Household appliance safety door lock

Abstract

The utility model discloses a safety door lock of a household appliance. The safety door lock comprises a door lock catch assembly and a lock body device, the lock body device comprises a door lock seat connected with an electric appliance and a lock body assembly arranged on the door lock seat, the lock body assembly further comprises a sliding lock hook arranged on the door lock seat, and a locking groove is formed in the sliding lock hook; the lock body assembly further comprises an elastic piece used for pushing the sliding lock hook to rotate. A limiting assembly is arranged on the door lock seat and used for limiting the degree of freedom, except rotation and sliding relative to the door lock seat, of the sliding lock hook. Door opening unlocking and door closing locking movement is converted into sliding and rotating movement of the sliding lock hook, operation is easy, and the service life is long; as the telescopic force of the elastic piece limits the forward rotation of the sliding latch hook, the sliding latch hook cannot rotate under high voltage generated by an electric appliance, so that the high voltage is effectively and reliably resisted; meanwhile, the electric appliance door is automatically opened or closed, the cost is low, and the overall appearance of the electric appliance is attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to a safety door lock for household appliances. Background Art

[0002] For some electrical appliances that generate high pressure in the working chamber during operation, a door lock is installed on the appliance door in order to improve protection and safety of use; for example, a steam oven, the door of the steam oven is rotatably connected to the box body through a door hinge. However, since the steam oven door itself has no pre-tightening contraction force, the strength of the door hinge cannot completely resist the high pressure of steam, causing high pressure steam leakage from the door, which lacks safety. Therefore, a door lock is installed on the steam oven door;

[0003] However, the existing electrical door lock structure is a lock that can be elastically deformed and is buckled with a fixed lock hook. This door lock structure is not only laborious to operate, but also easily causes the lock to be damaged due to exceeding the elastic deformation limit if operated improperly.

[0004] In addition, existing electrical appliances need to be additionally equipped with a door detection switch on the opening of the box to determine whether the door of the electrical appliance is closed. Such a structure not only increases the cost, but also destroys the overall appearance.

[0005] Therefore, it is necessary to develop a household appliance safety door lock that is simple and labor-saving to operate, has a long service life, and can effectively and reliably resist high pressure; at the same time, it can automatically detect whether the appliance door is opened or closed, which is not only low in cost but also beautiful in overall appearance. Utility Model Content

[0006] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0007] A household appliance safety door lock, comprising a door lock catch assembly arranged on the appliance door and a lock body device arranged on the appliance, characterized in that:

[0008] The lock body device comprises a door lock seat connected to the electrical appliance and a lock body assembly arranged on the door lock seat, the lock body assembly further comprises a sliding lock hook arranged on the door lock seat, and a locking groove is provided on the sliding lock hook;

[0009] The lock body assembly also includes an elastic member for pushing the sliding lock hook to rotate;

[0010] A limit assembly is provided on the door lock seat, and the limit assembly is used to limit the freedom of the sliding lock hook except rotation and sliding relative to the door lock seat;

[0011] When the door is closed and locked, the door lock catch assembly moves toward the direction close to the lock body assembly, and the door lock catch assembly pushes the sliding lock hook to slide forward and rotate forward under the action of the limit assembly. The door lock catch assembly is buckled into the locking groove, and then continues to push the sliding lock hook to slide forward and rotate in the opposite direction to a horizontal state to maintain the locked state, and the elastic member undergoes elastic deformation to generate elastic force;

[0012] When the door is opened and unlocked, the door lock assembly moves away from the lock body assembly, the sliding lock hook slides in the opposite direction to the initial position under the action of the limiting assembly and then rotates forward, the door lock assembly disengages from the locking groove, the elastic member releases the elastic force during the reverse sliding process, and elastically deforms during the forward rotation to generate elastic force, but the elastic member releases the elastic force to push the sliding lock hook to rotate in the opposite direction to a horizontal state and then remains in the unlocked state.

[0013] Preferably, one end of the elastic member is connected to the door lock seat, and the other end is connected to the upper side of the sliding lock hook; the sliding lock hook is connected to the door lock seat via a limiting assembly.

[0014] Preferably, the limiting assembly includes a first roller pin, the sliding lock hook is provided with a closed slide groove, and the first roller pin passes through the closed slide groove and is connected to the door lock seat;

[0015] The closed sliding groove can slide left and right relative to the first roller pin, and the sliding locking hook can rotate around the axis of the first roller pin.

[0016] Preferably, the limiting assembly further comprises a second roller pin, and the sliding lock hook is further provided with a semi-open slide groove, and the second roller pin passes through the semi-open slide groove and is connected to the door lock seat;

[0017] The semi-open sliding groove is located on a side of the closed sliding groove away from the locking groove, and can slide left and right relative to the second roller pin.

[0018] Preferably, the closed chute is a closed waist-shaped hole, and the semi-open chute is a semi-open waist-shaped hole.

[0019] Preferably, a lock opening is provided on the door lock seat, the locking groove of the sliding lock hook faces the lock opening, and a guide component is provided between the lock opening and the sliding lock hook, and the guide component is used to guide the door lock buckle component and prevent the door lock buckle component from scratching the lock opening.

[0020] Preferably, the guide assembly includes roller rods arranged front and rear relative to each other on the inner side of the lock port, and the roller rods are rotatably connected to the door lock seat.

[0021] Preferably, the lock body device further comprises a micro switch arranged on the door lock seat, and a driving part is arranged at one end of the sliding lock hook away from the locking groove;

[0022] When the door is closed and locked, the driving part presses the micro switch;

[0023] When the door is opened and unlocked, the driving unit is disengaged from the micro switch.

[0024] Preferably, the elastic member comprises a spring, and the spring is a tension spring or a compression spring.

[0025] Preferably, the door lock assembly includes an extension portion, and a mounting portion and a lock respectively disposed at two ends of the extension portion;

[0026] The extension portion is inclined upward toward a direction approaching the lock buckle.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. The utility model provides a limit assembly on the door lock seat, and provides a sliding lock hook and an elastic member in the lock body assembly, so that the door opening and unlocking and door closing and locking movements of the door structure are converted into sliding and rotating movements of the sliding lock hook, which is simple to operate and has a long service life.

[0029] 2. The elastic force of the elastic part limits the positive rotation of the sliding lock hook, so that the sliding lock hook cannot rotate under the high pressure generated by the appliance, thereby effectively and reliably resisting the high pressure; because the pulling force of the user manually opening the appliance door is much greater than the pressure when the high pressure is rushed, it ensures that the door is opened conveniently without causing high pressure leakage, which is safe, reliable and easy to operate.

[0030] 3. There is no need to install an additional door detection switch on the appliance port to determine whether the appliance door is closed. The opening or closing of the appliance door is automatically detected by the micro switch through the sliding lock hook, which is not only low-cost but also beautiful in overall appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the utility model in the door opening and unlocking state;

[0032] Figure 2 It is a three-dimensional structural schematic diagram of the utility model in a closed and locked state;

[0033] Figure 3 for Figure 2 A schematic diagram of the structure in which the middle door lock catch assembly pulls the sliding lock hook to slide in the opposite direction;

[0034] Figure 4 for Figure 3 A schematic diagram of the structure in which the middle sliding lock hook rotates forward until the door lock catch assembly is disengaged;

[0035] Among them: door lock buckle assembly 1, lock body device 2, door lock seat 3, lock body assembly 4, limit assembly 5, guide assembly 6, micro switch 7, mounting part 11, extension part 12, lock buckle 13, lock mouth 31, sliding lock hook 41, elastic member 42, first roller pin 51, second roller pin 52, roller rod 61, locking groove 411, closed slide groove 412, semi-open slide groove 413, driving part 414. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0040] like Figure 1-4 As shown, the household appliance safety door lock comprises a door lock assembly 1 arranged on the appliance door (not shown in the figure) and a lock body device 2 arranged on the appliance (not shown in the figure), characterized in that:

[0041] The lock body device 2 includes a door lock seat 3 connected to the electrical appliance and a lock body assembly 4 arranged on the door lock seat 3. The lock body assembly 4 also includes a sliding lock hook 41 arranged on the door lock seat 3. The sliding lock hook 41 is provided with a locking groove 411.

[0042] The lock body assembly 4 further includes an elastic member 42 for pushing the sliding lock hook 41 to rotate;

[0043] The door lock seat 3 is provided with a limit assembly 5, and the limit assembly 5 is used to limit the freedom of the sliding lock hook 41 except rotation and sliding relative to the door lock seat 3;

[0044] When the door is closed and locked, Figure 1 , 2 As shown, the door lock catch assembly 1 moves toward the direction close to the lock body assembly 4, and the door lock catch assembly 1 pushes the sliding lock hook 41 to slide forward and rotate forward under the action of the limiting assembly 5, and the door lock catch assembly 1 is buckled into the locking groove 411, and then continues to push the sliding lock hook 41 to slide forward and rotate in the opposite direction to a horizontal state to maintain the locked state, and the elastic member 42 undergoes elastic deformation to generate elastic force;

[0045] When the door is unlocked, Figure 3 , 4 As shown, the door lock assembly 1 moves away from the lock body assembly 4, and the sliding lock hook 41 slides in the opposite direction to the initial position under the action of the limit assembly 5 and then rotates forward. The door lock assembly 1 disengages from the locking groove 411, and the elastic member 42 releases the elastic force during the reverse sliding process and undergoes elastic deformation to generate elastic force during the forward rotation. However, the elastic member 42 releases the elastic force to push the sliding lock hook 41 to rotate in the opposite direction to a horizontal position and then remains in an unlocked state.

[0046] In this embodiment, by setting a limit assembly 5 on the door lock seat 3, and setting a sliding lock hook 41 and an elastic member 42 in the lock body assembly 4, the door opening and unlocking and door closing and locking movements of the door structure are converted into sliding and rotating movements of the sliding lock hook 41, which is simple to operate and has a long service life.

[0047] In this embodiment, when the door is closed and locked, the elastic force of the elastic member 42 limits the positive rotation of the sliding lock hook 41, so that the sliding lock hook 41 cannot rotate under the high pressure generated by the appliance, thereby effectively and reliably resisting the high pressure; because the pulling force of the user manually opening the appliance door is much greater than the pressure when the high pressure is flushed, it ensures that the door is opened conveniently without causing high pressure leakage, which is safe, reliable and easy to operate.

[0048] Further, such as Figure 1-4 As shown, one end of the elastic member 42 is connected to the door lock seat 3, and the other end is connected to the upper side of the sliding lock hook 41; the sliding lock hook 41 is connected to the door lock seat 3 through the limiting assembly 5.

[0049] In this embodiment, compared with the prior art, the above structure does not need to lock and limit the sliding lock hook 41 through an additional limiting member, but limits the positive rotation of the sliding lock hook 41 through the telescopic force of the elastic member 42. The structure is simpler, the cost is low, and the operation is convenient and safe.

[0050] Further, such as Figure 1-4As shown, the limiting assembly 5 includes a first roller pin 51, and a closed slide groove 412 is provided on the sliding lock hook 41. The first roller pin 51 passes through the closed slide groove 412 and is connected to the door lock seat 3;

[0051] The closed sliding groove 412 can slide left and right relative to the first roller pin 51 , and the sliding locking hook 41 can rotate around the axis of the first roller pin 51 .

[0052] In this embodiment, the closed slide groove 412 is provided to limit the sliding lock hook 41 to slide and rotate relative to the door lock seat 3 within a set position range.

[0053] Further, such as Figure 1-4 As shown, the limiting assembly 5 further includes a second roller pin 52, and a semi-open slide groove 413 is further provided on the sliding lock hook 41, and the second roller pin 52 passes through the semi-open slide groove 413 and is connected to the door lock seat 3;

[0054] The semi-open sliding groove 413 is located at a side of the closed sliding groove 412 away from the locking groove 411 and can slide left and right relative to the second roller pin 52 .

[0055] In this embodiment, in order to improve the sliding stability of the sliding lock hook 41 and limit the reverse rotation range of the sliding lock hook 41, a structure in which the first roller pin 51 cooperates with the closed slide groove 412 and the second roller pin 52 cooperates with the open slide groove is adopted to form a two-point straight line to ensure the sliding stability of the sliding lock hook 41.

[0056] In this embodiment, the semi-open slide groove 413 structure allows the sliding lock hook 41 to slide smoothly and rotate at the same time, thereby ensuring that the sliding lock hook 41 can rotate in the forward direction when the door is opened and unlocked; and preventing the door lock assembly 1 from entering the locking groove 411 during the door closing and locking process. The continued pushing force causes the sliding lock hook 41 to rotate in the reverse direction too much, causing it to shake and produce abnormal noise.

[0057] Further, such as Figure 1-4 As shown, the closed slide groove 412 is a closed waist-shaped hole, and the semi-open slide groove 413 is a semi-open waist-shaped hole.

[0058] In this embodiment, the above structure satisfies the sliding of the sliding lock hook 41 while ensuring the stability and reliability of the rotation around the roller pin.

[0059] Further, such as Figure 1-4 As shown, a lock opening 31 is provided on the door lock seat 3, a lock groove 411 of the sliding lock hook 41 faces the lock opening 31, a guide assembly 6 is provided between the lock opening 31 and the sliding lock hook 41, and the guide assembly 6 is used to guide the door lock catch assembly 1 and prevent the door lock catch assembly 1 from scratching the lock opening 31.

[0060] Further, such as Figure 1 As shown, the guide assembly 6 includes a roller rod 61 which is relatively arranged at the inner side of the lock hole 31 in front and back, and the roller rod 61 is rotatably connected to the door lock seat 3.

[0061] In this embodiment, the above structure prevents the door lock assembly 1 from being offset from the middle position of the lock port 31 when closing the door, and can guide the door lock assembly 1 from the lock port 31 to the locking groove 411 position, thereby ensuring the smoothness and reliability of door closing; at the same time, it reduces the contact friction between the door lock assembly 13 and the door lock seat 3, thereby avoiding damage to the door lock assembly 1 or the lock port 31 and extending the service life.

[0062] Further, such as Figure 1-4 As shown, the lock body device 2 further includes a micro switch 7 disposed on the door lock seat 3, and a driving portion 414 is disposed at one end of the sliding lock hook 41 away from the locking groove 411;

[0063] When the door is closed and locked, the driving part 414 presses the micro switch 7;

[0064] When the door is unlocked, the driving unit 414 is disengaged from the micro switch 7 .

[0065] In this embodiment, with the above structure, after the appliance door is fully closed, the driving portion 414 of the sliding lock hook 41 presses against the micro switch 7, and the micro switch 7 is turned on to detect that the appliance door has been closed, and the appliance can be used normally; when the appliance door is opened, the driving portion 414 of the sliding lock hook 41 disengages from the micro switch 7, and then the appliance does not receive the signal from the micro switch 7, and the appliance opens the door and stops heating. Compared with the prior art, there is no need to install an additional door detection switch on the appliance port to determine whether the appliance door is closed, and the appliance door is automatically detected whether it is opened or closed, which not only has low cost but also has a beautiful overall appearance of the appliance.

[0066] Furthermore, the elastic member 42 includes a spring, and the spring is a tension spring or a compression spring.

[0067] Further, such as Figure 1-4 As shown, the door lock assembly 1 includes an extension portion 12, and a mounting portion 11 and a lock 13 respectively disposed at two ends of the extension portion 12;

[0068] The extending portion 12 is inclined upward toward the direction approaching the lock buckle 13 .

[0069] In this embodiment, the above structure, through the provision of the extension portion 12, can ensure that when the door is closed and locked, the lock catch 13 is sufficiently deep into the locking groove 411 and effectively causes the sliding lock hook 41 to slide during the door closing and locking process.

[0070] In this embodiment, a structural design that is tilted upward toward the direction approaching the lock buckle 13 is adopted to ensure that when the lock buckle 13 pushes the sliding lock hook 41, the sliding lock hook 41 rotates forward, allowing the lock buckle 13 to quickly and reliably immerse into the locking groove 411.

[0071] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. A household appliance safety door lock, comprising a door lock assembly arranged on the appliance door and a lock body device arranged on the appliance, characterized in that: The lock body device comprises a door lock seat connected to the electrical appliance and a lock body assembly arranged on the door lock seat, the lock body assembly further comprises a sliding lock hook arranged on the door lock seat, and a locking groove is provided on the sliding lock hook; The lock body assembly also includes an elastic member for pushing the sliding lock hook to rotate; A limit assembly is provided on the door lock seat, and the limit assembly is used to limit the freedom of the sliding lock hook except rotation and sliding relative to the door lock seat; When the door is closed and locked, the door lock catch assembly moves toward the direction close to the lock body assembly, and the door lock catch assembly pushes the sliding lock hook to slide forward and rotate forward under the action of the limit assembly. The door lock catch assembly is buckled into the locking groove, and then continues to push the sliding lock hook to slide forward and rotate in the opposite direction to a horizontal state to maintain the locked state, and the elastic member undergoes elastic deformation to generate elastic force; When the door is opened and unlocked, the door lock assembly moves away from the lock body assembly, the sliding lock hook slides in the opposite direction to the initial position under the action of the limiting assembly and then rotates forward, the door lock assembly disengages from the locking groove, the elastic member releases the elastic force during the reverse sliding process, and elastically deforms during the forward rotation to generate elastic force, but the elastic member releases the elastic force to push the sliding lock hook to rotate in the opposite direction to a horizontal state and then remains in the unlocked state.

2. A household appliance safety door lock according to claim 1, characterized in that: One end of the elastic member is connected to the door lock seat, and the other end is connected to the upper side of the sliding lock hook; the sliding lock hook is connected to the door lock seat through a limiting component.

3. A household appliance safety door lock according to claim 1 or 2, characterized in that: The limiting assembly includes a first roller pin, a closed slide groove is provided on the sliding lock hook, and the first roller pin passes through the closed slide groove and is connected to the door lock seat; The closed sliding groove can slide left and right relative to the first roller pin, and the sliding locking hook can rotate around the axis of the first roller pin.

4. A household appliance safety door lock according to claim 3, characterized in that: The limiting assembly also includes a second roller pin, and the sliding lock hook is also provided with a semi-open slide slot, and the second roller pin passes through the semi-open slide slot and is connected to the door lock seat; The semi-open sliding groove is located on a side of the closed sliding groove away from the locking groove, and can slide left and right relative to the second roller pin.

5. A household appliance safety door lock according to claim 4, characterized in that: The closed chute is a closed waist-shaped hole, and the semi-open chute is a semi-open waist-shaped hole.

6. A household appliance safety door lock according to claim 1, characterized in that: A lock opening is provided on the door lock seat, a lock groove of the sliding lock hook faces the lock opening, a guide component is provided between the lock opening and the sliding lock hook, and the guide component is used to guide the door lock catch component and prevent the door lock catch component from scratching the lock opening.

7. A household appliance safety door lock according to claim 6, characterized in that: The guide assembly comprises roller rods which are arranged on the inner side of the lock mouth in a front and rear manner relative to each other, and the roller rods are rotatably connected to the door lock seat.

8. A household appliance safety door lock according to claim 1, characterized in that: The lock body device also includes a micro switch arranged on the door lock seat, and a driving part is arranged on one end of the sliding lock hook away from the locking groove; When the door is closed and locked, the driving part presses the micro switch; When the door is opened and unlocked, the driving unit is disengaged from the micro switch.

9. A household appliance safety door lock according to claim 2, characterized in that: The elastic member comprises a spring, and the spring is a tension spring or a compression spring.

10. A household appliance safety door lock according to claim 1, characterized in that: The door lock catch assembly includes an extension portion, and a mounting portion and a lock catch respectively arranged at two ends of the extension portion; The extension portion is inclined upward toward a direction approaching the lock buckle.

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