the sliding grooves 7. If not setting up exhaust hole 8, the air in the spout 7 can be compressed to pin 6 when spout 7 slides from top to bottom, can form certain atmospheric pressure after the air is compressed, and this atmospheric pressure can hinder pin 6's upper and lower slip, leads to needing great external force just can rotate rotary drum 3. Therefore, after the exhaust holes 8 are formed, the stop lever 6 compresses air in the sliding groove 7 when the sliding groove 7 slides up and down, and compressed air is discharged to the outside of the sliding groove 7 through the corresponding exhaust holes 8, so that the stop lever 6 is prevented from sliding up and down by air pressure, and the rotary cylinder 3 is easy to rotate.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A desk with adjustable height comprises a desk body with support legs (1), and is characterized in that a bearing (2), a rotary cylinder (3) and a screw (4) are sequentially arranged at the lower ends of the support legs (1) from top to bottom, the lower ends of the support legs (1) are fixed on an inner ring of the bearing (2), and the upper ends of the rotary cylinders (3) are fixed at the bottom of an outer ring of the bearing (2); the upper end of the screw rod (4) is in threaded connection with the inside of the rotary cylinder (3), and the lower end of the screw rod extends downwards to the outside of the bearing (2) and supports the ground.

2. The desk with adjustable height as claimed in claim 1, wherein a limiting mechanism is further provided inside the screw (4) for preventing the rotary cylinder (3) from being disengaged from the screw (4) when the rotary cylinder (3) is rotated.

3. The desk with adjustable height of claim 2, wherein the limiting mechanism comprises a connecting rod (5) and a stop rod (6); a sliding groove (7) is vertically arranged in the screw rod (4), and a through hole for communicating the sliding groove (7) with the outside is arranged at the top of the screw rod (4); the upper end of the connecting rod (5) is fixedly connected with the lower end of the support leg (1), and the lower end of the connecting rod extends downwards in the rotary cylinder (3) and then enters the sliding groove (7) through the through hole; the stop lever (6) is horizontally positioned in the sliding groove (7) in a manner of sliding up and down, the middle part of the stop lever is fixedly connected with the lower end of the connecting rod (5), and the length of the stop lever (6) is greater than the width of the through hole so as to limit the stop lever (6) to slide up and down in the sliding groove (7).

4. Height-adjustable desk according to claim 3, characterized in that the top and bottom of the screw (4) are provided with air vents (8) communicating with the chutes (7).

5. Height adjustable desk according to any of claims 1 to 4, characterized in that the outer side wall of the rotary cylinder (3) is annularly distributed with grooves (9) for increasing friction.