CN107890202B - Lifting locking device for table and chair legs - Google Patents
Lifting locking device for table and chair legs Download PDFInfo
- Publication number
- CN107890202B CN107890202B CN201711119337.4A CN201711119337A CN107890202B CN 107890202 B CN107890202 B CN 107890202B CN 201711119337 A CN201711119337 A CN 201711119337A CN 107890202 B CN107890202 B CN 107890202B
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- winding shaft
- fixed
- steel wire
- rope
- chair
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/12—Tables with tops of variable height with flexible height-adjusting means, e.g. rope, chain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2200/00—General construction of tables or desks
- A47B2200/0035—Tables or desks with features relating to adjustability or folding
- A47B2200/005—Leg adjustment
- A47B2200/0051—Telescopic
- A47B2200/0052—Telescopic with two telescopic parts
- A47B2200/0053—Flat lifting device for desks with two telescopic sections
Abstract
The invention discloses a lifting locking device for table and chair legs, belonging to the technical field of table and chair equipment.A supporting leg comprises an outer supporting column and an inner supporting column which can be drawn and connected in a plug-in manner, and a locking mechanism is arranged between the lower end of the outer supporting column and the inner supporting column; a pre-tightening spring is arranged between the upper end of the inner support and the bottom surface of the desk and chair panel, a steel wire rope is fixed at the upper end of the inner support, and the other end of the steel wire rope penetrates through the upper part of the outer support, passes through the synchronous rope combining mechanism and is finally accommodated in the rope collecting driving mechanism; the rope collecting driving mechanism comprises a second winding shaft and a second fixed cylinder body sleeved outside the second winding shaft in a clearance type, and the tail end of the second winding shaft is connected with the rocking handle; the synchronous rope combining mechanism comprises a large gear and four small gears which are uniformly meshed with the surface of the large gear, the small gears are fixedly sleeved at one end of a winding shaft, and a fixed cylinder is sleeved outside the winding shaft in a clearance type. The lifting adjustment of the desk and chair panel is carried out from top to bottom, so that the labor is saved and the convenience is realized; the synchronous operation of the four support legs is effectively guaranteed; and the structure design is ingenious, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of table and chair equipment, in particular to a lifting locking device for table and chair legs.
Background
A great number of lifting tables are used in European and American countries, and the lifting tables are commonly used for learning, working, surfing the internet and the like. But also gradually accept and begin to be widely applied in China. The utility model has the value of helping office people to take a sedentary position and realizing standing office. Through the research and discovery of the development history of the furniture in the world by researchers: people find that the sitting is beneficial to relieving fatigue in daily activities after walking upright, thereby inventing the seat. The mode of working while sitting is carried over, but as the time of working while sitting is longer and longer, people gradually realize that sitting for a long time is unfavorable for improving the working efficiency, people begin to try to work alternately in standing, gradually the lifting table is appeared, and the standing type working by using the lifting table becomes a popular healthy working mode. Whether the long-time sitting office work or the long-time standing office work has bad physiological influence on human bodies, the sitting-standing alternative office work is the most scientific and healthier office work mode, and the sitting-standing alternative office work can lead the great change of healthy office work. Accordingly, lift chairs are also becoming more widely used. The lifting chair can adapt to people with different heights to use in sitting or standing positions, has reasonable structure, convenient use and simple operation, is suitable for occasions such as schools, families, offices, studios and the like, is beneficial to the health of human eyes and spines, and is beneficial to improving the learning and working efficiency. The lifting table and chair generally realize the lifting function by the supporting legs of the lifting column structure, and also comprises a locking device which can be positioned at various heights.
At present, a common supporting leg of a lifting structure comprises an inner supporting column and an outer supporting column, the outer supporting column is in contact with the ground, the inner supporting column is connected to the upper end of the outer supporting column, the upper end of the inner supporting column is connected with a table and chair panel, and a locking device is arranged between the outer supporting column and the inner supporting column. When lifting and adjusting, the locking devices are opened one by one and the inner support columns are extracted upwards, and the adjustment process is laborious and inconvenient because the inner support columns are pressurized by the gravity of the desk and chair panels; the height of each landing leg is separately adjusted one by one like this, and lift adjustment process is slower, and the roughness in the table chair panel adjustment process is difficult to keep.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to solve the technical problem of providing a lifting locking device for table and chair legs, which can adjust the lifting of a table and chair panel from top to bottom and has the advantages of labor saving and convenience; the synchronous operation of the four support legs is effectively guaranteed, and the lifting adjustment of the table and chair panel and the flatness maintenance in the table and chair panel adjusting process are accelerated; and the structure design is ingenious, and the operation is convenient.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
a lifting locking device for table and chair legs comprises a table and chair panel and four supporting legs respectively fixed on four corners of the bottom surface of the table and chair panel, wherein the supporting legs comprise an outer support and an inner support which can be drawn and inserted into each other, the lower end of the inner support is in contact with the ground, the outer support is connected to the upper end of the inner support, the upper end of the outer support is fixed on the bottom surface of the table and chair panel, and a locking mechanism is arranged between the lower end of the outer support and the inner support; a pre-tightening spring is arranged between the upper end of the inner post and the bottom surface of the desk and chair panel, a steel wire rope parallel to the pre-tightening spring is fixed at the upper end of the inner post, the other end of the steel wire rope passes through the side wall of the upper part of the outer post, passes through the synchronous rope combining mechanism and is finally accommodated in the rope collecting driving mechanism,
the synchronous rope combining mechanism comprises a large gear and four small gears which are uniformly meshed with the surface of the large gear, the small gears are fixedly sleeved at one end of a winding shaft, a fixed cylinder is sleeved outside the winding shaft in a clearance type, the small gears are positioned outside the fixed cylinder, external threads and internal threads which are matched with each other but not meshed with each other are respectively arranged on the outer surface of the winding shaft and the inner surface of the fixed cylinder, and anti-skidding nicks are arranged on the convex surfaces of the external threads; the steel wire rope enters the corresponding fixed cylinder from one end of the corresponding winding shaft, is wound on the winding shaft along the convex surface of the external thread, and finally penetrates out of the corresponding fixed cylinder from the other end of the winding shaft;
the rope collecting driving mechanism comprises a second winding shaft, a second fixed barrel, a take-up reel and a rocking handle, the assembly structure of the second winding shaft and the second fixed barrel is consistent with that of the second winding shaft and the fixed barrel, the two tail ends of the fixed barrel are connected to the take-up reel, a rotating shaft penetrating through the take-up reel is fixedly connected to the two tail ends of the second winding shaft, the other end of the rotating shaft is bent into a right-angle shape, the rocking handle is connected to the right-angle end of the rotating shaft through a connecting rod, the rocking handle is located on one side, opposite to the take-up reel, of the connecting rod, the connecting mode between the rocking handle and the connecting rod is movable connection, at least 4 locking grooves capable of being clamped with the rocking handle are uniformly formed in one side, facing the rocking handle, of the take-up reel, of the connecting rod; the four steel wire ropes penetrate through the corresponding fixed cylinder and then are twisted into one thick steel wire rope, then enter the second fixed cylinder from one end of the second winding shaft opposite to the take-up reel, are wound on the second winding shaft along the convex surface of the external thread of the second winding shaft, and finally are stored in the take-up reel;
the specific installation structure of the synchronous rope combining mechanism is as follows: the four fixing cylinders are vertically arranged, the top ends of the four fixing cylinders are fixed to the middle of the bottom surface of the table and chair panel, the small gear is located right below the fixing cylinders, the bearing plate is arranged below the large gear and the small gear, a central shaft penetrating through the center of the large gear is vertically fixed at the center of the upper surface of the bearing plate, and the upper end of the central shaft is directly fixed to the bottom surface of the table and chair panel or is connected to the fixing cylinders through a second connecting rod; and four strands of steel wire ropes respectively enter from the lower end of the peripheral side of the corresponding fixed cylinder body, penetrate out from the upper end of the inner peripheral side of the fixed cylinder body, and are then gathered on the central line of the synchronous rope twisting mechanism to be twisted together. The synchronous rope combining mechanism is fixed in the middle of the bottom surface of the desk and chair panel, so that the balance of the traction effect between each steel wire rope and the supporting leg is facilitated, and the synchronization of the lifting actions of the four supporting legs is facilitated; then the fixed cylinder is vertically arranged to facilitate the entering and the coming out of four steel wire ropes, the gear and the winding shaft can be prevented from falling down by adopting a bearing plate and a central shaft structure, the related structural relation is ensured, and the moving requirements of the gear and the winding shaft are met; the threading mode of the steel wire rope is beneficial to preventing disorder and facilitating threading, winding and transition of the steel wire rope; the concrete mounting structure of collection rope actuating mechanism does: the fixed cylinder II is transversely arranged, the side face of the fixed cylinder II is fixed on the side edge of one side of the bottom face of the table and chair panel, and the rocking handle is positioned on the outer side of the table and chair panel; and the twisted thick steel wire rope enters the second fixed cylinder from the second fixed cylinder towards one end of the synchronous rope twisting mechanism. So set up, convenient to use person operates, also is convenient for wire rope's the process of reeving.
As an improvement to the above scheme, one side of each of the support legs is provided with a wire wheel mechanism, the wire wheel mechanism comprises a winding shaft wheel, a fixed block and a connecting rod clamped at two ends of the winding shaft wheel and connected with the fixed block, and the fixed block is fixed on the bottom surface of a table and chair panel; the steel wire rope firstly rounds the corresponding winding shaft wheel after passing through the side wall of the upper part of the outer support and then is connected into the synchronous rope combining mechanism. The winding shaft wheel can play a limiting and guiding role on the steel wire rope, and is favorable for promoting the traction or the relaxation process of the steel wire rope.
Furthermore, the locking mechanism comprises an annular sleeve surrounding the outer side of the inner support, vertical strip-shaped openings are uniformly formed in the periphery of the annular sleeve, the upper ends of the strip-shaped openings are sealed, the lower ends of the strip-shaped openings extend to the lower end of the annular sleeve and are opened, nuts are sleeved on the annular sleeve, and threads matched with the outer surface of the annular sleeve and the inner surface of the nuts are arranged on the outer surface of the annular sleeve. The strip-shaped opening enables the caliber of the annular sleeve to have a fine adjustment function; the annular sleeve can be tightened or loosened by screwing or unscrewing the nut so as to realize locking or loosening between the outer support and the inner support, and the structure is simple and easy to control.
3. Advantageous effects
(1) The support legs are designed into an outer support and an inner support which can be connected in a pulling and inserting manner, and the outer support is connected with the upper end of the inner support; a pre-tightening spring is arranged between the upper end of the inner support and the bottom surface of the desk and chair panel, and a steel wire rope parallel to the pre-tightening spring is fixed at the upper end of the inner support. In practical application, a user can lower the outer column by pulling the other end of the steel wire rope, so that the function of lowering the table and chair panel is realized conveniently; the other end of the steel wire rope is loosened, and under the action of the pre-tightening spring, the desk and chair panel is lifted upwards to tighten the steel wire rope (the pre-tightening spring is always in a compression state in an adjusting range), so that the lifting function of the desk and chair panel is realized. Therefore, the height of the table and chair panel is adjusted from top to bottom by controlling the steel wire rope, and the steel wire rope is controlled by the rotating handle, so that the table and chair has the advantages of labor saving and convenience.
(2) The invention controls a steel wire rope through a rope collecting driving mechanism, wherein the rope collecting driving mechanism comprises a second winding shaft and a second fixed cylinder body sleeved outside the second winding shaft in a clearance mode, the outer surface of the second winding shaft and the inner surface of the second fixed cylinder body are respectively provided with an external thread and an internal thread which are matched with each other but are not meshed with each other, and a thick steel wire rope enters the second fixed cylinder body and then is wound on the second winding shaft along the surface of the external thread and finally is stored in a take-up reel; the two tail ends of the winding shaft are fixedly connected with a rotating shaft penetrating through the take-up reel, and the shaking handle is connected to the free end of the rotating shaft through a connecting rod. In practical application, rotate and wave the handle, can drive pivot and two rotations of spool to make wire rope remove in to the take-up reel, realize tractive wire rope's effect promptly, the reversal waves the handle and can relax wire rope. The structural design is ingenious, and the operation is convenient.
(3) The synchronous rope-closing mechanism is arranged in front of the rope-collecting driving mechanism, the winding shaft and the fixed cylinder which are consistent with the assembly structure of the winding shaft II and the fixed cylinder II are arranged in the synchronous rope-closing mechanism, the synchronous rope-closing mechanism can assist in controlling and dragging a steel wire rope, the winding shaft and a small gear fixed at one end of the winding shaft are driven to rotate by the dragging of the steel wire rope, the small gear drives a large gear meshed with the small gear to rotate, the four small gears are evenly meshed with the outer surface of the large gear, and the large gear also has a driving effect on the small gear, so that the four small gears can obtain synchronous and equal movement effects. And the wire spools that four pinions correspond connect the wire rope on the landing leg of correspondence respectively, so effectively ensured the synchronous operation of four landing legs, be convenient for accelerate the lift adjustment of table chair panel, and be favorable to improving the roughness among the table chair panel accommodation process and keep.
(4) The connection mode between the rocking handle and the connecting rod is set as movable connection, at least 4 locking grooves capable of being clamped with the rocking handle are uniformly formed in one side of the take-up reel, which faces the rocking handle, and the distance between the center of the connecting rod and the center of the rotating shaft is equal to the distance between the locking grooves and the center of the rotating shaft. In practical application, after the rocking handle rotates to the position, the rocking handle is pressed to the end where the rotating shaft is located, the rocking handle is enabled to be opposite to the locking groove position, then the rocking handle rotates to one side where the take-up reel is located around the connecting rod, the free end of the rocking handle is clamped in the locking groove, and fixation of the rocking handle can be achieved, namely locking of a steel wire rope state is achieved. And a locking mechanism is arranged between the lower end of the outer support and the inner support, so that the locking or the loosening of the state between the outer support and the inner support can be realized, and the locking function of the desk and chair panel can be completely realized. The structural design is ingenious, and the operation is convenient.
In conclusion, the desk and chair panel lifting adjustment is carried out from top to bottom, and the desk and chair panel lifting adjustment device has the advantages of labor saving and convenience; the synchronous operation of the four support legs is effectively guaranteed, and the lifting adjustment of the table and chair panel and the flatness maintenance in the table and chair panel adjusting process are accelerated; and the structure design is ingenious, and the operation is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention with the front panel 40 of the table and chair removed;
FIG. 3 is a schematic longitudinal sectional view of the bobbin 13 and the fixing cylinder 14;
fig. 4 is a sectional view of the internal structure of the rope catch driving mechanism 20;
fig. 5 is a top view of the synchronous rope closing mechanism 10;
fig. 6 is a schematic structural view of a section a-a in fig. 5.
Wherein, 1-outer column, 2-inner column, 3-pretension spring, 4-steel wire rope, 5-thick steel wire rope, 10-synchronous rope combining mechanism, 11-big gear, 12-small gear, 13-winding shaft, 14-fixed cylinder, 15-external thread, 16-internal thread, 17-supporting plate, 18-central shaft, 19-connecting rod II, 20-rope collecting driving mechanism, 21-winding shaft II, 22-fixed cylinder II, 23-take-up reel, 24-rocking handle, 25-rotating shaft, 26-connecting rod, 27-locking groove, 30-supporting leg, 40-table and chair panel, 50-locking mechanism, 51-annular sleeve, 52-strip port, 53-nut, 60-wire wheel mechanism, 61-winding shaft wheel, 62-fixed block and 63-connecting rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
As shown in fig. 1 and 2, the lifting locking device for table and chair legs comprises a table and chair panel 40 and four support legs 30 fixed at four corners of the bottom surface of the table and chair panel, respectively, wherein the support legs 30 comprise an outer support 1 and an inner support 2 which are connected in a drawable and plug-in manner, the lower end of the inner support 2 contacts the ground, the outer support 1 is connected to the upper end of the inner support 2, the upper end of the outer support 1 is fixed at the bottom surface of the table and chair panel 40, and a locking mechanism 50 is arranged between the lower end of the outer support 1 and the inner support; a pre-tightening spring 3 is arranged between the upper end of the inner post 2 and the bottom surface of the table and chair panel 40, a steel wire rope 4 parallel to the pre-tightening spring 3 is fixed at the upper end of the inner post 2, the other end of the steel wire rope 4 passes through the side wall of the upper part of the outer post 1, passes through the synchronous rope combining mechanism 10 and is finally accommodated in the rope collecting driving mechanism 20,
the synchronous rope combining mechanism 10 comprises a large gear 11 and four small gears 12 uniformly meshed with the surface of the large gear 11, the small gears 12 are fixedly sleeved at one end of a winding shaft 13, as shown in fig. 3, a fixed cylinder 14 is sleeved outside the winding shaft 13 in a clearance manner, the small gears 12 are positioned outside the fixed cylinder 14, external threads 15 and internal threads 16 which are matched with each other but not meshed are respectively arranged on the outer surface of the winding shaft 13 and the inner surface of the fixed cylinder 14, and anti-skid nicks are arranged on the convex surface of the external threads 15; the steel wire rope 4 enters the corresponding fixed cylinder 14 from one end of the corresponding winding shaft 13, is wound on the winding shaft 13 along the convex surface of the external thread 15, and finally penetrates out of the corresponding fixed cylinder 14 from the other end of the winding shaft 13;
the rope collecting driving mechanism 20 comprises a second winding shaft 21, a second fixed cylinder 22, a take-up reel 23 and a rocking handle 24, as shown in fig. 4, the assembly structure of the second bobbin 21 and the second fixed cylinder 22 is the same as the assembly structure of the bobbin 13 and the fixed cylinder 14, the tail end of the second fixed cylinder 22 is connected to the take-up reel 23, the tail end of the second winding shaft 21 is fixedly connected with a rotating shaft 25 penetrating through the take-up reel 23, the other end of the rotating shaft 25 is bent into a right-angle shape, the shaking handle 24 is connected to the right-angle end of the rotating shaft 25 through a connecting rod 26, the shaking handle 24 is positioned at one side of the connecting rod 26 opposite to the take-up reel 23, the connection mode between the rocking handle 24 and the connecting rod 26 is flexible connection, at least 4 locking grooves 27 capable of being clamped with the rocking handle 24 are uniformly arranged on one side of the take-up reel 23 facing the rocking handle 24, the distance between the center of the connecting rod 26 and the center of the rotating shaft 25 is equal to the distance between the locking groove 27 and the center of the rotating shaft 25; the four steel wire ropes 4 penetrate through the corresponding fixed cylinder 14 and then are twisted into one thick steel wire rope 5, then enter the second fixed cylinder 22 from one end of the second winding shaft 21 opposite to the take-up reel 23, are wound on the second winding shaft 21 along the convex surface of the external thread of the second winding shaft 21, and finally are accommodated in the take-up reel 23.
In order to better control the wire rope 4, a wire guide wheel mechanism 60 is respectively arranged on one side of each supporting leg 30, the wire guide wheel mechanism 60 comprises a winding shaft wheel 61, a fixing block 62 and a connecting rod 63 clamped at two ends of the winding shaft wheel 61 and connected with the fixing block 62, and the fixing block 62 is fixed on the bottom surface of the table and chair panel 40; the wire rope 4 passes through the upper side wall of the outer post 1, then bypasses the corresponding reel 61 and is connected to the synchronous rope combining mechanism 10. The winding shaft wheel 61 can play a limiting and guiding role in the steel wire rope 4, and is beneficial to promoting the traction or relaxation process of the steel wire rope 4. In addition, in order to facilitate pulling the steel wire rope 4 more conveniently in the process of lifting and adjusting the desk and chair panel 40, a rotating handle can be fixed on the winding shaft wheel 61, so that the steel wire rope 4 can be pulled conveniently. At this time, attention is paid to winding the wire rope 4 once around the reel 61.
In this embodiment, the locking mechanism 50 includes an annular sleeve 51 surrounding the outer side of the inner pillar 2, a vertical strip-shaped opening 52 is uniformly arranged around the annular sleeve 51, the upper end of the strip-shaped opening 52 is closed, the lower end of the strip-shaped opening 52 extends to the lower end of the annular sleeve 51 and is opened, a nut 53 is sleeved on the annular sleeve 51, and the outer surface of the annular sleeve 51 and the inner surface of the nut 53 are provided with matched threads. The strip-shaped opening 52 enables the caliber of the annular sleeve 51 to have a fine adjustment function; by screwing or unscrewing the nut 53, the annular sleeve 51 can be tightened or loosened to realize locking or loosening between the outer pillar 1 and the inner pillar 2, and the structure is simple and easy to control.
In this embodiment, the specific installation structure of the synchronous rope-closing mechanism 10 is as follows: the four fixed cylinders 14 are vertically arranged, the top ends of the four fixed cylinders are fixed to the middle of the bottom surface of the table and chair panel 40, the pinion 12 is located right below the fixed cylinders 14, as shown in fig. 5 and 6, a support plate 17 is arranged below the bull gear 11 and the pinion 12, a central shaft 18 penetrating through the center of the bull gear 11 is vertically fixed at the center of the upper surface of the support plate 17, and the upper end of the central shaft 18 is directly fixed to the bottom surface of the table and chair panel 40 or is connected to the fixed cylinders 14 through a second connecting rod 19; the four steel wire ropes 4 respectively enter from the lower end of the peripheral side of the corresponding fixed cylinder 14, penetrate out from the upper end of the inner peripheral side of the fixed cylinder 14, and are gathered on the central line of the synchronous rope-combining mechanism 10 to be combined and twisted. The synchronous rope combining mechanism 10 is fixed in the middle of the bottom surface of the table and chair panel 40, so that the balance of the traction action between each steel wire rope 4 and the supporting legs 30 is facilitated, and the synchronization of the lifting actions of the four supporting legs 30 is facilitated; then the fixed cylinder 14 is vertically arranged to facilitate the four steel wire ropes 4 to enter and exit, and the bearing plate 17 and the central shaft 18 are adopted to prevent the gear and the winding shaft 13 from falling off, so that the related structural relation is ensured, and the movement requirements of the gear and the winding shaft 13 are met; the threading mode of the steel wire rope 4 is beneficial to preventing disorder and facilitating the threading and the transition of the steel wire rope 4.
In this embodiment, the concrete installation structure of the rope-collecting driving mechanism 20 is: the fixed cylinder II 22 is transversely arranged, the side face of the fixed cylinder II is fixed on one side edge of the bottom face of the table and chair panel 40, and the rocking handle 24 is positioned on the outer side of the table and chair panel 40; the twisted thick steel wire rope 5 enters the second fixed cylinder 22 from the second fixed cylinder 22 towards one end of the synchronous rope twisting mechanism 10. So set up, the user operation of being convenient for also is convenient for wire rope 4's the process of reeving.
The specific application process of the lifting locking device of the table and chair legs is as follows:
(1) reduce the height of table chair panel 40: after the four nuts 53 are loosened, the shaking handle 24 is rotated to drive the rotating shaft 25 to rotate, the rotating shaft 25 drives the second winding shaft 21 to rotate, the thick steel wire rope 5 rotates along with the convex surface of the external thread on the second winding shaft 21 and moves to the take-up reel 23, and the effect of tensioning the thick steel wire rope 5 is achieved; the thick steel wire rope 5 tensions the steel wire rope 4 (stranding), the steel wire rope 4 pulls the winding shaft 13 and the small gear 12 fixed at one end of the winding shaft 13 to rotate, the small gear 12 drives the large gear 11 meshed with the small gear to rotate, the four small gears 12 are evenly meshed with the outer surface of the large gear 11, the large gear 11 also has a driving effect on the small gears 12, and therefore the four small gears 12 can obtain synchronous and equal movement effects; the winding shafts 13 corresponding to the four pinions 12 are respectively connected with the steel wire ropes 4 on the corresponding supporting legs 30, and the steel wire ropes 4 in the supporting legs 30 are tightened to press the outer supporting column 1 downwards; when the target height is reached, the end of the rotating shaft 25 is pressed to press the rocking handle 24 to enable the rocking handle to be opposite to the position of the locking groove 27, then the rocking handle 24 is turned to the side where the take-up reel 23 is located around the connecting rod 29, and the free end of the rocking handle 24 is clamped in the locking groove 27, namely the state of locking and fixing the steel wire rope 4 is realized; then the nuts 53 on the four legs 30 are tightened one by one to tightly press the annular sleeve 51 against the inner post 2, i.e. to lock the outer post 1 and the inner post 2. The descending adjustment and locking of the desk and chair panel 40 are completed.
(2) Height of the table and chair panel 40 is raised: after the four nuts 53 are loosened, the handle 24 is shaken along with the reverse rotation to drive the rotating shaft 25 to rotate, the rotating shaft 25 drives the second winding shaft 21 to rotate, the thick steel wire rope 5 rotates along with the convex surface of the external thread on the second winding shaft 21, and the thick steel wire rope 5 in the take-up reel 23 moves outwards to achieve the effect of loosening the thick steel wire rope 5; the thick steel wire rope 5 loosens the steel wire rope 4 (split), and pulls one end of the steel wire rope 4 connected with the supporting leg 30 to drive the winding shaft 13 and the pinion 12 fixed at one end of the winding shaft 13 to rotate, so that the four pinions 12 can obtain synchronous and equal motion effects as described above; the winding shafts 13 corresponding to the four pinions 12 are respectively connected with the steel wire ropes 4 on the corresponding supporting legs 30, the steel wire ropes 4 in the supporting legs 30 are loosened, and under the reset action of the pre-tightening springs 3, the table and chair panel 40 is jacked upwards to pull the outer column 1 to rise; when the steel wire rope 4 is loosened enough, the free end of the shaking handle 24 is clamped in the locking groove 27 as described above, namely, the steel wire rope 4 is locked and fixed; then the nuts 53 on the four legs 30 are tightened one by one to tightly press the annular sleeve 51 against the inner post 2, i.e. to lock the outer post 1 and the inner post 2. The lifting adjustment and locking of the table and chair panel 40 are completed.
Therefore, the lifting adjustment of the table and chair panel is carried out from top to bottom, and the table and chair has the advantages of labor saving and convenience; the synchronous operation of the four support legs is effectively guaranteed, and the lifting adjustment of the table and chair panel and the flatness maintenance in the table and chair panel adjusting process are accelerated; and the structure design is ingenious, and the operation is convenient.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (3)
1. A lifting locking device for table and chair legs comprises a table and chair panel (40) and four supporting legs (30) fixed on four corners of the bottom surface of the table and chair panel respectively, and is characterized in that the supporting legs (30) comprise an outer support (1) and an inner support (2) which can be in pull-push plug-in connection, the lower end of the inner support (2) is contacted with the ground, the outer support (1) is connected to the upper end of the inner support (2), the upper end of the outer support (1) is fixed on the bottom surface of the table and chair panel (40), and a locking mechanism (50) is arranged between the lower end of the outer support (1) and the inner support (2; a pre-tightening spring (3) is arranged between the upper end of the inner post (2) and the bottom surface of the desk and chair panel (40), a steel wire rope (4) parallel to the pre-tightening spring (3) is fixed at the upper end of the inner post (2), the other end of the steel wire rope (4) penetrates through the side wall of the upper part of the outer post (1), passes through the synchronous rope combining mechanism (10) and is finally accommodated in the rope collecting driving mechanism (20),
the synchronous rope combining mechanism (10) comprises a large gear (11) and four small gears (12) which are uniformly meshed with the surface of the large gear (11), the small gears (12) are fixedly sleeved at one end of a winding shaft (13), a fixed cylinder (14) is sleeved outside the winding shaft (13) in a clearance mode, the small gears (12) are located outside the fixed cylinder (14), external threads (15) and internal threads (16) which are matched with each other but not meshed with each other are respectively arranged on the outer surface of the winding shaft (13) and the inner surface of the fixed cylinder (14), and anti-skidding nicks are arranged on the convex surfaces of the external threads (15); the steel wire rope (4) enters the corresponding fixed barrel (14) from one end of the corresponding winding shaft (13), is wound on the winding shaft (13) along the convex surface of the external thread (15), and finally penetrates out of the corresponding fixed barrel (14) from the other end of the winding shaft (13);
rope collection actuating mechanism (20) is including spool two (21), fixed barrel two (22), take-up reel (23) and wave handle (24), the assembly structure of spool two (21) and fixed barrel two (22) is unanimous with the assembly structure of spool (13) and fixed barrel (14), fixed barrel two (22) end-to-end connection is on take-up reel (23), spool two (21) end-to-end fixedly connected with passes pivot (25) of take-up reel (23), the pivot (25) other end is crooked to the right angle shape, wave handle (24) and connect in pivot (25) right angle end through connecting rod (26), wave handle (24) and be located connecting rod (26) and take-up reel (23) relative one side, and wave the connected mode between handle (24) and connecting rod (26) and be swing joint, take-up reel (23) evenly are equipped with at least 4 one side of shaking handle (24) towards shaking one side of shaking handle (24) and can with the block handle (24) block The distance between the center of the connecting rod (26) and the center of the rotating shaft (25) is equal to the distance between the locking groove (27) and the center of the rotating shaft (25); the four steel wire ropes (4) penetrate through the corresponding fixed cylinder (14) and then are twisted into one thick steel wire rope (5), then enter the fixed cylinder II (22) from one end of the second winding shaft (21) opposite to the take-up reel (23), are wound on the second winding shaft (21) along the convex surface of the external thread of the second winding shaft (21), and finally are accommodated in the take-up reel (23);
the four fixed cylinders (14) are vertically arranged, the top ends of the four fixed cylinders are fixed to the middle of the bottom surface of a table and chair panel (40), the small gear (12) is located right below the fixed cylinders (14), a bearing plate (17) is arranged below the large gear (11) and the small gear (12), a central shaft (18) penetrating through the center of the large gear (11) is vertically fixed to the center of the upper surface of the bearing plate (17), and the upper end of the central shaft (18) is directly fixed to the bottom surface of the table and chair panel (40) or is connected to the fixed cylinders (14) through a second connecting rod (19); the four steel wire ropes (4) respectively enter from the lower end of the peripheral side of the corresponding fixed cylinder (14), penetrate out from the upper end of the inner peripheral side of the fixed cylinder (14), and are then gathered on the central line of the synchronous rope twisting mechanism (10) to be twisted together; the fixed cylinder II (22) is transversely arranged, the side face of the fixed cylinder II is fixed on one side edge of the bottom face of the table and chair panel (40), and the rocking handle (24) is positioned on the outer side of the table and chair panel (40); and the twisted thick steel wire rope (5) enters the second fixed cylinder (22) from the second fixed cylinder (22) towards one end of the synchronous rope twisting mechanism (10).
2. The lifting locking device for the table and chair legs as claimed in claim 1, wherein a wire wheel mechanism (60) is respectively arranged on one side of each leg (30), the wire wheel mechanism (60) comprises a winding shaft wheel (61), a fixing block (62) and a connecting rod (63) clamped at two ends of the winding shaft wheel (61) and connected with the fixing block (62), and the fixing block (62) is fixed on the bottom surface of the table and chair panel (40); the steel wire rope (4) firstly rounds the corresponding winding shaft wheel (61) after passing through the side wall of the upper part of the outer post (1) and then is connected into the synchronous rope combining mechanism (10).
3. The lifting locking device for the table and chair legs as claimed in claim 1, wherein the locking mechanism (50) comprises an annular sleeve (51) surrounding the outer side of the inner support column (2), a vertical strip-shaped opening (52) is uniformly formed in the periphery of the annular sleeve (51), the upper end of the strip-shaped opening (52) is closed, the lower end of the strip-shaped opening (52) extends to the lower end of the annular sleeve (51) and is opened, a nut (53) is sleeved on the annular sleeve (51), and the outer surface of the annular sleeve (51) and the inner surface of the nut (53) are provided with matched threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711119337.4A CN107890202B (en) | 2017-11-14 | 2017-11-14 | Lifting locking device for table and chair legs |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711119337.4A CN107890202B (en) | 2017-11-14 | 2017-11-14 | Lifting locking device for table and chair legs |
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| CN107890202A CN107890202A (en) | 2018-04-10 |
| CN107890202B true CN107890202B (en) | 2020-07-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108741625A (en) * | 2018-06-28 | 2018-11-06 | 浙江乐歌智能驱动科技有限公司 | A kind of rotary booster engine structure and its same table of application |
| CN108937110A (en) * | 2018-08-17 | 2018-12-07 | 尹宏 | A kind of drawstring control push rod, lifting table leg and same table |
| CN110169650B (en) * | 2019-06-03 | 2022-04-08 | 尹宏 | Lifting table |
| CN111085400B (en) * | 2020-01-15 | 2021-07-23 | 天通精电新科技有限公司 | Dispensing system of PCB |
| CN112369814B (en) * | 2020-11-13 | 2021-09-17 | 江西万友实业有限公司 | Retractable tablet chair convenient for classroom cleaning |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085746A (en) * | 2014-06-10 | 2014-10-08 | 国家电网公司 | Take-up device for instrument device |
| CN106723957A (en) * | 2016-11-18 | 2017-05-31 | 山东科技职业学院 | Automatic lifting secretaire |
| CN107198348A (en) * | 2017-04-19 | 2017-09-26 | 南通市久正人体工学股份有限公司 | A kind of mechanical ascending and descending table and lift adjustment method |
| CN107259791A (en) * | 2017-07-31 | 2017-10-20 | 邓海运 | A kind of suitable notebook computer Multifunctional desk |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2450961Y (en) * | 2000-11-14 | 2001-10-03 | 苏文法 | Chair arms with lifting and lowering regulating structure |
| CN2588854Y (en) * | 2002-12-17 | 2003-12-03 | 杨宇轩 | Adjustable desk and table |
| CN101120837A (en) * | 2007-04-19 | 2008-02-13 | 张亚泉 | Lifting device for desk and chair |
| JP5897560B2 (en) * | 2010-06-11 | 2016-03-30 | エシコン・エルエルシーEthicon, LLC | Suture dispenser and system for delivering sutures |
| CN104510177A (en) * | 2013-12-07 | 2015-04-15 | 罗浪平 | Optionally-lifted student desk and chair |
| CN104754431A (en) * | 2013-12-25 | 2015-07-01 | 富泰华工业（深圳）有限公司 | Wire winding device |
| CN206166177U (en) * | 2016-07-13 | 2017-05-17 | 汪亚君 | Utensil air spring tilt mechanism's study table |
| CN107252186B (en) * | 2017-04-19 | 2020-03-17 | 南通市久正人体工学股份有限公司 | Mechanical three-leg automatic lifting table and adjusting method thereof |
-
2017
- 2017-11-14 CN CN201711119337.4A patent/CN107890202B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085746A (en) * | 2014-06-10 | 2014-10-08 | 国家电网公司 | Take-up device for instrument device |
| CN106723957A (en) * | 2016-11-18 | 2017-05-31 | 山东科技职业学院 | Automatic lifting secretaire |
| CN107198348A (en) * | 2017-04-19 | 2017-09-26 | 南通市久正人体工学股份有限公司 | A kind of mechanical ascending and descending table and lift adjustment method |
| CN107259791A (en) * | 2017-07-31 | 2017-10-20 | 邓海运 | A kind of suitable notebook computer Multifunctional desk |
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Effective date of registration: 20200527 Address after: 311300 No.2 Qinglin street, Yaguan village, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Applicant after: HANGZHOU HUAYU EDUCATION EQUIPMENT Co.,Ltd. Address before: 252000 No. 11 Longshan West Street, Dongchangfu District, Shandong, Liaocheng Applicant before: Zhang Yujing |
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Address after: 311300 No. 2, Qinglin street, Yaguan village, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Huayu Furniture Industry Co.,Ltd. Address before: 311300 No. 2, Qinglin street, Yaguan village, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU HUAYU EDUCATION EQUIPMENT Co.,Ltd. |
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