CN211748218U

CN211748218U - Director chair with rotary table top board

Info

Publication number: CN211748218U
Application number: CN202020337591.2U
Authority: CN
Inventors: 朱晓辉; 郑雪峰
Original assignee: Zhejiang Sunshine Leisure Products Co ltd
Current assignee: Zhejiang Sunshine Leisure Products Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-10-27
Anticipated expiration: 2030-03-17

Abstract

The utility model provides a director chair of desktop board is rotated in area, including the chair frame and set up the desktop board device on the chair frame, the desktop board device includes fixed pipe, fixing base, latch mechanism and the connecting piece of desktop board, the fixing base is fixed to be set up on the chair frame, the fixed pipe of desktop board has the standpipe that sets up perpendicularly mutually and violently manages, the rotatable fixed of standpipe is inserted and is located on the fixing base, violently wear to locate in the desktop board, just the desktop board is with violently managing to realize the upset as the pivot, latch mechanism slidable fixed set up in on the standpipe, the both ends of connecting piece articulate respectively latch mechanism with on the desktop board. The position of the table top plate can be well adjusted according to actual requirements.

Description

Director chair with rotary table top board

Technical Field

The utility model relates to a seat field, concretely relates to director's chair of desktop board is rotated in area.

Background

Most of the existing director chairs in the market are provided with side tables, the desktop plates are arranged on the side surfaces of the chairs, the functions are single, articles can be placed only, and when a user sits on the director chair and wants to use a notebook to record or work, the user is very inconvenient to use the desktop plates arranged on the side edges.

Therefore, in the existing director chair structure, there is also a director chair that has a table top installed in front of the chair, such as the one disclosed in patent application No. 201310006878.1, in which the table top is installed in front of the seat, but the installed table top cannot be rotated, and only a working state of being fixed in the horizontal direction is provided, which also brings great limitation to the user.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a director's chair of desktop board is rotated in area can be fine according to the position of the adjustment desktop board of actual demand.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

the utility model provides a director chair of desktop board is rotated in area, includes the chair frame and sets up the desktop board device on the chair frame, the desktop board device includes desktop board, the fixed pipe of desktop, fixing base, latch mechanism and connecting piece, the fixing base is fixed to be set up on the chair frame, the fixed pipe of desktop has the standpipe that sets up mutually perpendicularly and violently manages, the rotatable fixed of standpipe is inserted and is located on the fixing base, violently wear to locate in the desktop board, just the desktop board uses violently the pipe to realize the upset as the pivot, latch mechanism slidable fix set up in on the standpipe, the both ends of connecting piece articulate respectively latch mechanism with on the desktop board.

Further, be equipped with the elasticity projection of scalable activity on the standpipe of the fixed pipe of desktop, the upper surface of fixing base is seted up and is supplied the standpipe of the fixed pipe of desktop to insert the slot of establishing, the slotted hole of stepping down of the upper end position of a plurality of bayonets and the intercommunication a plurality of bayonets that link up to the slot is still seted up to the week side of fixing base, the standpipe of the fixed pipe of desktop is inserted and is located in the slot to realize fixedly through the cooperation of elasticity projection and bayonet socket, and realize the rotation of the fixed pipe of desktop through stepping down of arc breach to the elasticity projection.

Furthermore, an assembly groove is formed on the peripheral side surface of the fixed seat, and the fixed seat is fixedly connected with the chair frame through the assembly groove.

Furthermore, the assembly groove is composed of two opposite convex walls protruding outwards from the peripheral side surface of the fixing seat, a plurality of groups of first connecting holes corresponding to each other are formed in the two convex walls, a second connecting hole corresponding to the first connecting hole is formed in the chair frame, and the assembly groove further comprises a fixing piece, wherein the fixing piece is connected in the corresponding first connecting hole and the second connecting hole in a penetrating mode.

Further, trepanning and round pin post are formed on the latched device, the round pin post is set up to stretch out to the trepanning and return and switch over between breaking away from the trepanning, but the standpipe movably cup joints in the trepanning, the pinhole has still been seted up on the standpipe, when the round pin post returns to the position that breaks away from the trepanning, can slide between latched device and the standpipe relatively, the round pin post corresponds the pinhole on the standpipe and stretches out to when inserting the pinhole, realizes fixedly between latched device and the standpipe.

Furthermore, one or more pin holes are formed in the vertical pipe along the length direction of the vertical pipe.

Further, the locking device specifically includes: the sleeve comprises a sleeve main body with the trepanning, an inner sliding block, an elastic piece and a pin column, wherein the sleeve main body is also provided with an inner cavity which is vertical to the trepanning and is provided with an opening, the inner sliding block can be matched in the inner cavity in a sliding manner, the inner sliding block is provided with a long groove through hole corresponding to the trepanning, the pin column is fixed on the inner sliding block and protrudes towards the long groove through hole, the elastic piece is arranged in the inner cavity, and when the sleeve main body slides to enable the pin column on the inner sliding block to correspond to a pin hole of the vertical pipe, the elastic piece drives the inner sliding block to slide, so that the pin column is inserted into; and pressing the inner slide block to enable the pin column to retract to be separated from the pin hole of the vertical pipe.

Furthermore, the outer periphery of the sleeve main body is also provided with a connecting wing plate which protrudes outwards, and the connecting piece is hinged on the connecting wing plate.

Furthermore, the chair frame is a foldable chair frame.

Furthermore, the chair frame comprises two side frames and two U-shaped seat pipes, the two side frames are arranged oppositely, the middle positions of the two U-shaped seat pipes are hinged, an X-shaped folding frame is further formed, the X-shaped folding frame is arranged between the two side frames, the end portions of the X-shaped folding frame are hinged to the two side frames respectively, and the desktop board device is arranged on one of the side frames.

Through the utility model provides a technical scheme has following beneficial effect:

the desktop plate can realize the rotation switching between the side parts in front of the seat through the rotatable connection of the vertical pipes of the desktop fixing pipes; the transverse pipe is used as a rotating shaft to realize vertical overturning, and the desktop plate is fixed in an overturning way through the desktop fixing pipe, the locking mechanism and the connecting piece, namely when the locking mechanism is fixed on the vertical pipe, the desktop fixing pipe, the connecting piece and the desktop plate form a triangular fixing structure to realize the fixation of the desktop plate, and a user can correspondingly adjust the position of the desktop plate according to actual requirements.

Drawings

Figure 1 is a first schematic view of a director's chair with a rotatable table top in an unfolded state according to an embodiment;

figure 2 is a second schematic view of the director's chair with a rotatable table top in an unfolded state according to an embodiment;

figure 3 is a third schematic view of the director's chair with a pivotable table top in an unfolded position in accordance with an exemplary embodiment;

figure 4 is a fourth schematic view of the director's chair with a pivotable table top in an unfolded position in accordance with the embodiments;

figure 5 is a schematic view of a director's chair with a pivotable table top in an exemplary embodiment in a folded configuration;

figure 6 is a schematic diagram illustrating the structure of the table top assembly in accordance with an exemplary embodiment;

figure 7 illustrates a structural view of the table top in an exemplary embodiment;

FIG. 8 is a schematic structural view of a table top fixing tube in the embodiment;

FIG. 9 is a schematic structural view of the fixing base in the embodiment;

FIG. 10 is an exploded view of the latch mechanism of the exemplary embodiment;

FIG. 11 is a schematic structural view of a sleeve body of the latch mechanism of the embodiment;

fig. 12 is a schematic structural view of an inner slide block of the latch mechanism according to the embodiment.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 12, the director chair with a rotatable table top according to the present embodiment includes a chair frame 10 and a table top device disposed on the chair frame 10, wherein the table top device includes a table top 21, a table top fixing tube 22, a fixing seat 23, a locking mechanism 24 and a connecting member 25, the fixing seat 23 is fixedly disposed on the chair frame 10, the table top fixing tube 22 has a vertical tube 221 and a horizontal tube 222 that are vertically disposed, that is, are in an inverted "L" shape, the vertical tube 221 is rotatably fixed to the fixing seat 23, the horizontal tube 222 is disposed in the table top 21, and the table top 21 is turned over by using the horizontal tube 222 as a rotating shaft, specifically, a through hole 211 is disposed on the table top 21, and the horizontal tube 222 is rotatably disposed in the through hole 211 of the table top 21. The locking mechanism 24 is slidably and fixedly disposed on the vertical tube 221, and two ends of the connecting member 25 are respectively hinged to the locking mechanism 24 and the table top 21.

The desktop plate 21 of the scheme can realize the rotation switching between the front and the side of the seat through the rotatable connection of the vertical pipe 221 of the desktop fixing pipe 22; and the horizontal tube 222 is used as a rotating shaft to realize the up-and-down turning, and the turning and fixing of the desktop plate 21 are realized through the desktop fixing tube 22, the locking mechanism 24 and the connecting piece 25, that is, when the locking mechanism 24 is fixed on the vertical tube 221, the desktop fixing tube 22, the connecting piece 25 and the desktop plate 21 form a triangular fixing structure, so as to realize the fixing of the desktop plate 21. A user can adjust the position of the table top 21 according to actual requirements, as shown in fig. 1, when the table top is needed, the vertical tube 221 is used as a rotating shaft to rotate the table top 21 to the front of the seat, and then the table top 21 is turned to be approximately flat, the locking mechanism 24 and the vertical tube 221 form a fixed connection to fix the table top 21, and the user can do notes and other works well when sitting on the position. When the desktop plate 21 is not needed, the fixed connection between the locking mechanism 24 and the vertical pipe 221 is released, that is, the locking mechanism 24 can slide up and down relative to the vertical pipe 221, so as to release the fixation of the desktop plate 21, and the desktop plate 21 can be turned over, as shown in fig. 2, when the desktop plate 21 is turned over; figure 3 illustrates the table top 54 flipped over to an upright position. The table top 54 is then pivoted to the side of the seat about the vertical leg 554, as shown in figure 4, so as not to interfere with the user's rising or the like.

Further, in this embodiment, as shown in fig. 8, the vertical tube 221 and the horizontal tube 222 are an integral connecting structure, and are formed by bending a long tube, so that the structure is simple and convenient to prepare, and has good supporting capability. Of course, in other embodiments, an assembly structure may be used, such as inserting two pipes into a two-way member with a vertical opening.

Preferably, in this embodiment, the vertical tube 221 of the table top fixing tube 22 is provided with a flexible elastic protruding column 223, that is, a structure of a marble in the prior art is adopted, that is, an elastic sheet is provided in the vertical tube 221, the elastic sheet forms the protruding column, a hole corresponding to the protruding column is provided on the vertical tube 221, under a normal condition, the protruding column extends out of the vertical tube under the action of the elastic sheet, and when the protruding column is pressed, the elastic sheet contracts to retract the protruding column.

As shown in fig. 9, the upper surface of the fixing base 23 is provided with a slot 231 into which the vertical pipe 221 of the table top fixing pipe 22 is inserted, the peripheral side of the fixing base 23 is further provided with a plurality of bayonets 232 penetrating through the slot 231 and a yielding slot hole 233 communicating with the upper end positions of the bayonets 232, that is, the depth of the bayonets 232 in the vertical direction is greater than the yielding slot hole 233. The vertical tube 221 of the table top fixing tube 22 is inserted into the slot 231, and is fixed by the cooperation of the elastic convex column 223 and the bayonet 232, and the rotation of the table top fixing tube 22 is realized by the abdication of the elastic convex column 223 through the abdication slotted hole 233. The slot 231 is a slot body with a non-through bottom, and after the vertical tube is inserted, the slot bottom of the slot 231 plays a supporting role, so that the bearing capacity is strong. Meanwhile, in the inserting process, the elastic convex column 223 is pressed against the inner wall of the slot 231 and retracts, after the inserting is completed, the elastic convex column 223 corresponds to the position of the bayonet 232 and then extends out again, and the elastic convex column and the bayonet 232 are clamped and fixed. When the desktop fixing tube 22 needs to be rotated, the desktop fixing tube 22 is lifted up first, so that the elastic convex column 223 moves up to be flush with the abdicating slotted hole 233, in the rotating process of the desktop fixing tube 22, the elastic convex column 223 moves in the abdicating slotted hole 233, namely, the abdicating slotted hole 233 abdicating the movement of the elastic convex column 223, when the elastic convex column 223 corresponds to the next bayonet 232, the desktop fixing tube 22 moves down to enable the elastic convex column 223 to be clamped into the corresponding bayonet 232 under the action of the self gravity of the components such as the desktop fixing tube 22, the desktop plate 21 and the like, and the secondary clamping and fixing are realized. More specifically, in the present embodiment, the number of the bayonets 232 is two, which respectively correspond to the positions of the table top 21 at the front and the sides of the seat, that is, when the table top 21 is at the positions at the front and the sides of the seat, the elastic studs 223 are respectively fixed to the two bayonets 232, so as to fix the position of the table top 21.

Of course, in other embodiments, the structure of the fixing seat 23 and the structure of the vertical tube are not limited thereto.

In still another embodiment, a mounting groove 234 is formed on the peripheral side of the fixing seat 23, and the seat frame 10 is fixedly connected to the mounting groove 234. More specifically, the assembling groove 234 is formed by two opposite protruding walls protruding outward from the peripheral side of the fixing base, and the two protruding walls are provided with a plurality of sets of first connecting holes 235 corresponding to each other two by two, in this embodiment, an upper set of first connecting holes 235 and a lower set of first connecting holes 235 are provided, the chair frame 10 is provided with a second connecting hole (not shown) corresponding to the first connecting hole 235, and the fixing member further includes a fixing member (not shown), such as a pin, and the fixing member is inserted into the corresponding first connecting hole 235 and the second connecting hole, so as to realize the fixed assembling of the fixing base 23.

Of course, in other embodiments, the fixing assembly manner of the fixing seat 23 and the seat frame 10 is not limited to this. Clamping, inserting or welding modes can also be adopted.

Further preferably, in this embodiment, a sleeve hole 2411 and a pin 243 are formed on the locking mechanism 24, the pin 243 is configured to be switchable between extending into the sleeve hole 2411 and retracting to be separated from the sleeve hole 2411, the vertical tube 221 is movably sleeved in the sleeve hole 2411, a pin hole (not shown) is further formed on the vertical tube 221, when the pin 243 retracts to be separated from the sleeve hole 2411, the locking mechanism 24 and the vertical tube 221 can slide relatively, and when the pin 243 corresponds to the pin hole on the vertical tube 221 and extends into the pin hole, the locking mechanism 24 and the vertical tube 221 are fixed. The locking mechanism 24 is fixed on the vertical pipe 221 by inserting and matching the pin 243 and the pin hole, and the locking mechanism is simple in structure and firm in connection. More specifically, one pin hole is formed in the vertical tube 221, i.e., only one fixed table top is provided, as shown in fig. 1. Certainly, in other embodiments, the vertical tube 221 may also have a plurality of pin holes along the length direction thereof, and the pin 243 is respectively matched with the plurality of pin holes to fix the table top plate 21 at different turning angles, for example, three pin holes are provided, and when the pin 243 is matched with the uppermost pin hole, the table top plate 21 is in a state of being tilted upward by a certain angle; when the pin 243 is engaged with the middle pin hole, the table top 21 is in a horizontal state; when the pin 243 is engaged with the lowest pin hole, the table top 21 may be turned downward, etc.

Still further preferably, in this embodiment, the locking device 24 specifically includes: the sleeve main body 241 is provided with the sleeve hole 2411, the inner slide block 242, the elastic element 244 and the pin 243, the sleeve main body 241 is further provided with an inner cavity (not shown) which is perpendicular to the sleeve hole and is provided with an opening 2412, the inner slide block 242 can be matched in the inner cavity in a sliding mode, the inner slide block 242 is provided with a long groove through hole 2421 corresponding to the sleeve hole 2411, the vertical pipe 221 is arranged in the sleeve hole 2411 and the long groove through hole 2421 in a penetrating mode, and the long groove through hole 2421 is large in length size, so that the telescopic movement of the inner slide block 242 can be achieved. The pin 243 is fixed on the inner slide block 242 and protrudes into the long slot through hole 2421, the elastic member 244 is disposed in the inner cavity, when the sleeve main body 241 slides to the pin 243 on the inner slide block 242 corresponding to the pin hole of the vertical tube 221, the elastic member 244 drives the inner slide block 242 to slide outwards, so that the pin 243 is inserted into the pin hole of the vertical tube 221; pressing the inner slide 242 retracts the pin 243 out of the pin hole of the standpipe 221. In operation, when the table top plate 21 needs to be unfolded, the table top plate 21 is pulled to turn over the table top plate 21 to a corresponding position, the pin 243 corresponds to the pin hole, and the pin 243 automatically pops into the pin hole under the action of the elastic member 244 to realize fixation. When the table top 21 needs to be folded, one hand presses the inner sliding block 242, so that the inner sliding block 242 overcomes the elastic force of the elastic member 244 to drive the pin 243 to retract inward, the pin 243 is separated from the pin hole, the locking mechanism 24 is unlocked, and the other hand operates the table top 21 to fold. Has the characteristics of simple structure, simple and convenient operation and easy realization.

More specifically, in this embodiment, the elastic member 244 is a spring, the inner sliding block 242 is further provided with an annular groove 2424 sleeved with the spring, one end of the spring is sleeved into the annular groove 2424 of the inner sliding block 242 to be fixed, and the connection structure is good. Of course, in other embodiments, elastic devices such as elastic pieces may be used instead.

More specifically, in the present embodiment, the inner slide block 242 is provided with a plug hole 2422 for inserting the pin 243 and a pin hole 2423 communicating with the plug hole 2422, and the pin 243 is also provided with a pin hole 2431. After the pin 243 is inserted into the inner slide block 242, the pin hole 2423 of the inner slide block 242 corresponds to the pin hole 2431 of the pin 243, and is connected through a pin 245, so as to fix the pin 243. The connecting structure is simple and easy to detach and replace.

More specifically, in this embodiment, a connection wing plate 246 is further protruded outwardly from the outer circumferential side of the sleeve main body 241, and the connection member 25 is hinged to the connection wing plate 246. Specifically, shaft holes (the shaft hole 2461 of the connecting wing plate 246 and the shaft hole of the connecting piece 25 are not shown) are formed in the connecting wing plate 246 and the connecting piece 25, and the connecting wing plate and the connecting piece are connected in a penetrating mode through a rotating shaft (not shown), so that hinged assembly is achieved. More specifically, the connecting member 25 is hinged to the table top 21 in the following manner: the table top 21 is provided with an axle hole 212, and the connecting member 25 is provided with an axle post (not shown) which is rotatably inserted into the axle hole 212 of the table top 21, thereby realizing the hinge assembly.

Of course, in other embodiments, the structure of the locking device is not limited to this, and other structures may be adopted to implement the locking device.

Further preferably, in this embodiment, the chair frame 10 is a foldable chair frame, and can be folded and stored integrally.

Specifically, in this embodiment, the chair frame 10 includes two side frames 11 and two U-shaped seat tubes 12, the two side frames 11 are disposed oppositely, the middle positions of the two U-shaped seat tubes 12 are hinged to form an "X" -shaped folding frame, the "X" -shaped folding frame is disposed between the two side frames 11, the end portions of the "X" -shaped folding frame are hinged to the two side frames 11 respectively, specifically, the lower end portion of the "X" -shaped folding frame is hinged to the side frame 11 directly, the upper end portion of the "X" -shaped folding frame is hinged to a first end of an intermediate member 13, and the second end of the intermediate member 13 is hinged to the side frame 11, so as to achieve a foldable structure of the chair frame 10. The folded chair frame 10 is shown in figure 5. The table top device is arranged on one of the side frames 11.

Of course, in other embodiments, the structure of the seat frame 10 is not limited thereto. Other foldable structures can be adopted, or fixed structures which are not foldable can be directly adopted, and the like.

Specifically, in this embodiment, the connecting member 25 and the intermediate member 13 are both made of iron sheets with the same structure, and the structure is firm. Of course, in other embodiments, the components may have different structures and different materials.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a director's chair of desktop board is rotated in area, includes the chair frame and sets up the desktop board device on the chair frame, its characterized in that: the desktop plate device comprises a desktop plate, a desktop fixing pipe, a fixing seat, a locking mechanism and a connecting piece, wherein the fixing seat is fixedly arranged on a chair frame, the desktop fixing pipe is provided with a vertical pipe and a horizontal pipe which are vertically arranged, the vertical pipe is rotatably and fixedly inserted into the fixing seat, the horizontal pipe is arranged in the desktop plate in a penetrating mode, the desktop plate is overturned by taking the horizontal pipe as a rotating shaft, the locking mechanism is fixedly arranged on the vertical pipe in a sliding mode, and two ends of the connecting piece are respectively hinged to the locking mechanism and the desktop plate.

2. The director's chair with a pivotable table top as in claim 1, wherein: be equipped with the elasticity projection of scalable activity on the standpipe of the fixed pipe of desktop, the upper surface of fixing base is seted up and is supplied the standpipe of the fixed pipe of desktop to insert the slot of establishing, the week side of fixing base still sets up the slotted hole of stepping down that link up to a plurality of bayonets of slot and the upper end position of a plurality of bayonets of intercommunication, the standpipe of the fixed pipe of desktop is inserted and is located in the slot to realize fixedly through the cooperation of elasticity projection and bayonet socket, and realize the rotation of the fixed pipe of desktop through stepping down of arc breach to the elasticity projection.

3. A director's chair with a rotatable table top as claimed in claim 1 or 2, wherein: an assembly groove is formed on the peripheral side surface of the fixed seat, and the chair frame is fixedly connected through the assembly groove.

4. The director's chair with a pivotable table top as in claim 3, wherein: the assembly groove is composed of two opposite convex walls protruding outwards from the peripheral side surface of the fixing seat, a plurality of groups of first connecting holes corresponding to each other are formed in the two convex walls, a second connecting hole corresponding to the first connecting hole is formed in the chair frame, and the assembly groove further comprises a fixing piece, and the fixing piece is connected in the corresponding first connecting hole and the second connecting hole in a penetrating mode.

5. The director's chair with a pivotable table top as in claim 1, wherein: the locking mechanism is provided with a sleeve hole and a pin column, the pin column is arranged to extend into the sleeve hole and retract to be switched between the sleeve hole and the sleeve hole, the vertical pipe is movably sleeved in the sleeve hole, the vertical pipe is further provided with a pin hole, when the pin column retracts to the position of the sleeve hole, the locking mechanism and the vertical pipe can slide relatively, and when the pin column corresponds to the pin hole in the vertical pipe and extends into the pin hole, the locking mechanism and the vertical pipe are fixed.

6. The director's chair with a pivotable table top as in claim 5, wherein: one or more pin holes are formed in the vertical pipe along the length direction of the vertical pipe.

7. The director's chair with a pivotable table top as in claim 5, wherein: the latching mechanism specifically includes: the sleeve comprises a sleeve main body with the trepanning, an inner sliding block, an elastic piece and a pin column, wherein the sleeve main body is also provided with an inner cavity which is vertical to the trepanning and is provided with an opening, the inner sliding block can be matched in the inner cavity in a sliding manner, the inner sliding block is provided with a long groove through hole corresponding to the trepanning, the pin column is fixed on the inner sliding block and protrudes towards the long groove through hole, the elastic piece is arranged in the inner cavity, and when the sleeve main body slides to enable the pin column on the inner sliding block to correspond to a pin hole of the vertical pipe, the elastic piece drives the inner sliding block to slide, so that the pin column is inserted into; and pressing the inner slide block to enable the pin column to retract to be separated from the pin hole of the vertical pipe.

8. The director's chair with a pivotable table top as in claim 7, wherein: and the outer peripheral side of the sleeve main body is also provided with a connecting wing plate which protrudes outwards, and the connecting piece is hinged on the connecting wing plate.

9. The director's chair with a pivotable table top as in claim 1, wherein: the chair frame is a foldable chair frame.

10. The director's chair with a pivotable table top as in claim 9, wherein: the chair frame comprises two side frames and two U-shaped seat pipes, the two side frames are arranged oppositely, the middle positions of the two U-shaped seat pipes are hinged to form an X-shaped folding frame, the X-shaped folding frame is arranged between the two side frames, the lower end part of the X-shaped folding frame is directly hinged to the side frames, the upper end part of the X-shaped folding frame is hinged to a first end of an intermediate piece, the second end of the intermediate piece is hinged to the side frames, and the desktop plate device is arranged on one of the side frames.