CN218304080U

CN218304080U - Lifting locking mechanism, seat and lifting table

Info

Publication number: CN218304080U
Application number: CN202222618230.7U
Authority: CN
Inventors: 何文锋
Original assignee: Guangdong Wanrui Furniture Industry Co ltd
Current assignee: Guangdong Wanrui Furniture Industry Co ltd
Priority date: 2022-10-06
Filing date: 2022-10-06
Publication date: 2023-01-17
Anticipated expiration: 2032-10-06

Abstract

The utility model provides a lift locking mechanical system, seat and lift table relates to table chair technical field. Including support sleeve and bracing piece, the bracing piece is worn to locate in the support sleeve, is equipped with the locking subassembly of locking bracing piece on the support sleeve, is equipped with the vertical motion restriction subassembly of restriction bracing piece in the support sleeve. The lifting locking mechanism arranged in the technical scheme is mainly used for replacing supporting parts such as tables and chairs, and is convenient for adjusting the horizontal height of a seat or a desk so as to adapt to students with different heights and body types; the problem that the lifting locking mechanism swings when in use can be solved. The chair comprises a chair seat, a chair back and a lifting locking mechanism as shown above, wherein the chair seat and the chair back are of an integrated structure, and the lifting locking mechanism is arranged below the chair seat. A lifting table comprises a table top and a lifting locking mechanism, wherein the lifting locking mechanism is arranged below the table top.

Description

Lifting locking mechanism, seat and lifting table

Technical Field

The utility model relates to a table chair technical field particularly, relates to a lift locking mechanical system, seat and lift table.

Background

Tables, chairs and stools in daily life are various in form, and particularly, a lifting leg structure is applied. Taking a table as an example, a lifting desk in the prior art comprises a fixed matching part, a desk leg pipe and a desk leg pipe, wherein the desk leg pipe is sleeved on the desk leg pipe and is provided with corresponding through holes; generally, table foot pipe or table leg pipe are made by plastic materials, and the fixed fitting piece passes corresponding through-hole on table foot pipe and the table foot pipe, and table foot pipe both sides face receive fixed fitting piece's extrusion force respectively, and table foot pipe or table leg pipe hardness performance that plastic materials made are poor, lead to the deformation of table foot pipe or table leg pipe after long-term the use easily, damage even, influence the life of table foot pipe or table leg pipe.

At present, when a learning table, a computer table, a desk, a learning chair or other tables and chairs are used, the height of the table or chair needs to be adjusted sometimes according to the sitting height of a user, particularly, the height of a student changes rapidly along with the growth of the age, so that the height of the desk or chair needs to be adjusted continuously in the process of using the table or chair, the eyesight of the student is protected conveniently, and meanwhile, when the desk or chair is used, people with different heights have different requirements on the height of the table or chair, and the height of the table or chair needs to be adjusted when the desk or chair is used.

And lift chair mainly fixes lift portion and supporting part through the screw among the prior art, and the screw generally sets up in the inboard of lift portion and supporting part, and nevertheless the user can be when using lift chair's in-process adjustment position of sitting or health production rock, leads to lift portion to use the screw to lean forward or pitch backward as the relative supporting part of fixed point, and then causes and can't keep the level with lift portion fixed connection's seat support, influences user's use and experiences.

Thus, the prior art has yet to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lift locking mechanical system, seat and lift table, it can solve among the prior art lift locking mechanical system wobbling problem when using.

The embodiment of the utility model is realized like this:

the embodiment of the application provides a lifting locking mechanism, including support sleeve and bracing piece, in the bracing piece was worn to locate support sleeve, the last locking subassembly that is equipped with the locking bracing piece of support sleeve was equipped with the vertical motion restriction subassembly of restriction bracing piece in the support sleeve.

The utility model discloses an in some embodiments, the locking subassembly includes the regulation and control board, on the regulation and control board set up with the bracing piece on the locking hole of adaptation, the arbitrary one end of regulation and control board articulates in the upper end of support sleeve, the downthehole spacing subassembly that is equipped with the motion of restriction bracing piece of locking.

The utility model discloses an in some embodiments, the restriction subassembly includes a plurality of gibs, and a plurality of gibs encircle to set up on the lateral wall of bracing piece along vertical direction, set up a plurality of guide ways with the gib block adaptation on the supporting sleeve's the inside wall.

The utility model discloses an in some embodiments, spacing subassembly sets up the locking strip on the downthehole wall of locking including rotating, has seted up a plurality of locking grooves along its axial equidistance on the lateral wall of bracing piece, is equipped with the positioning subassembly of restriction locking strip motion on the inner wall in locking hole.

The utility model discloses an in some embodiments, the positioning assembly is equipped with the piece that resets including setting up the arch on the locking strip, the lateral wall arm butt of arch and bracing piece between locking hole and the locking strip.

The utility model discloses an in some embodiments, the piece that resets is reset spring, and reset spring's one end and the interior wall connection in locking hole, reset spring's the other end and the lateral wall of locking strip are connected.

The utility model discloses an in some embodiments, the piece that resets is the torsional spring, the one end of torsional spring and the interior wall connection in locking hole, and the other end of torsional spring is connected with the lateral wall of locking strip.

In some embodiments of the present invention, the free end of the locking strip is provided with a ball.

A chair comprises a chair seat, a chair back and a lifting locking mechanism as shown above, wherein the chair seat and the chair back are of an integrated structure, and the lifting locking mechanism is arranged below the chair seat.

A lifting table comprises a table top and a lifting locking mechanism, wherein the lifting locking mechanism is arranged below the table top.

Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:

the embodiment of the application provides a lifting locking mechanism, including support sleeve and bracing piece, in the bracing piece wore to locate support sleeve, the last locking subassembly that is equipped with the locking bracing piece of support sleeve is equipped with the vertical motion restriction subassembly of restriction bracing piece in the support sleeve. The lifting locking mechanism arranged in the technical scheme is mainly used for replacing supporting parts such as tables and chairs, so that the structure replaces the conventional desk with the supporting parts fastened by common bolts, and the problems that the conventional supporting parts are always fixedly connected by bolts, the horizontal height of a seat or the desk is inconvenient to adjust, and the supporting parts cannot be adapted to students with different heights and body shapes are solved; the problem that the lifting locking mechanism swings when in use can be solved; in order to solve the problems, the supporting sleeve and the supporting rod are both made of cylindrical aluminum alloy tubular materials; the outer diameter of the manufactured support rod is smaller than the inner diameter of the support sleeve, and the support rod and the support sleeve are in clearance fit, so that the support rod can be prevented from shaking in the support sleeve; after the supporting rod is stretched out for a certain distance along the axial direction of the supporting sleeve, the supporting rod can be locked on the supporting sleeve through a locking assembly arranged on the supporting sleeve, and the supporting rod is prevented from returning into the supporting sleeve; the actual riding effect of the passengers or the users is influenced; if the supporting rod suddenly retracts into the supporting sleeve, certain injury can be caused to passengers, and the safety of the passengers is endangered; and the limiting component arranged in the supporting sleeve can avoid the supporting rod from shaking in the supporting sleeve, so that the stability and the safety of the equipment during operation are influenced.

A chair comprises a chair seat, a chair back and a lifting locking mechanism as shown above, wherein the chair seat and the chair back are of an integrated structure, and the lifting locking mechanism is arranged below the chair seat. The seat and the chair back are made of aluminum alloy pipe fittings, and are integrally formed and welded on the supporting rod through a welding process, a supporting base is arranged at the bottom of the supporting sleeve and is plate-shaped, and a wear-resistant rubber layer is arranged on the supporting base.

A lifting table comprises a table top and a lifting locking mechanism, wherein the lifting locking mechanism is arranged below the table top. A single lifting locking mechanism or two groups of lifting locking mechanisms can be adopted to provide support for the table top after being matched.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic perspective view of a lifting locking mechanism of the present invention;

FIG. 2 is a schematic cross-sectional view of the lift lock mechanism of the present invention;

fig. 3 is an enlarged schematic view of the utility model at a in fig. 2;

FIG. 4 is a schematic perspective view of the chair according to the present invention;

fig. 5 is a schematic view of a three-dimensional structure from the present invention to a table.

Icon: 1. a support bar; 2. a guide strip; 3. a control panel; 4. a bolt; 5. a support sleeve; 6. a protrusion; 7. a locking bar; 8. a locking groove; 9. a return spring; 10. a support base; 11. a chair seat; 12. a chair back; 13. a desktop.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

Referring to fig. 1-5, fig. 1 is a schematic perspective view of a lifting locking mechanism of the present invention; FIG. 2 is a schematic cross-sectional view of the lift lock mechanism of the present invention; fig. 3 is an enlarged schematic view of the utility model at a in fig. 2; FIG. 4 is a schematic perspective view of the chair according to the present invention; fig. 5 is a schematic view of a three-dimensional structure from the present invention to a table.

The embodiment of the application provides a lift locking mechanical system, including support sleeve 5 and bracing piece 1, in support sleeve 5 was worn to locate by bracing piece 1, be equipped with the locking subassembly of locking bracing piece 1 on support sleeve 5, be equipped with the vertical motion restriction subassembly of restriction bracing piece 1 in the support sleeve 5. The lifting locking mechanism arranged in the technical scheme is mainly used for replacing supporting parts such as tables and chairs, so that the structure replaces the supporting parts of the existing desk fastened by the common bolts 4, and the problems that the conventional supporting parts are always connected through the bolts 4 in a permanent manner, the horizontal height of the seat or the desk is inconvenient to adjust, and the lifting locking mechanism cannot be adapted to students with different heights and body shapes are avoided; the problem that the lifting locking mechanism swings when in use can be solved; in order to solve the problems, the supporting sleeve 5 and the supporting rod 1 are both made of cylindrical aluminum alloy tubular materials; the outer diameter of the support rod 1 is smaller than the inner diameter of the support sleeve 5, and the support rod 1 and the support sleeve 5 are in clearance fit, so that the support rod 1 can be prevented from shaking in the support sleeve 5; after the support rod 1 is stretched out for a certain distance along the axial direction of the support sleeve 5, the support rod 1 can be locked on the support sleeve 5 through a locking assembly arranged on the support sleeve 5, so that the support rod 1 is prevented from retracting into the support sleeve 5; the actual riding effect of the passengers or the users is influenced; if the supporting rod 1 suddenly retracts into the supporting sleeve 5, certain injury can be caused to passengers, and the safety of the passengers is endangered; and the limiting component arranged in the supporting sleeve 5 can prevent the supporting rod 1 from shaking in the supporting sleeve 5, so that the stability and the safety of the equipment during operation are influenced.

The utility model discloses an in some embodiments, the locking subassembly includes regulation and control board 3, regulation and control board 3 on offer with the bracing piece 1 on the locking hole of adaptation, the arbitrary one end of regulation and control board 3 articulates in the upper end of support sleeve 5, the downthehole spacing subassembly that is equipped with the motion of restriction bracing piece 1 of locking. The arranged regulation and control plate 3 is arranged on the end surface of the support sleeve 5 through a bolt 4, an oval mounting opening is formed in the regulation and control plate 3, and the inner diameter of the mounting opening is equal to the outer diameter of a screw of the bolt 4; the adjusting plate 3 can deflect a certain angle on the supporting sleeve 5 under the limitation of the bolt 4, so that the supporting rod 1 can be locked and unlocked, and the supporting rod 1 is prevented from returning into the supporting sleeve 5; the actual riding effect of the passengers or the users is influenced; the supporting rod 1 is arranged to penetrate through a locking hole formed in the regulating plate 3; when a user pushes the regulating plate 3 upwards along the vertical direction, the limiting component for limiting the movement of the supporting rod 1 is arranged in the locking hole, so that the limiting effect on the supporting rod 1 is relieved, and the supporting rod 1 can freely stretch and retract in the supporting sleeve 5; when the user promoted regulation and control board 3 downwards along vertical direction, the downthehole spacing subassembly that is equipped with restriction bracing piece 1 motion of locking will play the limiting displacement to bracing piece 1, and bracing piece 1 this moment will not freely stretch out and draw back in support sleeve 5, supplies the people normal use, accords with different use crowds' user demand.

The utility model discloses an in some embodiments, the restriction subassembly includes a plurality of gibs 2, and a plurality of gibs 2 encircle along vertical direction and set up on the lateral wall of bracing piece 1, set up a plurality of guide ways with 2 adaptations of gib s on the inside wall of support sleeve 5. The arranged guide strip 2 is made of the same material as the support rod 1; the guide bars 2 are integrally formed with the support rod 1 by adopting a welding process, and the number of the guide bars 2 is 2 or 3; the support rod 1 can be prevented from shaking in the support sleeve 5, and the support rod 1 does not move in the support sleeve 5 in the vertical direction to provide guidance, so that the accuracy of the equipment in operation is ensured; the guide groove that sets up is the dovetail, and gib block 2 and guide groove looks adaptation this moment.

The utility model discloses an in some embodiments, spacing subassembly sets up locking strip 7 on the downthehole wall of locking including rotating, has seted up a plurality of locking grooves 8 along its axial equidistance on the lateral wall of bracing piece 1, is equipped with the positioning subassembly of restriction locking strip 7 motion on the inner wall in locking hole. When a user pushes the regulating plate 3 upwards along the vertical direction, the locking strip 7 arranged on the limiting assembly can embed the locking strip 7 in the locking hole into a part of the support rod 1 to gradually exit from the locking groove 8 under the movement of the regulating plate 3, so that the limiting effect on the support rod 1 is relieved, and the support rod 1 can freely stretch and retract in the support sleeve 5; when the user promoted regulation and control board 3 downwards along vertical direction, locking strip 7 that the locking was downthehole to be equipped with will be under the effect of positioning assembly progressively inlay and establish in the locking groove 8 of bracing piece 1, will play the limiting displacement to bracing piece 1, bracing piece 1 this moment will not freely stretch out and draw back in support sleeve 5, supplies people's normal use, accords with different use crowds' user demand.

The utility model discloses an in some embodiments, the position adjusting subassembly is equipped with the piece that resets including setting up arch 6 on locking strip 7, arch 6 and the lateral wall arm butt of bracing piece 1 between locking hole and the locking strip 7. The protrusion 6 on the locking strip 7 is arranged, so that when a user pushes the regulating plate 3 upwards in the vertical direction; at this moment, because the position of the bulge 6 between the regulating plate 3 and the supporting rod 1 changes, a horizontal leftward horizontal force is applied to the bulge 6 positioned on the left side of the supporting rod 1, and the locking strip 7 is forced to move in the direction close to the inner wall of the locking hole; namely, the locking strip 7 is embedded in the local part of the support rod 1 and gradually exits from the locking groove 8 under the movement of the regulating plate 3, the limiting effect on the support rod 1 is relieved, and the support rod 1 at the moment can freely stretch out and draw back in the support sleeve 5;

when the user promoted regulation and control board 3 downwards along vertical direction, locking strip 7 that the locking was downthehole to be equipped with will be under the effect that resets progressively inlay and establish in the locking groove 8 of bracing piece 1, will play the limiting displacement to bracing piece 1, bracing piece 1 this moment will not freely stretch out and draw back in support sleeve 5, supplies people's normal use, accords with different use crowds' user demand.

The positioning components are arranged in two groups, symmetrically arranged on the inner wall of the locking port, and the locking strips 7 in the two groups of positioning components are parallel to each other.

The utility model discloses an in some embodiments, the piece that resets is reset spring 9, and reset spring 9's one end and the interior wall connection in locking hole, reset spring 9's the other end and the lateral wall of locking strip 7 are connected. Enable locking strip 7 and possess certain clearance for between the inner wall in locking hole, can also avoid rocking bracing piece 1 time, the phenomenon that locking strip 7 drops from locking groove 8 takes place.

The utility model discloses an in some embodiments, the piece that resets is the torsional spring, the one end of torsional spring and the interior wall connection in locking hole, and the other end of torsional spring is connected with the lateral wall of locking strip 7. Enable locking strip 7 and possess certain clearance for between the inner wall in locking hole, can also avoid rocking bracing piece 1 time, the phenomenon that locking strip 7 drops from locking groove 8 takes place.

In some embodiments of the present invention, the free end of the locking strip 7 is provided with a ball. The end of the locking strip 7 is prevented from becoming worn more, which makes the device practical. The material of the arranged ball body is made of wear-resistant metal material. And the free end of the locking strip 7 is welded with the ball.

A chair comprises a seat 11, a backrest 12 and a lifting locking mechanism as shown above, wherein the seat 11 and the backrest 12 are of an integrated structure or a combined structure, and the lifting locking mechanism is arranged below the seat 11. The seat support 11 and the back of the chair 12 of setting all adopt the aluminum alloy pipe fitting to make, and the two integrated into one piece, then the riveting is fixed with the seat pad on seat support 11 and back of the chair 12, welds on bracing piece 1 through welding process, then is equipped with support base 10 in the bottom of support sleeve 5, and support base 10 is platelike, and is equipped with wear-resisting rubber layer on the support base 10 that sets up, and has seted up a plurality of air vents on seat support 11 and back of the chair 12. And the lifting locking mechanisms are arranged in two groups, and the two supporting sleeves 5 are welded and formed through reinforcing rods, so that the stability of the seat is improved. The supporting base 10 is two tubular pipes, and the supporting base 10 is in an "L" shape and is connected with the supporting sleeve 5 by welding.

A lifting table comprises a table top 13 and a lifting locking mechanism as shown above, wherein the lifting locking mechanism is arranged below the table top 13. A single lift lock mechanism or two sets of lift lock mechanisms may be used in conjunction to provide support for table top 13. And the lifting locking mechanisms are arranged in two groups, and the two supporting sleeves 5 are welded and formed through reinforcing rods, so that the stability of the table is improved. Desktop 13 is equipped with the check of accomodating article to desktop 13 is last to be seted up and to be long banding standing groove and be circular shape cup fixed orifices.

Still be equipped with the support stabilizer bar in the lift table, the support stabilizer bar is two and is pipe-like tubular product to support base 10 and be "L" form, be connected with support sleeve 5 through the welded mode, and through strengthening pole welded forming, increase the stability of seat on two support stabilizer bars.

To sum up, shown in this application embodiment provides a lift locking mechanical system, including support sleeve 5 and bracing piece 1, in support sleeve 5 was worn to locate by bracing piece 1, be equipped with the locking subassembly of locking bracing piece 1 on support sleeve 5, be equipped with the vertical motion restriction subassembly of restriction bracing piece 1 in the support sleeve 5. The lifting locking mechanism arranged in the technical scheme is mainly used for replacing supporting parts such as tables and chairs, so that the structure replaces the supporting parts of the existing desk fastened by the common bolts 4, and the problems that the conventional supporting parts are always connected through the bolts 4 in a permanent manner, the horizontal height of the seat or the desk is inconvenient to adjust, and the lifting locking mechanism cannot be adapted to students with different heights and body shapes are avoided; the problem that the lifting locking mechanism swings when in use can be solved; in order to solve the problems, the supporting sleeve 5 and the supporting rod 1 are both made of cylindrical aluminum alloy tubular materials; the outer diameter of the support rod 1 is smaller than the inner diameter of the support sleeve 5, and the support rod 1 and the support sleeve 5 are in clearance fit, so that the support rod 1 can be prevented from shaking in the support sleeve 5; after the support rod 1 is stretched out for a certain distance along the axial direction of the support sleeve 5, the support rod 1 can be locked on the support sleeve 5 through a locking assembly arranged on the support sleeve 5, so that the support rod 1 is prevented from retracting into the support sleeve 5; the actual riding effect of the passengers or the users is influenced; if the support rod 1 suddenly retracts into the support sleeve 5, certain injury can be caused to passengers, and the safety of the passengers is endangered; and the limiting component arranged in the supporting sleeve 5 can prevent the supporting rod 1 from shaking in the supporting sleeve 5, so that the stability and the safety of the equipment during operation are influenced.

A chair comprises a seat 11, a backrest 12 and a lifting locking mechanism as described above, wherein the seat 11 and the backrest 12 are integrated, and the lifting locking mechanism is arranged below the seat 11. The seat support 11 and the back of the chair 12 that set up all adopt the aluminum alloy pipe fitting to the two integrated into one piece welds on bracing piece 1 through welding process, then is equipped with support base 10 in the bottom of support sleeve 5, supports base 10 and is platelike, and is equipped with wear-resisting rubber layer on the support base 10 that sets up.

A lifting table comprises a table top 13 and a lifting locking mechanism as shown above, wherein the lifting locking mechanism is arranged below the table top 13. A single lift lock mechanism or two sets of lift lock mechanisms may be used in conjunction to provide support for table top 13.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lifting locking mechanism, its characterized in that, includes supporting sleeve and bracing piece, the bracing piece is worn to locate in the supporting sleeve, be equipped with the locking on the supporting sleeve the locking subassembly of bracing piece, be equipped with the restriction in the supporting sleeve the vertical motion restriction subassembly of bracing piece.

2. The lifting locking mechanism according to claim 1, wherein the locking assembly comprises a control plate, the control plate is provided with a locking hole matched with the support rod, any one end of the control plate is hinged to the upper end of the support sleeve, and a limiting assembly for limiting the movement of the support rod is arranged in the locking hole.

3. The lift locking mechanism of claim 1, wherein the limiting assembly comprises a plurality of guide bars, the plurality of guide bars are disposed around the outer side wall of the support rod along the vertical direction, and the inner side wall of the support sleeve is provided with a plurality of guide grooves adapted to the guide bars.

4. The lifting locking mechanism according to claim 2, wherein the limiting component comprises a locking strip rotatably disposed on the inner wall of the locking hole, the outer side wall of the support rod is provided with a plurality of locking grooves at equal intervals along the axial direction of the support rod, and the inner wall of the locking hole is provided with a positioning component for limiting the movement of the locking strip.

5. The lift locking mechanism of claim 4, wherein the positioning assembly comprises a protrusion disposed on the locking bar, the protrusion abuts against an outer sidewall arm of the support bar, and a reset member is disposed between the locking hole and the locking bar.

6. The lift lock mechanism of claim 5, wherein the return member is a return spring, one end of the return spring is connected to an inner wall of the locking hole, and the other end of the return spring is connected to a side wall of the locking bar.

7. The lifting locking mechanism according to claim 5, wherein the reset member is a torsion spring, one end of the torsion spring is connected with the inner wall of the locking hole, and the other end of the torsion spring is connected with the side wall of the locking strip.

8. A lift lock mechanism according to any one of claims 4 to 7, wherein the free end of the locking bar is provided with a ball.

9. A chair comprising a seat, a back and a lift lock mechanism as claimed in any one of claims 1 to 8, the seat and back being of unitary construction, the lift lock mechanism being disposed beneath the seat.

10. A lifting table comprising a table top and a lifting lock mechanism as claimed in any one of claims 1 to 8, the lifting lock mechanism being disposed below the table top.