A hidden anti-pinch door lock

Abstract

The application relates to a hidden anti-pinch hand door lock, belonging to the technical field of door locks, which comprises two door handles, a first mounting shell and two second mounting shells, the door handle, the first mounting shell and the second mounting shell are all mounted on a door frame, a transmission assembly is arranged in the first mounting shell, the transmission assembly is connected with a lock tongue, the transmission assembly can drive the lock tongue to extend out of the first mounting shell, a rotating assembly is arranged in the second mounting shell, the rotating assembly controls the operation of the transmission assembly, the rotating assembly is connected with a pushing block, a first guide inclined surface is arranged on the top of the pushing block, the two second mounting shells are respectively located on the sides of the first mounting shell, the door handle covers the pushing block and the second mounting shell on the same side, the door handle, the door frame and a door plate enclose a vertical through space, and the door plate is located between the two second mounting shells. The application has the effect of prolonging the service life of the door handle.

Description

Technical Field

[0001] This application relates to the field of door lock technology, and in particular to a concealed anti-pinch door lock. Background Technology

[0002] In common door handle structures, an L-shaped or ball-shaped handle is usually connected to the lock cylinder. To open the door, you turn the handle and then pull it to open the door. However, with this type of door handle structure, the lock cylinder is constantly being pulled during long-term use. Over time, the door handle may become loose or the handle may separate from the lock cylinder shaft. Furthermore, when the door is a glass door, the weight of the glass door requires more force to pull the door handle, which can easily lead to damage to the door handle. Summary of the Invention

[0003] In order to improve the service life of door handles, this application provides a concealed anti-pinch door lock.

[0004] The concealed anti-pinch door lock provided in this application adopts the following technical solution: A concealed anti-pinch door lock includes two door handles, a first mounting shell, and two second mounting shells. The door handles, the first mounting shell, and the second mounting shells are all mounted on a door frame. A transmission assembly is disposed within the first mounting shell, and the transmission assembly is connected to a latch. The transmission assembly can drive the latch to extend out of the first mounting shell. A rotating assembly is disposed within the second mounting shell, and the rotating assembly controls the operation of the transmission assembly. The rotating assembly is connected to a lever, and the top of the lever has a first guide slope. The two second mounting shells are respectively located on one side of the first mounting shell. The door handles cover the lever and the second mounting shell on the same side as the door handle. The door handles, the door frame, and the door panel form a vertically continuous space, with the door panel located between the two second mounting shells.

[0005] By adopting the above technical solution, when opening the door, the hand is extended vertically into the vertically penetrating space, and the hand abuts against the first guide slope. As the hand moves vertically, the lever rotates, driving the rotating component to control the movement of the transmission component. The transmission component controls the separation of the lock tongue from the lock hole. Then, while the hand is still abutting against the lever, the door handle is held, and the door can be opened by pulling the door handle. This avoids pulling the parts connected to the core column when opening the door, reduces the possibility of the parts connected to the core column becoming detached or loose, and improves the service life of the door handle.

[0006] Optionally, the transmission assembly includes a movable plate slidably disposed within the first mounting housing. The movable plate is connected to the locking tongue. Two guide blocks are provided on the movable plate, and a rotating plate is disposed between the two guide blocks. A second guide slope is provided on the side of each guide block facing the rotating plate. Both ends of the rotating plate abut against the two second guide slopes respectively. A fixed post is provided within the first mounting housing, and a torsion spring is sleeved on the fixed post. Both ends of the torsion spring are connected to the movable plate. The rotating assembly controls the rotation of the rotating plate.

[0007] By adopting the above technical solution, the paddle block drives the rotating assembly to control the rotation of the rotating plate. One end of the rotating plate abuts against the second guide slope of a guide block, causing the moving plate to move. The moving plate drives the lock tongue to move in the direction of extending into the first mounting shell. The other guide block separates from the rotating plate, realizing the separation of the lock tongue from the lock hole. At this time, the two ends of the torsion spring are squeezed. When the lever is released, the torsion spring returns to its natural state, and the torsion spring drives the moving plate to move. A guide block pushes the rotating plate to rotate. When both guide blocks are in contact with the rotating plate, the lock tongue is in the reset state.

[0008] Optionally, an arc-shaped groove is provided inside the first mounting housing, the arc-shaped groove is coaxially arranged with the rotating plate, and a guide post is provided on the rotating plate, the guide post being inserted into the arc-shaped groove.

[0009] By adopting the above technical solution, the guide column moves along the arc groove, which guides the rotating plate and reduces the possibility of the rotating plate being misaligned.

[0010] Optionally, the rotating assembly includes two rotating columns, each connected to the lever on the same side, and the rotating column is connected to the end of the lever away from its first guide slope. The rotating column extends out of the second mounting shell and into the first mounting shell. The rotating column has a first slot. Both sides of the rotating plate are provided with first insert plates. The first insert plates are inserted into the first slots on the same side and are adapted to each other. The rotating column and the rotating plate are coaxial.

[0011] By adopting the above technical solution, the pusher block drives the rotating column to rotate, the rotating column drives the first insert plate to rotate, thus realizing the rotating column drives the rotating plate to rotate. Furthermore, by utilizing the cooperation between the guide column and the arc groove, and the cooperation between the first insert plate and the first insertion groove, the end face of the rotating plate abuts against the second guide inclined surface, which facilitates assembly and installation.

[0012] Optionally, the second mounting housing has a recess, and the side of the first mounting housing is located in the recess on the same side.

[0013] By adopting the above technical solution, the overall size of the door lock can be appropriately reduced, making it easier to install on door frames of different widths.

[0014] Optionally, a fixed plate is connected to the rotating column, and a snap-fit ​​block is connected to the fixed plate. A lifting plate is slidably disposed inside each of the two second mounting shells. The lifting plate is located below the fixed plate. Each of the two lifting plates has a first snap-fit ​​groove and a second snap-fit ​​groove. The two second snap-fit ​​grooves are connected to a connecting column. The connecting column is interference-fitted with the second snap-fit ​​groove. When each end of the rotating plate contacts and abuts against the two second guide inclined surfaces, the snap-fit ​​block is directly opposite the first snap-fit ​​groove. The snap-fit ​​block can be inserted into the first snap-fit ​​groove and interference-fitted. An adjusting component for controlling the lifting of the lifting plate is provided inside the second mounting shell.

[0015] By adopting the above technical solution, when the door needs to be locked, the adjusting component is adjusted to raise the lifting plate. One lifting plate drives the linkage column to rise, causing the other lifting plate to rise synchronously. The first locking groove of the two lifting plates is respectively interference-fitted with the corresponding locking block, thereby restricting the rotation of the fixed plate. The limiting block drives the rotating column to rotate, thus achieving the locking effect.

[0016] Optionally, the adjusting component includes a first adjusting block and a second adjusting block, each of which is located within a second mounting shell. The second mounting shell has a strip-shaped hole, the first adjusting block extends out of the strip-shaped hole, and the second adjusting block is located within the strip-shaped hole. The first adjusting block and the second adjusting block are each fixed to a lifting plate, and the second adjusting block has a locking hole.

[0017] By adopting the above technical solution, when installing the door lock, the first adjustment block is located on one side inside the room, and the door can be locked by manually moving the first adjustment block from inside the room. The second adjustment block is located on the outside side of the room, and the door can be locked by inserting the corresponding key into the keyhole.

[0018] Optionally, a first limiting plate is provided inside the second mounting shell, a second limiting plate is provided on the rotating column, an abutment plate is connected to the fixing plate, the abutment plate abuts against the second limiting plate, the first limiting plate abuts against the snap-fit ​​block, and the fixing plate is located between the first limiting plate and the second limiting plate.

[0019] By adopting the above technical solution, the cooperation of the first limiting plate and the second limiting plate can quickly position the fixing plate, which facilitates the rapid assembly of the door lock.

[0020] Optionally, a second slot is provided on the rotating column, the first slot is provided on the end face of the rotating column, the second slot is provided on the side of the rotating column, and a second insert plate is provided on the fixing plate, the second insert plate is inserted into the second slot and adapted to it.

[0021] By adopting the above technical solution, when installing the door lock, the second insert plate is inserted into the second slot, and then the fixing plate is pushed to abut against the second limiting plate. Then, the first limiting plate is installed in the second mounting shell so that the first limiting plate abuts against the snap-fit ​​block. When installing the rotating plate, the first insert plate is inserted into the first slot, and then the two ends of the rotating plate are respectively attached to the two second guide slopes, thereby realizing the rapid positioning of the rotating plate. Finally, the first mounting shell and the second mounting shell are covered, and the installation of the door lock can be completed quickly.

[0022] Optionally, the two second mounting shells are bolted together to a first connecting plate, the first mounting shell passes through the first connecting plate, a second connecting plate is provided at the end of the first mounting shell near the latch, the second connecting plate is bolted to the first connecting plate, and a dustproof gasket is provided in the space between the latch and the first connecting plate.

[0023] By adopting the above technical solution, the cooperation between the first connecting plate and the second mounting shell, and the cooperation between the second connecting plate and the first connecting plate, can securely fix the second mounting shell and the first mounting shell to the door frame. The dustproof gasket can play a role in waterproofing and dustproofing, reducing the possibility of corrosion and damage to the parts inside the first mounting shell.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. When opening the door, extend your hand vertically into the vertically penetrating space. Your hand contacts the first guide slope. As your hand moves vertically, the lever rotates, driving the rotating component to control the movement of the transmission component. The transmission component controls the separation of the bolt from the lock hole. Then, while keeping your hand in contact with the lever, hold the door handle and pull the door handle to open the door. This avoids pulling the parts connected to the core column when opening the door, reducing the possibility of the parts connected to the core column becoming detached or loose, and improving the service life of the door handle. 2. When installing the door lock, insert the second insert plate into the second slot, then push the fixing plate to abut against the second limiting plate. Then install the first limiting plate inside the second mounting shell, so that the first limiting plate abuts against the snap-fit ​​block. When installing the rotating plate, insert the first insert plate into the first slot, then align the two end faces of the rotating plate with the two second guide slopes respectively, thereby achieving quick positioning of the rotating plate. Finally, cover the first mounting shell and the second mounting shell to quickly complete the installation of the door lock. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the structure of the first connecting plate and the second connecting plate used in the embodiments of this application.

[0027] Figure 3This is a schematic diagram illustrating the structure of the transmission assembly in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram illustrating the structure of the arc-shaped groove in an embodiment of this application.

[0029] Figure 5 This is a schematic diagram illustrating the structure of the rotating assembly in an embodiment of this application.

[0030] Figure 6 This is a schematic diagram illustrating the structure of the adjusting component in an embodiment of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. First mounting shell; 11. Second connecting plate; 12. Dustproof gasket; 13. Arc groove; 2. Second mounting shell; 21. Embedded groove; 22. Strip hole; 3. Door handle; 4. Transmission assembly; 41. Moving plate; 42. Lock tongue; 43. Guide block; 431. Second guide slope; 44. Rotating plate; 45. Cylindrical shaft; 46. First insert plate; 47. Fixed post; 48. Torsion spring; 410. Guide post; 5. First connecting plate; 6. Rotating assembly 61. Rotating column; 611. First slot; 612. Second slot; 62. Fixing plate; 63. Second insert plate; 64. Second limiting plate; 65. Abutment plate; 66. Snap-fit ​​block; 67. First limiting plate; 671. Slide groove; 68. Lifting plate; 681. First snap-fit ​​groove; 682. Second snap-fit ​​groove; 69. Linking column; 7. Adjusting component; 71. First adjusting block; 72. Second adjusting block; 721. Locking hole; 8. Toggle block; 81. First guide slope. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0033] This application discloses a concealed anti-pinch door lock.

[0034] like Figure 1 , Figure 2 and Figure 3The concealed anti-pinch door lock includes a first mounting shell 1, two second mounting shells 2, and two door handles 3. A transmission assembly 4 is installed inside the first mounting shell 1. The transmission assembly 4 includes a moving plate 41, which is V-shaped. A locking tongue 42 is bolted to the moving plate 41 and extends out of the first mounting shell 1. Two guide blocks 43 are provided at the end of the moving plate 41 away from the locking tongue 42. The opposing surfaces of the two guide blocks 43 are configured as a second guide ramp 431. A rotatable connection is provided inside the first mounting shell 1. A rotating plate 44 is an arc-shaped plate. Its two end faces abut against the second guide slope 431. A cylindrical shaft 45 is installed on the inner wall of the rotating plate 44, extending from both sides of the first mounting shell 1. First insert plates 46 are provided on both end faces of the cylindrical shaft 45. A fixing post 47 is fixed inside the first mounting shell 1, and a torsion spring 48 is sleeved on the fixing post 47. Both ends of the torsion spring 48 are fixed to the moving plate 41, and both ends of the torsion spring 48 are inclined towards the locking tongue 42. A second connecting plate 11 is connected to one end of the first mounting shell 1 near the locking tongue 42. A dustproof gasket 12 is provided in the space between the second connecting plate 11 and the locking tongue 42, and the dustproof gasket 12 engages with the inner wall of the second mounting shell 2. like Figure 3 and Figure 4 An arc-shaped groove 13 is provided on the inner side wall of the first mounting shell 1. A guide post 410 is connected to the rotating plate 44. The arc-shaped groove 13 is coaxial with the cylindrical shaft 45, and the guide post 410 is inserted into the arc-shaped groove 13.

[0035] like Figure 2 Both second mounting shells 2 are provided with grooves 21. Both second mounting shells 2 are embedded in one side of the first mounting shell 1 through the grooves 21. The second connecting plate 11 is bolted to the first connecting plate 5. The first connecting plate 5 is bolted to the two second mounting shells 2. The first connecting plate 5 and the two second mounting shells 2 abut against the door frame. like Figure 3 and Figure 5 The second mounting shell 2 is provided with a rotating assembly 6, which includes a rotating column 61. One end of the rotating column 61 extends out of the groove 21, and the other end extends out from the side of the second mounting shell 2 away from the first mounting shell 1. A first slot 611 is provided at the end of the rotating column 61 that extends out of the groove 21. The first slot 611 is a straight groove that passes through the circumference of the rotating column 61. A first insert plate 46 is inserted into the first slot 611 on the same side and is adapted to it. A second slot 612 is provided along the circumference of the rotating column 61. The second slot 612 passes through the end face of the end of the rotating column 61 that extends out of the groove 21. A fixed plate 62 is fitted onto the rotating column 61. The fixed plate 62 is annular. A second insert plate 63 is connected to the inner wall of the fixed plate 62. The second insert plate 63 is inserted into the second slot 612. A second limiting plate 64 is fixed on the rotating column 61. An abutment plate 65 is connected to the side of the fixed plate 62 away from the cylindrical shaft 45. The abutment plate 65 abuts against the second limiting plate 64. A snap-fit ​​block 66 is connected to the circumferential surface of the fixed plate 62. A first limiting plate 67 is installed inside the second mounting shell 2. The first limiting plate 67 abuts against the snap-fit ​​block 66. The two second mounting shells 2 pass through their respective slots 21 and enter the linkage column 69 together. The linkage column 69 passes through the first limiting plate 67. A sliding groove 671 is provided on the first limiting plate 67 for the linkage column 69 to move up and down. A lifting plate 68 is slidably disposed within the second mounting housing 2. The lifting plate 68 has a first locking groove 681 and a second locking groove 682. The linkage column 69 is interference-fitted with the second locking groove 682 on the same side. When the locking tongue 42 is fully extended from the first mounting housing 1, the locking block 66 is located above and directly opposite the first locking groove 681. The two second mounting housings 2 are provided with adjusting members 7 for controlling the two lifting plates 68 to rise simultaneously so that the locking block 66 is interference-fitted with the first locking groove 681.

[0036] like Figure 5 and Figure 6 The adjusting component 7 includes a first adjusting block 71 and a second adjusting block 72. The first adjusting block 71 and the second adjusting block 72 are each located in a second mounting shell 2. The second mounting shell 2 has a strip hole 22 on the side opposite to the locking tongue 42. The first adjusting block 71 extends out of the strip hole 22, and the second adjusting block 72 is located in the strip hole 22. The first adjusting block 71 and the second adjusting block 72 are each fixed to a lifting plate 68. The second adjusting block 72 has a locking hole 721.

[0037] like Figure 1 and Figure 2 Two rotating columns 61 are connected to a lever 8 at opposite ends. The bottom of the rotating column 61 is connected to the lever 8. The top of the lever 8 is provided with a first guide slope 81. The first guide slope is inclined upward in a direction away from the latch 42. The door handle 3 is fixed on both sides of the door frame. The door handle 3 covers the lever 8 and the second mounting shell 2 on the same side. The door panel is located between the two second mounting shells 2. The door handle 3, the door frame and the door panel form a vertical through space.

[0038] When opening the door, extend your hand vertically into the vertically penetrating space. Your hand comes into contact with the first guide slope 81. As your hand moves vertically, the lever 8 drives the rotating column 61 to rotate. The rotating column 61 drives the first insert plate 46 to rotate. The first insert plate 46 drives the cylindrical shaft 45 to rotate. The cylindrical shaft 45 drives the rotating plate 44 to rotate. One end of the rotating plate 44 abuts against the second guide slope 431 of a guide block 43, causing the moving plate 41 to move. The moving plate 41 drives the latch 42 to move in the direction of extending into the first mounting shell 1. The other guide block 43 separates from the rotating plate 44, realizing the separation of the latch 42 from the lock hole 721. At this time, the two ends of the torsion spring 48 are compressed. Then, while keeping your hand abutting against the lever 8, hold the door handle 3. Pull the door handle 3 to open the door. This avoids pulling the parts connected to the core column when opening the door, reducing the possibility of the parts connected to the core column becoming detached or loose, and improving the service life. When the lever 8 is released, the torsion spring 48 returns to its natural state. The torsion spring 48 drives the moving plate 41 to move, and a guide block 43 pushes the rotating plate 44 to rotate. When both guide blocks 43 are in contact with the rotating plate 44, the latch 42 is in the reset state, realizing the automatic reset of the latch 42. When installing the door lock, the first lever 8 is located on one side inside the room. The first lever 8 is manually moved inside the room, causing the lifting plate 68 to rise. One lifting plate 68 drives the linkage column 69 to rise, causing the other lifting plate 68 to rise synchronously. The first locking grooves 681 of the two lifting plates 68 are respectively interference-fitted with the corresponding locking blocks 66, thereby restricting the rotation of the fixed plate 62. By restricting the lever 8 to drive the rotating column 61 to rotate, the door locking function can be realized. The second lever 8 is located on the outside side of the room, and the corresponding key needs to be inserted into the lock hole 721 to lock the door.

[0039] When installing the door lock, the fixing plate 62 is placed on the rotating column 61, and the second insert plate 63 is inserted into the second slot 612. Then, the fixing plate 62 is pushed to abut against the second limiting plate 64. Then, the first limiting plate 67 is installed in the second mounting shell 2, so that the first limiting plate 67 abuts against the snap-fit ​​block 66. When installing the rotating plate 44, the first insert plate 46 is inserted into the first slot 611, and then the two end faces of the rotating plate 44 are respectively attached to the two second guide slopes 431, thereby realizing the quick positioning of the rotating plate 44. Finally, the first mounting shell 1 and the second mounting shell 2 are covered to quickly complete the positioning and installation of the door lock.

[0040] The implementation principle of this application embodiment is as follows: When opening the door, the hand is extended vertically into the vertically penetrating space, and the hand abuts against the first guide inclined surface 81. As the hand moves vertically, the lever 8 rotates, driving the rotating component 6 to control the movement of the transmission component 4. The transmission component 4 controls the lock tongue 42 to separate from the lock hole 721. Then, while the hand is still abutting against the lever 8, the door handle 3 is held, and the door can be opened by pulling the door handle 3. This avoids pulling the parts connected to the core column when opening the door, reduces the possibility of the parts connected to the core column separating from or loosening, and improves the service life.

[0041] In this application, the door frame is the outer periphery of the door panel used for installing the door lock. It can move with the door panel and is not a door opening frame fixed at the building's doorway. Based on the specification and accompanying drawings, those skilled in the art can clearly understand the structural relationships between the door frame, door panel, door handle 3, first mounting shell 1, and second mounting shell 2 in this application.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concealed anti-pinch door lock, characterized in that: The device includes two door handles (3), a first mounting shell (1), and two second mounting shells (2). The door handles (3), the first mounting shell (1), and the second mounting shells (2) are all mounted on the door frame. A transmission assembly (4) is provided inside the first mounting shell (1). The transmission assembly (4) is connected to a latch (42). The transmission assembly (4) can drive the latch (42) to extend out of the first mounting shell (1). A rotating assembly (6) is provided inside the second mounting shell (2). The rotating assembly (6) controls the operation of the transmission assembly (4). The rotating assembly (6) is connected to a lever (8). A first guide slope (81) is provided on the top of the lever (8). The two second mounting shells (2) are located on each side of the first mounting shell (1). The door handles (3) cover the lever (8) and the second mounting shells (2) on the same side. The door handles (3), the door frame, and the door panel form a vertically penetrating space. The door panel is located between the two second mounting shells (2). The transmission assembly (4) includes a movable plate (41), which is slidably disposed in the first mounting shell (1). The movable plate (41) is connected to the locking tongue (42). Two guide blocks (43) are provided on the movable plate (41). A rotating plate (44) is provided between the two guide blocks (43). A second guide slope (431) is provided on the side of the guide block (43) facing the rotating plate (44). The rotating assembly (6) controls the rotation of the rotating plate (44); The rotating assembly (6) includes two rotating columns (61), which are connected to the toggle block (8) on the same side. The rotating column (61) extends out of the second mounting shell (2) and into the first mounting shell (1). The rotating column (61) has a first slot (611). The rotating plate (44) has a first insert plate (46) on both sides. The first insert plate (46) is inserted into the first slot (611) on the same side and is adapted to it. The rotating column (61) and the rotating plate (44) are coaxial. A fixed plate (62) is connected to the rotating column (61), and a snap-fit ​​block (66) is connected to the fixed plate (62). A lifting plate (68) is slidably arranged in both of the second mounting shells (2). The lifting plate (68) is located below the fixed plate (62). Both of the lifting plates (68) have a first snap-fit ​​groove (681) and a second snap-fit ​​groove (682). The two second snap-fit ​​grooves (682) are snapped together with a connecting column (69). The connecting column (69) is interference-fitted with the second snap-fit ​​groove (682). When the two ends of the rotating plate (44) are in contact with the two second guide slopes (431), the snap-fit ​​block (66) is facing the first snap-fit ​​groove (681). The snap-fit ​​block (66) can be inserted into the first snap-fit ​​groove (681) and interference-fitted. An adjusting component (7) for controlling the lifting of the lifting plate (68) is provided in the second mounting shell (2). The adjusting component (7) includes a first adjusting block (71) and a second adjusting block (72). The first adjusting block (71) and the second adjusting block (72) are each located in a second mounting shell (2). The second mounting shell (2) has a strip hole (22). The first adjusting block (71) extends out of the strip hole (22). The second adjusting block (72) is located in the strip hole (22). The first adjusting block (71) and the second adjusting block (72) are each fixed to a lifting plate (68). The second adjusting block (72) has a locking hole (721).

2. The concealed anti-pinch door lock according to claim 1, characterized in that: The two ends of the rotating plate (44) abut against the two second guide inclined surfaces (431) respectively. A fixing post (47) is provided inside the first mounting shell (1). A torsion spring (48) is sleeved on the fixing post (47). Both ends of the torsion spring (48) are connected to the moving plate (41).

3. The concealed anti-pinch door lock according to claim 2, characterized in that: The first mounting shell (1) has an arc-shaped groove (13) inside. The arc-shaped groove (13) is coaxially arranged with the rotating plate (44). The rotating plate (44) is provided with a guide post (410), which is inserted into the arc-shaped groove (13).

4. The concealed anti-pinch door lock according to claim 2, characterized in that: The rotating column (61) is connected to the end of the lever (8) away from its first guide slope (81).

5. The concealed anti-pinch door lock according to claim 4, characterized in that: The second mounting shell (2) has a groove (21), and the side of the first mounting shell (1) is located in the groove (21) on the same side.

6. The concealed anti-pinch door lock according to claim 1, characterized in that: The second mounting shell (2) is provided with a first limiting plate (67), the rotating column (61) is provided with a second limiting plate (64), the fixing plate (62) is connected with an abutting plate (65), the abutting plate (65) abuts against the second limiting plate (64), the first limiting plate (67) abuts against the snap-fit ​​block (66), and the fixing plate (62) is located between the first limiting plate (67) and the second limiting plate (64).

7. The concealed anti-pinch door lock according to claim 1, characterized in that: The rotating column (61) is provided with a second slot (612), the first slot (611) is provided on the end face of the rotating column (61), the second slot (612) is provided on the side of the rotating column (61), and the fixing plate (62) is provided with a second insert plate (63), which is inserted into the second slot (612) and adapted to each other.

8. The concealed anti-pinch door lock according to claim 1, characterized in that: The two second mounting shells (2) are bolted together to a first connecting plate (5). The first mounting shell (1) passes through the first connecting plate (5). A second connecting plate (11) is provided at one end of the first mounting shell (1) near the latch (42). The second connecting plate (11) is bolted to the first connecting plate (5). A dustproof gasket (12) is provided in the space between the latch (42) and the first connecting plate (5).

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