Simple lifting table

Abstract

The utility model relates to a simple lifting table which comprises a table plate assembly. The table plate assembly is connected to the supporting seat; and the supporting rod assembly is connected to the bottom of the supporting seat and comprises at least three supporting rods with telescopic and adjustable lengths, the upper ends of the supporting rods are rotationally connected to the supporting seat, and the supporting rod assembly has a folding state in which the lower ends of the supporting rods are relatively close to each other and are folded together and an unfolding state in which the lower ends of the supporting rods are relatively far away from each other and are unfolded. When the lifting table needs to be used, the supporting rods of the supporting rod assembly can be relatively far away from each other and are in an unfolded state, the length of the supporting rods is adjusted to the corresponding length, and then the table plate and other components can be supported; when the lifting table does not need to be used, all the supporting rods are shortened to be relatively short, then the lower ends of all the supporting rods are relatively close to each other and are folded together, and after all the supporting rods are folded, the occupied space is small, and the lifting table can be more conveniently stored or carried.

Description

Technical Field

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

[0002] With the rise of ergonomics, people are beginning to pay attention to the impact of furniture design on human health. Among these, height-adjustable desks are garnering increasing attention. These desks are widely used not only in homes and offices, but also in various industries and venues, including esports venues, medical facilities, and educational institutions. They allow users to easily switch between sitting and standing positions, alleviating the discomfort of prolonged sitting.

[0003] Existing lift tables are broadly categorized by their lifting method as automatic or non-automatic. Automatic lift tables are powered by electricity, with an electric motor controlling a mechanical device or pneumatic or hydraulic actuator to adjust the height of the lift. Non-automatic lift tables rely on manual control of the mechanical device or hydraulic or pneumatic actuators. For example, the Chinese utility model patent application with application number CN202122780904.9 (authorization announcement number: CN216316242U) discloses a lifting table with a damping mechanism, including a base, 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, side fixing plates on both sides of the output end lifting tube assembly and the input end lifting tube assembly, 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 component 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 base.

[0004] However, existing lifting tables still have certain shortcomings: in order to improve the stability of the lifting table, the number of legs is usually increased, generally at least two legs are arranged side by side. The above legs can only be adjusted up and down, but cannot be folded horizontally. These design choices increase the overall size and occupied space of the lifting table. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a lifting table which has good stability when in use and can be folded to reduce the space occupied, in response to the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a simple lifting table, comprising:

[0007] Table top assembly;

[0008] A support base, to which the table top assembly is connected;

[0009] The support rod assembly is connected to the bottom of the support base and includes at least three support rods with adjustable lengths. The upper end of each support rod is rotatably connected to the support base and has a folded state in which the lower ends of each support rod are relatively close to each other and folded together, and an expanded state in which the lower ends of each support rod are relatively far apart and expanded.

[0010] In order to facilitate the installation of the table top, the support base includes a base body and a column extending upward from the base body, and the side of the table top assembly is connected to the column.

[0011] In order to achieve detachable connection of the table top for easy storage, it also includes a connecting frame connected to the column, the connecting frame includes a sleeve connected to the outside of the column and a vertical plate extending downward from the sleeve, the vertical plate has two connecting holes arranged side by side, each connecting hole includes a large hole part and a small hole part which are arranged in sequence from top to bottom and connected, the side of the table top assembly is connected with a bolt, the head of the bolt can extend from the large hole part to the back side of the connecting frame, and after moving down to the set position, it forms a limit with the circumferential back side of the small hole part in the axial direction of the bolt.

[0012] In order to ensure the reliability of the installation between the connecting frame and the column, the bottom edge of the vertical plate has a folded edge folded toward the side away from the table board assembly, and the folded edge has a limiting notch recessed toward the side away from the column for the column to be limited therein.

[0013] As an improvement, the bottom of the support base has at least three movable openings arranged sequentially along a circumference centered on a vertical line and extending radially. The upper end of each support rod is pivotally connected to a corresponding movable opening of the support base. The design of these movable openings allows each support rod to deflect and move along the extension direction of the movable opening, achieving stable folding and unfolding of the support frame assembly.

[0014] For easy storage, the table top assembly includes at least two table tops arranged in sequence along a first direction, and the two adjacent table tops are respectively recorded as the first table top and the second table top. The first table top and the second table top are rotatably connected in the adjacent area between the two, and 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.

[0015] In order to ensure the stability of the table top in the unfolded state, the bottom of the first table top has a first protrusion protruding downward, and the first protrusion is provided with a first mounting hole extending along the first direction. The bottom of the second table top has a second protrusion protruding downward, and the second protrusion is provided with a second mounting hole extending along the first direction. When the first table top and the second table top are in the open state, the first mounting hole is opposite to the second mounting hole. The first mounting hole is also provided with a connecting pin that can slide along the second direction. The connecting pin can be inserted into the second mounting hole and removed from the second mounting hole. The above-mentioned second direction is perpendicular to the first direction.

[0016] The first table top and the second table top can be rotatably connected by a conventional hinge or shaft, but the above-mentioned rotatable connection structure is relatively complex. The first table top and the second table top are rotatably connected in the adjacent area thereof through a flexible patch attached to the top surface of both.

[0017] To further expand the multifunctionality of the lift table, it also includes a shelf, which is pivotally connected to the top of the column via first rotating shafts extending left and right, with adjustable angles. The shelf can be used to store items such as computers, mobile phones, IPDs, and portable screens. The adjustable shelf angle can better meet the user's needs and adapt to the user's posture.

[0018] In order to ensure the reliability of the shelf angle adjustment relative to the support seat, the back of the shelf has a positioning plate extending backward, and the positioning plate has positioning recesses arranged in sequence along the circumferential direction centered on the above-mentioned first rotating shaft, and the support seat is provided with a positioning pin that can move in a direction parallel to the first rotating shaft. The positioning pin can be inserted into the positioning recess on the positioning plate to limit the rotation of the shelf relative to the support seat in a locked state as its moving position changes, and can be removed from the positioning recess on the positioning plate to allow the shelf to rotate relative to the support seat in an unlocked state.

[0019] Compared with the existing technology, the advantages of the present invention are as follows: the height adjustment of the lifting table is achieved by adopting a support rod with adjustable length. When the lifting table needs to be used, the support rods of the support rod assembly can be relatively far apart and in an expanded state. By adjusting the length of the support rod 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 are shortened to a relatively short length, and then the lower ends of the support rods are relatively close together and folded together. After the support rods are folded, they occupy a small volume and can be more conveniently stored or carried. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the lifting table of Example 1 of the present utility model;

[0021] Figure 2 This is a right side view of the lift table according to Example 1 of the present utility model;

[0022] Figure 3 This is a partial structural exploded view of the lift table according to Example 1 of the present utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the support base assembly of Example 1 of the present utility model;

[0024] Figure 5 This is a vertical cross-sectional view of the lift table according to Example 1 of the present utility model;

[0025] Figure 6 for Figure 5 A magnified view of point A in the figure;

[0026] Figure 7 This is an exploded view of the support base assembly of Example 1 of the present utility model;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the table top assembly of Example 1 of the present utility model;

[0028] Figure 9 A vertical cross-sectional view of the table top assembly of Example 1 of the present utility model;

[0029] Figure 10 This is a schematic diagram of the three-dimensional structure of the back of the table top assembly of Example 1 of the present utility model;

[0030] Figure 11 This is a schematic diagram of the three-dimensional structure of the shelf and the support base in the separated state according to Example 1 of the present utility model;

[0031] Figure 12 This is a cross-sectional view of the shelf and the support base in the connected state according to Example 1 of the present utility model;

[0032] Figure 13 This is a schematic diagram of the three-dimensional structure of the connector of the support base of Example 1 of the present utility model;

[0033] Figure 14 This is a schematic diagram of the three-dimensional structure of the back view of the shelf of Example 1 of the present utility model;

[0034] Figure 15 This is a schematic diagram of the three-dimensional structure of the lifting table in Example 1 of the present utility model, in which the support rod is in a retracted state;

[0035] Figure 16 This is a schematic diagram of the three-dimensional structure of the shelf and the support base in the connected state according to Example 2 of the present utility model;

[0036] Figure 17This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention when the shelf and the support base are connected at another angle;

[0037] Figure 18 This is a schematic diagram of the three-dimensional structure of the shelf and the support base in the separated state according to Example 2 of the present utility model;

[0038] Figure 19 This is a schematic diagram of the three-dimensional structure of the connector of the support base of Example 2 of the present utility model;

[0039] Figure 20 This is an exploded view of the connector of the support base in Example 2 of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0041] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0042] Example 1

[0043] Figures 1-15 A preferred embodiment of the simple lifting table of the present invention is shown. The lifting table includes a shelf 1, a tabletop assembly 3, a support base assembly, a handle 26, a drive rod 24 and a support rod assembly. The support rod assembly is connected to the bottom of the support base assembly to play a supporting role. The tabletop assembly 3 is installed on the support base assembly, and the shelf 1 is connected to the top of the support base 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.

[0044] 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 top 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. The sleeve 51 is sleeved on the outside of the column 22 of the support base 2 and fixed by fasteners. The bottom edge of the vertical plate 52 has a folded edge that is folded toward the side away from the table top (that is, toward the side close to the column 22), and the folded edge has a limiting notch 520 that is recessed toward the side away from the column 22 for the column 22 to be limited therein. 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 of the bottom of the vertical plate 52 abuts against the outer wall of the column 22, and 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 to the table top assembly 3. 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. A bolt 35 is connected to the side of the table top assembly 3. The head of the bolt 35 can extend from the large hole portion 5211 to the back of the connecting frame 5. After moving down to a set position, it forms a limit in the axial direction of the bolt 35 with the circumferential back of the small hole portion 5212. During disassembly, the table top assembly 3 is moved up to a position where the head of the bolt 35 is opposite to the large hole portion 5211 of the connection hole 521, and then it is removed from the large hole portion 5211 to complete disassembly.

[0045] Figures 8-10 The structure of the table top assembly 3 of this 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 therebetween. As their relative positions change, 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. In the folded state, the top surface of the first table top 31 fits in contact with the top surface of the second table top 32.

[0046] The bottoms of the first and second table boards 31, 32 are connected and fixed via a connecting pin 333. Specifically, the bottom of the first table board 31 has a downwardly protruding first block 331, which is provided with a first mounting hole 3310 extending along a first direction. The bottom of the second table board 32 has a downwardly protruding second block 332, which is provided with a second mounting hole 3320 extending along the first direction L1. When the first and second table boards 31, 32 are in the open state, the first mounting hole 3310 and the second mounting hole 3320 are opposite each other. The first mounting hole 3310 of the first block 331 is provided with a connecting pin 333 that is slidable along its length. The connecting pin 333 can be inserted into the second mounting hole 3320, thereby limiting the position of the first and second blocks 331, 332, and preventing the first and second blocks 31, 32 from rotating. 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.

[0047] 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.

[0048] Generally speaking, the connecting pin 333 can be installed into the corresponding installation channel from the port thereof, but considering that the connecting pin itself has a certain length, sufficient clearance space needs to be provided 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 is also provided on the bottom wall of the first protrusion 331, which is connected with the first installation channel 3310 and is used for the connecting pin 333 to be installed into the first installation channel 3310 and removed from the first installation channel 3310.

[0049] Both longitudinal sides of the first and second table tops 31, 32 extend along the second direction. The side where the first table top 31 meets the second table top 32 has a downwardly folded first edge 311, and the side away from the second table top 32 has a downwardly folded third edge 312. The side where the second table top 32 meets the first table top 31 has a downwardly folded second edge 321, and the side away from the first table top 31 has a downwardly folded fourth edge 322. The first protrusion 331 at the bottom of the first table top 31 meets the first edge 311, and the first mounting hole 3310 extends through the first edge 311, forming a corresponding port on the side wall of the corresponding first edge 311. The second protrusion 332 at the bottom of the second table top 32 meets the second edge 321, and the second mounting hole 3320 extends through the second edge 321, forming a corresponding port on the side wall of the corresponding second 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 in 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 .

[0050] In order to reduce production costs, in the preferred solution of this embodiment, the two adjacent table tops are designed to have the same structure, that is, the bottom of each table top (the first table top 31 and the second table top 32 mentioned above) has a first protrusion 331 and a second protrusion 332, wherein the first protrusion 331 and the second protrusion 332 on each table top are arranged at intervals in the first direction. Specifically, the second protrusion 332 at the bottom of the first table top 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 top 31. Similarly, the first protrusion 331 at the bottom of the second table top 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 top 32. Since the first table top 31 and the second table top 32 have the same structure, the first folded edge 311 of the first table top 31 can be understood as equivalent to the fourth folded edge 322 of the second table top 32, and the third folded edge 312 of the first table top 31 can be understood as equivalent to the second folded edge 321 of the second table top 32. The downwardly extending lengths of the first folded edge 311 and the third folded edge 312 of the first table top 31 gradually decrease from the middle of the length direction of the first table top 31 to the left and right sides. Similarly, the downwardly extending lengths of the second folded edge 321 and the fourth folded edge 322 of the second table top 32 also gradually decrease from the middle of the length direction of the second table top 32. 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 further 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 further provided with a second reinforcing rib 323 extending along the first direction.

[0051] like Figure 10 The diagram shows the structure in which the side of the first table top 31 of the table top assembly 3 is connected to the connecting frame 5 on the support base 2 via bolts 35. Specifically, there are two bolts 35, each of which passes through the second mounting channel 2203 of the second protrusion 332 at the bottom of the first table top 31 and is then restrained by a nut. This ensures that the head of the bolt 35 is at a certain distance from the third folded edge 312 of the first table top 31, allowing the head of the bolt 35 to pass through the large hole 5211 of the connecting hole 521, move downward, and engage in the small hole 5212 on the vertical plate 52 of the connecting frame 5.

[0052] See also Figure 8In this embodiment, the first table top 31 and the second table top 32 are rotatably connected in the adjacent area between them via a flexible patch 34 attached to the top surfaces of both. The aforementioned "flexible patch 34" refers to a patch structure that can bend and deform under the action of an external force. This flexible patch 34 allows the two joined objects to deflect relative to each other and form a certain angle. Generally speaking, the flexible patch 34 can be provided as a single section covering a portion of the joint, or as multiple sections spaced apart along the length of the joint, or as a complete strip along the length of the joint to completely obscure the joint. In a preferred embodiment, to ensure the aesthetics of the table top, the flexible patch 34 extends along the length of the joint between the first table top 31 and the second table top 32, obscuring the joint. The flexible patch 34 can be made of nylon carbon fiber, rubber, or silicone. The flexible patch 34 is attached to the top surface of the adjacent area between the first table top 31 and the second table top 32 by adhesive bonding.

[0053] See also Figure 11-14 The top of the column 22 of the support base 2 is a connector 220 for connecting to 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 above-mentioned 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 passes through 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 above-mentioned two positioning plates 11 jointly define a movable groove 112 for the connector 220 to be inserted into and can deflect 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 correspond to the first side wall 2201 and the second side wall 2202 of the connector 220.

[0054] The two positioning plates 11 have positioning recesses 110 arranged in sequence along the circumferential direction centered on the above-mentioned first rotating shaft 15 on the opposite side walls. Generally speaking, the "positioning recess 110" can 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 other structure, 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.

[0055] The connector 220 of the support base 2 is also provided with a positioning pin 221 that can move in a direction parallel to the first rotation axis 15. The positioning pin 221 is located below the first rotation axis 15 and is arranged adjacent to the first rotation axis 15. Specifically, the connector 220 has 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 separated 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 restrict the shelf 1 from rotating relative to the support base 2. This state is the locked state. The two positioning pins 221 can also be separated from each other and disengaged from the positioning recesses 110 of the two corresponding positioning plates 11 to release the lock between the shelf 1 and the support base 2. This state is the unlocked state.

[0056] An elastic member is also provided in the mounting 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 respectively abut against the two positioning pins 221, thereby ensuring that the two positioning pins 221 always have a tendency to move toward the side of the corresponding positioning plate 11. More specifically, the positioning pins 221 are designed as non-uniform pin shafts with a smaller outer diameter at the outer end and a larger 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 mounting channel 2203 of the connector 220. The step hole cooperates with the step portion 2101 of the positioning pin 221 to prevent the positioning pin 221 from completely dislodging from the mounting channel 2203.

[0057] See also Figure 13 and Figure 14In this embodiment, the mating structure between the end of the positioning pin 221 and the positioning recess 110 of the positioning plate 11 is configured such that when the shelf 1 is subjected to an external force and rotates about 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 cause the positioning pin 221 to disengage 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 having 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 cooperates with the concave arc surface of the positioning plate 11 to provide a certain guiding function. When a 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. As a result, the ball head structure 2210 of the positioning pin 221 can smoothly disengage the positioning recess 110 on the positioning plate 11, thereby achieving the purpose of adjusting the angle of the shelf 1. In order to ensure that the ball head structure 2210 of the positioning pin 221 can smoothly snap into the next adjacent positioning recess 110 after disengaging the positioning recess 110 on the positioning plate 11 when the shelf 1 is adjusted, 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.

[0058] 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.

[0059] The bottom of shelf 1 also has the hook 13 that extends forward and folds upwards, and hook 13 can be provided with two of left and right intervals.Hook 13 can be convenient to the article that is placed on shelf 1, as computer, mobile phone, ipd, portable screen etc. are supported at the bottom.On the other hand, in order to avoid the article that is placed on shelf 1 to fall forward, the top of shelf 1 is also provided with the front side that is positioned at this shelf 1 and extends along the left and right direction anti-falling bar 14, and the left and right sides sidewalls of shelf 1 offer jack, and the left and right ends of anti-falling bar 14 are arranged in two jacks on shelf 1.When placing article, article can be placed between anti-falling bar 14 and the front sidewall of shelf 1.The elastic cord, rubber band etc. that above-mentioned anti-falling bar 14 can adopt have certain elastic rope, also can adopt metal bar (as stainless steel), plastic strip etc. with certain strength, non-stretchable.

[0060] The support base 2 defines a vertically extending movable channel 210 and an movable chamber 211 connected to the lower end of the movable channel 210. Specifically, the movable chamber 211 is correspondingly formed within the base body 21 of the support base 2, and the interior of the column 22 of the support base 2 is hollow to form the movable channel 210. The handle 26 is configured to be connected to the column 22 of the support base 2 in a movable manner, and the drive rod 24 is arranged in the movable channel 210 so as to be movable up and down. The lower end of the drive rod 24 extends into the movable chamber 211. The drive rod 24 is linked to the handle 26 and can be driven downward by the handle 26. Specifically, the column 22 has a transmission shaft 252 that extends horizontally through the movable channel 210. The end of the transmission shaft 252 extends outside 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 about its axis. A cam 251 is further provided within 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 drive 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 drive rod 24 to move downward.

[0061] The movable channel 210 of the column 22 is also provided with an elastic member, which acts on the drive rod 24 and causes the drive rod 24 to always have a tendency to move upward along the movable channel 210. Specifically, the inner wall of the movable channel 210 defines a stepped portion 2101 that is larger at the top and smaller at the bottom, and the outer peripheral wall of the drive rod 24 has a radially outwardly projecting stopper 2410. The elastic member can be a third spring 27, which is sleeved outside the drive rod 24, with its upper end abutting against the stopper 2410 of the drive rod 24 and its lower end abutting against the stepped portion 2101 of the movable channel 210. When the handle 26 is not operated or released, the drive rod 24 can automatically move upward under the action of the third spring 27, that is, away from the operating portion of the support rod 4, thereby achieving the purpose of automatically locking the support rod 4 (the length cannot be adjusted).

[0062] The base body 21 of the support base 2 is connected and fixed to the bottom of the column 22 by a 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.

[0063] The drive rod 24 includes a rod body 241 and a transmission block 242 connected to the lower end of the rod body 241. The transmission block 242 is threadedly connected to the rod body 241. The transmission block 242 is located within the movable chamber 211 of the base body 21. To facilitate the installation of the transmission block 242 and the connection between the base body 21 and the column 22, the base body 21 has an opening at the bottom and a bottom cover 210 connected to the opening.

[0064] 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 telescopically adjusted. When the locking assembly is in the unlocked state, the length of the support rod 4 can be telescopically adjusted. The upper end of the support rod 4 is connected to the support seat 2 and extends into the movable 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.

[0065] The support rod 4, which is equipped with a locking device and can be unlocked and locked at the end, generally includes an outer tube 42 and an inner tube 41 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 41. The locking assembly is configured to lock the above-mentioned outer tube 42 and 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 and 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.

[0066] See also Figure 7 To achieve synchronous unlocking of the support rods 4, the transmission block 242 of this embodiment is a disk structure with a downwardly protruding center. The bottom surface of the disk structure is constructed as a concave curved surface 2420 that gradually recesses upward from the center toward the periphery. The upper ends of the three support rods 4 of the support rod assembly are arranged sequentially 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 three support rods 4, the transmission block 242 has three pressure arms 2421 extending outward from the center. The bottom surface of each pressure arm 2421 is constructed with the aforementioned concave curved surface 2420. The upper end of each support rod 4 correspondingly abuts against the concave curved surface 2420 of each pressure arm 2421. It is conceivable that the transmission block can also be designed as a complete disk without any notches or recesses in the circumferential direction. The 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.

[0067] The movable chamber 211 of the support base 2 includes at least two sub-chambers 2110 arranged in sequence along the circumference. The bottom of the support base 2 also has a radially extending movable opening 2111 in the area corresponding to each movable groove 112. The upper end of each support rod 4 extends through the movable opening 2111 into the corresponding sub-chamber 2110. The upper end of each support rod 4 is rotatably connected to the support base 2 via a second rotating shaft 40. The extension direction of the second rotating shaft 40 is consistent with the width direction of the movable opening 2111. In other words, 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 base 2, they have a collapsed state in which the lower ends of the support rods 4 are relatively close together and collapsed, and an expanded state in which the lower ends of the support rods 4 are relatively separated and expanded. In the collapsed 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 base 2 is supported by three rods at the bottom, which is more firm and stable.

[0068] 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 adapted to the concave curved 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 on the concave curved 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 arcuate plate 44 (i.e., the side facing the main body of the support rod 4) has an inner recess 440. An operating lever is provided within the support rod 4, which is movable along its length. The end of the operating lever extends beyond the upper end of the support rod 4 and abuts against the inner recess 440 of the arcuate plate 44. The operating lever of this embodiment functions in the same manner as the linkage lever described in "Locking Mechanism, Support Rod Assembly, and Support Device" (Application No. CN201621304135.8).

[0069] When the lifting table needs to be used, 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, support for components such as the table top 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 and folded together. After the support rods 4 are folded, they occupy a small volume and can be stored or carried more conveniently.

[0070] Example 2

[0071] Figures 16-20 Another preferred embodiment of the lifting table of the present invention 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 base 2 is different. Specifically, in this embodiment, the support base 2 is further provided with two operating handles 222 respectively connected to the two positioning pins 221 and capable of driving the positioning pins 221 to move between the unlocked position and the locked position. Correspondingly, the positioning recess 110 on the positioning plate 11 of the shelf 1 can adopt a through hole structure that penetrates the outer wall surface of the positioning plate 11. Of course, a pit structure can also be adopted as in embodiment 1.

[0072] See also Figure 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 to the operating handle 222, the operating handle 222 can also play a role in 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.

[0073] The main body of shelf 1 is provided with an operating opening 10 extending from front to back. Two operating handles 222 extend downward to the back of the area where the operating opening 10 is located and are visible through the operating opening 10 from the front of shelf 1. This allows the user to directly operate the operating handles 222 through the operating opening 10 on the main body of shelf 1, improving the user experience. In a preferred embodiment, the two operating handles 222 are arranged adjacent to each other, specifically, the distance between them is configured to be suitable for single-handed operation.

[0074] The elastic member in this embodiment is a second spring 232, which is positioned between the two operating handles 222 and ensures that the two operating handles 222 always tend to move away from each other. A guide rod 12 is positioned between the two operating handles 222, and the two operating handles 222 each have a through hole extending left and right, through which the guide rod passes. The guide rod 12 includes a radially outward-projecting stop flange 121 at its center, and two guide segments 122 located on either side of the stop flange 121. The two guide segments 122 are respectively inserted into the through holes of the two operating handles 222. Two second springs 232 are provided, each mounted on the two guide segments 122 of the guide rod 12 and resting between the stop flange and the corresponding operating handle 222.

[0075] To facilitate the installation of components such as the positioning pin 221 and the operating handle 222, the front sidewall of the connector 220 of the support base 2 is provided with an opening that extends through the installation channel 2203. A cover plate 2204 is screwed to the opening. After the positioning pin 221 and other components are assembled, the cover plate 2204 can be closed to prevent the positioning pin 221 from falling out of the front opening.

Claims

1. A simple lifting table, comprising: Tabletop assembly (3); A support base (2), the table top assembly (3) being connected to the support base (2); It is characterized by also including: A support rod assembly is connected to the bottom of the support base (2), and includes at least three support rods (4) with adjustable lengths. The upper end of each support rod (4) is rotatably connected to the support base (2), and has a folded state in which the lower ends of each support rod (4) are relatively close to each other and folded together, and an expanded state in which the lower ends of each support rod (4) are relatively far apart and expanded.

2. The simple lifting table according to claim 1, characterized in that: The support seat (2) comprises a seat body (21) and a column (22) extending upward from the seat body (21), and the side of the table top assembly (3) is connected to the column (22).

3. The simple lifting table according to claim 2, characterized in that: The utility model further comprises a connecting frame (5) connected to the column (22), wherein the connecting frame (5) comprises a sleeve (51) sleeved and connected to the outside of the column (22) and a vertical plate (52) extending downward from the sleeve (51), and the vertical plate (52) has two connecting holes (521) arranged side by side, and each connecting hole (521) comprises a large hole portion (5211) and a small hole portion (5212) arranged in sequence from top to bottom and connected to each other, and a bolt (35) is connected to the side of the table top assembly, and the head of the bolt (35) can extend from the large hole portion (5211) to the back side of the connecting frame (5), and after moving down to a set position, it forms a limit with the back side of the peripheral edge of the small hole portion (5212) in the axial direction of the bolt (35).

4. The simple lifting table according to claim 3, characterized in that: The bottom edge of the vertical plate (52) has a folded edge that is folded toward a side away from the table top assembly (3), and the folded edge has a limiting notch (520) that is recessed toward a side away from the column (22) for the column (22) to be limited therein.

5. The simple lifting table according to claim 1, characterized in that: The bottom of the support seat (2) has at least three movable openings (2111) arranged in sequence along the circumference with the vertical straight line as the center and extending radially, and the upper end of each support rod (4) is rotatably connected to the corresponding movable openings (2111) of the support seat (2).

6. The simple lifting table according to any one of claims 1 to 5, characterized in that: The table top assembly (3) includes at least two table tops arranged in sequence along a first direction, and the two adjacent table tops are respectively recorded as a first table top (31) and a second table top (32). The first table top (31) and the second table top (32) are rotatably connected in the adjacent area between the two, and 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.

7. The simple lifting table according to claim 6, characterized in that: The bottom of the first table board (31) has a first protrusion (331) protruding downward, and the first protrusion (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 protrusion (332) protruding downward, and the second protrusion (332) is provided with a second mounting hole (3320) extending along the first direction. 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 to each other. The first mounting hole (3310) is also provided with a connecting pin (333) that can slide along the second direction. The connecting pin (333) can be inserted into the second mounting hole (3320) and moved out of the second mounting hole (3320). The above-mentioned second direction is perpendicular to the first direction.

8. The simple lifting table according to claim 7, characterized in that: The first table top (31) and the second table top (32) are rotatably connected in adjacent areas thereof via a flexible patch (34) attached to the top surfaces of both.

9. The simple lifting table according to any one of claims 2 to 4, characterized in that: It also includes a shelf (1), which is connected to the top of the column (22) through a first rotating shaft (15) extending left and right and is rotatably connected in an angle-adjustable manner.

10. The simple lifting table according to claim 9, characterized in that: The back of the shelf (1) is provided with a positioning plate (11) extending backward, and the positioning plate (11) is provided with positioning recesses (110) arranged in sequence along a circumferential direction centered on the first rotating shaft (15), and the support seat (2) is provided with a positioning pin (221) that can move in a direction parallel to the first rotating shaft (15), and the positioning pin (221) can be inserted into the positioning recess (110) on the positioning plate (11) to limit the shelf (1) from rotating relative to the support seat (2) in a locked state as its moving position changes, and can be released from the positioning recess (110) on the positioning plate (11) to allow the shelf (1) to rotate relative to the support seat (2) in an unlocked state.

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