Electric appliance door lock

Abstract

The utility model discloses an electric appliance door lock which comprises a base body with a lock hole, a locking body rotatably connected in the base body, a locking mechanism linked with the locking body, and an operating mechanism provided with a positioning pin, the positioning needle can slide along a heart-shaped lock groove of the locking mechanism to be locked or unlocked under the action of the locking body, the locking mechanism and the operating mechanism, the locking body can push the positioning needle to be separated from the heart-shaped lock groove when a door is forcibly opened, and the locking body and the positioning needle can be reset under the action of a forcibly opened door spring. And a gap is formed between the locking body and the positioning needle. The forced door opening spring can be used for absorbing door jacking force generated when clothes are stirred so as to prevent the door lock from being easily and accidentally jacked open by the clothes, and forced door opening can be achieved when the forced door opening tension exceeds the limit, so that the forced door opening device is safer, more reliable and more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to the technical field of electric door locks. Background Art

[0002] In the household appliance market such as clothes dryers, the handleless door cover design makes it impossible for users to open the door by manually pulling the door. In addition, due to safety requirements, the door cover must be able to open when the inward thrust reaches 70N. However, the load capacity of existing clothes dryers is getting larger and larger. Once there are too many clothes loaded, it is easy for the clothes to hit the door cover for a certain distance from time to time during agitation and drying. At present, common door locks on the market are prone to have the door cover being pushed open by clothes because there is no gap between the locking body and the positioning pin, thus affecting the normal drying process, which needs to be solved urgently. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems in the prior art, and propose an electric door lock, which can not only use a strong-opening spring to absorb the door-top force generated during the agitation of clothes to prevent the door lock from being easily pushed open by clothes accidentally, but also can achieve strong opening when the strong-opening pulling force exceeds the limit, thereby making the use safer, more reliable and more convenient.

[0004] To achieve the above purpose, the utility model proposes an electric door lock, which includes a base body with a lock hole, a locking body rotatably connected in the base body, a locking mechanism linked with the locking body, and an operating mechanism equipped with a positioning pin. The positioning pin can slide along the heart-shaped lock groove of the locking mechanism to lock or unlock under the action of the locking body, the locking mechanism and the operating mechanism. The locking body can push the positioning pin out of the heart-shaped lock groove during strong opening. The locking body and the positioning pin can also be reset under the action of a strong-opening spring respectively, and there is a gap between the locking body and the positioning pin.

[0005] Preferably, the locking mechanism includes a locking plate and a locking spring, the operating mechanism includes an operating plate and an operating spring. The locking plate and the operating plate are indirectly connected to the base body through the locking spring and the operating spring respectively, and a torsion spring is installed on the positioning pin.

[0006] Preferably, a strip-shaped sliding groove parallel to the telescopic direction of the strong-opening spring is arranged in the base body, a locking shaft is slidably connected to the strip-shaped sliding groove, and the locking shaft penetrates through the locking body and is tightened by the strong-opening spring.

[0007] Preferably, the locking body indirectly pushes the positioning pin out of the heart-shaped lock groove through a spring seat during strong opening. The spring seat is sleeved outside the strong-opening spring and has a convex corner part, and the convex corner part is arranged opposite to the positioning pin.

[0008] Preferably, a core column and a core block with a strip-shaped blind groove are respectively arranged on the operation board. One end of the torsion spring is coiled outside the core column, and the other end is fixed to the middle of the positioning pin. One end of the positioning pin passes through the strip-shaped blind groove and is located on the side of the convex corner away from the locking body, and the other end is inserted into the heart-shaped lock groove.

[0009] Preferably, a notch is further arranged on the spring seat, and the notch is penetrated by the locking shaft.

[0010] Preferably, a strip-shaped guide groove parallel to the telescopic direction of the forced opening spring is arranged in the locking plate. The locking body has a lock mouth that can be engaged with the door hook inserted into the base body along the lock hole and a slider slidably connected in the strip-shaped guide groove.

[0011] Preferably, both ends of the locking spring are fixed to the base body and the locking plate respectively, both ends of the operation spring are fixed to the base body and the operation board respectively, the telescopic directions of the locking spring and the operation spring are perpendicular to each other. The locking body can push the locking plate along the direction parallel to the telescopic direction of the locking spring during the insertion of the door hook. The positioning pin locks when it slides to the concave part of the heart-shaped lock groove, and the positioning pin unlocks when it slides to the tip tail of the heart-shaped lock groove (i.e., Figure 7 point a).

[0012] Preferably, a first insertion post inserted into the locking spring and an operation spring, a third insertion post inserted into the locking spring are arranged on the locking plate, and a fourth insertion post inserted into the operation spring is arranged on the operation board.

[0013] Preferably, an electromagnetic mechanism capable of electrically driving the positioning pin to slide along the heart-shaped lock groove and unlock is further installed in the base body. A socket is arranged on the operation board, and the electromagnetic mechanism is plugged into the socket through a plug.

[0014] Advantages of the utility model:

[0015] 1) By jointly using the base body, the locking body, the locking plate, the operation board and the positioning pin to form the main body of the door lock, the utility model can use the locking body, the locking spring and the operation spring to make the positioning pin slide along the heart-shaped lock groove of the locking plate to complete the manual pressing locking operation or the manual pressing unlocking operation when the user closes the door manually or presses the door cover after closing the door. On this basis, a forced opening spring and a spring seat are added between the base body and the locking body, and a torsion spring is added between the operation board and the positioning pin. It can not only use the forced opening spring to absorb the door top force generated during the agitation of clothes to prevent the door lock from being accidentally opened by clothes, but also realize forced opening when the forced opening pulling force exceeds the limit, thus making the use safer, more reliable and more convenient;

[0016] 2) By separately adding a core column and a core block with strip-shaped blind slots above the operation panel in the present utility model, and at the same time adding an extended convex corner portion on the spring seat sleeved outside the forced-opening spring, one end of the positioning pin can pass through the strip-shaped blind slot and be arranged opposite to the convex corner portion, while the other end is inserted into the heart-shaped lock groove. Moreover, the torsion spring wound around the core column is fixed to the positioning pin, so that the positioning pin can move along with the spring seat in the telescopic direction of the forced-opening spring and be reset by the torsion spring. This can not only ensure the smooth progress of forced opening, but also simplify the design, facilitate processing, and reduce the manufacturing cost;

[0017] 3) By arranging a strip-shaped sliding groove parallel to the telescopic direction of the forced-opening spring in the base body in the present utility model, and adding a notch on the spring seat, the linkage smoothness among the locking shaft, the forced-opening spring and the spring seat can be ensured.

[0018] The features and advantages of the present utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Brief Description of the Drawings

[0019] Figure 1 is a schematic perspective view of the electric door lock of the present utility model when the cover plate of the base is removed;

[0020] Figure 2 is Figure 1 an enlarged schematic view of part A of

[0021] Figure 3 is Figure 1 an exploded schematic view when the electromagnetic mechanism is removed;

[0022] Figure 4 is an assembly schematic view of the locking plate, operation panel, positioning pin and torsion spring of the electric door lock of the present utility model

[0023] Figure 5 is a schematic view of the state of the positioning pin of the electric door lock of the present utility model when it just leaves the locking plate;

[0024] Figure 6 is a schematic perspective view of the locking body of the electric door lock of the present utility model;

[0025] Figure 7 is a schematic perspective view of the locking plate of the electric door lock of the present utility model;

[0026] Figure 8 is a schematic perspective view of the operation panel of the electric door lock of the present utility model;

[0027] Figure 9 is a schematic perspective view of the spring seat of the electric door lock of the present utility model.

[0028] In the figure: 1-base, 2-locking body, 20-locking shaft, 21-locking port, 22-slider, 3-locking plate, 30-locking spring, 31-heart-shaped lock groove, 32-strip guide groove, 4-operating plate, 40-operating spring, 41-core column, 42-core block, 43-fourth plug column 44-socket, 5-positioning pin, 50-torsion spring, 6-forced door opening spring, 7-spring seat, 71-convex corner, 72-notch, 8-electromagnetic mechanism. DETAILED DESCRIPTION

[0029] See also Figures 1 to 9 The utility model electric door lock comprises a base 1 with a lock hole, a locking body 2 rotatably connected in the base 1, a locking mechanism linked with the locking body 2, and an operating mechanism equipped with a positioning pin 5. The positioning pin 5 can slide along the heart-shaped lock groove 31 of the locking mechanism to lock or unlock under the action of the locking body 2, the locking mechanism and the operating mechanism. The locking body 2 can push the positioning pin 5 out of the heart-shaped lock groove 31 when the door is forced to open. The locking body 2 and the positioning pin 5 can also be reset respectively under the action of the forced door opening spring 6. There is a gap between the locking body 2 and the positioning pin 5.

[0030] The locking mechanism includes a locking plate 3 and a locking spring 30 , and the operating mechanism includes an operating plate 4 and an operating spring 40 . The locking plate 3 and the operating plate 4 are indirectly connected to the base 1 through the locking spring 30 and the operating spring 40 respectively. A torsion spring 50 is installed on the positioning pin 5 .

[0031] The base body 1 is provided with a strip-shaped slide groove parallel to the expansion and contraction direction of the forced door-opening spring 6 , and a locking shaft 20 is slidably connected to the strip-shaped slide groove. The locking shaft 20 passes through the locking body 2 and is tightened by the forced door-opening spring 6 .

[0032] When the door is forced to be opened, the locking body 2 indirectly pushes the positioning pin 5 out of the heart-shaped lock groove 31 through the spring seat 7. The spring seat 7 is sleeved outside the forced door opening spring 6 and has a convex corner portion 71, and the convex corner portion 71 is arranged directly opposite to the positioning pin 5.

[0033] The operating panel 4 is provided with a core column 41 and a core block 42 with a strip-shaped blind groove. One end of the torsion spring 50 is coiled outside the core column 41 and the other end is fixed to the middle of the positioning pin 5. One end of the positioning pin 5 passes through the strip-shaped blind groove and is located on the side of the convex corner portion 71 facing away from the locking body 2, and the other end is inserted into the heart-shaped lock groove 31.

[0034] A notch 72 is further provided on the spring seat 7 , and the notch 72 is penetrated by the locking shaft 20 .

[0035] The locking plate 3 is internally provided with a strip-shaped guide groove 32 parallel to the telescopic direction of the strong door-opening spring 6. The locking body 2 has a locking opening 21 that can engage with a door hook inserted into the base body 1 along the lock hole and a slider 22 slidably connected in the strip-shaped guide groove 32.

[0036] Both ends of the locking spring 30 are fixed to the base body 1 and the locking plate 3 respectively. Both ends of the operating spring 40 are fixed to the base body 1 and the operating plate 4 respectively. The telescopic directions of the locking spring 30 and the operating spring 40 are perpendicular to each other. The locking body 2 can push the locking plate 3 along a direction parallel to the telescopic direction of the locking spring 30 during the insertion of the door hook. The positioning pin 5 is locked when it slides to the concave part of the heart-shaped lock groove 31, and the positioning pin 5 is unlocked when it slides to the tip tail of the heart-shaped lock groove 31 (i.e., Figure 7 point a).

[0037] The base body 1 is respectively provided with a first insertion post inserted into the locking spring 30 and an operating spring 40. The locking plate 3 is provided with a third insertion post inserted into the locking spring 30. The operating plate 4 is provided with a fourth insertion post 43 inserted into the operating spring 40.

[0038] An electromagnetic mechanism 8 that can electrically drive the positioning pin 5 to slide along the heart-shaped lock groove 31 and unlock is also installed in the base body 1. The operating plate 4 is provided with a socket 44, and the electromagnetic mechanism 8 is plugged into the socket 44 through a plug.

[0039] The working process of the present utility model:

[0040] ① Door-opening state:

[0041] In the door-opening state, the positioning pin 5 is located at the tip tail of the heart-shaped lock groove 31 (i.e., Figure 7 point a) and does not limit the locking plate 3. At this time, the locking plate 3 is at the leftmost position under the action of the locking spring 30 (refer to Figures 1 to 3 ).

[0042] ② Manual door-closing action:

[0043] During the process of the door hook extending into the base body 1 along the lock hole (i.e., when the user manually closes the door cover), the door hook will first engage with the locking body 2 at the locking opening 21 and then push the locking body 2 to rotate forward. At this time, the locking body 2 can drive the locking plate 3 to move to the right through the slider 22 (as shown in Figure 7 , the positioning pin 5 will move relatively to transfer from point a to point d).

[0044] Refer to Figure 7When the user releases their hand, the locking plate 3 will move back to the left under the action of the locking spring 30. At the same time, the positioning pin 5 will also move upward under the action of the operating plate spring 40, and finally the positioning pin 5 will move relatively from point d to point c (i.e., the concave part of the heart-shaped locking groove 31). At this time, the locking plate 3 is locked by the positioning pin 5, and the locking body 2 is locked by the locking plate 3, finally realizing the locking of the door lock.

[0045] ③ Manual pressing to open the door:

[0046] When the door lock is in the locked state, if the user presses the door cover again (i.e., the door hook moves inward in the base body 1), the locking body 2 will rotate forward and cause the locking plate 3 to move to the right (as Figure 7 shown, the positioning pin 5 will move relatively to transfer from point c to point b).

[0047] Refer to Figure 7 When the user releases their hand, under the action of the locking spring 30 and the operating plate spring 40, the positioning pin 5 will first move relatively from point b to point e, and then from point e to point a, finally completing the pressing to open the door of the door lock.

[0048] ④ Electrically normal opening of the door:

[0049] When the door lock is in the locked state, the electromagnetic mechanism 8 can also be used to directly drive the operating plate 4 to move so that the positioning pin 5 no longer abuts against the heart-shaped locking groove 31 at the concave part, and then the positioning pin 5 is pulled back to the tip end of the heart-shaped locking groove 31 (i.e., Figure 7 point a) through the locking spring 30 and the operating spring 40 in the same way as above.

[0050] ⑥ Manual forced opening of the door:

[0051] Refer to Figures 1 to 3 When the door is in the locked state, since the locking plate 3 is locked by the positioning pin 5, the position of the strip-shaped guide groove 32 remains unchanged, and the slider 22 can only move up and down along the strip-shaped guide groove 32. That is to say, during the process of the user forcibly pulling the door cover outward to open the door forcibly in the locked state (i.e., the process of the door hook leaving the base body 1 along the lock hole), on the one hand, the locking body 2 keeps the angle unchanged, and on the other hand, it drives the spring seat 7 to move upward through the locking shaft 20 against the elastic force of the forced opening spring 6. Once the user's pulling force exceeds the limit, the spring seat 7 can push the positioning pin 5 out of the heart-shaped locking groove 31, so that the positioning pin 5 moves to the unlocking position under the cooperation of the locking spring 30 and the operating spring 40, finally completing the forced opening action. In addition, if the user releases their hand in advance before unlocking, the locking body 2 and the positioning pin 5 will reset under the action of the forced opening spring 6 and the torsion spring 50 respectively. The process of clothes propping against the door is the same as above.

[0052] The above embodiments are illustrative of the present invention and not restrictive thereof. Any solution obtained by simply changing the present invention belongs to the protection scope of the present invention.

Claims

1. An electrical door lock, comprising a base (1) having a lock hole, a locking body (2) rotatably connected to the base (1), a locking mechanism linked to the locking body (2), and an operating mechanism equipped with a positioning pin (5), wherein the positioning pin (5) can slide along a heart-shaped lock groove (31) of the locking mechanism to lock or unlock under the action of the locking body (2), the locking mechanism and the operating mechanism, and characterized in that: The locking body (2) can push the positioning pin (5) out of the heart-shaped lock groove (31) when the door is forced to be opened. The locking body (2) and the positioning pin (5) can also be reset respectively under the action of the forced door opening spring (6). A gap exists between the locking body (2) and the positioning pin (5).

2. The electric door lock according to claim 1, characterized in that: The locking mechanism comprises a locking plate (3) and a locking spring (30), and the operating mechanism comprises an operating plate (4) and an operating spring (40). The locking plate (3) and the operating plate (4) are indirectly connected to the base (1) via the locking spring (30) and the operating spring (40) respectively, and a torsion spring (50) is installed on the positioning pin (5).

3. The electric door lock according to claim 2, characterized in that: The base body (1) is provided with a strip-shaped slide groove parallel to the expansion and contraction direction of the forced door-opening spring (6), and a locking shaft (20) is slidably connected to the strip-shaped slide groove. The locking shaft (20) passes through the locking body (2) and is tightened by the forced door-opening spring (6).

4. The electric door lock according to claim 3, characterized in that: When the door is forced to open, the locking body (2) indirectly pushes the positioning pin (5) out of the heart-shaped lock groove (31) via the spring seat (7); the spring seat (7) is sleeved outside the forced door opening spring (6) and has a convex corner portion (71); the convex corner portion (71) is arranged directly opposite to the positioning pin (5).

5. The electric door lock according to claim 4, characterized in that: The operating panel (4) is provided with a core column (41) and a core block (42) with a strip-shaped blind groove, one end of the torsion spring (50) is coiled outside the core column (41) and the other end is fixed to the middle of the positioning pin (5), one end of the positioning pin (5) passes through the strip-shaped blind groove and is located on the side of the convex corner portion (71) facing away from the locking body (2) and the other end is inserted into the heart-shaped lock groove (31).

6. The electric door lock according to claim 4, characterized in that: A notch (72) is also provided on the spring seat (7), and the notch (72) is penetrated by the locking shaft (20).

7. The electric door lock according to claim 3, characterized in that: The locking plate (3) is provided with a strip guide groove (32) parallel to the expansion and contraction direction of the forced door opening spring (6), and the locking body (2) has a lock opening (21) that can engage with a door hook inserted into the base body (1) along the lock hole, and a sliding block (22) slidably connected to the strip guide groove (32).

8. The electrical door lock according to claim 7, characterized in that: The two ends of the locking spring (30) are respectively fixed to the base (1) and the locking plate (3); the two ends of the operating spring (40) are respectively fixed to the base (1) and the operating plate (4); the locking spring (30) and the operating spring (40) are perpendicular to each other in their expansion and contraction directions; the locking body (2) can push the locking plate (3) in a direction parallel to the expansion and contraction direction of the locking spring (30) during the insertion of the door hook; the positioning pin (5) is locked when it slides to the inner concave part of the heart-shaped lock groove (31); and the positioning pin (5) is unlocked when it slides to the tip and tail of the heart-shaped lock groove (31).

9. The electric door lock according to claim 8, characterized in that: The base (1) is provided with a first plug post and a second plug post respectively inserted into the locking spring (30) and the operating spring (40); the locking plate (3) is provided with a third plug post inserted into the locking spring (30); and the operating plate (4) is provided with a fourth plug post (43) inserted into the operating spring (40).

10. The electric door lock according to any one of claims 2 to 9, characterized in that: The base body (1) is also provided with an electromagnetic mechanism (8) which can electrically drive the positioning pin (5) to slide along the heart-shaped lock groove (31) and unlock the lock. A socket (44) is provided on the operating panel (4), and the electromagnetic mechanism (8) is plugged into the socket (44) via a plug.

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