A door fastener

Abstract

The present invention provides a door fixer, which belongs to the field of mechanical manufacturing technology. It includes an outer shell, in which a locking mechanism for fixing the door and a compensation mechanism capable of applying pressure to a foot support in the locking mechanism are arranged, and a release mechanism is also arranged on the outer shell. When the door fixer of the present invention is in use, the outer shell is fixed on the door, and the foot can make the foot support contact with the ground by stepping on the locking mechanism in the outer shell, so that the door can be fixed by using the friction between the foot support and the ground, and the compensation mechanism can apply vertical downward pressure to the foot support after the foot is separated from the locking mechanism in the outer shell, so as to increase the friction resistance between the foot support and the ground, so as to enhance the fixing effect of the door, and the foot can reset the foot support in the locking mechanism and separate it from the ground by stepping on the release mechanism, and after the foot support is separated from the ground, the effect of the compensation mechanism disappears automatically.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical manufacturing and relates to a door fixer. Background Art

[0002] Sometimes, in order to adjust the indoor light intensity or ventilation volume, the door is often not allowed to work in the fully open or fully closed position. However, if there is nothing to support the door, the door will drift with the wind, causing inconvenience to life. In order to fix the door, people have produced various door fixing devices, but it was found during use that none of them achieved the expected purpose. For example, the door suction is the most mature product, but it can only work when the door is fully open and sucked against the wall, and cannot fix the door when the door is opened at any angle. The existing new type of foot-operated latch-type door fixer, although the part of the foot support that contacts the ground after the foot is loosened will generate friction resistance with the ground, so that the door will not be blown away by the wind, but the actual door can still be blown by the wind, because after the weight of the foot is removed, there is no reaction force on the part of the foot support that contacts the ground, that is, the foot support has no vertical downward pressure on the ground, so when the wind is strong, the door can still be blown by the wind.

[0003] For example, a Chinese patent discloses a door opening fixture [application number: 01236386.3], which consists of a left side plate, a right side plate, a pedal rod, a spring and a fixed block. The upper and lower ends of the left side plate and the right side plate are fixed together, and a spring is provided between them; the lower end of the spring is connected to the fixed block; the left side plate and the right side plate are provided with guide rail grooves, and a pedal rod is provided between the guide rail grooves on both sides, and the pedal rod passes through the spring horizontally, and the lower ends of the guide rail grooves of the left and right side plates are provided with stop grooves, but the above-mentioned problems also exist. Summary of the invention

[0004] The purpose of the present invention is to provide a door fastener in view of the above problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A door fixer comprises an outer shell, wherein the outer shell is provided with a locking mechanism for fixing the door and a compensation mechanism capable of applying pressure to a foot support in the locking mechanism, and the outer shell is also provided with a releasing mechanism.

[0007] When the door fixer of the present invention is in use, the outer shell is fixed on the door, and the foot is stepped on the locking mechanism in the outer shell to make the foot support contact with the ground, so that the door can be fixed by utilizing the friction between the foot support and the ground. The compensation mechanism can apply vertical downward pressure to the foot support after the foot is separated from the locking mechanism in the outer shell, so as to increase the friction resistance between the foot support and the ground, thereby enhancing the fixing effect of the door. The foot is stepped on the release mechanism to reset the foot support in the locking mechanism and separate it from the ground. After the foot support is separated from the ground, the effect of the compensation mechanism automatically disappears.

[0008] In the above-mentioned door fixer, the locking mechanism includes a top rod and a support rod, the foot support is fixed at the bottom of the support rod, the top rod is slidably connected to the support rod through a limiting connection structure, and the locking mechanism also includes a top rod fixing structure, and the top rod fixing structure is connected to a release mechanism. Moving the top rod downward can drive the support rod and the foot support connected to the support rod to move downward so that the foot support can contact the ground, thereby fixing the door by using the friction resistance generated by the contact between the foot support and the ground. After the top rod stops moving downward, the top rod fixing structure can fix the top rod. The limiting connection structure can still apply downward pressure to the support rod through the compensation mechanism after the top rod stops moving, thereby increasing the friction resistance between the foot support and the ground.

[0009] In the above-mentioned door fixer, the compensation mechanism includes a compensation spring sleeved on the top rod, a spring seat is fixed on the top rod through a fixing member, and the two ends of the compensation spring are respectively connected to the spring seat and the top of the support rod. When the top rod moves downward, the top rod applies pressure to the compensation spring through the spring seat, and then the reaction force generated by the deformation of the compensation spring drives the support rod and the foot support to move downward. After the foot support contacts the ground, the support rod stops moving downward. Since the top rod is slidably connected to the support rod through a limiting connection structure, continuing to move the top rod downward can apply pressure to the compensation spring to deform the compensation spring. After the top rod stops moving, the top rod is fixed by the top rod fixing structure, so the reaction force generated by the deformation of the compensation spring will be applied to the support rod, thereby increasing the friction resistance between the foot support and the ground.

[0010] The fixing member includes an open retaining spring, but is not limited thereto, and the spring seat is fixed on the ejector rod through the open retaining spring.

[0011] In the above-mentioned door fixer, the limit connection structure includes an upper connection groove arranged at the upper end of the support rod and a lower connection groove arranged at the lower end of the support rod, the upper connection groove and the lower connection groove are separated by a limit plate, the push rod is inserted into the upper connection groove and fixed by connecting screws and the limit plate, the nut end of the connecting screw is located in the lower connection groove, and a compensation gap is provided between the bottom end of the push rod and the limit plate. The limit plate and the push rod can be fixed by the connecting screw to prevent the push rod from being separated from the support rod, and the compensation gap can enable the push rod to still move downward after the foot support contacts the ground, so that the compensation spring can be squeezed and stored and generate a reaction force acting on the foot support.

[0012] In the above-mentioned door fixer, the push rod fixing structure includes a lock plate, a connecting hole is provided on the lock plate, the center line of the connecting hole coincides with the center line of the push rod and the hole diameter of the connecting hole is larger than the outer diameter of the push rod, and also includes a lock plate lifting assembly. The push rod passes through the connecting hole in the lock plate, and when the center line of the connecting hole and the center line of the push rod are in axial balance, the push rod can slide up and down along the connecting hole, and the lock plate lifting assembly can apply an upward force to one end of the lock plate so as to lift up one end of the lock plate, so that the inner wall of the connecting hole and the side wall of the push rod abut against each other and the push rod is clamped, and the loosening structure can offset the force applied to the lock plate by the lock plate lifting assembly and drive the push rod to rise, so that the foot support is separated from the ground and the door is unlocked.

[0013] Since the locking plate lifting assembly fixes the push rod by applying an upward force to one end of the locking plate, part of the force generated by the locking plate lifting assembly can be offset when the push rod is moved downward. Therefore, when the push rod is in a state of being fixed by the locking plate, the push rod can still move downward and drive the support rod to move downward.

[0014] In the above-mentioned door fastener, the lock plate lifting assembly includes: a slot, which is arranged on the side of the outer shell away from the release mechanism, and the lock tongue of the lock plate is inserted into the slot; a lifting member, which is arranged opposite to the slot and connected to the lock plate through the release mechanism, and can lift the lock plate away from the slot to the inner wall of the connecting hole and the push rod; the upper side of the slot is provided with a rotation gap. The lifting member can drive the lock plate away from the slot to lift up to the inner wall of the connecting hole and the push rod. The lifting member includes a lifting spring.

[0015] In the above-mentioned door fastener, the release mechanism includes a release button slidably connected to the outer shell, and two horizontally arranged screws are fixed to the release button. The two horizontally arranged screws are respectively located on the upper and lower sides of the lock plate, and the screws and the lock plate are in contact. The lifting spring can drive the release button to move upward, and the upward movement of the release button can apply an upward force to the end of the lock plate away from the slot through the screw located on the lower side of the lock plate. When the release button moves downward, the screw located on the upper side of the lock plate can apply a downward force to the lock plate to offset the upward force applied to the lock plate by the lift spring.

[0016] In the above-mentioned door fastener, the release mechanism further includes a reset structure arranged in the outer shell.

[0017] In the above-mentioned door fastener, the reset structure includes a reset spring sleeved on the support rod, the top end of the reset spring is connected to the spring seat and the bottom end is connected to the outer shell. When the release button moves downward and offsets the force applied by the lifting spring to the lock plate, the reset spring can drive the top rod to move upward and reset, so that the foot support can be separated from the ground.

[0018] In the above-mentioned door fixer, two mounting plates are symmetrically arranged on the upper and lower sides of the mounting end of the outer shell, and at least two screw holes are arranged on the mounting plate;

[0019] The top of the push rod passes through the outer shell and is screwed with a locking button, and the foot support is screwed with the support rod.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. When the door fixer is in use, the outer shell is fixed on the door, and the foot is stepped on the locking mechanism in the outer shell to make the foot support contact with the ground, so that the door can be fixed by utilizing the friction between the foot support and the ground. The compensation mechanism can apply vertical downward pressure to the foot support after the foot is separated from the locking mechanism in the outer shell, so as to increase the friction resistance between the foot support and the ground, thereby enhancing the fixing effect of the door. The foot is stepped on the release mechanism to reset the foot support in the locking mechanism and separate it from the ground. After the foot support is separated from the ground, the effect of the compensation mechanism disappears automatically.

[0022] 2. Moving the top rod downward can drive the support rod and the foot support connected to the support rod to move downward so that the foot support can contact the ground, thereby using the friction resistance generated by the contact between the foot support and the ground to fix the door. After the top rod stops moving downward, the top rod fixing structure can fix the top rod. The limiting connection structure can still apply downward pressure to the support rod through the compensation mechanism after the top rod stops moving, thereby increasing the friction resistance between the foot support and the ground.

[0023] 3. When the push rod moves downward, the push rod applies pressure to the compensation spring through the spring seat, and then the reaction force generated by the deformation of the compensation spring drives the support rod and the foot support to move downward. After the foot support contacts the ground, the support rod stops moving downward. Since the push rod is slidingly connected to the support rod through a limiting connection structure, continuing to move the push rod downward can apply pressure to the compensation spring to deform the compensation spring. After the push rod stops moving, the push rod is fixed by the push rod fixing structure. Therefore, the reaction force generated by the deformation of the compensation spring will be applied to the support rod, thereby increasing the friction resistance between the foot support and the ground.

[0024] 4. The limit plate and the push rod can be fixed by connecting screws to prevent the push rod and the support rod from detaching. The compensation gap can enable the push rod to move downward after the foot support contacts the ground, so that the compensation spring can be squeezed and stored to generate a reaction force acting on the foot support.

[0025] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure provided by the present invention;

[0027] Figure 2 is a cross-sectional view provided by the present invention;

[0028] Figure 3 It is a top view provided by the present invention.

[0029] In the figure, the outer shell 1, the locking mechanism 2, the foot support 3, the compensation mechanism 4, the loosening mechanism 5, the top rod 6, the support rod 7, the limiting connection structure 8, the top rod fixing structure 9, the compensation spring 10, the fixing part 11, the spring seat 12, the upper connecting groove 13, the lower connecting groove 14, the limiting plate 15, the connecting screw 16, the compensation gap 17, the locking plate 18, the connecting hole 19, the locking plate lifting assembly 20, the card slot 21, the lifting part 22, the rotation gap 23, the loosening button 24, the buckle screw 25, the reset structure 26, the reset spring 27, the mounting plate 28, the screw hole 29, and the locking button 30. DETAILED DESCRIPTION

[0030] like Figure 1-Figure 3 As shown, a door fixer comprises an outer shell 1, in which a locking mechanism 2 for fixing the door and a compensation mechanism 4 capable of applying pressure to a foot support 3 in the locking mechanism 2 are arranged, and a release mechanism 5 is also arranged on the outer shell 1.

[0031] When the door fixer of the present invention is in use, the outer shell is fixed on the door, and the foot is stepped on the locking mechanism in the outer shell to make the foot support contact with the ground, so that the door can be fixed by utilizing the friction between the foot support and the ground. The compensation mechanism can apply vertical downward pressure to the foot support after the foot is separated from the locking mechanism in the outer shell, so as to increase the friction resistance between the foot support and the ground, thereby enhancing the fixing effect of the door. The foot is stepped on the release mechanism to reset the foot support in the locking mechanism and separate it from the ground. After the foot support is separated from the ground, the effect of the compensation mechanism 4 automatically disappears.

[0032] Specifically, combined with Figure 1-Figure 3As shown, the locking mechanism 2 includes a top rod 6 and a support rod 7, the foot support 3 is fixed at the bottom of the support rod 7, the top rod 6 is slidably connected to the support rod 7 through a limiting connection structure 8, and the locking mechanism 2 also includes a top rod fixing structure 9, and the top rod fixing structure 9 is connected to the release mechanism 5. Moving the top rod downward can drive the support rod and the foot support connected to the support rod to move downward so that the foot support can contact the ground, so that the door can be fixed by using the friction resistance generated by the contact between the foot support and the ground. After the top rod stops moving downward, the top rod fixing structure can fix the top rod, and the limiting connection structure 8 can still apply downward pressure to the support rod through the compensation mechanism after the top rod stops moving, thereby increasing the friction resistance between the foot support and the ground.

[0033] Specifically, combined with Figure 1-Figure 3 As shown, the compensation mechanism 4 includes a compensation spring 10 sleeved on the push rod 6, and a spring seat 12 is fixed on the push rod 6 through a fixing member 11, and the two ends of the compensation spring 10 are respectively connected to the spring seat 12 and the top of the support rod 7. When the push rod moves downward, the push rod applies pressure to the compensation spring through the spring seat, and then the reaction force generated by the deformation of the compensation spring drives the support rod and the foot support to move downward. After the foot support contacts the ground, the support rod stops moving downward. Since the push rod 6 is slidably connected to the support rod 7 through the limit connection structure 8, continuing to move the push rod downward can apply pressure to the compensation spring to deform the compensation spring. After the push rod stops moving, the push rod is fixed by the push rod fixing structure 9, so the reaction force generated by the deformation of the compensation spring will be applied to the support rod, thereby increasing the friction resistance between the foot support and the ground.

[0034] The fixing member 11 includes an open retaining spring, but is not limited thereto. The spring seat 12 is fixed to the ejector rod 6 via the open retaining spring.

[0035] Specifically, combined with Figure 1-Figure 3 As shown, the limiting connection structure 8 includes an upper connection groove 13 provided at the upper end of the support rod 7 and a lower connection groove 14 provided at the lower end of the support rod 7, the upper connection groove 13 and the lower connection groove 14 are separated by a limiting plate 15, the push rod 6 is inserted into the upper connection groove 13 and fixed by connecting screws 16 and the limiting plate 15, the nut end of the connecting screw 16 is located in the lower connection groove 14, and a compensation gap 17 is provided between the bottom end of the push rod 6 and the limiting plate 15. The limiting plate and the push rod can be fixed by connecting screws to prevent the push rod from being separated from the support rod, and the compensation gap 17 can enable the push rod to still move downward after the foot support contacts the ground, so that the compensation spring can be squeezed and stored and generate a reaction force acting on the foot support.

[0036] Specifically, combined with Figure 1-Figure 3As shown, the top rod fixing structure 9 includes a lock plate 18, and the lock plate 18 is provided with a connecting hole 19, the center line of the connecting hole 19 coincides with the center line of the top rod 6, and the hole diameter of the connecting hole 19 is larger than the outer diameter of the top rod 6, and also includes a lock plate lifting assembly 20. The top rod passes through the connecting hole in the lock plate, and when the center line of the connecting hole and the center line of the top rod are in axial balance, the top rod can slide up and down along the connecting hole, and the lock plate lifting assembly can apply an upward force to one end of the lock plate so as to lift up one end of the lock plate, so that the inner wall of the connecting hole and the side wall of the top rod abut against each other and the top rod is stuck, and the loosening structure can offset the force applied to the lock plate by the lock plate lifting assembly and drive the top rod to rise, so that the foot support is separated from the ground and the door is unlocked.

[0037] Since the locking plate lifting assembly fixes the push rod by applying an upward force to one end of the locking plate, part of the force generated by the locking plate lifting assembly can be offset when the push rod is moved downward. Therefore, when the push rod is in a state of being fixed by the locking plate, the push rod can still move downward and drive the support rod to move downward.

[0038] Specifically, combined with Figure 1-Figure 3 As shown, the locking plate lifting assembly 20 includes: a card slot 21, which is arranged on the side of the outer shell 1 away from the release mechanism 5, and the locking tongue of the locking plate 18 is inserted into the card slot 21;

[0039] The lifting member 22 is arranged opposite to the card slot 21 and connected to the lock plate 18 through the release mechanism 5, and can lift the end of the lock plate 18 away from the card slot 21 to the inner wall of the connecting hole 19 and the push rod 6; the upper side of the card slot 21 is provided with a rotation gap 23. The lifting member can drive the end of the lock plate 18 away from the card slot 21 to lift to the inner wall of the connecting hole 19 and the push rod 6. The lifting member 22 includes a lifting spring.

[0040] Specifically, combined with Figure 1-Figure 3 As shown, the release mechanism 5 includes a release button 24 slidably connected to the outer shell 1, and two horizontally arranged push screws 25 are fixed on the release button 24. The two horizontally arranged push screws 25 are respectively located on the upper and lower sides of the locking plate 18 and the push screws 25 and the locking plate 18 are abutted. The release mechanism 5 also includes a reset structure 26 arranged in the outer shell 1, and the reset structure 26 includes a reset spring 27 sleeved on the support rod 7, and the top end of the reset spring 27 is connected to the spring seat 12 and the bottom end is connected to the outer shell 1.

[0041] The lifting spring can drive the release button to move upward, and the upward movement of the release button can apply an upward force to the end of the lock plate away from the card slot through the push screw 25 located at the lower side of the lock plate 18. When the release button 24 moves downward, the push screw 25 located at the upper side of the lock plate can apply a downward force to the lock plate to offset the upward force applied to the lock plate by the lifting spring;

[0042] When the release button 24 moves downward and offsets the force exerted by the lifting spring on the locking plate, the return spring 27 can drive the push rod to move upward and return to its original position, thereby making the foot support break away from the ground.

[0043] Preferably, combined Figure 1-Figure 3 As shown, two mounting plates 28 are symmetrically arranged on the upper and lower sides of the mounting end of the outer shell 1, and at least two screw holes 29 are arranged on the mounting plate 28;

[0044] The top of the push rod 6 passes through the outer shell 1 and is screwed with a locking button 30 , and the foot support 3 and the support rod 7 are screwed.

[0045] The working principle of the present invention is as follows: when the door fixer of the present invention is used, the outer shell is fixed on the door, and the foot is stepped on the locking mechanism in the outer shell to make the foot support contact with the ground, so that the door can be fixed by the friction between the foot support and the ground, and the compensation mechanism can apply vertical downward pressure to the foot support after the foot is separated from the locking mechanism in the outer shell, so as to increase the friction resistance between the foot support and the ground, so as to enhance the fixing effect of the door, and the foot is stepped on the release mechanism to reset the foot support in the locking mechanism and separate it from the ground, and after the foot support is separated from the ground, the function of the compensation mechanism 4 automatically disappears;

[0046] Moving the top rod downward can drive the support rod and the foot support connected to the support rod to move downward so that the foot support can contact the ground, thereby fixing the door by using the friction resistance generated by the contact between the foot support and the ground. After the top rod stops moving downward, the top rod fixing structure can fix the top rod. The limiting connection structure 8 can still apply downward pressure to the support rod through the compensation mechanism after the top rod stops moving, thereby increasing the friction resistance between the foot support and the ground.

[0047] When the push rod moves downward, the push rod applies pressure to the compensation spring through the spring seat, and then the reaction force generated by the deformation of the compensation spring drives the support rod and the foot support to move downward. After the foot support contacts the ground, the support rod stops moving downward. Since the push rod 6 is slidably connected to the support rod 7 through the limit connection structure 8, continuing to move the push rod downward can apply pressure to the compensation spring to deform the compensation spring. After the push rod stops moving, the push rod is fixed by the push rod fixing structure 9. Therefore, the reaction force generated by the deformation of the compensation spring will be applied to the support rod, thereby increasing the friction resistance between the foot support and the ground.

[0048] The limit plate and the push rod can be fixed by connecting screws to prevent the push rod and the support rod from being separated. The compensation gap 17 can enable the push rod to move downward after the foot support contacts the ground, so that the compensation spring can be squeezed and stored to generate a reaction force acting on the foot support.

[0049] The push rod passes through the connection hole in the lock plate. When the center line of the connection hole and the center line of the push rod are in axial balance, the push rod can slide up and down along the connection hole. The lock plate lifting assembly can apply an upward force to one end of the lock plate, thereby lifting one end of the lock plate, so that the inner wall of the connection hole and the side wall of the push rod abut against each other and the push rod is clamped. The loosening structure can offset the force applied to the lock plate by the lock plate lifting assembly and drive the push rod to rise, so that the foot support is separated from the ground and the door is unlocked;

[0050] Since the locking plate lifting assembly fixes the push rod by applying an upward force to one end of the locking plate, a part of the force generated by the locking plate lifting assembly can be offset when the push rod is moved downward. Therefore, when the push rod is in a state of being fixed by the locking plate, the push rod can still move downward and drive the support rod to move downward.

[0051] The lifting member can drive the locking plate 18 to lift up one end away from the card slot 21 until the inner wall of the connecting hole 19 and the push rod 6 abut against each other;

[0052] The lifting spring can drive the release button to move upward, and the upward movement of the release button can apply an upward force to the end of the lock plate away from the card slot through the push screw 25 located at the lower side of the lock plate 18. When the release button 24 moves downward, the push screw 25 located at the upper side of the lock plate can apply a downward force to the lock plate to offset the upward force applied to the lock plate by the lifting spring;

[0053] When the release button 24 moves downward and offsets the force exerted by the lifting spring on the locking plate, the return spring 27 can drive the push rod to move upward and return to its original position, thereby making the foot support break away from the ground.

[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0055] Although this article uses the outer shell 1, locking mechanism 2, foot support 3, compensation mechanism 4, release mechanism 5, push rod 6, support rod 7, limit connection structure 8, push rod fixing structure 9, compensation spring 10, fixing part 11, spring seat 12, upper connecting groove 13, lower connecting groove 14, limit plate 15, connecting screw 16, compensation gap 17, lock plate 18, connecting hole 19, lock plate lifting assembly 20, slot 21, lifting part 22, rotation gap 23, release button 24, push screw 25, reset structure 26, reset spring 27, mounting plate 28, screw hole 29, lock button 30 and the like more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A door fastener, comprising an outer shell (1), characterized in that: The outer shell (1) is provided with a lock mechanism (2) for fixing the door and a compensation mechanism (4) capable of applying pressure to a foot support (3) in the lock mechanism (2); the outer shell (1) is also provided with a release mechanism (5); the lock mechanism (2) comprises a top rod (6) and a support rod (7); the foot support (3) is fixed to the bottom of the support rod (7); the top rod (6) is slidably connected to the support rod (7) via a limiting connection structure (8); the lock mechanism (2) further comprises a top rod fixing structure (9); the top rod fixing structure (9) is connected to the release mechanism (5); the compensation mechanism (4) comprises a compensation spring (10) sleeved on the top rod (6); the top rod (6) is provided with a compensation spring (10) A spring seat (12) is fixed by a fixing member (11), and two ends of the compensation spring (10) are respectively connected to the spring seat (12) and the top end of the support rod (7); the limiting connection structure (8) comprises an upper connection groove (13) arranged at the upper end of the support rod (7) and a lower connection groove (14) arranged at the lower end of the support rod (7); the upper connection groove (13) and the lower connection groove (14) are separated by a limiting plate (15); the push rod (6) is inserted into the upper connection groove (13) and fixed by a connecting screw (16) and the limiting plate (15); the nut end of the connecting screw (16) is located in the lower connection groove (14); and a compensation gap (17) is provided between the bottom end of the push rod (6) and the limiting plate (15).

2. A door fastener according to claim 1, characterized in that: The push rod fixing structure (9) comprises a locking plate (18), the locking plate (18) is provided with a connecting hole (19), the center line of the connecting hole (19) coincides with the center line of the push rod (6), and the hole diameter of the connecting hole (19) is larger than the outer diameter of the push rod (6), and also comprises a locking plate lifting assembly (20).

3. A door fastener according to claim 2, characterized in that: The locking plate lifting assembly (20) comprises: A card slot (21), the card slot (21) being arranged on a side of the outer shell (1) away from the release mechanism (5), and a locking tongue of the locking plate (18) being inserted into the card slot (21); A lifting member (22), the lifting member (22) being arranged opposite to the card slot (21) and connected to the locking plate (18) via a loosening mechanism (5), and being capable of lifting the end of the locking plate (18) away from the card slot (21) until it abuts against the inner wall of the connecting hole (19) and the push rod (6); A rotation gap (23) is provided on the upper side of the clamping slot (21).

4. A door fastener according to claim 2, characterized in that: The release mechanism (5) comprises a release button (24) slidably connected to the outer shell (1), and two horizontally arranged push screws (25) are fixed to the release button (24). The two horizontally arranged push screws (25) are respectively located on the upper and lower sides of the locking plate (18), and the push screws (25) and the locking plate (18) are in abutment with each other.

5. A door fastener according to claim 2, characterized in that: The release mechanism (5) further comprises a reset structure (26) arranged in the outer shell (1).

6. A door fastener according to claim 5, characterized in that: The reset structure (26) comprises a reset spring (27) sleeved on the support rod (7); the top end of the reset spring (27) is connected to the spring seat (12) and the bottom end is connected to the outer shell (1).

7. A door fastener according to claim 1, characterized in that: Two mounting plates (28) are symmetrically arranged on the upper and lower sides of the mounting end of the outer shell (1), and at least two screw holes (29) are arranged on the mounting plates (28); The top of the push rod (6) passes through the outer shell (1) and is screwed with a locking button (30), and the foot support (3) and the support rod (7) are screwed.

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