A table and chair lifting conversion device

Abstract

The utility model discloses a table and chair lifting conversion device, including base, mesa and air pressure lifting rod, base includes bottom plate, and the bottom plate top is equipped with the tubular base side plate, and two recessed clamping slots are symmetrically equipped with to two sides of base side plate, and one side inner wall on the one side of base side plate is equipped with the backrest, and the side plate upper edge of one clamping slot is equipped with base operation hole, mesa includes top plate, and the top plate is equipped with the backrest groove for the backrest to pass through, and the top plate below is equipped with two mesa outer side plate and two mesa inner side plate, and two mesa outer side plate can be inserted into the clamping slot simultaneously or rest on the side plate of base side plate convex simultaneously, and two mesa inner side plate can enter the inside of base side plate cylinder simultaneously, and the upper edge of one mesa outer side plate is equipped with mesa operation hole with base operation hole cooperation, and bottom plate and top plate are connected through air pressure lifting rod. The device simple structure, low in cost, the assembly is few, and the convenience is high, and the deformation is convenient, and easy to use, and the stability is high.

Description

Technical Field

[0001] This utility model relates to the field of urban furniture technology, specifically to a table and chair lifting and conversion device. Background Technology

[0002] Urban public space refers to open spaces within a city or urban cluster, serving as open venues for urban residents to engage in public interactions and various activities. Tables and chairs in urban public areas are a core component of public facilities, typically consisting of linearly arranged benches or individual square / round table combinations, suitable for short rests during walks. However, traditional urban table and chair combinations are functionally limited, have fixed installation locations, and are costly.

[0003] The land area of ​​a river channel is a type of urban public space, specifically referring to the strip-shaped area extending outward along both sides of the river mouth. It is generally long and narrow with irregular terrain (such as slopes and embankment bends). It needs to fulfill three functions: flood control channel, ecological maintenance, and space for citizens' leisure activities. For example, flood control facilities, patrol channels, green belts and other facilities need to be laid out here. If traditional fixed urban table and chair sets are installed in this area, there are the following drawbacks: (1) large land area and low economic benefits; (2) fixed location, unable to be arranged flexibly and at will, lack of flexible expansion of seating capacity, reducing the inclusiveness of public space and limiting people's experience of use and leisure.

[0004] The invention patent with announcement number CN 107048774 B provides a height-adjustable table and chair, which includes a height-adjustable base module and a table and chair surface module. The height-adjustable base module includes multiple circular segments stacked in descending order of size. The circular segments can move closer together or further apart to change the height of the height-adjustable base module. The uppermost circular segment is connected to a connector. The table and chair surface module includes a bottom plate, at least one middle plate, and a top plate. The bottom plate, the middle plate, and the top plate can be stacked vertically to form a multi-layered chair surface, or they can be rotated and spliced ​​in a circular direction to form a continuous tabletop. The connector is slidably disposed on the bottom plate. When the connector slides to the inner side of the bottom plate, it can serve as a chair support leg. When the connector slides to the top of the bottom plate, it can serve as a table support leg. This height-adjustable table and chair can be flexibly transformed, serving as both a table and a chair. However, the height-adjustable base module consists of multiple circular segments, and the table and chair surface module consists of multiple panels, resulting in a complex structure. The connection between the table and chair surface module and the uppermost circular segment of the base module has a small connection area, leading to insufficient stability.

[0005] Utility model patent CN 218044353 U discloses a table-chair interchangeable device. This device includes a main board with a storage slot containing a desktop mechanism. Support legs are mounted at the four corners of the main board's bottom. Two pairs of fixing plates are fixedly mounted on one side of the main board's bottom, with a backrest mechanism rotatably mounted between the plates via pins. When both the desktop and backrest mechanisms are folded down, adjusting the height of the support legs allows the device to function as a backless stool. Unfolding the desktop mechanism transforms it into a long table. Folding down the desktop mechanism and raising the backrest mechanism transforms it into a chair with a backrest. This device can be interchanged between a table, stool, and chair. However, the device has many components, a complex structure, and high production costs. Utility Model Content

[0006] The purpose of this utility model application is to address the shortcomings of the above-mentioned technology by providing a table and chair lifting and conversion device. This device has a simple structure, low cost, few components, and high convenience. The table and chair conversion can be completed through simple operation, and it is easy to transform and use. The table and chair have good stability in both states. This device is applicable to river and land areas.

[0007] To achieve the above objectives, the table and chair lifting and conversion device provided by this utility model adopts the following technical solution: A table and chair height adjustment device includes a base, a tabletop, and a pneumatic lifting rod. The base includes a base plate with cylindrical base side plates on top. Two concave slots are symmetrically arranged on opposite sides of the base side plates. A backrest is provided on the inner wall of one of the convex sides of the base side plates. A base operation hole is provided on the upper edge of one of the slots on the side plate. The tabletop includes a top plate with a backrest slot for the backrest to pass through. Two outer tabletop plates and two inner tabletop plates are located below the top plate. The two outer tabletop plates can simultaneously engage with the slots or rest on the convex side plates of the base side plates. The two inner tabletop plates can simultaneously enter the cylindrical base side plate. A tabletop operation hole, matching the base operation hole, is provided on the upper edge of one of the outer tabletop plates. The base plate and top plate are connected by the pneumatic lifting rod, which includes a handle operated through the base operation hole and the tabletop operation hole. By adopting this technical solution, when both outer side panels of the tabletop are simultaneously inserted into the slots, and both inner side panels of the tabletop are inserted into the base side plate cylinder, the backrest passes through the backrest groove, and the base and tabletop fit together to form a chair. By pressing the handle through the base operation hole and the tabletop operation hole, the pneumatic lifting rod can lift the tabletop, the backrest exits the backrest groove, and by rotating the tabletop, the outer side panel of the tabletop can rest on the side plate of the protruding part of the base side plate to form a table.

[0008] Optionally, the base side plate is cylindrical, the slot is arc-shaped with an indentation depth the same as the thickness of the base side plate, the outer side plate of the platform is arc-shaped with a radius the same as the radius of the convex portion of the base side plate, the thickness of the outer side plate of the platform is the same as the thickness of the base side plate, and the inner side plate of the platform is arc-shaped with a radius smaller than the inner wall radius of the side plate at the indentation of the slot. By adopting this technical solution, the base and platform fit tightly, increasing the stability of the device.

[0009] Optionally, the backrest is arc-shaped with the same radius as the side plate at the recess of the slot, the backrest thickness is the same as the base side plate thickness, and the backrest slot is arc-shaped. By adopting this technical solution, the design style of the device is more unified.

[0010] Optionally, the arc lengths of the two protruding side plates of the base and the arc length of the side plate at the slot are both / circumference, and the arc lengths of the outer side plate, inner side plate, and backrest are all / circumference. By adopting this technical solution, the locking sleeves of the base and the tabletop fit tightly in the chair state, increasing the stability of the device.

[0011] Optionally, the operating holes on the base and the tabletop have the same structural dimensions, both being U-shaped. This design makes operating the handle more convenient.

[0012] Optionally, the base side plate, the outer tabletop plate, and the inner tabletop plate are all the same height. By adopting this technical solution, in the chair position, the base side plate can support the top plate, and the outer and inner tabletop plates can support the bottom plate, increasing stability.

[0013] Optionally, the height of the backrest is a multiple of the height of the base side panel. By adopting this technical solution, in the table position, the backrest is located below the top panel.

[0014] Optionally, the height of the base side plate, the outer side plate of the tabletop, and the inner side plate of the tabletop are all 500mm, and the height of the backrest is 1000mm.

[0015] The beneficial effects achieved by this utility model are: 1. The device consists of only three components: a base, a platform, and a pneumatic lifting rod, thus its structure is simple and its cost is low; 2. This device has few components and is highly convenient; 3. The table and chair conversion is simple and easy to perform, making it convenient and user-friendly; 4. The tables and chairs are in good stability. Attached Figure Description

[0016] Figure 1aThis is an overall schematic diagram of the table and chairs of this utility model in one usage state; Figure 1b This is an overall schematic diagram of another usage state of the table and chairs of this utility model; Figure 2 This is a partial structural diagram of the base of this utility model; Figure 3 This is a top view of a partial structure of the base of this utility model; Figure 4 This is a partial structural diagram of the tabletop of this utility model; Figure 5 This is a bottom view of a partial structure of the tabletop of this utility model; Figure 6 This is a partial structural schematic diagram of the pneumatic lifting rod of this utility model; Figure 7 This is a schematic diagram of the table and chair conversion process of this utility model; The components are: 1. Base; 11. Base plate; 12. Base side plate; 13. Slot; 14. Backrest; 15. Base operation hole; 2. Tabletop; 21. Top plate; 22. Tabletop outer side plate; 23. Tabletop inner side plate; 24. Tabletop operation hole; 25. Backrest slot; 3. Pneumatic lifting rod; 31. Handle. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] The following is in conjunction with the appendix Figures 1a-7 The present invention will be described in further detail below.

[0019] like Figures 1a-1b As shown, a table and chair lifting and conversion device includes a base 1, a tabletop 2, and a pneumatic lifting rod 3.

[0020] like Figure 2 As shown, the base 1 includes a base plate 11, and a cylindrical base side plate 12 is provided on the top of the base plate 11. The base side plate 12 has two concave slots 13 symmetrically arranged on two opposite sides. A backrest 14 is provided on the inner wall of one of the two convex sides of the base side plate 12. A base operation hole 15 is provided on the upper edge of one of the slots 13.

[0021] like Figure 4As shown, the tabletop 2 includes a top plate 21, on which a backrest groove 25 is provided for the backrest 14 to pass through. Below the top plate 21, there are two outer tabletop plates 22 and two inner tabletop plates 23. The two outer tabletop plates 22 can be simultaneously inserted into the slots 13 or simultaneously rested on the protruding side plates of the base side plate 12. The two inner tabletop plates 23 can simultaneously enter the interior of the base side plate 12 cylinder. One of the outer tabletop plates 22 has a tabletop operation hole 24 on its upper edge that mates with the base operation hole 15.

[0022] like Figure 6 , 7 As shown, the base plate 11 and the top plate 21 are connected by the pneumatic lifting rod 3. The pneumatic lifting rod 3 includes a handle 31, which is operated through the base operation hole 15 and the table operation hole 24.

[0023] like Figure 3 , Figure 5 As shown, the base side plate 12 is cylindrical, the slot 13 is arc-shaped and its concave depth is the same as the thickness of the base side plate 12, the outer side plate 22 of the tabletop is arc-shaped and its radius is the same as the radius of the side plate of the convex portion of the base side plate 12, and the thickness of the outer side plate 22 of the tabletop is the same as the thickness of the base side plate 12, the inner side plate 23 of the tabletop is arc-shaped and its radius is smaller than the inner wall radius of the side plate of the concave portion of the slot 13; the backrest 14 is arc-shaped and its radius is the same as the radius of the side plate of the concave portion of the slot 13, the thickness of the backrest 14 is the same as the thickness of the base side plate 12, and the backrest groove 25 is arc-shaped; the arc length of the two convex side plates of the base side plate 12 and the arc length of the side plate at the slot 13 are both 1 / 4 of the circumference, and the arc length of the outer side plate 22, the inner side plate 23 of the tabletop, and the backrest 14 are all 1 / 4 of the circumference.

[0024] like Figure 7 As shown, the base operation hole 15 and the tabletop operation hole 24 have the same structural dimensions and are both U-shaped; the base side plate 12, the tabletop outer side plate 22, and the tabletop inner side plate 23 have the same height; the height of the backrest 14 is twice the height of the base side plate 12; the height of the base side plate 12, the tabletop outer side plate 22, and the tabletop inner side plate 23 are all 500mm, and the height of the backrest 14 is 1000mm.

[0025] In this embodiment, a table and chair lifting and conversion device includes three parts: a base 1, a tabletop 2, and a pneumatic lifting rod 3, all of which are made of metal. The backrest 14 of the base 1 is 1000mm high, the height of the other components is 500mm, and the height of the tabletop 2 is 500mm.

[0026] like Figure 7 As shown, the operation steps of this utility model embodiment are as follows: 1. When transforming from chair form to table form, manually press handle 31 through base operation hole 15 and tabletop operation hole 24 to open the air valve in the cylinder. At this time, the compressed nitrogen in the cylinder is released, driving the piston to move, causing the air pressure lifting rod 3 to push the tabletop 2 upward. When the tabletop 2 rises to the top, release handle 31, and then manually rotate the tabletop 2 90 degrees clockwise. The tabletop 2 is placed on the base 1, so that the table form after transformation can be stable. 2. When transforming from table mode to chair mode, first rotate tabletop 2 counterclockwise by 90 degrees so that the outer side plate 22 of tabletop 2 is aligned with the slot 13 of base 1. At this time, manually press the air valve control handle 31 to open the cylinder air valve and apply appropriate downward pressure to tabletop 2. Manually press tabletop 2 down to the bottom and release the air valve handle 31 at the same time so that tabletop 2 and base 1 are nested together to form chair mode.

[0027] It should be noted that the above description of the technical solutions is exemplary, and this specification may be embodied in different forms and should not be construed as limiting it to the technical solutions set forth herein. Rather, providing these descriptions will ensure that the disclosure of this utility model is thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of this utility model are defined only by the scope of the claims.

[0028] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and the above structures should all be considered to fall within the protection scope of this utility model.

Claims

1. A table and chair lifting and conversion device, characterized in that: Includes a base (1), a tabletop (2), and a pneumatic lifting rod (3); The base (1) includes a base plate (11), and a cylindrical base side plate (12) is provided above the base plate (11). The base side plate (12) has two concave slots (13) symmetrically arranged on two opposite sides. A backrest (14) is provided on the inner wall of one of the two convex sides of the base side plate (12). A base operation hole (15) is provided on the upper edge of one of the slots (13). The tabletop (2) includes a top plate (21), on which a backrest groove (25) is provided for the backrest (14) to pass through. Two outer tabletop plates (22) and two inner tabletop plates (23) are provided below the top plate (21). The two outer tabletop plates (22) can be simultaneously inserted into the slot (13) or simultaneously placed on the protruding side plate of the base side plate (12). The two inner tabletop plates (23) can simultaneously enter the inside of the base side plate (12) cylinder. One of the outer tabletop plates (22) has a tabletop operation hole (24) on its upper edge that matches the base operation hole (15). The base plate (11) and the top plate (21) are connected by the pneumatic lifting rod (3), which includes a handle (31) and is operated through the base operation hole (15) and the table operation hole (24).

2. The table and chair lifting and conversion device according to claim 1, characterized in that: The base side plate (12) is cylindrical, the slot (13) is arc-shaped and its concave depth is the same as the thickness of the base side plate (12), the outer side plate (22) of the table surface is arc-shaped and its radius is the same as the radius of the side plate of the convex part of the base side plate (12), the thickness of the outer side plate (22) of the table surface is the same as the thickness of the base side plate (12), and the inner side plate (23) of the table surface is arc-shaped and its radius is smaller than the inner wall radius of the side plate of the concave part of the slot (13).

3. The table and chair lifting and conversion device according to claim 2, characterized in that: The backrest (14) is arc-shaped and its radius is the same as the radius of the side plate at the recess of the slot (13). The thickness of the backrest (14) is the same as the thickness of the side plate (12) of the base. The backrest groove (25) is arc-shaped.

4. The table and chair lifting and conversion device according to claim 3, characterized in that: The arc length of the two protruding side plates of the base side plate (12) and the arc length of the side plate at the slot (13) are both 1 / 4 of the circumference. The arc length of the outer side plate (22), the inner side plate (23) of the tabletop and the backrest (14) are all 1 / 4 of the circumference.

5. The table and chair lifting and conversion device according to claim 1, characterized in that: The base operation hole (15) and the tabletop operation hole (24) have the same structural dimensions, both being U-shaped.

6. A table and chair lifting and conversion device according to any one of claims 1-5, characterized in that: The base side plate (12), the outer side plate (22) of the tabletop, and the inner side plate (23) of the tabletop are all at the same height.

7. A table and chair lifting and conversion device according to claim 6, characterized in that: The height of the backrest (14) is twice the height of the base side plate (12).

8. A table and chair lifting and conversion device according to claim 7, characterized in that: The height of the base side plate (12), the outer side plate (22) of the tabletop and the inner side plate (23) of the tabletop are all 500mm, and the height of the backrest (14) is 1000mm.

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