An electric door lock

Abstract

The present invention provides an electric door lock, which includes a base body, a housing, a locking body, an opening connection plate, a locking plate, and a slider. A buffer groove is provided in the base body. The locking body is movably installed in the buffer groove through a support shaft and can rotate around the axis of the support shaft. The pulling direction of the tension spring on the locking body is the same as the insertion direction of the door hook when closing the door. The opening connection plate is rotatably arranged in the base body. The slider is arranged on one side of the opening connection plate and moves under the action of the opening connection plate. When closing the door, the locking body moves to the locking position at one end of the buffer groove under the action of the door hook and the pulling force of the tension spring, locking the door hook. At the same time, the locking plate locks the locking body. When opening the door, the locking body moves to the unlocking position at the other end of the buffer groove in the opposite direction of the pulling force of the tension spring under the action of the door hook and disengages from the door hook. Only a very small closing force is required to close the door, and there is an obvious sense of suction when closing the door, improving the closing feel.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, and in particular to an electric door lock. Background Art

[0002] Household appliances, such as dishwashers, washing machines, refrigerators, etc., have doors, lids, hinges, etc. to allow loading or unloading. To achieve the purpose of closing the door, the doors, lids, hinges, etc. are operated in combination with a lock. Taking a dishwasher as an example, the existing door lock structure of a dishwasher generally adopts a method of protruding a door lock buckle and a door lock outward to realize the locking of the door body. When opening the door, the locking force of the door lock can be overcome to open the door. When closing the door, a similar locking force needs to be applied to the door body of the dishwasher to close the door, and there is no obvious suction feeling on the door body, making the user unable to feel whether the door has been closed in place, and the closing experience is poor. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the prior art, and propose an electric door lock, which only needs to provide a very small closing force to close the door, and there is an obvious suction feeling when closing the door, improving the closing feel.

[0004] To achieve the above purpose, the present invention proposes an electric door lock, including a base body, a housing installed outside the base body, and a locking body provided with a tension spring, a locking plate provided with a first spring, and a slider provided with a second spring installed inside the base body. A buffer groove is provided in the base body. The locking body is movably installed in the buffer groove through a support shaft and can rotate around the axis of the support shaft. The outer wall of the base body has a lock hole for the locking body to extend out to lock the door hook. The pulling direction of the tension spring on the locking body is the same as the insertion direction of the door hook when closing the door. When closing the door, the door hook first triggers the slider to disengage from the abutment against the locking plate. Under the action of the door hook and the pulling force of the tension spring, the locking body moves to the locking position at one end of the buffer groove and then rotates around the axis of the support shaft to the closed state, abuts against the door hook and provides a continuous inward closing force. When opening the door, the door hook first disengages from the abutment against the slider. The slider resets and locks the locking plate. Under the action of the door hook, the locking body moves in the opposite direction of the pulling force of the tension spring to the opening position at the other end of the buffer groove. Then, under the simultaneous action of the locking plate and the door hook, the locking body rotates around the axis of the support shaft to the open state, and the locking body and the door hook are disengaged.

[0005] Preferably, it further includes a closing connecting plate provided with a torsion spring. The outer wall of the base body also has a through groove for one end of the closing connecting plate to extend out. The closing connecting plate is rotatably arranged inside the base body. The slider is arranged on one side of the closing connecting plate and moves under the action of the closing connecting plate. When closing the door, the door hook first triggers the closing connecting plate to abut against it. Under the action of the closing connecting plate, the slider disengages from the abutment against the locking plate. When opening the door, the door hook first disengages from the abutment against the closing connecting plate. The closing connecting plate returns to the open state under the action of the torsion spring.

[0006] Preferably, the torsion spring is arranged at the bottom of the door-closing connecting plate. One side of the door-closing connecting plate extends outward to form a first push plate, and the other side has a pressing block. The first push plate extends out of the base through the through groove. When closing the door, the door hook abuts against the first push plate, pushing the door-closing connecting plate to rotate, and the slider moves toward the side away from the locking plate under the action of the pressing block until the pressing block rotates above the first bracket on one side of the slider and abuts against the top of the first bracket to lock the slider.

[0007] Preferably, a driving inclined surface for controlling the movement of the slider is provided below the end of the pressing block, and a guiding inclined surface matching with the driving inclined surface is provided above the first bracket.

[0008] Preferably, the locking body is in a C-shaped structure, with a locking hook portion at one end and a locking protrusion portion at the other end. The locking hook portion extends out of the base through the locking hole. When the locking body moves to the locking position, the locking hook portion cooperates with the door hook to lock the door hook, and the locking protrusion portion abuts against the locking plate to prevent the locking body from rotating, locking the locking body.

[0009] Preferably, a groove for inserting the locking protrusion portion of the locking body is provided on the door hook.

[0010] Preferably, a limiting protrusion portion is provided on the outer side of the locking protrusion portion, and a limiting stepped groove for preventing the locking body from rotating is provided in the base. When the limiting protrusion portion abuts against the limiting stepped groove, the locking body rotates to the limit position. At this time, under the insertion action of the door hook and the pulling force of the tension spring, the locking body moves to the locking position.

[0011] Preferably, a locking groove is provided on one side of the locking plate facing the slider. When the slider pops up and inserts into the locking groove, the locking plate is locked.

[0012] Preferably, a signal switch assembly is further provided in the base. A static contact assembly and a moving contact assembly are provided on the signal switch assembly. When the static contact assembly and the moving contact assembly are in contact, a door-closing signal is sent. When the slider pops up, the moving contact assembly is separated from the static contact assembly under the abutting action of the second bracket on one side of the slider, sending an open-door signal.

[0013] Advantages of the present invention: Through the cooperation of the locking body, the door-closing connecting plate, the locking plate, the slider, etc., the pulling force of the tension spring can be used as power when closing the door, and the user only needs to provide a very small door-closing force to close the door. When opening the door, it is necessary to overcome the pulling force of the tension spring, so a relatively large external force is required to unlock. And there is an obvious suction feeling when closing the door, improving the door-closing feel. And the door hook has no convex structure as a whole, which can avoid the problem of scratching the user when in use.

[0014] 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

[0015] Figure 1 is a schematic structural diagram of an electric door lock according to the present invention;

[0016] Figure 2 is a top view schematic diagram of the internal structure when the present invention is in the closed state;

[0017] Figure 3 is a front view schematic diagram when the present invention is in the closed state;

[0018] Figure 4 is a bottom view schematic diagram when the present invention is in the closed state;

[0019] Figure 5 is Figure 4 a sectional view taken along the AT-AT direction;

[0020] Figure 6 is Figure 4 a sectional view taken along the AZ-AZ direction;

[0021] Figure 7 is Figure 4 a sectional view taken along the BA-BA direction;

[0022] Figure 8 is a top view schematic diagram of the internal structure when the present invention is in the open state;

[0023] Figure 9 is a front view schematic diagram when the present invention is in the open state;

[0024] Figure 10 is a bottom view schematic diagram when the present invention is in the open state;

[0025] Figure 11 is Figure 10 a sectional view taken along the AT’-AT’ direction;

[0026] Figure 12 is Figure 10 a sectional view taken along the AZ’-AZ’ direction;

[0027] Figure 13 is Figure 10 a sectional view taken along the BA’-BA’ direction;

[0028] Figure 14 is an exploded view of an electric door lock according to the present invention;

[0029] Figure 15 is a three-dimensional structural schematic diagram of the closing connecting plate of an electric door lock according to the present invention;

[0030] Figure 16 is a three-dimensional structural schematic diagram of the slider of an electric door lock according to the present invention. Detailed implementation mode

[0031] Embodiment 1

[0032] Refer to Figures 1 to 16 An electric door lock of the present invention includes a base body 1, a housing 10 installed outside the base body 1, and a locking body 2 equipped with a tension spring 20, a closing connecting plate 3 equipped with a torsion spring 30, a locking plate 4 equipped with a first spring 40, and a slider 5 equipped with a second spring 50 installed inside the base body 1. A buffer groove 11 is provided inside the base body 1. The locking body 2 is movably installed in the buffer groove 11 through a support shaft 21 and can rotate around the axis of the support shaft 21. The outer wall of the base body 1 has a lock hole 101 for the locking body 2 to extend out to lock the door hook, and a through groove 102 for one end of the closing connecting plate 3 to extend out. The pulling direction of the tension spring 20 on the locking body 2 is the same as the insertion direction of the door hook when closing the door. The closing connecting plate 3 is rotatably arranged inside the base body 1. The slider 5 is arranged on one side of the closing connecting plate 3 and moves under the action of the closing connecting plate 3;

[0033] When closing the door, the door hook first triggers and abuts against the closing connecting plate 3. Under the action of the closing connecting plate 3, the slider 5 disengages from the abutment against the locking plate 4. Under the action of the door hook and the pulling force of the tension spring 20, the locking body 2 moves to the locking position at one end of the buffer groove 11, and then rotates around the axis of the support shaft 21 to the closed state, abuts against the door hook and provides a continuous inward closing force.

[0034] When opening the door, the door hook first disengages from the abutment against the closing connecting plate 3. The closing connecting plate 3 returns to the open state under the action of the torsion spring 30. The slider 5 resets and locks the locking plate 4. Under the action of the door hook, the locking body 2 moves in the opposite direction of the pulling force of the tension spring 20 to the opening position at the other end of the buffer groove 11. Then, under the simultaneous action of the locking plate 4 and the door hook, the locking body 2 rotates around the axis of the support shaft 21 to the open state, and the locking body 2 and the door hook are disengaged.

[0035] Further, refer to Figures 5 - 7 , the locking body 2 has a C-shaped structure, one end has a locking hook portion 22, and the other end has a locking protrusion portion 23. The locking hook portion 22 extends out of the base body 1 through the lock hole 101. When the locking body 2 moves to the locking position, the locking hook portion 22 cooperates with the door hook to lock the door hook, and the locking protrusion portion 23 abuts against the locking plate 4 to prevent the locking body 2 from rotating and lock the locking body 2.

[0036] Further, the door hook has a groove for the locking protrusion portion 23 of the locking body 2 to insert. Adopting this structure can make the surface of the door hook have no protruding structure and avoid the problem of scratching the user by the door hook during use.

[0037] Further, refer to Figures 5 - 7, an outer side of the locking protrusion 23 is provided with a limiting protrusion 24, and a limiting stepped groove 12 for preventing the locking body 2 from rotating is arranged in the base body 1. When the limiting protrusion 24 abuts against the limiting stepped groove 12, the locking body 2 rotates to an extreme position. At this time, under the insertion action of the door hook and the pulling force of the tension spring 20, the locking body 2 moves to the locking position.

[0038] Further, referring to Figure 2 and Figure 15 , the torsion spring 30 is arranged at the bottom of the closing connecting plate 3. One side of the closing connecting plate 3 extends outwards to form a first push plate 31, and the other side is provided with a pressing block 32. The first push plate 31 extends out of the base body 1 through the through groove 102. When closing the door, the door hook abuts against the first push plate 31, pushing the closing connecting plate 3 to rotate, and the slider 5 moves towards the side away from the locking plate 4 under the action of the pressing block 32 until the pressing block 32 rotates above the first bracket 51 on one side of the slider 5 and abuts against the top of the first bracket 51 to lock the slider 5. Specifically, in this embodiment, a driving inclined surface 320 for controlling the movement of the slider 5 is arranged below the end of the pressing block 32, and a guiding inclined surface 510 matched with the driving inclined surface 320 is arranged above the first bracket 51, which has a certain guiding effect and can make the cooperation action of the closing connecting plate and the slider smoother.

[0039] Further, in this embodiment, referring to Figure 2 , the slider 5 and the locking plate 4 are locked by means of plug-in cooperation. Specifically, a locking groove 41 is arranged on one side of the locking plate 4 facing the slider 5. When the slider 5 pops up and is inserted into the locking groove 41, the locking plate 4 is locked. Of course, a structure in which a groove body is arranged on the slider 5 and a convex body is arranged on the locking plate 4 can also be adopted to achieve the cooperation locking.

[0040] Further, a signal switch assembly 6 is further arranged in the base body 1. A static contact assembly 61 and a moving contact assembly 62 are arranged on the signal switch assembly 6. When the static contact assembly 61 and the moving contact assembly 62 are in contact, a closing signal is sent out. When the slider 5 pops up, under the abutting action of the second bracket 52 on one side of the slider 5, the moving contact assembly 62 is separated from the contact with the static contact assembly 61, and an opening signal is sent out.

[0041] Embodiment 2

[0042] On the basis of Embodiment 1, the structure is simplified, the closing connecting plate 3 as a conversion auxiliary linkage structure is removed, and the door hook can directly drive the slider 5 to act, and other working principles are the same as those of Embodiment 1.

[0043] Specifically, in this embodiment, an electric door lock includes a base body 1, a housing 10 installed outside the base body 1, and a locking body 2 equipped with a tension spring 20, a locking plate 4 equipped with a first spring 40, and a slider 5 equipped with a second spring 50, which are installed inside the base body 1. A buffer groove 11 is provided in the base body 1. The locking body 2 is movably installed in the buffer groove 11 through a support shaft 21 and can rotate around the axis of the support shaft 21. The outer wall of the base body 1 has a lock hole 101 through which the locking body 2 can extend to lock the door hook. The pulling direction of the tension spring 20 on the locking body 2 is the same as the insertion direction of the door hook when closing the door.

[0044] When closing the door, the door hook first triggers the slider 5 to disengage from the abutment against the locking plate 4. Under the action of the door hook and the pulling force of the tension spring 20, the locking body 2 moves to the locking position at one end of the buffer groove 11 and then rotates around the axis of the support shaft 21 to the closed-door state, abuts against the door hook and provides a continuous inward closing force.

[0045] When opening the door, the door hook first disengages from the abutment against the slider 5. The slider 5 resets and locks the locking plate 4. Under the action of the door hook, the locking body 2 moves in the opposite direction of the pulling force of the tension spring 20 to the opening position at the other end of the buffer groove 11. Then, under the simultaneous action of the locking plate 4 and the door hook, the locking body 2 rotates around the axis of the support shaft 21 to the open-door state, and the locking body 2 and the door hook are disengaged.

[0046] The working principle of the present invention (taking Embodiment 1 as an example):

[0047] When closing the door, the door hook first triggers the closing connecting plate 3 to abut against its first push plate 31, causing the closing connecting plate 3 to rotate. Under the action of the pressing block 32 of the closing connecting plate 3, the slider 5 moves downward and disengages from the abutment against the locking groove 41 of the locking plate 4. Under the action of the door hook and the pulling force of the tension spring 20, the locking body 2 moves to the locking position at one end of the buffer groove 11 and then rotates around the axis of the support shaft 21 to the closed-door state, abuts against the door hook and provides a continuous inward closing force. And after the locking plate 4 disengages from the abutment of the slider 5, it pops out under the action of the first spring 40 and abuts against the locking body 2 to lock the locking body 2. At this time, it is in the closed-door state, as Figure 2 shown.

[0048] When opening the door, the door hook first disengages from the abutment against the first push plate 31 of the closing connecting plate 3. The closing connecting plate 3 returns to the open-door state under the action of the torsion spring 30, and the pressing block 32 disengages from the abutment against the slider 5. The slider 5 resets and pops up and inserts into the locking groove 41 to lock the locking plate 4. Under the action of the door hook, the locking body 2 moves in the opposite direction of the pulling force of the tension spring 20 to the opening position at the other end of the buffer groove 11. Then, under the simultaneous action of the locking plate 4 and the door hook, the locking body 2 rotates around the axis of the support shaft 21 to the open-door state, and the locking body 2 and the door hook are disengaged. At this time, it is in the open-door state, as Figure 8 shown.

[0049] The above embodiments are illustrative of the present invention and not restrictive thereof. Any solution obtained by simply transforming the present invention falls within the protection scope of the present invention.

Claims

1. An electrical door lock, characterized in that: It includes a base body (1), a housing (10) installed outside the base body (1), a locking body (2) equipped with a tension spring (20) installed inside the base body (1), a locking plate (4) equipped with a first spring (40), and a slider (5) equipped with a second spring (50). A buffer groove (11) is provided in the base body (1). The locking body (2) is movably installed in the buffer groove (11) through a support shaft (21) and can rotate around the axis of the support shaft (21). The outer wall of the base body (1) has a lock hole (101) through which the locking body (2) can extend to lock the door hook. The pulling direction of the tension spring (20) on the locking body (2) is the same as the insertion direction of the door hook when closing the door. When closing the door, the door hook first triggers the slider (5) to disengage from the abutment against the locking plate (4). Under the action of the door hook and the pulling force of the tension spring (20), the locking body (2) moves to the locking position at one end of the buffer groove (11), and then rotates around the axis of the support shaft (21) to the closed door state, abuts against the door hook and provides a continuous inward closing force. When opening the door, the door hook first disengages from the abutment against the slider (5). The slider (5) resets and locks the locking plate (4). Under the action of the door hook, the locking body (2) moves in the opposite direction of the pulling force of the tension spring (20) to the opening position at the other end of the buffer groove (11). Then, under the simultaneous action of the locking plate (4) and the door hook, the locking body (2) rotates around the axis of the support shaft (21) to the open door state, and the locking body (2) and the door hook are disengaged. It also includes a closing connecting plate (3) equipped with a torsion spring (30). The outer wall of the base body (1) also has a through groove (102) through which one end of the closing connecting plate (3) can extend. The closing connecting plate (3) is rotatably arranged inside the base body (1). The slider (5) is arranged on one side of the closing connecting plate (3) and moves under the action of the closing connecting plate (3). When closing the door, the door hook first triggers the closing connecting plate (3) to abut against it. Under the action of the closing connecting plate (3), the slider (5) disengages from the abutment against the locking plate (4). When opening the door, the door hook first disengages from the abutment against the closing connecting plate (3), and the closing connecting plate (3) returns to the open door state under the action of the torsion spring (30). The locking body (2) has a C-shaped structure, with a lock hook portion (22) at one end and a locking protrusion portion (23) at the other end. The lock hook portion (22) extends from the lock hole (101) to the outside of the base body (1). When the locking body (2) moves to the locking position, the lock hook portion (22) cooperates with the door hook to lock the door hook, and the locking protrusion portion (23) abuts against the locking plate (4) to prevent the locking body (2) from rotating, thereby locking the locking body (2).

2. The electric door lock according to claim 1, characterized in that: The torsion spring (30) is arranged at the bottom of the door-closing connecting plate (3). One side of the door-closing connecting plate (3) extends outward to form a first push plate (31), and the other side has a pressing block (32). The first push plate (31) extends out of the base body (1) through the through groove (102). When closing the door, the door hook abuts against the first push plate (31), pushing the door-closing connecting plate (3) to rotate, and the slider (5) moves towards the side away from the locking plate (4) under the action of the pressing block (32) until the pressing block (32) rotates above the first bracket (51) on one side of the slider (5) and abuts against the top of the first bracket (51) to lock the slider (5).

3. The electric door lock according to claim 2, characterized in that: Below the end of the pressing block (32) there is a driving inclined surface (320) for controlling the movement of the slider (5), and above the first bracket (51) there is a guiding inclined surface (510) matching with the driving inclined surface (320).

4. The electric door lock according to claim 1, characterized in that: The door hook has a groove for inserting the locking projection (23) of the locking body (2).

5. The electric door lock according to claim 1, characterized in that: On the outer side of the locking projection (23) there is a limiting projection (24), and in the base body (1) there is a limiting stepped groove (12) for preventing the locking body (2) from rotating. When the limiting projection (24) abuts against the limiting stepped groove (12), the locking body (2) rotates to the extreme position. At this time, under the insertion action of the door hook and the pulling force of the tension spring (20), the locking body (2) moves to the locked position.

6. The electric door lock according to claim 1, characterized in that: On the side of the locking plate (4) facing the slider (5) there is a locking groove (41). When the slider (5) bounces up and inserts into the locking groove (41), the locking plate (4) is locked.

7. The electric door lock according to claim 1, characterized in that: A signal switch assembly (6) is further arranged in the base body (1). On the signal switch assembly (6) there are a static contact assembly (61) and a moving contact assembly (62). When the static contact assembly (61) and the moving contact assembly (62) are in contact, a door-closing signal is sent out. When the slider (5) bounces up, under the abutting action of the second bracket (52) on one side of the slider (5), the moving contact assembly (62) disengages from the contact with the static contact assembly (61), sending out an opening signal.

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