Miniaturized quick door closing anti-pinch device and door with anti-pinch function

Abstract

The utility model provides a miniaturized quick door closing anti-pinch device and a door with an anti-pinch function. The quick door closing anti-pinch device comprises a mounting box; a telescopic column is arranged in the mounting box, and a limiting part is arranged at the inner end of the telescopic column; a positioning groove is formed in the outer end of the telescopic column, and correspondingly, an elastically telescopic positioning assembly is arranged on the mounting box; an elastic rope is arranged in the mounting box, when the telescopic column is in a non-extending state, the elastic rope stores energy, and after the telescopic column breaks away from the limitation of the positioning element, the elastic rope releases energy, so that the telescopic column is quickly popped up. A door with an anti-pinch function comprises a door leaf and a door frame. A mounting groove is formed in the side edge of the door leaf, and a quick door closing anti-pinch device is arranged in the mounting groove. According to the quick door closing anti-pinch device, the specific structural design is adopted, the length size of the device is greatly reduced, the manufacturing cost is low, and industrial popularization is facilitated. The door has an anti-pinch function and has the advantage of being easy to industrialize at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of door and window finger pinching prevention, and in particular to a quick door closing finger pinching prevention device with a miniaturized design and a door with the finger pinching prevention function. Background Art

[0002] Normal door closing will not cause the hand to be pinched, and even if it is pinched, it will not cause personal injury. However, when a child closes the door forcefully or the door is closed quickly due to strong winds, the hand can be easily pinched by the door because the child is not aware of the danger or does not have time to react. In mild cases, it may cause swelling, and in severe cases, it may cause comminuted fractures.

[0003] In order to eliminate the above safety hazards, our company has developed a fast door closing anti-pinch device that uses centrifugal force to trigger protection (patent application number is 202410402096.8). The device consists of an installation box and an anti-pinch assembly. The anti-pinch assembly includes a telescopic column and a stopper for use. The stopper clamps the telescopic column. The normal closing speed will not trigger the protection mechanism. Only when the closing speed reaches the threshold will the protection mechanism be triggered to prevent the door from closing, effectively preventing the accident of pinching the hand caused by rapid door closing due to factors such as children playing and strong winds. In the anti-pinch device, the matching point of the telescopic column and the stopper is located in the installation box. In order to avoid interference between related parts, the telescopic column needs to be designed to be relatively long, which results in a larger length dimension of the anti-pinch device. On the other hand, in order to enable the telescopic column to pop out quickly after the protection mechanism is triggered, a compression spring is arranged in the installation box of the anti-pinch device. After the telescopic column breaks free from the restriction of the stopper, the compression spring releases energy and quickly pushes the telescopic column out, but this design will further increase the length dimension of the device. This anti-pinch device can be applied in two ways: installed on the door leaf or integrated inside the door leaf. During the promotion process, we found that the market is sensitive to the size of the anti-pinch device. If it is installed on the door leaf, it is difficult to promote because of its large size and does not conform to people's habitual aesthetics. If it is integrated inside the door leaf, due to its large length, it will interfere with the skeleton inside the door leaf. The manufacturer of the door needs to change the original door leaf frame design, which also has the problem of difficulty in promotion. In addition, we also found that the manufacturing cost of the anti-pinch device is also an important factor in determining whether it can be successfully promoted. Therefore, it is necessary to improve the structure of the device, reduce its length while ensuring product performance, and reduce manufacturing costs to facilitate industrial promotion. Utility Model Content

[0004] In view of the deficiencies existing in the prior art, the present application provides a miniaturized quick-closing door anti-pinch device. The quick-closing door anti-pinch device of the present application adopts a specific structural design. On the premise of having the anti-pinch function, it has the advantage of a small length. When it is integrated inside the door leaf for use, there is no need to change the frame structure inside the door leaf, and it is easy to implement. If it is installed on the surface of the door leaf for use, due to its small size, it is more in line with people's habitual aesthetics and is less likely to attract attention, thus being more easily accepted by the market; in addition, the specific structure determines that it also has the characteristic of low manufacturing cost. Correspondingly, the present application also provides a door with an anti-pinch function, which has the advantage of being easy to industrialize while having the anti-pinch function.

[0005] For the anti-pinch device, the technical solution of this application is:

[0006] A miniaturized quick-door closing anti-pinch device comprises an installation box, which is assembled from a box body and a box cover; a slidable telescopic column is arranged in the installation box, and the telescopic column can be extended from a channel hole on the side of the installation box; in a non-extended state, the outer end of the telescopic column is located in the channel hole; a limiting portion is arranged at the inner end of the telescopic column, and the limiting portion is used to prevent the telescopic column from detaching from the installation box after being extended; a positioning groove is arranged at the outer end of the telescopic column, and correspondingly, an elastically retractable positioning assembly is arranged on the installation box; when the telescopic column is in a non-extended state, the positioning element in the positioning assembly cooperates with the positioning groove to position the telescopic column; when the axial external force applied to the telescopic column exceeds a threshold value, the telescopic column can break free from the restriction of the positioning element and extend from the channel hole; an elastic rope is arranged in the installation box, and when the telescopic column is in a non-extended state, the elastic rope stores energy, and after the telescopic column breaks free from the restriction of the positioning element, the elastic rope releases energy, so that the telescopic column is quickly ejected.

[0007] Compared with the prior art, in the fast-closing anti-pinch device for doors of the present application, the positioning groove on the telescopic column for cooperating with the positioning element is located at the outer end thereof, and the inner end is provided with a limiting portion to prevent it from being separated from the installation box. The matching point between the positioning element and the telescopic column is located in the channel hole, rather than inside the installation box, and there is no possibility of interference with the limiting portion, thereby maximally shortening the length of the telescopic column, so that the length dimension of the anti-pinch device is greatly reduced. At the same time, by providing an elastic rope, the telescopic column can be quickly ejected, thereby ensuring the reliability of the device, and the elastic rope does not occupy additional space in the length direction of the installation box. Space, thereby will not cause the increase of the length of the device; if the anti-pinch device is integrated and installed inside the door leaf for use, its length can be designed to be consistent with the length of the door lock body, and there is no need to change the frame structure inside the door leaf. It is easy to implement and conducive to promotion. If it is installed on the surface of the door leaf for use, due to its smaller size, it is more in line with people's habitual aesthetics and is less likely to attract attention, thus being more easily accepted by the market, which is also conducive to promotion. In addition, the structure of the fast-closing anti-pinch device of the present application has a lower material cost for manufacturing, which determines that it also has a price advantage and is more easily accepted by the market.

[0008] As an optimization, in the aforementioned miniaturized quick-close door anti-pinch device, the elastic rope is mounted on the limit portion of the telescopic column, and its two ends are connected to the front end of the installation box. When the elastic rope is arranged in this way, the rope body of the elastic rope is longer and has a greater elastic deformation capacity, and is not prone to failure due to long-term stretching, which can improve the reliability of the device.

[0009] Furthermore, the front part of the installation box is provided with a pair of rope holes, and the two ends of the elastic rope are respectively passed through the corresponding rope holes and the position is limited by the knot formed by tying. Therefore, during assembly, only the ends of the elastic rope need to be knotted, which has the advantage of being easy to implement.

[0010] As an optimization, in the aforementioned miniaturized quick-closing anti-pinch device, the positioning assembly includes a rolling ball A, a pin, a compression spring and a clamping screw arranged in sequence; when the telescopic column is not extended, the rolling ball A is located in the positioning groove to position the telescopic column. Compared with the form of sliding friction, the use of the rolling ball A as a positioning element has a smaller rolling friction resistance, so it is not easy to get stuck, which improves the reliability of the device.

[0011] Furthermore, a B ball groove is provided in the hole wall of the channel hole, and a B rolling ball is provided in the B ball groove; the B rolling ball forms a rolling pair with the telescopic column; the A rolling ball and the B rolling ball act on two opposite surfaces of the telescopic column respectively. Thus, the A rolling ball and the B rolling ball are used in combination, so that the telescopic column is in a suspended state relative to the channel hole, so that the friction resistance when extending is further reduced.

[0012] Furthermore, two opposite sides of the limiting part are provided with C ball grooves, in which C rolling balls are provided; the C rolling balls and the inner wall of the installation box form a rolling pair. The C rolling balls are provided on the limiting part, so that the friction resistance between the inner end of the telescopic column and the installation box is greatly reduced, thereby further reducing the risk of the telescopic column getting stuck.

[0013] Furthermore, in the circumferential direction of the telescopic column, the C ball is spaced 90° from the A ball. Thus, the telescopic column is lifted up by the balls in four directions, and there is no sliding friction between the telescopic column and the mounting box, which minimizes the risk of the telescopic column getting stuck.

[0014] As an optimization, in the aforementioned miniaturized quick-closing anti-pinch device, the box cover is provided with a door stopper mounting hole for mounting a door stopper. Thus, the door stopper of the door stopper can be mounted on the box cover of the anti-pinch device (in the prior art, the door stopper is mounted on the door leaf and used in conjunction with a door stopper rod mounted on the wall), so that the anti-pinch device only needs to be mounted at the position where the door stopper was originally mounted and then the door stopper is installed, which is more easily accepted by the market.

[0015] As an optimization, in the aforementioned miniaturized fast-closing door anti-pinch device, the bottom of the box body is provided with an external rib plate, and the external rib plate is provided with an A mounting hole for fixing it on the door leaf. During installation, the installation box can be fixed with screws, which has good reliability and is easy to install.

[0016] For the door, this application provides the following technical solutions:

[0017] A door with an anti-pinch function comprises a door leaf and a door frame; a mounting groove is provided on the side of the door leaf, and the aforementioned fast door closing anti-pinch device of the present application is provided in the mounting groove; an internal rib plate is provided on the front of the mounting box, and a B mounting hole is provided on the internal rib plate, and the mounting box is fixedly connected to the door leaf by screws provided in the B mounting hole; when the centrifugal force generated by closing the door does not reach a threshold value, the telescopic column is restricted by a positioning element and will not extend from a channel hole; after the centrifugal force generated by closing the door reaches a threshold value, the telescopic column can break free from the restriction of the positioning element and extend from the channel hole; a blocking member is provided on the door frame, which can interfere with the extended telescopic column, so that the gap between the door leaf and the door frame can accommodate a person's hand, thereby playing an anti-pinch function.

[0018] Compared with the prior art, the door of the present application integrates a quick door closing anti-pinch device inside the door leaf, and a matching blocking member is provided on the door frame. After the telescopic column is extended, the blocking member will interfere with the telescopic column, thereby preventing the door from closing, effectively avoiding hand pinching accidents. At the same time, since the structure of the quick door closing anti-pinch device has been optimized, its length dimension can be designed to be smaller, so that the frame structure inside the door leaf does not need to be changed, and only a mounting groove needs to be provided on the side of the door leaf. The implementation difficulty is low, which is conducive to industrial promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic diagram of the structure of the quick door closing anti-pinch device in the first embodiment when in use (without the door stopper installed);

[0020] Figure 2 is a schematic structural diagram of a door equipped with a quick anti-pinch device in Embodiment 1;

[0021] Figure 3 yes Figure 2 A front view of the door shown in FIG.

[0022] Figure 4 1 is a schematic diagram of the structure of the fast door closing anti-pinch device in the first embodiment (the telescopic column is not extended);

[0023] Figure 5 yes Figure 4 Front view of the anti-pinch device for fast door closing;

[0024] Figure 6 yes Figure 5 A-direction sectional view of the anti-pinch device for fast door closing;

[0025] Figure 7 yes Figure 5 Sectional view of the anti-pinch device for fast door closing in the direction of B;

[0026] Figure 8 yes Figure 5 Structural view of the middle fast-closing door anti-pinch device after removing the box cover and positioning components;

[0027] Fig. 9 is a schematic structural diagram of the rapid anti-pinch device in the second embodiment (the telescopic column is not extended);

[0028] Fig.10 It is a schematic diagram of the structure of the door with the finger-pinch prevention function in the second embodiment (the telescopic column is extended to prevent the door from closing).

[0029] Figure markings: 1-installation box, 101-box body, 102-box cover, 103-rope threading hole, 104-B ball groove, 105-door stopper mounting hole, 106-external rib plate, 107-A mounting hole, 108-inner rib plate, 109-B mounting hole; 2-telescopic column, 201-limiting part, 202-positioning groove; 3-positioning assembly, 301-A rolling ball, 302-pin column, 303-compression spring, 304-tensioning screw; 4-door leaf; 5-door frame; 6-elastic rope, 601-knot; 7-B rolling ball; 8-C rolling ball; 9-blocking member. DETAILED DESCRIPTION

[0030] The present application is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present application.

[0031] Example 1 (see Figures 1 to 8 ):

[0032] This embodiment provides a fast door closing anti-pinch device and a door with the device installed. The door is an inward opening door, comprising a door leaf 4 and a door frame 5; the inner surface of the door leaf 4 is provided with the fast door closing anti-pinch device; the door frame 5 is provided with a blocking member 9 used in conjunction with the fast door closing anti-pinch device.

[0033] In this embodiment, the fast door closing anti-pinch device includes an installation box 1, which is assembled from a box body 101 and a box cover 102; a slidable telescopic column 2 is provided in the installation box 1, and the telescopic column 2 can be extended from a channel hole on the side of the installation box 1; in the unextended state, the outer end of the telescopic column 2 is located in the channel hole; a limiting portion 201 is provided at the inner end of the telescopic column 2, and the limiting portion 201 is used to prevent the telescopic column 2 from detaching from the installation box 1 after being extended; a positioning groove 202 is provided at the outer end of the telescopic column 2, and correspondingly, The installation box 1 is provided with an elastically retractable positioning assembly 3; when the telescopic column is in the unextended state, the positioning element in the positioning assembly 3 cooperates with the positioning groove 202 to position the telescopic column 2; when the axial external force on the telescopic column 2 exceeds the threshold, the telescopic column 2 can break free from the restriction of the positioning element and extend from the channel hole; the installation box 1 is provided with an elastic rope 6, when the telescopic column 2 is in the unextended state, the elastic rope 6 stores energy, and after the telescopic column 2 breaks free from the restriction of the positioning element, the elastic rope 6 releases energy, so that the telescopic column 2 is quickly ejected. The above structural design of this embodiment greatly reduces the length of the anti-pinch device.

[0034] In this embodiment, the elastic cord 6 is mounted on the limiting portion 201 of the telescopic column 2, and its two ends are connected to the front end of the installation box 1. Compared with the method of connecting the two ends of the elastic cord 6 to the installation box 1 and the telescopic column 2 respectively, in this embodiment, the elastic cord 6 is longer and is not prone to failure due to long-term stretching.

[0035] In this embodiment, the front end of the installation box 1 is provided with a pair of rope holes 103, and the two ends of the elastic rope 6 are respectively passed through the corresponding rope holes 103 and the position is limited by the knot 601 formed by tying the elastic rope 6. The position is limited by tying the elastic rope 6, which is easy to implement.

[0036] In this embodiment, the rope threading hole 103 is a stepped hole, and the knot 601 is hidden inside the rope threading hole 103, and cooperates with the stepped surface of the stepped hole to form a limit. Compared with the way that the knot 601 is exposed, this hidden design is more beautiful and easier to be recognized by consumers. When implementing the utility model, a decorative cover can also be configured to cover the rope threading hole 103.

[0037] In this embodiment, small holes are respectively provided on both sides of the limiting portion 201 of the telescopic column 2, and the elastic rope 6 passes through the two small holes in sequence and is mounted on the limiting portion 201. This arrangement can prevent the elastic rope 6 from slipping, further improving the reliability of the device.

[0038] In this embodiment, the positioning assembly 3 includes a rolling ball 301, a pin 302, a compression spring 303 and a clamping screw 304 arranged in sequence; when the telescopic column is not extended, the rolling ball 301 is located in the positioning groove 202 to position the telescopic column 2. There is rolling friction between the positioning element and the telescopic column 2, and the friction resistance is small. The pressure of the rolling ball 301 on the telescopic column 2 can be adjusted by the clamping screw 304 to adjust the critical value of the closing speed for triggering protection (threshold for triggering protection) to meet the needs of different customers. The coordinated use of the elastic rope 6 and the positioning assembly 3 can theoretically design the threshold to any desired value.

[0039] In this embodiment, a B ball groove 104 is provided in the hole wall of the channel hole, and a B rolling ball 7 is provided in the B ball groove 104; the B rolling ball 7 forms a rolling pair with the telescopic column 2; the A rolling ball 301 and the B rolling ball 7 act on two opposite surfaces of the telescopic column 2 respectively. Thus, the two opposite surfaces of the telescopic column 2 cooperate with the rolling ball to form a ball pair, and the friction resistance is further reduced.

[0040] In this embodiment, two opposite sides of the position-limiting portion 201 are provided with C ball grooves 203, and C rolling balls 8 are provided in the C ball grooves 203; the C rolling balls 8 form a rolling pair with the inner wall of the installation box 1. Similarly, the provision of the C rolling balls also plays a role in reducing friction resistance. And this structure has the advantage of being easy to manufacture.

[0041] In this embodiment, the C rolling ball 8 is spaced 90 degrees from the A rolling ball 301 in the circumferential direction of the telescopic column 2. Thus, all four circumferential surfaces of the telescopic column 2 are matched with the rolling balls, and there is no sliding friction at all.

[0042] In this embodiment, the inner wall of the installation box 1 is provided with a linear track groove, and the C rolling ball 8 is located in the linear track groove.

[0043] In this embodiment, the bottom of the box body 101 is provided with an external rib plate 106, and the external rib plate 106 is provided with an A mounting hole 107 for fixing it to the door leaf. The box body 1 is fixed to the door leaf 4 by screws.

[0044] In this embodiment, the box cover 102 is provided with a door stopper mounting hole 105 for mounting a door stopper seat, and the door stopper seat is mounted on the box cover 102. With this design, the door closing anti-pinch device and the door stopper can be bundled for sale, which is conducive to market promotion.

[0045] When in use, when the door closing speed reaches the designed threshold, the telescopic column 2 breaks free from the restriction of the positioning element under the action of centrifugal force, and quickly extends under the action of the elastic rope 6, collides with the blocking member 9, and stops the door from closing. After the telescopic column 2 is extended, the telescopic column 2 can be manually pressed back into the installation box 1 to reset.

[0046] Example 2 (see Fig. 9 and Fig.10 ):

[0047] This embodiment provides a door with a hand-pinch prevention function, including a door leaf 4 and a door frame 5. Different from the first embodiment, in this embodiment, the door is an anti-theft door, and the door opening form is an outward opening door. The side of the door leaf 4 is provided with a mounting groove, and a fast door closing hand-pinch prevention device is provided in the mounting groove. When the door closing speed reaches the designed threshold, the fast door closing hand-pinch prevention device will trigger a protection mechanism to prevent the door from closing, thereby avoiding a hand-pinch accident.

[0048] Specifically, in this embodiment, an internal rib plate 108 is provided at the front of the installation box 1, and a B installation hole 109 is provided on the internal rib plate 108. The installation box 1 is fixedly connected to the door leaf by screws provided in the B installation hole 109; when the centrifugal force generated by closing the door does not reach the threshold, the telescopic column 2 is restricted by the positioning element and will not extend from the channel hole; after the centrifugal force generated by closing the door reaches the threshold, the telescopic column 2 can break free from the restriction of the positioning element and extend from the channel hole; a blocking member 9 is provided on the door frame 5 (the blocking member 9 shown in the accompanying drawings is only an engineering sample that meets the functional requirements. When the utility model is implemented, the blocking member 9 can be shaped and designed to make it more beautiful), which can interfere with the extended telescopic column 2, so that the gap between the door leaf 4 and the door frame 5 can accommodate a person's hand, thereby preventing the hand from being pinched.

[0049] Specifically, in this embodiment, the door leaf 4 of the anti-theft door is composed of a frame and a panel wrapped outside the frame. The lock body of the door lock is installed in the groove on the side of the door leaf. After installation, the lock body just contacts the frame material to form a limit, making the structure stable and reliable (this is a conventional design). The installation box of the fast closing door anti-pinch device has the same length as the lock body. After installation, it just contacts the frame material to form a limit (of course, it can be designed to be smaller, but it contacts the frame material to make the structure more reliable).

[0050] The fast closing anti-pinch device of the present application has two application modes, as in the first embodiment and the second embodiment. The mode of integration inside the door leaf needs to be recognized by the manufacturer of the finished door, while the mode of installation on the upper surface of the door needs to resonate with the concept of the terminal consumer. From the practical perspective of industrialization, the second embodiment is the best embodiment and is easier to promote industrialization.

[0051] It should be pointed out that the fast door closing anti-pinch device of the present invention is not limited to the specific applications in the above two embodiments. For example, for an inward-opening door, it can also be arranged on the outer surface of the door leaf 4. When it is installed on the outer side of the door leaf 4, it cannot be used in combination with the door stopper, but in this case, there is no need to set the matching blocking member 9.

[0052] The above general description of the invention involved in this application and the description of its specific implementation methods should not be understood as limiting the technical solutions of the invention. Based on the disclosure of this application, those skilled in the art can, without violating the constituent elements of the invention involved, add, reduce or combine the disclosed technical features in the above general description or / and specific implementation methods (including examples) to form other technical solutions within the scope of protection of this application.

Claims

1. Miniaturized quick-closing door anti-pinch device, characterized by: The invention comprises an installation box (1), wherein the installation box (1) is assembled from a box body (101) and a box cover (102); a slidable telescopic column (2) is provided inside the installation box (1), and the telescopic column (2) can be extended from a channel hole on the side of the installation box (1); in a non-extended state, the outer end of the telescopic column (2) is located in the channel hole; a limiting portion (201) is provided at the inner end of the telescopic column (2), and the limiting portion (201) is used to prevent the telescopic column (2) from detaching from the installation box (1) after being extended; The outer end of the telescopic column (2) is provided with a positioning groove (202), and correspondingly, the installation box (1) is provided with an elastically retractable positioning component (3); when the telescopic column is in a non-extended state, the positioning element in the positioning component (3) cooperates with the positioning groove (202) to position the telescopic column (2); when the axial external force applied to the telescopic column (2) exceeds a threshold value, the telescopic column (2) can break free from the restriction of the positioning element and extend from the channel hole; An elastic rope (6) is provided in the installation box (1). When the telescopic column (2) is in a non-extended state, the elastic rope (6) stores energy. After the telescopic column (2) breaks free from the restriction of the positioning element, the elastic rope (6) releases the energy, causing the telescopic column (2) to be quickly ejected.

2. The miniaturized fast door closing anti-pinch device according to claim 1 is characterized in that: The elastic rope (6) is mounted on the limiting portion (201) of the telescopic column (2), and its two ends are connected to the front end of the installation box (1).

3. The miniaturized fast door closing anti-pinch device according to claim 2 is characterized in that: The front end of the installation box (1) is provided with rope threading holes (103) in pairs, and the two ends of the elastic rope (6) are respectively passed through the corresponding rope threading holes (103) and the position is limited by knots (601) formed by tying a knot.

4. The miniaturized fast door closing anti-pinch device according to claim 1 is characterized in that: The positioning assembly (3) comprises a rolling ball (301), a pin (302), a compression spring (303) and a clamping screw (304) which are arranged in sequence; when the telescopic column is in an unextended state, the rolling ball (301) is located in the positioning groove (202) to position the telescopic column (2).

5. The miniaturized fast door closing anti-pinch device according to claim 4 is characterized in that: A B ball groove (104) is provided in the hole wall of the channel hole, and a B rolling ball (7) is provided in the B ball groove (104); the B rolling ball (7) forms a rolling pair with the telescopic column (2); and the A rolling ball (301) and the B rolling ball (7) act on two opposite surfaces of the telescopic column (2) respectively.

6. The miniaturized fast door closing anti-pinch device according to claim 5 is characterized in that: C ball grooves (203) are respectively provided on two opposite side surfaces of the limiting portion (201), and a C rolling ball (8) is provided in the C ball groove (203); the C rolling ball (8) forms a rolling pair with the inner wall of the installation box (1).

7. The miniaturized fast door closing anti-pinch device according to claim 6 is characterized in that: In the circumferential direction of the telescopic column (2), the C rolling ball (8) and the A rolling ball (301) are spaced at an angle of 90°.

8. The miniaturized fast door closing anti-pinch device according to claim 1 is characterized in that: The box cover (102) is provided with a door stopper mounting hole (105) for mounting a door stopper seat.

9. The miniaturized fast door closing anti-pinch device according to claim 1 is characterized in that: An external rib plate (106) is provided at the bottom of the box body (101), and an A mounting hole (107) for fixing the external rib plate (106) on the door leaf is provided.

10. A door with a finger-pinch prevention function, comprising a door leaf (4) and a door frame (5); characterized in that: The side of the door leaf (4) is provided with a mounting groove, and the mounting groove is provided with a fast door closing anti-pinch device as claimed in any one of claims 1 to 7; the front of the installation box (1) is provided with an internal rib plate (108), and the internal rib plate (108) is provided with a B mounting hole (109), and the installation box (1) is fixedly connected to the door leaf through a screw provided in the B mounting hole (109); when the centrifugal force generated by closing the door does not reach the threshold, the telescopic column (2) is restricted by the positioning element and will not extend from the channel hole; after the centrifugal force generated by closing the door reaches the threshold, the telescopic column (2) can break free from the restriction of the positioning element and extend from the channel hole; the door frame (5) is provided with a blocking member (9) that can interfere with the extended telescopic column (2), so that the gap between the door leaf (4) and the door frame (5) can accommodate a person's hand, thereby playing an anti-pinch effect.

Images