Simple door lock mechanism for dishwasher

Abstract

A simple door lock mechanism for a dishwasher comprises a lock body mounted on a door panel and a retractable lock catch mounted on an inner tank, a slot for the lock catch to be inserted is provided on the lock body, a slide groove perpendicular to the slot is provided in the lock body, the top of the slide groove is communicated with the slot; a slider is installed in the slide groove, the top of the slider is a convex hook, the convex hook partially extends into the slot, the front and rear sides of the convex hook are both inclined, and a compression spring is installed at the bottom of the slider; the front end of the lock catch is a cylinder, a lock hole is provided on the rear side of the cylinder, when the lock catch is inserted into the slot, the cylinder contacts the inclined surface of the convex hook and can push the slider down. When the lock catch of the utility model is inserted into the lock body, the cylinder of the lock catch contacts the inclined surface of the convex hook and pushes the slider down until the convex hook is embedded in the lock hole, blocking the lock catch from being withdrawn backwards, so as to achieve the purpose of locking the door. It has the advantages of simple structure, convenient installation, stability and reliability, and has good market prospects.

Description

Technical Field

[0001] The utility model relates to a door lock structure of a dishwasher, in particular to a door lock structure of a dishwasher with a micro switch. Background Art

[0002] In order to ensure the sealing and safety of the dishwasher during washing, a door lock assembly is generally installed on the dishwasher door to lock the door. The structure of the ordinary door lock mechanism is relatively complicated and the installation is not convenient.

[0003] The patent number 201120393319.7 published by the Chinese Patent Office on June 20, 2012, is a door lock assembly for a household dishwasher, comprising a door lock buckle on an inner tank and a door lock assembly on an inner door; the door lock assembly comprises a main body, left and right swing arms, a switch lever, left and right micro switches, a reset spring and a waterproof cover; wherein the left and right micro switches are respectively fixed on both sides of the main body, the left and right swing arms are rotatably arranged in the left and right openings of the main body, respectively, the first and second inclined surfaces on the upper parts of the left and right swing arms correspond to the sockets of the main body and can be matched with the second and first inclined surfaces of the lock buckle; the two ends of the switch lever are rotatably placed in the mounting grooves on both sides of the main body, switch pressing blocks are provided at the two ends of the switch lever and a longitudinal switch top rod is provided in the middle thereof, the switch pressing block can be matched with the contact of the micro switch, and the switch top rod can be matched with the door lock buckle; one end of the reset spring is fixed on the mounting position of the switch lever, and the other end is pressed on the waterproof cover, and the waterproof cover is locked and matched with the main body. This structure is relatively complicated and inconvenient to install. Summary of the invention

[0004] The purpose of the utility model is to provide a door lock mechanism for a dishwasher which is simple in structure, easy to install, stable and reliable, in view of the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the simple door lock mechanism of the dishwasher comprises a lock body installed on the door panel and a retractable lock buckle installed on the inner tank, a slot for the lock buckle to be inserted into the lock body is provided on the lock body, a slide groove perpendicular to the slot is provided in the lock body, and the top of the slide groove is communicated with the slot; a slider is installed in the slide groove, the top of the slider is a convex hook, the convex hook partially extends into the slot, the front and rear sides of the convex hook are both inclined surfaces, and a compression spring is installed at the bottom of the slider; the front end of the lock buckle is a cylinder, and a lock hole is provided on the rear side of the cylinder, and when the lock buckle is inserted into the slot, the cylinder can push the slider downward after contacting the inclined surface of the convex hook.

[0006] A switch pressure plate is hinged above the slider, and the switch pressure plate includes a touch end at the top and a pressing end extending to the side at the bottom. The touch end is located on the rear side of the convex hook of the slider. After the cylinder of the lock slides over the convex hook, it can abut against the touch end and push the switch pressure plate to rotate; a micro switch is installed on the side of the lock body, and when the switch pressure plate rotates, the pressing end can press the micro switch contact.

[0007] The switch pressing plate is hinged with the slide block through a pin shaft, and a reset torsion spring is sleeved on the pin shaft.

[0008] The switch pressing plate is provided with a rotation limit block, and the minimum distance between the pressing end and the convex hook is limited by the rotation limit block.

[0009] The slide groove is closed on three sides, and a cover plate is installed at the rear opening.

[0010] The inner wall of the slide groove and the outer wall of the slide block are provided with limiting convex ribs, and the limiting convex ribs limit the height of the slide block moving upward.

[0011] The slope of the inclined surface on one side of the convex hook opposite to the lock buckle is smaller than that of the inclined surface on the other side.

[0012] The bottom of the sliding block is provided with a concave hole, and the upper end of the compression spring is inserted into the concave hole.

[0013] When the lock buckle of the utility model is inserted into the lock body, the cylinder of the lock buckle contacts the inclined surface of the convex hook, pushing the slider downward until it slides over the high point of the convex hook. Under the action of the restoring force of the compression spring, the slider resets upward and causes the convex hook to be embedded in the lock hole, preventing the lock buckle from being pulled out backward, so as to achieve the purpose of locking the door. At the same time, the cylinder of the lock buckle presses the touch end of the switch pressure plate, causing the switch pressure plate to rotate, and the pressing end presses the micro switch contact to control its connection. When the pulling force after the lock buckle is large enough, the slider can be forced to move downward and disengage from the lock buckle to achieve the purpose of unlocking. At the same time, the switch pressure plate is reset under the action of the reset torsion spring, which releases the pressure on the micro switch contact and disconnects the micro switch. It has the advantages of simple structure, easy installation, stability and reliability, and has good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional exploded schematic diagram of the utility model.

[0015] Figure 2 This is a cross-sectional view of the lock buckle of the utility model before insertion.

[0016] Figure 3 This is a cross-sectional view of the utility model after the lock buckle is inserted.

[0017] Figure 4 It is a three-dimensional schematic diagram of the lock buckle of the utility model.

[0018] Figure 5It is a three-dimensional schematic diagram of the switch pressure plate and the slider of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, the utility model is a simple door lock mechanism for a dishwasher, which includes a lock body 20 installed on the door panel and a retractable lock buckle 10 installed on the inner tank. A slot 21 for the lock buckle 10 to be inserted is provided on the lock body 20, and a slide groove 22 perpendicular to the slot 21 is provided in the lock body 20, and the top of the slide groove 22 is connected to the slot 21. The slide groove 22 is closed on three sides, and a cover plate 80 is installed at the rear opening. A slider 30 is installed in the slide groove 22. After the cover plate 80 is opened, the slider 30 can be embedded in the slide groove 22, and then the cover plate 80 is covered to limit the rear side of the slider 30 so that it can only move up and down. A concave hole 32 is provided at the bottom of the slider 30, and a compression spring 70 is installed below the slider 30. The upper end of the compression spring 70 is inserted into the concave hole 32, and the restoring force of the compression spring 70 gives the slider 30 an upward thrust. The inner wall of the slide groove 22 and the outer wall of the slider 30 are provided with limiting ribs 23 , 33 , which limit the height of the slider 30 when it moves upward.

[0020] like Figure 2 , Figure 3 , Figure 4 As shown, the top of the slider 30 is a convex hook 31, which partially extends into the slot 21, and the front and rear sides of the convex hook 31 are both inclined surfaces. The front end of the lock buckle 10 is a cylinder 11, and the rear side of the cylinder 11 is provided with a lock hole 12. When the lock buckle 10 is inserted into the lock body 20, the cylinder 11 of the lock buckle 10 contacts the inclined surface of the convex hook 31, and pushes the slider 30 downward until it slides over the high point of the convex hook 31. Under the action of the restoring force of the compression spring 70, the slider 30 is reset upward, and the convex hook 31 is embedded in the lock hole 12, blocking the lock buckle 10 from being withdrawn backward, so as to achieve the purpose of locking the door. When the pulling force behind the lock buckle 10 is large enough, the slider 30 can be forced to move downward and disengage from the lock buckle 10 to achieve the purpose of unlocking. The slope of the inclined surface on one side of the convex hook 31 opposite to the lock buckle 10 is smaller than that on the other side, so the force required to lock the door is less than that to unlock.

[0021] like Figure 5As shown, a switch pressing plate 40 is hinged on the top of the slider 30, and the switch pressing plate 40 includes a touch end 41 at the top and a pressing end 42 extending to the side at the bottom. The touch end 41 is located at the rear side of the convex hook 31 of the slider 30. After the cylinder 11 of the lock catch 10 slides over the convex hook 31, it can contact with the touch end 41 and push the switch pressing plate 40 to rotate. A micro switch 90 is installed on the side of the lock body 20. When the switch pressing plate 40 rotates, the pressing end 42 can press the contact 91 of the micro switch 90, so that the dishwasher host can receive the signal of the micro switch 90. The switch pressing plate 40 is hinged with the slider 30 through a pin 50, and a reset torsion spring 60 is mounted on the pin 50. After the lock catch 10 is unlocked, the switch pressing plate 40 is reset by the reset torsion spring 60, and the pressing end 42 leaves the contact 91 of the micro switch 90, so that the dishwasher host cannot receive the signal of the micro switch 90. The switch pressing plate 40 is provided with a rotation limit block 43 , which limits the minimum distance between the pressing end 42 and the convex hook 31 , so that the lock buckle 10 can effectively press the actuating end 41 of the switch pressing plate 40 when inserted into the lock body 20 .

[0022] When the lock buckle 10 of the utility model is inserted into the lock body 20, the cylinder 11 of the lock buckle 10 contacts the inclined surface of the convex hook 31, and pushes the slider 30 downward until it slides over the high point of the convex hook 31. The slider 30 is reset upward under the action of the restoring force of the compression spring 70, and the convex hook 31 is embedded in the lock hole 12, blocking the lock buckle 10 from being withdrawn backward, so as to achieve the purpose of locking the door. At the same time, the cylinder 11 of the lock buckle 10 presses the touch end 41 of the switch pressing plate 40, so that the switch pressing plate 40 rotates, and the pressing end 42 presses the contact 91 of the micro switch 90 to control its connection. When the tension behind the lock buckle 10 is large enough, the slider 30 can be forced to move downward and disengage from the lock buckle 10 to achieve the purpose of unlocking. At the same time, the switch pressing plate 40 is reset under the action of the reset torsion spring 60, and the pressure on the contact 91 of the micro switch 90 is released, so that the micro switch 90 is disconnected. It has the advantages of simple structure, convenient installation, stability and reliability, and has a good market prospect.

Claims

1. A simple door lock mechanism for a dishwasher, comprising a lock body mounted on a door panel and a retractable lock buckle mounted on an inner tank, wherein a slot for the lock buckle to be inserted is provided on the lock body, and the feature is The lock body is provided with a slide groove perpendicular to the slot, and the top of the slide groove is communicated with the slot; a slider is installed in the slide groove, the top of the slider is a convex hook, the convex hook partially extends into the slot, the front and rear sides of the convex hook are both inclined surfaces, and a compression spring is installed at the bottom of the slider; the front end of the lock buckle is a cylinder, and a lock hole is provided on the rear side of the cylinder. When the lock buckle is inserted into the slot, the cylinder can push the slider downward after contacting the inclined surface of the convex hook.

2. The simple door lock mechanism of the dishwasher according to claim 1, characterized in that A switch pressure plate is hinged above the slider, and the switch pressure plate includes a touch end at the top and a pressing end extending to the side at the bottom. The touch end is located on the rear side of the convex hook of the slider. After the cylinder of the lock slides over the convex hook, it can abut against the touch end and push the switch pressure plate to rotate; a micro switch is installed on the side of the lock body, and when the switch pressure plate rotates, the pressing end can press the micro switch contact.

3. The simple door lock mechanism of the dishwasher according to claim 2, characterized in that The switch pressing plate is hinged with the slide block through a pin shaft, and a reset torsion spring is sleeved on the pin shaft.

4. The simple door lock mechanism of the dishwasher according to claim 2, characterized in that The switch pressing plate is provided with a rotation limit block, and the minimum distance between the pressing end and the convex hook is limited by the rotation limit block.

5. The simple door lock mechanism of the dishwasher according to any one of claims 1 to 4, characterized in that The slide groove is closed on three sides, and a cover plate is installed at the rear opening.

6. The simple door lock mechanism of a dishwasher according to any one of claims 1 to 4, characterized in that The inner wall of the slide groove and the outer wall of the slide block are provided with limiting convex ribs, and the limiting convex ribs limit the height of the slide block moving upward.

7. The simple door lock mechanism of a dishwasher according to any one of claims 1 to 4, characterized in that The slope of the inclined surface on one side of the convex hook opposite to the lock buckle is smaller than that of the inclined surface on the other side.

8. The simple door lock mechanism of a dishwasher according to any one of claims 1 to 4, characterized in that The bottom of the sliding block is provided with a concave hole, and the upper end of the compression spring is inserted into the concave hole.

Images