CN112878814A - Electric appliance spring-pushing door lock - Google Patents

Abstract

The invention provides an electric appliance spring-pushing door lock which comprises a base body, a shell, a locking body, a strong door-opening driving plate, a spring-pushing locking plate, a door-opening driving plate, a positioning needle assembly and a door-closing connecting plate, wherein the locking body is provided with an overturning bulge part with an overturning point; the door lock can make a striking sound after closing the door, so that a user is reminded of the success of closing the door; in addition, before the door is closed in place, after the elastic push locking plate is contacted with the overturning point, a force for preventing the locking body from resetting is applied to assist the door to be closed, so that the assistance is realized, the door closing force is suddenly reduced or even reversed, the suction hand feeling is generated, and the user can be reminded of successfully closing the door.

Description

Electric appliance spring-pushing door lock

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of door locks, in particular to an electric appliance push spring door lock.

[ background of the invention ]

The spring-pushing door lock installed on the door cover of the household appliance has the advantage that the door closing force is continuously increased until the door is locked when a user operates to close the door. If in the course of this action, 1, there is no sound to indicate the door closing success, will result in the user's effort of closing the door and cause the door to close the failure with little effort, and then go to close the door with bigger effort, even far exceed the actual force of closing the door. 2. Because the door closing force is continuously increased, the hand feeling of closing the door is not changed, if the door closing force is suddenly reduced or even reversed before the door is closed in place, a suction hand feeling can be generated, and a user is reminded of the success of closing the door, so that the electric appliance push-spring door lock is provided.

[ summary of the invention ]

The invention aims to solve the problems in the prior art, and provides an electric appliance push spring door lock which can provide door closing sound when a door is closed in place, can realize door closing suction feeling and can enhance the use experience of a user.

In order to achieve the purpose, the invention provides an electric appliance spring door lock, which comprises a base body, a shell arranged on the base body, and a locking body arranged in the base body and provided with a torsional spring, wherein the top of the shell is provided with a lock hole for inserting a door hook, the locking body is positioned below the lock hole, a strong door opening driving plate provided with a strong door opening spring, a spring pushing locking plate provided with a first spring, a door opening driving plate provided with a second spring, a positioning needle assembly and a door closing connecting plate provided with a third spring are also arranged in the base body, the strong door opening spring and the third spring are arranged at one end far away from the locking body in the base body, an overturning convex part with an overturning point is arranged on the locking body, the spring pushing locking plate is arranged in the strong door opening driving plate through the first spring, one side of the door opening driving plate is connected with the inner wall of the strong, the other side of the positioning pin assembly is abutted against the side wall of the push spring locking plate, the positioning pin assembly is arranged at one end, facing the locking body, of the door opening driving plate, and the door closing connecting plate is arranged above the door opening driving plate and used for locking the positioning pin assembly;

when the door is closed, the overturning convex part is abutted against the push-spring locking plate under the rotating action of the locking body, and a force for driving the locking body to reset is applied to the locking body before the push-spring locking plate is contacted with the overturning point; after the push spring locking plate is contacted with the overturning point, a force for preventing the locking body from resetting is applied to the locking body; meanwhile, the positioning needle assembly controls the door opening driving plate to move to one side compressing the second spring, so that the door opening driving plate slides out of a step from the push elastic locking plate, and the door opening driving plate and the strong door opening driving plate instantaneously move left to collide to generate sound.

Preferably, one end of the locking body is provided with a C-shaped lock hook part, the other end of the locking body is provided with an overturning bulge, an upper convex arc surface is arranged above the overturning bulge, a lower convex arc surface is arranged below the overturning bulge, an overturning point is formed at the intersection of the upper convex arc surface and the lower convex arc surface, the overturning bulge is further provided with a positioning guide groove matched with the positioning needle assembly, when the door is closed, the projectile locking plate sequentially abuts against the upper convex arc surface, the overturning point and the lower convex arc surface of the overturning bulge under the rotation of the locking body, and when the projectile locking plate abuts against the upper convex arc surface, a force which is the same as the resetting direction of the torsion spring is applied to the locking body; when the push elastic locking plate is abutted against the lower convex cambered surface, a force opposite to the resetting direction of the torsion spring is applied to the locking body.

Preferably, the spring-pushing locking plate has a boosting protrusion at one end facing the locking body, and the spring-pushing locking plate moves to the maximum position to the right when the boosting protrusion abuts against the turning point.

Preferably, a blocking frame is arranged on one side of the push spring locking plate, the blocking frame is positioned on one side, back to the second spring, of the door opening driving plate, a stop block is arranged on the inner side of the blocking frame, and when the door is closed and the external force inserted into the door hook is removed, the push spring locking plate moves rightwards under the action of the reset force of the locking body until the stop block interferes with the door opening driving plate, so that the push spring locking plate is prevented from continuously moving rightwards and resetting the locking body, and the locking of the locking body is realized.

Preferably, the door opening driving plate is further provided with an installation cavity for installing a positioning needle assembly, one end of the door opening driving plate, facing the locking body, is provided with a first step and a second step which are matched with the blocking frame, and when the door opening driving plate moves towards one side of the second spring under the action of the positioning needle assembly, the blocking block is separated from the first step and slides into the second step, so that the push-spring locking plate is locked.

Preferably, the door-closing connecting plate is provided with an L-shaped limiting groove, which comprises a first limiting groove and a second limiting groove that are vertically arranged, the second limiting groove is arranged along the moving direction of the door-closing connecting plate, the first limiting groove is arranged at one end of the second limiting groove far away from the third spring, one end of the positioning needle assembly is provided with a positioning needle, and the other end of the positioning needle assembly is provided with a boss inserted into the L-shaped limiting groove; when the door is closed, the boss of the positioning needle assembly is positioned in the first limiting groove, when the door is closed again, under the action of the locking body, the boss of the positioning needle assembly slides out of the first limiting groove, the door closing connecting plate moves leftwards under the action of the third spring until the boss falls into the second limiting groove, and the door opening driving plate moves downwards under the action of the positioning assembly until the second step is separated from the push spring driving plate, so that the locking of the door opening driving plate on the push spring driving plate is released, and the door opening is realized; under the reset action of the locking body, the door closing connecting plate is driven to move rightwards for resetting, and meanwhile, the boss of the positioning needle assembly slides into the first limiting groove for resetting.

Preferably, the inner side of the base body is provided with a bump for preventing the forced opening door driving plate from moving left, when the door is closed, the door opening driving plate, the push spring locking plate, the door opening driving plate, the positioning pin assembly and the door closing connecting plate synchronously move right under the action of the locking body, when the door opening driving plate slides out of a step from the push spring locking plate, the door opening driving plate and the forced opening door driving plate instantaneously move left from a first step to a second step until the forced opening door driving plate abuts against the bump of the base body, and the instantaneous bump generates sound.

Preferably, the door opening device further comprises a first electromagnetic mechanism, a push rod is arranged on one side, connected with the second spring, of the door opening driving plate, the end portion of the push rod extends out of the shell through the first through groove in the shell, and in an unlocking state, the first electromagnetic mechanism drives the door opening driving plate to move through the push rod to open the door.

Preferably, the door closing device further comprises a second electromagnetic mechanism, a telescopic piston is mounted on the second electromagnetic mechanism, a second through groove into which the piston can be inserted is formed in one side of the shell, and the piston is inserted into the rear side of the push-spring locking plate when extending out, so that the push-spring locking plate is prevented from moving to the side far away from the locking body, and door closing locking is achieved.

The invention has the beneficial effects that: the door lock disclosed by the invention has impact sound after closing the door, so that a user is reminded of the success of closing the door; in addition, before the door is closed in place, after the elastic push locking plate is contacted with the overturning point, a force for preventing the locking body from resetting is applied to assist the door to be closed, so that the assistance is realized, the door closing force is suddenly reduced or even reversed, the suction hand feeling is generated, and the user can be reminded of successfully closing the door.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

[ description of the drawings ]

FIG. 1 is an exploded view of an electric deadbolt lock according to the present invention;

FIG. 2 is a schematic diagram of an initial state of an electric appliance in an open state;

FIG. 3 is a schematic top view of the internal structure of FIG. 2;

FIG. 4 is a schematic view of an electric apparatus spring door lock according to the present invention before the door is closed to the turning point;

FIG. 5 is a schematic top view of the internal structure of FIG. 4;

FIG. 6 is a schematic view of an electric apparatus door latch of the present invention being closed to a flip point;

FIG. 7 is a schematic top view of the internal structure of FIG. 6;

FIG. 8 is a schematic view of an electric apparatus door latch of the present invention closing to an over-trip position;

FIG. 9 is a schematic view of an appliance in accordance with the present invention pushing against the latch overpressure to a closed door trigger position;

FIG. 10 is a schematic top view of the internal structure of FIG. 9;

FIG. 11 is a schematic view of an appliance of the present invention after retraction of a deadbolt lock to a closed door position;

FIG. 12 is a schematic top view of the internal structure of FIG. 11;

FIG. 13 is a schematic structural diagram of a locking body of a door latch for an electric appliance according to the present invention;

FIG. 14 is a schematic view of a spring locking plate of the door latch of the present invention;

FIG. 15 is a schematic view of a door opening driving plate of an electric appliance push-spring door lock according to the present invention;

FIG. 16 is a schematic structural view of a positioning needle assembly of an electric appliance push spring door lock according to the present invention;

FIG. 17 is a schematic structural view of a door closing connection plate of a door lock with spring pushing of an electrical appliance according to the present invention

FIG. 18 is a schematic view of an electric ejection door lock of the present invention pressed from a closed position to an open position;

FIG. 19 is a schematic top view of the internal structure of FIG. 18;

FIG. 20 is a schematic top view of an appliance in accordance with the present invention showing the electric locking operation of the deadbolt lock in a locked condition;

fig. 21 is a schematic top view of an appliance in accordance with the present invention showing the electric locking operation of the deadbolt lock in an unlocked state.

[ detailed description ] embodiments

Referring to fig. 1 to 19, the electric appliance spring door lock of the present invention includes 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, the top of the housing 10 has a lock hole 101 for inserting a door hook, the locking body 2 is located below the lock hole 101, a door-opening-forcing drive plate 3 provided with a door-opening forcing spring 30, a spring-pushing locking plate 4 provided with a first spring 40, a door-opening-forcing drive plate 5 provided with a second spring 50, a positioning needle assembly 6, and a door-closing connecting plate 7 provided with a third spring 70 are further mounted in the base 1, the spring-pushing spring 30 and the third spring 70 are disposed at one end of the base 1 far from the locking body 2, the locking body 2 is provided with a turning convex portion 22 having a turning point 200, the spring-pushing locking plate 4 is mounted in the door-opening-forcing drive plate 3 through, one side of the door opening driving plate 5 is connected with the inner wall of the strong door opening driving plate 3 through a second spring 50, the other side of the door opening driving plate is abutted against the side wall of the push elastic locking plate 4, the positioning needle assembly 6 is installed on one end, facing the locking body 2, of the door opening driving plate 5, and the door closing connecting plate 7 is arranged above the door opening driving plate 5 and used for locking the positioning needle assembly 6; when the door is closed, under the rotation action of the locking body 2, the overturning convex part 22 is abutted against the push spring locking plate 4, and before the push spring locking plate 4 is contacted with the overturning point 200, a force for driving the locking body 2 to reset is applied; after the elastic push locking plate 4 is contacted with the turnover point 200, a force for preventing the locking body 2 from resetting is applied to the locking body; meanwhile, the positioning needle assembly 6 controls the door opening driving plate 5 to move to one side compressing the second spring 50, so that the door opening driving plate 5 slides out of the elastic push locking plate 4 by one step, and the door opening driving plate 5 and the strong door opening driving plate 3 instantaneously move left to collide to generate sound from the first step 53 to the second step 54.

Further, referring to fig. 13, one end of the locking body 2 is provided with a C-shaped locking hook portion 21, the other end of the locking body is provided with an overturning protrusion 22, an upper arc surface is arranged above the overturning protrusion 22, a lower arc surface is arranged below the overturning protrusion 22, an overturning point 200 is formed at a junction of the upper arc surface and the lower arc surface, the overturning protrusion 22 is further provided with a positioning guide groove 23 matched with the positioning needle assembly 6, when the door is closed, under the rotation of the locking body 2, the projectile locking plate 4 is sequentially abutted against the upper arc surface, the overturning point 200 and the lower arc surface of the overturning protrusion 22, and when the projectile locking plate 4 is abutted against the upper arc surface, a force in the same direction as the reset direction of the torsion spring 20 is applied to the locking body 2; when the push elastic locking plate 4 is abutted against the lower convex cambered surface, a force opposite to the resetting direction of the torsion spring 20 is applied to the locking body 2.

Further, referring to fig. 6, the end of the ejector lock plate 4 facing the lock body 2 has a power-assisted protrusion 41, and when the power-assisted protrusion 41 abuts against the turning point 200, the ejector lock plate 4 moves to the maximum position to the right.

Further, referring to fig. 14, one side of the ejector locking plate 4 is provided with a blocking frame 42, the blocking frame 42 is located on the side of the door opening driving plate 5 opposite to the second spring 50, a stop block 43 is arranged on the inner side of the blocking frame 42, and when the external force for inserting the door hook is removed after the door is closed, the ejector locking plate 4 moves to the right under the action of the reset force of the locking body 2 until the stop block 43 interferes with the door opening driving plate 5, so that the ejector locking plate 4 is prevented from moving to the right continuously and the locking body 2 is reset, and the locking body 2 is locked, see fig. 12.

Further, referring to fig. 12, 14 and 15, the door opening driving plate 5 is further provided with a mounting cavity 51 for mounting the positioning needle assembly 6, one end of the door opening driving plate 5 facing the locking body 2 is provided with a first step 53 and a second step 54 which are matched with the stop frame 42, and when the door opening driving plate 5 moves to the side where the second spring 50 is compressed under the action of the positioning needle assembly 6, the stop block 43 is separated from the abutment of the first step 53 and slides into the second step 54, so that the lock of the push spring locking plate 4 is realized.

Further, referring to fig. 17, the door-closing connecting plate 7 is provided with an L-shaped limiting groove, which includes a first limiting groove 71 and a second limiting groove 72 that are vertically arranged, 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 one end of the second limiting groove 72 far from the third spring 70, one end of the positioning needle assembly 6 is provided with a positioning needle, and the other end is provided with a boss 61 inserted into the L-shaped limiting groove; when the door is closed, the boss 61 of the positioning pin assembly 6 is located in the first limit groove 71, when the door is closed again, under the action of the locking body 2, the boss 61 of the positioning pin assembly 6 slides out of the first limit groove 71, the door closing connecting plate 7 moves leftwards under the action of the third spring 70 until the boss 61 falls into the second limit groove 72, and the door opening driving plate 5 moves downwards under the action of the positioning assembly 6 until the second step 54 is separated from the push spring driving plate 4, so that the locking of the door opening driving plate 5 on the push spring locking plate 4 is released, and the door is opened; under the reset action of the locking body 2, the door closing connecting plate 7 is driven to move rightwards for resetting, and meanwhile, the boss 61 of the positioning needle assembly 6 slides into the first limiting groove 71 for resetting.

Furthermore, the inner side of the base body 1 is provided with a bump 11 for preventing the forced door opening driving plate 3 from moving left, when the door is closed, under the action of the locking body 2, the door opening driving plate 3, the ejection locking plate 4, the door opening driving plate 5, the positioning needle assembly 6 and the door closing connecting plate 7 synchronously move right, when the door opening driving plate 5 slides out of the ejection locking plate 4 by a step, the door opening driving plate 5 and the forced door opening driving plate 3 instantaneously move left from the first step 53 to the second step 54 until the forced door opening driving plate 3 abuts against the bump 11 of the base body 1, as shown in fig. 10, the instantaneous impact generates sound.

Further, referring to fig. 20 and 21, the door opening driving plate 5 further includes a first electromagnetic mechanism 8, a push rod 52 is disposed on one side of the door opening driving plate 5, where the second spring 50 is connected to the side of the door opening driving plate, an end of the push rod 52 extends to the outside through a first through groove 102 on the housing 10, and in an unlocked state, the first electromagnetic mechanism 8 drives the door opening driving plate 5 to move through the push rod 52, so as to open the door. The door closing mechanism further comprises a second electromagnetic mechanism 9, a telescopic piston 91 is mounted on the second electromagnetic mechanism 9, a second through groove 103 for inserting the piston 91 is formed in one side of the shell 10, and the piston 91 is inserted into the rear side of the push spring locking plate 4 when extending out, so that the push spring locking plate 4 is prevented from moving to the side far away from the locking body 2, and door closing locking is achieved.

The working process of the invention is as follows:

firstly, the working principle of door closing operation is as follows:

1. the door hook is inserted, the locking body 2 rotates anticlockwise, the locking body 2 pushes the push spring locking plate 4 to move rightwards, the door closing connecting plate 7 moves rightwards together with the positioning needle assembly 6, the push spring locking plate 4, the door opening driving plate 5 and the strong door opening driving plate 3 move rightwards, and the strong door opening spring force 30 is compressed.

2. After the door hook is inserted, the door hook is turned over to the turning point 200, and the push-spring locking plate 4 moves to the maximum position to the right.

3. After the door hook is inserted and the door hook passes through the turning point 200, the push-spring locking plate 4 moves to the left below the locking body 2 by 50N, and the push-assisted locking body 2 rotates to a door closing triggering position.

4. After the door hook is inserted, the door closing trigger position is as follows: the positioning pin assembly 6 moves in the track of the positioning guide groove 23 of the locking body 2, drives the door opening driving plate 5 to move to the side compressing the second spring 50, and slides the door opening driving plate 5 out of a step from the push-spring locking plate 4. After the door opening driving plate 5 slides out, the door opening driving plate 5 and the strong door opening driving plate 3 continue to move leftwards instantly until reaching a limiting position, and sound is generated by instant impact.

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-spring locking plate 4 moves rightwards until the push-spring locking plate 4 interferes with the second step 54 of the door opening driving plate 5, so that the push-spring locking plate 4 is prevented from continuing moving rightwards and the locking body 2 is prevented from resetting, and the locking body 2 is locked.

Secondly, the working principle of the door opening operation is as follows:

1. the door closing state is as follows: the push latch plate 4 moves right by the reset torsion spring 20 of the locking body 2 until the push latch plate 4 interferes with the second step 54 of the door opening actuating plate 5.

2. Closing the door again to the door opening position: the positioning pin assembly 6 moves together with the door opening driving plate 5 to the side of compressing the second spring 50 by the positioning guide groove 23 of the locking body 2, and the positioning pin assembly 6 is released from the door closing link plate 7. After the positioning pin assembly 6 is disengaged from the first limit groove 71 of the door-closing connecting plate 7, the door-closing connecting plate 7 moves to the left under the action of the third spring 70 until the boss 61 falls into the second limit groove 72 and cannot be reset, and at this time, the positioning pin assembly 6 releases the locking of the locking body 2.

3. After the door closing action disappears again: the locking body 2 resets, the door closing connecting plate 7 is pushed back to the starting point rightwards by the locking body 2, the positioning needle 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 driving plate 5, and the resetting of the positioning needle assembly 6 and the door opening driving plate 5 is realized.

Thirdly, the working principle of the electric locking operation is as follows:

the second electromagnetic mechanism 9 operates to insert the piston 91 behind the push-spring lock plate 4 to prevent the movement thereof, thereby achieving locking.

Fourthly, the working principle of the electric door opening operation is as follows:

in the unlocking state, the first electromagnetic mechanism 8 drives the door opening driving plate 5 to realize door opening.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims (9)

1. The utility model provides an electrical apparatus pushes away bullet lock, includes base member (1), installs casing (10) on base member (1) and installs locking body (2) that set torsional spring (20) in base member (1), the top of casing (10) has lockhole (101) that can supply the door hook to insert, locking body (2) are located the below of lockhole (101), its characterized in that: the strong door opening driving plate (3) provided with a strong door opening spring (30), a push spring locking plate (4) provided with a first spring (40), a door opening driving plate (5) provided with a second spring (50), a positioning needle assembly (6) and a door closing connecting plate (7) provided with a third spring (70) are further arranged in the base body (1), the strong door opening spring (30) and the third spring (70) are arranged at one end, far away from the locking body (2), in the base body (1), the locking body (2) is provided with an overturning bulge part (22) with an overturning point (200), the push spring locking plate (4) is arranged in the strong door opening driving plate (3) through the first spring (40), one side of the door opening locking plate (5) is connected with the inner wall of the strong door opening driving plate (3) through the second spring (50), and the other side of the push spring locking plate (4) is abutted against the side wall of the push, the positioning needle assembly (6) is arranged on one end of the door opening driving plate (5) facing the locking body (2), and the door closing connecting plate (7) is arranged above the door opening driving plate (5) and used for locking the positioning needle assembly (6);

when the door is closed, under the rotating action of the locking body (2), the overturning convex part (22) is abutted against the push-spring locking plate (4), and before the push-spring locking plate (4) is contacted with the overturning point (200), a force for driving the locking body (2) to reset is applied; after the elastic push locking plate (4) is contacted with the turning point (200), a force for preventing the locking body (2) from resetting is applied; meanwhile, the positioning needle assembly (6) controls the door opening driving plate (5) to move to one side compressing the second spring (50), so that the door opening driving plate (5) slides out of a step from the push spring locking plate (4), and the door opening driving plate (5) and the strong door opening driving plate (3) instantaneously move leftwards to collide to generate sound.

2. The electric appliance spring door lock as claimed in claim 1, wherein: the spring pushing locking plate is characterized in that a C-shaped locking hook part (21) is arranged at one end of the locking body (2), a turnover protruding part (22) is arranged at the other end of the locking body, an upper convex arc surface is arranged above the turnover protruding part (22), a lower convex arc surface is arranged below the turnover protruding part, a turnover point (200) is formed at the intersection of the upper convex arc surface and the lower convex arc surface, a positioning guide groove (23) matched with the positioning needle assembly (6) is further arranged on the turnover protruding part (22), when the door is closed, under the rotation of the locking body (2), the spring pushing locking plate (4) is abutted against the upper convex arc surface, the turnover point (200) and the lower convex arc surface of the turnover protruding part (22) in sequence, and when the spring pushing locking plate (4) is abutted against the upper convex arc surface, a force in the same direction as; when the push elastic locking plate (4) is abutted against the lower convex cambered surface, a force opposite to the resetting direction of the torsion spring (20) is applied to the locking body (2).

3. The electric appliance spring door lock as claimed in claim 1, wherein: and one end of the push-spring locking plate (4) facing the locking body (2) is provided with a power-assisted protruding part (41), and when the power-assisted protruding part (41) abuts against the overturning point (200), the push-spring locking plate (4) moves to the maximum position rightwards.

4. The electric appliance spring door lock as claimed in claim 1, wherein: one side of the push spring locking plate (4) is provided with a blocking frame (42), the blocking frame (42) is positioned on one side, back to the second spring (50), of the door opening driving plate (5), a stop block (43) is arranged on the inner side of the blocking frame (42), after the door is closed, when the external force for inserting the door hook is removed, the push spring locking plate (4) moves rightwards under the action of the reset force of the locking body (2) until the stop block (43) interferes with the door opening driving plate (5), the push spring locking plate (4) is prevented from continuing to move rightwards and reset of the locking body (2), and locking of the locking body (2) is achieved.

5. The electric appliance spring door lock as claimed in claim 4, wherein: the door opening driving plate (5) is further provided with an installation cavity (51) used for installing the positioning needle assembly (6), one end, facing the locking body (2), of the door opening driving plate (5) is provided with a first step (53) and a second step (54) which are matched with the blocking frame (42), and when the door opening driving plate (5) moves towards one side of the second spring (50) under the action of the positioning needle assembly (6), the blocking block (43) is separated from the abutting of the first step (53) and slides into the second step (54), so that the push spring locking plate (4) is locked.

6. The electric appliance spring door lock as claimed in claim 5, wherein: an L-shaped limiting groove is formed in the door closing connecting plate (7) and comprises a first limiting groove (71) and a second limiting groove (72) which are vertically arranged, 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 one end, away from the third spring (70), of the second limiting groove (72), a positioning needle is arranged at one end of the positioning needle assembly (6), and a protruding part (61) inserted into the L-shaped limiting groove is arranged at the other end of the positioning needle assembly; when the door is closed, the boss (61) of the positioning needle assembly (6) is positioned in the first limiting groove (71), when the door is closed again under the action of the locking body (2), the boss (61) of the positioning needle assembly (6) slides out of the first limiting groove (71), the door closing connecting plate (7) moves leftwards under the action of the third spring (70) until the boss (61) falls into the second limiting groove (72), the door opening driving plate (5) moves downwards under the action of the positioning assembly (6) until the second step (54) is separated from the push spring driving plate (4), so that the locking of the door opening driving plate (5) on the push spring driving plate (4) is released, and the door is opened; under the reset action of the locking body (2), the door closing connecting plate (7) is driven to move rightwards for resetting, and meanwhile, the boss (61) of the positioning needle assembly (6) slides into the first limiting groove (71) for resetting.

7. The electric appliance spring door lock as claimed in claim 5, wherein: the inner side of the base body (1) is provided with a bump (11) for preventing the forced door opening driving plate (3) from moving left, when the door is closed, under the action of the locking body (2), the door opening driving plate (3), the push spring locking plate (4), the door opening driving plate (5), the positioning needle assembly (6) and the door closing connecting plate (7) synchronously move right, when the door opening driving plate (5) slides out of a step from the push spring locking plate (4), the door opening driving plate (5) and the forced door opening driving plate (3) move left instantly from a first step (53) to a second step (54), and the forced door opening driving plate (3) and the bump (11) of the base body (1) are abutted, so that sound is generated by instant impact.

8. An electric appliance ejection door lock according to any one of claims 1 to 7, characterized in that: the door opening mechanism is characterized by further comprising a first electromagnetic mechanism (8), a push rod (52) is arranged on one side, connected with a second spring (50), of the door opening driving plate (5), the end portion of the push rod (52) extends out of the shell through a first through groove (102) in the shell (10), and in the unlocking state, the first electromagnetic mechanism (8) drives the door opening driving plate (5) to move through the push rod (52), so that door opening is achieved.

9. The electric appliance spring door lock as claimed in claim 8, wherein: still include second electromagnetic mechanism (9), install telescopic piston (91) on second electromagnetic mechanism (9), one side of casing (10) has and can supply piston (91) male second to lead to groove (103), insert the rear side that pushes away bullet lockplate (4) when piston (91) stretch out to the prevention pushes away bullet lockplate (4) and removes to the one side of keeping away from locking body (2), realizes closing the door and locks.

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