CN210169314U - Passive semi-automatic lifting table - Google Patents

Abstract

The utility model belongs to the technical field of furniture technique and specifically relates to a passive semi-automatic lift table. This passive semi-automatic lift table includes: the table comprises a table plate, a scissor assembly, table legs, a lower frame and a controllable gas spring, wherein the table legs are fixedly connected with the lower frame, the scissor assembly is positioned between the table plate and the lower frame, the controllable gas spring comprises a gas rod main body and a control mechanism used for switching the allowable telescopic state and the limited telescopic state of the gas rod main body, the scissor assembly is used for guiding the moving direction of the table plate, the upper end of the gas rod main body is connected with the table top, the lower end of the gas rod main body is connected with the table legs or the lower frame, and the gas rod main body is used for driving the table plate to ascend when the gas rod main body is in the allowable telescopic state. The passive semi-automatic lifting table in the utility model can realize the automatic lifting of the table top without a power supply; the scissor assembly has the characteristic of excellent synchronization performance, so that the table plate can be stable and good in performance when ascending and descending.

Description

Passive semi-automatic lifting table

Technical Field

The utility model belongs to the technical field of furniture technique and specifically relates to a passive semi-automatic lift table.

Background

In recent years, with the rapid development and popularization of computer technology, more and more people work or learn through computers. The computer brings convenience to work and life of people, and meanwhile, many people suffer from occupational diseases. In some fields or certain work stations, people have to face computers for a long time. Working before sitting in a computer for a long time accumulated in the day and the month, not only can the eyesight be possibly reduced, but also office occupational diseases such as cervical spondylosis, lumbar spondylosis and the like can be caused.

In order to reduce occupational diseases, people should pay attention not to be overworked but to be combined with overstrain and ease; on the other hand care is taken to maintain the correct office posture. Recent research shows that people can better prevent modern occupational diseases if the people can work alternately in sitting postures and standing postures. Therefore, office tables capable of being lifted electrically appear on the market, and the requirements of people for standing and sitting for working can be met. However, such office tables are generally complex in structure and relatively expensive.

At present, a small lifting table is also available on the market, the lifting table is mainly of a manually folded and pulling-up screw fastening structure, most products are positioned and arranged on the ground through wheels, the products have lower price advantage and convenience, but the products have some problems. The height of the desk needs to be adjusted, and then the computer, the keyboard and the mouse are placed on the desk for use, if the desk is used for one time or two times, the desk is inconvenient to sit/stand for alternative office for a long time.

Referring to fig. 1, a chinese utility model patent with publication number CN204580324U discloses a small-sized gas spring lifting table, which comprises a table top and a lifting mechanism for supporting the table top, wherein the lifting mechanism comprises a controllable gas spring device, an X-shaped support structure and a base; the X-shaped support structures are arranged on two sides of the bottom of the desktop respectively, and the desktop is connected with the base in a lifting mode through the two X-shaped support structures; the controllable gas spring device is arranged on the base and is in power connection with at least one set of the X-shaped support structure, and the desktop can be driven to ascend to a set height through the X-shaped support structure. The small-size air spring lifting table adopting the technical scheme of the utility model has the advantages of simple and reasonable structure, low in manufacturing cost, owing to adopted controllable air spring device to drive X-shaped supporting structure moreover to finally drive the desktop and rise to setting for the height, therefore it is very convenient to use, and the personnel that are particularly suitable for long-term use computer work realize sitting/stand office in turn, thereby are favorable to user's health.

However, the controllable gas spring device of the small gas spring lifting table is arranged on the base in parallel with the table top, when the lifting table is in a folded state, the angle between the X-shaped support and the table top is about 3 degrees, the force required by the controllable gas spring device for driving the X-shaped support is the largest, the deflection born by the X-shaped support is also the largest, and deformation is easy to generate or the driving force is insufficient, so that the use performance is influenced; part of the stroke of raising and lowering requires the user to assist in raising or lowering the table.

Referring to fig. 2, chinese patent publication No. CN108497694A discloses a pneumatic double-leg lifting table with rows of teeth, which comprises table top supporting members arranged in bilateral symmetry and a horizontal supporting member connected between the two table top supporting members, wherein the lower end of the table top supporting member is fixedly connected with an upper upright post, and the lower end of the upper upright post is movably sleeved in a lower upright post; a row of teeth is fixedly arranged in the upper upright column along the longitudinal direction of the upper upright column, a synchronizing tooth is fixedly arranged on the inner side surface of the lower upright column, the synchronizing teeth are correspondingly meshed with the row teeth on the same side, and a synchronizing shaft is fixedly arranged between the axes of the two synchronizing teeth; the upper and lower upright columns on each side are respectively provided with a controllable gas spring, the horizontal supporting piece is provided with a pull handle switch, and the desktop supporting piece is provided with a pull rod; the pull handle switch is connected with a left pull wire and a right pull wire. This pneumatic row of two legs tooth lift table is not only simple structure, the simple operation, and the left and right sides can be synchronous completely moreover to when the desktop receives external pressure under the immovable condition, the desktop can not sink.

In order to enable the left side and the right side of the lifting table to be completely synchronously provided with the row teeth, the synchronous teeth and the synchronous shafts, the parts are high in machining and assembling precision, relatively complex in structure and inconvenient in subsequent maintenance.

Referring to fig. 3, chinese utility model publication No. CN201326600Y discloses a button-controlled lockable gas spring, in which a partition plate is arranged in a cylinder to divide the cylinder into an air cavity and an oil cavity. The end of the air cavity is sealed, and inert gas is filled in the air cavity. The oil chamber is divided into two parts by the piston and the valve core and filled with oil. The piston is connected with the piston rod. The piston rod is hollow, a mandril is arranged in the piston rod and used for jacking the valve core to enable the two parts of the oil cavity to be communicated, and the other end of the piston rod is connected with the joint. The joint is provided with a joint lever, and the push rod can be pressed to open the valve core under the pulling of the inhaul cable. One end of the inhaul cable is connected with the joint lever, the other end of the inhaul cable is connected with the button lever, and the inhaul cable sheath is respectively connected with the joint and the button shell. The button lever can pull the inhaul cable under the pushing action of the button. The utility model discloses a have the characteristics of operate steadily, sealed reliable, long service life, interior oil charge, gas have flame retardant efficiency, and the while installation is nimble, convenient to use.

The button-controlled lockable gas spring is easy to cause that a button is too tight and cannot push a button lever to pull a cable in the actual use process, so that a valve core cannot be opened to influence the lifting of a lifting table.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a passive semi-automatic lift table that synchronism performance is good and can rise automatically.

In order to achieve the advantages, the utility model provides a passive semi-automatic lifting table includes: the table comprises a table plate, a scissor assembly, table legs, a lower frame and a controllable gas spring, wherein the table legs are fixedly connected with the lower frame, the scissor assembly is positioned between the table plate and the lower frame, the controllable gas spring comprises a gas rod main body and a control mechanism used for switching the allowable telescopic state and the limited telescopic state of the gas rod main body, the scissor assembly is used for guiding the moving direction of the table plate, the upper end of the gas rod main body is connected with the table top, the lower end of the gas rod main body is connected with the table legs or the lower frame, and the gas rod main body is used for driving the table plate to ascend when the gas rod main body is in the allowable telescopic state.

In an embodiment of the present invention, the air rod body includes a cylinder and a piston rod accommodated in the cylinder, and the control mechanism includes a connecting seat fixed at an end of the piston rod, a valve needle accommodated in the piston rod, a pressing plate rotatably connected with the connecting seat for driving the valve needle to contract, a driving rope connected with the pressing plate, and a rope puller for driving the pressing plate through the driving rope.

In an embodiment of the present invention, the scissors assembly includes at least a pair of parallel rods a and a pair of parallel rods B, the middle portions of the rods a and B are rotatably connected to the axial fixing portion, one ends of the rods a and B are respectively rotatably connected to the table and the lower frame to the axial fixing portion, the rods a and B are provided with a sliding portion a and a sliding portion B, and the lower frame and the table are respectively fixed with a guide rail or a sliding groove corresponding to the transverse sliding of the sliding portion a and the sliding portion B.

In an embodiment of the present invention, an upper frame is fixed to the lower surface of the table plate, and the upper frame and the lower frame are respectively provided with a notch or a key groove provided for the sliding portion a and the sliding portion B to slide on the side wall corresponding to the sliding portion a and the sliding portion B.

In an embodiment of the invention, the drive lines of the plurality of controllable gas springs are connected to the same rope puller.

In an embodiment of the utility model, the scissor assembly is along passive semi-automatic lift table length direction symmetry sets up, and this scissor assembly includes a pair of parallel pole A and a pair of parallel pole B, and this pole A and pole B middle part are rotated and are connected axial fixity, and this pole A and this pole B's homonymy end is rotated with the middle part of table and underframe respectively and is connected axial fixity.

The utility model discloses an in one embodiment, cut the fork subassembly and include at least a pair of parallel pole A and a pair of parallel pole B, this pole A and pole B middle part are rotated and are connected the axial fixity, and this pole A, this pole B's both ends are equipped with sliding part A, sliding part B respectively, and this underframe and this table are fixed with respectively and correspond complex lateral sliding's guide rail or spout respectively with this sliding part A, this sliding part B, the underframe is connected with on being close to the lateral wall of this underframe inside wall's pole A or pole B and is used for guaranteeing to cut the fork subassembly in the motion process pole A with the middle part of pole B rotates the locating lever that the tie point was just moved from top to bottom all the time.

In an embodiment of the present invention, a horizontal rod is fixedly connected between the rod a and the other rod a, and a horizontal rod is fixedly connected between the rod B and the other rod B, and a tension spring for assisting the passive semi-automatic lifting table to ascend or descend is arranged between the horizontal rod of the rod a and the horizontal rod of the rod B or between the lower frame and the horizontal rod.

In an embodiment of the present invention, the table or the scissors assembly is connected and fixed with a foot-stepping pulling portion which is vertically downward and driven by a single foot of a user to descend the table.

In an embodiment of the present invention, the lower frame is fixedly connected to a position corresponding to the controllable gas spring, and a position limiting member for preventing the controllable gas spring from swinging when the controllable gas spring is stretched.

The passive semi-automatic lifting table is provided with the controllable gas spring, the upper end of a gas rod main body of the controllable gas spring is connected with the table top, the lower end of the gas rod main body is connected with the table legs or the lower frame, the table top is automatically driven to ascend when the gas rod main body is in a state of allowing expansion, the table top is pressed down when the gas rod main body descends, and the semi-automatic lifting is realized without a power supply; the scissor assembly is arranged between the table plate and the lower frame and has the characteristic of excellent synchronization performance, so that the table plate can be stable and good in performance when ascending and descending.

The utility model discloses an embodiment has set up the tension spring who is used for supplementary passive semi-automatic lift table to rise or descend between the horizontal pole of pole A and the horizontal pole of pole B or between underframe and the horizontal pole, and tension spring uses with controllable air spring cooperation can realize better lift effect, satisfies customer's user demand the most likely.

In an embodiment of the utility model, the table or the scissors subassembly is connected and is fixed with the foot that the perpendicular decurrent single-foot drive table descends and steps on the pulling portion, steps on the pulling portion through the foot and replaces the user to exert the power of pushing down to the table with the hand when the lift table descends, convenience more and laborsaving.

Drawings

Fig. 1 is a schematic structural view of a conventional small gas spring lifting table.

Fig. 2 is a schematic structural diagram of a conventional double-leg pneumatic tooth-arrangement lifting table.

Fig. 3 is a schematic structural diagram of a conventional lockable gas spring controlled by a button.

Fig. 4 is a schematic structural view of a passive semi-automatic lifting table according to a first embodiment of the present invention.

Fig. 5 is a schematic view illustrating a connection structure between the legs and the lower frame of the passive semi-automatic lifting table shown in fig. 4.

Fig. 6 is a partial enlarged view of a portion a of fig. 5.

Fig. 7 is a schematic structural view showing the scissor assembly and the guide rail of the passive semi-automatic lifting table of fig. 4.

Fig. 8 is a schematic structural view of a scissor assembly with a cross bar of the passive semi-automatic lift table of fig. 4.

Fig. 9 is a schematic structural view of a controllable gas spring of the passive semi-automatic lifting table of fig. 4.

Fig. 10 is a partial enlarged view of fig. 9 at B.

Fig. 11 is a schematic structural view showing the matching between the scissor assembly and the sliding chute of the passive semi-automatic lifting table according to the second embodiment of the present invention.

Fig. 12 is a schematic structural view of a passive semi-automatic lifting table according to a third embodiment of the present invention.

Fig. 13 is a schematic structural view of a passive semi-automatic lifting table with another structure according to a third embodiment of the present invention.

Fig. 14 is a schematic structural view of a passive semi-automatic lifting table according to a fourth embodiment of the present invention.

Fig. 15 is a schematic structural view of a passive semi-automatic lifting table with another structure according to a fourth embodiment of the present invention.

Fig. 16 is a schematic view illustrating a structure of a rotating roller of the passive semiautomatic lifting table of fig. 14.

Fig. 17 is a schematic view illustrating a structure of a rotating roller of the passive semi-automatic elevating table of fig. 15.

Fig. 18 is a schematic structural view of a passive semi-automatic lifting table according to a fifth embodiment of the present invention.

Fig. 19 is a schematic structural view of a passive semi-automatic lifting table according to a sixth embodiment of the present invention.

Fig. 20 is a schematic structural view of a passive semi-automatic lifting table according to a seventh embodiment of the present invention.

Fig. 21 is a schematic structural view of a passive semi-automatic lifting table according to an eighth embodiment of the present invention.

Fig. 22 is a schematic structural view of a passive semi-automatic lifting table according to a ninth embodiment of the present invention.

Fig. 23 is a schematic view showing the installation position of a tension spring of a passive semi-automatic lifting table according to a tenth embodiment of the present invention.

Fig. 24 is a schematic view showing another installation position of the tension spring of the passive semi-automatic lifting table according to the tenth embodiment of the present invention.

Fig. 25 is a schematic structural view of a foot-operated pulling portion of a passive semi-automatic lifting table according to an eleventh embodiment of the present invention.

Fig. 26 is a schematic structural view of a foot-operated pulling portion of a passive semi-automatic lifting table according to an eleventh embodiment of the present invention, the foot-operated pulling portion being fixed to a scissors assembly.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description will be given with reference to the accompanying drawings and preferred embodiments in order to provide the best mode, structure, features and effects according to the present invention.

Referring to fig. 4-10, a passive semi-automatic lifting table according to a first embodiment of the present invention includes: table board 1, scissors fork subassembly 2, table leg 4, underframe 5, controllable air spring 6.

Referring to fig. 5-6, the legs 4 are fixedly connected to the lower frame 5. Specifically, the lower frame 5 includes a pair of parallel long bars 51, a pair of parallel short bars 52, and a plurality of angle irons 53 for connecting the long bars 51 and the short bars 52. The angle between long rod 51 and short rod 52 is 90 °. The two sides of the angle iron 53 are respectively welded and fixed with the ends of the long rod 51 and the short rod 52. The table legs 4 are of a square tubular structure, the connecting pieces 41 for connecting and fixing the angle iron 53 through bolts are arranged inside the table legs 4, and the connecting pieces 41 are of a rectangular plate-shaped structure. The side walls of the table legs 4 are provided with through holes for allowing bolts to pass through. The table legs 4 and the lower frame 5 are detachably connected and fixed through bolts, so that the table legs are convenient to detach when needing to be transported, and the occupied space of packaging is reduced.

The opening at the upper end of the table leg 4 is provided with an elastic pad 43, and the elastic pad 43 is used for keeping the table board 1 from contacting with the upper end of the table leg 4 when the table board descends to the lowest position, so that noise and scratches cannot be generated. The opening at the lower end of the table leg 4 is provided with a table leg 45 with adjustable height, which is convenient for adjusting the table leg 45 on the slightly uneven or slightly inclined ground to stably place the table.

Referring to fig. 7-8, the scissor assembly 2 is positioned between the table 1 and the lower frame 5. The scissor assembly 2 is used to guide the direction of movement of the table 1. The scissor assembly 2 comprises a pair of parallel rods A1 and a pair of parallel rods B1, the middle parts of the rods A1 and B1 are rotatably connected and axially fixed, one ends of the rods A1 and B1 are respectively rotatably connected and axially fixed with the table plate 1 and the lower frame 5, the other ends of the rods A1 and B1 are provided with sliding parts A2 and B2, and the lower frame 5 and the table plate 1 are respectively fixed with a guide rail 7 which is used for enabling the sliding parts A2 and B2 to transversely slide and is respectively correspondingly matched with the sliding parts A2 and B2.

Further, a cross bar A3 and a cross bar B3, and a cross bar A3 and a cross bar B3 are respectively connected and fixed between the bar a1 and the other bar a1, the bar B1 and the other bar B1, so as to improve the stability of the scissor assembly 2. The slide portion a2 and the slide portion B2 are slide wheels connected and fixed to the other end portions of the rod a1 and the rod B1, respectively. The section of the guide rail 7 is of a U-shaped structure, and the guide rail 7 is fixedly connected with the lower frame 5 and the table board 1 through bolts or welded.

Referring to fig. 9-10, the controllable gas spring 6 includes a gas rod main body 61, and a control mechanism 62 for switching the gas rod main body 61 between a state of allowing expansion and a state of restricting expansion. The upper end of the air rod main body 61 is connected with the desktop, and the lower end is connected with the table legs 4 or the lower frame 5. The air lever main body 61 is used for driving the table plate 1 to ascend when the air lever main body 61 is in a telescopic allowing state.

The air rod main body 61 includes a cylinder 611 and a piston rod 612 accommodated in the cylinder 611. The control mechanism 62 comprises a connecting seat 621 fixed at the end of the piston rod 612, a valve needle 623 accommodated in the piston rod 612, a pressing plate 624 rotatably connected with the connecting seat 621 for driving the valve needle 623 to contract, a driving rope 625 connected with the pressing plate 624, and a rope puller 627 for driving the pressing plate 624 through the driving rope 625. The rope pulling device 627 is fixed on the lower surface of the table board 1.

The number of the controllable gas springs 6 is 2, and the 2 controllable gas springs 6 are symmetrically arranged and fixed at the outer side of the middle of the table leg 4 in the width direction.

The working process of the passive semi-automatic lifting table is as follows: when the table needs to be lifted, the pull rope devices 627 on two sides below the table plate 1 are pulled to drive the pressing plates 624 to press the valve needle 623, so that the symmetrically arranged controllable gas springs 6 are all in a state of allowing stretching, at the moment, the table plate 1 rises at a constant speed under the acting force of the controllable gas springs 6, when the table plate 1 reaches the required height, the pull rope devices 627 are loosened to enable the valve needle 623 to reset, so that the controllable gas springs 6 are in a state of limiting stretching, the effect of automatic lifting is achieved, and the lifting height is freely controlled by a user.

When the table is descended, the motion principle is basically consistent with that of ascending, only after the rope pulling device 627 is pulled to enable the controllable gas spring 6 to be in a state of allowing stretching, a user is required to apply downward pressing force, the table 1 descends under triple acting force of gravity of the table 1, gravity of objects on the table 1 and the downward pressing force, and the height of the table 1 when the rope pulling device 627 is loosened is maintained when the rope pulling device 627 is loosened. The scissor assembly 2 maintains the stability of the table 1 when it is raised or lowered.

Referring to fig. 11, in the passive semi-automatic lifting table according to the second embodiment of the present invention, the scissor assembly 2 includes a pair of parallel rods a1 and a pair of parallel rods B1, the middle portions of the rods a1 and B1 are rotatably connected to the axial fixing portion, one ends of the rods a1 and B1 are rotatably connected to the table 1 and the lower frame 5 respectively and axially fixed, the other ends of the rods a1 and B1 are provided with a sliding portion a2 and a sliding portion B2, and the lower frame 5 and the table 1 are respectively fixed with a sliding slot 8 which is correspondingly matched with the sliding portion a2 and the sliding portion B2.

Further, the slide portion a2 and the slide portion B2 are columnar structures connected and fixed to the ends of the rod a1 and the rod B1, respectively. The sliding groove 8 is a tubular structure provided with a key-shaped groove 81 with the width equal to the diameter of the columnar structure.

Referring to fig. 12-13, in the passive semi-automatic lifting table according to the third embodiment of the present invention, an upper frame 11 is fixed to the lower surface of the table plate 1. The upper frame 11 and the lower frame 5 are directly provided with a notch 110 and a notch 50 for sliding the slide wheel or a key groove 81 for sliding the slide part of the columnar structure at the corresponding positions of the slide part a2 and the slide part B2, respectively.

Referring to fig. 14-17, in the passive semi-automatic lifting table according to the fourth embodiment of the present invention, the scissor assembly 2 includes a pair of parallel rods a1 and a pair of parallel rods B1, the middle portions of the rods a1 and B1 are rotatably connected and axially fixed, and the middle portions of the rods a1 and B1 and the two ends of the rods a1 and a1, B1 and a B1 are respectively connected and fixed by rotating rollers 9. The rotating roller 9 includes a rotating shaft 91 and a pipe roller body 92 fitted around the rotating shaft. A bearing 93 is provided between the rotating shaft 91 and the tube roller body 92. Further, bearings 93 are fixed to both ends of the tube roller body 92. The tube roller 92 is welded and fixed with the rod a1 or the rod B1, and two ends of the rotating shaft 91 are respectively accommodated in the key-shaped groove 81 through the rod a1 or the rod B1 or are connected with the fixed sliding wheel through threads.

Referring to fig. 18, a passive semi-automatic lifting table according to a fifth embodiment of the present invention includes a pair of scissor assemblies 2 symmetrically disposed along the length direction of the lifting table. The same side ends of the rod A1 and the rod B1 are respectively and rotationally connected with the middle parts of the desk board 1 and the lower frame 5 and axially fixed.

Referring to fig. 19, in the passive semiautomatic lifting table according to the sixth embodiment of the present invention, 2 controllable gas springs 6 are symmetrically disposed and fixed at the inner side of the middle of the width-direction table leg 4.

Referring to fig. 20, in the passive semi-automatic lifting table according to the seventh embodiment of the present invention, the scissors assembly 2 is located between the table board 1 and the lower frame 5 and installed in the width direction of the lifting table. The scissor assembly 2 comprises two pairs of parallel rods A1 and two pairs of parallel rods B1, wherein the middle parts of the rods A1 and B1 are rotatably connected and axially fixed, the upper ends of one pair of rods A1 are hinged with the lower ends of the other pair of rods B1, and the upper ends of one pair of rods B1 are hinged with the lower ends of the other pair of rods A1. The upper ends of the pair of rods A1 and the lower ends of the other pair of rods B1 are respectively connected with the table plate 1 and the lower frame 5 in a rotating and axially fixed mode, and the upper ends of the pair of rods B1 and the lower ends of the other pair of rods A1 are provided with sliding portions B2 and sliding portions A2.

Referring to fig. 21, in the passive semi-automatic lifting table according to the eighth embodiment of the present invention, the scissor assembly 2 includes a pair of parallel rods a1 and a pair of parallel rods B1, the middle portions of the rods a1 and B1 are rotatably connected and axially fixed, the two ends of the rods a1 and B1 are respectively provided with a sliding portion a2 and a sliding portion B2, and the lower frame 5 and the table plate 1 are respectively fixed with a guide rail 7 or a sliding slot 8 which are respectively correspondingly matched with the sliding portion a2 and the sliding portion B2. The lower frame 5 is rotatably connected with a positioning rod 100 on a rod close to the inner side wall of the lower frame 5, and the positioning rod 100 is used for ensuring that the rotary connection point between the middle parts of the rod a1 and the rod B1 is always moved up and down in the movement process of the scissor assembly 2.

Referring to fig. 22, in the passive semi-automatic lifting table according to the ninth embodiment of the present invention, a position limiting member 200 for preventing the controllable gas spring 6 from swinging when the controllable gas spring 6 extends and contracts is fixedly connected to the lower frame 5 and the controllable gas spring 6. The limiting member 200 is a U-shaped structure.

Referring to fig. 23 to 24, in the passive semi-automatic lifting table according to the tenth embodiment of the present invention, a tension spring 300 for assisting the passive semi-automatic lifting table to ascend or descend is disposed between the cross bar A3 of the pair of parallel bars a1 and the cross bar B3 of the pair of parallel bars B1, or between the lower frame 5 and the cross bar A3, or between the lower frame 5 and the cross bar B3. The number of the tension springs 300 can be increased or decreased according to the actual use of the lifting process to achieve a better lifting effect.

Referring to fig. 25 to 26, in the passive semi-automatic lifting table according to the eleventh embodiment of the present invention, the table plate 1 or the scissors assembly 2 is connected to a vertically downward pedaling pulling portion 400, and the lifting table is lowered by the pedaling pulling portion 400 instead of a user applying a downward pressing force with hands, which is more convenient and labor-saving.

In other embodiments of the present invention, the legs 4 and the lower frame 5 can be fixed by welding or inserting. The transmission ropes of the controllable gas springs can be connected with the same rope puller, so that the telescopic synchronism of the controllable gas springs is better.

The passive semi-automatic lifting table is provided with the controllable gas spring, the upper end of a gas rod main body of the controllable gas spring is connected with the table top, the lower end of the gas rod main body is connected with the table legs or the lower frame, the table top is automatically driven to ascend when the gas rod main body is in a state of allowing expansion, the table top is pressed down when the gas rod main body descends, and the semi-automatic lifting is realized without a power supply; the scissor assembly is arranged between the table plate and the lower frame and has the characteristic of excellent synchronization performance, so that the table plate can be stable and good in performance when ascending and descending.

The utility model discloses an embodiment has set up the tension spring who is used for supplementary passive semi-automatic lift table to rise or descend between the horizontal pole of pole A and the horizontal pole of pole B or between underframe and the horizontal pole, and tension spring uses with controllable air spring cooperation can realize better lift effect, satisfies customer's user demand the most likely.

In an embodiment of the utility model, the table or the scissors subassembly is connected and is fixed with the foot that the perpendicular decurrent single-foot drive table descends and steps on the pulling portion, steps on the pulling portion through the foot and replaces the user to exert the power of pushing down to the table with the hand when the lift table descends, convenience more and laborsaving.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the present invention.

Claims (10)

1. A passive semi-automatic elevating table comprising: the table comprises a table plate, a scissor assembly, table legs, a lower frame and a controllable gas spring, wherein the table legs are fixedly connected with the lower frame, the scissor assembly is positioned between the table plate and the lower frame, the controllable gas spring comprises a gas rod main body and a control mechanism used for switching the allowable telescopic state and the limited telescopic state of the gas rod main body, and the scissor assembly is used for guiding the moving direction of the table plate.

2. The passive semi-automatic lifting table of claim 1, wherein the air rod body comprises a cylinder and a piston rod accommodated in the cylinder, and the control mechanism comprises a connecting seat fixed at an end of the piston rod, a valve needle accommodated in the piston rod, a pressing plate rotatably connected with the connecting seat for driving the valve needle to contract, a driving rope connected with the pressing plate, and a rope puller for driving the pressing plate through the driving rope.

3. The passive semi-automatic lifting table according to claim 1, wherein the scissor assembly comprises at least a pair of parallel rods a and B, the middle parts of the rods a and B are rotatably connected and axially fixed, one ends of the rods a and B are respectively rotatably connected and axially fixed with the table plate and the lower frame, the rods a and B are provided with sliding parts a and B, and the lower frame and the table plate are respectively fixed with a guide rail or a sliding chute which is correspondingly matched with the sliding parts a and B and transversely slides.

4. The passive semi-automatic lifting table according to claim 3, wherein an upper frame is fixedly connected to a lower surface of the table, and notches or key grooves for the sliding of the sliding portion A and the sliding portion B are respectively formed on corresponding side walls of the sliding portion A and the sliding portion B of the upper frame and the lower frame.

5. A passive semi-automatic lifting table according to claim 2 wherein the drive lines of the plurality of controllable gas springs are connected to the same rope puller.

6. The passive semi-automatic lifting table according to claim 1, wherein the scissor assemblies are symmetrically arranged along the length direction of the passive semi-automatic lifting table, the scissor assemblies comprise a pair of parallel rods A and a pair of parallel rods B, the middle parts of the rods A and B are rotatably connected and axially fixed, and the same side ends of the rods A and B are respectively rotatably connected and axially fixed with the middle parts of the table plate and the lower frame.

7. The passive semi-automatic lifting table according to claim 1, wherein the scissor assembly comprises at least a pair of parallel rods a and B, the middle portions of the rods a and B are rotatably connected and axially fixed, the two ends of the rods a and B are respectively provided with a sliding portion a and a sliding portion B, the lower frame and the table plate are respectively fixed with a guide rail or a sliding slot which is correspondingly matched with the sliding portion a and the sliding portion B, respectively, and the side wall of the lower frame and the side wall of the rod a or the rod B close to the inner side wall of the lower frame are rotatably connected with a positioning rod for ensuring that the middle rotating connection point of the rods a and B is always vertically movable during the movement of the scissor assembly.

8. The passive semi-automatic lifting table according to claim 3, wherein cross bars are respectively connected and fixed between the bar A and the other bar A, and between the bar B and the other bar B, and a tension spring for assisting the passive semi-automatic lifting table to ascend or descend is arranged between the cross bar of the bar A and the cross bar of the bar B or between the lower frame and the cross bar.

9. The passive semi-automatic lifting table as claimed in claim 1, wherein the table plate or the scissors assembly is fixedly connected with a vertically downward pedal pulling part which is driven by a single foot of a user to descend the table plate.

10. A passive semi-automatic lifting table according to any one of claims 1 to 9, wherein the lower frame is fixed with a limit stop at a position corresponding to the controllable gas spring for preventing the controllable gas spring from swinging when the controllable gas spring is extended or retracted.

Images