CN111887580A

CN111887580A - Panel turnover type table and sliding unlocking type panel turnover device

Info

Publication number: CN111887580A
Application number: CN202010659453.0A
Authority: CN
Inventors: 张宇涛; 陈华杰; 陈哲; 黄洪强; 杨润强
Original assignee: Zhejiang Hutong Ergonomics Technology Co Ltd
Current assignee: Zhejiang Hutong Ergonomics Technology Co Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2020-11-06
Anticipated expiration: 2040-07-09
Also published as: CN111887580B

Abstract

The invention relates to a panel turnover table and a sliding unlocking type panel turnover device, and belongs to the technical field of furniture. The turning plate device comprises a turning plate and a folding bracket, wherein the folding bracket comprises an installation support, a swinging support and a locking mechanism; the swing support can move between an unlocking position and a locking position along the axial direction of the hinge shaft; a return spring is arranged on the mounting support, and the elastic restoring force of the return spring forces the swinging support to move to a locking position along the axial direction; the locking mechanism comprises a locking pin which is arranged on the swinging support and is arranged in parallel with the hinge shaft side by side, and a pin hole which is arranged on the mounting support; when the swing support swings to the unfolding use position, the locking pin is located at the position aligned with the pin hole, and when the swing support is located at the locking position, the locking pin is provided with a rod section part inserted into the pin hole, and can be driven by the swing support to be completely pulled out of the pin hole. The plate turnover device can realize the operation of folding/unfolding by one hand, simplifies the structure of the unlocking mechanism and can be widely applied to the field of home furnishing.

Description

Panel turnover type table and sliding unlocking type panel turnover device

Technical Field

The invention relates to the technical field of furniture, in particular to a flap-type table and a sliding unlocking flap device for constructing the table.

Background

As an essential device for a desk in a place such as a study or a work, a desk generally includes a desk top and a support for supporting the desk top at a certain height, such as a structure of a study desk disclosed in patent documents CN206213544U and CN205267398U, wherein the desk top is horizontally arranged based on the support of the support, and the desk top has a small number of people to be adapted due to the fixed height, and the support structure is improved to adjust the height of the desk top in order to increase the adaptable range of the desk top in height, such as a structure of a study desk disclosed in patent document CN 208891834U. In addition to the high frequency of use of a small number of tables, such as office tables, which are typically used for a small number of fixed periods of time, such as study tables, these tables typically occupy a large amount of floor space at home, i.e., less occupied floor space.

In order to solve the above technical problems, a common technical means is to directly fix the support of the desk such as the learning desk on the wall; the table top board is fixed on the wall in a turnover mode through the foldable support, the foldable support and the table top board form a turnover device, the table top board is supported at a use position through the foldable support in an unfolding state when the table top board is used, the support is locked at the unfolding use position through the locking mechanism arranged on the foldable support, and the table top board is turned to a folding position close to the wall through the foldable support in a folding state when the table top board is idle, so that part of space is released for other activities. In addition, the table top plate can be divided into a main plate and an auxiliary plate which is hinged on the side part of the main plate in a foldable and retractable manner by utilizing the folding bracket, so that the size of the whole actual table top can be adjusted according to the requirement, namely the whole floor area of the table is variable, and the originally small living area can be fully utilized.

However, in the folding and/or unfolding process of the existing flap device, two hands are needed to operate, namely, one hand opens the unlocking mechanism, and the other hand forces the table top board to fold or unfold; some tables can be operated by one hand, and usually the unlocking mechanism is arranged at the edge of the table top plate by using a traction rope, so that the overall structure is complex, and the problems of interference and the like easily exist. In addition, along with the increase of the length of the turning plate, a plurality of folding supports are required to work synchronously, namely, a plurality of locking mechanisms arranged side by side are required to be unlocked synchronously, at the moment, the pulling wires are difficult to be used for synchronous driving, and a hard rod approximately equal to the turning plate in length is usually adopted for synchronous driving, so that the integral structure is complex, and the interference with the turning action of the turning plate is easy to occur.

Disclosure of Invention

The invention mainly aims to provide a sliding unlocking type plate turnover device, which can simplify the structure of an unlocking mechanism and improve the compactness of the whole structure while realizing the operation of unfolding and/or folding by a single hand;

still another object of the present invention is to provide a table constructed by the above-mentioned slide unlocking type flap device.

In order to achieve the main object, the invention provides a sliding unlocking type flap device, which comprises a flap and a folding bracket, wherein the folding bracket comprises a mounting support, a swinging support which can be hinged to the mounting support in a swinging manner between an unfolding use position and a folding storage position, and a locking mechanism which is used for unlocking the swinging support at the unfolding use position; the turning plate is fixedly arranged on the swinging support; the swing support can move back and forth between an unlocking position and a locking position along the axial direction of the hinge shaft; a return spring is arranged on the mounting support, and the elastic restoring force of the return spring forces the swinging support to move to a locking position along the axial direction; the locking mechanism comprises a locking pin which is arranged on the swinging support and is arranged in parallel with the hinge shaft side by side, and a pin hole which is arranged on the mounting support; when the swing support swings to the unfolding use position, the locking pin is located at the position aligned with the pin hole, and when the swing support is located at the locking position, the locking pin is provided with a rod section part inserted into the pin hole, and can be driven by the swing support to be completely pulled out of the pin hole when the swing support moves to the unlocking position.

Based on the scheme, when the flap device is in the unfolding use state, the flap device and the hinge shaft are arranged side by side to form a stable supporting structure based on the matching of the hinge shaft and the matching of the locking pin and the pin hole, so that the flap is stably supported at the unfolding use position, and the pressure which can be borne by the locking pin/the hinge shaft can be provided; if the turnover plate in the unfolding use state needs to be folded and folded to reduce the occupied area, only one hand is needed to grasp the turnover plate and drive the turnover plate to overcome the resistance formed by the elastic restoring force and move from the locking position to the unlocking position along the axial direction of the hinge shaft, so that the locking pin inserted in the pin hole is driven to withdraw from the pin hole, the turnover plate completely withdraws from the pin hole when reaching the unlocking position to complete the unlocking operation, then the turnover plate is turned to the folding and folding position along the unfolding use position around the hinge shaft, and if two hands exert force together, the turnover plate is simpler; after the folding is finished, the hinge shaft is moved to the axial reset unlocking position along the hinge shaft under the action of the elastic restoring force of the reset spring or has the trend of resetting to the unlocking position; if the turning plate in the folding and folding state needs to be unfolded for use, the turning plate needs to be grasped by hands to directly drive the turning plate to turn over from the folding and folding position to the unfolding and using position around the hinge shaft, or the turning plate is driven to move from the locking position to the unlocking position by more than a preset distance and then driven to turn over around the hinge shaft, and when the turning plate reaches the unfolding and using position, the locking pin is driven to move axially along the hinge shaft relative to the hinge shaft under the action of external elastic restoring force to be inserted into the pin hole so as to achieve the purpose of locking. In the technical scheme, the unlocking and overturning actions of the turnover plate can be completed based on one-hand operation, and compared with the prior art, the unlocking mechanism can be effectively simplified; thereby making the whole structure more compact and simplified. In addition, for a plurality of locking mechanisms arranged side by side, synchronous unlocking can be carried out based on the connection of the turning plates, so that the whole structure is more compact.

The mounting support comprises a mounting bottom plate, and a locking limiting hinge lug seat and an unlocking limiting hinge lug seat which extend outwards from the outer plate surface of the mounting bottom plate and are oppositely arranged; hinge shaft holes matched with the end parts of the hinge shafts are formed in the locking limiting hinge lug seat and the unlocking limiting hinge lug seat respectively, the reset spring is a compression spring sleeved on the hinge shafts, one end of the compression spring is pressed against the side surface of the swinging support, and the other end of the compression spring is pressed against the inner side surface of the locking limiting hinge lug seat; the locking pin comprises a screw and an upper sleeve screwed at the tail end part of the screw, and the swing support is provided with an installation screw hole screwed with the screw and used for fixing the screw; the pin holes are distributed on the unlocking limit hinge lug seats; the inner side surface of the unlocking limit hinge lug seat is of a flat plate surface structure; the plate surface structure is at least provided with an arc groove section at the middle rear section of the swinging track projection, the arc groove section is gradually shallow along the direction close to the pin hole, the groove end part of the arc groove section is smoothly abutted with the inner side surface of the locking hinge lug seat, the end part of the arc groove section far away from the pin hole can accommodate the rod section part, the depth of the arc groove section is more than or equal to the length of the rod section part, and the swinging track projection is the projection of the track of the locking pin between the swinging position and the folding position from the unfolding use position to the folding position on the plate surface structure. During the use, based on the setting of the arc-shaped groove section with the gradually deepened groove depth, the groove end of the groove can be smoothly slid into in the swinging process, so that the compression amount of the return spring is reduced, and the use fatigue is reduced.

The mounting support comprises a mounting bottom plate, and a locking limiting hinge lug seat and an unlocking limiting hinge lug seat which extend outwards from the outer plate surface of the mounting bottom plate and are oppositely arranged; hinge shaft holes matched with the end parts of the hinge shafts are formed in the locking limiting hinge lug seat and the unlocking limiting hinge lug seat respectively, the reset spring is a compression spring sleeved on the hinge shafts, one end of the compression spring is pressed against the side surface of the swinging support, and the other end of the compression spring is pressed against the inner side surface of the locking limiting hinge lug seat; the swing support is provided with a guide hole; the locking pin comprises a rod part which can be sleeved in the guide hole in a reciprocating way along the axial direction of the locking pin and an expansion joint which is fixedly arranged at the central area of the rod part and has the outer diameter larger than the aperture of the guide hole; the rod part is sleeved with an offset return spring which is a compression spring, one end of the offset return spring is abutted against the expansion joint, and the other end of the offset return spring is abutted against the inner side surface of the locking limit hinge lug seat; one end part of the rod section part sleeved with the compression spring, which is far away from the expansion joint, is sleeved with an arc-shaped sliding hole arranged on the unlocking limit hinge lug seat, and the end part of the pin slides along the arc-shaped sliding hole in the process of swinging around the hinge shaft along with the pin; the pin holes are distributed on the unlocking limit hinge lug seats; the inner side surface of the unlocking limit hinge lug seat is of a flat plate surface structure; the flat plate surface structure is at least provided with an arc groove section at the middle rear section of the swinging track projection, the depth of the arc groove section is gradually shallow along the direction close to the pin hole, the arc groove section is smoothly adjacent to the flat plate surface structure at the end part of the groove, the end part of the groove far away from the pin hole can accommodate the rod section part, the depth of the rod section part is more than or equal to the length of the rod section part, and the swinging track projection is the projection of the track of the locking pin, which swings around the hinge shaft from the unfolding use position to the folding and folding position, on. During the use process, based on the arrangement of the arc-shaped groove section with the gradually deepened groove depth, the groove can smoothly slide into the groove tail end of the groove in the swinging process, so that the compression amount of a compression spring is reduced, and the use fatigue is reduced; and based on the elastic sliding arrangement of the locking pin, the compression amount of the return spring can be effectively reduced.

The specific scheme is that the return spring is a compression spring sleeved outside the hinge shaft, one end of the compression spring is pressed against the side face of the swing support, and the other end of the compression spring is pressed against the mounting support. To further simplify the overall structure and improve the compactness of the overall structure.

The preferred scheme is that the locking pin is fixedly connected with the swinging support. The technical scheme can effectively simplify the connection relation between the locking pin and the swing support.

The preferred scheme is that the swing support is provided with a guide hole, and the locking pin can be sleeved in the guide hole in a reciprocating manner along the axial direction of the locking pin and can move towards the direction far away from the pin hole along the axial direction of the guide hole by an offset distance; the offset distance is larger than or equal to the distance between the locking position and the unlocking position, an offset return spring is sleeved on the locking pin, and the elastic restoring force of the offset return spring forces the locking pin to move towards the direction close to the pin hole. In the technical scheme, the locking pin has a certain elastic retraction distance relative to the swing support, and the distance is preferably the distance inserted into the pin hole in the locking state, so that the turning plate can be reset to the locking position as much as possible to reduce the protruding arrangement of the boundary of the turning plate when the turning plate is folded and folded.

The further proposal is that the locking pin can be movably arranged on the swinging support along the guide hole; an expansion joint with the outer diameter larger than that of the guide hole is arranged on the rod part of the locking pin and is positioned on one side of the swing support, which is far away from the pin hole; one end of the offset return spring is pressed against the end face of the expansion joint, which is far away from the pin hole, and the other end of the offset return spring is pressed against the mounting support. The technical scheme can effectively simplify the structure of the device for driving the locking pin to elastically retract.

The preferred scheme is that a wall part is arranged on the mounting support, and the port of the pin hole is arranged on the wall surface of the wall part; along the axial direction of the pin hole, a convex plane track with the height higher than the port is convexly arranged on the wall surface at the projection position of the swing track, or the wall surface is a plane track which is level with the port at the projection position of the swing track, or the wall surface is a plane track which is level with the port at the front end part of the projection position of the swing track, the main body part of the projection position of the swing track is a convex plane track which is higher than the port, and the tail end part of the projection position of the swing track is a locking groove for inserting a locking pin, or the tail end of the wall surface projected on the swing track is a locking groove for inserting the locking pin and the rest is a plane track which is level with the port, or the rear section of the wall surface projected on the swing track is a locking arc-shaped groove for inserting the locking pin and the front section is a plane track which is level with the port, or the wall surface is at least provided with an arc groove section at the middle rear section of the swing track projection, or the wall surface is provided with a plurality of pin holes matched with the locking pins at intervals on the swing track projection; the swinging track projection is the projection of the track between the locking pin swinging from the unfolding use position to the folding storage position around the hinge shaft on the wall surface. The locking pin is effectively guided in the swinging process, and for the scheme that the locking groove or the locking arc-shaped groove is arranged at the tail end, the turnover plate can be reset to the locking position as much as possible during folding and folding, so that the protruding arrangement of the boundary of the turnover plate is reduced.

The further proposal is that the arc groove section arranged on the projection of the swing track has gradually shallow groove depth along the direction close to the pin hole to form an obliquely arranged leading-in and leading-out surface, the groove end is smoothly adjacent to the wall surface, the end part of the groove far away from the pin hole can contain the rod section part, and the groove depth is more than or equal to the length of the rod section part; the main body portion of the wall surface is a plane that is normal to the axial direction of the pin hole and is flush with the port in the axial direction of the pin hole.

The mounting support comprises a mounting bottom plate, and a locking limit hinge lug seat and an unlocking limit hinge lug seat which extend outwards from the outer plate surface of the mounting bottom plate and are oppositely arranged; the locking limiting hinge lug seat and the unlocking limiting hinge lug seat are both provided with hinge shaft holes matched with the end parts of the hinge shafts; the inner side surface of the unlocking limit hinge lug seat forms a wall surface. The technical scheme effectively simplifies the structure of the mounting support.

In order to achieve the other purpose, the flap type table provided by the invention comprises a vertical fixing plate and a flap device fixed on the vertical fixing plate through a fastener, wherein the flap device is a sliding unlocking flap device described in any technical scheme; the turning plate forms a table top board which is horizontally arranged when the table top board is unfolded at the use position.

Drawings

Fig. 1 is a perspective view of a flap device in embodiment 1 of the present invention;

FIG. 2 is a perspective view of a folding stand according to example 1 of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 1;

fig. 4 is a perspective view of a fixing mount in embodiment 1 of the present invention;

FIG. 5 is a partial structural view of the front side of a folding bracket in example 1 of the present invention;

fig. 6 is a structural view of a swing mount in embodiment 1 of the present invention;

fig. 7 is an exploded view of a hinge shaft, a return spring and a locking pin according to embodiment 1 of the present invention;

fig. 8 is a schematic view of the swing bracket pushed to move from the locked position to the unlocked position in the unlocking process in embodiment 1 of the present invention;

fig. 9 is a schematic view showing the swing bracket being turned around the hinge shaft from the deployed use position to the folded stowed position in the process of folding and stowing in embodiment 1 of the present invention;

fig. 10 is a schematic view illustrating that the swing bracket approaches to the locking position after being folded by the elastic restoring force of the return spring in embodiment 1 of the present invention;

FIG. 11 is a perspective view of a folding stand according to example 2 of the present invention;

FIG. 12 is an exploded view showing the folding bracket according to embodiment 2 of the present invention;

FIG. 13 is a partial structural view of the front side of a folding bracket in embodiment 2 of the invention;

fig. 14 is a schematic view of the swing bracket pushed to move from the locking position to the unlocking position in the unlocking process in embodiment 2 of the present invention;

fig. 15 is a schematic view showing the swing bracket being turned around the hinge shaft from the deployed use position to the folded stowed position in the process of folding and stowing in embodiment 2 of the present invention;

fig. 16 is a schematic view illustrating that the swing seat approaches to the locking position after being folded by the elastic restoring force of the return spring in the folding and retracting process in embodiment 2 of the present invention;

fig. 17 is a schematic view illustrating that the swing seat approaches to the locking position after being folded by the elastic restoring force of the return spring in the folding and retracting process in embodiment 3 of the present invention.

Detailed Description

The invention is further illustrated by the following examples and figures.

Example 1

Referring to fig. 1, the flap type table 1 of the present invention includes a vertical fixing plate 10 and a slide unlocking type flap device 2 fixed on the vertical fixing plate 10 by a fastening screw 11. The sliding unlocking type flap device 2 comprises a flap 20 and a mounting bracket 21 used for mounting the flap 20 on the vertical fixing plate 10 in a turnover manner, the mounting bracket 21 comprises more than two folding brackets 3 which are arranged side by side, and the specific number of the folding brackets 3 is two. The vertical fixing plate 10 may be fixed to a wall or the like by fasteners such as expansion screws engaged with the hole structures 100 formed thereon, so that the turning plate 20 is substantially in a horizontal position when the folding brackets 3 are unfolded, thereby forming a horizontal table top of the turning plate type table 1, or the structure of the folding brackets 3 may be modified appropriately to form an inclined table top; the vertical fixing plate 10 constitutes the target object in this embodiment, and is used for installing the sliding unlocking type panel turnover device 2, and it may also be a main structure of a wall or a table, for example, a sub-table top board of a table with a main table top board may be constructed by using a panel turnover, and the sub-table top board is located beside the main table top board, so as to be able to be unfolded and to be spliced with the main table top board to enlarge the usable area of the table top, and also when only the main table top board is needed, the sub-table top board may be folded and folded to reduce the occupation of space.

Referring to fig. 2 to 10, the folding bracket 3 includes a mounting bracket 4, a swing bracket 5 whose fixed end is hinged to the mounting bracket 4 by a hinge shaft 30, and a locking mechanism for locking the swing bracket 5 at a target position in a swing state about the hinge shaft 30.

The mounting bracket 4 includes a mounting base plate 40, and a hinge eyelet hole seat 41 and a hinge eyelet hole seat 42 which extend from an outer plate surface of the mounting base plate 40 to be bent outward by 90 degrees and are oppositely arranged, a hinge shaft hole 410 through which one end of the hinge shaft 30 passes is provided on the hinge eyelet hole seat 41, and a hinge shaft hole 420 through which the other end of the hinge shaft 30 passes is provided on the hinge eyelet hole seat 42, thereby fixedly mounting the hinge shaft 30 on the mounting bracket 4. A plurality of mounting through holes 400 are formed in the mounting base plate 40 for fastening screws to pass therethrough so as to fix the mounting bracket 4 to a target object such as the vertical fixing plate 10. In the present embodiment, the length directions of the

hinge ear bases

41 and 42 extend to be substantially equal to the length direction of the mounting base plate 40, and are substantially trapezoidal, so as to form a reinforcing rib plate to improve the structural strength of the whole mounting seat 4. The mounting support 4 can be formed by directly bending a whole steel plate body, and can also be formed by welding steel plate blocks cut by scattered blocks. The hinge ear hole seats 42 are provided with hinge shaft holes 420 arranged side by side and pin holes 421 with a distribution distance L between central axes thereof, and the inner side surfaces of the hinge ear seats 42 are convexly formed with arc-shaped strip-shaped plane rails 423, the arc-shaped central axes of the arc-shaped strip-shaped plane rails 423 are centered around the central axes of the hinge shaft holes 420, the radius is equal to the distribution distance L, and the width of the rails is equal to the diameter of the holes of the pin holes 421.

The swing bracket 5 includes an outer link plate 50, and a hinge eye seat 51 and a hinge eye seat 52 which extend from a lower plate of the outer link plate 40 to face downward by 90 degrees and are oppositely arranged, a hinge shaft hole 510 through which one end of the hinge shaft 30 passes is provided on the hinge eye seat 51, and a hinge shaft hole 520 through which the other end of the hinge shaft 30 passes is provided on the hinge eye seat 52, thereby hinging the hinge end of the swing bracket 5 to the mounting bracket 4. The hinge eye seat 51 is provided with a mounting screw hole 511 spaced apart from the hinge hole 510 by the aforementioned arrangement distance L, and the hinge eye seat 52 is provided with a mounting screw hole 521 spaced apart from the hinge hole 520 by the aforementioned arrangement distance L. In the present embodiment, a plurality of mounting through holes 500 are provided on the outer connecting plate 50, and are connected with the turning plate 20 based on screws passing through them, thereby fixedly connecting the turning plate 20 to the swing support; the length directions of the hinge lug seat 51 and the hinge lug seat 52 extend to be approximately equal to the length direction of the outer connecting plate 50, so that a reinforcing rib plate is formed, the structural strength of the whole swing support 5 is improved, and the larger load bearing capacity is improved for the turning plate 20.

In the present embodiment, the hinge ear seat 40, the hinge ear seat 41, the hinge ear seat 50 and the hinge ear seat 51 are all flat plate structures, i.e. their side plate surfaces are all planar structures.

The process of mounting the oscillating support 5 on the mounting support 4 comprises the following steps:

(1) the screw 61 is screwed in from the end side of the screw hole 511 and passes through the screw hole 521 in a screwing manner, and the tail end of the screw rod extends out; a sleeve 62 with an internal thread and a spherical end is screwed onto the end of the screw 61, so as to form a tight press against the end side of the hinge lug 52, thus forming a lock nut structure. In this embodiment, the sleeve 62 is slightly smaller than the diameter of the pin hole 421, and the two form a clearance fit; in the present embodiment, the screw 61 and the sleeve 62 are combined to form the locking pin in the present embodiment, that is, the locking pin is fixed on the swing seat 5, and in addition, an integral locking pin may be adopted, and by using a structure that one end portion thereof is the same as the sleeve 62, and the other end portion thereof is a screw end portion adapted to a threaded hole provided on the swing seat 5, a nut screwed outside the screw end portion may be arranged to abut on an outer end surface of the hinge lug 51 in mounting.

(2) The plastic sleeve 31 is sleeved outside the hinge shaft 30 which is made of steel and has one end as an expansion end, the plastic sleeve and the plastic sleeve penetrate through the end side of the hinge lug seat 42, sequentially pass through the hinge shaft hole 420, the T-shaped plastic limit sleeve 63, the hinge shaft hole 520, the plastic lantern ring 64, the T-shaped plastic limit sleeve 65, the hinge shaft hole 521, the compression spring 66 and the hinge shaft hole 421, and are pressed to expand the end at the other end forming part of the hinge shaft 30 so as to fixedly connect the swing support 5 to the mounting support 4. In the step, based on the matching of the T-shaped plastic limit sleeve 63 and the plastic collar 64 with the T-shaped plastic limit sleeve 65, and the two T-shaped plastic limit sleeves are under the limit support of the plastic collar 64, part of sleeves extend out of the hinge hole, so that the outer end part of the T-shaped plastic limit sleeve 65 is pressed against the end part of the compression spring 66, and the outer end part of the T-shaped plastic limit sleeve 63 is pressed against the inner side surface of the hinge lug seat 42, thereby reducing the friction in the swinging process; and part of the sleeve pipe can extend out of the hinge shaft hole based on the interference fit of the T-shaped plastic limit sleeve and the hinge shaft hole. And the compression spring 55 is pressed between the hinge lug 51 and the hinge lug 41, i.e. one end of the compression spring 66 is pressed against the side surface of the swing support 5, and the other end is pressed against the inner side surface of the hinge lug 41, and the elastic restoring force thereof forces the swing support 5 to move towards the direction close to the hinge lug 42.

After the installation is completed, the pin hole 421 is located on the projection of the swing track formed by the sleeve 62 around the hinge shaft 30 on the inner side surface of the hinge ear seat 42, that is, on the projection of the swing track of the locking pin, and furthermore, the arc center line of the arc strip-shaped plane track 423 coincides with the center line of the projection of the swing track; during the swinging process, if the swinging support 5 is pushed away from the hinge ear seat 42 by no external force arranged along the transverse direction and the locking pin swings to a position aligned with the pin hole 421, that is, when the projection of the sleeve 62 on the inner side surface of the hinge ear seat 42 is completely covered by the pin hole 421, under the elastic restoring force of the compression spring 66, the swinging support 5 is driven to approach the hinge ear seat 42, so that the sleeve 62 moves along with the swinging support and is inserted into the pin hole 421, the swinging support 5 is prevented from swinging around the hinge shaft 30 continuously to lock the swinging support 5 at the position, that is, the swinging motion of the swinging support 5 around the hinge shaft is locked at the unfolding use position in the embodiment, that is, the locking pin and the pin hole 421 form the locking mechanism in the embodiment; and the rocking support 5 is located at the position nearest to the hinge lug 42 by the elastic restoring force of the compression spring 66, that is, the position of the rocking support 5 in the axial direction of the hinge shaft 30 is the locking position. At this point, the flap 20 is in the extended use position, supported by the swing support 5, and the table top is arranged horizontally for the flap-type table in this embodiment.

If it is desired to fold up the flap 20, as shown in fig. 8, a transverse pushing force is applied to the flap 20, and the pushing force F1 is applied to the swing support 5 through the flap 20, so that the swing support 5 moves transversely and away from the hinge lug 42, and the locking pin is pulled out from the pin hole 421 by moving transversely until the sleeve 62 is completely pulled out from the pin hole 421, and the swing support 5 can be driven to swing around the hinge shaft 30 again due to the absence of the blocking force; at this time, the swing bearing 5 is located at the unlock position in the present embodiment in the axial direction of the hinge shaft 30. That is, in the present embodiment, the plurality of folding brackets are arranged side by side and are configured such that their hinge axes are axially parallel, so that all the pivoting supports can be synchronously moved synchronously in the axial direction for synchronous unlocking or locking based on the connection of the flaps.

With the swing support 5 swinging downward through an angle θ to the position shown in fig. 9, the swing support 5 and the flap 20 are located together in the folded stowed position in the present embodiment, effectively reducing the floor space. At this time, if the hand is released, the locking pin abuts against the arc-shaped strip-shaped flat rail 423 by the elastic restoring force of the compression spring 66, and the structure is as shown in fig. 10. If the flap 20 needs to be opened and is in the unfolded use position, an upward swinging force is applied to the flap 20, so that the sleeve 62 is driven to slide to a position near the pin hole 421 along the arc-shaped strip-shaped plane track 423 and then slide to the pin hole 421 along the obliquely arranged guide surface to realize locking again.

In this embodiment, the height of the arc-shaped strip-shaped plane track 423 is equal to the length of the T-shaped plastic stop collar 63 extending out of the hinge hole 520, that is, before the locking movement is performed to abut against the arc-shaped strip-shaped plane track 423, the arc-shaped strip-shaped plane track 423 abuts against and contacts with the outer side surface of the hinge ear seat 52, so that the swinging stability thereof can be improved.

It can be seen from the above description of the working process that in the using process, the turning plate 20 is only needed to be grasped by one hand for operation, so that the folding and unfolding of the turning plate can be realized, the locking mechanism can be unlocked based on the pushing of the turning plate 20 along the transverse movement, namely, the turning plate 20 and the swing support 5 are utilized to construct the unlocking mechanism for driving the locking structure to unlock, so that the whole structure is simpler, and the structure is more compact.

In use, the hinge lug 42 together with the hinge lug 41 form a limit for the pivoting support 5 to move in the axial direction of the hinge shaft 30, so that it can only move back and forth between the unlocked position and the locked position, i.e. the hinge lug 42 forms a locking limit hinge lug in the present embodiment and the hinge lug 41 forms an unlocking limit hinge lug in the present embodiment.

Namely, the swing support 5 can be hinged on the mounting support 4 in a swinging manner between the unfolding use position and the folding and folding position, namely, the swing support can at least swing back and forth between the unfolding use position and the folding and folding position around the hinge shaft 30, and the swing support 5 can move back and forth between the unlocking position and the locking position along the axial direction of the hinge shaft 30; the elastic restoring force of the compression spring 66 is used to force the swing support to have a tendency to move to the locking position, and when the swing support is not acted by an external force, the swing support moves to the locking position, that is, the compression spring 66 constitutes a return spring in the embodiment, and the elastic restoring force of the return spring forces the swing support to move to the locking position along the axial direction.

In the present embodiment, the locking pins are arranged side by side in parallel with the hinge shaft 30 with a spacing therebetween in the axial direction perpendicular to the hinge shaft, so that during the support, one forms a support and the other forms a pull-down force, thereby providing the flap with an upward bearing capacity based on the principle of leverage.

When the swing support swings to the unfolding use position, the locking pin is located at the position aligned with the pin hole, and when the swing support is located at the locking position, the locking pin is provided with a rod section part inserted into the pin hole, and can be driven by the swing support to be completely pulled out of the pin hole when the swing support moves to the unlocking position.

Example 2

As shown in fig. 11 to 16, the folding bracket 3 includes a mounting bracket 4, a swing bracket 5 whose fixed end is hinged on the mounting bracket 4 by a hinge shaft 30, and a locking mechanism for locking a swing state of the swing bracket 5 around the hinge shaft 30 at a target position.

The mounting bracket 4 includes a mounting base plate 40, and a hinge eyelet hole seat 41 and a hinge eyelet hole seat 42 which extend from an outer plate surface of the mounting base plate 40 to be bent outward by 90 degrees and are oppositely arranged, a hinge shaft hole 410 through which one end of the hinge shaft 30 passes is provided on the hinge eyelet hole seat 41, and a hinge shaft hole 420 through which the other end of the hinge shaft 30 passes is provided on the hinge eyelet hole seat 42, thereby fixedly mounting the hinge shaft 30 on the mounting bracket 4. A plurality of mounting through holes 400 are formed in the mounting base plate 40 for fastening screws to pass therethrough so as to fix the mounting bracket 4 to a target object such as the vertical fixing plate 10. The mounting support 4 can be formed by directly bending a whole steel plate body, and can also be formed by welding steel plate blocks cut by scattered blocks.

The hinge lug hole seat 42 is provided with hinge shaft holes 420 which are arranged side by side, pin holes 421 with a distribution distance L are arranged between the central axes of the hinge shaft holes and the pin holes, and an arc locking groove 423 is concavely formed in the inner side surface of the hinge lug seat 42, the arc central line of the arc locking groove 423 takes the central axis of the hinge shaft hole 420 as the center of a circle, the radius is equal to the distribution distance L, and the track width is equal to the hole diameter of the pin holes 421; correspondingly, an arc-shaped through hole 411 is arranged on the hinge lug seat 41, the arc-shaped center line of the arc-shaped through hole 411 takes the central axis of the hinge shaft hole 420 as the center of a circle, and the radius is equal to the arrangement distance L; wherein, the arc through-hole constitutes the arc slide opening in this embodiment for the locking pin keeps in it all the time in the swing around the hinge axle, so as to can provide spacing support.

The swing bracket 5 includes an outer link plate 50, and a hinge eye seat 51 and a hinge eye seat 52 which extend from a lower plate of the outer link plate 40 to face downward by 90 degrees and are oppositely arranged, a hinge shaft hole 510 through which one end of the hinge shaft 30 passes is provided on the hinge eye seat 51, and a hinge shaft hole 520 through which the other end of the hinge shaft 30 passes is provided on the hinge eye seat 52, thereby hinging the hinge end of the swing bracket 5 to the mounting bracket 4. The guide hole 511 spaced apart from the hinge hole 510 by the aforementioned arrangement distance L is provided in the ear seat of the hinge eye seat 51, and the guide hole 521 spaced apart from the hinge hole 520 by the aforementioned arrangement distance L is provided in the hinge eye seat 52, and both the guide holes are arranged on the same center axis. In the present embodiment, a plurality of mounting through holes 500 are provided on the outer connecting plate 50, and are connected with the turning plate 20 based on screws passing through them, thereby fixedly connecting the turning plate 20 to the swing support; the length directions of the hinge lug seat 51 and the hinge lug seat 52 extend to be approximately equal to the length direction of the outer connecting plate 50, so that a reinforcing rib plate is formed, the structural strength of the whole swing support 5 is improved, and the larger load bearing capacity is improved for the turning plate 20.

(1) one end of the locking pin 68 is inserted from the end of the arc-shaped through hole 411, and then passes through the guide hole 521, the locking pin comprises a rod part and an expansion joint 680 which is fixedly arranged at the central area of the rod part and has an outer diameter larger than the hole diameters of the guide hole 421 and the arc-shaped through hole 411, that is, in the embodiment, the arc-shaped through hole 411 also forms the guide hole of the locking pin 68; and a bias return spring, which is a compression spring 67, is fitted over the stem portion with one end pressing against the expansion joint 680.

(2) Penetrating a steel hinge shaft 30 with one end being an expansion end from the end side of the hinge lug seat 42, sequentially passing through a hinge shaft hole 420, a hinge shaft hole 520, a hinge shaft hole 521, an annular gasket 63, a compression spring 66 and a hinge shaft hole 421, and pressing to expand the end at the other end molding part of the hinge shaft 30 so as to fixedly connect the swing support 5 to the mounting support 4; and the compression spring 55 is pressed between the hinge lug seat 51 and the hinge lug seat 41, that is, one end of the compression spring 66 is pressed against the side surface of the swing support 5, the other end is pressed against the inner side surface of the hinge lug seat 41, and the elastic restoring force thereof forces the swing support 5 to move towards the direction close to the hinge lug seat 42; while the other end of the compression spring 67 is pressed against the inner side of the hinge lug 41.

After the installation is completed, the pin hole 421 is located on the projection of the swing track formed by the locking pin 68 around the hinge shaft 30 on the inner side surface of the hinge lug 42, that is, on the projection of the swing track of the locking pin 68, and furthermore, the arc-shaped center line of the arc-shaped locking groove 423 coincides with the center line of the projection of the swing track; during the swinging process, if the swinging support 5 is pushed away from the hinge ear seat 42 without external force arranged along the transverse direction, and the locking pin 68 swings to the position aligned with the pin hole 421, that is, the projection of the locking pin 68 on the inner side surface of the hinge ear seat 42 is completely covered by the pin hole 421, under the elastic restoring force of the compression spring 66, the swinging support 5 is driven to approach the hinge ear seat 42, and under the elastic restoring force of the compression spring 67, the expansion joint 680 is driven to be always kept to abut against the outer side surface of the hinge ear seat 51, so as to be inserted into the pin hole 421 as the swinging support 5 moves, the swinging support 5 is prevented from continuously swinging around the hinge shaft 30, so as to lock the swinging support 5 at the position, that is, the swinging motion of the swinging support 5 around the hinge shaft is locked at the unfolding use position in the embodiment, and the overall structure position is arranged as shown in fig. 13, that is, the locking pin 68 and the pin hole 421 together constitute the locking mechanism in this embodiment; and the rocking support 5 is located at the position nearest to the hinge lug 42 by the elastic restoring force of the compression spring 66, that is, the position of the rocking support 5 in the axial direction of the hinge shaft 30 is the locking position. At this point, the flap 20 is in the extended use position, supported by the swing support 5, and the table top is arranged horizontally for the flap-type table in this embodiment.

If it is desired to fold up the flap 20, as shown in fig. 1 and 14, a transverse pushing force is applied to the flap 20, and the pushing force applies a transverse pushing force F1 to the swing bracket 5 through the flap 20, so that the swing bracket 5 moves transversely and away from the hinge lug 42, and the locking pin is pulled out from the pin hole 421 by moving transversely until the locking pin 68 is completely pulled out from the pin hole 421, and the swing bracket 5 can be driven to swing around the hinge shaft 30 again due to the absence of a blocking force; at this time, the swing bearing 5 is located at the unlock position in the present embodiment in the axial direction of the hinge shaft 30.

With the swing support 5 swinging downward through the angle θ to the position shown in fig. 15, the swing support 5 and the flap 20 are located together in the folded stowed position in the present embodiment, effectively reducing the floor space. At this time, when the user releases his/her hand, the locking pin 68 is moved by the elastic restoring force of the compression spring 66 and inserted into the arc-shaped locking groove 423, and at this time, as shown in fig. 16, the folded and retracted state is locked, and the horizontal position of the flap is located at the extended use position, so that the outward protrusion of the flap 20 in the horizontal direction with respect to the boundary of the vertical fixing plate 10 is effectively prevented. If the flap 20 needs to be opened and is located at the unfolding use position, a transverse force F1 is firstly applied to the flap 20 to decouple the locking pin 68 from the arc-shaped locking groove 423, and then an upward swinging force is applied to drive the locking pin 68 to swing to be located outside the arc-shaped locking groove 423 and abut against the inner side surface of the hinge lug seat 42, so that the flap swings a certain angle and slides to be located at the position of the pin hole 421, and then the flap is inserted into the pin hole 421 to realize locking again. In the present embodiment, the locking pin 68 is inserted into the arcuate locking groove 423 to a depth equal to or greater than the depth of insertion thereof into the pin hole 421.

Namely, the swing support 5 can be hinged on the mounting support 4 in a swinging manner between the unfolding use position and the folding and folding position, namely, the swing support can at least swing back and forth between the unfolding use position and the folding and folding position around the hinge shaft 30, and the swing support 5 can move back and forth between the unlocking position and the locking position along the axial direction of the hinge shaft 30; the elastic restoring force of the compression spring 66 is used to force the swing support 5 to have a tendency to move to the locking position when no external force is applied, that is, the compression spring 66 constitutes the return spring in the embodiment, and the elastic restoring force of the return spring forces the swing support to move to the locking position in the axial direction.

When the swing support is swung to the unfolding use position, the locking pin 68 is positioned to be aligned with the pin hole 421, and when the swing support 5 is positioned at the locking position, the locking pin 68 has a rod section part inserted into the pin hole, and the locking pin 68 is pressed by the elastic restoring force of the compression spring 67, so that the locking pin can be driven by the swing support 5 to be completely pulled out of the pin hole 421 when the swing support 5 is moved to the unlocking position.

Example 3

As an explanation of embodiment 3 of the present invention, only the differences from embodiment 2 described above will be explained below.

Referring to fig. 17, in the present embodiment, the inner side surface of the locking hinge ear seat of the mounting seat 4 is a plane structure, i.e. a plane track in the swing track projection; at this time, if the swing support 5 is located at the folded and retracted position, under the elastic restoring force of the return spring, a thrust F2 in the axial direction of the hinge shaft 30 is applied to the swing support 5 through the washer 67, and the end surface of the locking pin 68 abuts against the inner side surface of the locking hinge lug to compress the return spring sleeved outside the locking pin; the expansion joint 680 pushes and presses a compression spring sleeved outside the locking pin to realize that the swing support 5 can be reset to a locking position, so that the flap fixedly arranged on the expansion joint can be positioned at the locking position in the axial direction of the hinge shaft 30 and is the same as the position when the flap is unfolded for use, and the position of the flap can be effectively prevented from being misplaced relative to the fixed position.

In the above embodiment, the mounting support 4 and the swing support 5 are both of a plate structure, and may also be constructed by other structures, for example, a mounting groove is machined on a block structure, and a hinge shaft hole and a pin hole are arranged on the mounting groove to construct the mounting support; the swing support is a rod body or a block body structure provided with a hole for mounting a locking pin and a through hole for the hinge shaft to pass through. The wall surface of the groove with the pin hole forms the wall blocking part in the embodiment, and the port of the pin hole is arranged on the wall surface of the wall blocking part; the specific structure of the wall surface of the retaining wall part can be a plane structure in the above embodiment, and a convex slideway, an arc-shaped locking groove or a locking hole which is matched with the locking pin is arranged on the plane structure; the wall surface is convexly provided with a convex plane track which is higher than the port at the projection position of the swing track, or the wall surface is a plane track which is level with the port at the front end part of the projection position of the swing track, the main body part of the projection position of the swing track is a convex plane track which is higher than the port and a locking groove for inserting a locking pin at the tail end part of the projection position of the swing track, or the wall surface is a locking groove for inserting the locking pin at the tail end part of the projection position of the swing track and a plane track which is level with the port at the rest part, or the wall surface is a locking arc-shaped groove for inserting the locking pin at the rear section part of the projection position of the swing track and a plane track which is level with the port; the swinging track projection is the projection of the track between the locking pin swinging from the unfolding use position to the folding storage position around the hinge shaft on the wall surface.

In the above-described embodiment, the return spring constructed using the compression spring constitutes the elastic return mechanism in the present embodiment, and the offset return spring constructed using the compression spring constitutes the elastic offset return mechanism in the present embodiment, and they may be constructed using, in addition to the compression spring in the above-described embodiment, a tension spring, the position of which may be laid at the right position of the hinge lug 42.

In the above embodiment, by providing the slot structure at the end of the swing track projection, the compression amount of the compression spring can be prevented from being too large when the folding and retracting position is performed; based on this, it is preferable to provide an arc-shaped groove section on the whole swing trajectory projection or at least on the rear section thereof, the arc-shaped groove section gradually decreases in groove depth along the direction close to the pin hole to form an obliquely arranged and smoothly extending leading-in and leading-out surface, and the arc-shaped groove section smoothly abuts on the wall surface where the pin hole is located or the end surface of the pin hole at the end close to the pin hole, so that the feeling of jerk during the swing can be effectively simplified. In addition, a plurality of pin holes matched with the locking pins can be arranged on the projection of the swing track at intervals, so that the turnover plate can be locked at different angle positions.

In the present invention, the "unfolding use position" and the "folding storage position" are relative, in the above embodiment, the unfolding position is that the swing support is arranged at an angle of 90 degrees relative to the mounting support, and the folding position is that the angle between the two is an acute angle, usually within 45 degrees, and preferably the swing support is arranged vertically after being folded.

Claims

1. A sliding unlocking type plate turnover device comprises a turnover plate and a folding support, wherein the folding support comprises an installation support, a swinging support which can be hinged to the installation support in a swinging mode between an unfolding use position and a folding storage position, and a locking mechanism which is used for unlocking the swinging support at the unfolding use position; the turning plate is fixedly arranged on the swinging support; the method is characterized in that:

the swing support can move back and forth between an unlocking position and a locking position along the axial direction of the hinge shaft; a return spring is arranged on the mounting support, and the elastic restoring force of the return spring forces the swinging support to move to the locking position along the axial direction; the locking mechanism comprises a locking pin which is arranged on the swinging support and is parallel to the hinge shaft side by side, and a pin hole which is arranged on the mounting support;

when the swinging support is swung to the unfolding use position, the locking pin is located at a position aligned with the pin hole, when the swinging support is located at the locking position, the locking pin is provided with a rod section part inserted into the pin hole, and the locking pin can be driven by the swinging support and can be completely pulled out of the pin hole when the swinging support is moved to the unlocking position.

2. The slide unlocking flap device according to claim 1, wherein:

the mounting support comprises a mounting bottom plate, and a locking limiting hinge lug seat and an unlocking limiting hinge lug seat which extend outwards from the outer plate surface of the mounting bottom plate and are oppositely arranged; hinge shaft holes matched with the end parts of the hinge shafts are formed in the locking limiting hinge lug seat and the unlocking limiting hinge lug seat respectively, the reset spring is a compression spring sleeved on the hinge shafts, one end of the compression spring is pressed against the side surface of the swinging support, and the other end of the compression spring is pressed against the inner side surface of the locking limiting hinge lug seat;

the locking pin comprises a screw and an upper sleeve screwed at the tail end part of the screw, and the swinging support is provided with an installation screw hole screwed with the screw and used for fixing the screw; the pin holes are distributed on the unlocking limit hinge lug seats; the inner side surface of the unlocking limit hinge lug seat is of a flat plate surface structure; the dull and stereotyped face structure has laid arc groove section at the middle-back section department of swing orbit projection at least, arc groove section is along being close to the pinhole direction, the groove depth is shallow gradually, and at groove end department with dull and stereotyped face structure is smooth to be adjoined, keeping away from the groove end portion of pinhole can hold pole section portion and degree of depth more than or equal to the length of pole section portion, swing orbit projection is the stop pin winds the hinge axle is followed expand the service position and swing to the track between the folding packing up position is in the structural projection of dull and stereotyped face.

3. The slide unlocking flap device according to claim 1, wherein:

the swing support is provided with a guide hole; the locking pin comprises a rod part which can be sleeved in the guide hole in a reciprocating manner along the axial direction of the locking pin, and an expansion joint which is fixedly arranged at the central area of the rod part and has an outer diameter larger than the aperture of the guide hole; an offset return spring which is a compression spring is sleeved on the rod part, one end of the offset return spring is abutted against the expansion joint, and the other end of the offset return spring is abutted against the inner side surface of the locking limit hinge lug seat; one end part, far away from the expansion joint, of the rod section part sleeved with the compression spring is sleeved with an arc-shaped sliding hole formed in the unlocking limiting hinge lug seat, and the end part of the pin slides along the arc-shaped sliding hole in the process of swinging around the hinge shaft along with the pin; the pin holes are distributed on the unlocking limit hinge lug seats; the inner side surface of the unlocking limit hinge lug seat is of a flat plate surface structure; the dull and stereotyped face structure has laid arc groove section at the middle-back section department of swing orbit projection at least, arc groove section is along being close to the pinhole direction, the groove depth is shallow gradually, and at groove end department with dull and stereotyped face structure is smooth to be adjoined, keeping away from the groove end portion of pinhole can hold pole section portion and degree of depth more than or equal to the length of pole section portion, swing orbit projection is the stop pin winds the hinge axle is followed expand the service position and swing to the track between the folding packing up position is in the structural projection of dull and stereotyped face.

4. The slide unlocking flap device according to claim 1, wherein:

the return spring is a compression spring sleeved outside the hinge shaft, one end of the compression spring is pressed against the side face of the swinging support, and the other end of the compression spring is pressed against the mounting support.

5. The slide unlocking type flap device according to claim 1 or 4, wherein:

the locking pin is fixedly connected with the swinging support; or the like, or, alternatively,

the swing support is provided with a guide hole, the locking pin can be sleeved in the guide hole in a reciprocating manner along the axial direction of the locking pin, and can move towards the direction far away from the pin hole along the axial direction of the guide hole by an offset distance; the offset distance is larger than or equal to the distance between the locking position and the unlocking position, an offset return spring is sleeved on the locking pin, and the elastic restoring force of the offset return spring forces the locking pin to move towards the direction close to the pin hole.

6. The slide unlocking flap device according to claim 5, wherein:

the locking pin is movably arranged on the swinging support along the guide hole; an expansion joint with the outer diameter larger than that of the guide hole is arranged on the rod part of the locking pin, and the expansion joint is positioned on one side of the swing support, which is far away from the pin hole; one end of the offset return spring is pressed against the end face, deviating from the pin hole, of the expansion joint, and the other end of the offset return spring is pressed against the mounting support.

7. The slide unlocking flap apparatus according to any one of claims 1 and 4 to 6, wherein:

a wall blocking part is arranged on the mounting support, and a port of the pin hole is arranged on the wall surface of the wall blocking part; along the axial direction of the pin hole, a raised plane track higher than the port is convexly arranged on the wall surface at the projection position of the swing track, or the wall surface at the projection position of the swing track is a plane track which is level with the port, or the wall surface at the front end part of the projection position of the swing track is a plane track which is level with the port, a main body part of the projection position of the swing track is a raised plane track higher than the port, and a locking groove for inserting the locking pin is arranged at the tail end part of the projection position of the swing track, or the wall surface at the tail end part of the projection position of the swing track is a locking groove for inserting the locking pin and at the rest part is a plane track which is level with the port, or the wall surface at the rear section part of the projection position of the swing track is a locking arc-shaped groove for inserting the locking pin and at the front section is a plane track which is level with the port, or the wall surface is at least provided with an arc groove section at the middle rear section of the swing track projection, or the wall surface is provided with a plurality of pin holes matched with the locking pins at intervals on the swing track projection; the swinging track projection is the projection of the track between the locking pin swinging from the unfolding use position to the folding storage position around the hinge shaft on the wall surface.

8. The slide unlocking type flap device according to claim 7, wherein:

the arc-shaped groove section is gradually shallow along the direction close to the pin hole, the groove end is smoothly adjacent to the wall surface, the tail end of the groove far away from the pin hole can accommodate the rod section part, and the groove depth is larger than or equal to the length of the rod section part;

the main body portion of the wall surface is a plane that is normal to the axial direction of the pin hole, and is flush with the port in the axial direction of the pin hole.

9. The sliding unlocking flap device according to claim 7 or 8, wherein:

the mounting support comprises a mounting bottom plate, and a locking limiting hinge lug seat and an unlocking limiting hinge lug seat which extend outwards from the outer plate surface of the mounting bottom plate and are oppositely arranged; hinge shaft holes matched with the end parts of the hinge shafts are formed in the locking limiting hinge lug seat and the unlocking limiting hinge lug seat;

the inner side surface of the unlocking limit hinged ear seat forms the wall surface.

10. The utility model provides a panel turnover formula desk, includes vertical fixed plate and fixes the flap device on vertical fixed plate through the fastener which characterized in that:

the flap device is a sliding unlocking flap device as claimed in any one of claims 1 to 9; the flap constitutes a table top panel arranged horizontally in the unfolded use position.