Lifting device for lifting table and lifting table

Abstract

The utility model relates to a lifting device for a lifting table. The lifting device comprises a supporting seat assembly; the driving rod is linked with the handle and can be driven by the handle to move downwards; the supporting rod assembly comprises at least one supporting rod with the telescopic and adjustable length, each supporting rod comprises a locking assembly and an operation part, the operation part is arranged at the upper end of the supporting rod and used for controlling the locking assembly to be switched between the locking state and the unlocking state, and when the locking assembly is in the locking state, the length of the supporting rod cannot be adjusted in a telescopic mode; when the locking assembly is in the unlocking state, the length of the supporting rod can be adjusted in a telescopic mode, the upper end of the supporting rod is connected with the supporting base and stretches into the movable cavity to be matched with the driving rod, the driving rod moves downwards to apply pressure to the operation part so that the locking assembly can be unlocked, and the driving rod moves upwards to relieve the pressure applying state to the operation part so that the locking assembly can be locked. The manually adjusted lifting device has the advantages that the structure is simple, the operation process is stable and reliable, the failure rate is low, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tables, in particular to a lifting device for lifting tables and a lifting table. Background Art

[0002] With the rise of the concept of "ergonomics", people have begun to pay attention to the impact of furniture design on human health, among which the lifting table has received more and more attention. The lifting table is not only widely used in homes and offices, but also in many industries and places such as e-sports venues, medical venues, and educational venues. The lifting table can help users easily switch between sitting and standing positions, relieving the discomfort caused by sitting for a long time.

[0003] Existing lifting tables are roughly divided into automatic lifting tables and non-automatic lifting tables according to the lifting method. Automatic lifting tables use electricity as the power source, and the height of the lifting table is adjusted by the motor controlling the mechanical device or the pneumatic rod or the hydraulic rod. Non-automatic lifting tables use manpower to adjust the mechanical device or the hydraulic rod or the pneumatic rod. For example, a Chinese utility model patent application with application number CN202122780904.9 (authorization announcement number: CN216316242U) discloses a lifting table with a damping mechanism, including a foot, an output end lifting tube assembly and an input end lifting tube assembly, a transverse transmission mechanism between the output end lifting tube assembly and the input end lifting tube assembly, and side fixing plates on both sides of the output end lifting tube assembly and the input end lifting tube assembly, wherein the output end lifting tube assembly and the input end lifting tube assembly are provided with lifting components, and the input end lifting tube assembly is provided with a power source to input power; at least one of the output end lifting tube assembly, the transverse transmission mechanism, the input end lifting tube assembly, the lifting components and the power source is provided with a damping component; the transverse transmission mechanism includes a transmission rod, the cross-sectional structure of the transmission rod is a polygonal, sawtooth, spline or plum blossom shape, and the transmission rod is locked by a locking member, a plurality of sound-absorbing members are provided on the transmission rod, and a guiding sliding member is provided on the transmission rod; an adjustment pad is provided under the foot.

[0004] However, there are still some shortcomings in the existing lifting tables: lifting tables usually require a complex lifting mechanism to achieve height adjustment. For example, the lifting mechanism of electric lifting adjustment generally includes components such as motors, control panels, and lifting columns. These components not only occupy the space under the desktop, but may also increase the overall volume. Complex lifting mechanisms involve many parts, high production costs, and are prone to high failure rates and maintenance costs. On the other hand, due to the complexity of the lifting adjustment mechanism, users may need to go through a certain learning and adaptation process before they can master the lifting operation of the lifting table. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a lifting device for a lifting table with a convenient lifting and adjusting process and easy operation in view of the current status of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a lifting table using the above lifting adjustment mechanism in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the first technical problem is: a lifting device for a lifting table, comprising:

[0008] A support seat assembly, comprising a support seat, wherein a vertically extending movable channel and an movable chamber communicating with a lower port of the movable channel are defined in the support seat;

[0009] A handle and a driving rod, wherein the handle is configured to be connected to the support seat in a movable manner, the driving rod is movably arranged in the movable channel, the lower end of the driving rod extends into the movable chamber, and the driving rod is linked with the handle and can be driven downward by the handle;

[0010] The support rod assembly includes at least one support rod with adjustable length. Each support rod includes a locking assembly and an operating part arranged at the upper end of the support rod for controlling the switching of the above-mentioned locking assembly between a locked state and an unlocked state. When the locking assembly is in a locked state, the length of the support rod cannot be adjusted telescopically. When the locking assembly is in an unlocked state, the length of the support rod can be adjusted telescopically. The upper end of the support rod is connected to the support seat and extends into the active chamber, and cooperates with the drive rod. The drive rod moves downward to apply pressure to the operating part to unlock the locking assembly. The drive rod moves upward to release the pressure on the operating part to lock the locking assembly.

[0011] Generally speaking, the support rod can adopt various telescopic rod structures in the prior art that can be telescopically adjusted and have a locking assembly. In order to simplify the structure of the support rod and ensure its telescopic adjustment stability, preferably, the support rod also includes an outer tube and an inner tube that are arranged inside and outside and can move relative to each other in the length direction. The locking assembly is arranged in the inner tube. The locking assembly is configured to lock the above-mentioned outer tube and inner tube in a locked state so that the two cannot move relative to each other in the length direction, and to release the lock between the outer tube and the inner tube in an unlocked state to allow the two to move relative to each other in the length direction.

[0012] In order to enable the driving rod to automatically move away from the operating part of the support rod when the handle is not operated or released, thereby achieving the purpose of automatic locking of the support rod (the length cannot be adjusted), an elastic member is also included, which acts on the driving rod and makes the driving rod always have a tendency to move upward along the movable channel.

[0013] The above-mentioned elastic member can adopt various existing technologies and may include various elastic elements such as compression springs, torsion springs, and spring leaves. However, in order to better cooperate with the above-mentioned driving rod, a step portion with a larger upper portion and a smaller lower portion is defined on the inner wall of the movable channel, and the outer peripheral wall of the driving rod has a limiting protrusion protruding radially outward. The elastic member is a third spring, which is sleeved outside the driving rod, and its upper end is abutted against the limiting protrusion, and its lower end is abutted against the step portion of the movable channel.

[0014] The linkage operation between the handle and the driving rod can be achieved by driving the driving rod to move by sliding the wedge block linearly, or by setting a cam and rotating the cam. Preferably, in order to achieve more labor-saving operation of the handle, a cam that can rotate around a horizontally extending axis is also provided in the movable channel. The handle is connected to the cam and can drive the cam to rotate. The upper end of the driving rod is against the cam, and the cam can drive the driving rod to move downward as its rotation position changes.

[0015] In order to drive the cam to rotate, a transmission shaft horizontally passing through the movable channel is provided on the support seat, the cam sleeve is connected to the transmission shaft, and the handle is connected to the end of the transmission shaft to drive the transmission shaft to rotate.

[0016] In order to facilitate the installation of the driving rod, the driving rod can be configured as a split piece, wherein the driving rod comprises a rod body and a transmission block connected to the lower end of the rod body, and the transmission block is located in the movable chamber.

[0017] In order to achieve synchronous unlocking of each support rod, the transmission block is a disk structure with a downwardly protruding middle portion, and the bottom surface of the disk structure is constructed as a concave curved surface that gradually sinks upward from the middle portion to the outer periphery. The support rod assembly includes at least two support rods, and the upper ends of the support rods are arranged in sequence along the circumference of the disk and correspondingly abut against the concave curved surface. The above-mentioned disk structure with a concave curved surface can achieve synchronous contact or disengagement with the upper ends of each support rod when moving up and down, ensuring that each support rod can achieve synchronous unlocking or locking.

[0018] In order to match with each support rod, the transmission block has at least two pressure arms extending outward from the middle, and the bottom surface of each pressure arm is constructed with the concave curved surface, and the upper end of each support rod is respectively against the concave curved surface of each pressure arm. It is conceivable that the transmission block can also be designed as a complete disk body without notches or recesses in the circumferential direction.

[0019] As an improvement, the movable chamber of the support seat includes at least two sub-chambers arranged in sequence along the circumferential direction, and the bottom of the support seat is also provided with a movable opening extending radially in the area corresponding to each of the sub-chambers, the upper end of each support rod passes through the movable opening and extends into the corresponding sub-chamber, the upper end of each support rod is rotatably connected to the support seat, and can be relatively close to and folded and relatively far away from each other. The upper end of each support rod is also provided with an arc-shaped sheet body adapted to the concave surface of the transmission block, the first end of the arc-shaped sheet body adjacent to the middle position of the transmission block is rotatably connected to the main body of the support rod, and the second end of the arc-shaped sheet body adjacent to the edge position of the transmission block abuts on the concave surface of the pressure arm, the arc-shaped sheet body has an inner concave portion, and the support rod is provided with an operating rod that can move along its length direction, the end of the operating rod extends out of the upper end of the support rod and abuts against the inner concave portion of the arc-shaped sheet body, and the above-mentioned arc-shaped sheet body and operating rod together constitute the operating part of the support rod. When not in use or being transported, the support rods of the support rod assembly can be relatively close to each other and folded up, thereby reducing the occupied space and facilitating storage.

[0020] The technical solution adopted by the utility model to solve the second technical problem is: a lifting table, including a table top and a lifting device, the lifting device adopts the lifting device for the lifting table mentioned above, and the table top is connected to the support base of the lifting device.

[0021] Compared with the prior art, the advantages of the utility model are as follows: the user drives the driving rod to move downward through the operating handle, thereby applying pressure to the operating part of the support rod to unlock its locking assembly. After the locking assembly of the support rod is unlocked, the length of the support rod can be telescopically adjusted, that is, the use height of the lifting table can be flexibly adjusted. This manually adjusted lifting device has a simple structure, stable and reliable operation process, low failure rate, and reduced maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the lifting table of Example 1 of the utility model;

[0023] Figure 2 This is a right side view of the lifting table of Example 1 of the utility model;

[0024] Figure 3 This is a partial structural exploded view of the lifting table of Example 1 of the utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the support base assembly of Example 1 of the utility model;

[0026] Figure 5 It is a vertical cross-sectional view of the lifting table of Example 1 of the utility model;

[0027] Figure 6 for Figure 5 A in the enlarged view;

[0028] Figure 7 This is an exploded view of the support base assembly of Example 1 of the utility model;

[0029] Figure 8 This is a three-dimensional structural schematic diagram of a table top assembly according to Embodiment 1 of the present utility model;

[0030] Fig. 9 It is a vertical cross-sectional view of the table top assembly of Embodiment 1 of the present utility model;

[0031] Fig.10 This is a schematic diagram of the three-dimensional structure of the back of the table board assembly of Example 1 of the utility model;

[0032] Fig.11 This is a schematic diagram of the three-dimensional structure of the shelf and the support base in the separated state according to the first embodiment of the utility model;

[0033] Fig.12 This is a cross-sectional view of the shelf and the support base in the connected state according to Embodiment 1 of the utility model;

[0034] Fig.13 This is a schematic diagram of the three-dimensional structure of the connector of the support base of Example 1 of the utility model;

[0035] Fig.14 It is a three-dimensional structural schematic diagram of a back view of a shelf in Example 1 of the utility model;

[0036] Fig.15 This is a three-dimensional structural schematic diagram of the lifting table in Example 1 of the utility model, in which the support rod is in a retracted state;

[0037] Fig.16 This is a schematic diagram of the three-dimensional structure of the shelf and the support base in the connected state according to Embodiment 2 of the present utility model;

[0038] Fig.17 This is a schematic diagram of the three-dimensional structure of another angle when the shelf and the support base are connected in Example 2 of the utility model;

[0039] Fig.18 This is a schematic diagram of the three-dimensional structure of the shelf and the support base in the separated state according to the second embodiment of the utility model;

[0040] Fig.19 This is a schematic diagram of the three-dimensional structure of the connector of the support base of Example 2 of the utility model;

[0041] Fig. 20 This is an exploded view of the connector of the support base of Example 2 of the utility model. DETAILED DESCRIPTION

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0044] Example 1

[0045] Figure 1-Figure 15 A preferred embodiment of a lifting device and a lifting table for a lifting table of the utility model is shown. The lifting table includes a shelf 1, a tabletop assembly 3, a support seat assembly, a handle 26, a driving rod 24 and a support rod assembly. The support rod assembly is connected to the bottom of the support seat assembly to play a supporting role. The tabletop assembly 3 is installed on the support seat assembly, and the shelf 1 is connected to the top of the support seat assembly, that is, the position of the shelf 1 is higher than the position of the tabletop assembly 3. Computers, ipads, mobile phones and other items can be placed on the shelf 1, and keyboards, mice and other items can be placed on the tabletop assembly 3. Of course, no items can be placed on the shelf 1, and a laptop computer can be placed on the tabletop assembly 3.

[0046] The support base assembly includes a support base 2 and a connecting frame 5 connected to the support base 2. The support base 2 includes a base body 21 and a column 22 extending upward from the top of the base body 21. The support rod assembly is connected to the bottom of the base body 21. A connecting frame 5 is provided on the column 22 of the support base 2, and the table board assembly 3 is detachably connected to the connecting frame 5. The connecting frame 5 includes a sleeve 51 and a vertical plate 52 extending downward from the side of the sleeve 51, and the sleeve 51 is sleeved outside the column 22 of the support base 2 and fixed by fasteners. The bottom edge of the vertical plate 52 has a folded edge folded toward a side away from the table board (that is, toward a side close to the column 22), and the folded edge has a limiting notch 520 recessed toward a side away from the column 22 for the column 22 to limit the position therein, and the shape of the limiting notch 520 is adapted to the outer wall of the column 22. After the connecting frame 5 is installed in place, the folded edge at the bottom of the vertical plate 52 abuts against the outer wall of the column 22, and the position is limited by the above-mentioned limiting notch 520, thereby ensuring the reliability of the installation between the connecting frame 5 and the column 22. Figure 4, the vertical plate 52 is also provided with a connection hole 521 for connecting with the table top assembly 3, and two connection holes 521 can be arranged side by side, wherein each connection hole 521 includes a large hole portion 5211 and a small hole portion 5212 arranged sequentially from top to bottom and connected. The side of the table top assembly 3 is connected with a bolt 35, and the head of the bolt 35 can extend from the large hole portion 5211 to the back of the connecting frame 5, and after moving down to a set position, it forms a limit with the back of the peripheral edge of the small hole portion 5212 in the axial direction of the bolt 35. When disassembling, the table top assembly 3 is moved up to the position where the head of the bolt 35 is opposite to the large hole portion 5211 of the connection hole 521, and then moved outward from the large hole portion 5211 to complete the disassembly.

[0047] Figure 8-Figure 10 The structure of the table top assembly 3 of the present embodiment is shown. The table top assembly 3 includes at least two table tops arranged in sequence along the first direction L1, and the two adjacent table tops are respectively recorded as the first table top 31 and the second table top 32. The first table top 31 and the second table top 32 are rotatably connected in the adjacent area thereof, and the first table top 31 and the second table top 32 have an open state in which they are relatively unfolded to form a complete table top and a folded state in which they are relatively folded and stacked together as their relative positions change. In the folded state, the top surface of the first table top 31 fits with the top surface of the second table top 32.

[0048] The bottom of the first table board 31 and the second table board 32 are connected and fixed by a connecting pin 333. Specifically, the bottom of the first table board 31 has a first protruding block 331 protruding downward, and the first protruding block 331 is provided with a first mounting hole 3310 extending along the first direction. The bottom of the second table board 32 has a second protruding block 332 protruding downward, and the second protruding block 332 is provided with a second mounting hole 3320 extending along the first direction L1. When the first table board 31 and the second table board 32 are in an open state, the first mounting hole 3310 and the second mounting hole 3320 are opposite. The first mounting hole 3310 of the first protruding block 331 is provided with a connecting pin 333 that can slide along its length direction, wherein the connecting pin 333 can be inserted into the second mounting hole 3320 to limit the first protruding block 331 and the second protruding block 332, so that the first table board 31 and the second table board 32 cannot rotate. After the connecting pin 333 is disengaged from the second mounting hole 3320, the restriction between the first protrusion 331 and the second protrusion 332 can be released, allowing the table top and the second table top 32 to be rotated and folded.

[0049] There are two first protrusions 331 at the bottom of the first table board 31, which are spaced apart along the second direction, and are specifically concentrated in the middle area of ​​the length direction of the first table board 31 (i.e., the second direction L2, which is perpendicular to the first direction L1). Similarly, there are two second protrusions 332 at the bottom of the second table board 32, which are spaced apart along the second direction, and are specifically concentrated in the middle area of ​​the length direction of the second table board 32 (i.e., the second direction). The two first protrusions 331 of the first table board 31 and the two second protrusions 332 of the second table board 32 are limited by two connecting pins 333, which further ensures the stability of the table board assembly 3 in the open state.

[0050] Generally speaking, the connecting pin 333 can be installed into the corresponding installation channel from the port thereof. However, considering that the connecting pin itself has a certain length, it is necessary to provide sufficient clearance space at the port of the installation channel. Furthermore, in order to better meet the user's habit of installing directly from the bottom, in a preferred embodiment, an installation opening 3311 which is connected to the first installation channel 3310 and is used for the connecting pin 333 to be installed into and removed from the first installation channel 3310 is also provided on the bottom wall of the first protrusion 331.

[0051] Both sides in the length direction of the first table board 31 and the second table board 32 extend along the second direction. The side where the first table board 31 and the second table board 32 meet has a first folded edge 311 that is folded downward, and the side away from the second table board 32 has a third folded edge 312 that is turned downward. The side where the second table board 32 and the first table board 31 meet has a second folded edge 321 that is folded downward, and the side away from the first table board 31 has a fourth folded edge 322 that is turned downward. The first protrusion 331 at the bottom of the first table board 31 meets the first folded edge 311, and the first mounting hole 3310 penetrates the first folded edge 311, that is, a corresponding port is formed on the side wall of the corresponding first folded edge 311. The second protrusion 332 at the bottom of the second table board 32 meets the second folded edge 321, and the second mounting hole 3320 penetrates the second folded edge 321, that is, a corresponding port is formed on the side wall of the corresponding second folded edge 321. When the first table top 31 and the second table top 32 are in the open state, the first folded edge 311 fits with the second folded edge 321 , and the port of the first folded edge 311 connected to the first installation channel 3310 is opposite to the port of the second folded edge 321 connected to the second installation channel 3320 .

[0052] In order to reduce production costs, in the preferred solution of this embodiment, two adjacent table boards are designed to have the same structure, that is, each table board (the first table board 31 and the second table board 32 mentioned above) has a first protrusion 331 and a second protrusion 332 at the bottom, wherein the first protrusion 331 and the second protrusion 332 on each table board are arranged at intervals in the first direction. Specifically, the second protrusion 332 at the bottom of the first table board 31 is connected to the third folded edge 312, and the second mounting hole 3320 on the second protrusion 332 passes through to the third folded edge 312 of the first table board 31. Similarly, the first protrusion 331 at the bottom of the second table board 32 is connected to the fourth folded edge 322, and the first mounting hole 3310 on the first protrusion 331 passes through to the fourth folded edge 322 of the second table board 32. Since the first table board 31 and the second table board 32 have the same structure, the first folded edge 311 of the first table board 31 can be understood as being equal to the fourth folded edge 322 of the second table board 32, and the third folded edge 312 of the first table board 31 can be understood as being equal to the second folded edge 321 of the second table board 32. The lengths of the first folded edge 311 and the third folded edge 312 of the first table board 31 extending downwards are gradually reduced from the middle of the length direction of the first table board 31 to the left and right sides. Similarly, the lengths of the second folded edge 321 and the fourth folded edge 322 of the second table board 32 extending downwards are also gradually reduced from the middle of the length direction of the second table board 32 to the left and right sides. In order to further improve the strength of the table top assembly 3, the bottom of the first table top 31 is located between the first folded edge 311 and the third folded edge 312 and is also provided with a first reinforcing rib 313 extending along the first direction, and the bottom of the second table top 32 is located between the second folded edge 321 and the fourth folded edge 322 and is also provided with a second reinforcing rib 323 extending along the first direction.

[0053] like Fig.10 The structure in which the side of the first table board 31 of the table board assembly 3 is connected to the connecting frame 5 on the support base 2 through bolts 35 is shown. Specifically, there are two bolts 35, each of which is limited by a nut after passing through the second installation channel 2203 of the second protrusion 332 at the bottom of the first table board 31, and the head of the bolt 35 is at a certain distance from the third folded edge 312 of the first table board 31, so that the head of the bolt 35 can pass through the large hole portion 5211 of the connecting hole 521 and move downward to be inserted into the small hole portion 5212 on the vertical plate 52 of the connecting frame 5.

[0054] See also Figure 8In this embodiment, the first table board 31 and the second table board 32 are connected in rotation in the adjacent area between the two by a flexible patch 34 attached to the top surface of the two. The above-mentioned "flexible patch 34" refers to a patch structure that can be folded and bent under the action of external force. This flexible patch 34 allows the two objects to be relatively deflected to form a certain angle. Generally speaking, the flexible patch 34 can only be set to cover a part of the splicing seam, or it can be set in sequence along the length direction of the splicing seam. It can also be set along the length direction of the splicing seam. A complete strip is set to completely cover the splicing seam. In a preferred embodiment, in order to ensure the aesthetics of the table board, the flexible patch 34 is a whole strip extending along the length direction of the splicing seam between the first table board 31 and the second table board 32, which covers the splicing seam. The flexible patch 34 can be made of nylon carbon fiber, rubber or silicone material. The flexible patch 34 is connected to the top surface of the adjacent area between the first table board 31 and the second table board 32 by bonding.

[0055] See also Figure 11-Figure 14 , the top of the column 22 of the support seat 2 is a connector 220 used to connect with the shelf 1. The connector 220 includes a first side wall 2201 and a second side wall 2202 that are opposite to each other and extend vertically. The top of the back of the shelf 1 is rotatably connected to the connector 220 through a first rotating shaft 15 extending left and right. Specifically, the back of the shelf 1 has two positioning plates 11 that are spaced apart from each other and extend backward. The first rotating shaft 15 penetrates the first side wall 2201 and the second side wall 2202 of the connector 220 in the left and right directions, and the two ends are respectively connected to the two positioning plates 11. The two positioning plates 11 above jointly define a movable groove 112 for the connector 220 to be inserted therein and to be able to deflect and move up and down therein. The opposite side walls of the two positioning plates 11 constitute the two inner side walls of the movable groove 112, and the two inner side walls are correspondingly fitted with the first side wall 2201 and the second side wall 2202 of the connector 220.

[0056] The two positioning plates 11 have relative side walls with positioning recesses 110 arranged in sequence along the circumferential direction centered on the first rotating shaft 15. Generally speaking, the "positioning recess 110" may refer to an area that is recessed relative to the side wall surface of the positioning plate 11, such as a pit, a groove or the like, or a through hole structure that penetrates the other wall surface of the positioning plate 11. The positioning recess 110 in this embodiment shows a pit structure formed on the positioning plate 11.

[0057] The connector 220 of the support seat 2 is also provided with a positioning pin 221 that can move in a direction parallel to the first rotating shaft 15. The positioning pin 221 is located below the first rotating shaft 15 and is arranged adjacent to the first rotating shaft 15. Specifically, the connector 220 is provided with a mounting channel 2203 extending left and right. Preferably, two positioning pins 221 are used. The two positioning pins 221 are arranged in the mounting channel 2203 at intervals along the left and right directions. The two positioning pins 221 are away from each other and can pass through the first side wall 2201 and the second side wall 2202 of the connector 220 and are correspondingly inserted into the positioning recesses 110 of the two positioning plates 11 to limit the rotation of the shelf 1 relative to the support seat 2. This state is the locked state. The two positioning pins 221 can also be away from each other and disengaged from the corresponding positioning recesses 110 of the two positioning plates 11 to release the lock between the shelf 1 and the support seat 2. This state is the unlocked state.

[0058] An elastic member is also provided in the installation channel 2203 of the connector 220. In a preferred embodiment, the elastic member is a first spring 231. The left and right ends of the first spring 231 are respectively against the two positioning pins 221, so that the two positioning pins 221 always have a tendency to move toward the side where the corresponding positioning plate 11 is located. More specifically, the positioning pin 221 is designed as a non-uniform pin shaft structure with a small outer diameter at the outer end and a large inner end. A step portion 2101 is correspondingly formed on the outer peripheral wall of the positioning pin 221, and a step hole is also correspondingly formed on the inner wall of the installation channel 2203 of the connector 220. The step hole cooperates with the step portion 2101 of the positioning pin 221 to limit the positioning pin 221 from completely escaping from the installation channel 2203.

[0059] See also Fig.13 and Fig.14The matching structure between the end of the positioning pin 221 and the positioning recess 110 of the positioning plate 11 of this embodiment is configured as follows: when the shelf 1 is subjected to an external force and rotates around the first rotation axis 15, the shelf 1 can apply an axial force to the positioning pin 221 to overcome the elastic force of the elastic member and make the positioning pin 221 escape from the positioning recess 110. In a preferred embodiment, the outer end of the positioning pin 221 is configured as a ball head structure 2210 with an outer convex arc surface, and the inner wall surface of each positioning recess 110 on the positioning plate 11 is configured as an inner concave arc surface that matches the ball head structure 2210 of the positioning pin 221. The ball head structure 2210 of the positioning pin 221 and the concave arc surface of the positioning plate 11 cooperate to have a certain guiding effect, so that after the user applies sufficient force in the angular rotation direction of the shelf 1, the positioning pin 221 can overcome the elastic force of the first spring 231 and retract under the action of the concave arc surface of the positioning plate 11, thereby enabling the ball head structure 2210 of the positioning pin 221 to smoothly escape from the positioning recess 110 on the positioning plate 11, thereby achieving the purpose of adjusting the angle of the shelf 1. In order to allow the ball head structure 2210 of the positioning pin 221 to smoothly snap into the next adjacent positioning recess 110 after escaping from the positioning recess 110 on the positioning plate 11 when the shelf 1 is adjusted by turning, the two adjacent positioning recesses 110 on the positioning plate 11 of this embodiment are connected by a guide opening 111, and the guide opening 111 has a smoothly transitional contour line or curved surface.

[0060] The two positioning plates 11 on the shelf 1 are located on the back side of the shelf 1 near the top, so that the user can move the lower part of the shelf 1 to adjust the angle.

[0061] The bottom of the shelf 1 also has a hook 13 extending forward and folding upward, and the hook 13 can be provided with two arranged at intervals on the left and right. The hook 13 can be convenient for supporting the articles placed on the shelf 1, such as computers, mobile phones, ipd, portable screens, etc., at the bottom. On the other hand, in order to avoid the articles placed on the shelf 1 from falling forward, the top of the shelf 1 is also provided with an anti-slipping strip 14 located at the front side of the shelf 1 and extending in the left and right directions, and a socket is provided on the left and right side walls of the shelf 1, and the left and right ends of the anti-slipping strip 14 are inserted in two sockets on the shelf 1. When placing articles, the articles can be placed between the anti-slipping strip 14 and the front side wall of the shelf 1. The rubber rope, rubber band, etc. that can be used for the above-mentioned anti-slipping strip 14 have a certain elastic rope, and metal strips (such as stainless steel material) and plastic strips with a certain strength and non-stretchable can also be used.

[0062] The support seat 2 defines a vertically extending movable channel 210 and an movable chamber 211 connected to the lower port of the movable channel 210. Specifically, the seat body 21 of the support seat 2 corresponds to the above-mentioned movable chamber 211, and the interior of the column 22 of the support seat 2 is hollow to form the above-mentioned movable channel 210. The handle 26 is configured to be connected to the column 22 of the support seat 2 in a movable and operable manner, and the drive rod 24 is movably arranged in the movable channel 210, and the lower end of the drive rod 24 extends into the movable chamber 211. The drive rod 24 is linked with the handle 26 and can be driven downward by the handle 26. Specifically, the column 22 has a transmission shaft 252 that passes through the movable channel 210 horizontally, and the end of the transmission shaft 252 passes through the column 22 and is connected to the handle 26. Pulling the handle 26 up and down can drive the transmission shaft 252 to rotate around its axis. A cam 251 is also provided in the movable channel 210. The cam 251 is sleeved on the transmission shaft 252 and can rotate with the transmission shaft 252. The upper end of the driving rod 24 abuts against the outer wall surface (i.e., the eccentric contour surface) of the cam 251. When the cam 251 rotates, the cam 251 can drive the driving rod 24 to move downward.

[0063] The movable channel 210 of the column 22 is also provided with an elastic member, which acts on the driving rod 24 and makes the driving rod 24 always have a tendency to move up along the movable channel 210. Specifically, the inner wall of the movable channel 210 defines a step portion 2101 that is larger at the top and smaller at the bottom, and the outer peripheral wall of the driving rod 24 has a limiting convex portion 2410 that protrudes radially outward. The above-mentioned elastic member can be a third spring 27, which is sleeved outside the driving rod 24, with its upper end abutting against the limiting convex portion 2410 of the driving rod 24, and its lower end abutting against the step portion 2101 of the movable channel 210. When the handle 26 is not operated or released, the driving rod 24 can automatically move up under the action of the third spring 27, that is, it is away from the operating portion of the support rod 4, so as to achieve the purpose of automatically locking the support rod 4 (the length cannot be adjusted).

[0064] The base body 21 of the support base 2 is connected and fixed to the bottom of the column 22 through the head 211. The head 211 is also provided with a through hole for the driving rod 24 to pass through. The upper end of the through hole of the head 211 forms the above-mentioned step portion 2101.

[0065] The driving rod 24 includes a rod body 241 and a transmission block 242 connected to the lower end of the rod body 241, and the transmission block 242 is threadedly connected to the rod body 241. The transmission block 242 is located in the active chamber 211 of the seat body 21. In order to facilitate the installation of the transmission block 242 and the connection between the seat body 21 and the column 22, the bottom of the seat body 21 has an opening and a bottom cover 210 connected to the opening.

[0066] The support rod assembly includes at least one support rod 4 with adjustable length. Figure 1 As shown, this embodiment shows three support rods 4. Each support rod 4 includes a locking assembly and an operating portion arranged at the upper end of the support rod 4 for controlling the switching of the above-mentioned locking assembly between a locked state and an unlocked state. When the locking assembly is in the locked state, the length of the support rod 4 cannot be adjusted telescopically, and when the locking assembly is in the unlocked state, the length of the support rod 4 can be adjusted telescopically. The upper end of the support rod 4 is connected to the support seat 2 and extends into the active chamber 211. The operating portion at the upper end of the support rod 4 cooperates with the drive rod 24, wherein the drive rod 24 moves downward to apply pressure to the operating portion to unlock the locking assembly, and the drive rod 24 moves upward to release the pressure on the operating portion to lock the locking assembly.

[0067] The support rod 4 with a built-in locking device and unlocking and locking operations at the end generally includes an outer tube 42 and an inner tube 41 which are arranged inside and outside and can move relative to each other in the length direction. The locking assembly is arranged in the inner tube 41. The locking assembly is configured to lock the above-mentioned outer tube 42 and the inner tube 41 in the locked state so that the two cannot move relative to each other in the length direction, and to release the lock between the outer tube 42 and the inner tube 41 in the unlocked state to allow the two to move relative to each other in the length direction. The locking device of the support rod 4 of this embodiment can adopt the locking mechanism in the "Locking mechanism, support rod assembly and support device" with application number CN201621304135.8 (authorization announcement number: CN206386351U). The structure and operation process of the locking mechanism are both existing technologies and will not be repeated here.

[0068] See also Figure 7 In order to achieve synchronous unlocking of each support rod 4, the transmission block 242 of this embodiment is a disk structure with a downwardly protruding middle portion, and the bottom surface of the disk structure is constructed as a concave curved surface 2420 that gradually concave upward from the middle portion to the outer circumference. The upper ends of the three support rods 4 of the support rod assembly are arranged in sequence along the circumference of the disk, and correspondingly abut against the concave curved surface 2420 at the bottom of the transmission block 242. To match the above three support rods 4, the transmission block 242 has three pressing arms 2421 extending outward from the middle portion, and the bottom surface of each pressing arm 2421 is constructed with the above concave curved surface 2420, and the upper ends of each support rod 4 are correspondingly abutted against the concave curved surface 2420 of each pressing arm 2421. It is conceivable that the transmission block can also be designed as a complete disk without a notch or recess in the circumferential direction. The above-mentioned disc structure design with the concave curved surface 2420 can achieve synchronous contact or disengagement with the upper ends of the support rods 4 when moving up and down, ensuring that the support rods 4 can be unlocked or locked synchronously.

[0069] The movable chamber 211 of the support seat 2 includes at least two sub-chambers 2110 arranged in sequence along the circumferential direction, and the bottom of the support seat 2 is also provided with an movable opening 2111 extending in the radial direction in the area corresponding to each movable groove 112. The upper end of each support rod 4 passes through the movable opening 2111 and extends into the corresponding sub-chamber 2110. The upper end of each support rod 4 is rotatably connected to the support seat 2 through the second rotating shaft 40. The extension direction of the second rotating shaft 40 is consistent with the width direction of the movable opening 2111, that is, the extension lines of the three second rotating shafts 40 form a triangle on the horizontal plane. When the three support rods 4 rotate relative to the support seat 2, they have a folded state in which the lower ends of the support rods 4 are relatively close to each other and folded together, and an expanded state in which the lower ends of the support rods 4 are relatively far away from each other and expanded. In the folded state, the three support rods 4 are close together to form a relatively "thick" rod body, which occupies much less space than the support rod assembly in the expanded state. In the unfolded state, a triangular support structure is formed, and the support seat 2 is supported by three rods at the bottom, which is more firm and stable.

[0070] In order to facilitate cooperation with the transmission block 242, the upper end of each support rod 4 is also provided with an arc-shaped sheet 44 that is compatible with the concave surface 2420 of the transmission block 242. The first end of the arc-shaped sheet 44 adjacent to the middle position of the transmission block 242 is rotatably connected to the main body of the support rod 4, and the second end of the arc-shaped sheet 44 adjacent to the edge position of the transmission block 242 abuts against the concave surface 2420 of the pressure arm of the transmission block 242. Specifically, the top of the second end of the arc-shaped sheet 44 (that is, the side facing the transmission block 242) is also provided with a roller 441 that can roll freely relative to the arc-shaped sheet 44. As a result, rolling friction is formed between the annular sheet and the pressure arm of the transmission block 242 through the roller 441, and the friction force is smaller. When the transmission block 242 moves up and down, the rotation of the arc-shaped sheet 44 is more flexible, thereby ensuring the reliability of the unlocking and locking process of the support rod 4. The bottom of the arc-shaped sheet 44 (i.e., the side facing the main body of the support rod 4) has an inner concave portion 440, and an operating rod that can move along the length direction of the support rod 4 is provided inside the support rod 4, and the end of the operating rod extends out of the upper end of the support rod 4 and abuts against the inner concave portion 440 of the arc-shaped sheet 44. The operating rod of this embodiment has the same function as the linkage rod in the "Locking Mechanism, Support Rod Assembly and Support Device" with application number CN201621304135.8.

[0071] When the lifting table is needed, the support rods 4 of the support rod assembly can be relatively far apart and in an expanded state. By adjusting the length of the support rods 4 to the corresponding length, the support of the table top and other components can be achieved. When the lifting table is not needed, the support rods 4 can be shortened to a relatively short length, and then the lower ends of the support rods 4 can be relatively close together. After the support rods 4 are folded, they occupy a small volume and can be stored or carried more conveniently.

[0072] Example 2

[0073] Figure 16-Figure 20 Another preferred embodiment of the lifting table of the utility model is shown. The difference between this embodiment and embodiment 1 is that the matching structure of the angle adjustment between the shelf 1 and the connecting head 220 of the support seat 2 is different. Specifically, in this embodiment, the support seat 2 is also provided with two operating handles 222 which are respectively connected to the two positioning pins 221 and can drive the positioning pins 221 to move between the unlocking position and the locking position. Correspondingly, the positioning recess 110 on the positioning plate 11 of the shelf 1 can correspond to a through hole structure that penetrates the outer wall surface of the positioning plate 11. Of course, a pit structure can also be used as in embodiment 1.

[0074] See also Fig.19 , the operating handle 222 is rod-shaped as a whole and extends downward. A clearance opening is correspondingly provided in the lower area of ​​the connector 220 located at the installation channel 2203, and the operating handle 222 is connected to the inner end of the corresponding positioning pin 221 through the clearance opening. Since the positioning pin 221 is connected with the operating handle 222, the operating handle 222 can also play a role of limiting. Therefore, the positioning pin 221 of this embodiment does not need to be designed as a stepped shaft structure as in Example 1, and a conventional pin shaft of equal diameter can be used. Similarly, the outer end of the positioning pin 221 does not need to be designed as a convex ball head structure 2210.

[0075] The main body of the shelf 1 is provided with an operation opening 10 that runs through from front to back, and two operation handles 222 extend downward to the back of the area where the operation opening 10 is located, and can be seen from the front of the shelf 1 through the operation opening 10. In this way, the user can directly pass the operation opening 10 on the main body of the shelf 1 to operate the operation handle 222, which improves the user experience. In a preferred embodiment, the two operation handles 222 are arranged adjacent to each other, and specifically, the distance between the two is configured to be suitable for single-handed operation.

[0076] The elastic member of this embodiment is a second spring 232, which is arranged between the two operating handles 222 and makes the two operating handles 222 always have a tendency to move away from each other. A guide rod 12 is arranged between the two operating handles 222, and the two operating handles 222 are provided with through holes extending left and right for the guide rod to pass through. The guide rod 12 includes a limit flange 121 protruding radially outward in the middle part and two guide sections 122 located on the left and right sides of the limit flange 121, and the two guide sections 122 are respectively penetrated in the through holes of the two operating handles 222. There are two second springs 232, which are respectively sleeved on the two guide sections 122 of the guide rod 12 and abut between the limit stop edge and the corresponding operating handle 222.

[0077] In order to facilitate the installation of the positioning pin 221 and the operating handle 222 and other components, the front side wall of the connector 220 of the support seat 2 is provided with an opening that is connected to the installation channel 2203, and the opening is connected to a cover plate 2204 by screws. After the positioning pin 221 and other components are assembled, the cover plate 2204 can be used to cover and limit the positioning pin 221 to prevent it from falling out of the front opening.

Claims

1. A lifting device for a lifting table, characterized in that include: A support seat assembly comprises a support seat (2), wherein a vertically extending movable channel (210) and an movable chamber (211) communicating with a lower port of the movable channel (210) are defined in the support seat (2); A handle (26) and a driving rod (24), wherein the handle (26) is configured to be connected to the support seat (2) in a movable and operable manner, and the driving rod (24) is movably arranged in the movable channel (210), and the lower end of the driving rod (24) extends into the movable chamber (211). The driving rod (24) is linked with the handle (26) and can be driven to move downward by the handle (26); A support rod assembly comprises at least one support rod (4) whose length is adjustable. Each support rod (4) comprises a locking assembly and an operating part arranged at the upper end of the support rod (4) for controlling the switching of the locking assembly between a locked state and an unlocked state. When the locking assembly is in the locked state, the length of the support rod (4) cannot be adjusted telescopically. When the locking assembly is in the unlocked state, the length of the support rod (4) can be adjusted telescopically. The upper end of the support rod (4) is connected to the support seat (2) and extends into the active chamber (211) to cooperate with the drive rod (24). The drive rod (24) moves downward to apply pressure to the operating part to unlock the locking assembly. The drive rod (24) moves upward to release the pressure on the operating part to lock the locking assembly.

2. The lifting device for a lifting table according to claim 1, characterized in that: The support rod (4) further comprises an outer tube (42) and an inner tube (41) which are arranged inside and outside and can move relative to each other in the length direction. The locking assembly is arranged in the inner tube (41). The locking assembly is configured to lock the outer tube (42) and the inner tube (41) in a locked state so that the two cannot move relative to each other in the length direction, and to release the lock between the outer tube (42) and the inner tube (41) in an unlocked state so that the two can move relative to each other in the length direction.

3. The lifting device for a lifting table according to claim 1, characterized in that: It also includes an elastic member, which acts on the driving rod (24) and enables the driving rod (24) to always have a tendency to move upward along the movable channel (210).

4. The lifting device for a lifting table according to claim 3, characterized in that: The inner wall of the movable channel (210) defines a step portion (2101) which is larger at the top and smaller at the bottom. The outer peripheral wall of the driving rod (24) has a limiting protrusion (2410) which protrudes radially outward. The elastic member is a third spring (27). The third spring (27) is sleeved outside the driving rod (24), and its upper end abuts against the limiting protrusion (2410), and its lower end abuts against the step portion (2101) of the movable channel (210).

5. The lifting device for a lifting table according to claim 3, characterized in that: A cam (251) that can rotate around a horizontally extending axis is also provided in the movable channel (210); the handle (26) is connected to the cam (251) and can drive the cam (251) to rotate; the upper end of the driving rod (24) abuts against the cam (251); and the cam (251) can drive the driving rod (24) to move downward as its rotation position changes.

6. The lifting device for a lifting table according to claim 5, characterized in that: The support seat (2) is provided with a transmission shaft (252) which horizontally passes through the movable channel (210); the cam (251) is sleeved and connected to the transmission shaft (252); and the handle (26) is connected to the end of the transmission shaft (252) and can drive the transmission shaft (252) to rotate.

7. The lifting device for a lifting table according to any one of claims 1 to 6, characterized in that: The driving rod (24) comprises a rod body (241) and a transmission block (242) connected to the lower end of the rod body (241), and the transmission block (242) is located in the active chamber (211).

8. The lifting device for a lifting table according to claim 7, characterized in that: The transmission block (242) is a disk structure with a downwardly protruding middle portion, and the bottom surface of the disk structure is constructed as an inner concave curved surface (2420) that gradually recesses upward from the middle portion to the outer periphery. The support rod assembly comprises at least two support rods (4), and the upper ends of the support rods (4) are arranged in sequence along the circumference of the disk and correspondingly abut against the inner concave curved surface (2420).

9. The lifting device for a lifting table according to claim 8, characterized in that: The transmission block (242) has at least two pressure arms extending outward from the middle, the bottom surface of each pressure arm forms the concave curved surface (2420), and the upper end of each support rod (4) respectively abuts against the concave curved surface (2420) of each pressure arm.

10. The lifting device for a lifting table according to claim 9, characterized in that: The movable chamber (211) of the support seat (2) comprises at least two sub-chambers (2110) arranged in sequence along the circumferential direction. The bottom of the support seat (2) is also provided with a movable opening (2111) extending in the radial direction in an area corresponding to each of the sub-chambers (2110). The upper end of each support rod (4) passes through the movable opening (2111) and extends into the corresponding sub-chamber (2110). The upper end of each support rod (4) is rotatably connected to the support seat (2) and can be relatively close to be folded and relatively far away from being unfolded. The upper end of each support rod (4) is also provided with an arc-shaped sheet (4) adapted to the concave surface (2420) of the transmission block (242). 4), the first end of the arc-shaped sheet (44) at the middle position adjacent to the transmission block (242) is rotatably connected to the main body of the support rod (4), and the second end of the arc-shaped sheet (44) at the edge position adjacent to the transmission block (242) abuts against the concave surface (2420) of the pressure arm, the arc-shaped sheet (44) has an inner concave portion (440), and the support rod (4) is provided with an operating rod that can move along its length direction, and the end of the operating rod extends out of the upper end of the support rod (4) and abuts against the inner concave portion (440) of the arc-shaped sheet (44), and the above-mentioned arc-shaped sheet (44) and the operating rod together constitute the operating part of the support rod (4).

11. A lifting table, comprising a table top and a lifting device, characterized in that: The lifting device is a lifting device for a lifting table as claimed in any one of claims 1 to 10, and the table top is connected to a support seat (2) of the lifting device.

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