CN113772024B

CN113772024B - Marine shockproof table

Info

Publication number: CN113772024B
Application number: CN202111329586.2A
Authority: CN
Inventors: 杨宏伟; 闫玉刚; 高福庭
Original assignee: Binzhou University
Current assignee: Binzhou University
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-02-18
Anticipated expiration: 2041-11-11
Also published as: CN113772024A

Abstract

The embodiment of the application discloses a marine shockproof table, which belongs to the technical field of marine auxiliary equipment and comprises a table body, a fixed table top plate, a lifting assembly and a triggering module; the fixed desktop plate is fixedly connected with the desk body and is provided with a containing opening; the lifting component is respectively connected with the desk body and the lifting desk panel; the trigger module is electrically connected with the lifting assembly; when the triggering module is triggered, the lifting assembly drives the lifting table panel to move into the table body from the storage opening along the height direction of the table body, and the shockproof table has the function of storing articles placed on the lifting table panel when the ship body shakes violently.

Description

Marine shockproof table

Technical Field

The application relates to marine auxiliary assembly technical field especially relates to a marine table that takes precautions against earthquakes.

Background

The ship sails on the sea, so that sailors need to live a long time on the sea, and the table naturally becomes an indispensable ship device; when the ship encounters sea waves, the ship body jolts greatly, so that objects placed on a table by crews fall off, and therefore the objects on the table are lost, and disorder in the ship is caused.

Disclosure of Invention

The embodiment of the application provides a marine table that takes precautions against earthquakes, it can take in the article of placing on the lift desktop board when the hull takes place violently to rock.

The embodiment of the application provides marine table that takes precautions against earthquakes, includes:

a table body;

the fixed desktop plate is fixedly connected with the desk body and is provided with a containing opening;

a lifting table panel;

the lifting component is respectively connected with the desk body and the lifting desk panel;

the trigger module is electrically connected with the lifting assembly;

when the trigger module is triggered, the lifting component drives the lifting table panel to move into the table body from the storage opening along the height direction of the table body.

According to marine table that takes precautions against earthquakes of this application embodiment, take place to jolt enough to trigger the trigger module on the table body when the hull after, triggered trigger module sends a signal to lifting unit, then drive the lifting table board by lifting unit and remove to the table internally from the mouth of accomodating along the direction of height of the table body, make the article of placing on the lifting table board accomodate to the table internally, prevent to shake the article that leads to on the table body and lose because of the hull drives the table that takes precautions against earthquakes.

In some embodiments of the present application, the lift assembly comprises:

one or more bi-directional screws rotatably coupled to the table body;

a plurality of axial moving members threadedly coupled to the bidirectional threaded member;

one end of each supporting piece is rotatably connected with the lifting table panel, and the other end of each supporting piece is rotatably connected with one axial moving piece;

the driving piece is used for driving the bidirectional threaded piece to rotate around the axis of the driving piece;

the two axial moving pieces are connected with each two-way threaded piece, the axial lines of the two supporting pieces connected with the same two-way threaded rod through the axial moving pieces form an included angle, and the included angle between the axial line of each supporting piece and the axial line of the two-way threaded piece is equal; or

One or more one-way screws rotatably connected to the table body;

one or more axial moving members threadedly coupled to the one-way threaded member;

one or more supporting pieces, wherein two ends of each supporting piece are respectively and rotatably connected with the lifting desktop plate and the axial moving piece;

the driving piece is used for driving the one-way threaded piece to rotate around the axis of the one-way threaded piece;

the guide piece is fixedly connected with the table body at the edge of the containing opening and is positioned in the table body;

the lifting table top plate is connected with the guide piece in a sliding mode, and the axial moving piece is connected with the guide piece in a sliding mode.

Based on the above embodiment, after the driving member receives the instruction sent by the triggering module, the driving member drives the bidirectional screw rod to rotate around the axis of the bidirectional screw rod, and then the axial moving member in threaded connection with the bidirectional screw rod moves along the axis direction of the bidirectional screw rod; because there is the guide, consequently, adopt one-way screw spare and on every one-way screw spare threaded connection an axial moving member can realize that the lift desktop board can remove to the desktop in the mouth from accomodating or the lift desktop board removes the department desktop from the accomodating in, the structure is simpler.

In the same way, the driving piece receives the instruction back that trigger module sent, the driving piece drives one-way hob and rotates around self axis, so with one-way threaded rod threaded connection's axial moving piece will remove along one-way threaded rod's axis direction, because, support piece's one end rotatable coupling axial moving piece, other end rotatable coupling lift desktop board, and lift desktop board and guide sliding connection, so, along with one-way threaded rod's rotation, the contained angle between support piece's axis and one-way threaded rod's the axis will change, the lift desktop board removes along the direction of height of the table body via the direction of guide, it can remove to the table body in the storage port or the lift desktop board removes from the storage port in the table body to have realized the lift desktop board.

In some embodiments of the present application, the fixed table top has a receiving cavity therein, which is communicated with the receiving opening; the shockproof table further comprises:

the covering component is positioned in the accommodating cavity; the traction assembly is connected with the bidirectional threaded piece or the unidirectional threaded piece and is connected with the covering assembly;

the retracting piece is respectively connected with the covering component and the table body;

when the lifting assembly drives the lifting table panel to move into the table body from the accommodating port along the height direction of the table body, the traction assembly pulls the covering assembly to slide out of the accommodating cavity and cover the accommodating port; when the lifting component drives the lifting table panel to move out of the table body from the storage opening along the height direction of the table body, the retracting component pulls the covering component to slide into the containing cavity.

Based on the embodiment, along the height direction of the table body, when the top surface of the lifting table top plate is flush with the top surface of the fixed table top plate, the covering component is positioned in the accommodating cavity; when the lifting component drives the lifting desk panel to move into the desk body from the accommodating port along the height direction of the desk body, the traction component drives the covering component to move out of the accommodating cavity and cover the accommodating port, so that objects on the lifting desk panel are accommodated into the desk body to form a closed space, and the objects accommodated into the desk body are prevented from being ejected out of the desk body through the accommodating port; when the lifting component drives the lifting desk panel to move out of the desk body from the accommodating port along the height direction of the desk body, the back traction component drives the covering component to move into the accommodating cavity and retract into the accommodating cavity, so that the lifting desk panel can move out of the desk body, and the top surface of the lifting desk panel is flush with the top surface of the fixed desk panel.

In some embodiments of the present application, the fixed table top plate is provided with sliding grooves at two side edges of the receiving opening adjacent to the accommodating cavity; the shockproof table further comprises: the connecting piece is arranged at the end, far away from the bottom wall of the accommodating cavity, of the two adjacent side edges of the covering assembly and the accommodating cavity and is positioned in the sliding groove; the tow assembly includes:

one or more winding parts fixedly sleeved on any two-way threaded rod or any one-way threaded rod;

one or more pull wires, wherein part of the pull wires are positioned in the sliding groove, one end of each pull wire is fixedly connected with the connecting piece, and the other end of each pull wire is fixedly connected with the wire winding piece;

one or more reversing pieces are rotatably connected with the table body, and part of the pull wire is wound on the reversing pieces.

Based on the embodiment, when the bidirectional threaded part rotates to drive the lifting table panel to move from the storage port to the table body along the height direction of the table body, the rotating bidirectional threaded part drives the winding part sleeved on the bidirectional threaded part to synchronously rotate to wind the pull wire on the winding part, and the pull wire drives the covering assembly to move along the length direction of the sliding groove and finally cover the storage port along with the winding part wound with the pull wire; because the two-way screw is positioned below the fixed desktop plate and the pull wire is positioned in the sliding groove arranged on the fixed desktop plate, a reversing piece is needed to realize the reversing of the pull wire; because the stay wire is positioned in the moving groove, the stay wire can not influence the lifting table panel to move out of the storage opening or move into the table body. Similarly, the one-way threaded part can achieve the same effect by matching with the winding part, the pull wire and the reversing part.

In some embodiments of the present application, the tow assembly further comprises:

and the torsion spring is fixedly sleeved on the two-way threaded part or the one-way threaded part, the inner side end is fixedly connected with the two-way threaded part or the one-way threaded part, and the other end is fixedly connected with the wire winding part.

Based on above-mentioned embodiment, when the rotatory direction of height that drives the lift desktop board along the table body of two-way screw spare removed to the internal time of table from the storage port, rotatory two-way screw spare makes the torsional spring take place to deform earlier, in this period of time, the lift desktop board descends certain distance along the direction of height of the table body, article on the lift desktop board have been accomodate to the table body promptly, prevent that article on the lift desktop board from closing storage port to hiding the subassembly and causing the influence, the torsional spring takes place deformation back completely, rotatory two-way screw spare just can drive the winding spare that the cover was established on it and rotate in step and will draw the line winding to the winding spare on, the realization is covered the subassembly and is closed the lid of storage port.

In addition, when the torsion spring is not arranged, the sudden starting of the driving part can apply a large pulling force to the stay wire, and after the torsion spring is arranged, the force applied to the stay wire due to the sudden starting of the driving part is absorbed by the torsion spring to protect the stay wire, so that the service life of the stay wire is prolonged.

Similarly, the one-way threaded member can also perform the same function in cooperation with the torsion spring.

In some embodiments of the present application, the cover assembly includes a plurality of folding members, adjacent folding members being hinged to each other; and the folding piece far away from the bottom wall of the accommodating cavity is fixedly connected with the pull wire.

Based on the above embodiment, after the covering component is formed by hinging the plurality of folding pieces, the plurality of folding pieces can be stacked up, so that the volume of the covering component is reduced, namely, the space of the holding cavity for fixing the table top board is reduced.

In some embodiments, each of the folding members has a through hole, and the retracting member 60 is an elastic retracting wire, which penetrates through the through hole of each of the folding members, and has one end fixedly connected to the folding member farthest from the bottom wall of the accommodating cavity and the other end fixedly connected to the bottom wall of the accommodating cavity.

Based on the embodiment, when the bidirectional threaded part rotates to drive the lifting table panel to move out of the table body from the accommodating port along the height direction of the table body, the elastic back-pulling line drives the folding piece farthest from the bottom wall of the accommodating cavity to contract due to the elasticity of the elastic back-pulling line, so that the covering component is recovered into the accommodating cavity; meanwhile, as the elasticity of the elastic retracing line is greater than that of the torsion spring, when the bidirectional threaded piece starts to rotate, the elastic retracing line starts to drive the covering assembly to move towards the accommodating cavity along the length direction of the sliding groove without waiting for the force unloading of the torsion spring; and when the two-way screw member rotates to drive the lifting table panel to move to the table body from the storage opening along the height direction of the table body, because the elastic force of the elastic back-pulling line is greater than that of the torsion spring, the lifting table panel can still be ensured to descend along the height direction of the table body by a certain distance, the torsion spring can complete the complete deformation, and at the moment, the pull wire can pull the covering assembly to slide along the length direction of the sliding groove and cover the storage opening.

In some embodiments of the application, a sliding hole is formed in one side of the table body, which is far away from the fixed table top plate; the shockproof table further comprises:

one end of the sliding component penetrates through the sliding hole and is connected with the table body in a sliding mode, and the other end of the sliding component penetrates through the outer side of the sliding hole;

the shock-absorbing piece is positioned in the sliding hole, one end of the shock-absorbing piece is abutted to the bottom wall of the sliding hole, and the other end of the shock-absorbing piece is abutted to one end, in the sliding hole, of the sliding assembly.

Based on the above embodiment, when the ship body jolts, the up-and-down movement generated by the ship body is transmitted to the sliding assembly, so that the sliding assembly slides in the sliding hole along the axis direction of the sliding hole, however, as the damping piece is arranged between the sliding assembly and the bottom wall of the sliding hole, the damping piece converts the kinetic energy of the sliding assembly into the elastic potential energy, and the table body is damped.

In some embodiments of the present application, the triggering module comprises:

the trigger piece is fixedly connected with one end of the sliding assembly in the sliding hole;

the trigger element is positioned in the sliding hole and fixedly connected with the bottom wall of the sliding hole, and the trigger element is electrically connected with the driving piece;

and the triggering part is gradually close to the triggering element along with the gradual contraction of the shock absorption part and can be abutted against the triggering element.

Based on the above embodiment, the ship body jolts too violently, so that the shock absorbing member is compressed until the triggering member abuts against the triggering member, at this time, the triggering member is triggered by the triggering member, the triggering member sends a signal to the driving member, and the driving member starts to drive the two-way screw member or the one-way screw member to start rotating, so that the lifting table panel is retracted into the table body from the storage opening, and the objects placed on the lifting table panel are stored.

In some embodiments of the present application, the table body further comprises: the limiting ring is fixedly connected with the table body at the opening edge of the sliding hole on the table body;

the sliding assembly includes:

the limiting block is positioned in the sliding hole and is in sliding connection with the table body;

one end of the sliding rod penetrates through the inner ring of the limiting ring to be fixedly connected with the limiting block, and the other end of the sliding rod is positioned outside the sliding hole; the limiting block and/or the sliding rod are/is in sliding connection with the table body, and the orthographic projection of the limiting block on the limiting ring is at least overlapped with part of the limiting ring.

Based on above-mentioned embodiment, stopper and/or slide bar among the sliding component are via sliding hole and the sliding connection of the table body, in order to prevent that the sliding component from deviating from the sliding hole, the orthographic projection of stopper on the spacing ring coincides with partial spacing ring at least, has guaranteed that the sliding component can not deviate from the sliding hole.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a marine earthquake-proof table according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along section A-E-F-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of a marine shock table according to another embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of section B-B of FIG. 1;

FIG. 5 is an enlarged view of the structure of the portion C in FIG. 4;

FIG. 6 is a cross-sectional view of the winding member, torsion spring and double-thread member taken along the axis of the double-thread member according to one embodiment of the present application;

fig. 7 is an enlarged view of the structure of the portion D in fig. 4.

Reference numerals: 10. a table body; 11. fixing the table top plate; 111. a receiving opening; 112. a sliding groove; 113. an accommodating chamber; 12. a lifting table panel; 13. a slide hole; 20. a lifting assembly; 21. a bi-directional threaded member; 22. an axial moving member; 23. a support member; 24. a drive member; 25. a one-way threaded member; 26. a guide member; 30. a triggering module; 31. a trigger; 32. a trigger element; 40. a cover assembly; 41. a folding member; 411. inserting holes; 412. a connecting member; 50. a traction assembly; 51. a wire winding member; 52. a pull wire; 53. a reversing member; 54. a torsion spring; 60. a retracting member; 70. a sliding assembly; 71. a limiting block; 72. a slide bar; 80. a shock absorbing member; 90. a limit ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Generally, sailing crews at sea requires a long time to live at sea, the table is indispensable, and when the ship encounters sea waves, the ship body is greatly bumped, so that objects placed on the table by the crews fall off, which causes confusion in the ship and economic loss if the objects are valuables. Therefore, the invention discloses a device which can reduce the vibration caused by the bumping of a ship body, protect objects on a desk and prevent the objects from falling onto the ground.

The common shockproof structure that prevents desktop object desk that drops mainly has two kinds at present:

(1) the desktop is modified, a hole is formed in the desktop to place a water cup by changing the structural form of the desktop, so that water in the water cup is prevented from splashing in the bumping process of the ship body, or other fixing devices are arranged on the desktop to fix an object placed on the desktop.

(2) The base is fixed, fixes the table body on the hull, makes the table body and hull become an organic whole, avoids jolting the in-process table body and hull and takes place relative motion.

In order to solve the above technical problems, referring to fig. 1 to 7, an embodiment of the present invention provides a shockproof table for a ship, which can store objects placed on a lifting table panel when a ship body shakes.

Referring to fig. 1, 2 and 3, the marine earthquake-proof table includes a table body 10, a fixed table top 11, a lifting table top 12, a lifting assembly 20 and a triggering module 30; the fixed desktop plate 11 is fixedly connected with the desk body 10 and is provided with a containing opening 111; the lifting component 20 is respectively connected with the table body 10 and the lifting table panel 12; the trigger module 30 is electrically connected with the lifting assembly 20; when the triggering module 30 is triggered, the lifting component 20 drives the lifting table panel 12 to move from the storage opening 111 to the table body 10 along the height direction of the table body 10.

The table body 10 serves as a supporting base of the entire earthquake-proof table, and the specific shape, manufacturing material, size and the like of the table body 10 are not particularly limited in the embodiment of the present invention, but since the earthquake-proof table is used on a ship, the table body 10 should not only have sufficient strength to cope with the bumping of the ship, but also have small mass to reduce the weight of the table body 10, and therefore, in some embodiments of the present invention, the table body 10 is made of an aluminum alloy, and the aluminum alloy has low density, but high strength, and excellent corrosion resistance, and is suitable for an environment with high humidity of the ship.

The fixed desktop plate 11 is a part of the desktop on the desk body 10, in this application, the fixed desktop plate 11 is fixedly connected with the desk body 10 and does not move, in this application, specific shapes, manufacturing materials and sizes of the fixed desktop plate 11 are not specifically limited, but it should be at least ensured that, along the axial direction of the desk body 10, the orthographic projection of the fixed desktop plate 11 on the desk body 10 is not smaller than the desk body 10 so as to ensure that the fixed desktop plate 11 can cover the desk body 10, and for the same reason as the desk body 10, the fixed desktop plate 11 is made of aluminum alloy in this application.

In the embodiment of the present application, the specific shape, size and specific position of the receiving opening 111 on the fixed desktop plate 11 are not limited, but it should be ensured that along the axial direction of the table body 10, the orthographic projection of the receiving opening 111 on the table body 10 should coincide with all of the table body 10, and meanwhile, in order to enable the table body 10 to receive more articles, on the premise of ensuring the structural strength of the fixed desktop plate 11, the larger the area of the receiving opening 111 is, the better the larger the area is, so that the lifting desktop plate 12 with a larger area can be received into the table body 10 through the receiving opening 111.

The specific shape, manufacturing material, size and the like of the lifting table top 12 are not particularly limited in the embodiments of the present application, and for the same reason as the table body 10, in some embodiments of the present application, the lifting table top 12 is made of aluminum alloy; regarding the specific shape and size of the table top 12, in some embodiments of the present application, the specific shape and size of the table top 12 should be identical to the receiving opening 111; in other embodiments of the present disclosure, in order to prevent the lifting component 20 from driving the lifting table top 12 to be higher than the fixed table top 11 in the height direction of the table body 10, the receiving opening 111 is in a shape of an inverted flared opening, one end with a large opening is communicated with the inside of the table body 10, and an included angle is formed between the side wall of the lifting table top 12 and the height direction of the table body 10, and the side wall can be attached to the side wall of the receiving opening 111, for example, the receiving opening 111 is in a shape of an inverted trumpet, and the corresponding lifting table top 12 is in a shape of a truncated cone, and further, for example, the receiving opening 111 is in a shape of an inverted truncated pyramid, and the corresponding lifting table top 12 is in a shape of a truncated pyramid, so that the lifting table top 12 can be higher than the fixed table top 11 in the height direction of the table body 10.

Based on marine table that takes precautions against earthquakes of this application embodiment, take place to jolt enough to trigger the trigger module 30 on the table body 10 after the hull, triggered trigger module 30 sends the signal to lifting unit 20, then drive lift desktop board 12 by lifting unit 20 and remove to the table body 10 in along the direction of height of the table body 10 from storage port 111, make the article of placing on lift desktop board 12 accomodate to the table body 10 in, prevent to shake because of the hull drives the table that takes precautions against earthquakes and lead to the article on the table body 10 to lose.

Referring to fig. 2, in some embodiments of the present application, the lifting assembly 20 includes one or more two-way screws 21, a plurality of axial moving members 22, a plurality of supporting members 23, and a driving member 24, wherein the one or more two-way screws 21 are rotatably connected to the table 10; a plurality of axial moving members 22 are screwed with the bidirectional screw member 21; one end of each supporting piece 23 is rotatably connected with the lifting table panel 12, and the other end is rotatably connected with an axial moving piece 22; the driving piece 24 is used for driving the bidirectional screw 21 to rotate around the axis of the bidirectional screw; wherein, every two-way screw 21 is connected with two axial moving piece 22, and the axis of two support piece 23 that is connected through axial moving piece 22 and same two-way threaded rod is the contained angle setting, and the axis of every support piece 23 is equal with the contained angle of two-way screw 21 axis.

Two-way screw 21 and table body 10 swivelling joint for drive move along self axis direction with the axial displacement piece 22 of being connected, in some embodiments of this application, two-way screw 21 can be two-way threaded rod, and in this application embodiment, do not do specifically to the screw thread shape of two-way threaded rod, pitch, helical pitch and line number etc. simultaneously and restrict.

In some embodiments of the present application, when two or more of the two-way screws 21 are provided, the axes of the two-way screws 21 are parallel to each other, and any one of the two-way screws 21 is connected to the driving member 24, when the two-way screw 21 connected to the driving member 24 rotates to move the table top 12 along the height direction of the table body 10, the axis moving member 22 rotates the two-way screw 21 screwed to the axis moving member; or, a belt pulley is fixedly sleeved on the driving shaft of the driving part 24 and each bidirectional threaded part 21, a belt is wound among the belt pulleys, and the driving part 24 drives the bidirectional threaded parts 21 to rotate around the axis of the driving part through the belt and the belt pulleys.

In some embodiments of the present disclosure, the limiting member is connected to the circumferential wall of the two-way threaded member 21, and when the side of the lifting table top 12 away from the supporting member 23 is flush with the side of the fixed table top 11 away from the supporting member 23 in the height direction of the table body 10, any one of the axial moving members 22 abuts against the limiting member.

The axial moving member 22 is connected with the two-way screw member 21 by screw threads to convert the rotation of the two-way screw member 21 into linear motion, and the specific shape, size and material of the axial moving member 22 are not limited in this application, but the thread shape, thread pitch, thread lead, thread number and the like of the axial moving member 22 should be the same as those of the two-way threaded rod, and in some embodiments of this application, the axial moving member 22 may be provided as a nut.

In order to prevent the lifting table top plate 12 from being higher than the fixed table top plate 11, in some embodiments of the present application, when the axis of the supporting member 23 is parallel to the height direction of the table body 10, the side of the lifting table top plate 12 away from the supporting member 23 is flush with the side of the fixed table top plate 11 away from the supporting member 23 in the height direction of the table body 10 when the axis of the supporting member 23 is parallel to the height direction of the table body 10.

The driving part 24 is used for driving the bidirectional threaded part 21 to rotate, in some embodiments of the present application, the driving part 24 may be configured as a servo motor, an output shaft of the motor is coaxially and fixedly connected with the bidirectional threaded part 21, and a housing of the motor is fixedly connected with the table body 10; further, in some embodiments of the present application, the number of rotation turns of the servo motor may be set, so that after the servo motor rotates for the set number of turns, in the height direction of the table body 10, one side of the lifting table top plate 12 away from the supporting member 23 is flush with one side of the fixed table top plate 11 away from the supporting member 23; in combination with the above-mentioned situation that when the axis of the supporting member 23 is parallel to the height direction of the table body 10, in the height direction of the table body 10, the side of the lifting table top 12 away from the supporting member 23 is flush with the side of the fixed table top 11 away from the supporting member 23, in some embodiments of the present application, when the side of the lifting table top 12 away from the supporting member 23 is flush with the side of the fixed table top 11 away from the supporting member 23, the supporting member 23 is in a vertical state, i.e., the included angle between the axis of the supporting member 23 and the axis of the two-way screw 21 is a right angle.

After the driving member 24 receives the instruction sent by the triggering module 30, the driving member 24 drives the two-way screw rod to rotate around its own axis, so the axial moving member 22 screwed with the two-way screw rod will move along the axis direction of the two-way screw rod, because two axial moving members 22 are screwed on each two-way screw member 21, when the two-way screw members 21 rotate, the two axial moving members 22 screwed with the two-way screw members 21 will be far away from or close to each other according to the different turning directions of the two-way screw members 21, and one end of the supporting member 23 can be rotatably connected with the axial moving member 22, and the other end can be rotatably connected with the lifting table top plate 12, so when the two-way screw rod rotates, the included angle between the axis of the supporting member 23 and the axis of the two-way screw rod will change, that is, the height of the supporting member 23 in the height direction of the table body 10 will change, the lifting table panel 12 can move into the table body 10 from the storage opening 111 or the lifting table panel 12 moves into the table body 10 from the storage opening 111; due to the guide member 26, the one-way threaded members 25 and the axial moving member 22 screwed on each one-way threaded member 25 can enable the lifting table top panel 12 to move from the storage opening 111 into the table body 10 or move from the storage opening 111 into the table body 10, so that the structure is simpler; the included angle between the axis of each supporting member 23 and the axis of the two-way screw 21 is equal, so as to ensure that the lifting table top plate 12 is in a horizontal state.

Referring to fig. 3, in other embodiments of the present application, the lifting assembly 20 includes one or more one-way screws 25, one or more axial moving members 22, one or more supporting members 23, a driving member 24, and a guiding member 26, wherein the one or more one-way screws 25 are rotatably connected to the table 10; one or more axially-moving members 22 are threadedly coupled to one-way threaded member 25; two ends of one or more supporting pieces 23 are respectively and rotatably connected with the lifting table panel 12 and the axial moving piece 22; the driving piece 24 is used for driving the one-way screw 25 to rotate around the axis of the one-way screw; the guiding element 26 is fixedly connected to the table body 10 at the edge of the receiving opening 111 and is located in the table body 10; wherein, each one-way screw 25 is connected with at least one axial moving member 22 by screw thread, a plurality of supporting members 23 are arranged in parallel, and the lifting table top 12 is connected with the guiding member 26 by sliding.

The one-way threaded part 25 is rotatably connected with the table body 10 and is used for driving the axial moving part 22 connected with the one-way threaded part to move along the axis direction of the one-way threaded part, in some embodiments of the application, the one-way threaded part 25 can be a one-way threaded rod, and meanwhile, in the embodiments of the application, the thread shape, thread pitch, lead, thread number and the like of the one-way threaded rod are not specifically limited; meanwhile, in some embodiments of the present application, one axial-moving piece 22 may be threadedly connected to each one-way threaded rod, and in other embodiments of the present application, three axial-moving pieces 22 may be threadedly connected to each one-way threaded rod.

The guide 26 is used to guide the table top 12 so that the table top 12 can move along the height direction of the table body 10. in some embodiments of the present application, the guide 26 is a guide frame, and when the table top 12 moves along the height direction of the table body 10, the guide abuts against the inner wall of the guide frame and moves along the axial direction of the guide frame.

In the present embodiment, the axial moving member 22, the supporting member 23 and the driving member 24 are the same as those in the above embodiment, and a limiting member can also be applied to the one-way threaded member 25 in the present embodiment.

Referring to fig. 4 and 5, in some embodiments of the present application, the fixed table top 11 has a receiving cavity 113 therein, which is communicated with the receiving opening 111; the crash table further comprises a cover assembly 40, a traction assembly 50 and a retractor 60; the covering component 40 is positioned in the accommodating cavity 113; the traction component 50 is connected with the bidirectional screw 21 or the unidirectional screw 25 and is connected with the covering component 40; the retracting piece 60 is respectively connected with the covering component 40 and the table body 10; when the lifting component 20 drives the lifting table panel 12 to move into the table body 10 from the accommodating port 111 along the height direction of the table body 10, the traction component 50 draws the covering component 40 to slide out of the accommodating cavity 113 and cover the accommodating port 111; when the lifting assembly 20 drives the lifting table panel 12 to move out of the table body 10 from the receiving opening 111 along the height direction of the table body 10, the retracting member 60 pulls the covering assembly 40 to slide into the accommodating cavity 113.

When the side of the lifting table top 12 away from the supporting member 23 is flush with the side of the fixed table top 11 away from the supporting member 23, the accommodating cavity 113 is used to accommodate the covering component 40, in the embodiment of the present application, the specific shape, the size, and the like of the accommodating cavity 113 are not limited, as long as the accommodating cavity 113 can accommodate the covering component 40.

Along the height direction of the table body 10, when the side of the lifting table top panel 12 away from the supporting member 23 is flush with the side of the fixed table top panel 11 away from the supporting member 23, the covering assembly 40 is located in the accommodating cavity 113; when the lifting component 20 drives the lifting table panel 12 to move into the table body 10 from the accommodating port 111 along the height direction of the table body 10, the traction component 50 drives the covering component 40 to move out of the accommodating cavity 113 and cover the accommodating port 111, so that the articles on the lifting table panel 12 are accommodated into the table body 10 to form a closed space, and the articles accommodated into the table body 10 are prevented from being overturned out of the table body 10 through the accommodating port 111; when the lifting component 20 drives the lifting table top panel 12 to move out of the table body 10 from the storage opening 111 along the height direction of the table body 10, the retracting component 60 drives the covering component 40 to move into the accommodating cavity 113 and retract into the accommodating cavity 113, so that the lifting table top panel 12 can move out of the table body 10 and the top surface of the lifting table top panel 12 is flush with the top surface of the fixed table top panel 11.

Referring to fig. 2, 5 and 6, in some embodiments of the present application, the fixed table top 11 is provided with a sliding groove 112 at two side edges of the receiving opening 111 adjacent to the accommodating cavity 113; the shockproof table further comprises a connecting piece 412, wherein the connecting piece 412 is arranged at the two side edges of the covering assembly 40 adjacent to the accommodating cavity 113, far away from the bottom wall end of the accommodating cavity 113, and is positioned in the sliding groove 112; traction assembly 50 includes one or more wire winding members 51, one or more pull wires 52, and one or more reversing members 53; one or more wire winding members 51 are fixedly sleeved on any two-way threaded rod or any one-way threaded rod; part of the pull wire 52 is positioned in the sliding groove 112, and one end of the pull wire is fixedly connected with the connecting piece 412, and the other end of the pull wire is fixedly connected with the winding piece 51; one or more reversing members 53 are rotatably connected to the table body 10, and a part of the pulling wire 52 is wound on the reversing members 53.

The winding member 51 rotates with the two-way screw 21 or the one-way screw 25 to wind the wire 52 around the winding member 51, and in some embodiments of the present application, the winding member 51 is provided as a reel.

The cord 52, as it is wound onto the reel, moves the cover assembly 40 out of the receiving cavity 113 and closes the receiving opening 111, and therefore the cord 52 should have good flexibility, tensile strength and wear resistance, and therefore, in some embodiments of the present application, the cord 52 is a PE cord.

The direction reverser 53 requires a direction reverser 53 to reverse the direction of the pull wire 52, since the pull wire 52 is fixedly connected to the cover assembly 40 at one end and to the reel at the other end, and since the reel is located below the cover assembly 40, in some embodiments of the present application, the direction reverser 53 is provided as a direction reversing wheel; in some embodiments of the present application, the table top 10 is provided with a cavity communicating with the sliding groove 112, the direction-changing member 53 is located in the cavity, and the cavity is located at one end of the sliding groove 112 far away from the accommodating cavity, if the size of the direction-changing member is too large, the cavity can be simultaneously provided on the table body 10 and the table top 11.

The sliding groove 112 is adapted to the connecting member 412 to guide the covering assembly 40, and the pulling wire 52 is located in the sliding groove 112 to prevent the pulling wire 52 from affecting the table top board 12 along the height direction of the table body 10.

In order to prevent the guy 52 from affecting the movement of the table top 12 out of the receiving opening 111 or into the table body 10, after the guy 52 is disposed in the sliding groove 112, the covering member 40 needs to partially extend into the sliding groove 112 to achieve a fixed connection with the guy 52, and therefore, the connecting member 412 fixedly connected with the covering member 40 is disposed to achieve a fixed connection between the guy 52 and the covering member 40.

When the bidirectional screw 21 rotates to drive the lifting table top panel 12 to move from the storage opening 111 to the table body 10 along the height direction of the table body 10, the rotating bidirectional screw 21 drives the winding member 51 sleeved on the bidirectional screw to rotate synchronously, and because one end of the pull wire 52 is fixedly connected with the covering component 40 and the other end of the pull wire 52 is fixedly connected with the winding member 51, the pull wire 52 is gradually wound on the winding member 51 along with the rotation of the winding member 51, the covering component 40 fixedly connected with the other end of the pull wire 52 is pulled out of the storage cavity 113 by the pull wire 52, and because part of the pull wire 52 is in the sliding groove 112, the pull wire 52 pulls the covering component 40 to move away from the bottom wall of the storage cavity 113 along the length direction of the sliding groove 112 and finally cover the storage opening 111; because the two-way screw 21 is under the fixed table top 11 and the pulling wire 52 is in the sliding groove 112 on the fixed table top 11, the pulling wire 52 is wound on the reversing member 53, and thus the reversing member 53 reverses the pulling wire 52; in addition, since the pulling wire 52 is disposed in the moving slot, the pulling wire 52 does not interfere with the movement of the table top 12 from the receiving opening 111 to the table body 10.

Similarly, the one-way screw 25 can be matched with the winding element 51, the pull wire 52 and the reversing element 53 to achieve the same effect.

Referring to fig. 6, in some embodiments of the present application, the pulling assembly 50 further includes a torsion spring 54, the torsion spring 54 is fixedly secured to the two-way threaded member 21 or the one-way threaded member 25, and the inner end of the torsion spring 54 is fixedly connected to the two-way threaded member 21 or the one-way threaded member 25, and the other end of the torsion spring is fixedly connected to the winding member 51.

When the bidirectional screw 21 rotates to drive the lifting desk panel 12 to move from the storage opening 111 to the desk body 10 along the height direction of the desk body 10, the rotating bidirectional screw 21 firstly deforms the torsion spring 54, and the lifting desk panel 12 descends a certain distance along the height direction of the desk body 10 within this period of time, that is, the articles on the lifting desk panel 12 are stored in the desk body 10, thereby preventing the articles on the lifting desk panel 12 from influencing the covering of the covering component 40 by the storage opening 111, after the torsion spring 54 is completely deformed, the rotating bidirectional screw 21 can drive the winding component 51 sleeved on the bidirectional screw to rotate synchronously and wind the pull wire 52 onto the winding component 51, and the covering of the covering component 40 on the storage opening 111 is realized.

In addition, when the torsion spring 54 is not provided, a large pulling force is applied to the wire 52 by the sudden start of the driving member 24, and after the torsion spring 54 is provided, the force applied to the wire 52 by the sudden start of the driving member 24 is absorbed by the torsion spring 54, so that the wire 52 is protected, and the service life of the wire 52 is prolonged.

Likewise, the one-way threaded member 25 may also serve the same function in conjunction with the torsion spring 54 described above.

Referring to fig. 5, in some embodiments of the present application, the covering assembly 40 includes a plurality of folding members 41, and adjacent folding members 41 are hinged to each other; wherein the folding member 41 far from the bottom wall of the accommodating cavity 113 is fixedly connected with the pulling wire 52.

In some embodiments of the present application, the folding members 41 are provided as folding pieces, and the hinge connection between adjacent folding pieces may be implemented by hinges or the like.

After the covering assembly 40 is formed by hinging a plurality of folding members 41, the folding members 41 can be folded to reduce the volume of the covering assembly 40, i.e., the space occupied by the accommodating cavity 113 for fixing the table top 11.

Referring to fig. 5, in some embodiments, each of the folding members 41 is provided with a through hole 411, the retracting member 60 is configured as an elastic retracting wire, the elastic retracting wire penetrates through the through hole 411 of each of the folding members 41, one end of the elastic retracting wire is fixedly connected to the folding member 41 far away from the bottom wall of the accommodating cavity 113, and the other end of the elastic retracting wire is fixedly connected to the bottom wall of the accommodating cavity 113, when the covering assembly 40 covers the accommodating opening 111, the elastic force of the elastic retracting wire is greater than that of the torsion spring 54.

The insertion holes 411 are used for passing the elastic retractive wire, and in order to reduce the length of the elastic retractive wire and the friction between the elastic retractive wire and the folding members 41, in some embodiments of the present application, the axes of the insertion holes 411 of each folding member 41 are overlapped with each other when a plurality of folding members 41 are stacked.

When the two-way screw 21 rotates to drive the lifting table top panel 12 to move towards the receiving opening 111 along the height direction of the table body 10, the pulling wire 52 is gradually released from the winding member 51 along with the rotation of the two-way screw 21, and because the elastic pulling wire is fixedly connected with the folding member 41 farthest from the bottom wall of the accommodating cavity 113, then, as the pulling wire 52 is gradually released from the winding member 51, the elastic pulling wire gradually drives the folding member 41 farthest from the bottom wall of the accommodating cavity 113 to start moving towards the bottom wall of the accommodating cavity 113 due to the elasticity of the elastic pulling wire, and the covering component 40 starts to be retracted into the accommodating cavity 113; with the continuous rotation of the bidirectional screw 21, the folding piece 41 which is farthest from the bottom wall of the accommodating cavity 113 is drawn by the elastic back-drawing line to be closer to the bottom wall of the accommodating cavity 113, the area of the accommodating opening 111 covered by the covering component 40 is smaller and smaller, and because the two adjacent folding pieces 41 are hinged, in the process, the folding pieces 41 are gradually stacked together; finally, the elastic back-drawing line draws the folding member 41 farthest from the bottom wall of the containing cavity 113 into the containing cavity 113, at this time, the folding members 41 can be completely stacked together, and along the height direction of the table body 10, the side of the lifting table panel 12 away from the two-way screw 21 can be flush with the side of the fixed table panel 11 away from the two-way screw 21, if at this time, the folding members 41 cannot be completely stacked together, the side of the lifting table panel 12 away from the two-way screw 21 cannot be flush with the side of the fixed table panel 11 away from the two-way screw 21, but as the elastic drawing line continues to draw the folding member 41 farthest from the bottom wall of the containing cavity 113 toward the bottom wall of the containing cavity 113, the folding members 41 will be completely stacked together, and along the height direction of the table body 10, the side of the lifting table panel 12 away from the two-way screw 21 will be flush with the side of the fixed table panel 11 away from the two-way screw 21, the examples of the present application are not limited thereto.

Meanwhile, when the covering component 40 covers the accommodating opening 111, the elastic force of the elastic retracing line is greater than that of the torsion spring 54, and when the bidirectional threaded piece 21 starts to rotate, the elastic retracing line starts to drive the covering component 40 to move towards the accommodating cavity 113 along the length direction of the sliding groove 112 without waiting for the torsion spring 54 to unload; when the bidirectional screw 21 rotates to drive the lifting table panel 12 to move from the storage opening 111 to the table body 10 along the height direction of the table body 10, because the elastic force of the elastic retraction wire is greater than the elastic force of the torsion spring 54, it can still be ensured that the lifting table panel 12 has descended a certain distance along the height direction of the table body 10, the torsion spring 54 completes complete deformation, and at this time, the pull wire 52 can pull the covering component 40 to slide along the length direction of the sliding groove 112 and cover the storage opening 111.

Since the covering assembly 40 includes a plurality of folding members 41, when the pulling wire 52 pulls the covering assembly 40, the pulling wire 52 pulls the folding member 41 farthest from the bottom wall of the accommodating cavity 113 away from the bottom wall of the accommodating cavity 113, and as the pulling wire 52 is gradually wound around the winding member 51, the folding member 41 farthest from the bottom wall of the accommodating cavity 113 is first pulled out of the accommodating cavity 113, and then the remaining folding members 41 are gradually pulled out of the accommodating cavity 113, and as the adjacent folding members 41 are hinged to each other, the folding members 41 stacked together gradually unfold.

Referring to fig. 4 and 7, in some embodiments of the present application, a sliding hole 13 is formed on a side of the table body 10 away from the fixed table top 11; the anti-vibration table further comprises a sliding assembly 70 and a shock absorbing member 80; one end of the sliding component 70 penetrates into the sliding hole 13 and is slidably connected with the table body 10, and the other end penetrates through the outer side of the sliding hole 13; the shock absorber 80 is located in the slide hole 13, and has one end abutting against the bottom wall of the slide hole 13 and one end abutting against the end of the slide assembly 70 located in the slide hole 13.

The type, shape and the like of the shock absorbing member 80 are not limited in the embodiments of the present application, as long as the elasticity of the shock absorbing member 80 can absorb the shock of the table body 10, and the size of the shock absorbing member 80 can be accommodated in the sliding hole 13, in some embodiments of the present application, the shock absorbing member 80 may be a spring; in other embodiments of the present application, the shock absorbing member 80 may be a shock absorbing rubber.

When the ship body bumps, the up-and-down movement of the ship body is transmitted to the sliding component 70, so that the sliding component 70 slides in the sliding hole 13 along the axial direction of the sliding hole 13, however, since the shock absorbing member 80 is arranged between the sliding component 70 and the bottom wall of the sliding hole 13, the shock absorbing member 80 converts the kinetic energy of the sliding component 70 into elastic potential energy, and the desk body 10 is damped.

Referring to fig. 4 and 7, in some embodiments of the present application, the triggering module 30 includes a triggering member 31 and a triggering element 32; the trigger 31 is fixedly connected with one end of the sliding component 70 in the sliding hole 13; the trigger element 32 is positioned in the sliding hole 13 and fixedly connected with the bottom wall of the sliding hole 13, and the trigger element 32 is electrically connected with the driving piece 24; wherein, as the shock absorbing member 80 gradually shrinks, the triggering member 31 gradually approaches the triggering element 32 and can abut against the triggering element 32.

The specific type of the trigger element 32 is not limited in the embodiments of the present application, in some embodiments of the present application, the trigger element 32 may be a pressure sensor, and in other embodiments of the present application, the trigger element 32 may be a displacement sensor; for example, the trigger element 32 may be configured as a pressure sensor as long as the trigger element 32 can detect that the trigger 31 contacts the trigger element 32, and when the shock absorber 80 is compressed to the maximum compression length, the trigger 31 just can contact the trigger element 32; when the shock absorbing member 80 has not been compressed to the maximum compressed length and the trigger member 31 has contacted the trigger member 32, the trigger member 32 may be configured as a displacement sensor.

The trigger 31 is used for triggering the trigger element 32, the shape of the trigger 31 is not specifically limited in the embodiment of the present application, but since the trigger 31 needs to abut against the trigger element 32, in order to prevent the trigger 31 from damaging the trigger element 32 due to too violent vessel pitching, in some embodiments of the present application, the trigger element 32 is made of rubber, so that the trigger 31 can apply pressure to the trigger element 32 to trigger the trigger element 32, and also can deform to reduce the force applied to the trigger element 32 by the trigger 31 when the vessel is too violent in pitching, thereby improving the reliability of the earthquake-proof table.

The ship body is bumped too violently, so that the shock absorbing member 80 is compressed until the triggering member 31 abuts against the triggering member 32, at this time, because the triggering member 32 is triggered by the triggering member 31, the triggering member 32 sends a signal to the driving member 24, the driving member 24 starts to drive the two-way screw member 21 or the one-way screw member 25 to start rotating, the lifting table panel 12 is retracted into the table body 10 from the storage opening 111, and the objects placed on the lifting table panel 12 are stored.

Referring to fig. 4 and 7, in some embodiments of the present application, the table body 10 further includes a limiting ring 90, and the limiting ring 90 is fixedly connected to the table body 10 at an opening edge of the sliding hole 13 on the table body 10; the sliding assembly 70 comprises a stop block 71 and a sliding rod 72; the limiting block 71 is positioned in the sliding hole 13 and is connected with the table body 10 in a sliding manner; one end of the sliding rod 72 penetrates through the inner ring of the limiting ring 90 and is fixedly connected with the limiting block 71, and the other end of the sliding rod is positioned outside the sliding hole 13; wherein, the limiting block 71 and/or the sliding rod 72 are/is connected with the table body 10 in a sliding manner, and the orthographic projection of the limiting block 71 on the limiting ring 90 at least coincides with part of the limiting ring 90.

The limiting ring 90 is used for limiting the sliding assembly 70 from falling out of the sliding hole 13, and the shape of the inner ring of the limiting ring 90 is not limited in the embodiment of the present application, for example, circular, square or triangular, and it should be noted that, when the sliding rod 72 and the limiting ring 90 are slidably fitted, the shape of the sliding rod 72 and the shape of the inner ring of the limiting ring 90 should be the same, and a clearance fit is adopted between the two; when the sliding rod 72 and the inner ring of the retainer ring 90 are not in contact, the shape of the sliding rod 72 and the inner ring of the retainer ring 90 may naturally be different.

The limiting ring 90 is matched with the limiting ring 90 to prevent the sliding assembly 70 from falling out of the sliding hole 13, therefore, the orthographic projection of the limiting block 71 on the limiting ring 90 at least coincides with a part of the limiting ring 90, and it should be noted that, when the limiting block 71 is matched with the side wall of the sliding hole 13 in a sliding manner, the shape of the limiting block 71 is the same as that of the sliding hole 13, and the two are in clearance fit.

In order to prevent the sliding assembly 70 from completely penetrating into the sliding hole 13, in some embodiments of the present application, a foot pad is fixedly connected to an end of the sliding rod 72 away from the limiting block 71, and an orthographic projection of the foot pad on the limiting ring 90 at least coincides with a portion of the limiting ring 90 along the height direction of the table body 10.

The limiting block 71 and/or the sliding rod 72 in the sliding assembly 70 are/is slidably connected with the table body 10 through the sliding hole 13, and in order to prevent the sliding assembly 70 from coming off the sliding hole 13, the orthographic projection of the limiting block 71 on the limiting ring 90 at least coincides with part of the limiting ring 90, so that the sliding assembly 70 is ensured not to come off the sliding hole 13.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. .

Claims

1. A marine earthquake-proof table, comprising:

a table body;

a lifting table panel;

the trigger module is electrically connected with the lifting assembly;

when the trigger module is triggered, the lifting component drives the lifting table panel to move into the table body from the storage opening along the height direction of the table body;

the lifting assembly comprises:

one or more bi-directional screws rotatably coupled to the table body;

One or more one-way screws rotatably connected to the table body;

each one-way threaded part is in threaded connection with at least one axial moving part, the supporting parts are arranged in parallel, and the lifting table panel is in sliding connection with the guide part;

an accommodating cavity communicated with the accommodating port is formed in the fixed desktop plate; the shockproof table further comprises:

the covering component is positioned in the accommodating cavity;

the traction assembly is connected with the bidirectional threaded piece or the unidirectional threaded piece and is connected with the covering assembly;

2. The marine earthquake-proof table as defined in claim 1, wherein the fixed table top board is provided with sliding grooves at two side edges of the receiving opening adjacent to the containing cavity; the shockproof table further comprises:

the connecting piece is arranged at the end, far away from the bottom wall of the accommodating cavity, of the two adjacent side edges of the covering assembly and the accommodating cavity and is positioned in the sliding groove; the tow assembly includes:

3. A marine seismic table, as defined in claim 2, wherein said traction assembly further comprises:

4. A marine seismic table as in claim 2, wherein said cover assembly comprises a plurality of folding members, adjacent said folding members being hingedly connected to one another;

wherein the connecting piece is fixedly connected with the folding piece farthest from the bottom wall of the accommodating cavity.

5. The marine earthquake-proof table as claimed in claim 4, wherein each of the folding members is provided with a through hole, the retraction member is configured as an elastic retraction wire, the elastic retraction wire penetrates through the through hole of each of the folding members, one end of the elastic retraction wire is fixedly connected with the folding member farthest from the bottom wall of the accommodating cavity, and the other end of the elastic retraction wire is fixedly connected with the bottom wall of the accommodating cavity.

6. The marine earthquake-proof table as claimed in claim 1, wherein a sliding hole is formed at one side of the table body away from the fixed table top plate; the shockproof table further comprises:

one end of the sliding component penetrates through the sliding hole and is connected with the table body in a sliding manner, and the other end of the sliding component penetrates through the opening of the sliding hole in the table body and is positioned outside the sliding hole;

and the damping piece is positioned in the sliding hole, one end of the damping piece is abutted to the bottom wall of the sliding hole, and the other end of the damping piece is abutted to one end of the sliding assembly in the sliding hole.

7. Marine shock table according to claim 6, wherein said triggering module comprises:

8. Marine shock table as defined in claim 6, wherein said table body further comprises: the limiting ring is fixedly connected with the table body at the opening edge of the sliding hole on the table body;

the sliding assembly includes:

the limiting block is positioned in the sliding hole;

one end of the sliding rod penetrates through the inner ring of the limiting ring to be fixedly connected with the limiting block, and the other end of the sliding rod is positioned outside the sliding hole;

the limiting block and/or the sliding rod are/is in sliding connection with the table body, and the orthographic projection of the limiting block on the limiting ring is at least overlapped with part of the limiting ring.