Anti-pinch door

Abstract

The invention discloses an anti-pinch door, and relates to the technical field of door anti-pinch safety. The anti-pinch door comprises a door frame, a door leaf, an anti-pinch strip, a positioning seat, a positioning shaft, an offset rocker arm, a door shaft support, a door shaft, a q-shaped support arm and a coupling mechanism, the positioning seat, the door shaft support, the door shaft and the coupling mechanism adopt an embedded invisible anti-pinch integrated design, the sealing anti-pinch strip is arranged between the door frame and the door leaf, the end face of one side, hinged to the door shaft, of the door leaf is a plane, and the end face of the other side is a plane. The outer corner of the door is provided with an anti-pinch R20-R80mm convex arc which is ingeniously combined with the door frame to form a perfect and safe novel anti-pinch structure, a constant-value door slot design (less than or equal to 3mm) is adopted, fingers cannot be inserted into the door slot on the side of the rotating shaft when the door is opened and closed, the technical problem of a traditional door clamp is thoroughly solved, and the door clamp has wide market prospect and social benefit.

Description

Technical Field

[0001] The invention belongs to the technical field of door finger pinching prevention safety, and in particular relates to a finger pinching prevention door. Background Art

[0002] With the continuous development of social economy, the improvement of living standards, and the continuous improvement of living conditions, people have begun to have higher and higher requirements for the safety performance of home doors. At present, traditional doors adopt a square right-angle plane structure. The door frame and the door leaf are hinged with hinges or external door shafts. When opening and closing the door, a gap of about 15mm will appear on the side of the door frame and the door leaf shaft. When turning, the straight edges and corners of the door leaf will rotate and bite like mechanical gears. When children or the elderly accidentally put their fingers in this gap, it will cause hand injuries when closing the door, which may cause minor skin and bone fractures, or even fractures and breakages, causing disability. Because its original design structure is unreasonable, it has safety defects that cannot be eliminated. Therefore, it is particularly important to develop a beautiful and safe anti-pinch door to completely solve the safety hazards of traditional doors. Summary of the invention

[0003] The present invention provides a finger-pinch-proof door to solve the above-mentioned defects and potential safety hazards existing in the traditional door technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-pinch door, comprising a door frame, a door leaf, an anti-pinch strip, a positioning seat, a positioning shaft, an offset rocker arm, a door shaft bracket, a door shaft, a Q-shaped support arm and a connecting mechanism, wherein a positioning seat is provided on the upper side of the door frame, a cylindrical shaft sleeve connected thereto is provided on the positioning seat, a positioning shaft is provided in the hole of the cylindrical shaft sleeve, the positioning shaft drives the offset rocker arm to move axially and is hinged to the connecting mechanism through a positioning screw, a positioning groove with a door shaft bracket embedded therein is provided at the bottom of the vertical edge of the door frame, and a cylindrical shaft sleeve is provided on the positioning seat. An axis hole, in which a door axis connected to the door axis is arranged as a whole, the door axis bracket is fixed to the door frame with screws, the end face of the door leaf on one side of the hinged door axis is set as a plane, an anti-pinch R20-R80mm convex arc is provided at the outer corner, a positioning hole groove suitable for accommodating a connecting mechanism is provided at the center of the upper end face of the convex arc, a positioning hole groove suitable for accommodating a Q-shaped support arm is provided at the center of the lower end face of the convex arc, a tapered rolling bearing is provided in the axis hole of the Q-shaped support arm and is hinged to the door axis, and a sealing anti-pinch strip is provided between the door frame and the door leaf.

[0005] The anti-pinch door is a wooden door, the door frame is set to three sides, the door frame and door leaf are spliced ​​by solid wood, the inner angle of the side of the door leaf hinged to the door axis is set to an oblique angle, the inner angle of the opening side of the door leaf is set to an oblique angle, and the positioning seat is embedded in the prefabricated hole groove from the bottom of the upper door frame and fixed with screws.

[0006] The anti-pinch door is a steel door, the door frame is set to have four sides, the door frame and door leaf are formed by die-stamping, bending and welding of steel plates, a raised door stop is provided on the bottom edge of the door frame, the inner angle of the door leaf on the side where the door axis is hinged is set to be a rounded corner, the inner angle of the opening side of the door leaf is set to be a rounded corner, and the positioning seat is inserted from the top of the upper door frame into the prefabricated hole groove and welded and fixed.

[0007] The anti-pinch door is an aluminum-wood door, the door frame is set to three sides, the door frame and door leaf are made of aluminum profiles embedded in solid wood boards, the inner angle of the door leaf on the side where the door axis is hinged is set to an oblique angle, and the inner angle of the open side of the door leaf is set to a right angle, and the positioning seat is embedded in the prefabricated hole groove on the top of the upper door frame and riveted and fixed.

[0008] The positioning seat is C-shaped, and a cylindrical sleeve is provided on the positioning seat. An internal spline is provided in the cylindrical sleeve, and the internal spline is slidably engaged with the external spline of the hollow positioning shaft. The side of the hollow positioning shaft is provided with an axial hole that can accommodate an offset rocker arm, and an internal spline is provided in the inner hole of the hollow positioning shaft. The internal spline of the hollow positioning shaft is engaged and hinged with the external spline at the end of the main shaft of the connecting mechanism.

[0009] The positioning seat is Q-shaped, and is provided with an outwardly convex arc-shaped flange on the positioning seat, and a cylindrical sleeve is provided on the outwardly convex arc-shaped flange, and a smooth shaft hole is provided in the cylindrical sleeve, and a solid smooth positioning shaft is provided in the smooth shaft hole, and an shaft hole that can accommodate an offset rocker arm is provided on the side of the solid smooth positioning shaft, and the smooth positioning shaft is meshed and hinged with the inner hole of the deep groove bearing of the connecting mechanism.

[0010] The positioning seat is arc-shaped, one end of the positioning seat is set to be arc-shaped, the other end of the positioning seat is provided with an arc-shaped flange, a cylindrical sleeve is provided on the arc-shaped flange, a rounded rectangular shaft hole is provided in the cylindrical sleeve, a stepped rounded rectangular positioning shaft is provided in the rounded rectangular shaft hole, the side of the rectangular positioning shaft is provided with an shaft hole that can accommodate an offset rocker arm, and the lower end of the rectangular positioning shaft is provided with an external hexagonal positioning shaft connected to it as a whole, which is hinged with the internal hexagonal meshing of the end of the main shaft of the connecting mechanism.

[0011] The connecting mechanism is self-closing, including a fixed arm, a shell, a main shaft, a spiral cam, a valve body, a spring and an end cover. The fixed arm is roll-riveted to the upper part of the shell, and a mounting screw hole is provided on the fixed arm. A bearing support for the main shaft is provided in the shaft hole of the fixed arm. A rectangular spline is provided at the upper end of the main shaft, and a sealing groove is provided in the shaft hole. A rotating anti-seepage seal is provided in the sealing groove. The end cover is roll-riveted to the lower part of the shell, and an involute spline is provided at the lower end of the main shaft to engage and hinge with the spline in the spiral cam. A spring is sleeved on the main shaft, and a roller is provided in the spiral groove of the spiral cam. A support sleeve, a roller and a spacer are provided on the roller. Both ends of the roller are supported in the shaft hole set on the skirt of the end cover. A valve body is provided on the spiral cam, and an elastic one-way valve is provided on the valve body, and a speed change valve is provided on the valve body.

[0012] The connecting mechanism is of free type, comprising a fixed support arm and a deep groove bearing. The fixed support arm is provided with a bearing seat, and the bearing seat is provided with a deep groove bearing.

[0013] The connecting mechanism is of electronically controlled intelligent type, including a fixed support arm, a main shaft, a servo motor, a micro-servo driver, an intelligent controller, a microwave infrared sensor, a humanoid image sensor and a visual anti-pinch sensor. The main shaft is arranged in the shaft hole of the fixed support arm and supported by a bearing. The lower end of the main shaft is connected to the servo motor, and the servo motor is controlled by the micro-servo driver. The upper end of the main shaft is provided with a hexagonal groove. The microwave infrared sensor, the humanoid image sensor, the visual anti-pinch sensor and the intelligent controller are wirelessly connected.

[0014] Beneficial effects of the present invention: The anti-pinch door provided by the present invention comprises a door frame, a door leaf, an anti-pinch strip, a positioning seat, a positioning shaft, an offset rocker arm, a door shaft bracket, a door shaft, a Q-shaped support arm and a connecting mechanism. The positioning seat, the door shaft bracket, the door shaft and the connecting mechanism adopt an embedded invisible anti-pinch integrated design. A sealing anti-pinch strip is provided between the door frame and the door leaf. The end face of the door leaf on one side of the hinged door shaft is set as a plane, and an anti-pinch R20-R80mm convex arc is provided at the outer corner, which is cleverly combined with the door frame to form a perfect and safe anti-pinch new structure. The constant door gap design (≤3mm) prevents fingers from being inserted into the door gap on the rotating shaft side when opening and closing the door, which completely solves the technical problems of traditional door pinching and has broad market prospects and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the alternating positions of the finger pinch prevention door structure of the present invention; Figure 2 This is a schematic elevation diagram of the anti-pinch door of the present invention; Figure 3 This is an exploded schematic diagram of the anti-pinch wooden door of the present invention; Figure 4This is a schematic diagram of an exploded view of the finger-pinch-proof steel door of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the anti-pinch aluminum-wood door of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the door shaft bracket of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the C-shaped positioning seat of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the Q-shaped positioning seat of the present invention; Fig. 9 This is a schematic diagram of the three-dimensional structure of the arc-shaped positioning seat of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the self-closing connection mechanism of the present invention; Fig.11 It is a cross-sectional schematic diagram of the built-in valve body of the present invention; Fig.12 It is a cross-sectional schematic diagram of the external valve body of the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the free-type connection mechanism of the present invention; In the figure: 1. door frame; 2. door leaf; 3. anti-pinch strip; 4. positioning seat; 5. positioning shaft; 6. positioning screw; 7. offset rocker arm; 8. door shaft bracket; 9. flange shaft hole; 10. door shaft; 11. Q-shaped support arm; 12. plane; 13. convex arc; 14. tapered rolling bearing; 15. deep groove bearing; 16. adjustment pad; 17. bevel; 18. right angle; 19. fillet; 20. hole groove; 21. groove; 22. main shaft; 23. valve body; 24. fixed support arm; 25. shell; 26. end cover; 27. spiral cam; 28. spherical check valve; 29. ​​conical check valve; 30. arc flange. DETAILED DESCRIPTION

[0016] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the present invention will be further described below in conjunction with the drawings in the embodiments of the present invention and in conjunction with the embodiments.

[0017] like Figure 1-6As shown, a finger-pinch prevention door comprises a door frame 1, a door leaf 2, an anti-pinch strip 3, a positioning seat 4, a positioning shaft 5, an offset rocker arm 7, a door shaft bracket 8, a door shaft 10, a Q-shaped support arm 11 and a connecting mechanism. The door frame 1 is provided with a positioning seat 4 on the upper side, and a cylindrical shaft sleeve is provided on the positioning seat 4 and is connected thereto as an integral part. A positioning shaft 5 is provided in the cylindrical shaft sleeve hole, and the positioning shaft 5 drives the offset rocker arm 7 to move axially and is hinged to the connecting mechanism through a positioning screw 6. A positioning groove 21 with a door shaft bracket 8 embedded therein is provided at the bottom of the vertical side of the door frame 1, and a flange shaft hole 9 is provided on the door shaft bracket 8, and a The door shaft 10, the door shaft bracket 8 is provided with an adjustment pad 16, the door shaft bracket 8 is fixed to the door frame 1 with screws, the end face of the door leaf 2 on one side of the hinged door shaft 10 is set as a plane 12, and an anti-pinch R20-R80mm convex arc 13 is provided at the outer corner, and a positioning hole groove 20 suitable for accommodating a connecting mechanism is provided at the center of the upper end face of the convex arc 13, and a positioning hole groove 20 suitable for accommodating a q-shaped support arm 11 is provided at the center of the lower end face of the convex arc 13, a tapered rolling bearing 14 is provided in the axial hole of the q-shaped support arm 11 and is hinged to the door shaft 10, and a sealing anti-pinch strip 3 is provided between the door frame 1 and the door leaf 2.

[0018] like Figure 3 As shown, the anti-pinch door is a wooden door, the door frame 1 is set to three sides, the door frame 1 and the door leaf 2 are spliced ​​by solid wood, the inner angle of the door leaf 2 on the side of the hinged door axis 10 is set to bevel angle 17, the inner angle of the opening side of the door leaf 2 is set to bevel angle 17, and the positioning seat 4 is embedded in the prefabricated hole groove 20 from the bottom of the upper door frame 1 and fixed with screws.

[0019] like Figure 4 As shown, the anti-pinch door is a steel door, the door frame 1 is set to have four sides, the door frame 1 and the door leaf 2 are formed by die-stamping, bending and welding of steel plates, the bottom edge of the door frame 1 is provided with a raised door stop, the inner angle of the door leaf 2 on the side of the hinged door shaft 10 is set to be a rounded corner 19, the inner angle of the opening side of the door leaf 2 is set to be a rounded corner 19, and the positioning seat 4 is inserted from the top of the upper door frame 1 into the prefabricated hole groove 20 and welded and fixed.

[0020] like Figure 5 As shown, the anti-pinch door is an aluminum-wood door, the door frame 1 is set to three sides, the door frame 1 and the door leaf 2 are made of aluminum profiles embedded in solid wood boards, the inner angle of the door leaf 2 on the side of the hinged door axis 10 is set to an oblique angle 17, and the inner angle of the opening side of the door leaf 2 is set to a right angle 18, and the positioning seat 4 is embedded in the prefabricated hole groove 20 from the top of the upper door frame 1 and riveted and fixed.

[0021] like Figure 7As shown, the positioning seat 4 is C-shaped, and a cylindrical sleeve is provided on the positioning seat 4. An internal spline is provided in the cylindrical sleeve, and the internal spline is slidably engaged with the external spline of the hollow positioning shaft 5. The side of the hollow positioning shaft 5 is provided with an axial hole that can accommodate the offset rocker arm 7, and an internal spline is provided in the inner hole of the hollow positioning shaft 5. The internal spline of the hollow positioning shaft 5 is engaged and hinged with the external spline at the end of the main shaft 22 of the connecting mechanism.

[0022] like Figure 8 As shown, the positioning seat 4 is Q-shaped, and an outwardly convex arc-shaped flange 30 is provided on the positioning seat 4, and a cylindrical sleeve is provided on the outwardly convex arc-shaped flange 30, and a smooth shaft hole is provided in the cylindrical sleeve, and a solid smooth positioning shaft 5 is provided in the smooth shaft hole, and an shaft hole for accommodating an offset rocker arm 7 is provided on the side of the solid smooth positioning shaft 5, and the smooth positioning shaft 5 is meshed and hinged with the inner hole of the deep groove bearing 15 of the connecting mechanism.

[0023] like Fig. 9 As shown, the positioning seat 4 is arc-shaped, one end of the positioning seat 4 is set to be arc-shaped, and the other end of the positioning seat 4 is provided with an arc-shaped flange 30, a cylindrical sleeve is provided on the arc-shaped flange 30, a rounded rectangular shaft hole is provided in the cylindrical sleeve, a stepped rounded rectangular positioning shaft 5 is provided in the rounded rectangular shaft hole, and a shaft hole for accommodating an offset rocker arm 7 is provided on the side of the rectangular positioning shaft 5, and the lower end of the rectangular positioning shaft 5 is provided with an external hexagonal positioning shaft 5 connected thereto and hinged with the internal hexagonal meshing of the end of the main shaft 22 of the connecting mechanism.

[0024] like Fig.10 , Fig.11 As shown, the coupling mechanism is of self-closing type (automatic closing type), including a fixed arm 24, a shell 25, a main shaft 22, a spiral cam 27, a valve body 23, a spring and an end cover 26. The fixed arm 24 is roll-riveted to the upper part of the shell 25, and a mounting screw hole is provided on the fixed arm 24. A bearing support for the main shaft 22 is provided in the shaft hole of the fixed arm 24. A rectangular spline is provided at the upper end of the main shaft 22. A sealing groove is provided in the shaft hole, and a rotating anti-seepage sealing ring is provided in the sealing groove. The end cover 26 is roll-riveted to the lower part of the shell 25, and a sediment self-cleaning device is provided in the end cover 26. annular groove, the lower end of the main shaft 22 is provided with an involute spline meshing and hinged with the internal spline of the spiral cam 27, the main shaft 22 is sleeved with a spring, a roller is provided in the spiral groove of the spiral cam 27, the roller is provided with a support sleeve, a roller, and a spacer sleeve, and the two ends of the roller are supported in the axial hole set in the skirt of the end cover 26, the spiral cam 27 is provided with a built-in valve body 23, the spiral cam 27 is provided with a sealing guide ring, the built-in valve body 23 is provided with an elastic spherical one-way valve 28, the built-in valve body 23 is provided with a conical four-stage speed change valve, and the end cover 26 is provided with a speed regulating wheel on the outside.

[0025] The rotary anti-seepage seal is a rubber ring or a star-shaped sealing ring.

[0026] The rotary anti-seepage seal is a composite flexible seal or a composite mechanical seal, or a series-parallel combination seal.

[0027] like Fig.12 As shown, the spiral cam 27 is provided with an external valve body 23 , the external valve body 23 is provided with a sealing ring, the external valve body 23 is provided with an elastic conical one-way valve 29 , and a temperature-sensitive speed-changing valve is provided in the center hole of the external valve body 23 .

[0028] The temperature-sensitive speed-changing valve is of a composite type, and the base of the temperature-sensitive speed-changing valve is made of a temperature-sensitive material.

[0029] like Fig.13 As shown, the connection mechanism is of a free type, including a fixed support arm 24 and a deep groove bearing 15. A bearing seat is provided on the fixed support arm 24, and a deep groove bearing 15 is provided in the bearing seat.

[0030] The coupling mechanism is of a free type, and an axial hole is provided on the fixed support arm 24, and a self-lubricating bearing or a shaft sleeve is provided in the axial hole.

[0031] The connecting mechanism is of electronically controlled intelligent type, including a fixed arm 24, a main shaft 22, a servo motor, a micro-servo driver, an intelligent controller, a microwave infrared sensor, a humanoid image sensor and a visual anti-pinch sensor. The main shaft 22 is arranged in the shaft hole of the fixed arm 24 and supported by a bearing. The lower end of the main shaft 22 is connected to the servo motor, and the servo motor is controlled by the micro-servo driver. The upper end of the main shaft 22 is provided with a hexagonal groove. The microwave infrared sensor, the humanoid image sensor, the visual anti-pinch sensor and the intelligent controller are wirelessly connected.

[0032] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. For ordinary technicians in this field, without departing from the creative concept of the present invention, several similar deformations, equivalent substitutions, split-and-merge and improvements can be made, all of which should be included in the protection of the present invention.

Claims

1. A finger-pinch prevention door, comprising a door frame (1), a door leaf (2), an anti-pinch strip (3), a positioning seat (4), a positioning shaft (5), an offset rocker arm (7), a door shaft bracket (8), a door shaft (10), a Q-shaped support arm (11) and a connecting mechanism, characterized in that: The door frame (1) is provided with a positioning seat (4) on the upper side, and a cylindrical sleeve connected to the positioning seat (4) is provided on the positioning seat (4), and a positioning shaft (5) is provided in the hole of the cylindrical sleeve, and the positioning shaft (5) drives the offset rocker arm (7) to move axially and be hinged with the connecting mechanism through a positioning screw (6), and a positioning groove (21) is provided at the bottom of the vertical edge of the door frame (1) for embedding a door shaft bracket (8), and an axis hole is provided on the door shaft bracket (8), and a door shaft (10) connected to the door shaft bracket (8) is provided in the axis hole, and the door shaft bracket (8) is fixed to the door frame (1) by screws, and the door leaf (2 ) The end face of one side of the hinged door shaft (10) is set as a plane (12), and an anti-pinch R20-R80mm convex arc (13) is provided at the outer corner, and a positioning hole groove (20) that can accommodate a connecting mechanism is provided at the center of the upper end face of the convex arc (13), and a positioning hole groove (20) that can accommodate a Q-shaped support arm (11) is provided at the center of the lower end face of the convex arc (13). A tapered rolling bearing (14) is provided in the shaft hole of the Q-shaped support arm (11) and is hinged to the door shaft (10), and a sealing anti-pinch strip (3) is provided between the door frame (1) and the door leaf (2).

2. The anti-pinch door according to claim 1, characterized in that: The anti-pinch door is a wooden door, the door frame (1) is set to have three sides, the door frame (1) and the door leaf (2) are spliced ​​by solid wood, the inner angle of the side of the door leaf (2) hinged to the door shaft (10) is set to be an oblique angle (17), the inner angle of the opening side of the door leaf (2) is set to be an oblique angle (17), and the positioning seat (4) is embedded in the prefabricated hole groove (20) from the bottom of the upper door frame (1) and fixed by screws.

3. The anti-pinch door according to claim 1, characterized in that: The anti-pinch door is a steel door, the door frame (1) is set to have four sides, the door frame (1) and the door leaf (2) are formed by die-stamping, bending and welding of steel plates, the bottom edge of the door frame (1) is provided with a raised door stopper, the inner corner of the side of the door leaf (2) hinged to the door shaft (10) is set to be a rounded corner (19), the inner corner of the opening side of the door leaf (2) is set to be a rounded corner (19), and the positioning seat (4) is inserted from the upper side of the upper door frame (1) into the prefabricated hole groove (20) and fixed by welding.

4. The anti-pinch door according to claim 1, characterized in that: The anti-pinch door is an aluminum-wood door, the door frame (1) is configured as a three-sided door, the door frame (1) and the door leaf (2) are formed by aluminum profiles embedded in solid wood boards, the inner angle of the side of the door leaf (2) hinged to the door shaft (10) is configured as an oblique angle (17), the inner angle of the opening side of the door leaf (2) is configured as a right angle (18), and the positioning seat (4) is embedded in a prefabricated hole groove (20) on the upper side of the upper door frame (1) and fixed by riveting.

5. The anti-pinch door according to claim 1, characterized in that: The positioning seat (4) is C-shaped, a cylindrical sleeve is provided on the positioning seat (4), an internal spline is provided in the cylindrical sleeve, the internal spline is slidably engaged with the external spline of the hollow positioning shaft (5), a shaft hole capable of accommodating the offset rocker arm (7) is provided on the side of the hollow positioning shaft (5), an internal spline is provided in the inner hole of the hollow positioning shaft (5), and the internal spline of the hollow positioning shaft (5) is engaged and hinged with the external spline at the end of the main shaft (22) of the connecting mechanism.

6. The anti-pinch door according to claim 1, characterized in that: The positioning seat (4) is Q-shaped, and an outwardly convex arc-shaped flange (30) is provided on the positioning seat (4). A cylindrical shaft sleeve is provided on the outwardly convex arc-shaped flange (30). A smooth shaft hole is provided in the cylindrical shaft sleeve. A solid smooth positioning shaft (5) is provided in the smooth shaft hole. A shaft hole capable of accommodating an offset rocker arm (7) is provided on the side of the solid smooth positioning shaft (5). The smooth positioning shaft (7) is meshed and hinged with the inner hole of a deep groove bearing (15) of the connecting mechanism.

7. The anti-pinch door according to claim 1, characterized in that: The positioning seat (4) is arc-shaped, one end of the positioning seat (4) is arc-shaped, the other end of the positioning seat (4) is provided with an arc-shaped flange (30), a cylindrical sleeve is provided on the arc-shaped flange (30), a rounded rectangular shaft hole is provided in the cylindrical sleeve, a stepped rounded rectangular positioning shaft (5) is provided in the rounded rectangular shaft hole, a shaft hole for accommodating an offset rocker arm (7) is provided on the side of the rectangular positioning shaft (5), and the lower end of the rectangular positioning shaft (5) is provided with an outer hexagonal positioning shaft (5) connected thereto and is engaged with an inner hexagonal hinge at the end of the main shaft (22) of the connecting mechanism.

8. The anti-pinch door according to claim 1, characterized in that: The coupling mechanism is of a self-closing type, comprising a fixed arm (24), a housing (25), a main shaft (22), a spiral cam (27), a valve body (23), a spring and an end cover (26); the fixed arm (24) and the upper part of the housing (25) are roll-riveted together; a mounting screw hole is provided on the fixed arm (24); a bearing support for the main shaft (22) is provided in the hole of the fixed arm shaft (24); a rectangular spline is provided at the upper end of the main shaft (22); a sealing groove is provided in the shaft hole; a rotating anti-seepage seal is provided in the sealing groove; and the end cover (26) is roll-riveted with the lower part of the housing (25); the lower end of the main shaft (22) is provided with an involute spline that meshes and articulates with the internal spline of the spiral cam (27); a spring is sleeved on the main shaft (22); a roller is provided in the spiral groove of the spiral cam (27); a support sleeve, a roller, and a spacer are provided on the roller; both ends of the roller are supported in the shaft holes provided in the skirt of the end cover (26); a valve body (23) is provided on the spiral cam (27); an elastic one-way valve is provided on the valve body (23); and a speed change valve is provided on the valve body (23).

9. The anti-pinch door according to claim 1, characterized in that: The coupling mechanism is of a free type, comprising a fixed support arm (24) and a deep groove bearing (15); a bearing seat is provided on the fixed support arm (24), and a deep groove bearing (15) is provided in the bearing seat.

10. The anti-pinch door according to claim 1, characterized in that: The coupling mechanism is of an electronically controlled intelligent type, comprising a fixed support arm (24), a main shaft (22), a servo motor, a micro-servo driver, an intelligent controller, a microwave infrared sensor, a humanoid image sensor and a visual anti-pinch sensor, wherein the main shaft (22) is arranged in an axial hole of the fixed support arm (24) and supported by a bearing, the lower end of the main shaft (22) is connected to the servo motor, the servo motor is controlled by the micro-servo driver, the upper end of the main shaft (22) is provided with a hexagonal groove, and the microwave infrared sensor, the humanoid image sensor and the visual anti-pinch sensor are wirelessly connected to the intelligent controller.

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