An anti-pinch device and anti-pinch doors and windows

Abstract

The present invention discloses a pinch prevention device and pinch prevention doors and windows. The pinch prevention device includes: a housing provided with a chute extending in the left-right direction, and a card slot extending forward is connected to the left end of the chute; a swing rod, one end of which is rotatably connected to the housing, the other end of the swing rod protrudes backward from the housing, a connecting rod is rotatably connected to the swing rod, a positioning column is connected to the connecting rod, and the positioning column can move in the chute and the card slot; an elastic component having a tendency to move the positioning column to the left end of the chute. The present invention can effectively play a role in preventing pinching, and is also applicable to doors with heavier weights or doors and windows with faster closing speeds, with stronger practicability.

Description

Technical Field

[0001] The present invention relates to a door and window fitting, and in particular to a pinch prevention device and a pinch prevention door and window. Background Art

[0002] When people close the window sash, if they operate carelessly, it is easy to pinch their fingers. Especially, the faster the window sash closes, the greater the harm to personal safety. In this regard, in order to improve the safety of use in the current market, a buffer is installed on the door and window, and a rubber strip is added to the pinch prevention part. However, when installing the buffer, it is required that the weight of the door leaf does not exceed 100 kg, otherwise the buffer is likely to fail. And installing the rubber strip to prevent pinching can only play a role when the closing force of the door leaf is small. If the closing force of the door leaf is large, limited by the deformation and buffering ability of the rubber strip, a large harm will also be caused in case of pinching. Therefore, there is an urgent need for a structure that can prevent pinching when the door leaf is closed. Summary of the Invention

[0003] The purpose of the present invention is to provide a pinch prevention device and a pinch prevention door and window to solve one or more technical problems in the prior art, and at least provide a beneficial choice or create conditions.

[0004] The solution of the present invention to solve its technical problems is:

[0005] A pinch prevention device includes: a housing provided with a chute extending in the left - right direction, the left end of the chute being connected with a forward - extending card slot; a swing rod, one end of which is rotatably connected to the housing, the other end of the swing rod protruding backward from the housing, a connecting rod being rotatably connected to the swing rod, a positioning post being connected to the connecting rod, and the positioning post being movable in the chute and the card slot; and an elastic component having a tendency to move the positioning post to the left end of the chute.

[0006] The technical solution has at least the following beneficial effects: The housing is installed on the door leaf or door frame of the peripheral device. When closing the door or window with a large force, the part of the swing rod protruding from the housing abuts against the door frame or door leaf. The swing rod transmits a large external force to the positioning post through the connecting rod, causing the positioning post to overcome the elastic force of the elastic component and directly slide into the card slot. Due to the activity restriction of the card slot on the positioning post, the swing rod cannot continue to rotate at this time, thereby blocking the continued closing of the door or window. At this time, it can prevent the problem of personal injury caused by excessive force when closing the door or window. After removing the external force on the door or window, the elastic force of the elastic component causes the positioning post to return from the card slot to the sliding groove. When applying a small force to close the door or window, the external force transmitted by the swing rod to the positioning post through the connecting rod is small and insufficient to cause the positioning post to overcome the elastic force of the elastic component and enter the card slot. At this time, the positioning post moves to the right in the sliding groove, and the swing rod can continue to rotate, thus not interfering with the closing of the door or window. And the positioning post needs to overcome the elastic force of the elastic component during the process of moving to the right, which can reduce the speed when closing the door or window at this time, thereby effectively reducing the injury caused by pinching. When the door or window is opened, the elastic force of the elastic component will cause the positioning post to return to the left end of the sliding groove for use when closing the door or window next time. In this way, it can effectively play the role of preventing pinching, and it is also applicable to the case where the door leaf is heavy or the closing speed of the door or window is fast, with stronger practicability.

[0007] As a further improvement of the above technical solution, the elastic component includes a tension spring and a spring piece. The tension spring is connected between the housing and the swing rod, and the tension spring has a tendency to rotate the swing rod backward to protrude from the housing. The spring piece is connected to the housing, and the spring piece abuts against the positioning post and has a tendency to press the positioning post backward into the sliding groove. When the swing rod abuts against the door frame or door leaf of the peripheral device, the swing rod rotates and stretches the tension spring. When closing the door or window with a large force, the external force transmitted by the swing rod to the positioning post through the connecting rod directly overcomes the elastic force of the spring piece and enters the card slot. In this way, the continued rotation of the swing rod can be restricted. When closing the door or window with a small force, the external force transmitted by the swing rod to the positioning post through the connecting rod is less than the backward pressure of the spring piece on the positioning post. As the swing rod continues to rotate, the positioning post moves to the right in the sliding groove. In this way, it can not interfere with the closing of the door or window, and the tension spring always provides a backward pulling force on the swing rod, which can realize the deceleration and buffering when closing the door or window and the function of the swing rod swinging backward and resetting. In this way, the tension spring and the spring piece provide elastic forces from different directions, which can enable the positioning post to move stably in the card slot and the sliding groove.

[0008] As a further improvement of the above technical solution, the elastic piece includes a pressing section, a transition section and a connecting section. The middle of the connecting section arches forward to form an arc-shaped groove, and a positioning pin is inserted into the arc-shaped groove. The positioning pin is connected to the housing. The left side of the connecting section extends obliquely forward and abuts against the housing. The transition section is connected to the right side of the connecting section and extends backward. The pressing section is connected to the rear side of the transition section and extends leftward. The pressing section abuts against the positioning post. The positioning pin is located between the pressing section and the connecting section and is fitted and connected in the arc-shaped groove where the connecting section arches. When the external force transmitted by the connecting rod to the positioning post presses the pressing section backward, the entire elastic piece can rotate around the positioning pin. The connecting section abutting against the housing can produce elastic deformation, and the pressing section abutting against the positioning post will also produce elastic deformation. When the pressure of the positioning post is greater than the backward elastic force of the entire elastic piece on the positioning post, the positioning post enters the card slot. When the external force on the positioning post is removed, the elastic forces of the connecting section and the pressing section will push the positioning post backward out of the card slot, so that the positioning post returns to the left end of the sliding groove.

[0009] As a further improvement of the above technical solution, a clamping block is rotatably connected to both the inside of the housing and the swing rod. Clamping grooves are provided on one side of the two clamping blocks facing each other. Clamping portions are provided at both ends of the tension spring, and the two clamping portions are respectively fitted and connected in the two clamping grooves. The tension spring is connected to the two clamping blocks through the clamping portions at both ends. The two clamping blocks can rotate independently. During use, as the swing rod rotates, the two clamping blocks can also be driven to rotate. In this way, the tension spring can be stretched along a straight line, is not easily deformed or damaged, and better prevents the tension spring from failing.

[0010] As a further improvement of the above technical solution, the swing rod includes a top plate, a bottom plate and a connecting frame. One end of the top plate is rotatably connected to the inner top side of the housing, and one end of the bottom plate is rotatably connected to the inner bottom side of the housing. The connecting frame is connected between the top plate and the bottom plate. One of the clamping blocks and one end of the connecting rod are both rotatably connected between the top plate and the bottom plate. The top plate and the bottom plate are respectively rotatably connected to the inner top side and the inner bottom side of the housing. Placing the swing rod into the housing can reduce the exposure of the structure and make the overall structure more compact. At this time, the rear end of the swing rod protrudes backward from the housing. During rotation, the swing rod can directly rotate forward and be received into the housing. The connecting frame separates and connects the top plate and the bottom plate. Since the clamping block is rotatably connected between the top plate and the bottom plate, one end of the tension spring also extends between the top plate and the bottom plate at this time. The top plate and the bottom plate are used to limit the tension spring up and down, and improve the stability when the tension spring applies force to the swing rod. Similarly, one end of the connecting rod is also rotatably connected between the top plate and the bottom plate, and the top plate and the bottom plate can be used to limit the connecting rod up and down and improve the stability when transmitting external force to the connecting rod.

[0011] As a further improvement of the above technical solution, the clamping groove passes through the clamping block in the up-down direction, the clamping part enters the clamping groove in the up-down direction, the outer diameter of the clamping part gradually decreases from both ends to the middle, and both sides of the notch of the clamping groove have limit blocks protruding toward the middle of the clamping part. When the tension spring is installed on the clamping block, the clamping part of the tension spring can be matched into the clamping groove in the up-down direction, and the limit blocks protruding on both sides of the notch of the clamping groove and the inner concave in the middle of the clamping part can be used to limit the tension spring from directly falling out of the notch, so that the tension spring can be quickly positioned, and the force on the end of the tension spring during the rotation of the swing rod can be enhanced, so as to better prevent the failure of the tension spring.

[0012] As a further improvement of the above technical solution, the rear end of the swing rod is rotatably connected to a guide wheel, and the guide wheel protrudes backward from the rear end of the swing rod. When the swing rod contacts the external door frame or door leaf, the guide wheel will abut against the external door frame or door leaf, and the rotation of the guide wheel can reduce the friction between the door frame and the door leaf, thereby improving the user experience.

[0013] As a further improvement of the above technical solution, the housing includes a top cover, a bottom cover connected to the bottom side of the top cover, a cavity with an opening facing backward is formed between the top cover and the bottom cover, one end of the swing rod is rotatably connected between the top cover and the bottom cover, a slide groove and a clamping groove are provided on the top cover and the bottom cover, and the upper and lower ends of the positioning column are both located in the slide groove or the clamping groove. During installation, the swing rod and the positioning column and other structures can be conveniently installed on the top cover or the bottom cover first, and then the top cover and the bottom cover are combined and connected to each other, so as to achieve overall rapid assembly, and both ends of the swing rod are rotatably connected with the top cover and the bottom cover, and the top cover and the bottom cover also have slide grooves and clamping grooves for limiting the positioning column, which can further improve the stability of the swing rod and the positioning column when they are active.

[0014] A finger-pinch prevention door and window comprises a casement door frame, a casement door leaf and the above-mentioned finger-pinch prevention device, wherein the casement door leaf is hinged in the casement door frame, the outer shell is connected in the casement door frame, and the rear end of the swing rod abuts against the indoor side of the casement door leaf.

[0015] This technical solution has at least the following beneficial effects: for a swing door, when the swing door leaf needs to be closed, the swing door leaf is rotated to be close to the swing door frame. When the swing door leaf is against the swing rod, the above-mentioned braking or deceleration effect on the rotation of the swing door leaf can be achieved, thereby realizing the function of preventing hand pinching in the swing door.

[0016] A finger-pinch-proof door and window comprises a sliding window frame, a sliding window sash and the above-mentioned finger-pinch-proof device, wherein the sliding window sash is slidably connected to the sliding window frame, the outer shell is connected to one side of the sliding window sash, and the swing rod can abut against one side of the sliding window frame.

[0017] The technical solution has at least the following beneficial effects: for a sliding window, when it is necessary to close the sliding window sash, push the sliding window sash towards one side of the sliding window frame. When the swing rod on the sliding window sash abuts against the sliding window frame, the above-mentioned sliding braking or decelerating effect on the sliding window sash can be achieved, thus realizing the function of preventing pinching hands in the sliding window. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all the embodiments. Those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative efforts.

[0019] Figure 1 is an exploded structural schematic diagram of the pinch prevention device of the present invention;

[0020] Figure 2 is an assembled structural schematic diagram of the pinch prevention device of the present invention after removing the top cover and the top plate;

[0021] Figure 3 is an assembled structural schematic diagram of the pinch prevention device of the present invention;

[0022] Figure 4 is a structural schematic diagram of the first embodiment of the pinch prevention door and window of the present invention;

[0023] Figure 5 is a structural schematic diagram of the second embodiment of the pinch prevention door and window of the present invention.

[0024] In the drawings: 110 - top cover, 111 - sliding groove, 112 - clamping groove, 120 - bottom cover, 200 - swing rod, 210 - top plate, 220 - bottom plate, 230 - connecting frame, 240 - guide wheel, 300 - connecting rod, 310 - positioning column, 410 - tension spring, 411 - clamping portion, 420 - elastic piece, 421 - pressing section, 422 - transition section, 423 - connecting section, 424 - arc groove, 425 - positioning pin, 430 - clamping block, 431 - clamping groove, 510 - French window frame, 520 - French window sash, 610 - sliding window frame, 620 - sliding window sash. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0026] In the description of the present invention, it should be understood that, regarding the orientation description, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0027] In the description of the present invention, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more. Understanding such as "greater than", "less than", "exceeding", etc. does not include the recited number, and understanding such as "above", "below", "within", etc. includes the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, words such as "arrangement", "installation", "connection", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0029] Referring to Figure 1 、 Figure 2 and Figure 3 , a pinch prevention device includes a housing, a swing rod 200 and an elastic component. Among them, the housing is provided with a chute 111 and a card slot 112. There is a certain inclination angle between the chute 111 and the card slot 112. For example, the chute 111 extends in the left - right direction, the card slot 112 extends in the front - back direction, and the card slot 112 is connected to the left end of the chute 111. One end of the swing rod 200 is rotatably connected to the housing, and the other end of the swing rod 200 protrudes backward from the housing. The rotation axes at both ends of the swing rod 200 extend in the up - down direction. A connecting rod 300 is rotatably connected to the swing rod 200. The end of the connecting rod 300 can rotate in the middle of the swing rod 200 around a rotation axis extending in the up - down direction. A positioning column 310 is connected to the connecting rod 300. The positioning column 310 extends in the up - down direction, and the end of the positioning column 310 extends into the chute 111 and the card slot 112. When the swing rod 200 rotates, the swing rod 200 can drive the positioning column 310 to move in the chute 111 and the card slot 112 through the connecting rod 300. The elastic component has a tendency to move the positioning column 310 to the left end of the chute 111.

[0030] As can be seen from the above, when the outer shell is installed on the door leaf or door frame of a peripheral device, when the force for closing the door or window is relatively large, the part of the swing rod 200 protruding from the outer shell abuts against the door frame or door leaf. The swing rod 200 transmits a relatively large external force to the positioning post 310 through the connecting rod 300, causing the positioning post 310 to overcome the elastic force of the elastic component and directly slide into the card slot 112. Due to the restriction of the movement of the positioning post 310 by the card slot 112, the swing rod 200 cannot continue to rotate at this time, thereby preventing the door or window from closing further. At this time, the problem of personal injury caused by excessive force when closing the door or window can be prevented. After removing the external force on the door or window, the elastic force of the elastic component causes the positioning post 310 to return from the card slot 112 to the sliding groove 111. When the force applied when closing the door or window is relatively small, the external force transmitted by the swing rod 200 to the positioning post 310 through the connecting rod 300 is relatively small, which is not sufficient to cause the positioning post 310 to overcome the elastic force of the elastic component and enter the card slot 112. At this time, the positioning post 310 moves to the right in the sliding groove 111, and the swing rod 200 can continue to rotate, thereby not interfering with the closing of the door or window. And when the positioning post 310 moves to the right, it needs to overcome the elastic force of the elastic component. At this time, the speed when closing the door or window can be reduced, thereby effectively reducing the injury caused by pinching hands. When the door or window is opened, the elastic force of the elastic component will cause the positioning post 310 to return to the left end of the sliding groove 111 for use when closing the door or window next time. In this way, the function of preventing pinching hands can be effectively achieved, and it is also applicable to the case where the door leaf is relatively heavy or the speed of closing the door or window is relatively fast, with stronger practicability.

[0031] When the positioning post 310 is located at the left end of the sliding groove 111, it has two movable paths: moving forward into the card slot 112 to brake the swing of the swing rod 200 or moving to the right to decelerate the swing of the swing rod 200. At this time, the elastic component has a tendency to move the positioning post 310 to the left end of the sliding groove 111. According to the comparison between the magnitude of the external force transmitted to the positioning post 310 and the elastic force of the elastic component on the positioning post 310, the movement of the positioning post 310 is judged. And when an external force acts on the swing rod 200, the swing rod 200 drives the positioning post 310 to move forward into the card slot 112 for braking or slide to the right in the sliding groove 111 to decelerate. When the external force is removed, the positioning post 310 needs to be reset. To sum up, the elastic component needs to have this function, and there are also various structural forms. For example, directly using a spring to apply an elastic force to the positioning post 310 in the left rear direction can make the positioning post 310 always have a tendency to move to the left end of the sliding groove 111. In this embodiment, the elastic component includes a tension spring 410 and a spring piece 420. The tension spring 410 is connected between the outer shell and the swing rod 200. The tension spring 410 has a tendency to rotate the swing rod 200 backward to protrude from the outer shell. The spring piece 420 is connected to the outer shell. The spring piece 420 abuts against the positioning post 310 and has a tendency to press the positioning post 310 backward into the sliding groove 111.

[0032] In the elastic component of this embodiment, when the swing rod 200 abuts against the external door frame or door leaf, the swing rod 200 rotates and stretches the tension spring 410. When the closing force of the door or window is large, the external force transmitted by the swing rod 200 to the positioning column 310 through the connecting rod 300 directly overcomes the elastic force of the elastic piece 420 and enters the card slot 112, thus restricting the continuous rotation of the swing rod 200. When the closing force of the door or window is small, the external force transmitted by the swing rod 200 to the positioning column 310 through the connecting rod 300 is less than the backward pressure of the elastic piece 420 on the positioning column 310. As the swing rod 200 continues to rotate, the positioning column 310 moves to the right in the sliding groove 111, thus not interfering with the closing of the door or window. The tension spring 410 always provides a backward pulling force on the swing rod 200, which can realize the deceleration buffer when the door or window is closed and the function of the swing rod 200 swinging backward to reset. In this way, the tension spring 410 and the elastic piece 420 provide elastic forces from different directions, enabling the positioning column 310 to move stably in the card slot 112 and the sliding groove 111.

[0033] In the above embodiment, the elastic piece 420 can be a whole sheet-like structure. One end of the elastic piece 420 is connected inside the housing, and the other end presses against the positioning post 310, providing a backward pressure to the positioning post 310. In order to improve the service life of the elastic piece 420 and prevent the elastic piece 420 from being unable to produce elastic deformation, in this embodiment, the elastic piece 420 includes a pressing section 421, a transition section 422 and a connecting section 423. The middle of the connecting section 423 arches forward to form an arc-shaped groove 424. A positioning pin 425 is inserted into the arc-shaped groove 424. The positioning pin 425 is connected to the housing. The left side of the connecting section 423 extends obliquely forward and abuts against the housing. The transition section 422 is connected to the right side of the connecting section 423 and extends backward. The pressing section 421 is connected to the rear side of the transition section 422 and extends leftward. The pressing section 421 abuts against the positioning post 310. In practical applications, both ends of the positioning pin 425 are connected to the inner top wall and inner bottom wall of the housing through hole-shaft fit, so as to position and connect the positioning pin 425 inside the housing. A straight section extending leftward is also connected to the left side of the pressing section 421, and the straight section closely adheres to the inner side wall of the housing, increasing the contact area with the inner side of the housing. The positioning pin 425 is located between the pressing section 421 and the connecting section 423 and is fitted and connected in the arc-shaped groove 424 arched by the connecting section 423. When the external force transmitted by the connecting rod 300 to the positioning post 310 presses the pressing section 421 backward, the entire elastic piece 420 can rotate around the positioning pin 425. The connecting section 423 abutting against the housing can produce elastic deformation, and the pressing section 421 abutting against the positioning post 310 will also produce elastic deformation. When the pressure on the positioning post 310 is greater than the backward elastic force of the entire elastic piece 420 on the positioning post 310, the positioning post 310 enters the card slot 112. When the external force on the positioning post 310 is removed, the elastic forces of the connecting section 423 and the pressing section 421 will push the positioning post 310 backward out of the card slot 112, so that the positioning post 310 returns to the left end of the sliding groove 111.

[0034] In the above embodiment, since the swing rod 200 rotates, if both ends of the tension spring 410 are directly fixed to the housing and the swing rod 200, in addition to deforming in the length direction of the tension spring 410, the tension spring 410 will also be subjected to torsion at the end. Thus, after long-term use, the tension spring 410 is likely to fail. Therefore, in this embodiment, a clamping block 430 is rotatably connected to both the inside of the housing and the swing rod 200. A clamping groove 431 is provided on one side of each of the two clamping blocks 430 facing each other. Clamping portions 411 are provided at both ends of the tension spring 410, and the two clamping portions 411 are respectively connected in the two clamping grooves 431 in a matching manner. The tension spring 410 is connected to the two clamping blocks 430 through the clamping portions 411 at both ends, and both clamping blocks 430 can rotate self. When in use, as the swing rod 200 rotates, the two clamping blocks 430 can also be driven to rotate. Thus, the tension spring 410 can be stretched in a straight line direction, is not easily deformed or damaged, and can better prevent the tension spring 410 from failing.

[0035] The swing rod 200 can be a rod-shaped structure. At this time, the tension spring 410 and the connecting rod 300 are both connected to one side of the swing rod 200. Since the swing rod 200 protrudes from the housing, the structures of the tension spring 410 and the connecting rod 300 connected to the swing rod 200 will be exposed. Therefore, in this embodiment, the swing rod 200 includes a top plate 210, a bottom plate 220 and a connecting frame 230. One end of the top plate 210 is rotatably connected to the inner top side of the housing, and one end of the bottom plate 220 is rotatably connected to the inner bottom side of the housing. The ends of the top plate 210 and the bottom plate 220 connected to the housing rotate along the rotation axis extending in the vertical direction. In practical applications, a sliding sleeve can be inserted between the inner top side and the inner bottom side of the housing, and the ends of the top plate 210 and the bottom plate 220 are rotatably connected to the sliding sleeve. The connecting frame 230 is connected between the top plate 210 and the bottom plate 220. Convex columns are provided on both the upper and lower sides of the connecting frame 230, and corresponding connecting holes are also provided on the top plate 210 and the bottom plate 220. Through the hole axis matching of the convex columns and the connecting holes, the mutual connection of the connecting frame 230 with the top plate 210 and the bottom plate 220 can be realized. One end of a clamping block 430 and the connecting rod 300 are both rotatably connected between the top plate 210 and the bottom plate 220. Similarly, the rotation axes of the clamping block 430 and the connecting rod 300 between the top plate 210 and the bottom plate 220 both extend in the vertical direction. The top plate 210 and the bottom plate 220 are respectively rotatably connected to the inner top side and the inner bottom side of the housing. Placing the swing rod 200 into the housing can reduce the exposure of the structure and make the overall structure more compact. At this time, the rear end of the swing rod 200 protrudes backward from the housing. During rotation, the swing rod 200 can directly rotate forward and be received into the housing. The connecting frame 230 separates and connects the top plate 210 and the bottom plate 220. Since the clamping block 430 is rotatably connected between the top plate 210 and the bottom plate 220, one end of the tension spring 410 also extends between the top plate 210 and the bottom plate 220 at this time. The top plate 210 and the bottom plate 220 are used to limit the tension spring 410 vertically, and the stability of the tension spring 410 when applying force to the swing rod 200 is improved. Similarly, one end of the connecting rod 300 is also rotatably connected between the top plate 210 and the bottom plate 220, and the top plate 210 and the bottom plate 220 can be used to limit the connecting rod 300 vertically and improve the stability when transmitting external force to the connecting rod 300.

[0036] In the above embodiments, the tension spring 410 can be quickly connected to the clamping groove 431 through the clamping portion 411. For example, the clamping portion 411 is snapped into the clamping groove 431 from the notch of the clamping groove 431. In order to further improve the assembly efficiency of the two, in this embodiment, the clamping groove 431 penetrates through the clamping block 430 in the up-down direction, the clamping portion 411 enters the clamping groove 431 in the up-down direction, the outer diameter of the clamping portion 411 gradually decreases from both ends to the middle, and both sides of the notch of the clamping groove 431 are provided with limiting blocks protruding towards the middle of the clamping portion 411. When installing the tension spring 410 onto the clamping block 430, the clamping portion 411 of the tension spring 410 is just fitted into the clamping groove 431 in the up-down direction. By using the cooperation between the limiting blocks protruding from both sides of the notch of the clamping groove 431 and the concave in the middle of the clamping portion 411, the direct escape of the tension spring 410 from the notch can be restricted. In this way, the quick positioning of the tension spring 410 can be realized, and the force on the end of the tension spring 410 during the rotation of the swing rod 200 can be enhanced, better preventing the failure of the tension spring 410.

[0037] In order to improve the smoothness when the doors and windows are closed, in this embodiment, a guide wheel 240 is rotatably connected to the rear end of the swing rod 200. The rotation axis of the guide wheel 240 extends in the up-down direction, and the guide wheel 240 protrudes backward from the rear end of the swing rod 200. When the swing rod 200 contacts the external door frame or door leaf, the guide wheel 240 abuts against the external door frame or door leaf. By using the rotation of the guide wheel 240, the friction between the door frame and the door leaf can be reduced, improving the user experience.

[0038] Structures such as the swing rod 200 and the connecting rod 300 can be directly connected to the outside of the housing. At this time, the entire movable structure will be exposed. In order to protect the movable structure, the structures such as the swing rod 200 and the connecting rod 300 can be placed inside the housing. The housing can be an integrally formed structure. In order to facilitate the assembly of the swing rod 200 and the connecting rod 300 into it, it can also be designed as a split structure. Specifically, the housing includes a top cover 110 and a bottom cover 120 connected to the bottom side of the top cover 110. The top cover 110 and the bottom cover 120 are detachably connected. For example, a downwardly extending latch 430 is provided on the top cover 110, and a hole position adapted to the shape of the latch 430 is provided on the bottom cover 120. Through the mutual cooperation of the latch 430 and the hole position, the quick connection of the top cover 110 and the bottom cover 120 can be realized. In practical applications, there are multiple latches 430 and hole positions, so that multiple-point connection is formed between the top cover 110 and the bottom cover 120 through the latches 430 and the hole positions. A cavity with an opening facing backward is formed between the top cover 110 and the bottom cover 120. One end of the swing rod 200 is rotatably connected between the top cover 110 and the bottom cover 120. Sliding grooves 111 and clamping grooves 112 are provided on both the top cover 110 and the bottom cover 120. Both the upper and lower ends of the positioning post 310 are located in the sliding grooves 111 or the clamping grooves 112. During installation, the structures such as the swing rod 200 and the positioning post 310 can be conveniently installed on the top cover 110 or the bottom cover 120 first, and then the top cover 110 and the bottom cover 120 can be combined and connected to each other, so as to realize the overall quick assembly. Both ends of the swing rod 200 are rotatably connected between the top cover 110 and the bottom cover 120. The sliding grooves 111 and clamping grooves 112 for movably limiting the positioning post 310 are also provided on the top cover 110 and the bottom cover 120, which can further improve the stability of the swing rod 200 and the positioning post 310 during movement.

[0039] A connecting ear for connecting and fixing to an external device structure can also be provided on the bottom cover 120. The connecting ear can be a right-angle structure, and a hole position for driving in a screw is provided on the connecting ear, so as to conveniently install and fix the whole on the external device structure.

[0040] For the above anti-pinch device, it can be applied to various types of doors and windows, such as swing doors, sliding windows, lifting windows, folding windows and casement windows, etc., so as to form anti-pinch doors and windows with anti-pinch function, such as Figure 4 As shown, as the first embodiment of the anti-pinch door and window, it includes a swing door frame 510, a swing door leaf 520 and the above anti-pinch device. The swing door leaf 520 is hinged inside the swing door frame 510. The housing is connected inside the swing door frame 510. The rear end of the swing rod 200 abuts against the indoor side of the swing door leaf 520.

[0041] For a side-hinged door, when it is necessary to close the side-hinged door leaf 520, rotate the side-hinged door leaf 520 to approach the side-hinged door frame 510. When the side-hinged door leaf 520 abuts against the swing rod 200, the above-mentioned rotation braking or deceleration effect on the side-hinged door leaf 520 can be achieved, thereby realizing the function of preventing pinching in the side-hinged door. In the above, the pinch prevention device is installed on the side-hinged door frame 510, and the swing rod 200 abuts against the side-hinged door leaf 520 for braking or decelerating. In actual application, the pinch prevention device can also be installed on the side-hinged door leaf 520. At this time, the swing rod 200 abuts against the side-hinged door frame 510 for braking or decelerating.

[0042] As Figure 5 shown, as the second embodiment of the pinch prevention doors and windows, it includes a sliding window frame 610, a sliding window sash 620 and the above-mentioned pinch prevention device. The sliding window sash 620 is slidably connected to the inside of the sliding window frame 610. The outer shell is connected to one side of the sliding window sash 620, and the swing rod 200 can abut against one side of the sliding window frame 610.

[0043] For a sliding window, when it is necessary to close the sliding window sash 620, push the sliding window sash 620 towards one side of the sliding window frame 610. When the swing rod 200 on the sliding window sash 620 abuts against the sliding window frame 610, the above-mentioned sliding braking or deceleration effect on the sliding window sash 620 can be achieved, thereby realizing the function of preventing pinching in the sliding window. In the above, the pinch prevention device is installed on the sliding window sash 620, and the swing rod 200 abuts against the sliding window frame 610 for braking or decelerating. In actual application, the pinch prevention device can also be installed on the sliding window frame 610. At this time, the swing rod 200 abuts against the sliding window sash 620 for braking or decelerating.

[0044] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention. These equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A pinch prevention device, characterized in that: Comprising: A housing provided with a chute (111) extending in the left - right direction, the left end of the chute (111) being connected to a forward - extending card slot (112); A swing rod (200), one end of which is rotatably connected to the housing, the other end of the swing rod (200) protruding rearward from the housing, a connecting rod (300) being rotatably connected to the swing rod (200), a positioning post (310) being connected to the connecting rod (300), and the positioning post (310) being movable within the chute (111) and the card slot (112); An elastic component having a tendency to move the positioning post (310) to the left end of the chute (111), the elastic component including a tension spring (410) and an elastic piece (420), the tension spring (410) being connected between the housing and the swing rod (200), the tension spring (410) having a tendency to rotate the swing rod (200) rearward to protrude from the housing, the elastic piece (420) being connected to the housing, the elastic piece (420) abutting against the positioning post (310) and having a tendency to press the positioning post (310) backward into the chute (111), the elastic piece (420) including a pressing section (421), a transition section (422) and a connecting section (423), the middle of the connecting section (423) arching forward to form an arc - shaped groove (424), a positioning pin (425) being inserted into the arc - shaped groove (424), the positioning pin (425) being connected to the housing, the left side of the connecting section (423) extending obliquely forward and abutting against the housing, the transition section (422) being connected to the right side of the connecting section (423) and extending rearward, the pressing section (421) being connected to the rear side of the transition section (422) and extending leftward, the pressing section (421) abutting against the positioning post (310), a guide wheel (240) being rotatably connected to the rear end of the swing rod (200), and the guide wheel (240) protruding rearward from the rear end of the swing rod (200).

2. The anti-pinch device according to claim 1, characterized in that: A clamping block (430) is rotatably connected to both the inside of the housing and the swing rod (200), clamping grooves (431) are provided on one side of the two clamping blocks (430) facing each other, and clamping portions (411) are provided at both ends of the tension spring (410), and the two clamping portions (411) are respectively connected and fitted into the two clamping grooves (431).

3. The pinch prevention device according to claim 2, wherein: The swing rod (200) includes a top plate (210), a bottom plate (220) and a connecting frame (230), one end of the top plate (210) being rotatably connected to the inner top side of the housing, one end of the bottom plate (220) being rotatably connected to the inner bottom side of the housing, the connecting frame (230) being connected between the top plate (210) and the bottom plate (220), and one of the clamping blocks (430) and one end of the connecting rod (300) are both rotatably connected between the top plate (210) and the bottom plate (220).

4. The anti-pinch device according to claim 2, characterized in that: The clamping groove (431) penetrates through the clamping block (430) in the up-and-down direction, the clamping portion (411) enters the clamping groove (431) in the up-and-down direction, the outer diameter of the clamping portion (411) gradually decreases from both ends to the middle, and both sides of the notch of the clamping groove (431) are provided with limiting blocks protruding towards the middle of the clamping portion (411).

5. The anti-pinch device according to claim 1, characterized in that: The housing includes a top cover (110) and a bottom cover (120) connected to the bottom side of the top cover (110). A cavity with an opening facing backward is formed between the top cover (110) and the bottom cover (120). One end of the swing rod (200) is rotatably connected between the top cover (110) and the bottom cover (120). The top cover (110) and the bottom cover (120) are both provided with sliding grooves (111) and clamping grooves (112), and both the upper and lower ends of the positioning column (310) are located in the sliding grooves (111) or the clamping grooves (112).

6. An anti-pinch door or window, characterized in that: It includes a flat door frame (510), a flat door leaf (520) and the pinch prevention device according to any one of claims 1 to 5. The flat door leaf (520) is hinged in the flat door frame (510), the housing is connected in the flat door frame (510), and the rear end of the swing rod (200) abuts against the indoor side of the flat door leaf (520).

7. A pinch-proof door or window, characterized in that: It includes a sliding window frame (610), a sliding window sash (620) and the pinch prevention device according to any one of claims 1 to 5. The sliding window sash (620) is slidably connected in the sliding window frame (610), the housing is connected to one side of the sliding window sash (620), and the swing rod (200) can abut against one side of the sliding window frame (610).

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