An electrical push-open door lock

Abstract

The present invention proposes an electrical push-to-open door lock, comprising a base, a shell, a locking body, a forced door opening drive plate, a push-to-open locking plate, a door opening drive plate, a positioning pin assembly, and a door closing connecting plate, wherein the locking body is provided with a flipping protrusion with a flipping point, the push-to-open locking plate is installed in the forced door opening drive plate through a first spring, one side of the door opening drive plate is connected to the inner wall of the forced door opening drive plate through a second spring, and the other side is against the side wall of the push-to-open locking plate, the positioning pin assembly is installed at one end of the door opening drive plate, and the door closing connecting plate is used to lock the positioning pin assembly; the door lock will have a knocking sound after closing the door, reminding the user that the door is closed successfully; in addition, before the door is closed in place, after the push-to-open locking plate contacts the flipping point, a force is applied to the locking body to prevent it from resetting to assist in closing the door, thereby achieving power assistance, so that the door closing force suddenly becomes smaller or even reverses, producing a suction feel, so as to remind the user that the door is closed successfully.

Description

[Technical field]

[0001] The invention relates to the technical field of door locks, in particular to an electrical push-and-pop door lock. [Background technology]

[0002] When a user operates a push-to-pop door lock installed on the door cover of a household appliance to close the door, the closing force will continue to increase until the door is locked. If during this action, 1. there is no sound prompting that the door is closed successfully, the user will use less force when closing the door, resulting in failure to close the door, and then use greater force to close the door, even far exceeding the actual closing force. 2. Because the closing force continues to increase, there is no change in the closing feel. If there is a sudden decrease or even reverse of the closing force before the door is fully closed, there will be a suction feel, which also reminds the user that the door is closed successfully. Now a push-to-pop door lock for an appliance is proposed. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide an electrical push-open door lock that can provide a door closing sound when the door is fully closed and at the same time achieve a door closing suction feeling, thereby enhancing the user experience.

[0004] To achieve the above-mentioned purpose, the present invention provides an electrical push-to-pop door lock, comprising a base, a shell installed on the base, and a locking body installed in the base and equipped with a torsion spring, the top of the shell having a lock hole for inserting a door hook, the locking body being located below the lock hole, the base also having a strong door-opening drive plate equipped with a strong door-opening spring, a push-to-pop locking plate equipped with a first spring, a door-opening drive plate equipped with a second spring, a positioning pin assembly, and a door-closing connecting plate equipped with a third spring, the strong door-opening spring and the third spring being arranged at one end of the base away from the locking body, the locking body being provided with a flipping protrusion with a flipping point, the push-to-pop locking plate being installed in the strong door-opening drive plate through the first spring, one side of the door-opening drive plate being connected to the inner wall of the strong door-opening drive plate through the second spring, and the other side being against the side wall of the push-to-pop locking plate, the positioning pin assembly being installed on one end of the door-opening drive plate facing the lock body, and the door-closing connecting plate being arranged above the door-opening drive plate for locking the positioning pin assembly;

[0005] When closing the door, under the rotation of the locking body, the flipping protrusion abuts against the push-open locking plate, and before the push-open locking plate contacts the flipping point, a force is applied to the locking body to drive it to return to its original position; after the push-open locking plate contacts the flipping point, a force is applied to the locking body to prevent it from returning to its original position; at the same time, the positioning pin assembly controls the door opening drive plate to move toward the side of the compressed second spring, so that the door opening drive plate slides out of a step from the push-open locking plate, and the door opening drive plate and the forced door opening drive plate instantly move to the left and collide to produce a sound.

[0006] Preferably, one end of the locking body has a C-shaped lock hook portion, and the other end has a flip protrusion portion, the flip protrusion portion has an upper convex arc surface above and a lower convex arc surface below, the intersection of the upper convex arc surface and the lower convex arc surface forms a flip point, and the flip protrusion is also provided with a positioning guide groove that cooperates with the positioning pin assembly. When closing the door, under the rotation of the locking body, the push-to-lock locking plate successively abuts against the upper convex arc surface, the flip point, and the lower convex arc surface of the flip protrusion. When the push-to-lock locking plate abuts against the upper convex arc surface, a force in the same direction as the torsion spring reset direction is applied to the locking body; when the push-to-lock locking plate abuts against the lower convex arc surface, a force in the opposite direction to the torsion spring reset direction is applied to the locking body.

[0007] Preferably, the push-to-open locking plate has an assisting protrusion at one end facing the locking body, and when the assisting protrusion abuts against the flipping point, the push-to-open locking plate moves rightward to a maximum position.

[0008] Preferably, one side of the push-to-pop locking plate has a baffle, which is located on the side of the door opening drive plate facing away from the second spring, and the inner side of the baffle is provided with a baffle. After the door is closed and the external force inserted into the door hook is removed, the push-to-pop locking plate moves right under the action of the resetting force of the locking body until the baffle interferes with the door opening drive plate, preventing the push-to-pop locking plate from continuing to move right and the resetting of the locking body, thereby locking the locking body.

[0009] Preferably, the door opening drive plate is also provided with an installation cavity for installing the positioning pin assembly, and the end of the door opening drive plate facing the locking body is provided with a first step and a second step that cooperate with the block frame. When the door opening drive plate moves toward the side of the compressed second spring under the action of the positioning pin assembly, the block disengages from the abutment of the first step and slides into the second step, thereby locking the push-to-pop locking plate.

[0010] Preferably, the door closing connecting plate is provided with an L-shaped limit groove, including a first limit groove and a second limit groove arranged perpendicularly to each other, the second limit groove being arranged along the moving direction of the door closing connecting plate, the first limit groove being arranged at one end of the second limit groove away from the third spring, one end of the positioning pin assembly having a positioning pin, and the other end having a protrusion inserted into the L-shaped limit groove; when the door is in the closed state, the protrusion of the positioning pin assembly is in the first limit groove, and when the door closing action is applied again from the closed state, under the action of the locking body, the protrusion of the positioning pin assembly slides out of the first limit groove, and the door closing connecting plate moves to the left under the action of the third spring until the protrusion falls into the second limit groove, and the door opening drive plate moves downward under the action of the positioning assembly until the second step disengages from the push-open drive plate, so as to release the locking of the door opening drive plate on the push-open drive plate and realize door opening; under the resetting action of the locking body, the door closing connecting plate is driven to move right and reset, and at the same time, the protrusion of the positioning pin assembly slides into the first limit groove and resets.

[0011] Preferably, the inner side of the base is provided with an impact bump for preventing the forced door opening drive plate from moving leftward. When the door is closed, under the action of the locking body, the door opening drive plate, the push-open locking plate, the door opening drive plate, the positioning pin assembly and the door closing connecting plate move right synchronously. When the door opening drive plate slides out one step from the push-open locking plate, from the first step to the second step, the door opening drive plate and the forced door opening drive plate move leftward instantaneously until the forced door opening drive plate hits the impact bump of the base, and a sound is generated by the instantaneous impact.

[0012] Preferably, it also includes a first electromagnetic mechanism, and a push rod is provided on one side of the door opening drive plate connected to the second spring, and the end of the push rod extends to the outside through a first through slot on the shell. In the unlocked state, the first electromagnetic mechanism drives the door opening drive plate to move through the push rod to open the door.

[0013] Preferably, a second electromagnetic mechanism is further included, on which a retractable piston is installed, and one side of the shell has a second through groove for the piston to be inserted, and when the piston is extended, it is inserted into the rear side of the push-open locking plate to prevent the push-open locking plate from moving to the side away from the locking body, thereby achieving door closing and locking.

[0014] Beneficial effects of the present invention: the door lock of the present invention will make an impact sound after closing the door, reminding the user that the door is closed successfully; in addition, before the door is closed, after the push-open locking plate contacts the flip point, a force is applied to the locking body to prevent it from returning to its original position to assist in closing the door, thereby achieving power assistance, so that the closing force suddenly becomes smaller or even reverses, producing a suction feeling, so as to remind the user that the door is closed successfully.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0016] Figure 1 It is an exploded schematic diagram of an electrical push-open door lock of the present invention;

[0017] Figure 2 It is a schematic diagram of an electrical push-and-pop door lock of the present invention in an initial state of the door not being closed;

[0018] Figure 3 yes Figure 2 A top view of the internal structure;

[0019] Figure 4 It is a schematic diagram of a state of an electrical push-and-pop door lock of the present invention from the closing of the door to the turning point;

[0020] Figure 5 yes Figure 4 A top view of the internal structure;

[0021] Figure 6 It is a schematic diagram of a state of an electrical push-and-pop door lock from closing the door to a flip point of the present invention;

[0022] Figure 7 yes Figure 6 A top view of the internal structure;

[0023] Figure 8 It is a schematic diagram of a state of an electrical push-and-pop door lock of the present invention from the state of the door being closed to the state of passing the flip point;

[0024] Fig. 9 It is a schematic diagram of an electrical push-and-pop door lock of the present invention from overpressure to the door closing trigger position;

[0025] Fig.10 yes Fig. 9 A top view of the internal structure;

[0026] Fig.11 It is a schematic diagram of an electrical push-and-pop door lock of the present invention returning to a door-closing position;

[0027] Fig.12 yes Fig.11 A top view of the internal structure;

[0028] Fig.13 It is a structural schematic diagram of a locking body of an electrical push-and-pop door lock of the present invention;

[0029] Fig.14 It is a structural schematic diagram of a push-to-open locking plate of an electrical push-to-open door lock of the present invention;

[0030] Fig.15 It is a structural schematic diagram of a door opening drive plate of an electrical push-open door lock of the present invention;

[0031] Fig.16 It is a structural schematic diagram of a positioning pin assembly of an electrical push-open door lock of the present invention;

[0032] Fig.17 This is a structural schematic diagram of a door closing connection plate of an electrical push-open door lock of the present invention.

[0033] Fig.18 It is a schematic diagram of an electrical push-and-pop door lock of the present invention, which is pressed from a door-closed state to a door-open triggering position;

[0034] Fig.19 yes Fig.18 A top view of the internal structure;

[0035] Fig. 20 It is a top view schematic diagram of an electrical push-and-pop door lock of the present invention in a locked state during electric locking operation;

[0036] Fig.21 The invention is a top view schematic diagram of an electrical push-and-pop door lock in an unlocked state during electric locking operation. [Specific implementation method]

[0037] See also Figures 1 to 19 The present invention discloses an electrical push-open door lock, comprising a base 1, a shell 10 installed on the base 1, and a locking body 2 installed in the base 1 and equipped with a torsion spring 20, wherein the top of the shell 10 has a lock hole 101 for inserting a door hook, and the locking body 2 is located below the lock hole 101, and the base 1 is also provided with a forced door opening drive plate 3 equipped with a forced door opening spring 30, a push-open locking plate 4 equipped with a first spring 40, a door opening drive plate 5 equipped with a second spring 50, a positioning pin assembly 6, and a door closing connecting plate 7 equipped with a third spring 70, wherein the forced door opening spring 30 and the third spring 70 are arranged at one end of the base 1 away from the locking body 2, and a flip protrusion 22 with a flip point 200 is provided on the locking body 2, the push-open locking plate 4 is installed in the forced door opening drive plate 3 through the first spring 40, and one side of the door opening drive plate 5 is connected to the second spring 50 by the second spring 50. The inner wall of the forced door opening drive plate 3 is connected, and the other side is against the side wall of the push-to-lock plate 4. The positioning pin assembly 6 is installed on the door opening drive plate 5 at one end facing the locking body 2, and the door closing connecting plate 7 is arranged above the door opening drive plate 5 to lock the positioning pin assembly 6; when closing the door, under the rotation of the locking body 2, the flip protrusion 22 is against the push-to-lock plate 4, and before the push-to-lock plate 4 contacts the flip point 200, a force is applied to the locking body 2 to drive it to reset; after the push-to-lock plate 4 contacts the flip point 200, a force is applied to the locking body 2 to prevent it from resetting; at the same time, the positioning pin assembly 6 controls the door opening drive plate 5 to move to the side of the compressed second spring 50, so that the door opening drive plate 5 slides out a step from the push-to-lock plate 4, from the first step 53 to the second step 54, and the door opening drive plate 5 and the forced door opening drive plate 3 instantly move left and collide to produce a sound.

[0038] Further, see Fig.13 One end of the locking body 2 has a C-shaped lock hook portion 21, and the other end has a flip protrusion 22. The flip protrusion 22 has an upper convex arc surface above and a lower convex arc surface below. The intersection of the upper convex arc surface and the lower convex arc surface forms a flip point 200. The flip protrusion 22 is also provided with a positioning guide groove 23 that cooperates with the positioning pin assembly 6. When closing the door, under the rotation of the locking body 2, the push-to-lock locking plate 4 is successively against the upper convex arc surface, the flip point 200, and the lower convex arc surface of the flip protrusion 22. When the push-to-lock locking plate 4 is against the upper convex arc surface, a force in the same direction as the torsion spring 20 is applied to the locking body 2; when the push-to-lock locking plate 4 is against the lower convex arc surface, a force in the opposite direction to the torsion spring 20 is applied to the locking body 2.

[0039] Further, see Figure 6The push-to-lock plate 4 has an assisting protrusion 41 at one end facing the locking body 2. When the assisting protrusion 41 abuts against the flip point 200, the push-to-lock plate 4 moves rightward to the maximum position.

[0040] Further, see Fig.14 , one side of the push-to-lock plate 4 is provided with a blocking frame 42, and the blocking frame 42 is located on the side of the door opening drive plate 5 facing away from the second spring 50. A blocking block 43 is provided on the inner side of the blocking frame 42. After the door is closed and the external force inserted into the door hook is removed, the push-to-lock plate 4 moves rightward under the action of the resetting force of the locking body 2 until the blocking block 43 interferes with the door opening drive plate 5, preventing the push-to-lock plate 4 from continuing to move rightward and the locking body 2 from resetting, thereby locking the locking body 2. See FIG. Fig.12 .

[0041] Further, see Fig.12 , Fig.14 , Fig.15 The door opening drive plate 5 is also provided with an installation cavity 51 for installing the positioning pin assembly 6. The door opening drive plate 5 is provided with a first step 53 and a second step 54 that cooperate with the blocking frame 42 at one end thereof facing the locking body 2. When the door opening drive plate 5 moves toward the side of the compressed second spring 50 under the action of the positioning pin assembly 6, the blocking block 43 disengages from the abutment of the first step 53 and slides into the second step 54, thereby locking the push-to-lock plate 4.

[0042] Further, see Fig.17 The door closing connecting plate 7 is provided with an L-shaped limiting groove, including a first limiting groove 71 and a second limiting groove 72 which are arranged perpendicularly to each other. The second limiting groove 72 is arranged along the moving direction of the door closing connecting plate 7. The first limiting groove 71 is arranged at an end of the second limiting groove 72 away from the third spring 70. One end of the positioning pin assembly 6 has a positioning pin, and the other end has a protrusion 61 which is inserted into the L-shaped limiting groove. When the door is closed, the protrusion 61 of the positioning pin assembly 6 is in the first limiting groove 71. When the door closing action is applied again from the closed state, the locking body 2, the protrusion 61 of the positioning pin assembly 6 slides out of the first limiting groove 71, and the door closing connecting plate 7 moves to the left under the action of the third spring 70 until the protrusion 61 falls into the second limiting groove 72, and the door opening driving plate 5 moves downward under the action of the positioning assembly 6 until the second step 54 escapes from the push-open driving plate 4, so as to release the lock of the push-open locking plate 4 by the door opening driving plate 5, and realize the door opening; under the resetting action of the locking body 2, the door closing connecting plate 7 is driven to move right and reset, and at the same time, the protrusion 61 of the positioning pin assembly 6 slides into the first limiting groove 71 and resets.

[0043] Furthermore, an impact bump 11 is provided on the inner side of the base 1 for preventing the forced door opening drive plate 3 from moving leftward. When the door is closed, under the action of the locking body 2, the door opening drive plate 3, the push-open locking plate 4, the door opening drive plate 5, the positioning pin assembly 6, and the door closing connecting plate 7 move rightward synchronously. When the door opening drive plate 5 slides out of the push-open locking plate 4 by one step, from the first step 53 to the second step 54, the door opening drive plate 5 and the forced door opening drive plate 3 move leftward instantly until the forced door opening drive plate 3 abuts against the impact bump 11 of the base 1. Fig.10 As shown, the instantaneous impact produces sound.

[0044] Further, see Fig. 20 and Fig.21 , further comprising a first electromagnetic mechanism 8, wherein the door opening drive plate 5 has a push rod 52 on one side connected to the second spring 50, and the end of the push rod 52 extends to the outside through the first through slot 102 on the housing 10, and in the unlocked state, the first electromagnetic mechanism 8 drives the door opening drive plate 5 to move through the push rod 52 to open the door. Further comprising a second electromagnetic mechanism 9, wherein a retractable piston 91 is mounted on the second electromagnetic mechanism 9, and one side of the housing 10 has a second through slot 103 for the piston 91 to be inserted, and when the piston 91 is extended, it is inserted into the rear side of the push-open locking plate 4 to prevent the push-open locking plate 4 from moving to the side away from the locking body 2, thereby achieving door closing and locking.

[0045] Working process of the present invention:

[0046] 1. The working principle of the door closing operation is as follows:

[0047] 1. The door hook is inserted, and the locking body 2 rotates counterclockwise. The locking body 2 pushes the push-open locking plate 4 to move right, the door closing connecting plate 7 moves right together with the positioning pin assembly 6, the push-open locking plate 4, the door opening drive plate 5 and the forced door opening drive plate 3 move right, and the forced door opening spring force 30 is compressed.

[0048] 2. After the door hook is inserted, it reaches the turning point 200, at which time the push-open locking plate 4 moves right to the maximum position.

[0049] 3. After the door hook is inserted and passes the flip point 200, the locking plate 4 is pushed to move leftward under the locking body 2 by 50N, which helps the locking body 2 rotate to the door closing trigger position.

[0050] 4. After the door hook is inserted, to the door closing trigger position: the positioning pin assembly 6 moves in the track of the positioning guide groove 23 of the locking body 2, driving the door opening drive plate 5 to move to the side of the compressed second spring 50, and making the door opening drive plate 5 slide out of the push-open locking plate 4 by one step. After the door opening drive plate 5 slides out, the door opening drive plate 5 and the forced door opening drive plate 3 continue to move left instantaneously until they reach the limit position, and the instantaneous collision produces a sound.

[0051] 5. After the insertion force is cancelled, to the door closing point: under the action of the reset torsion spring 20 of the locking body 2, the push-open locking plate 4 moves to the right until the push-open locking plate 4 and the second step 54 of the door opening drive plate 5 interfere with each other, preventing the push-open locking plate 4 from continuing to move to the right and the locking body 2 from resetting, thereby locking the locking body 2.

[0052] 2. The working principle of the door opening operation is as follows:

[0053] 1. The door closing state is: under the action of the reset torsion spring 20 of the locking body 2, the push-open locking plate 4 moves rightward until the push-open locking plate 4 and the second step 54 of the door opening drive plate 5 interfere with each other.

[0054] 2. Close the door again to the door opening position: the positioning pin assembly 6 moves to the side of the compressed second spring 50 together with the door opening drive plate 5 under the action of the positioning guide groove 23 of the locking body 2, and the positioning pin assembly 6 escapes from the door closing connecting plate 7. After the positioning pin assembly 6 escapes from the first limiting groove 71 of the door closing connecting plate 7, the door closing connecting plate 7 moves leftward under the action of the third spring 70 until the protrusion 61 falls into the second limiting groove 72 and cannot be reset. At this time, the positioning pin assembly 6 releases the lock on the locking body 2.

[0055] 3. After the door closing action disappears again: the locking body 2 is reset, the door closing connecting plate 7 is pushed back to the starting point to the right by the locking body 2, the positioning pin assembly 6 withdraws from the second limiting groove 72 of the door closing connecting plate 7, and slides into the first limiting groove 71 again under the reset action of the door opening drive plate 5, thereby realizing the reset of the positioning pin assembly 6 and the door opening drive plate 5.

[0056] 3. The working principle of electric locking operation is as follows:

[0057] The second electromagnetic mechanism 9 is actuated to insert the piston 91 behind the push-to-lock plate 4, thereby preventing the plate from moving and achieving locking.

[0058] 4. The working principle of electric door opening operation is as follows:

[0059] In the unlocked state, the first electromagnetic mechanism 8 drives the door opening drive plate 5 to open the door.

[0060] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An electrical push-open door lock, comprising a base (1), a housing (10) mounted on the base (1), and a locking body (2) mounted in the base (1) and provided with a torsion spring (20), wherein the top of the housing (10) has a lock hole (101) for inserting a door hook, and the locking body (2) is located below the lock hole (101), characterized in that: The base body (1) is also provided with a forced door opening drive plate (3) equipped with a forced door opening spring (30), a push-open locking plate (4) equipped with a first spring (40), a door opening drive plate (5) equipped with a second spring (50), a positioning pin assembly (6), and a door closing connecting plate (7) equipped with a third spring (70). The forced door opening spring (30) and the third spring (70) are arranged at one end of the base body (1) away from the locking body (2). The locking body (2) is provided with a flip point (200). The push-open locking plate (4) is installed in the forced door opening drive plate (3) through a first spring (40); one side of the door opening drive plate (5) is connected to the inner wall of the forced door opening drive plate (3) through a second spring (50), and the other side is against the side wall of the push-open locking plate (4); the positioning pin assembly (6) is installed on one end of the door opening drive plate (5) facing the locking body (2); and the door closing connecting plate (7) is arranged above the door opening drive plate (5) and is used to lock the positioning pin assembly (6); When the door is closed, under the rotation of the locking body (2), the flip protrusion (22) abuts against the push-open locking plate (4), and before the push-open locking plate (4) contacts the flip point (200), a force is applied to the locking body (2) to drive it to return to its original position; after the push-open locking plate (4) contacts the flip point (200), a force is applied to the locking body (2) to prevent it from returning to its original position; at the same time, the positioning pin assembly (6) controls the door opening drive plate (5) to move toward the side of the compressed second spring (50), so that the door opening drive plate (5) slides out of a step from the push-open locking plate (4), and the door opening drive plate (5) and the forced door opening drive plate (3) instantly move to the left and collide to produce a sound; The push-open locking plate (4) has an assisting protrusion (41) at one end facing the locking body (2), and when the assisting protrusion (41) abuts against the flip point (200), the push-open locking plate (4) moves rightward to a maximum position; After the door hook is inserted, to the door closing trigger position: the positioning pin assembly (6) moves in the trajectory of the positioning guide groove (23) of the locking body (2), driving the door opening drive plate (5) to move to the side of the compressed second spring (50), and causing the door opening drive plate (5) to slide out of the push-open locking plate (4) by one step; after the door opening drive plate (5) slides out, the door opening drive plate (5) and the forced door opening drive plate (3) continue to move left instantaneously until they reach the limit position, and a sound is generated by an instantaneous collision.

2. An electrical push-open door lock as claimed in claim 1, characterized in that: One end of the locking body (2) has a C-shaped lock hook portion (21), and the other end has a flip protrusion (22). The flip protrusion (22) has an upper convex arc surface on its upper side and a lower convex arc surface on its lower side. The intersection of the upper convex arc surface and the lower convex arc surface forms a flip point (200). The flip protrusion (22) is also provided with a positioning guide groove (23) that cooperates with the positioning pin assembly (6). When the door is closed, under the rotation of the locking body (2), the push-open locking plate (4) sequentially abuts against the upper convex arc surface, the flip point (200), and the lower convex arc surface of the flip protrusion (22). When the push-open locking plate (4) abuts against the upper convex arc surface, a force in the same direction as the resetting direction of the torsion spring (20) is applied to the locking body (2); when the push-open locking plate (4) abuts against the lower convex arc surface, a force in the opposite direction to the resetting direction of the torsion spring (20) is applied to the locking body (2).

3. The electrical push-to-open door lock according to claim 1, characterized in that: One side of the push-open locking plate (4) has a stopper (42), the stopper (42) is located on the side of the door opening drive plate (5) facing away from the second spring (50), and a stopper (43) is provided on the inner side of the stopper (42). After the door is closed and the external force of the door hook is removed, the push-open locking plate (4) moves rightward under the action of the resetting force of the locking body (2) until the stopper (43) interferes with the door opening drive plate (5), thereby preventing the push-open locking plate (4) from continuing to move rightward and the locking body (2) from resetting, thereby locking the locking body (2).

4. An electrical push-to-open door lock as claimed in claim 3, characterized in that: The door opening drive plate (5) is also provided with a mounting cavity (51) for mounting a positioning pin assembly (6). The door opening drive plate (5) is provided with a first step (53) and a second step (54) which cooperate with the stop frame (42) at one end thereof facing the locking body (2). When the door opening drive plate (5) moves toward the side of the compressed second spring (50) under the action of the positioning pin assembly (6), the stop block (43) is separated from the abutment of the first step (53) and slides into the second step (54), thereby locking the push-open locking plate (4).

5. An electrical push-to-open door lock as claimed in claim 4, characterized in that: The door closing connecting plate (7) is provided with an L-shaped limiting groove, comprising a first limiting groove (71) and a second limiting groove (72) which are arranged perpendicularly to each other, the second limiting groove (72) being arranged along the moving direction of the door closing connecting plate (7), the first limiting groove (71) being arranged at an end of the second limiting groove (72) which is away from the third spring (70), the positioning pin assembly (6) having a positioning pin at one end and a protruding portion (61) inserted into the L-shaped limiting groove at the other end; in the door closing state, the protruding portion (61) of the positioning pin assembly (6) is in the first limiting groove (71), and when the door closing action is applied again from the door closing state, under the action of the locking body (2), the locking pin assembly (6) is locked. The protruding portion (61) of the positioning pin assembly (6) slides out of the first limiting groove (71), and the door closing connecting plate (7) moves to the left under the action of the third spring (70) until the protruding portion (61) falls into the second limiting groove (72). The door opening drive plate (5) moves downward under the action of the positioning assembly (6) until the second step (54) is disengaged from the push-pull drive plate (4), thereby releasing the locking of the door opening drive plate (5) on the push-pull drive plate (4) and realizing door opening. Under the resetting action of the locking body (2), the door closing connecting plate (7) is driven to move rightward and reset, and at the same time, the protruding portion (61) of the positioning pin assembly (6) slides into the first limiting groove (71) and resets.

6. The electrical push-to-open door lock according to claim 4, characterized in that: The inner side of the base (1) is provided with an impact protrusion (11) for preventing the forced door opening drive plate (3) from moving leftward. When the door is closed, under the action of the locking body (2), the door opening drive plate (3), the push-open locking plate (4), the door opening drive plate (5), the positioning pin assembly (6), and the door closing connecting plate (7) move rightward synchronously. When the door opening drive plate (5) slides out of the push-open locking plate (4) by one step, from the first step (53) to the second step (54), the door opening drive plate (5) and the forced door opening drive plate (3) move leftward instantaneously until the forced door opening drive plate (3) abuts against the impact protrusion (11) of the base (1), and a sound is generated by the instantaneous impact.

7. An electrical push-to-open door lock according to any one of claims 1 to 6, characterized in that: The invention also comprises a first electromagnetic mechanism (8), wherein a push rod (52) is provided on one side of the door opening drive plate (5) connected to the second spring (50), and an end of the push rod (52) extends to the outside through a first through slot (102) on the housing (10); in an unlocked state, the first electromagnetic mechanism (8) drives the door opening drive plate (5) to move via the push rod (52) to open the door.

8. An electrical push-to-open door lock as claimed in claim 7, characterized in that: The invention also comprises a second electromagnetic mechanism (9), on which a retractable piston (91) is mounted, and one side of the housing (10) comprises a second through slot (103) into which the piston (91) can be inserted, and when the piston (91) is extended, it is inserted into the rear side of the push-open locking plate (4) to prevent the push-open locking plate (4) from moving to a side away from the locking body (2), thereby achieving door closing and locking.

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