CN217565249U - Table and chair foot lifting key adjusting mechanism, table and chair - Google Patents

Abstract

The utility model provides a table chair foot lift button adjustment mechanism, desk and chair belongs to table chair technical field. It has solved the current unstable problem of table chair foot lift button adjustment mechanism long-time use. This table chair foot lift button adjustment mechanism, including table chair outer support leg and peg graft on table chair outer support leg and along table chair outer support leg oscilaltion and with table or the interior supporting leg of table chair connection, set up a plurality of regulation holes on the table chair outer support leg, set up spacing hole on the supporting leg in the table chair, be equipped with the lift adjustment lever that the support leg is connected in middle part and the table chair in the support leg in the table chair, the lower extreme of lift adjustment lever links firmly elastic component, this lift button adjustment mechanism includes the lift button of vertical sliding connection at the supporting leg upper end in the table chair, the upper end of lift adjustment lever is equipped with presses the briquetting. This table chair foot lift button adjustment mechanism, desk and chair have promoted the long-time stability of using of lift button adjustment mechanism.

Description

Table and chair foot lifting key adjusting mechanism, table and chair

Technical Field

The utility model belongs to the technical field of table chair, a table chair foot lift button adjustment mechanism, table and chair is related to.

Background

At present, when work and study, the frequency of use to the table chair is very high, especially to the user, every user's height all is different to when needs noon break, need heighten the table, the person of facilitating the use lies and sleeps under the table, consequently current table foot and chair foot all adopt height-adjustable mode for promote the practicality of table chair.

The Chinese patent application (CN 102551341A) discloses a lifting device for a table and a chair, which is easy to adjust the height, comprising an outer supporting leg of the table and the chair, an inner supporting leg of the table and the chair, which is sheathed in the outer supporting leg of the table and the chair and can be vertically lifted along the outer supporting leg of the table and the chair, and is fixedly connected with the supporting surface of the table and the chair, the outer supporting leg of the table and the inner supporting leg of the table and the chair are respectively provided with connecting holes which are mutually corresponding, a bolt is inserted between the mutually corresponding connecting holes, the position of the inner supporting leg of the table and the chair after vertical lifting is adjusted and fixed by the bolt, the bolt is hinged and arranged on the outer supporting leg of the table and the chair, a bolt reset spring is arranged between the bolt and the outer supporting leg of the table and the chair, the head of the bolt passes through the connecting hole of the outer supporting leg of the table and the chair and is inserted into the corresponding connecting hole of the inner supporting leg of the table and the chair, the bolt reset spring keeps the head of the bolt in a state of being inserted into the connecting hole of the inner and outer supporting legs of the table and chair, meanwhile, the lower contact surface of the head of the bolt in contact with the connecting hole is an inclined surface, the connecting hole of the inner supporting leg of the table and chair upwards pushes the inclined surface when the table and chair upwards lift, meanwhile, the bolt rotates around a hinge point, the bolt drives the inclined surface to leave the connecting hole of the inner supporting leg of the table and chair, in the lifting process of the inner supporting leg of the table and chair, under the action of the bolt reset spring, when the head of the bolt meets the connecting hole of the inner supporting leg of the table and chair on the upper portion, the head of the bolt falls into the connecting hole on the upper portion, the position after the inner supporting leg of the table and chair ascends is fixed again by the bolt, and the action of improving the height of the table and chair is completed.

Although above-mentioned structure can be to table chair foot height regulation, but because this bolt articulates on the outer support leg of table chair, consequently need press the bolt many times, lead to pressing the back many times, the skew about the bolt can produce, bolt position unstability can influence the bolt and insert the degree of accuracy of the connecting hole of the inside and outside supporting leg of table chair, because most table chairs are when using, thereby it uses or the person of facilitating the use of taking a nap to realize giving different statures to need often to highly adjusting, consequently, the frequency of use of bolt is higher, lead to table chair elevating gear's regulation unstability.

Disclosure of Invention

The utility model aims at solving the problems of the prior art and providing a table and chair foot lifting key adjusting mechanism, a table and a chair, which aims to solve the technical problems that: how to solve the current unstable problem of table chair foot lift button adjustment mechanism long-time use.

The purpose of the utility model can be realized by the following technical proposal:

a lifting key adjusting mechanism for table and chair legs comprises outer supporting legs of a table and chair inner supporting leg which is inserted in the outer supporting legs of the table and chair, ascends and descends along the outer supporting legs of the table and chair, and is connected with a table board or a chair board, a plurality of adjusting holes are formed in the outer supporting legs of the table and chair, and a limiting hole is formed in the inner supporting leg of the table and chair.

The working principle is as follows: the lifting adjusting mechanism is provided with the lifting keys, when the lifting keys are not pushed, one ends of the elastic pieces penetrate through the limiting holes and are inserted into the corresponding adjusting holes, so that the connection and the positioning of the outer supporting legs of the table and the inner supporting legs of the table and the table are realized, when the relative positions of the inner supporting legs of the table and the outer supporting legs of the table and the table are required to be adjusted, the lifting keys only need to be pushed upwards, as the upper ends of the lifting adjusting levers are provided with the pressing blocks, the lifting keys abut against the extrusion surfaces, the pressing blocks are pushed into the inner supporting legs of the table and the table through the extrusion surfaces when the lifting adjusting levers gradually rise, the middle parts of the lifting adjusting levers are connected with the inner supporting legs of the table and the table, the upper ends of the lifting adjusting levers are pushed to swing around the connecting points, one ends of the lifting adjusting levers retract into the inner supporting legs of the table and the inner supporting legs of the table are pulled to move upwards, the lifting adjusting levers move downwards after the lifting keys are moved to the positions required to be adjusted, the lifting keys are reset, the lifting adjusting levers to drive the lifting adjusting levers to swing along the lifting keys, and the lifting keys to be in a long time, and further maintain the stability of the lifting adjusting mechanism in a long-time.

In foretell table chair foot lift button adjustment mechanism, the upper end of supporting leg has cup jointed spacing sliding sleeve in the table chair, vertical spout that the opening is down is seted up to spacing sliding sleeve, be equipped with the vertical spout of embedding and along the gliding sliding part of vertical spout on the lift button, the sliding part supports mutually with the groove top wall of vertical spout and supports and lean on.

The setting of this structure for the lift button is when vertical slip, and spacing sliding sleeve of accessible carries on spacingly, and in order to prevent lift button roll-off table chair internal support leg, consequently be provided with the sliding part at lift button, the sliding part upwards slides to leaning on the back with the groove top wall of vertical spout mutually, can not continue to slide along vertical spout, makes the lift button can not the spacing sliding sleeve of roll-off at the slip in-process, further promotion lift button adjustment mechanism's stability.

In foretell table chair foot lift button adjustment mechanism, spacing sliding sleeve has the spacing chamber of opening down, the lift button still has the spacing portion that is located outside the spacing chamber and the support portion that is located the spacing intracavity, spacing portion and support portion pass through the sliding part and connect, vertical spout is seted up on the chamber wall in spacing chamber, spacing portion, support portion and sliding part surround and form spacing notch, the chamber wall part in spacing chamber sets up in spacing notch.

Through the setting of spacing portion for lift up of lift button with push down more convenient operation, and through the setting of spacing notch, when making the sliding part slide along vertical spout, spacing portion supports with the outer wall in spacing chamber and leans on, support portion and the inner wall in spacing chamber support and lean on, make the lift button can be stable when sliding and support with pressing the briquetting and lean on, and then promoted the vertical gliding stability of lift button.

In foretell table chair foot lift button adjustment mechanism, the opening reset groove up has been seted up on the spacing portion, and this lift button adjustment mechanism is including setting up the reset spring in the reset groove, reset spring's upper end and the roof in spacing chamber support and lean on, reset spring has the elasticity of pushing down spacing portion all the time.

The structure is arranged, so that after the supporting legs in the table and the chair and the outer supporting legs of the table and the chair slide in place, the lifting keys can be directly loosened, the limiting parts slide downwards to the initial positions under the action of the elastic force of the reset springs, the lifting adjusting levers recover the initial positions, the supporting legs in the table and the chair and the outer supporting legs of the table and the chair are positioned through the elastic pieces at the lower ends of the lifting adjusting levers, and convenience of the lifting key adjusting mechanism is improved.

In the table and chair foot lifting key adjusting mechanism, the top wall of the limiting cavity is provided with a limiting column for the reset spring to be sleeved with, and the limiting column is arranged opposite to the reset groove.

The setting of spacing post for reset spring can be more stable when pushing down spacing portion, further promotion the stability that the lift button resets.

In the table and chair leg lifting key adjusting mechanism, the outer wall of the limiting part is a pushing wall which is inclined outwards from bottom to top, and at least one pushing notch with an outward opening is formed in the pushing wall.

Promote the wall and promote the breach through setting up, when promoting the lift button, can put into the finger and promote in the breach, more person of facilitating the use for spacing portion can be quick is lifted up, has promoted user's use comfort and use convenience.

In the table and chair foot lifting key adjusting mechanism, the lower end of the limiting sliding sleeve is fixedly connected with a plugging plate, and the plugging plate is plugged with the opening of the limiting cavity.

The setting of shutoff board for the lift button can be followed the lower extreme of spacing sliding sleeve and slided in, and rethread shutoff board is spacing at spacing intracavity after the lift button slides in, and when the elastic component worn to establish on the outer support leg of table chair, the lift button was placed on the shutoff board, has also made things convenient for the assembly and the dismantlement of lift button when promoting the lift button.

In the table and chair foot lifting key adjusting mechanism, two reset grooves are arranged and are respectively positioned at the left side and the right side of the inlet and outlet hole.

The setting of this structure has avoided reset spring to go up and down the button and die with the chamber wall card in spacing chamber when reseing for holistic elasticity is even, thereby has promoted the stability that the lift button resets.

In the above-mentioned table and chair foot lifting key adjusting mechanism, the lifting key adjusting mechanism includes a connecting sleeve sleeved on the upper end of the supporting leg in the table and chair, and the outer side wall of the connecting sleeve protrudes outwards to form the above-mentioned pressing block.

Due to the arrangement of the connecting sleeve, on one hand, the integral structure of the lifting adjusting lever does not need to be changed, and the cost of the lifting key adjusting mechanism is reduced; on the other hand, often there is the friction with the lift button according to the briquetting when using for a long time, according to the briquetting and appear damaging easily, so adopt split type design to make the change of adapter sleeve more convenient.

In foretell table chair foot lift button adjustment mechanism, the interval has between the lateral wall of lift adjustment lever and the inside wall of table chair internal support leg, lift adjustment lever's middle part is inserted and is equipped with the bolt, lift adjustment lever is stretched out at the both ends of bolt, and the both ends of bolt all overlap and be equipped with the interior stopper of being connected that can take place deformation, connect interior stopper insert in the table chair internal support leg and with the table chair internal support leg tight fit be connected.

The plug is arranged on the lifting adjusting lever in an inserting mode, the plug is connected to the two ends of the plug in a sleeved mode, the plug can be directly connected with the lifting adjusting lever, the plug is extruded into the supporting leg in the table and chair through the plug in the connecting mode, the elastic piece at one end of the lifting adjusting lever can be embedded into the limiting hole or the button can penetrate through the elastic piece or the button to be positioned when the supporting leg in the table and chair is connected with the lifting adjusting lever, the plug is connected with the supporting leg in the table and chair only for two times, the outer side wall of the lifting adjusting lever and the inner side wall of the supporting leg in the table and chair are spaced, the lifting adjusting lever can swing faster, the lifting adjusting lever is convenient and concise to mount more, and the stability of adjustment of the lifting key adjusting mechanism and the convenience of mounting are improved.

In the table and chair foot lifting key adjusting mechanism, the connecting inner plug comprises an annular body and a mounting column arranged in the body, and one end of the plug pin is embedded into the mounting column and connected with the connecting inner plug.

The setting of erection column for when the bolt inserts in connecting in the stopper, can be more stable, avoided the bolt to take place to rock in connecting in the stopper, set up through the erection column and lead to the bolt and spacing to bolt circumference, also further promotion simultaneously in the intensity of stopper in the connection, further promotion the stability of bolt assembly.

In the table and chair foot lifting key adjusting mechanism, the lifting adjusting lever is a hollow rod.

The setting of this structure for the lift adjustment lever is when satisfying intensity, and the lift adjustment lever also reduces the dead weight of self as far as, makes pressing more convenient of button, and also can reduce the friction of lift adjustment lever between rotation in-process and stopper, promotes the convenience of lift adjustment structure operation when guaranteeing that lift adjustment lever intensity satisfies the requirement.

In foretell table chair foot lift button adjustment mechanism, the elastic component is U type shell fragment, the one end and the lateral wall of lift adjustment lever of U type shell fragment are connected, the one end of U type shell fragment is equipped with the spacing head that can wear to establish in the adjusting hole, the other end of U type shell fragment leans on with the inside wall counterbalance of table chair internal support leg.

U type shell fragment compares in current spring mounting more convenient to in long-term the use, can keep better elasticity, make spacing head have the trend towards spacing hole motion all the time, further promotion table chair foot lift's convenience.

A table is characterized in that the table and chair leg lifting key adjusting mechanism is arranged in the table.

The height adjustment of the table legs in the table is convenient and fast due to the arrangement of the structure, the overall influence on the table is small, and the adjustment stability can be ensured during long-term use.

A chair is characterized in that the chair leg lifting key adjusting mechanism is arranged in the chair.

The structure is arranged, so that the height of the chair legs in the chair can be adjusted more conveniently, the whole chair is not greatly influenced, and the stability of adjustment can be ensured during long-term use.

Compared with the prior art, the utility model has the advantages of: through the cooperation of pressing block and lift button for the regulation of lift adjustment lever and swing more stable, the lift button all need follow the extrusion face contact of pressing the block at vertical slip in-process, thereby realize spacing to the lift button, has promoted in long-term use, and the lift button remains stable throughout with the stability of pressing the block, and then has promoted the stability of lift button adjustment mechanism long-time use.

Drawings

Fig. 1 is a schematic structural view of the present invention assembled on a table.

Figure 2 is a side view of the utility model assembled on a table.

Fig. 3 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

Fig. 5 is a partially enlarged view at B in fig. 3.

Fig. 6 is a schematic view of the structure of the present invention assembled on a chair.

Fig. 7 is the structure schematic diagram of the utility model discloses well lift adjustment lever, lift button, adapter sleeve, spacing sliding sleeve, shutoff board, U type shell fragment and bolt after assembling.

Fig. 8 is a schematic structural view of the assembled middle-position limiting sliding sleeve and the assembled plugging plate of the present invention.

Fig. 9 is a schematic structural view of the middle lifting button of the present invention.

Fig. 10 is a schematic structural view of the assembled connecting sleeve and the supporting leg in the table and chair of the present invention.

Fig. 11 is a schematic structural view of the assembled connecting inner plug and the inserted pin of the present invention.

In the figure, 1, the outer supporting legs of the table and chair; 11. an adjustment hole; 2. a table plate; 3. a chair plate; 4. supporting legs in the table and chair; 41. an inlet and outlet hole; 42. a limiting hole; 43. a limiting port; 5. a lifting adjusting lever; 51. a bolt; 52. connecting an inner plug; 52a, a body; 52b, mounting posts; 53. positioning holes; 6. an elastic member; 61. a limiting head; 62. an opening; 63. positioning the boss; 7. a lifting key; 71. a sliding part; 72. a limiting part; 72a, a pusher wall; 72b, pushing the notch; 73. an abutting portion; 73a, a reset groove; 74. a limiting notch; 8. connecting sleeves; 81. pressing the block; 81a, a pressing surface; 9. a limiting sliding sleeve; 91. a vertical chute; 92. a limiting cavity; 93. a limiting column; 10. a return spring; 101. a plugging plate; 102. spacing; 103. and (4) bolts.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1-11, the lifting key adjusting mechanism for the table and chair legs comprises outer supporting legs 1 of the table and chair and inner supporting legs 4 of the table and chair, wherein the inner supporting legs 4 of the table and chair are inserted into the outer supporting legs 1 of the table and chair, lift up and down along the outer supporting legs 1 of the table and chair and are connected with a table plate 2 or a chair plate 3, a plurality of adjusting holes 11 are formed in the outer supporting legs 1 of the table and chair, and limiting holes 42 are formed in the inner supporting legs 4 of the table and chair.

Specifically, as shown in fig. 1 to 10, a lifting adjusting lever 5 connected with a supporting leg 4 in the table and chair is arranged in the supporting leg 4 in the table and chair, the lower end of the lifting adjusting lever 5 is fixedly connected with an elastic piece 6, the lifting key adjusting mechanism comprises a lifting key 7 vertically and slidably connected to the upper end of the supporting leg 4 in the table and chair, a pressing block 81 is arranged at the upper end of the lifting adjusting lever 5, an access hole 41 through which the pressing block 81 can penetrate is formed in the upper end wall of the supporting leg 4 in the table and chair, an extruding surface 81a inclined from bottom to top is arranged on the pressing block 81, when the supporting leg 4 in the table and chair slides to a limiting hole 42 and is opposite to any adjusting hole 11, one end of the elastic piece 6 penetrates through the limiting hole 42 and is inserted into the corresponding adjusting hole 11, when the lifting key 7 slides upwards along the supporting leg 4 in the table and chair, the pressing surface 81a is abutted against the extruding surface 81a pressing block 4 so that the lifting adjusting lever 5 swings to one end of the elastic piece 6 around a connecting point and retracts out of the adjusting hole 11.

The working principle is as follows: by arranging the lifting key 7, when the lifting key 7 is not pushed, one end of the elastic element 6 passes through the limiting hole 42 and is inserted on the corresponding adjusting hole 11, so that the connection and the positioning of the outer supporting leg 1 of the table and the chair and the inner supporting leg 4 of the table and the chair are realized, when the relative position of the inner supporting leg 4 of the table and the chair and the outer supporting leg 1 of the table and the chair needs to be adjusted, only the lifting key 7 needs to be pushed upwards, because the upper end of the lifting adjusting lever 5 is provided with the pressing block 81, the lifting key 7 is abutted against the pressing surface 81a, the pressing block 81 is pushed into the inner supporting leg 4 of the table and the chair from the access hole 41 through the pressing surface 81a when the lifting adjusting lever gradually rises, the middle part of the lifting adjusting lever 5 is connected with the inner supporting leg 4 of the table and the chair, the upper end of the lifting adjusting lever 5 is pushed, so that the lifting adjusting lever 5 swings around the connecting point, and swings until one end of the elastic element 6 retracts into the inner supporting leg 4 of the table and the chair, and one end of the elastic piece 6 is moved out of the adjusting hole 11, the supporting leg 4 in the table and chair can be moved relatively to the supporting leg 1 outside the table and chair by pulling the supporting leg 4 in the table and chair to move up and down, after the position to be adjusted is moved, the lifting key 7 slides downwards along the upper end of the supporting leg 4 in the table and chair, the upper end of the lifting adjusting lever 5 is reset to drive the lifting adjusting lever 5 to swing along the connecting point, the elastic piece is penetrated into the supporting leg 4 in the table and chair again under the action of elastic force, the adjustment and the swing of the lifting adjusting lever 5 are more stable by the matching of the pressing block 81 and the lifting key 7, the lifting key 7 is contacted with the extrusion surface 81a of the pressing block 81 in the vertical sliding process, thereby the lifting key 7 is limited, and the stability of the lifting key 7 and the pressing block 81 is kept stable all the time in the long-term use process is promoted, and then promoted the long-time stability of using of lift button adjustment mechanism.

As shown in fig. 3-10, a limiting sliding sleeve 9 is sleeved at the upper end of a support leg 4 in a table and chair, the limiting sliding sleeve 9 has a limiting cavity 92 with a downward opening, a vertical sliding groove 91 with a downward opening is formed in the cavity wall of the limiting cavity 92, a sliding portion 71 embedded in the vertical sliding groove 91 and sliding along the vertical sliding groove 91 is arranged on a lifting key 7, a limiting portion 72 located outside the limiting cavity 92 and an abutting portion 73 located inside the limiting cavity 92, the limiting portion 72 and the abutting portion 73 are connected through the sliding portion 71, the sliding portion 71 abuts against the top wall of the vertical sliding groove 91, a blocking plate 101 is fixedly connected to the lower end of the limiting sliding sleeve 9, the blocking plate 101 blocks the opening of the limiting cavity 92, the limiting portion 72, the abutting portion 73 and the sliding portion 71 form a limiting notch 74 in a surrounding manner, and the cavity wall portion of the limiting cavity 92 is arranged inside the limiting notch 74.

As shown in fig. 3-5, the inlet and outlet hole 41 has a vertical opening, two reset grooves 73a with upward openings are formed in the abutting portion 72, the two reset grooves 73a are respectively located on the left side and the right side of the inlet and outlet hole 41, the lifting key adjusting mechanism comprises a reset spring 10 arranged in the reset groove 73a, the upper end of the reset spring 10 abuts against the top wall of the limiting cavity 92, the reset spring 10 has elastic force for pressing the limiting portion 72 down all the time, a limiting column 93 for sleeving the reset spring 10 is arranged on the top wall of the limiting cavity 92, and the limiting column 93 is opposite to the reset groove 73 a.

As shown in fig. 9 and 10, the outer wall of the limiting portion 72 is a pushing wall 72a inclined outward from bottom to top, the pushing wall 72a is provided with at least one pushing notch 72b with an outward opening, the lifting key adjusting mechanism includes a connecting sleeve 8 sleeved on the upper end of the supporting leg 4 in the table and chair, and the outer side wall of the connecting sleeve 8 protrudes outward to form the pressing block 81.

As shown in fig. 5, 7 and 11, the lifting adjusting lever 5 is a flat hollow rod, the elastic member 6 is a U-shaped elastic sheet, one end of the U-shaped elastic sheet is connected with the outer side wall of the lifting adjusting lever 5, one end of the U-shaped elastic sheet is provided with a limiting head 61 which can penetrate through the adjusting hole 11, the other end of the U-shaped elastic sheet abuts against the inner side wall of the supporting leg 4 in the table and chair, a positioning boss 63 is formed by a protrusion on the end face where the limiting head 61 is connected with the lifting adjusting lever 5, a positioning hole 53 for the positioning boss 63 to be embedded is formed on the lifting adjusting lever 5, a limiting opening 43 is formed by a depression on the inner side wall of the supporting leg 4 in the table and chair, the other end part of the U-shaped elastic sheet is embedded into the limiting opening 43, a notch 62 of the U-shaped elastic sheet is arranged opposite to the end part of the lower end of the lifting adjusting lever 5, and one end of the U-shaped elastic sheet is connected with the lifting adjusting lever 5 through a bolt 103.

As shown in fig. 5 and 11, an interval 102 is arranged between the outer side wall of the lifting adjusting lever 5 and the inner side wall of the support leg 4 in the table and chair, a bolt 51 is inserted in the middle of the lifting adjusting lever 5, the two ends of the bolt 51 extend out of the lifting adjusting lever 5, and the two ends of the bolt 51 are both sleeved with a deformable connecting inner plug 52, the connecting inner plug 52 is inserted into the support leg 4 in the table and chair and is tightly matched with the support leg 4 in the table and chair, the connecting inner plug 52 comprises an annular body 52a and a mounting column 52b arranged in the body 52a, and one end of the bolt 51 is embedded into the mounting column 52b and is connected with the connecting inner plug 52.

Example two

The content of this embodiment is substantially the same as that of the first embodiment, and the difference is that: one end of the U-shaped elastic sheet is welded or glued with the lower end of the lifting adjusting lever 5.

EXAMPLE III

The content of this embodiment is substantially the same as that of the first embodiment, and the difference is that: the elastic pieces 6 are both a limiting pin fixedly connected to the lower end of the lifting adjusting lever 5 and a return spring 10, the limiting pin can penetrate through the limiting hole 42 and is inserted into the corresponding adjusting hole 11, the limiting pin is arranged on the side wall of one side of the lifting adjusting lever 5, and the return spring 10 is arranged on the side wall of the other side of the lifting adjusting lever 5 and has a tendency of enabling the limiting pin to move towards the limiting hole 42.

Example four

As shown in fig. 1 to 5, a table is provided with the lifting key adjusting mechanism of the first embodiment, the second embodiment or the third embodiment.

EXAMPLE five

As shown in fig. 6, a chair is provided with the lifting key adjusting mechanism according to the first embodiment, the second embodiment or the third embodiment.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (15)

1. A lifting key adjusting mechanism for table and chair legs comprises a table and chair outer supporting leg (1) and a table and chair inner supporting leg (4) which is inserted on the table and chair outer supporting leg (1), ascends and descends along the table and chair outer supporting leg (1) and is connected with a table plate (2) or a chair plate (3), a plurality of adjusting holes (11) are formed in the table and chair outer supporting leg (1), a limiting hole (42) is formed in the table and chair inner supporting leg (4), the lifting key adjusting mechanism is characterized in that a lifting adjusting lever (5) with the middle part connected with the table and chair inner supporting leg (4) is arranged in the table and chair inner supporting leg (4), the lower end of the lifting adjusting lever (5) is fixedly connected with an elastic piece (6), the lifting key adjusting mechanism comprises a lifting key (7) which is vertically and slidably connected with the upper end of the table and chair inner supporting leg (4), a pressing block (81) is arranged at the upper end wall of the lifting adjusting lever (5), a pressing surface (81) which is arranged from bottom to top and is provided with a pressing hole (41) through which is used for inserting the corresponding limiting block (81) when the lifting adjusting lever (11) passes through the limiting hole (42), the lifting key (7) abuts against the extrusion surface (81 a) when sliding upwards along the supporting leg (4) in the table and the chair and pushes the pressing block (81) into the supporting leg (4) in the table and the chair so that the lifting adjusting lever (5) swings around the connecting point to one end of the elastic piece (6) to retract and move out of the adjusting hole (11).

2. The mechanism for adjusting the lifting keys of the table and chair legs as claimed in claim 1, wherein a limiting sliding sleeve (9) is sleeved on the upper end of the supporting leg (4) in the table and chair, the limiting sliding sleeve (9) is provided with a vertical sliding groove (91) with a downward opening, a sliding portion (71) which is embedded into the vertical sliding groove (91) and slides along the vertical sliding groove (91) is arranged on the lifting key (7), and the sliding portion (71) abuts against the top wall of the vertical sliding groove (91).

3. The mechanism for adjusting the lifting key of the table and chair leg as claimed in claim 2, wherein the limiting sliding sleeve (9) has a limiting cavity (92) with a downward opening, the lifting key (7) further has a limiting part (72) located outside the limiting cavity (92) and an abutting part (73) located inside the limiting cavity (92), the limiting part (72) and the abutting part (73) are connected through a sliding part (71), the vertical sliding groove (91) is formed in the wall of the limiting cavity (92), the limiting part (72), the abutting part (73) and the sliding part (71) surround to form a limiting notch (74), and the wall of the limiting cavity (92) is partially arranged inside the limiting notch (74).

4. The mechanism as claimed in claim 3, wherein the abutting portion (73) is provided with a reset groove (73 a) with an upward opening, the mechanism comprises a reset spring (10) disposed in the reset groove (73 a), the upper end of the reset spring (10) abuts against the top wall of the limit cavity (92), and the reset spring (10) has an elastic force for pressing the limit portion (72) all the time.

5. The mechanism as claimed in claim 4, wherein a limiting post (93) for a return spring (10) to be sleeved is disposed on the top wall of the limiting cavity (92), and the limiting post (93) is disposed opposite to the return groove (73 a).

6. The mechanism as claimed in claim 3, 4 or 5, wherein the outer wall of the position-limiting part (72) is a pushing wall (72 a) inclined from bottom to top and arranged outwards, and the pushing wall (72 a) is provided with at least one pushing notch (72 b) with an outward opening.

7. A table and chair foot lifting key adjusting mechanism as claimed in any one of claims 2-5, wherein the lower end of the limiting sliding sleeve (9) is fixedly connected with a blocking plate (101), and the blocking plate (101) is blocked with the opening of the limiting cavity (92).

8. The mechanism as claimed in claim 4 or 5, wherein there are two reset grooves (73 a), and the two reset grooves (73 a) are respectively located at the left and right sides of the access hole (41).

9. A lifting key adjusting mechanism for table and chair legs as claimed in any one of claims 1 to 5, wherein the lifting key adjusting mechanism comprises a connecting sleeve (8) sleeved on the upper end of the supporting leg (4) in the table and chair, and the outer side wall of the connecting sleeve (8) protrudes outwards to form the pressing block (81).

10. A table and chair foot lifting key adjusting mechanism as claimed in any one of claims 1-5, wherein a space (102) is arranged between the outer side wall of the lifting adjusting lever (5) and the inner side wall of the table and chair inner supporting leg (4), a bolt (51) is inserted in the middle of the lifting adjusting lever (5), two ends of the bolt (51) extend out of the lifting adjusting lever (5), two ends of the bolt (51) are respectively sleeved with a connecting inner plug (52), and the connecting inner plug (52) is inserted into the table and chair inner supporting leg (4) and is tightly matched and connected with the table and chair inner supporting leg (4).

11. The mechanism for adjusting the elevation key of the desk and chair leg as claimed in claim 10, wherein the connecting inner plug (52) comprises a ring-shaped body (52 a) and a mounting column (52 b) arranged in the body (52 a), and one end of the bolt (51) is embedded in the mounting column (52 b) and connected with the connecting inner plug (52).

12. A table and chair foot lifting key adjusting mechanism as claimed in any one of claims 1-5, characterized in that the lifting adjusting lever (5) is a hollow rod.

13. A table and chair foot lifting key adjusting mechanism as claimed in any one of claims 1-5, wherein the elastic member (6) is a U-shaped elastic sheet, one end of the U-shaped elastic sheet is connected with the outer side wall of the lifting adjusting lever (5), one end of the U-shaped elastic sheet is provided with a limiting head (61) which can be arranged in the adjusting hole (11) in a penetrating manner, and the other end of the U-shaped elastic sheet abuts against the inner side wall of the supporting leg (4) in the table and chair.

14. A table comprising a lift key adjustment mechanism as claimed in any one of claims 1 to 13.

15. A chair, characterized in that the chair comprises a lifting key adjustment mechanism according to any one of claims 1-13.

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