An electronic household appliance door lock

Abstract

The present invention provides a household appliance door lock. The door lock device is installed on an electrical appliance cabinet body. The door lock device has a keyhole for a lock core to be inserted. The door lock device is provided with a base body, a pressing block, a locking body equipped with a locking body torsion spring, an operating plate equipped with an operating plate torsion spring, a swing rod and a detection switch. The locking body is rotatably arranged in the base body. The pressing block is connected to the operating plate and movably installed in the base body, and can move along the direction in which the lock core is inserted. When the lock core is inserted into the keyhole, the pressing block moves under the abutting action of the lock core. The locking body rotates under the action of the pressing block. The swing rod is rotatably installed in the base body. The swing rod is arranged between the operating plate and the detection switch, and the swing rod rotates under the drive of the operating plate to trigger the detection switch. After the lock core is pulled out of the keyhole, under the action of the operating plate torsion spring, the pressing block abuts against the keyhole to cooperate to block the keyhole. This door lock device can avoid mis-triggering of the door lock, is overall beautiful, and has no keyhole exposed.

Description

Technical Field

[0001] The present invention relates to the technical field of door locks, and in particular to a door lock for household appliances.

Background Art

[0002] After the current door lock structure is installed on a household appliance, as shown in the attachment Figure 1 From the outside of the appliance, there is an obvious keyhole at the position of the door lock. This keyhole has the following problems:

[0003] 1. Having a keyhole exposed on the appearance surface affects the aesthetics of the appliance.

[0004] 2. With the keyhole exposed outside, foreign objects, dust, etc. are likely to enter the keyhole and are not easily removed, causing blockage and affecting the normal operation of the door lock.

[0005] 3. When there is a large amount of water stain on the keyhole, water is likely to seep into the door lock from the keyhole, causing damage to the door lock and water accumulation inside the appliance.

[0006] 4. When the door is not closed, the user may manually trigger the door lock to the locked state, resulting in the appliance starting when the door is not closed.

Summary of the Invention

[0007] The object of the present invention is to solve the problems in the prior art and propose a door lock for household appliances that can avoid mis-triggering of the door lock, is overall beautiful, and has no exposed keyhole.

[0008] To achieve the above object, the present invention proposes a door lock for household appliances. The door lock device is installed on the appliance cabinet body. The door lock device has a keyhole for inserting a lock head. The door lock device is provided with a base body, a pressing block, a locking body equipped with a locking body torsion spring, an operation board equipped with an operation board torsion spring, a swing rod, and a detection switch. The locking body is rotatably arranged in the base body. The pressing block is connected to the operation board and is movably installed in the base body and can move along the direction of the lock head insertion. When the lock head is inserted into the keyhole, the pressing block moves under the abutting action of the lock head. The locking body rotates under the action of the pressing block. The swing rod is rotatably installed in the base body. The swing rod is arranged between the operation board and the detection switch and rotates to trigger the detection switch under the drive of the operation board. After the lock head is pulled out from the keyhole, the operation board torsion spring has a force opposite to the lock head insertion direction on the operation board. Under the action of the operation board torsion spring, the pressing block abuts against the keyhole to cooperate and block the keyhole.

[0009] Preferably, the locking body is provided with a locking tongue and a crank. There is a U-shaped bayonet between the locking tongue and the crank. The crank is arranged directly below the keyhole. When the lock head is inserted into the keyhole, the crank abuts against the pressing block. Under the action of the pressing block, the locking body rotates. The crank has a force on the pressing block in the direction opposite to the insertion direction of the lock head. The lock head is provided with a locking groove that cooperates with the locking tongue. Under the action of the crank, the locking body rotates and the locking tongue snaps into the locking groove.

[0010] Preferably, one side of the pressing block close to the crank has a step, and the step abuts against the crank to drive the locking body to rotate. Above the pressing block, there is a sealing plate for blocking the keyhole. The upper end surface of the sealing plate is the appearance surface. Below the sealing plate, there is a card slot, and a sealing strip is installed on the card slot.

[0011] Preferably, the swing rod is rotatably installed on one side of the detection switch. One side of the swing rod close to the operation plate has a convex portion, and one side of the operation plate has a push block that abuts against the convex portion. Under the action of the push block, the swing rod rotates towards the detection switch to trigger the detection switch.

[0012] Preferably, the pressing block and the operation plate are connected by a sliding rod. The base body is provided with a guiding cavity for the sliding rod to move along the insertion direction of the lock head. An O-ring is installed in the guiding cavity, and the O-ring is closely fitted with the sliding rod.

[0013] Preferably, a locking body housing is further provided in the base body. The locking body is rotatably installed in the locking body housing. The locking body housing has a keyhole, and a locking body upper cover is further installed on the locking body housing. A housing is further installed on the base body.

[0014] Advantages of the present invention: Through the cooperation of the pressing block, locking body, operation plate, swing rod and detection switch, etc., in the state where the door cover is not closed, the pressing block can block the keyhole under the action of the torsion spring of the operation plate, ensuring overall aesthetics and no exposure of the keyhole. It can not only reduce the entry of foreign objects, dust, etc. into the keyhole, but also prevent water stains from seeping into the keyhole to damage the door lock; when the door cover is not closed and a foreign object other than the door hook is inserted into the keyhole, the detection switch cannot be triggered to the locked state, which can prevent the electrical appliance from being accidentally started.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Description of the Drawings

[0016] Figure 1 It is a cross-sectional view of the door lock installed in an electrical appliance in the prior art;

[0017] Figure 2 It is a cross-sectional view of the structure of the door lock device of the present invention before closing the door cover;

[0018] Figure 3 Cross-sectional view of the action structure of the door lock device of the present invention when closing the door cover;

[0019] Figure 4 Cross-sectional view of the structure of the door lock device of the present invention after closing the door cover;

[0020] Figure 5 Cross-sectional view of the structure of the door lock device of the present invention when opening the door;

[0021] Figure 6 Cross-sectional view of the structure of the door lock device of the present invention in an abnormal state;

[0022] Figure 7 Exploded view of the structure of the door lock device of the present invention;

[0023] Figure 8 Structure diagram of the pressure block of the door lock device of the present invention;

[0024] Figure 9 Structure diagram of the locking body of the door lock device of the present invention.

[0025] Corresponding reference numerals in the figure: 100 household appliances, 101 door cover, 102 electrical cabinet, 103 existing door lock, 104 door hook, 105 lock head, 106 lock hole, 200 door lock device, 210 base body, 220 housing, 230 pressure block, 231 card slot, 232 step, 233 sealing plate, 240 locking body, 241 lock tongue, 242 crank, 250 locking body torsion spring, 270 sealing strip, 280 O-ring, 290 operation board, 300 swing rod, 310 operation board torsion spring, 320 detection switch, 330 locking body housing, 340 locking body upper cover.

Detailed implementation manner

[0026] Refer to Figures 2 to 7A household appliance door lock according to the present invention, the door lock device 200 is installed on the electrical appliance box body 102. The door lock device 200 has a lock hole 106 for inserting the lock head 105. The door lock device 200 is provided with a base body 210, a pressing block 230, a locking body 240 equipped with a locking body torsion spring 250, an operation plate 290 equipped with an operation plate torsion spring 310, a swing rod 300 and a detection switch 320. The locking body 240 is rotatably arranged in the base body 210. The pressing block 230 is connected to the operation plate 290 and is movably installed in the base body 210, and can move along the insertion direction of the lock head 105. When the lock head 105 is inserted into the lock hole 106, the pressing block 230 moves under the abutting action of the lock head 105. The locking body 240 rotates under the action of the pressing block 230. The swing rod 300 is rotatably installed in the base body 210. The swing rod 300 is arranged between the operation plate 290 and the detection switch 320. The swing rod 300 rotates under the drive of the operation plate 290 to trigger the detection switch 320. After the lock head 105 is pulled out from the lock hole 106, the operation plate torsion spring 310 has a force on the operation plate 290 opposite to the insertion direction of the lock head 105. Under the action of the operation plate torsion spring 310, the pressing block 230 abuts against the lock hole 106 to cooperate to block the lock hole 106.

[0027] Further, referring to Figure 9 , the locking body 240 has a locking tongue 241 and a crank 242. There is an approximately U-shaped bayonet between the locking tongue 241 and the crank 242. The crank 242 is arranged directly below the lock hole 106. When the lock head 105 is inserted into the lock hole 106, the crank 242 abuts against the pressing block 230 to cooperate. The locking body 240 rotates under the action of the pressing block 230. The crank 242 has a force on the pressing block 230 opposite to the insertion direction of the lock head 105. The lock head 105 has a locking groove cooperating with the locking tongue 241. The locking body 240 rotates under the action of the crank 242, and the locking tongue 241 snaps into the locking groove.

[0028] Further, referring to Figure 8 , one side of the pressing block 230 close to the crank 242 has a step 232. The step 232 abuts against the crank 242 to cooperate to drive the locking body 240 to rotate. A sealing plate 233 for blocking the lock hole 106 is arranged above the pressing block 230. The upper end surface of the sealing plate 233 is the appearance surface. A clamping groove 231 is arranged below the sealing plate 233. A sealing strip 270 is installed on the clamping groove 231.

[0029] Further, the swing rod 300 is rotatably installed on one side of the detection switch 320. A convex portion is provided on the side of the swing rod 300 close to the operation panel 290. A push block for abutting and cooperating with the convex portion is provided on one side of the operation panel 290. After the lock head 105 is completely inserted into the lock hole 106, the convex portion and the push block are in a state of abutting against each other. Under the action of the push block, the swing rod 300 rotates towards the side close to the detection switch 320 to trigger the detection switch 320. When the push block is disengaged from the convex portion, the swing rod 300 does not trigger the detection switch 320. When a foreign object other than the door hook is inserted into the lock hole, the push block is disengaged from the convex portion, and the detection switch cannot be touched to the locked state, which can avoid the problem of the electrical appliance being accidentally started without closing the door cover.

[0030] Further, the pressing block 230 and the operation panel 290 are connected by a sliding rod. A guiding cavity for the sliding rod to move along the insertion direction of the lock head 105 is provided on the base body 210. An O-ring 280 is installed in the guiding cavity. The O-ring 280 is in close fit with the sliding rod, which can improve the connection tightness and prevent water stains from entering the electrical appliance.

[0031] Further, a locking body housing 330 is further provided in the base body 210. The locking body 240 is rotatably installed in the locking body housing 330. A lock hole 106 is provided on the locking body housing 330. A locking body upper cover 340 is further installed on the locking body housing 330. A housing 220 is further installed on the base body 210.

[0032] Working process of the present invention:

[0033] The working principle of a household appliance door lock of the present invention is as follows:

[0034] Open door state

[0035] As Figure 2 shown, in the open door state, a sealing strip 270 is installed in the card slot 231 of the pressing block 230. Under the action of the operation panel torsion spring 310, there is an upward acting force on the operation panel 290 and the pressing block 230. The sealing plate 233 makes the sealing strip 270 and the door lock housing 210 in close contact to achieve the waterproof function. The outer surface of the sealing plate 233 is flush with the electrical appliance box body, with seamless connection, which can prevent foreign objects and dust from entering.

[0036] Closing action

[0037] As Figure 3As shown, when the door cover is closed, the lock head 105 moves downward along direction A. The lock head 105 presses the pressing block 230 to move downward. When the step 232 of the pressing block 230 contacts the crank 242 of the locking body 240, it will drive the locking body 240 to rotate along direction B against the torsion of the locking body torsion spring 250, and the distance of the torsion spring decreases. When the locking body 240 rotates to a certain angle, the distance of the torsion spring is compressed to the minimum. When moving further, the distance of the torsion spring starts to increase again, and the direction of the torsion force starts to reverse. At this time, the locking tongue 241 acts on the lock head 105 to close the door cover. When the door cover is closed, there is an upward force on the lock head 105 to prevent the operation plate 290 from moving downward continuously, and at the same time, it hinders the operation plate torsion spring 310 from flipping further. At this time, the push block of the operation plate 290 and the convex part of the swing rod 300 are in a state of abutting against each other, and the operation plate 290 drives the swing rod 300 to rotate, triggering the detection switch 320.

[0038] Abnormal operation

[0039] As Figure 6 shown, when the door cover is not closed, if the pressing block 230 is pressed downward artificially at this time, the operation plate torsion spring 310 reaches the flipping point under the action of the force. Since there is no lock head 105 at this time, it is impossible to hinder the flipping of the operation plate torsion spring 310. As a result, the operation plate 290 continues to move downward under the drive of the operation plate torsion spring 310 until the operation plate 290 reaches the bottom end. At this time, the push block of the operation plate 290 and the convex part of the swing rod 300 are in a state of being disengaged from abutting against each other, and the detection switch 320 cannot be triggered.

[0040] Door opening operation

[0041] Figure 5 , when the lock head 105 is pulled upward along direction C, the lock head 105 acts on the locking tongue 241, forcing the locking body 240 to rotate along direction D against the torsion of the locking body torsion spring 250. The crank 242 of the locking body 240 acts on the step 232 of the pressing block 230 to move the sealing plate upward. After the locking body 240 rotates, the distance of the locking body torsion spring 250 decreases. When the locking body 240 rotates to a certain angle, the distance of the locking body torsion spring 250 is compressed to the minimum. When moving further, the distance of the locking body torsion spring 250 starts to increase again, and the direction of the torsion force starts to reverse. Under the action of the door opening force and the torsion of the locking body torsion spring 250, the door is opened. At this time, the sealing plate 233 seals the lock hole under the action of the operation plate torsion spring 310.

[0042] The above embodiments are illustrative of the present invention and not restrictive. Any solution obtained by simply transforming the present invention belongs to the protection scope of the present invention.

Claims

1. A household appliance door lock, wherein a door lock device (200) is installed on an appliance box body (102), and a keyhole (106) for inserting a lock core (105) is provided on the door lock device (200), characterized in that: The door lock device (200) is provided with a base body (210), a pressing block (230), a locking body (240) equipped with a locking body torsion spring (250), an operation plate (290) equipped with an operation plate torsion spring (310), a swing rod (300) and a detection switch (320). The locking body (240) is rotatably arranged in the base body (210). The pressing block (230) is connected to the operation plate (290) and is movably installed in the base body (210), and can move along the insertion direction of the lock head (105). When the lock head (105) is inserted into the lock hole (106), the pressing block (230) moves under the abutting action of the lock head (105), and the locking body (240) rotates under the action of the pressing block (230). The swing rod (300) is rotatably installed in the base body (210). The swing rod (300) is arranged between the operation plate (290) and the detection switch (320). The swing rod (300) rotates under the drive of the operation plate (290) to trigger the detection switch (320). After the lock head (105) is pulled out from the lock hole (106), the operation plate torsion spring (310) has a force on the operation plate (290) in the direction opposite to the insertion direction of the lock head (105). Under the action of the operation plate torsion spring (310), the pressing block (230) abuts against the lock hole (106) to cooperate with it to block the lock hole (106). The swing rod (300) is rotatably installed on one side of the detection switch (320). The side of the swing rod (300) close to the operation plate (290) has a convex part, and one side of the operation plate (290) has a push block that abuts against the convex part. Under the action of the push block, the swing rod (300) rotates towards the side close to the detection switch (320) to trigger the detection switch (320); When the door cover is not closed, if a person presses the pressing block (230) downwards at this time, the operation plate torsion spring (310) reaches the flipping point under the action of the force. Since there is no lock head (105) at this time, it cannot prevent the flipping of the operation plate torsion spring (310), so that the operation plate (290) continues to move downwards under the drive of the operation plate torsion spring (310) until the operation plate (290) reaches the bottommost end. At this time, the push block of the operation plate (290) and the convex part of the swing rod (300) are in a state of being disengaged from abutment, and the detection switch (320) cannot be triggered.

2. The household appliance door lock according to claim 1, wherein: The locking body (240) has a locking tongue (241) and a crank (242). There is an approximately U-shaped bayonet between the locking tongue (241) and the crank (242). The crank (242) is arranged directly below the lock hole (106). When the lock head (105) is inserted into the lock hole (106), the crank (242) abuts against the pressing block (230) to cooperate with it. The locking body (240) rotates under the action of the pressing block (230), and the crank (242) has a force on the pressing block (230) in the direction opposite to the insertion direction of the lock head (105). The lock head (105) has a locking groove that cooperates with the locking tongue (241). The locking body (240) rotates under the action of the crank (242), and the locking tongue (241) snaps into the locking groove.

3. The household appliance door lock according to claim 2, characterized in that: One side of the pressing block (230) close to the crank (242) is provided with a step (232), and the step (232) abuts against the crank (242) to drive the locking body (240) to rotate. Above the pressing block (230), there is a sealing plate (233) for plugging the lock hole (106). The upper end face of the sealing plate (233) is the appearance surface. Below the sealing plate (233), there is a clamping groove (231), and a sealing strip (270) is installed on the clamping groove (231).

4. The household appliance door lock according to claim 1, characterized in that: The pressing block (230) is connected to the operation plate (290) through a sliding rod. On the base body (210), there is a guiding cavity for the sliding rod to move along the insertion direction of the lock head (105). An O-ring (280) is installed in the guiding cavity, and the O-ring (280) is in close fit with the sliding rod.

5. The household appliance door lock according to claim 1, characterized in that: A locking body housing (330) is further provided in the base body (210). The locking body (240) is rotatably installed in the locking body housing (330). The locking body housing (330) has a lock hole (106). A locking body upper cover (340) is also installed on the locking body housing (330), and a housing (220) is installed on the base body (210).

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