CN110840086A

CN110840086A - Press lever type lifting adjusting mechanism of student desk and chair

Info

Publication number: CN110840086A
Application number: CN201911122062.9A
Authority: CN
Inventors: 杨益民
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-02-28

Abstract

A pressing lever type lifting adjusting mechanism of a student desk and chair comprises an inner sleeve and an outer sleeve, wherein the inner sleeve is inserted into the outer sleeve, more than two slots are formed in the outer wall of one side or two sides of the inner sleeve, the slots are one-way locking slots or two-way locking slots, the upper end of each one-way locking slot is a straight blocking surface, the lower end of each one-way locking slot is an inclined guide surface, the upper end and the lower end of each two-way locking slot are respectively a straight blocking surface, one side or two side walls of the outer sleeve corresponding to the slots are provided with a pressing lever locking device, each pressing lever locking device comprises a mounting seat and the outer sleeve which are fixed, the opening part of the mounting seat is provided with a fixing panel, a lever is arranged in the mounting seat and is rotatably connected with the mounting seat through a rotating shaft, one end of the lever is provided with a locking plug, and/or the other end of the lever is provided with a spring on the same side of the locking plug.

Description

Press lever type lifting adjusting mechanism of student desk and chair

Technical Field

The invention relates to a student desk and chair, in particular to a pressing lever type lifting adjusting mechanism of the student desk and chair.

Background

The specifications of desks and chairs in primary and secondary schools are generally more uniform, but the height difference of the students is larger, in order to meet the requirements of students with different heights, table and chair legs capable of adjusting the heights of the table and the chair are developed in recent years, the traditional table and chair leg adjustment is that connecting plates are arranged at two sides of the table and the chair, a plurality of adjusting holes with different heights are formed on the connecting plates, fixing holes are arranged on the table and chair legs, two sides of the table and chair legs respectively pass through the adjusting holes and the fixing holes through two studs and are fixed through nuts, the lifting of the table and chair legs corresponds to the adjusting holes with different heights through the adjusting fixing holes to achieve the adjustment of the lifting, this structure all will be earlier twisted off stud and nut when adjusting at every turn, again with the fixed orifices corresponding with the regulation hole of required height, screws up stud and nut at last, and the operation is very troublesome, hard, and the governing speed is slow, and operates alone inconveniently. Therefore, a Chinese utility model patent 201721863590.6 is applied for, the patent name is 'a desk capable of adjusting height rapidly', which comprises a desk surface, a desk box, a bracket, a latch, desk legs and a lifting mechanism; the method is characterized in that: the desk box is installed at the bottom of the school desk, the four supports are installed at the bottom of the school desk, a row of vertical and evenly-arranged clamping teeth are arranged on each support, each support penetrates through a desk leg and enters a cavity in the desk leg, a lifting mechanism is installed on the inner wall of the cavity and is in contact with the clamping teeth, a second magnet is arranged on the cavity, the desk leg is fixedly connected with the I-shaped beam, and a hook is arranged on the desk leg. The structure has the following disadvantages: the support is provided with a row of clamping teeth which are vertically and uniformly arranged, and the clamping teeth are in a convex state, so that a large gap is formed between the support and the desk legs, the support and the desk legs are not tightly matched, the support and the desk are easy to shake, and the stability is poor; two, four supports are installed at the bottom of the school desk, each support penetrates through the desk legs and enters a cavity in the desk legs, a lifting mechanism is installed on the inner wall of the cavity, namely the four supports, the four corresponding desk legs and the lifting mechanism are all arranged, when people operate the lifting mechanism (particularly when the desk is lifted), two people operate the lifting mechanism, and when one person lifts the desk, three people are needed to complete the operation, so that the operation is troublesome; and thirdly, the lifting mechanism is arranged on the inner wall of the cavity, and the handle of the lifting mechanism is required to be clockwise shifted during operation, but the lifting mechanism is arranged in the cavity, and people cannot stretch hands into the cavity to shift the handle of the lifting mechanism, so that the scheme cannot be realized at all.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a pressing lever type lifting adjusting mechanism of a student desk and chair, which has the advantages of simple structure, tight fit between an inner sleeve and an outer sleeve, convenient lifting operation, stable lifting and reliability.

The invention relates to a technical scheme of a pressing lever type lifting adjusting mechanism of student desk and chair, which comprises the following steps: the desk box or chair seat plate comprises an inner sleeve and an outer sleeve, wherein the upper end of the inner sleeve is connected with a desk box or a chair seat plate, the inner sleeve is inserted into the outer sleeve, more than two slots are formed in the outer wall of one side or two sides of the inner sleeve, the slots are one-way locking slots or two-way locking slots, the upper end of each one-way locking slot is a straight retaining surface, the lower end of each one-way locking slot is an inclined guide surface, the upper end and the lower end of each two-way locking slot are straight retaining surfaces, a pressing lever locking device is arranged on one side or two side walls of the outer sleeve corresponding to the slots, each pressing lever locking device comprises a mounting seat, the mounting seats are fixed with the outer sleeve, a fixing panel is arranged at the opening parts of the mounting seats, the fixing panel is fixed with the mounting seats, levers are arranged in the mounting seats, the levers are, the other end of the lever is provided with a button, the button penetrates through the fixing panel, one end of the lever is positioned on the back surface of the locking plug and is provided with a spring, and/or the other end of the lever is positioned on the same edge of the locking plug and is provided with a spring.

The invention discloses a pressing lever type lifting adjusting mechanism of a student desk and chair, wherein table legs or chair legs are formed by outer sleeves and inner sleeves made of plastic or metal materials, and are arranged below two ends of a desk box when used on a desk, namely two table legs are arranged below the desk box; the slot on the side wall of the inner sleeve can be divided into two forms, one is a one-way locking slot, the upper end of the slot is a straight baffle surface, the lower end of the slot is an inclined guide surface, the other is a two-way locking slot, the upper end and the lower end of the slot are both straight baffle surfaces, if the one-way locking slot is adopted, when the desk or the chair is lifted and adjusted, people only need to pull the desk box or the chair seat plate upwards by hands, the desk box or the chair seat plate drives the inner sleeve to move upwards, the inclined guide surface at the lower end of the one-way locking slot on the side wall of the inner sleeve is matched with the locking plug of the lever, the locking plug swings outwards under the guiding action of the inclined guide surface, so that the locking plug can be directly separated from the one-way locking slot, when the desk box or the chair seat plate is stopped to be pulled upwards, the lever drives the locking plug to be inserted into the, the locking plug is contacted with the straight baffle surface to limit the one-way locking slot and the inner sleeve, so that the desk box or the chair seat plate cannot fall down; when the desk or the chair is required to be descended and adjusted, people need to press a button (the button can be integrally manufactured with the lever or manufactured in a split way) with fingers, the button drives the lower part of the lever to swing inwards, the upper part of the lever swings outwards in a reverse direction, so that a locking plug at the upper part of the lever is outwards separated from a straight blocking surface of a one-way locking slot, the desk or the chair can be descended at the moment, after the desk or the chair is adjusted in place, the fingers loosen the button, a spring drives the lever to reset under the action of restoring force, a locking plug on the lever is inwards inserted into the one-way locking slot at the corresponding position, the locking plug is matched with the straight blocking surface at the upper end of the one-way locking slot to limit an inner sleeve, and; if the bidirectional locking slot is adopted, when the desk or the chair is adjusted to ascend or descend, a user needs to press the button by fingers, the button drives the lower portion of the lever to swing inwards, the upper portion of the lever swings outwards in a reverse direction, the locking plug at the upper portion of the lever is enabled to be separated from the bidirectional locking slot outwards, the desk or the chair can be adjusted up and down at the moment, after the desk or the chair is adjusted in place, the fingers loosen the button, the spring drives the lever to reset under the action of restoring force, the locking plug on the lever is inserted inwards into the bidirectional locking slot at the corresponding position, the locking plug is matched with the bidirectional locking slot to limit the inner sleeve, and the desk box or the chair seat plate cannot fall down. According to the scheme, the pressing lever type lifting adjusting mechanism for the student desk and chair is characterized in that more than two slots are formed in one side or two outer side walls of an inner sleeve, and the slots are located on the wall of the inner sleeve and do not protrude out of the inner sleeve, so that the gap between the inner sleeve and the outer sleeve is smaller, the inner sleeve and the outer sleeve are matched closely and comfortably, and the assembly is reliable; secondly, the lever is pressed by a button to drive the lever to swing, so that the locking plug on the lever swings reversely to be separated from the slot of the inner sleeve, the structure is simple, the operation is convenient, the manufacture is easy, and the production cost is reduced; and thirdly, the outer sleeve and the inner sleeve form table legs or chair legs which are positioned below two sides of a table box or a chair seat plate, namely, the two table legs are arranged below the table box, the two chair legs are arranged below the chair seat plate, one side or two side outer walls of each table leg or chair leg are provided with a pressing lever type lifting adjusting mechanism, and compared with the prior art, the lifting mechanism is arranged on cavities in four table legs.

The invention relates to a pressing lever type lifting adjusting mechanism of a student desk and chair, wherein a rotating shaft groove is formed in the inner wall of a mounting seat, rotating shafts are formed on two sides of a lever, and the rotating shafts are matched with the rotating shaft groove. The lever and the rotating shaft can be integrally manufactured and formed or manufactured in a split mode, when the lever and the rotating shaft are integrally manufactured and formed, a rotating shaft groove is formed in the inner wall of the mounting seat, the lever is matched with the rotating shaft groove in a rotating mode through the rotating shaft, if the lever and the rotating shaft are manufactured in a split mode, shaft holes need to be formed in the side wall of the mounting seat and the lever, the lever is placed into the mounting seat, and the rotating shaft penetrates through the shaft holes of the mounting seat and the lever to connect the mounting seat and the lever. The lever is provided with a positioning groove or a positioning column, and the spring is matched with the positioning groove or the positioning column. The lever is provided with a positioning groove, one end of the spring is clamped into the positioning groove, or a positioning column is adopted, and one end of the spring is sleeved on the positioning column to position the spring, so that the spring cannot slip off and is reliably assembled. The inner wall of the mounting seat is provided with limiting ribs which are contacted with the outer walls of two sides of the lever. The limiting ribs limit the two sides of the lever, so that the lever can swing accurately without deflection. The inner wall of the fixed panel is provided with a positioning rib which is matched with the inner wall of the mounting seat. And with the positioning ribs, the positioning is accurate when the fixing panel is assembled with the mounting seat.

The invention relates to another technical scheme of a pressing lever type lifting adjusting mechanism of student desk and chair, which comprises the following steps: including interior sleeve pipe and outer tube, desk case or chair board are connected to interior sheathed tube upper end, and interior sleeve pipe inserts in the outer tube, the jack more than two is made to interior sheathed tube one side or both sides outer wall system, and the lever locking device is pressed in the one side or both sides lateral wall setting that outer tube and jack are corresponding, press lever locking device include the mount pad, the mount pad is fixed mutually with the outer tube, set up the lever in the mount pad, the lever is through pivot and mount pad swivelling joint, has locking plug in one end system of lever, locking plug passes the jack cooperation of outer tube and interior sleeve pipe lateral wall, another lateral wall of lever sets up the button, the system has the perforation on the mount pad, the button passes the perforation, sets up the spring on one end of lever is located locking plug's the back, and/or another end of lever is located locking plug's.

The invention discloses another pressing lever type lifting adjusting mechanism for student desk and chair, which comprises table legs or chair legs consisting of outer sleeves and inner sleeves made of plastic or metal materials, wherein the table legs or the chair legs are arranged below two ends of a desk box when the pressing lever type lifting adjusting mechanism is used on a desk, namely two table legs are arranged below the desk box; wherein, more than two jacks are arranged on the outer wall of one side or two sides of the inner sleeve, a pressing lever locking device is arranged on the side wall of one side or two sides of the outer sleeve corresponding to the jacks, a mounting seat of the pressing lever locking device can be manufactured and molded with the outer sleeve separately, the mounting seat and the outer sleeve are fixed by a fastener, an opening is arranged on one side of the outer sleeve of the mounting seat, a lever is arranged in the opening, the lever is rotatably connected with the mounting seat by a rotating shaft, one end of the lever is provided with a locking plug, the locking plug passes through the outer sleeve to be matched with the jacks on the side wall of the inner sleeve (the jacks can be square holes or round holes, and the corresponding locking plug is a square locking plug or a round locking plug), when the desk or the chair is adjusted to ascend or descend, the button is pressed by fingers, the button drives the lower part, the locking plug at the upper part of the lever is enabled to be outwards separated from the jack, the desk or the chair can be adjusted up and down, after the adjustment is in place, the button is loosened by fingers, the spring drives the lever to reset under the action of restoring force, the locking plug on the lever is inwards inserted into the jack at the corresponding position, the locking plug is matched with the jack to limit the inner sleeve, and the desk box or the chair seat plate cannot fall down. According to the scheme, the pressing lever type lifting adjusting mechanism for the student desk and chair is characterized in that more than two insertion holes are formed in one side or two outer side walls of an inner sleeve, the insertion holes are located on the pipe wall of the inner sleeve and do not protrude out of the inner sleeve, so that the gap between the inner sleeve and an outer sleeve is smaller, the inner sleeve and the outer sleeve are matched closely and comfortably, and the assembly is reliable; secondly, the lever is pressed by adopting a button to drive the lever to swing, so that the locking plug on the lever swings reversely to be separated from the jack of the inner sleeve, the structure is simple, the operation is convenient, the manufacture is easy, and the production cost is reduced; and thirdly, the outer sleeve and the inner sleeve form table legs or chair legs which are positioned below two sides of a table box or a chair seat plate, namely, the two table legs are arranged below the table box, the two chair legs are arranged below the chair seat plate, one side or two side outer walls of each table leg or chair leg are provided with a pressing lever type lifting adjusting mechanism, and compared with the prior art, the lifting mechanism is arranged on cavities in four table legs.

The invention relates to a pressing lever type lifting adjusting mechanism of a student desk and chair, wherein a rotating shaft groove is formed in the inner wall of a mounting seat, rotating shafts are formed on two sides of a lever, and the rotating shafts are matched with the rotating shaft groove. The rotating shaft groove is provided with a limiting locking plate, the limiting locking plate is in limiting fit with the rotating shaft of the lever, and two ends of the limiting locking plate are fixed with the mounting seat through fasteners. The lever can be made with the pivot integrated into one piece, perhaps the components of a whole that can function independently is made, and during the integrated into one piece, system has the pivot recess at the mount pad inner wall, and the lever is through pivot and pivot recess rotation fit, and spacing locking plate is spacing to the pivot to the rethread, if the lever is made with the pivot components of a whole that can function independently, need open shaft hole in mount pad lateral wall and lever, put into the mount pad with the lever, pass the shaft hole of mount pad and lever by the pivot and connect the two, make it can reach rotation fit. The lower end of the locking plug is an inclined plane or a straight plane, and the inclined plane or the straight plane is matched with the jack. When in use at ordinary times, the locking plug is in the state of being inserted into the jack of the inner sleeve, the lower end of the locking plug is made into an inclined plane, when the desk or the chair is lifted and adjusted, people only need to pull the desk box or the chair seat plate upwards by hands, the desk box or the chair seat plate drives the inner sleeve to move upwards, the jack of the inner sleeve is contacted with the inclined plane at the lower end of the locking plug, the jack pushes the inclined plane upwards, the upper part of the lever automatically swings outwards under the guiding action of the inclined plane, the locking plug of the lever automatically separates from the jack outwards, when the locking plug corresponds to the next jack, the spring pushes the lever to reset under the action of the elastic force, so that the locking plug is inserted into the jack again, the lower end of the locking plug is made into a straight surface, when the desk or the chair is lifted or lowered, the button is pressed by hands, the lever is driven to swing through the button, and the lifting adjustment can be carried out only after the locking plug on the lever is outwards separated from the jack.

Drawings

FIG. 1 is a perspective view of a desk leg of a student desk with a push lever type lifting adjusting mechanism;

FIG. 2 is a schematic structural view of a push lever type lift adjustment mechanism with a one-way locking slot;

FIG. 3 is a schematic structural view of a push lever type lift adjustment mechanism with a bi-directional locking slot;

FIG. 4 is a schematic structural view of a pressing lever locking device arranged on the outer walls of two sides of an outer sleeve of the pressing lever type lifting adjusting mechanism;

FIG. 5 is a perspective view of the outer sleeve with a mounting socket formed thereon;

FIG. 6 is a perspective view of the lever;

FIG. 7 is a perspective view of a retainer panel;

FIG. 8 is a schematic structural view of another embodiment of a pressing lever type lifting adjusting mechanism of a student desk and chair of the present invention;

FIG. 9 is a perspective view of the mounting seat, lever and limiting locking plate in a mated state;

FIG. 10 is a perspective view of the mount, lever and locking tab in an exploded position;

FIG. 11 is a schematic view of the structure of the lever with the lower end of the locking plug being beveled;

fig. 12 is a schematic view of a structure in which the lower end of the locking plug of the lever is a straight surface.

Detailed Description

The invention relates to a pressing lever type lifting adjusting mechanism of student desk and chair, as shown in figure 1-figure 12, comprising an inner sleeve 1 and an outer sleeve 2, wherein the upper end of the inner sleeve is connected with a desk box 20 or a chair seat plate, the inner sleeve is inserted into the outer sleeve, more than two slots are arranged on one side or two sides of the outer sleeve 1, the slots are unidirectional locking slots 4 or bidirectional locking slots 5, the upper end of the unidirectional locking slot 4 is a straight baffle surface, the lower end of the unidirectional locking slot 4 is an inclined guide surface, the upper end and the lower end of the bidirectional locking slot 5 are straight baffle surfaces, a pressing lever locking device is arranged on one side or two side walls of the outer sleeve 2 corresponding to the slots, the pressing lever locking device comprises a mounting seat 6, the mounting seat is fixed with the outer sleeve 2, a fixed panel 7 is arranged at the mouth of the mounting seat, the fixed panel is fixed with the mounting seat, a, the lever is rotatably connected with the mounting base through a rotating shaft 9, one end of the lever is provided with a locking plug 10, the locking plug penetrates through the outer sleeve 2 to be matched with the slot on the side wall of the inner sleeve 1, the side wall of the other end of the lever is provided with a button 11, the button penetrates through the fixing panel 7, one end of the lever 8, which is positioned on the back of the locking plug 10, is provided with a spring 12, and/or the other end of the lever 8, which is positioned on the same side of the locking plug 10, is provided with.

The invention discloses a pressing lever type lifting adjusting mechanism of a student desk and chair, wherein table legs or chair legs are formed by an outer sleeve 2 and an inner sleeve 1 which are made of plastic or metal materials, the pressing lever type lifting adjusting mechanism is arranged below two ends of a desk box 20 when the pressing lever type lifting adjusting mechanism is used on a desk, namely two table legs are arranged below the desk box, and the pressing lever type lifting adjusting mechanism is arranged on the outer wall of one side or two sides of each table leg or chair leg; the slot on the side wall of the inner sleeve 1 can be divided into two forms, one is a one-way locking slot 4, the upper end is a straight baffle surface, the lower end is an inclined guide surface, the other is a two-way locking slot 5, the upper end and the lower end are both straight baffle surfaces, if the one-way locking slot 4 is adopted, when the desk or the chair is lifted and adjusted, people only need to pull the desk box 20 or the chair seat plate upwards by hands, the desk box 20 or the chair seat plate drives the inner sleeve 1 to move upwards, the inclined guide surface at the lower end of the one-way locking slot 4 on the side wall of the inner sleeve is matched with the locking plug 10 of the lever 8, the locking plug swings outwards under the guiding action of the inclined guide surface, so that the locking plug can be directly separated from the one-way locking slot 4, when the desk box 20 or the chair seat plate is stopped to be pulled upwards, the lever 8 drives the locking plug 10 to be inserted into the one-way locking slot 4 at the corresponding position under the, the locking plug 10 is contacted with the straight baffle surface to limit the one-way locking slot 4 and the inner sleeve 1, so that the desk box 20 or the chair seat plate can not fall down; when the desk or the chair is required to be descended and adjusted, people need to press a button 11 (the button 11 and the lever 8 can be integrally manufactured or manufactured in a split mode) by fingers, the button 11 drives the lower portion of the lever 8 to swing inwards, the upper portion of the lever swings outwards in a reverse direction, a locking plug 10 on the upper portion of the lever 8 is enabled to be outwards separated from a straight blocking surface of a one-way locking slot 4, the desk or the chair can be descended at the moment, after the desk or the chair is adjusted in place, the fingers loosen the button 11, a spring 12 drives the lever 8 to reset under the action of restoring force, the locking plug 10 on the lever is inwards inserted into the one-way locking slot 4 in the corresponding position, the locking plug is matched with the straight blocking surface at the upper end of the one-way locking slot to limit the inner sleeve 1, and; if the bidirectional locking slot 5 is adopted, when the desk or the chair is adjusted to ascend or descend, a user needs to press the button 11 with fingers, the button drives the lower part of the lever 8 to swing inwards, the upper part of the lever swings outwards in a reverse direction, the locking plug 10 on the upper part of the lever is enabled to be outwards separated from the bidirectional locking slot 5, the desk or the chair can be adjusted up and down at the moment, after the desk or the chair is adjusted in place, the button 11 is loosened by the fingers, the spring 12 drives the lever 8 to reset under the action of restoring force, the locking plug 10 on the lever is inwards inserted into the bidirectional locking slot 5 in the corresponding position, the locking plug is matched with the bidirectional locking slot to limit the inner sleeve 1, and the desk box 20 or the chair seat plate cannot fall down. According to the scheme, the pressing lever type lifting adjusting mechanism for the student desk and chair is characterized in that more than two slots are formed in the outer wall of one side or two sides of an inner sleeve 1, the slots are located on the wall of the inner sleeve 1 and do not protrude out of the inner sleeve, so that the gap between the inner sleeve and an outer sleeve 2 is smaller, the matching is tight and smooth, and the assembly is reliable; secondly, the lever 8 is pressed by the button 11 to drive the lever to swing, so that the locking plug 10 on the lever swings reversely to be separated from the slot of the inner sleeve 1, the structure is simple, the operation is convenient, the manufacture is easy, and the production cost is reduced; thirdly, the outer sleeve 2 and the inner sleeve 1 form table legs or chair legs which are positioned below two sides of the table box 20 or the chair seat plate, namely, two table legs are arranged below the table box, two chair legs are arranged below the chair seat plate, one side or two side outer walls of each table leg or chair leg are provided with a pressing lever type lifting adjusting mechanism, and compared with the prior art that lifting mechanisms are arranged on cavities in four table legs, the lifting adjusting mechanism is simple in structure, can be lifted and adjusted by at most two persons, and is convenient to operate.

The invention relates to a pressing lever type lifting adjusting mechanism of a student desk and chair, wherein a rotating shaft groove 13 is formed in the inner wall of a mounting seat 6, rotating shafts 9 are formed on two sides of a lever 8, and the rotating shafts are matched with the rotating shaft groove. The lever 8 and the rotating shaft 9 can be integrally manufactured and formed or manufactured in a split mode, when the lever 8 and the rotating shaft 9 are integrally manufactured and formed, the rotating shaft groove 13 is formed in the inner wall of the mounting seat 6, the lever 8 is matched with the rotating shaft groove 13 in a rotating mode through the rotating shaft 9, if the lever 8 and the rotating shaft 9 are manufactured in a split mode, shaft holes need to be formed in the side wall of the mounting seat 6 and the lever 8, the lever is placed into the mounting seat 6, and the rotating shaft penetrates through the shaft holes of the mounting seat and the lever 8 to connect the mounting seat and the. The lever 8 is provided with a positioning groove 14 or a positioning column, and the spring 12 is matched with the positioning groove or the positioning column. A positioning groove 14 is formed in the lever 8, one end of the spring 12 is clamped into the positioning groove, or a positioning column is adopted, one end of the spring is sleeved on the positioning column, the spring 12 is positioned, the spring cannot slip off, and the assembly is reliable. The inner wall of the mounting seat 6 is provided with a limiting rib 15 which is contacted with the outer walls of two sides of the lever 8. The limiting ribs 15 limit the two sides of the lever 8, so that the lever can swing accurately without deflection. And a positioning rib 16 is arranged on the inner wall of the fixed panel 7 and matched with the inner wall of the mounting seat 6. With the positioning ribs 16, the positioning is accurate when the fixing panel 7 is assembled with the mounting seat 6.

The invention relates to another technical scheme of a pressing lever type lifting adjusting mechanism of student desk and chair, which comprises the following steps: comprises an inner sleeve 1 and an outer sleeve 2, the upper end of the inner sleeve is connected with a desk box 20 or a chair seat plate, the inner sleeve is inserted into the outer sleeve, more than two insertion holes 21 are arranged on the outer wall of one side or two sides of the inner sleeve 1, a pressing lever locking device is arranged on one side or two side walls of the outer sleeve 2 corresponding to the jacks, the pressing lever locking device comprises a mounting seat 6 which is fixed with the outer sleeve 2, a lever 8 is arranged in the mounting seat 6 and is rotationally connected with the mounting seat 6 through a rotating shaft 9, one end of the lever 8 is provided with a locking plug 10 which passes through the outer sleeve 2 to be matched with the jack 21 on the side wall of the inner sleeve 1, the side wall of the other end of the lever is provided with a button 11, a through hole 22 is formed on the mounting seat, the button passes through the through hole, a spring 12 is arranged at one end of the lever 8 on the back of the locking plug 10, and/or the other end of the lever 8 is provided with a spring on the same side of the locking plug 10.

The invention discloses another pressing lever type lifting adjusting mechanism for student desk and chair, which comprises table legs or chair legs consisting of an outer sleeve 2 and an inner sleeve 1 which are made of plastic or metal materials, wherein the table legs or the chair legs are arranged below two ends of a desk box 20 when the pressing lever type lifting adjusting mechanism is used on a desk, namely two table legs are arranged below the desk box, and the pressing lever type lifting adjusting mechanism is arranged on the outer wall of one side or two sides of each table leg or chair leg; wherein, more than two jacks 21 are arranged on the outer wall of one side or two sides of the inner sleeve 1, a pressing lever locking device is arranged on one side or two side walls of the outer sleeve 2 corresponding to the jacks 21, a mounting seat 6 of the pressing lever locking device can be manufactured and molded with the outer sleeve 2 in a split way, the mounting seat and the outer sleeve are fixed by a fastener, an opening is arranged on one side of the outer sleeve of the mounting seat, a lever 8 is arranged in the opening, the lever is rotatably connected with the mounting seat 6 by a rotating shaft 9, a locking plug 10 is arranged at one end of the lever 8, the locking plug passes through the outer sleeve 2 to be matched with the jacks 21 on the side wall of the inner sleeve 1 (the jacks can be square holes or round holes, the corresponding locking plugs are square locking plugs or round locking plugs), when a desk or a chair is lifted or descended to adjust, the button 11 is pressed by, the upper part of the lever swings outwards in the opposite direction, so that the locking plug 10 on the upper part of the lever 8 is separated from the jack 21 outwards, the desk or the chair can be adjusted up and down, after the desk or the chair is adjusted in place, the button 11 is loosened by fingers, the spring 12 drives the lever 8 to reset under the action of restoring force, the locking plug 10 on the lever is inserted into the jack 21 in the corresponding position inwards, the locking plug 10 is matched with the jack 21 to limit the inner sleeve 1, and the desk box 20 or the chair seat plate cannot fall down. According to the scheme, the pressing lever type lifting adjusting mechanism for the student desk and chair is characterized in that more than two insertion holes 21 are formed in the outer wall of one side or two sides of an inner sleeve 1, the insertion holes are located on the pipe wall of the inner sleeve 1 and do not protrude out of the inner sleeve, so that the gap between the inner sleeve 1 and an outer sleeve 2 is smaller, the matching is tight and smooth, and the assembly is reliable; secondly, the lever 8 is pressed by the button 11 to drive the lever to swing, so that the locking plug 10 on the lever swings reversely to be separated from the jack 21 of the inner sleeve 1, the structure is simple, the operation is convenient, the manufacture is easy, and the production cost is reduced; thirdly, the outer sleeve 2 and the inner sleeve 1 form table legs or chair legs which are positioned below two sides of the table box 20 or the chair seat plate, namely, two table legs are arranged below the table box, two chair legs are arranged below the chair seat plate, one side or two side outer walls of each table leg or chair leg are provided with a pressing lever type lifting adjusting mechanism, and compared with the prior art that lifting mechanisms are arranged on cavities in four table legs, the lifting adjusting mechanism is simple in structure, can be lifted and adjusted by at most two persons, and is convenient to operate.

The invention relates to a pressing lever type lifting adjusting mechanism of a student desk and chair, wherein a rotating shaft groove 13 is formed in the inner wall of a mounting seat 6, rotating shafts 9 are formed on two sides of a lever 8, and the rotating shafts are matched with the rotating shaft groove. The rotating shaft groove 13 is provided with a limiting locking plate 23, the limiting locking plate is in limiting fit with the rotating shaft 9 of the lever 8, and two ends of the limiting locking plate are fixed with the mounting seat 6 through fasteners. The lever 8 and the rotating shaft 9 can be integrally manufactured and formed, or manufactured in a split mode, when the integrally manufactured and formed mode is adopted, the rotating shaft groove 13 is formed in the inner wall of the mounting seat 6, the lever 8 is in rotating fit with the rotating shaft groove 13 through the rotating shaft 9, the rotating shaft is limited through the limiting locking plate 23, if the lever 8 and the rotating shaft 9 are manufactured in a split mode, shaft holes need to be formed in the side wall of the mounting seat 6 and the lever, the lever is placed into the mounting seat, and the shaft holes, through which the rotating shaft penetrates the mounting seat and the lever, are connected with each other to enable the lever. The lower end of the locking plug 10 is an inclined surface 24 or a straight surface 25, and the inclined surface or the straight surface is matched with the jack 21. When the locking plug 10 is used at ordinary times, the locking plug 10 is in a state of being inserted into the jack 21 of the inner sleeve 1, the lower end of the locking plug 10 is made into an inclined surface 24, when a desk or a chair is lifted and adjusted, people only need to pull the desk box 20 or the chair seat plate upwards by hands, the desk box or the chair seat plate drives the inner sleeve 1 to move upwards, the jack 21 of the inner sleeve 1 is contacted with the inclined surface 24 at the lower end of the locking plug 10, the jack pushes the inclined surface upwards, the upper part of the lever 8 automatically swings outwards under the guiding action of the inclined surface 24, the locking plug 10 of the lever 8 automatically comes out of the jack 21, when the locking plug corresponds to the next jack, the spring 12 pushes the lever 8 to reset under the elastic action, the locking plug 10 is reinserted into the jack 21, the lower end of the locking plug 10 is made into a straight surface 25, when the desk or the chair is lifted and lowered and adjusted, the button 11, the lever 8 is driven to swing through the button, so that the locking plug 10 on the lever can be lifted and lowered after being separated from the jack 21.

Claims

1. Student's desk chair presses lever lift adjustment mechanism, including interior sleeve pipe (1) and outer tube (2), desk case (20) or chair bedplate are connected to the upper end of interior sleeve pipe, and interior sleeve pipe inserts in the outer tube, its characterized in that: the locking device comprises an inner sleeve (1), wherein more than two slots are formed in the outer wall of one side or two sides of the inner sleeve (1), the slots are one-way locking slots (4) or two-way locking slots (5), the upper end of each one-way locking slot (4) is a straight blocking surface, the lower end of each one-way locking slot is an inclined guide surface, the upper end and the lower end of each two-way locking slot (5) are straight blocking surfaces, a pressing lever locking device is arranged on one side or two side walls of the outer sleeve (2) corresponding to the slots and comprises a mounting seat (6), the mounting seat is fixed with the outer sleeve (2), a fixing panel (7) is arranged at the opening of the mounting seat and fixed with the mounting seat, a lever (8) is arranged in the mounting seat and is rotatably connected with the mounting seat through a rotating shaft (9), a locking plug (10) is formed at one end of the lever, and the locking plug penetrates through the, a button (11) is arranged on the side wall of the other end of the lever, the button penetrates through the fixing panel (7), a spring (12) is arranged on the back face, located on the locking plug (10), of one end of the lever (8), and/or a spring is arranged on the same side, located on the locking plug (10), of the other end of the lever (8).

2. A lever-type lifting adjusting mechanism for student desk and chair as claimed in claim 1 wherein: the inner wall of the mounting seat (6) is provided with a rotating shaft groove (13), two sides of the lever (8) are provided with rotating shafts (9), and the rotating shafts are matched with the rotating shaft groove.

3. A lever-type lifting adjusting mechanism for student desk and chair as claimed in claim 1 wherein: the lever (8) is provided with a positioning groove (14) or a positioning column, and the spring (12) is matched with the positioning groove or the positioning column.

4. A lever-type lifting adjusting mechanism for student desk and chair as claimed in claim 1 wherein: the inner wall of the mounting seat (6) is provided with a limiting rib (15) which is contacted with the outer walls of two sides of the lever (8).

5. A lever-type lifting adjusting mechanism for student desk and chair as claimed in claim 1 wherein: and the inner wall of the fixed panel (7) is provided with a positioning rib (16), and the positioning rib is matched with the inner wall of the mounting seat (6).

6. Student's desk chair presses lever lift adjustment mechanism, including interior sleeve pipe (1) and outer tube (2), desk case (20) or chair bedplate are connected to the upper end of interior sleeve pipe, and interior sleeve pipe inserts in the outer tube, its characterized in that: more than two insertion holes (21) are arranged on the outer wall of one side or two sides of the inner sleeve (1), one side or two side walls of the outer sleeve (2) corresponding to the jacks are provided with pressing lever locking devices, the pressing lever locking device comprises a mounting seat (6) which is fixed with the outer sleeve (2), a lever (8) is arranged in the mounting seat and is rotationally connected with the mounting seat through a rotating shaft (9), one end of the lever is provided with a locking plug (10) which passes through the outer sleeve (2) to be matched with the jack on the side wall of the inner sleeve (1), the side wall of the other end of the lever is provided with a button (11), a through hole (22) is arranged on the mounting seat, the button passes through the through hole, a spring (12) is arranged at one end of the lever (8) and positioned on the back of the locking plug (10), and/or the other end of the lever (8) is provided with a spring on the same side of the locking plug (10).

7. A lever-type lifting adjusting mechanism for student desk and chair as claimed in claim 6 wherein: the inner wall of the mounting seat (6) is provided with a rotating shaft groove (13), two sides of the lever (8) are provided with rotating shafts (9), and the rotating shafts are matched with the rotating shaft groove.

8. A press lever type lifting mechanism of student desk and chair as claimed in claim 7 wherein: the rotating shaft groove (13) is provided with a limiting locking plate (23), the limiting locking plate is in limiting fit with the rotating shaft (9) of the lever (8), and two ends of the limiting locking plate are fixed with the mounting seat (6) through fasteners.

9. A lever-type lifting adjusting mechanism for student desk and chair as claimed in claim 6 wherein: the lower end of the locking plug (10) is an inclined plane (24) or a straight plane (25), and the inclined plane or the straight plane is matched with the jack (21).