Door lock capable of realizing self-resetting function by using torsional spring

Abstract

The utility model relates to the technical field of door locks, in particular to a door lock capable of realizing a self-resetting function by using a torsional spring. The combination of the torsion spring and the cam structure is adopted as a key structure for opening and closing the door lock, and the automatic reset function is achieved. When the door is normally opened and closed, the door lock can automatically recover to the initial state, and user operation is reduced; in a fault state, the arc-shaped slotted hole of the cam can disperse external force, so that damage to parts is avoided, and durability is enhanced. Meanwhile, in a fault state, automatic resetting of the lock cylinder can be completed in a door opening and closing mode. The signal switch is integrated, the locking state can be fed back to a household electrical appliance control system, intelligent control is achieved, and the household electrical appliance operates only when the household electrical appliance is locked. According to the scheme, the intelligent level of the door lock is improved, the use safety is further enhanced, and the high requirement of modern household appliances for the door lock is met.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, and in particular to a door lock that uses a torsion spring to achieve a self-resetting function. Background Technology

[0002] Door locks on household appliances, such as dishwashers and washing machines, are among the most important safety devices. Their primary function is to ensure the door is locked, keeping the appliance sealed while it is running, preventing accidental opening, and avoiding leaks of hot water or cleaning agents. Furthermore, to meet the demands of smart and safe use, door locks also need to have some degree of on / off functionality. Appliances can only operate when the door lock is in the locked state.

[0003] Because home appliances require frequent opening and closing of doors, door locks also need to frequently switch between locked and unlocked states. Various unexpected situations may occur during this process. For example, the door may be open, but the lock's internal structure may be locked. Forcing the door to close in this situation can damage the lock's structure.

[0004] Therefore, a robust and durable door lock with a self-resetting function is urgently needed for development. Utility Model Content

[0005] The purpose of this utility model is to provide a door lock that uses a torsion spring to achieve a self-resetting function. Through optimized design, the durability of the door lock is improved, and it can automatically reset even when in an abnormal state. To achieve the above objective, this utility model provides the following technical solution:

[0006] A door lock that uses a torsion spring to achieve a self-resetting function includes a door hook and a door lock;

[0007] The door hook is provided with a card interface, and the door lock includes a housing, a pin, a rotating arm, a cam, a torsion spring, and a signal switch;

[0008] The housing is provided with a door hook insertion port, the pin is located on one side of the door hook insertion port, the rotating arm passes through the pin, the rotating arm is provided with a cam placement groove, and one end of the rotating arm is provided with a toggle lever;

[0009] The cam has an arc-shaped slot and passes through the arc-shaped slot onto the pin shaft, and is located in the cam placement slot. The top of the cam has a snap-fit ​​groove for engagement with a door hook.

[0010] The housing is provided with a torsion spring placement slot and a signal switch placement slot. The torsion spring is placed in the torsion spring placement slot, with one end defined in the torsion spring placement slot and the other end connected to the cam. The signal switch is placed in the signal switch placement slot.

[0011] As an improvement, a switch button is provided on one side of the signal switch, and an opening for exposing the switch is provided inside the signal switch holder.

[0012] As an improvement, the toggle lever extends to the opening, and the bottom of the toggle lever is provided with a pressure block for pressing the switch button.

[0013] As an improvement, the snap-fit ​​groove includes a hook body, a groove, and an opposite inclined surface. After the door hook is inserted into the door hook insertion port, the front end of the door hook abuts against the opposite inclined surface, causing the cam to rotate along the pin shaft and the hook body to be inserted into the snap-fit ​​interface.

[0014] As an improvement, the front side of the door hook is provided with an inclined portion for easy insertion.

[0015] As an improvement, a fixing part is provided at the middle position of the cam, and the end of the torsion spring is hinged to the cam through the fixing part.

[0016] As an improvement, the switch button is equipped with a reset spring. When the door hook leaves the door hook insertion port, the rotating arm is bounced up by the reset spring in the switch button.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model employs a combination of torsion spring and cam structure as the key structure for door lock opening and closing, featuring an automatic reset function. During normal door opening and closing, the lock automatically returns to its initial state, reducing user intervention. In case of a malfunction, the arc-shaped slot of the cam disperses external force, preventing component damage and enhancing durability. Furthermore, in case of a malfunction, the lock cylinder can also be automatically reset by opening and closing the door.

[0019] 2. This utility model integrates a signal switch, which can feed back the locked / closed status to the home appliance control system, enabling intelligent control. The appliances only operate when locked. This solution not only improves the intelligence level of the door lock but also further enhances its security, meeting the high requirements of modern home appliances for door locks. Attached Figure Description

[0020] Figure 1 This is a structural diagram of a door hook in a door lock that uses a torsion spring to achieve a self-resetting function, as shown in Example 1.

[0021] Figure 2 This is a structural diagram of a door lock in Example 1 that uses a torsion spring to achieve a self-resetting function.

[0022] Figure 3 This is a structural diagram of the housing of a door lock that uses a torsion spring to achieve a self-resetting function, as shown in Example 1.

[0023] Figure 4This is a structural diagram of the rotating arm in a door lock that uses a torsion spring to achieve a self-resetting function, as shown in Example 1.

[0024] Figure 5 This is a structural diagram of the cam in a door lock that uses a torsion spring to achieve a self-resetting function, as shown in Example 1.

[0025] Figure 6 This is a diagram showing the state of a door lock with a torsion spring that achieves a self-resetting function in Example 1, when the door hook is just inserted into the door lock.

[0026] Figure 7 This is a diagram showing the state of a door lock with a torsion spring that enables a self-resetting function, as described in Example 1, when the door hook is fully inserted into the lock.

[0027] Figure 8 This is a diagram showing the state of the rotating arm and the switch button after the door hook is inserted into the door lock in Example 1, which uses a torsion spring to achieve a self-resetting function.

[0028] Figure 9 This is a diagram showing the internal state of a door lock in a fault state when using a torsion spring to achieve a self-resetting function, as described in Example 1.

[0029] Figure 10 This is a diagram showing the internal state of a door lock with a self-resetting function using a torsion spring in Example 1, after inserting the door hook during a fault state.

[0030] The image shows:

[0031] 1-Door hook, 11-Card interface, 12-Inclined part, 2-Door lock, 21-Housing, 211-Door hook insertion port, 212-Torsion spring placement slot, 213-Signal switch placement slot, 2131-Opening, 22-Pin shaft, 23-Rotating arm, 231-Cam placement slot, 232-Toggle lever, 2321-Pressure block, 24-Cam, 241-Arc-shaped slot, 242-Card slot, 2421-Hook body, 2422-Groove, 2423-Opposite inclined surface, 243-Fixing part, 25-Torsion spring, 26-Signal switch, 261-Switch button. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Example 1

[0034] This embodiment discloses a door lock that uses a torsion spring to achieve a self-resetting function, including a door hook 1 and a door lock 2.

[0035] The door hook 1 is provided with a card interface 11, and the front side of the door hook 1 is provided with an inclined part 12 for easy insertion.

[0036] The door lock 2 includes a housing 21, a pin 22, a rotating arm 23, a cam 24, a torsion spring 25, and a signal switch 26.

[0037] The housing 21 is provided with a door hook insertion port 211, the pin 22 is located on one side of the door hook insertion port 211, the rotating arm 23 is passed through the pin 22, the rotating arm 23 is provided with a cam placement groove 231, and one end of the rotating arm 23 is provided with a toggle lever 232.

[0038] The cam 24 has an arc-shaped slot 241, which passes through the pin 22 and is located in the cam placement slot 231. The top of the cam 24 has a snap-fit ​​slot 242 for the door hook 1.

[0039] The card slot 242 includes a hook body 2421, a groove 2422 and an opposite inclined surface 2423. After the door hook 1 is inserted into the door hook insertion port 211, the front end of the door hook 1 presses against the opposite inclined surface 2423, causing the cam 24 to rotate along the pin 22 and causing the hook body 2421 to be inserted into the card interface 11.

[0040] The housing 21 is provided with a torsion spring placement slot 212 and a signal switch placement slot 213. The torsion spring 25 is located in the torsion spring placement slot 212, with one end fixed to the torsion spring placement slot 212 and the other end connected to the cam 24. The signal switch 26 is located in the signal switch placement slot 213. A switch button 261 is provided on one side of the signal switch 26, and an opening 2131 for exposing the switch is provided in the signal switch placement slot 213.

[0041] The toggle lever 232 extends to the opening 2131, and the bottom of the toggle lever 232 is provided with a pressure block 2321 for pressing the switch button 261. The switch button 261 is provided with a return spring. When the door hook 1 leaves the door hook insertion port 211, the rotating arm 23 is lifted up by the return spring in the switch button 261.

[0042] A fixing part 243 is provided in the middle of the cam 24, and the end of the torsion spring 25 is hinged to the cam 24 through the fixing part 243.

[0043] The working principle of this solution is as follows:

[0044] 1. Opening and closing the door under normal conditions

[0045] like Figure 6As shown, before the door hook 1 is inserted, the cam 24 is tilted under the action of the torsion spring 25, and the hook body 2421 is below the door hook insertion port 211. After the door hook 1 is inserted, the front part of the door hook 1 abuts against the opposite tilted surface 2423 and pushes the cam 24 to rotate around the pin 22. At this time, the cam compresses the torsion spring 25. When the cam 24 rotates to a certain extent, the torsion spring 25 springs up and continues to push the cam 24 to rotate, so that the hook body 2421 is inserted into the locking interface 11 and locked. Figure 7 As shown. At the same time, the cam 24, supported by the torsion spring 25, can lock the cam 24 and the door hook 1, and the door lock will only be opened when subjected to a large external force, such as when a person manually pulls it open.

[0046] like Figure 8 As shown, when the door is locked, the cam 24 rotates, simultaneously driving the rotating arm 23 to rotate. At this time, the toggle lever 232 rotates downwards and presses the switch button 261, thereby activating the signal switch 26. The switch button 261 has a built-in return spring. When the door is opened, the rotating arm 23 is no longer pressed by the cam 24, and the toggle lever 232 and the switch button 261 spring back up under the action of the return spring.

[0047] 2. Opening and closing the door in case of malfunction

[0048] like Figure 9 As shown, in the event of a malfunction, such as improper human operation, cam 24 is in the closed position, but the door is actually open. Forcing the door open in this situation would damage the lock structure of a traditional lock.

[0049] In this solution, such as Figure 10 As shown, the cam 24 has an arc-shaped slot 241. When the door hook 1 is inserted, the cam 24 is subjected to force and can move downwards by relying on the arc-shaped slot 241, thereby avoiding direct external force acting on the pin 22 and preventing damage to the pin. The working principle when opening the door is the same as the principle of opening the door under normal conditions.

[0050] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A door lock that uses a torsion spring to achieve a self-resetting function, characterized in that, Including door hooks and door locks; The door hook is provided with a card interface, and the door lock includes a housing, a pin, a rotating arm, a cam, a torsion spring, and a signal switch; The housing is provided with a door hook insertion port, the pin is located on one side of the door hook insertion port, the rotating arm passes through the pin, the rotating arm is provided with a cam placement groove, and one end of the rotating arm is provided with a toggle lever; The cam has an arc-shaped slot and passes through the arc-shaped slot onto the pin shaft, and is located in the cam placement slot. The top of the cam has a snap-fit ​​groove for engagement with a door hook. The housing is provided with a torsion spring placement slot and a signal switch placement slot. The torsion spring is placed in the torsion spring placement slot, with one end fixed to the torsion spring placement slot and the other end connected to the cam. The signal switch is placed in the signal switch placement slot.

2. A door lock using a torsion spring to achieve a self-resetting function according to claim 1, characterized in that, The signal switch has a switch button on one side, and the signal switch holder has an opening for exposing the switch.

3. A door lock using a torsion spring to achieve a self-resetting function according to claim 2, characterized in that, The toggle lever extends to the opening, and a pressure block for pressing the switch button is provided at the bottom of the toggle lever.

4. A door lock using a torsion spring to achieve a self-resetting function according to claim 1, characterized in that, The snap-fit ​​groove includes a hook body, a groove, and an opposite inclined surface. After the door hook is inserted into the door hook insertion port, the front end of the door hook abuts against the opposite inclined surface, causing the cam to rotate along the pin shaft and the hook body to be inserted into the snap-fit ​​interface.

5. A door lock using a torsion spring to achieve a self-resetting function according to claim 4, characterized in that, The front side of the door hook is provided with an inclined part to facilitate insertion.

6. A door lock using a torsion spring to achieve a self-resetting function according to claim 4, characterized in that, A fixing part is provided at the middle position of the cam, and the end of the torsion spring is hinged to the cam through the fixing part.

7. A door lock using a torsion spring to achieve a self-resetting function according to claim 3, characterized in that, The switch button is equipped with a reset spring. When the door hook leaves the door hook insertion port, the rotating arm is lifted up by the reset spring inside the switch button.

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