CN114060401A

CN114060401A - Screen rotating shaft

Info

Publication number: CN114060401A
Application number: CN202111351617.4A
Authority: CN
Inventors: 王士忠; 丛承瑶
Original assignee: Qingdao Belay Culture Technology Co ltd
Current assignee: Qingdao Belay Culture Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-02-18
Anticipated expiration: 2041-11-16
Also published as: CN114060401B

Abstract

The invention discloses a screen rotating shaft, which adopts the technical scheme that the screen rotating shaft comprises two rotating plates, and relates to a screen, wherein the two rotating plates are respectively and fixedly connected to two adjacent screen plates and are vertically stacked together; the sleeve is fixedly connected to the top of the rotating plate positioned at the top; the rotating shaft is fixedly connected to the rotating plate positioned at the bottom, penetrates through the rotating plate positioned at the top upwards and extends into the sleeve, and a limiting groove is formed in the top of the rotating shaft; the limiting rod is arranged in the sleeve and can slide up and down, and when the limiting rod is inserted into the limiting groove, the rotating shaft cannot rotate in the sleeve; the adjusting mechanism is used for adjusting the up-and-down movement of the limiting rod; through the arrangement of the limiting rod, when the rotation is not needed, the adjacent two screen plates can not freely rotate, so that the shape of the screen can not be damaged under the action of external force.

Description

Screen rotating shaft

Technical Field

The invention relates to a screen, in particular to a screen rotating shaft.

Background

The screen is a piece of furniture for shielding wind in the traditional Chinese building, and the screen is used as an important component of the traditional furniture and has been used for a long time in history; the screen is generally arranged at a remarkable position in a room, plays roles of separation, beautification, wind shielding, coordination and the like, and is an inseparable part of Chinese home decoration.

The folding screen is one of screens, and comprises a plurality of screen plates, two adjacent screen plates are hinged together, and the two screen plates can rotate around a vertical axis, but the two adjacent screen plates can freely rotate, so that when the external force is applied, the two adjacent screen plates can easily rotate mutually, and the shape of the screen at the moment is damaged.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a screen rotating shaft, which can prevent two adjacent screen plates from freely rotating when the screen rotating shaft does not need to rotate through the arrangement of a limiting rod, so that the shape of a screen can not be damaged under the action of external force.

In order to achieve the purpose, the invention provides the following technical scheme: a screen rotating shaft comprises two rotating plates, wherein the two rotating plates are respectively and fixedly connected to two adjacent screen plates and are vertically stacked together;

the sleeve is fixedly connected to the top of the rotating plate positioned at the top;

the rotating shaft is fixedly connected to the rotating plate positioned at the bottom, penetrates through the rotating plate positioned at the top upwards and extends into the sleeve, and a limiting groove is formed in the top of the rotating shaft;

the limiting rod is arranged in the sleeve and can slide up and down, and when the limiting rod is inserted into the limiting groove, the rotating shaft cannot rotate in the sleeve;

and the adjusting mechanism is used for adjusting the up-and-down movement of the limiting rod.

By adopting the technical scheme, when the limiting rod is inserted into the limiting groove, the two rotating plates cannot rotate mutually, and when the limiting rod is separated from the limiting groove, the two rotating plates can rotate freely; through the arrangement of the limiting rod, when the rotation is not needed, the adjacent two screen plates can not freely rotate, so that the shape of the screen can not be damaged under the action of external force.

The invention is further configured to: the adjusting mechanism comprises a lifting piece which is fixedly connected to the top of the adjusting rod and is used for driving the adjusting rod to slide up and down;

the elastic piece is used for pushing the lifting piece to slide upwards;

a telescopic rod which is arranged in the lifting piece and can slide in the lifting piece along the horizontal direction;

the stop piece is fixed on the inner wall of the sleeve, when one end of the telescopic rod extends out of the lifting piece and abuts against the bottom of the stop piece, the limiting rod is inserted into the limiting groove, and when the telescopic rod is positioned above the stop piece, the limiting rod is separated from the limiting groove;

and the pressing component is used for pushing the telescopic rod to retract into the lifting piece.

Through adopting above-mentioned technical scheme, through the cooperation that presses subassembly, telescopic link and stop, can all insert and extract the spacing groove and adjust by the gag lever post.

The invention is further configured to: the telescopic link is provided with two, and two telescopic links set up for the axis of rotation symmetry of axis of rotation, and two telescopic links can support tightly in the bottom of blockking when stretching out the lift piece simultaneously, and the slip direction of two telescopic links is located same horizontal straight line.

Through adopting above-mentioned technical scheme, through setting up two telescopic links for when the gag lever post inserts the spacing groove, through two telescopic links and the interact between the piece that stops, the state that keeps the gag lever post to insert in the spacing groove that can be more stable.

The invention is further configured to: a guide rod is arranged below the telescopic rod, can slide on the lifting piece and has the same sliding direction as the telescopic rod above the guide rod;

the guide rods are connected with the telescopic rods above the guide rods through connecting rods located in the lifting piece, the pressing assembly comprises two pressing rods, when the telescopic rods abut against the lower portion of the blocking piece tightly, one ends, close to each other, of the two pressing rods abut against one ends, far away from each other, of the two guide rods respectively, and the two pressing rods can push the two guide rods to slide in opposite directions.

Through adopting above-mentioned technical scheme, through setting up the guide bar for the effect of two guide bars can be transmitted to two telescopic links on, thereby make shrink to the lift piece in that two telescopic links can be smooth, thereby make the gag lever post can upwards slide smoothly under the effect of elastic component.

The invention is further configured to: at least one elastic part is arranged between the two connecting rods and used for pushing the two connecting rods to slide towards the direction away from each other.

Through adopting above-mentioned technical scheme, through setting up the elastic component for under the condition of no exogenic action, the one end that two telescopic links deviate from each other can keep stretching out the state of piece.

The invention is further configured to: the end of each telescopic rod, which is far away from each other, is provided with an inclined surface, and the bottoms of the two inclined surfaces incline towards the direction of mutual approaching;

the positions of the blocking pieces, which are close to the two telescopic rods, are provided with inclined planes, and the tops of the inclined planes incline towards the direction close to the side wall of the sleeve.

Through adopting above-mentioned technical scheme, through set up the inclined plane on telescopic link and blocking piece for when the telescopic link is located and blocks piece top, only need press down the lift piece, under the inclined plane effect on telescopic link and blocking piece, two telescopic links just can contract in the lift piece, make the removal that two telescopic links can be smooth to block the piece below.

The invention is further configured to: the bottom of the rotating shaft is fixedly connected with a positioning plate, through holes penetrating through the rotating plates along the vertical direction are formed in the two rotating plates, the rotating shaft penetrates through the through holes in the two rotating plates along the vertical direction, a positioning groove is formed in the bottom of the rotating plate positioned at the bottom, the positioning plate can be embedded into the positioning groove, and the cross sections of the positioning plate and the positioning groove are polygons;

the sleeve is internally provided with a propping piece which has elasticity and applies upward elasticity to the rotating shaft.

The invention is further configured to: the outer side of the rotating shaft is in threaded connection with a limiting ring, and the elastic force of the abutting piece acts on the bottom of the limiting ring.

The invention is further configured to: one side that two rotor plates are close to each other all fixedly connected with a plurality of arc archs of arranging around the axis of rotation, between two adjacent archs on another rotor plate can both be embedded into to arbitrary arc arch.

The invention is further configured to: the sleeve is fixedly connected with two guide tubes penetrating through the side wall of the sleeve, the two guide tubes are respectively sleeved outside the two press rods, reset pieces are arranged in the guide tubes, the reset pieces have elasticity, and when the reset pieces are in a normal state, one ends of the press rods extend out of the sleeve.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the arrangement of the limiting rod, when the rotation is not needed, the adjacent two screen plates cannot freely rotate, so that the shape of the screen cannot be damaged under the action of external force;

2. according to the invention, through the matching of the pressing component, the telescopic rod and the blocking piece, the limiting rod can be inserted into and pulled out of the limiting groove for adjustment;

3. according to the invention, by arranging the elastic piece, under the condition of no external force, one end of each of the two telescopic rods, which is deviated from each other, can keep a state of extending out of the lifting piece;

4. according to the invention, the inclined planes are arranged on the telescopic rod and the blocking piece, so that when the telescopic rod is positioned above the blocking piece, only the lifting piece needs to be pressed downwards, and the two telescopic rods can be contracted into the lifting piece under the action of the inclined planes on the telescopic rod and the blocking piece, so that the two telescopic rods can smoothly move to the position below the blocking piece;

5. according to the invention, the guide rods are arranged, so that the functions of the two guide rods can be transferred to the two telescopic rods, the two telescopic rods can be smoothly contracted into the lifting piece, and the limiting rod can smoothly slide upwards under the action of the elastic piece.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a sectional view of the overall structure of the embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of the portion B of FIG. 2;

FIG. 5 is a diagram illustrating a bump structure according to an embodiment.

In the figure: 1. a rotating plate; 11. a through hole; 12. positioning a groove; 13. a protrusion; 2. a rotating shaft; 21. a limiting groove; 22. a limiting ring; 23. positioning a plate; 3. a sleeve; 31. a blocking member; 4. a limiting rod; 5. a lifting member; 51. a connecting cylinder; 52. a lifting cylinder; 53. a lifting cap; 6. a connecting rod; 61. a telescopic rod; 62. a guide rod; 63. an elastic member; 7. an elastic member; 8. a pressing assembly; 81. a pressing lever; 82. a guide tube; 83. pressing the cap; 84. a reset member; 85. a blocking ring; 9. fixing a sleeve; 91. a connecting ring; 92. an abutting piece; 10. a connecting plate.

Detailed Description

In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.

The invention is further described with reference to the drawings and the preferred embodiments.

Example (b): a screen rotating shaft, see attached figures 1-5, comprises two rotating plates 1 which are horizontally arranged and stacked together, a sleeve 3 which is fixedly connected with the top of the rotating plate 1 positioned at the top, a rotating shaft 2 which is fixedly connected with the rotating plate 1 positioned at the bottom and upwards penetrates through the rotating plate 1 positioned at the top to extend into the sleeve 3, a limiting rod 4 which is arranged in the sleeve 3 and can slide up and down, and an adjusting mechanism for adjusting the limiting rod 4 to move up and down. Specifically, two rotor plates 1 respectively with adjacent two screen wind board fixed connection together, a spacing groove 21 has been seted up at the top of axis of rotation 2 to the vertical setting of axis of rotation 2, when the bottom one end of gag lever post 4 inserted in the middle of the spacing groove 21, axis of rotation 2 can't be at 3 internal rotations of sleeve to make and can't carry out relative rotation between two rotor plates 1, thereby make and the adjacent two screen wind board that are connected with two rotor plates 1 can't rotate relatively.

Through the arrangement of the limiting rod 4, when the rotation is not needed, the adjacent two screen plates can not freely rotate, and the shape of the screen can not be damaged under the action of external force.

Specifically, the cross sections of the limiting rod 4 and the limiting groove 21 are both polygonal, so that when the limiting groove 21 is inserted into the limiting rod 4, the limiting rod 4 and the rotating shaft 2 cannot rotate relatively; specifically, the sleeve 3 is a cylinder coaxially arranged with the rotating shaft 2, and the top of the sleeve 3 is arranged in an open manner; specifically, the adjusting mechanism comprises a lifting piece 5 which is positioned in the sleeve 3 and fixedly connected to the top of the adjusting rod, an elastic piece 7 which is arranged on the rotating shaft 2 and used for pushing the lifting piece 5 to slide upwards, a telescopic rod 61 which is arranged on the lifting piece 5 and can slide on the lifting piece 5 in the horizontal direction, a blocking piece 31 which is fixed on the inner wall of the sleeve 3, and a pressing assembly 8 which is used for pushing the telescopic rod 61 to retract into the lifting piece 5; when one end of the telescopic rod 61 extends out of the lifting piece 5 and abuts against the bottom of the blocking piece 31, the limiting rod 4 is inserted into the limiting groove 21, and when the telescopic rod 61 is located above the blocking piece 31, the limiting rod 4 is separated from the limiting groove 21.

Specifically, two telescopic rods 61 are arranged, the two telescopic rods 61 are symmetrically arranged relative to the rotating shaft 2 of the rotating shaft 2, the two telescopic rods 61 can be tightly abutted against the bottom of the blocking piece 31 when extending out of the lifting piece 5, and the sliding directions of the two telescopic rods 61 are positioned on the same horizontal straight line; specifically, the blocking member 31 is configured as a circular ring coaxial with the sleeve 3, so that the ends of the two telescopic rods 61 extending out of the lifting member 5 can simultaneously abut against the bottom of the blocking member 31. Specifically, an inclined plane is arranged at one end of each of the two telescopic rods 61, which is away from each other, and the bottoms of the two inclined planes incline towards the direction of mutual approaching; the blocking piece 31 is provided with an inclined plane at the position close to the two telescopic rods 61, and the top of the inclined plane inclines towards the direction close to the side wall of the sleeve 3; when the two telescopic rods 61 are in a downward process under the action of the lifting piece 5, the inclined surfaces on the telescopic rods 61 can be attached to the inclined surfaces on the blocking piece 31.

When the ends of the two telescopic rods 61, which are away from each other, extend out of the lifting piece 5 and are tightly abutted against the bottom of the blocking piece 31, the limiting rod 4 is inserted into the limiting groove 21, and the two rotating plates 1 cannot rotate relatively; when the two rotating plates 1 need to be rotated, the two pressing assemblies 8 push the ends of the two telescopic rods 61 which deviate from each other to slide in opposite directions, so that the two telescopic rods 61 gradually retract into the lifting piece 5, when the two telescopic rods 61 can pass through the blocking piece 31, under the action of the elastic piece 7, the lifting piece 5 slides upwards and drives the limiting rod 4 to slide upwards, so that the limiting rod 4 is separated from the limiting groove 21, so that the two rotating plates 1 can rotate relatively, after the two rotating plates 1 rotate in place, the lifting piece 5 is pressed downwards, in the process of pressing downwards, the inclined surface on the telescopic rod 61 is attached to the inclined surface on the blocking piece 31, under the action of the two inclined surfaces, the two telescopic rods 61 are driven to slide towards the directions close to each other, so that the two telescopic rods 61 can pass through the blocking piece 31, and when the telescopic rods 61 slide to the bottom of the blocking piece 31 under the driving of the lifting piece 5, one end of the two telescopic rods 61, which is away from each other, extends out of the lifting piece 5 and abuts against the bottom of the blocking piece 31, and at the moment, the limiting rod 4 is inserted into the limiting groove 21.

Specifically, the length direction of the telescopic rod 61 is arranged along the radial direction of the rotating shaft 2, the telescopic rod 61 slides on the lifting piece 5 along the length direction of the telescopic rod, and the two telescopic rods 61 are positioned on the same straight line; specifically, a guide rod 62 capable of sliding on the lifting member 5 is arranged below each telescopic rod 61, the length direction of the guide rod 62 is parallel to the length direction of the telescopic rod 61, and the guide rod 62 can slide on the lifting member 5 along the length direction thereof. A connecting rod 6 vertically arranged is arranged between the guide rod 62 and the telescopic rod 61 right above the guide rod, and one end of the top and one end of the bottom of the connecting rod 6 are fixedly connected with one end of the telescopic rod 61 extending into the lifting piece 5 and one end of the guide rod 62 extending into the lifting piece 5 respectively. When the ends of the two telescopic rods 61 that are away from each other extend out of the lifting member 5 and abut against the bottom of the blocking member 31, the two pressing assemblies 8 respectively contact the ends of the two guiding rods 62 that are away from each other and can push the two guiding rods 62 to slide toward the directions that are close to each other.

Specifically, the lifting piece 5 comprises a connecting cylinder 51 fixedly connected to the top of the limiting rod 4 and having a vertical axis, and a lifting cylinder 52 fixedly connected to the top of the connecting cylinder 51 and coaxially arranged with the connecting cylinder 51, wherein the connecting cylinder 51 is coaxially arranged with the rotating shaft 2; the area of the bottom of the connecting cylinder 51 is larger than that of the top of the limiting rod 4; the elastic piece 7 is a spring which is sleeved outside the limiting rod 4, and the top of the spring is tightly propped against the bottom of the connecting cylinder 51; specifically, the diameter of the connecting cylinder 51 is smaller than that of the lifting cylinder 52; the two telescopic rods 61 are arranged on the lifting cylinder 52 and penetrate through the side wall of the lifting cylinder 52, the two guide rods 62 are arranged on the connecting cylinder 51 and penetrate through the side wall of the connecting rod, and the two connecting rods 6 are positioned in the lifting cylinder 52 and the connecting cylinder 51.

Specifically, at least one elastic member 63 is arranged on one side of the two connecting rods 6 close to each other, and the elastic member 63 is used for pushing the two connecting rods 6 to slide towards the direction away from each other, so that when the telescopic rod 61 slides to the bottom of the blocking member 31, the telescopic rod can slide towards the direction away from each other under the action of the elastic member 63; specifically, the elastic member 63 is provided as a spring, and two springs are provided on the side where the two links 6 are close to each other, and are arranged in the vertical direction.

Specifically, the top of the lifting cylinder 52 is provided with a lifting cap 53 fixed on the outer side of the lifting cylinder 52.

Specifically, the pressing assembly 8 includes two pressing rods 81, the length direction of the two pressing rods 81 is parallel to the length direction of the guide rod 62, the two pressing rods 81 are symmetrically arranged with respect to the axis of the sleeve 3, and the two pressing rods 81 penetrate through the side wall of the sleeve 3 along the length direction thereof and can slide on the sleeve 3 along the length direction thereof; when the telescopic rod 61 abuts against the lower part of the blocking member 31, the ends of the two pressing rods 81 close to each other abut against the ends of the two guiding rods 62 away from each other, and at this time, by pressing the two pressing rods 81 to slide toward the direction of closing to each other, the two guiding rods 62 can be pushed by the pressing rods 81 to slide toward the direction of closing to each other.

Specifically, two guide tubes 82 penetrating through the side wall of the sleeve 3 are fixedly connected to the sleeve 3, the two guide tubes 82 are respectively sleeved outside the two pressing rods 81, the guide tubes 82 are circular tubes, and the axes of the guide tubes 82 are arranged along the length direction of the pressing rods 81; a reset piece 84 is arranged in the guide pipe 82, the reset piece 84 has elasticity, and when the reset piece 84 is in a normal state, one end of the pressing rod 81 extends out of the sleeve 3; when the pressing levers 81 slide toward each other by an external force, the restoring member 84 is compressed, and after releasing the pressing of the two pressing levers 81, the two pressing levers 81 are restored by the restoring member 84.

Specifically, two pressing caps 83 are arranged at the ends of the two pressing rods 81, which are away from each other, and one ends of the pressing caps 83, which are close to the pressing rods 81, are open and are sleeved outside the pressing rods 81; the inner wall of the pressing cap 83 and the outer side of the pressing rod 81 are fixedly connected with two positioning rings, the positioning ring on the pressing cap 83 is positioned on one side, close to the lifting piece 5, of the positioning ring on the outer side of the pressing rod 81, and the positioning ring on the pressing cap 83 can abut against one side, close to the lifting piece 5, of the positioning ring on the outer side of the pressing rod 81. Specifically, the reset element 84 is a spring, the spring is sleeved on the outer side of the pressing rod 81, a stop ring 85 is fixedly connected to one end of the guiding tube 82 close to the lifting element 5, the spring is arranged between the stop ring 85 and the pressing cap 83, and two ends of the spring respectively abut against the stop ring 85 and the pressing cap 83.

Specifically, the bottom of the rotating shaft 2 is fixedly connected with a positioning plate 23, through holes 11 penetrating through the rotating plates 1 along the vertical direction are formed in the two rotating plates 1, the rotating shaft 2 penetrates through the through holes 11 in the two rotating plates 1 along the vertical direction, the bottom of the rotating shaft 2 is fixedly connected with the positioning plate 23, a positioning groove 12 is formed in the bottom of the rotating plate 1 located at the bottom, the positioning plate 23 can be embedded into the positioning groove 12, and the cross sections of the positioning plate 23 and the positioning groove 12 are polygonal; the sleeve 3 is internally provided with a propping piece 92, and the propping piece 92 has elasticity and applies upward elasticity to the rotating shaft 2; the positioning plate 23 can be stably inserted into the positioning groove 12 by the elastic force of the abutting member 92, so that the rotating shaft 2 is rotated in synchronization with the rotating plate 1 located at the bottom.

Specifically, the outer side of the rotating plate 1 positioned at the top is fixedly connected with a fixed sleeve 9 arranged around the through hole 11, and the bottom of the sleeve 3 is sleeved at the outer side of the fixed sleeve 9 and is rotationally connected with the fixed sleeve 9; a connecting ring 91 fixedly connected to the inner side of the fixed sleeve 9 is arranged in the fixed sleeve 9, and the rotating shaft 2 penetrates through the connecting ring 91; the outer side of the rotating shaft 2 is in threaded connection with a limiting ring 22, and the bottom of the limiting ring 22 is limited under the elastic action of the abutting piece 92; specifically, the abutting member 92 is a spring, the spring is sleeved outside the rotating shaft 2, one end of the bottom of the spring is fixedly connected to the top of the connecting ring 91, and one end of the top of the spring abuts against the bottom of the limiting ring 22.

Specifically, one side of each of the two rotating plates 1, which is close to each other, is fixedly connected with a plurality of arc-shaped protrusions 13 arranged around the axis of the rotating shaft 2, and any one of the arc-shaped protrusions 13 can be embedded between two adjacent protrusions 13 on the other rotating plate 1. Specifically, two connecting plates 10 are fixedly connected to the two rotating plates 1, and the two connecting plates 10 are respectively and fixedly connected to the two screen plates.

The working principle of the screen rotating shaft when in use is as follows: when the limiting rod 4 is inserted into the limiting groove 21, the two rotating plates 1 cannot rotate mutually, and when the limiting rod 4 is separated from the limiting groove 21, the two rotating plates 1 can rotate freely; through the arrangement of the limiting rod 4, when the rotation is not needed, the adjacent two screen plates can not freely rotate, and the shape of the screen can not be damaged under the action of external force.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A screen rotating shaft is characterized in that: the wind screen comprises two rotating plates (1), wherein the two rotating plates (1) are respectively and fixedly connected to two adjacent screen plates, and the two rotating plates (1) are vertically stacked together;

the sleeve (3) is fixedly connected to the top of the rotating plate (1) positioned at the top;

the rotating shaft (2) is fixedly connected to the rotating plate (1) positioned at the bottom, upwards penetrates through the rotating plate (1) positioned at the top and extends into the sleeve (3), and a limiting groove (21) is formed in the top of the rotating shaft (2);

the limiting rod (4) is arranged in the sleeve (3) and can slide up and down, and when the limiting rod (4) is inserted into the limiting groove (21), the rotating shaft (2) cannot rotate in the sleeve (3);

and the adjusting mechanism is used for adjusting the up-and-down movement of the limiting rod (4).

2. A screen hinge according to claim 1, wherein: the adjusting mechanism comprises a lifting piece (5) which is fixedly connected to the top of the adjusting rod and is used for driving the adjusting rod to slide up and down;

an elastic member (7) for pushing the lifting member (5) to slide upward;

a telescopic rod (61) which is provided in the lifter (5) and can slide in the lifter (5) in the horizontal direction;

the blocking piece (31) is fixed on the inner wall of the sleeve (3), when one end of the telescopic rod (61) extends out of the lifting piece (5) and tightly abuts against the bottom of the blocking piece (31), the limiting rod (4) is inserted into the limiting groove (21), and when the telescopic rod (61) is located above the blocking piece (31), the limiting rod (4) is separated from the limiting groove (21);

and a pressing component (8) for pushing the telescopic rod (61) to retract into the lifting piece (5).

3. A screen hinge according to claim 2, wherein: the telescopic links (61) are arranged in two numbers, the two telescopic links (61) are arranged in line symmetry relative to the rotating shaft (2) of the rotating shaft (2), the two telescopic links (61) can simultaneously abut against the bottom of the blocking piece (31) when extending out of the lifting piece (5), and the sliding directions of the two telescopic links (61) are located on the same horizontal straight line.

4. A screen hinge according to claim 3, wherein: a guide rod (62) is arranged below the telescopic rod (61), the guide rod (62) can slide on the lifting piece (5) and the sliding direction of the guide rod is the same as that of the telescopic rod (61) above the guide rod;

the guide rods (62) and the telescopic rods (61) located above the guide rods are connected together through the connecting rods (6) located in the lifting piece (5), the pressing assembly (8) comprises two pressing rods (81), when the telescopic rods (61) abut against the lower portion of the blocking piece (31), one ends, close to each other, of the two pressing rods (81) abut against one ends, far away from each other, of the two guide rods (62), and the two pressing rods (81) can push the two guide rods (62) to slide in opposite directions.

5. A screen hinge according to claim 4, wherein: at least one elastic part (63) is arranged between the two connecting rods (6) and used for pushing the two connecting rods (6) to slide towards the direction far away from each other.

6. A screen hinge according to claim 5, wherein: one end of each telescopic rod (61) which is away from each other is provided with an inclined surface, and the bottoms of the two inclined surfaces incline towards the direction of mutual approaching;

inclined planes are arranged at the positions, close to the two telescopic rods (61), of the blocking pieces (31), and the tops of the inclined planes incline towards the direction close to the side wall of the sleeve (3).

7. A screen hinge according to claim 6, wherein: the bottom of the rotating shaft (2) is fixedly connected with a positioning plate (23), through holes (11) penetrating through the rotating plates (1) along the vertical direction are formed in the two rotating plates (1), the rotating shaft (2) penetrates through the through holes (11) in the two rotating plates (1) along the vertical direction, a positioning groove (12) is formed in the bottom of the rotating plate (1) located at the bottom, the positioning plate (23) can be embedded into the positioning groove (12), and the cross sections of the positioning plate (23) and the positioning groove (12) are polygonal;

the sleeve (3) is internally provided with a propping piece (92), and the propping piece (92) has elasticity and applies upward elasticity to the rotating shaft (2).

8. A screen hinge according to claim 7, wherein: the outer side of the rotating shaft (2) is in threaded connection with a limiting ring (22), and the elastic force of the abutting piece (92) acts on the bottom of the limiting ring (22).

9. A screen hinge according to claim 8, wherein: one side that two rotor plates (1) are close to each other all fixedly connected with a plurality of arc arch (13) of arranging around axis of rotation (2), and arbitrary arc arch (13) can both be embedded into between two adjacent archs (13) on another rotor plate (1).

10. A screen hinge according to claim 9, wherein: fixedly connected with runs through two guiding tubes (82) of sleeve (3) lateral wall on sleeve (3), and two guiding tubes (82) overlap respectively and establish two according to the pressure lever (81) outside, are provided with in guiding tube (82) and reset (84), and reset (84) have elasticity, and when reset (84) were in the normality, one end according to pressure lever (81) stretched out outside sleeve (3).