CN212507861U - Anti-falling hinge and door and window assembly - Google Patents

Abstract

The utility model relates to an anti-falling hinge and door and window assembly, which comprises a sliding seat, an installation bracket for installing door and window sashes and a connecting rod assembly, wherein the installation bracket is arranged on the connecting rod assembly, and the connecting rod assembly is rotationally arranged on the sliding seat; the anti-falling hinge is characterized by further comprising a rotating clamping piece, wherein the rotating clamping piece comprises a rotating body and at least one convex body, the rotating body is linked with the connecting rod assembly, and the convex body is arranged on the rotating body; the rotating body can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat. When the door and window sash is opened, the mounting bracket rotates along with the door and window sash, and the rotating body can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat and is clamped with the necking groove of the door and window frame. Because the rotary clamping piece is clamped with the door and window frame, even if the screw of the fixed hinge is loosened, the door and window sash cannot fall, and the safety performance of the door and window sash is greatly improved.

Description

Anti-falling hinge and door and window assembly

Technical Field

The utility model relates to a door and window fan hardware fitting technical field, especially an anti-falling hinge and door and window subassembly.

Background

The hinge is a door and window fan hardware fitting commonly used, and its main function is to install the door and window fan on the door and window frame for the door and window fan can rotate relatively for the door and window frame.

The traditional hinge is fixed on the door and window sash through screws, but the screws are easily loosened after a long time, so that the door and window sash falls, and serious consequences are caused. Thus, there is still a need for improvements and developments in the existing hinges.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an anti-falling hinge and door and window subassembly, aim at solving current hinge and loose from the door and window frame easily, lead to the problem that the door and window fan falls.

The utility model provides a technical scheme that its technical problem adopted is: the anti-falling hinge comprises a sliding seat, an installation bracket for installing a door and window sash and a connecting rod assembly, wherein the installation bracket is arranged on the connecting rod assembly, and the connecting rod assembly is rotatably arranged on the sliding seat; the anti-falling hinge further comprises a rotating clamping piece, the rotating clamping piece comprises a rotating body and at least one convex body, the rotating body is linked with the connecting rod assembly, and the convex body is arranged on the rotating body; the rotating body can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat.

Further, the connecting rod assembly is arranged above the sliding seat, an accommodating groove is formed in the lower surface of the sliding seat, and the rotary clamping piece is arranged in the accommodating groove; when the door and window sash is in a closed state, the rotating body and the convex body are hidden in the accommodating groove; when the door and window sash is in an opening state, the convex body extends out of the accommodating groove.

Furthermore, the rotator is arranged on the sliding seat in a rotating mode through the rotating shaft, the number of the convex bodies is two, and the two convex bodies are symmetrically arranged on the rotator around the center of the rotating shaft.

Furthermore, the anti-falling hinge further comprises a guide rail used for being installed on the door and window frame, the sliding seat is arranged on the guide rail in a sliding mode, and at least one side wall of the guide rail is provided with a through hole for the protruding body to extend out.

The connecting rod assembly is rotatably arranged on the first sliding seat through a first shaft and a second shaft and rotatably arranged on the second sliding seat through a third shaft; at least one of the first shaft, the second shaft and the third shaft is provided with a rotary clamping piece, the connecting rod assembly drives the first shaft, the second shaft and the third shaft to rotate, and the shaft provided with the rotary clamping piece drives the rotary clamping piece on the shaft to rotate.

Further, the shaft provided with the rotary clamping piece and the rotary clamping piece on the shaft are integrally formed.

Furthermore, the connecting rod assembly comprises a first supporting rod, a second supporting rod and a third supporting rod, one end of the first supporting rod is connected with the first shaft, the other end of the first supporting rod is rotatably connected with the mounting bracket, and the first supporting rod rotates to drive the first shaft to rotate; one end of the third supporting rod is connected with the third shaft, the other end of the third supporting rod is rotatably connected with the mounting bracket, and the third supporting rod rotates to drive the third shaft to rotate; one end of the second support rod is connected with the second shaft, the other end of the second support rod is rotatably connected with the mounting bracket, and the second support rod rotates to drive the second shaft to rotate;

when the first sliding seat and the second sliding seat are close to or far away from each other, the rotating directions of the first supporting rod and the third supporting rod are the same, and the rotating directions of the second supporting rod and the mounting bracket are the same and opposite to the rotating direction of the third supporting rod.

Furthermore, the third support rod is rotatably connected with the second support rod through a fourth shaft and is rotatably connected with the mounting bracket through a fifth shaft, and the fourth shaft is positioned between the third shaft and the fifth shaft; the mounting bracket is rotatably connected with the first supporting rod through a sixth shaft, and the sixth shaft is located between the first shaft and the fifth shaft.

Further, the hinge further comprises a hinge convenient for mounting door and window sashes, and the hinge is mounted on the sixth shaft.

Furthermore, the mounting bracket is positioned above the first support rod and the third support rod, and the first support rod and the third support rod support the mounting bracket; the third supporting rod is positioned above the second supporting rod, and the second supporting rod supports the third supporting rod.

Furthermore, the anti-falling hinge further comprises a gear, and racks meshed with the gear are arranged on the first sliding seat and the second sliding seat, so that the first sliding seat and the second sliding seat synchronously and reversely slide.

Further, the rack of the first sliding seat and the rack of the second sliding seat are meshed on two sides of the gear in parallel.

The utility model also provides an anti-falling hinge, which comprises a sliding seat, an installation bracket for installing the door and window sash and a connecting rod assembly, wherein the installation bracket is arranged on the connecting rod assembly, and the connecting rod assembly is rotatably installed on the sliding seat; the anti-falling hinge also comprises a rotating clamping piece, the rotating clamping piece comprises a rotating body and at least one convex body, the rotating body is rotationally arranged on the sliding seat, and the convex body is arranged on the rotating body; the external force can drive the rotating body to rotate, so that the convex body is positioned outside the sliding seat.

Further, the rotator is arranged on the sliding seat in a rotating mode through a rotating shaft, and the connecting rod assembly is connected with the rotating shaft in a rotating mode.

The utility model also provides a door and window assembly, including door and window fan and door and window frame, still include the anti-falling hinge as above, the door and window frame is equipped with the necking groove, the slide seat sets up in the necking groove, the door and window fan is installed on the installing support; the rotator can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat and clamped with the necking groove.

For current hinge, the utility model provides a pair of prevent weighing down hinge and door and window subassembly is through setting up rotatory fastener. When the door and window sash is opened, the mounting bracket rotates along with the door and window sash, and the rotating body can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat and is clamped with the necking groove of the door and window frame. Because the rotary clamping piece is clamped with the door and window frame, even if the screw of the fixed hinge is loosened, the door and window sash cannot fall, and the safety performance of the door and window sash is greatly improved.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a partial cross-sectional view of a window and door frame provided in the prior art;

fig. 2 is a schematic view illustrating an opened state of the door/window assembly according to the present invention;

FIG. 3 is a schematic view of the door and window assembly of FIG. 2 in a closed position;

FIG. 4 is a schematic view of the fall arrest hinge of FIG. 2 with the sash opened;

FIG. 5 is a partially exploded schematic view of the fall arrest hinge of FIG. 4;

3 FIG. 3 6 3 is 3 a 3 schematic 3 view 3, 3 partly 3 in 3 section 3, 3 in 3 the 3 direction 3 A 3- 3 A 3 in 3 FIG. 32 3; 3

FIG. 7 is an exploded view of the fall arrest hinge of FIG. 4;

FIG. 8 is an exploded view of the fall arrest hinge of FIG. 7;

FIG. 9 is a schematic view of the fall arrest hinge of FIG. 3 with the sash closed;

FIG. 10 is a schematic view of the fall arrest hinge of FIG. 3 shown in a half-open position.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the conventional window and door frame 100 is provided with a necking groove 110 for mounting a hinge, and the necking groove 110 has a shape with a large inner space and a small opening, thereby facilitating the formation of a snap-fit structure. By adopting the structure, the utility model designs an anti-falling hinge 200 and a door and window assembly.

As shown in fig. 2, the window and door assembly includes a window and door sash 300 and a window and door frame 100, and further includes a falling-prevention hinge 200, and the window and door sash 300 is mounted on the window and door frame 100 through the falling-prevention hinge 200. Wherein, as shown in fig. 2, it is an opening state diagram of the door sash 300; as shown in fig. 3, which is a closed state view of the door sash 300, the door sash 300 is closed by the rotation of the anti-falling hinge 200.

As shown in fig. 4 and 5, the present invention provides an anti-falling hinge 200, which comprises a sliding seat 10, a mounting bracket 20 for mounting a door and window sash 300, and a connecting rod assembly 30. The mounting bracket 20 is arranged on a connecting rod assembly 30, and the connecting rod assembly 30 is rotatably arranged on the sliding seat 10.

The anti-falling hinge 200 further comprises a rotating fastener 50, the rotating fastener 50 comprises a rotating body 51 and at least one convex body 52, the rotating body 51 is linked with the connecting rod assembly 30, and the convex body 52 is arranged on the rotating body 51. The rotating body 52 can rotate with the connecting rod assembly 30, so that the convex body 52 is positioned outside the sliding seat 10.

When the sash 300 is opened, the mounting bracket 20 rotates together with the sash 300, and the rotating body 52 rotates together with the link assembly 30, so that the protrusion 52 is positioned outside the slider 10 and is engaged with the slot 110 (see fig. 6). Because the rotary clamping piece 50 is clamped with the door and window frame 100, even if the screw for fixing the hinge is loosened, the door and window sash 300 can not fall, and the safety performance of the door and window sash 300 is greatly improved.

Referring to fig. 5, the link assembly 30 is disposed above the slide 10, a receiving groove 13 is formed on a lower surface of the slide 10, and the rotary latch 50 is disposed in the receiving groove 13. So that the rotational catch 50 does not interfere with the movement of the slide 10. When the door sash 300 is in the closed state, the rotary body 51 and the convex body 52 are hidden in the receiving groove 13; when the door 300 is in the open state, the protrusion 52 extends out of the receiving groove 13 and is engaged with the notch 110 to prevent the door from falling.

In the present embodiment, there are two protrusions 52, and the two protrusions 52 are symmetrically disposed on the rotating body 51 around the center of the rotating shaft 40. Therefore, the two convex bodies 52 can be extended out by rotating the rotating body 51 for 90 degrees, and the two convex bodies 52 are simultaneously clamped with the necking grooves 110, so that the clamping stability is greatly improved, and the door and window sash 300 is prevented from falling. Specifically, the two bosses 52 are integrally formed with the rotating body 51.

As shown in fig. 7, in the present embodiment, the slide carriage 10 includes a first slide carriage 11 and a second slide carriage 12 which slide in opposite directions, and the link assembly 30 is rotatably disposed on the first slide carriage 11 via a first shaft 41 and a second shaft 42, and rotatably disposed on the second slide carriage 12 via a third shaft 43. By arranging the first sliding seat 11 and the second sliding seat 12 which slide in opposite directions, the sliding distance of the components can be shortened by the structure with two sliding sides, and the service life is greatly prolonged.

Specifically, at least one of the first shaft 41, the second shaft 42 and the third shaft 43 is provided with a rotary latch 50. The connecting rod assembly 30 drives the first shaft 41, the second shaft 42 and the third shaft 43 to rotate, and the shaft provided with the rotary clamping piece 50 drives the rotary clamping piece 50 on the shaft to rotate. In this embodiment, the shaft on which the rotational catch 50 is provided is integrally formed with the rotational catch 50 thereon. For example, the first shaft 41 is provided with a rotary latch 50, and the first shaft 41 is integrally formed with the rotary latch 50 thereon.

In order to improve the anti-falling performance of the door sash 300, the first shaft 41, the second shaft 42 and the third shaft 43 are all provided with rotating fasteners 50. When the door 300 is in an open state, three rotary fasteners 50 are simultaneously clamped with the necking grooves 110, so that the door 300 cannot fall.

In other embodiments, the sliding base 10 may further include a fixed block and two sliding blocks, the fixed block is disposed between the two sliding blocks, and the two sliding blocks are slidable relative to the fixed block.

In the present embodiment, the connecting rod assembly 30 includes a first supporting rod 31, a second supporting rod 32 and a third supporting rod 33. One end of the first supporting rod 31 is connected with the first shaft 41, the other end of the first supporting rod 31 is rotatably connected with the mounting bracket 20, and the first supporting rod 31 rotates to drive the first shaft 41 to rotate. One end of the third supporting rod 33 is connected with the third shaft 43, the other end thereof is rotatably connected with the mounting bracket 20, and the third supporting rod 33 rotates to drive the third shaft 43 to rotate. One end of the second support rod 32 is connected to the second shaft 42, and the other end thereof is rotatably connected to the mounting bracket 20, so that the second support rod 32 rotates to drive the second shaft 42 to rotate. That is, the first support bar 31 is linked with the first shaft 41, the second support bar 32 is linked with the second shaft 42, and the third support bar 33 is linked with the third shaft 43.

When the first carriage 11 and the second carriage 12 approach or depart from each other, the first support rod 31 and the third support rod 33 rotate in the same direction, and the second support rod 32 and the mounting bracket 20 rotate in the same direction and opposite to the third support rod 33. The opening and closing of the door and window sash 300 are realized by using the three support rods, the number of parts is less, the structure is simplified, and the movement is smoother.

Referring to fig. 8, the connection manner of the three support rods and the three shafts is specifically as follows: be equipped with quad slit 1 on the bracing piece, epaxial being equipped with quad slit 1 complex square post 2, when square post 2 and quad slit 1 cooperation, the rotation of bracing piece can drive the synchronous rotation of axle, then the axle drives rotatory fastener 50 synchronous rotation.

Referring to fig. 6 and 7, the anti-falling hinge 200 further includes a rail 80 for being mounted on the door window frame 100, the first slide 11 and the second slide 12 are slidably disposed on the rail 80, and at least one side wall of the rail 80 is provided with a through hole 81 for the protrusion 52 to extend. Specifically, the two sides of the guide rail 80 are provided with bar-shaped through holes 81, which can be set according to the number and position of the rotary fasteners 50.

In installation, the rail 80 is locked in the throat groove 110 by a screw, so that the carriage 10 is disposed in the throat groove 110. When the door and window 300 needs to be opened, the mounting bracket 20 rotates to drive the rotating shaft 40 to rotate, and the rotating clamping piece 50 rotates along with the rotating shaft 40 to extend out and is clamped with the necking groove. Wherein, the necking groove 110 is a T-shaped groove.

In this embodiment, a T-shaped sliding slot is formed on the guide rail 80, and the first slide 11 and the second slide 12 are slidably disposed in the T-shaped sliding slot. The first sliding seat 11 and the second sliding seat 12 can only slide into the T-shaped sliding groove from one end of the guide rail 80 to realize installation, and the installation mode is stable and compact and is not easy to shake.

Above-mentioned transmission structure, door and window fan 300's effort is transmitted to three rotatory fastener 50 by installing support 20, link assembly 30, three axle, by because three rotatory fastener 50 and door and window frame 100 joint, consequently, transmits the effort to door and window frame 100 on, reduces the atress of guide rail 80 greatly, reduces the not hard up condition of screw.

For more stable installation of the door and window sash 300, the anti-falling hinge 200 further comprises a hinge 70, the hinge 70 is arranged on the installation bracket 20, and the side edge of the door and window sash 300 is fixed on the hinge 70 through a screw. So that the mounting bracket 20 can be rotated in synchronization with the door sash 300.

In this embodiment, the third support rod 33 is rotatably connected to the second support rod 32 via a fourth shaft 61 and rotatably connected to the mounting bracket 20 via a fifth shaft 62, the fourth shaft 61 being located between the third shaft 43 and the fifth shaft 62. Thus, the connecting line of the second shaft 42, the third shaft 43 and the fourth shaft 61 on the same plane forms a triangle, and when the first slide 11 and the second slide 12 slide in opposite directions, the second support rod 32 and the third support rod 33 rotate in opposite directions. For example, when the first carriage 11 and the second carriage 12 approach each other, the second support bar 32 rotates counterclockwise, and the third support bar 33 rotates clockwise.

In addition, the mounting bracket 20 is rotatably connected to the first support rod 31 by a sixth shaft 63, the sixth shaft 63 being located between the first shaft 41 and the fifth shaft 62. Thus, the connecting lines of the first shaft 41, the second shaft 42, the fourth shaft 61, the fifth shaft 62 and the sixth shaft 63 on the same plane form a pentagon, so that the first supporting rod 31 and the third supporting rod 33 rotate in the same direction, and the second supporting rod 32 and the mounting bracket 20 rotate in the same direction. Wherein, each side length of the triangle and the pentagon is set according to actual needs to reach the purpose of smoothly opening or closing the door and window sash 300.

In the present embodiment, the length of the second support bar 32 is greater than the length of the first support bar 31, and the length of the third support bar 33 is greater than the length of the second support bar 32. The hinge 70 is mounted on the sixth shaft 63 to facilitate mounting of the door sash 300.

As shown in FIG. 9, the door sash 300 is shown in a folded state with the fall preventing hinge 200 closed. The mounting bracket 20 is located above the first support bar 31 and the third support bar 33, and the first support bar 31 and the third support bar 33 support the mounting bracket 20. That is, the first support rod 31, the second support rod 32 and the third support rod 33 support the door and window sash 300 together, and the structure is stable, so that the support force is greatly improved.

In addition, the third support bar 33 is located above the second support bar 32, and the second support bar 32 supports the third support bar 33. The structure is beneficial to the mutual overlapping and storage of the first support rod 31, the second support rod 32, the third support rod 33 and the mounting bracket 20 when the door window sash 300 is closed, so that the interference phenomenon is avoided.

As shown in FIG. 10, the anti-falling hinge further comprises a gear 90, and the first slide 11 and the second slide 12 are both provided with a rack 14 engaged with the gear 90, so that the first slide 11 and the second slide 12 can synchronously slide in opposite directions. The first slide 11 and the second slide 12 are linked through the gear 90, so that the whole mechanism moves more compactly and smoothly. Wherein, the rack of the first slide 11 and the rack of the second slide 12 are meshed on two sides of the gear 90 in parallel.

To prevent dust from entering gear 90 and affecting smooth sliding of gear 90, a shutter 91 for shielding gear 90 is further mounted on rail 80.

In other embodiments, the anti-falling hinge further comprises a motor, wherein the motor is in transmission connection with the gear 90 and can drive the gear 90 to rotate so as to drive the first slide 11 and the second slide 12 to synchronously slide in opposite directions. Through using the motor, can realize opening or closing the automation of door and window fan 300, it is more convenient and intelligent to use.

The anti-falling hinge further comprises a limiting plate 92, wherein the limiting plate 92 is L-shaped and is clamped at the end part of the guide rail 80. During installation, the limiting plate 92 is clamped in the groove on the side wall of the door/window frame 100, so that the stability of the anti-falling hinge 200 is further improved, and the anti-falling hinge 200 can bear large external acting force, such as wind power.

Referring to fig. 10, the state of the fall preventing hinge 200 is schematically shown when the door sash 300 is in the half-open state. When the gear 90 rotates clockwise and the first slide 11 and the second slide 12 approach each other, the mounting bracket 20 rotates counterclockwise and moves away from the first slide 11, so that the door and window 300 is opened. After the door and window 300 is opened, the anti-falling hinge 200 is in a state shown in fig. 4, and the rotary clamping piece 50 is in an extending state and can be clamped with the necking groove 110 to prevent the door and window 300 from falling.

Referring to fig. 9, the door sash 300 is illustrated in a closed state with the anti-falling hinge 200. When the gear 90 rotates counterclockwise and the first slide 11 and the second slide 12 move away from each other, the mounting bracket 20 approaches the first slide 11, so that the second support bar 32, the third support bar 33 and the mounting bracket 20 are overlapped, and the door 300 is closed. After the door and window sash 300 is closed, the anti-falling hinge 200 is in the state shown in fig. 9, and the rotary clamping piece 50 is in the unextended state and is not clamped with the notch groove 110, so that the guide rail 80 of the anti-falling hinge 200 is conveniently installed in the notch groove 110.

In other embodiments, the rotating body 51 may not be in transmission connection with the connecting rod assembly 30, but rather is rotatably disposed on the sliding seat 10, and an external force may drive the rotating body 51 to rotate, so that the protrusion 52 is located outside the sliding seat 10 and engaged with the necking groove 110, so that the protrusion 52 is always engaged with the necking groove 110. For example, the rotary body 51 is rotatably provided on the slide by a rotary shaft to which the link assembly 30 is rotatably connected. The rotating body 51 and the rotating shaft are fixed together and can rotate synchronously, the connecting assembly 30 and the rotating shaft rotate relatively, and the rotating shaft is not driven to rotate by the movement of the connecting assembly 30. The rotating shaft is driven to rotate by external force, the rotating body 51 is driven to rotate, the convex body 52 is positioned outside the sliding seat 10 and clamped with the necking groove 110, the clamping with the door and window frame 100 can be kept all the time, and the anti-falling effect can be achieved.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims (15)

1. An anti-falling hinge comprises a sliding seat, a mounting bracket for mounting a door and window sash and a connecting rod assembly, wherein the mounting bracket is arranged on the connecting rod assembly, and the connecting rod assembly is rotatably arranged on the sliding seat; the anti-falling hinge is characterized by further comprising a rotating clamping piece, wherein the rotating clamping piece comprises a rotating body and at least one convex body, the rotating body is linked with the connecting rod assembly, and the convex body is arranged on the rotating body; the rotating body can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat.

2. The anti-falling hinge according to claim 1, wherein the connecting rod assembly is arranged above the sliding seat, a receiving groove is formed in the lower surface of the sliding seat, and the rotating clamping piece is arranged in the receiving groove; when the door and window sash is in a closed state, the rotating body and the convex body are hidden in the accommodating groove; when the door and window sash is in an opening state, the convex body extends out of the accommodating groove.

3. The anti-falling hinge according to claim 2, wherein the rotating body is rotatably arranged on the sliding seat through a rotating shaft, and the number of the convex bodies is two, and the two convex bodies are arranged on the rotating body in a manner of being centrosymmetric around the rotating shaft.

4. The anti-falling hinge according to claim 1, further comprising a rail for mounting on a door or window frame, wherein the sliding seat is slidably disposed on the rail, and at least one sidewall of the rail is provided with a through hole for the protrusion to extend out.

5. The anti-falling hinge according to any one of claims 1 to 4, wherein the slide comprises a first slide and a second slide which slide in opposite directions, the connecting rod assembly is rotatably arranged on the first slide through a first shaft and a second shaft, and is rotatably arranged on the second slide through a third shaft; at least one of the first shaft, the second shaft and the third shaft is provided with a rotary clamping piece, the connecting rod assembly drives the first shaft, the second shaft and the third shaft to rotate, and the shaft provided with the rotary clamping piece drives the rotary clamping piece on the shaft to rotate.

6. The fall arrest hinge according to claim 5 wherein the shaft with the rotational catch is integrally formed with the rotational catch thereon.

7. The anti-fall hinge according to claim 5, wherein the connecting rod assembly comprises a first support rod, a second support rod and a third support rod, one end of the first support rod is connected with the first shaft, the other end of the first support rod is rotatably connected with the mounting bracket, and the first support rod rotates to drive the first shaft to rotate; one end of the third supporting rod is connected with the third shaft, the other end of the third supporting rod is rotatably connected with the mounting bracket, and the third supporting rod rotates to drive the third shaft to rotate; one end of the second support rod is connected with the second shaft, the other end of the second support rod is rotatably connected with the mounting bracket, and the second support rod rotates to drive the second shaft to rotate;

when the first sliding seat and the second sliding seat are close to or far away from each other, the rotating directions of the first supporting rod and the third supporting rod are the same, and the rotating directions of the second supporting rod and the mounting bracket are the same and opposite to the rotating direction of the third supporting rod.

8. The fall arrest hinge according to claim 7 wherein the third support bar is pivotally connected to the second support bar by a fourth axis and pivotally connected to the mounting bracket by a fifth axis, the fourth axis being located between the third axis and the fifth axis; the mounting bracket is rotatably connected with the first supporting rod through a sixth shaft, and the sixth shaft is located between the first shaft and the fifth shaft.

9. The fall arrest hinge according to claim 8, further comprising a hinge to facilitate mounting of door and window sashes, the hinge being mounted on the sixth axis.

10. The fall arrest hinge according to claim 7 wherein the mounting bracket is located above the first and third support bars, the first and third support bars supporting the mounting bracket; the third supporting rod is positioned above the second supporting rod, and the second supporting rod supports the third supporting rod.

11. The anti-fall hinge according to claim 5, further comprising a gear, wherein the first and second carriages are provided with a rack engaged with the gear, so that the first and second carriages synchronously slide in opposite directions.

12. The fall arrest hinge according to claim 11 wherein the parallel engagement of the racks of the first and second carriages is on either side of the gear.

13. An anti-falling hinge comprises a sliding seat, a mounting bracket for mounting a door and window sash and a connecting rod assembly, wherein the mounting bracket is arranged on the connecting rod assembly, and the connecting rod assembly is rotatably mounted on the sliding seat; the anti-falling hinge is characterized by further comprising a rotating clamping piece, wherein the rotating clamping piece comprises a rotating body and at least one convex body, the rotating body is rotatably arranged on the sliding seat, and the convex body is arranged on the rotating body; the external force can drive the rotating body to rotate, so that the convex body is positioned outside the sliding seat.

14. The fall arrest hinge according to claim 13 wherein the rotating body is rotatably mounted to the carriage by a pivot, the linkage assembly being rotatably connected to the pivot.

15. A door and window assembly comprising door and window sashes and a door and window frame, and further comprising the anti-falling hinge as claimed in any one of claims 1 to 14, wherein the door and window frame is provided with a notch groove, the slide seat is arranged in the notch groove, and the door and window sashes are mounted on the mounting bracket; the rotator can rotate along with the connecting rod assembly, so that the convex body is positioned outside the sliding seat and clamped with the necking groove.

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