Door lock structure with high-temperature detection self-locking function

Abstract

A door lock structure with high temperature detection self-locking function, it includes the lock catch casing, installs the catch hook in the lock catch casing, the bottom of the catch hook is hinged with the self-locking movable block, the rear side of the self-locking movable block is provided with the limit hook, the rear side edge of the lock catch casing is provided with the electromagnet and temperature detection switch, when the electromagnet is powered, can lock the self-locking movable block, and make temperature detection switch conduction;Temperature sensor is installed in the electric appliance and is connected with temperature detection switch, temperature sensor senses that the temperature inside electric appliance is higher than set value, electromagnet is always in the power-on state, until temperature is lower than set value, electromagnet is powered off and resets.The utility model can be applied to the electric appliance product on the high temperature application scene such as dish washer, steamer, etc., no matter whether electric appliance works, as long as the temperature inside electric appliance is higher than set value, the door plate of electric appliance cannot be opened, only when temperature reduces to set value, the door plate can be opened, prevent steam from hurting people, it has the advantages of simple structure, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a door lock structure of household appliance, specifically a door lock structure with high temperature detection self-locking function. BACKGROUND

[0002] To ensure the sealing property and the use safety, the door lock assembly is generally installed on the machine door to lock the machine door for the electric appliances such as dish-washing machine and steaming oven. However, many door locks do not have self-locking function, and the door plate can be forcibly opened when the external force is large, thus having safety hazard. The electric appliances have high-temperature steam in the interior when working or just after working, and the overflowed high-temperature steam is easy to hurt people once the door is opened.

[0003] The door lock structure of the steam oven disclosed by the Chinese patent office on March 12, 2024, with the patent number 202322107574.6, includes a box body, a steaming and baking cavity is arranged in the box body, a face frame is arranged at the opening of the steaming and baking cavity, and a clamping hole is arranged on the face frame; a box door is hingedly connected with the face frame through a hinge, and the box door is used to open or close the opening of the steaming and baking cavity; a door lock device is arranged on the box door, and the door lock device is used to be clamped with the face frame after passing through the clamping hole; a handle device is arranged on the box door, and the handle device is connected with the door lock device; the handle device is used to control the door lock device to enter a self-locking state or a tripping state. In the locked state, the door lock device can enter the self-locking state by pressing the handle device downward, so as to solve the problem that the box door may be tripped when being pressed; and the door lock device can enter the tripping state by lifting the handle device upward, so as to open the box door. This door lock structure needs to be manually self-locked, which is very troublesome, and it cannot detect high temperature, thus having safety hazard. SUMMARY

[0004] The utility model aims at the defects and deficiencies of the prior art, and provides a door lock structure with high temperature detection self-locking function to prevent the high-temperature steam in the interior of the electric appliance from hurting people when the door is opened.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: the door lock structure with high temperature detection self-locking function includes a lock catch shell, a catch hook is arranged in the lock catch shell, the catch hook is hingedly connected with the lock catch shell, the catch hook can be rotated forward to a locking state and rotated backward to an unlocking state, a self-locking movable block is hingedly connected with the bottom of the catch hook, the self-locking movable block moves to the rear side when the catch hook is in the locking state, and the self-locking movable block moves to the front side when the catch hook is in the unlocking state.

[0006] The rear side of the self-locking movable block is provided with a limiting hook capable of extending rearward to lock the lock shell, an electromagnet is arranged on the side of the lock shell, and a temperature detection switch is arranged on the end of the electromagnet; when the electric appliance works, the electromagnet is powered, the push rod of the electromagnet extends forward to be inserted into the hook groove of the limiting hook, the self-locking movable block is locked, and the temperature detection switch is turned on at the same time, the temperature detection switch is connected with the temperature sensor inside the electric appliance; when the electric appliance stops working, the temperature sensor senses that the temperature inside the electric appliance is higher than the set value, the electric appliance control system still supplies power to the electromagnet until the temperature is lower than the set value, the electromagnet is powered off, the push rod of the electromagnet is reset, the locking of the self-locking movable block is released, and the temperature detection switch is turned off at the same time.

[0007] The rear end of the electromagnet is provided with a temperature detection switch, the temperature detection switch is a normally closed switch, the rear end of the push rod abuts against the contact of the temperature detection switch when the electromagnet is in the power-off state, the temperature detection switch is turned off, and the rear end of the push rod is away from the contact of the temperature detection switch when the electromagnet is in the power-on state, the temperature detection switch is connected, and the temperature sensor starts to work.

[0008] The front end of the electromagnet is provided with a temperature detection switch, the temperature detection switch is a normally open switch, the temperature detection switch is turned off when the electromagnet is in the power-off state, the front end of the push rod extends and abuts against the contact of the temperature detection switch when the electromagnet is in the power-on state, the temperature detection switch is connected, and the temperature sensor starts to work.

[0009] The push rod of the electromagnet is provided with a reset spring, the reset spring can reset the push rod rearward after the electromagnet is powered off.

[0010] A push spring is arranged at the bottom of the self-locking movable block, and the push spring provides self-locking force for the self-locking movable block and the hook.

[0011] A signal transmission switch is arranged outside the lock shell, a switch pressing plate is arranged in front of the contact of the signal transmission switch, and the hook can press down the switch pressing plate and abut against the contact of the signal transmission switch when the hook rotates forward to the locked state.

[0012] Two guide rods are arranged at the rear side of the switch pressing plate, the guide rods are inserted into the lock shell, and a pressing plate spring is sleeved on the guide rods.

[0013] The utility model can be applied to electric appliance products in high-temperature application scenes such as dishwashers and steam ovens, and no matter whether the electric appliance works, as long as the temperature inside the electric appliance is higher than the set value, the electromagnet always locks the self-locking movable block, the door plate of the electric appliance cannot be opened, the electromagnet releases the locking of the self-locking movable block only when the temperature decreases to the set value, the door plate can be opened, steam cannot hurt people, and the utility model has the advantages of simple structure and safety and reliability. ACCURACY OF DRAWINGS

[0014] Figure 1 The utility model structural exploded view.

[0015] Figure 2 The utility model structure diagram of the clasp in the locked state.

[0016] Figure 3 The utility model structure diagram of the clasp in the unlocked state.

[0017] Figure 4 The utility model structure diagram of the electromagnet power on.

[0018] Figure 5 The utility model structure diagram of the electromagnet power off.

[0019] Figure 6 The utility model structure diagram of the electromagnet power on of another embodiment.

[0020] Figure 7 The utility model structure diagram of the electromagnet power off. Figure 6 Specific embodiment

[0021] As Figure 1 shown, the utility model discloses a door lock structure with high temperature detection self-locking function, it includes the lock catch casing 1, installs the clasp 5 in the lock catch casing 1, the clasp 5 is hinged with the lock catch casing 1 through the first pin 4, the clasp 5 can rotate to the locking state to the front, rotates to the unlocking state to the back.The bottom of clasp 5 is provided with two hinged ears, installs the self-locking movable block 7 in two hinged ears, the second pin 6 passes through the hinged ear and self-locking movable block 7, makes the self-locking movable block 7 with clasp 5 hinged.

[0022] Combining Figure 2 , Figure 3 , the clasp 5 is in the locked state, the self-locking movable block 7 moves to the back, when the clasp 5 is in the unlocked state, the self-locking movable block 7 moves to the front.The bottom of self-locking movable block 7 is provided with the push spring 12, and the push spring 12 provides the self-locking force for the self-locking movable block 7 and the clasp 5.The outside of push spring 12 is provided with spring limit cover, and the push spring 12 is convenient to dismount.

[0023] ​The lock housing 1 is provided with a signal transmission switch 8, and a switch pressing plate 9 is arranged in front of the contact of the signal transmission switch 8. When the hook 5 is rotated forward to the locking state, the switch pressing plate 9 can be pressed and abut against the contact of the signal transmission switch 8. The rear side of the switch pressing plate 9 is provided with two guide rods which are inserted into the lock housing 1, and a pressing spring 11 is sleeved on the guide rods. When the hook 5 is rotated backward to the unlocking state, the restoring force of the pressing spring 11 can reset the switch pressing plate 9 and make it away from the contact of the signal transmission switch 8. The signal transmission switch 8 can be provided with two, which can respectively transmit the door closing signal and the self-locking signal.

[0024] In combination Figure 4 , Figure 5 , the rear side of the self-locking movable block 7 is provided with a limiting hook 7.1 which can extend backward out of the lock housing 1. An electromagnet 2 is arranged at the rear side of the lock housing 1. When the electromagnet 2 is powered, the push rod 2.1 of the electromagnet 2 can be inserted into the hook groove of the limiting hook 7.1, so as to lock the self-locking movable block 7 and make the door panel of the electric appliance unable to be opened. The push rod 2.1 of the electromagnet 2 is provided with a reset spring. After the electromagnet 2 is powered off, the reset spring can make the push rod 2.1 reset backward, so as to release the locking of the self-locking movable block 7 and make the door panel of the electric appliance able to be opened. The lock housing 1 is provided with an electromagnet box body 1.1, and the electromagnet 2 is arranged in the electromagnet box body 1.1. An electromagnet cover body 1.2 is arranged on the electromagnet box body 1.1. After the electromagnet box body 1.1 and the electromagnet cover body 1.2 are buckled, the electromagnet 2 can be closed, so as to play a protection role.

[0025] The end of the electromagnet 2 is provided with a temperature detection switch 3. When the electric appliance is working, the electromagnet 2 is powered, the push rod 2.1 of the electromagnet 2 can be inserted into the hook groove of the limiting hook 7.1, so as to lock the self-locking movable block 7 and make the temperature detection switch 3 conductive. The temperature detection switch 3 is connected with a temperature sensor in the electric appliance. The temperature sensor can convert the temperature in the electric appliance into an electric signal and transmit the electric signal to the control system of the electric appliance. When the electric appliance stops working and the temperature sensor senses that the temperature in the electric appliance is higher than the set value, the control system of the electric appliance still supplies power to the electromagnet 2. Until the temperature is lower than the set value, the electromagnet 2 is powered off, the push rod 2.1 of the electromagnet 2 is reset, and the locking of the self-locking movable block 7 is released, and the temperature detection switch 3 is disconnected.

[0026] The rear end of the electromagnet 2 is provided with a temperature detection switch 3, which is a normally closed switch; when the electromagnet 2 is in a power-off state, the rear end of the push rod 2.1 abuts against the contact of the temperature detection switch 3, the temperature detection switch 3 is disconnected, and the electromagnet 2 is in a power-on state; when the rear end of the push rod 2.1 is away from the contact of the temperature detection switch 3, the temperature detection switch 3 is connected, and the temperature sensor starts to work.

[0027] As shown in Figure 6 、 Figure 7 In another embodiment, the front end of the electromagnet 2 is provided with a temperature detection switch 3, which is a normally open switch; when the electromagnet 2 is in a power-off state, the temperature detection switch 3 is disconnected; when the electromagnet 2 is in a power-on state, the front end of the push rod 2.1 extends and abuts against the contact of the temperature detection switch 3, the temperature detection switch 3 is connected, and the temperature sensor starts to work. After the electric appliance stops working, the temperature sensor senses that the internal temperature of the electric appliance is higher than the set value; the control system of the electric appliance still supplies power to the electromagnet 2 until the temperature is lower than the set value, the electromagnet 2 is powered off, the push rod 2.1 of the electromagnet 2 is reset, the locking of the self-locking movable block 7 is released, and the push rod 2.1 is away from the contact of the temperature detection switch 3, so that the temperature detection switch 3 is disconnected.

[0028] The utility model can be applied to the electric appliance products in high-temperature application scenes such as dishwashers and steam ovens. Whether the electric appliance works or not, as long as the internal temperature of the electric appliance is higher than the set value, the electromagnet 2 always locks the self-locking movable block 7, and the door plate of the electric appliance cannot be opened. Only when the temperature is reduced to the set value, the electromagnet 2 releases the locking of the self-locking movable block 7, and the door plate can be opened, so that the steam does not hurt people. The utility model has the advantages of simple structure and safety and reliability.

Claims

1. A door lock structure with a high-temperature detection self-locking function, comprising a latch housing, a latch hook installed inside the latch housing, the latch hook being hinged to the latch housing, the latch hook being able to rotate forward to a locked state and backward to an unlocked state; a self-locking movable block is hinged to the bottom of the latch hook, the self-locking movable block moving to the rear side when the latch hook is in the locked state, and moving to the front side when the latch hook is in the unlocked state; Its features are, The self-locking movable block is provided with a limit hook on its rear side, which can extend backward out of the locking housing. An electromagnet is provided on the side of the locking housing, and a temperature detection switch is installed at the end of the electromagnet. When the electrical appliance is working, the electromagnet is energized, and the push rod of the electromagnet extends forward to insert into the hook groove of the limit hook, locking the self-locking movable block. At the same time, it can turn on the temperature detection switch, which is connected to the temperature sensor inside the electrical appliance. When the electrical appliance stops working, the temperature sensor senses that the internal temperature of the electrical appliance is higher than the set value. The electrical appliance control system continues to supply power to the electromagnet until the temperature is lower than the set value. Then, the electromagnet is de-energized, the push rod of the electromagnet resets, releasing the lock on the self-locking movable block, and the temperature detection switch is turned off.

2. The door lock structure with high-temperature detection self-locking function according to claim 1, characterized in that... A temperature detection switch is installed at the rear end of the electromagnet. The temperature detection switch is a normally closed switch. When the electromagnet is de-energized, the rear end of the push rod abuts against the contact of the temperature detection switch, and the temperature detection switch is open. When the electromagnet is energized, the rear end of the push rod moves away from the contact of the temperature detection switch, and the temperature detection switch is connected, and the temperature sensor starts to work.

3. The door lock structure with high-temperature detection and self-locking function according to claim 1, characterized in that... A temperature detection switch is installed at the front end of the electromagnet. This temperature detection switch is a normally open switch. When the electromagnet is de-energized, the temperature detection switch is open. When the electromagnet is energized, the front end of the push rod extends and abuts against the contact of the temperature detection switch, thus connecting the temperature detection switch and starting the temperature sensor to work.

4. The door lock structure with high-temperature detection self-locking function according to any one of claims 1-3, characterized in that... The push rod of the electromagnet is equipped with a return spring. After the electromagnet is de-energized, the return spring can cause the push rod to return to its original position.

5. The door lock structure with high-temperature detection self-locking function according to any one of claims 1-3, characterized in that... A push spring is provided at the bottom of the self-locking movable block, which provides a self-locking force for the self-locking movable block and the hook.

6. The door lock structure with high-temperature detection self-locking function according to any one of claims 1-3, characterized in that... A signal transmission switch is provided on the outside of the latch housing. A switch pressure plate is provided in front of the contact of the signal transmission switch. When the latch is rotated forward to the locked state, the switch pressure plate can be pressed down and abut against the contact of the signal transmission switch.

7. The door lock structure with high-temperature detection self-locking function according to claim 6, characterized in that... Two guide rods are provided on the rear side of the switch plate. The guide rods are inserted into the latch housing, and a pressure plate spring is fitted on the guide rods.

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