A door lock and a cooking machine with the door lock

Abstract

The present invention relates to a lock, and particularly to a door lock and a cooking machine with the door lock. The door lock includes a lock catch assembly that can be installed on the door frame and a lock tongue assembly that can be installed on the door. One side of the lock box opposite to the lock tongue assembly is open. The back of the lock catch is connected to the bottom surface of the lock box through a hinge structure. The lock catch includes a hooking portion and a pressing portion arranged symmetrically with respect to the hinge structure. The pressure-receiving surface of the pressing portion and the buckling portion of the hooking portion face the opening. The lock tongue assembly includes a pressing frame with a pressing surface and a hook tongue. The hook tongue is hidden behind the pressing surface by an elastic structure. When the pressing frame applies pressure to the pressure-receiving surface with the pressing surface, the buckling portion rotates towards the pressing portion around the hinge structure and engages with the hook tongue to lock. This door lock has a simple structure, low production cost, high reliability, good closing effect, and can effectively prevent users from opening the door by brute force.

Description

Technical Field

[0001] The invention relates to a lock, in particular to a door lock and a cooking machine with the door lock. Background Art

[0002] Existing locks are mainly divided into two categories: electronic locks and mechanical locks. Mechanical locks are more stable than electronic locks. However, currently, hardware mechanical locks with better locking force usually have a more complex structure and high cost. Locks with simple structures are easily opened by brute force, especially for door locks of kitchen appliances with doors. There are roughly two situations:

[0003] 1. For heating appliances such as induction cookers, microwave ovens, ovens, etc., after closing the corresponding doors, they can be opened at any time by pulling the doors during the heating process, which poses a safety hazard to some elderly people and children with dementia;

[0004] 2. For home appliances such as refrigerators, the door is locked by magnetic suction, but the locking force is not enough. When there are many things stored in the refrigerator, the door is easily squeezed and opened, causing the food stored in the refrigerator to deteriorate. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a door lock which has high reliability, good closing effect and can effectively prevent being opened by brute force, and a cooking machine with the door lock.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] A door lock is provided, comprising a latch assembly that can be mounted on a door frame and a lock tongue assembly that can be mounted on a door, characterized in that the latch assembly comprises a lock box and a latch placed in the lock box, the lock box having an open side opposite to the lock tongue assembly, the back side of the latch being connected to the bottom surface of the lock box via a hinge structure, the latch comprising a hook portion and a pressure portion arranged with the hinge structure as a symmetry axis, the pressure-bearing surface of the pressure portion and the buckle portion of the hook portion facing the open side; the lock tongue assembly comprises a pressing frame with a pressing surface and a hook tongue, the hook tongue being hidden behind the pressing surface with an elastic structure, and when the pressing frame and the pressing surface apply pressure to the pressing surface, the buckle portion rotates around the hinge structure toward one side of the pressing portion and engages and locks with the hook tongue.

[0008] Furthermore, the hinged structure includes a fixed shaft, at least one ear plate extending backward is provided on the back of the lock buckle, an axis hole is provided on the ear plate, and an upper hole and a lower hole coaxial with the axis hole are respectively provided on the top cover and the bottom cover of the lock box, and the fixed shaft passes through the upper hole, the axis hole and the lower hole in sequence to install the lock buckle in the lock box.

[0009] Further, at least one limiting hole is provided on the bottom surface of the lock box, and a part of the ear plate behind the shaft hole is inserted into the limiting hole to limit the lock catch at a set position in the vertical direction.

[0010] Further, a torsion spring is sleeved on the fixed shaft, which can make the lock tongue assembly quickly bounce the door open when the lock catch assembly and the lock tongue assembly are disengaged from the engaged state.

[0011] Further, the hinge structure includes a connecting block provided on the back surface of the lock catch and an arc-shaped convex block provided on the bottom surface of the box. A groove adapted to the arc-shaped convex block is provided in the center of the connecting block, and the arc-shaped convex block can be embedded and clamped in the groove.

[0012] Further, socket columns are protruded at the top and bottom ends of the arc-shaped convex block, and a torsion spring is sleeved on the socket column, which can make the lock tongue assembly quickly bounce the door open when the lock catch assembly and the lock tongue assembly are disengaged from the engaged state.

[0013] Further, the lock tongue assembly further includes a base plate and a rotating handle installed on the door. The rotating handle is divided into a horizontal connecting arm and a vertical connecting arm from top to bottom. The rear end of the horizontal connecting arm passes through the base plate and is connected to the top end of the vertical connecting arm provided on the back surface of the base plate. The hook tongue is provided at the front end of the horizontal connecting arm. An installation column perpendicular to the base plate is protruded in the middle of the vertical connecting arm, and a button for easy pressing by the user is provided at the lower part. An installation hole is provided at a position on the back surface of the base plate opposite to the installation column, and the installation column is rotatably fixed in the installation hole. The pressing frame is provided on the front surface of the base plate.

[0014] Further, a butting plate bent backward is provided on the base plate, and a spring seat for sleeving the spring is provided on the rear part of the horizontal connecting arm on one side of the button. The spring is located between the spring seat and the butting plate.

[0015] Further, the lock tongue assembly is embedded and installed on the door edge, and the button is located on the side of the door.

[0016] A cooking machine with the door lock is provided, including a machine door and a machine frame. It is characterized in that the lock tongue assembly in the door lock is installed on the machine door, and a lock catch assembly adapted to the lock tongue assembly is installed at a position on the machine frame opposite to the lock tongue assembly.

[0017] When the pressing frame in the locking tongue assembly of the door lock of the present invention presses the pressing part in the locking buckle assembly, it triggers the hooking part in the locking buckle assembly to rotate in the horizontal plane and engage with the hooking tongue in the locking tongue assembly, thereby achieving the purpose of tightly closing the door. The structure has high reliability and effectively prevents users from using brute force to open the door. Compared with existing mechanical locks, the structure is simple and the precision requirement is low, effectively reducing the production cost; by pressing the button on the locking tongue assembly, the door will automatically pop open, effectively improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a diagram showing the positional relationship between the locking buckle assembly and the locking tongue assembly of the embodiment of the present invention when not locked;

[0019] Figure 2 FIG. is a diagram showing the positional relationship between the locking buckle assembly and the locking tongue assembly of the embodiment of the present invention when locked;

[0020] Figure 3 FIG. is one of the exploded views of the locking buckle assembly and the locking tongue assembly of the embodiment of the present invention;

[0021] Figure 4 FIG. is the second exploded view of the locking buckle assembly and the locking tongue assembly of the embodiment of the present invention;

[0022] Figure 5 FIG. is one of the exploded views of the block hinge structure of the locking buckle assembly of the embodiment of the present invention;

[0023] Figure 6 FIG. is the second exploded view of the block hinge structure of the locking buckle assembly of the embodiment of the present invention;

[0024] Figure 7 FIG. is a diagram showing the positional relationship between the locking buckle assembly and the locking tongue assembly in a cooking machine according to an embodiment of the present invention;

[0025] Figure 8 FIG. is a schematic diagram showing the locking tongue assembly installed on the door of a cooking machine according to an embodiment of the present invention;

[0026] Figure 9 FIG. is Figure 8 the partial enlarged view at A in

[0027] The reference numerals are as follows:

[0028] Lock catch assembly 100, lock tongue assembly 200, lock box 1, box bottom 10, upper hole 11, lower hole 12, limit hole 13, arc surface convex block 14, sleeve column 15, lock catch 2, pressing part 20, pressure surface 201, hook part 21, transfer arm 211, buckle part 212, fixed shaft 22, double torsion spring 23, ear plate 24, shaft hole 241, connecting block 25, groove 251, pressing frame 3, pressing surface 31, hook tongue 4, base plate 5, mounting hole 51, abutment plate 52, through hole 53, rotating handle 6, horizontal connecting arm 61, vertical connecting arm 62, mounting column 63, button 64, spring 7, spring seat 71, back plate 8, hole column 81, machine door 91, frame 92, fixing plate 93, pressing sleeve 95 DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] Combination Figures 1 to 4 As shown, the door lock of the present invention is mainly composed of a lock catch assembly 100 and a lock tongue assembly 200.

[0031] 1. Locking assembly 100

[0032] Combination Figures 1 to 4 As shown, the lock assembly 100 consists of a lock box 1, a hinged structure, and a lock 2. The lock box 1 is a rectangular box body with an opening on one side, which is embedded in the door frame with the opening facing outward (for the lock assembly 100, the direction toward the door is the front, and the opposite direction is the rear, the same below).

[0033] Combination Figures 3 to 6 As shown, the lock buckle 2 is a square hook shape, divided into a pressing part 20 and a hook part 21, and the hook part 21 is divided into a buckle part 212 and a transfer arm 211. The buckle part 212 is arranged in parallel with the pressing part 20, and is connected by the transfer arm 211. A buckling space with a certain angle is formed between the transfer arm 211 and the buckle part 212. The back of the lock buckle 2 is installed in the lock box 1 through a hinge structure. The lock buckle 2 can rotate around the hinge structure in the lock box 1, and the hook part 21 and the pressing part 20 are both facing the opening direction. The lock buckle 2 rotates clockwise (with a rotation direction of 1.1 degrees). Figure 1 For example, when the lock 2 is rotated (looking from top to bottom), the back of the pressing portion 20 can abut against the bottom surface 10 of the box; when the lock buckle 2 is rotated counterclockwise, the back of the hook portion 21 can abut against the right side box wall.

[0034] To ensure that the latch 2 has sufficient strength, stiffness and stability, the latch 2 is preferably made of sheet metal, and the hemming process (hemming means folding the edge of the flat plate back 180 degrees) is used to bend and fold the edges of the hooking portion 21 and the pressing portion 20 to form a chamfer, preventing scratches on the pressing frame 3 and the hooking tongue 4 in the locking tongue assembly 200, and increasing the force-bearing strength of the pressure-receiving surface 201 of the pressing portion 20 and the hooking portion 21, effectively extending the service life of the latch assembly 100 and the locking tongue assembly 200.

[0035] The preferred hinge structures of the present invention are as follows:

[0036] a. Shaft hinge

[0037] Combined with Figure 3 and Figure 4 As shown, the hinge structure mainly includes a fixed shaft 22. When using this hinge structure, two ear plates 24 extending backward are provided on the back surface of the latch 2, and shaft holes 241 are provided on the ear plates 24. The ear plates 24 can be integrally formed with the hooking portion 21 and the pressing portion 20; the top cover of the lock box 1 is provided with an upper hole 11, and the bottom cover is provided with a lower hole 12. The fixed shaft 22 sequentially passes through the upper hole 11, the shaft hole 241 and the lower hole 12. The two ends of the fixed shaft 22 can be directly flattened so that the diameters of the two ends are larger than the upper hole 11 and the lower hole 12, and the latch 2 is fixedly installed in the lock box 1, and the latch 2 can rotate along the fixed shaft 22.

[0038] To prevent the up and down movement of the latch 2 from affecting the stability of the engagement between the lock box 1 assembly and the latch assembly 100, two limit holes 13 are provided at the position of the bottom surface 10 of the lock box 1 relative to the ear plates 24, and the rear ends of the ear plates 24 are inserted into the limit holes 13.

[0039] To prevent the latch 2 from freely rotating in the lock box 1, a torsion spring is also sleeved on the fixed shaft 22. In this embodiment, the torsion spring preferably uses a double torsion spring 23 with high stability. The double torsion spring 23 is sleeved on the fixed shaft 22 and placed between the two ear plates 24. One side of the double torsion spring 23 abuts against the bottom surface 10 of the box, and the other side abuts against the back surface of the pressing portion 20. When the pressing portion 20 is not under pressure, the double torsion spring 23 is in a popped state. At this time, the latch 2 is in the popped position, so that the hooking portion 21 always abuts against the box wall; when the pressure-receiving surface 201 of the pressing portion 20 (the front side of the pressing portion 20 facing forward is the pressure-receiving surface 201) is under pressure, the double torsion spring 23 is compressed, and the latch 2 can rotate along the fixed shaft 22 to the tightened position.

[0040] This shaft hinge structure is simple, has low manufacturing cost, and has high stability in use.

[0041] b. Block hinge

[0042] Combined with Figure 5 and Figure 6As shown, the hinge structure mainly includes an arc-shaped convex block 14 provided on the bottom surface 10 of the lock box 1 and a connecting block 25 provided on the back of the lock catch 2. A groove 251 is provided in the center of the connecting block 25, and the arc-shaped convex block 14 can be embedded and clamped in the groove 251. The lock catch 2 and the lock box 1 are fixedly connected by clamping the arc-shaped convex block 14 and the groove 251, and the lock catch 2 can rotate left and right in the lock box 1.

[0043] At the top and bottom of the connecting block 25, socket columns 15 are further protruded. A double-torsion spring 23 is sleeved on the socket columns 15. One side of the double-torsion spring 23 abuts against the bottom surface 10 of the box, and the other side abuts against the rear of the pressing part 20. When the pressing part 20 is not under pressure, the double-torsion spring 23 is in a popped state. At this time, the lock catch 2 is in the popped position, so that the hooking part 21 always abuts against the box wall. When the pressure receiving surface 201 of the pressing part 20 is under pressure, the double-torsion spring 23 is compressed, and the lock catch 2 can rotate along the fixed shaft 22 to the fastening position.

[0044] This hinge structure is simple, convenient for disassembly and assembly, and the lock catch 2 can be replaced separately.

[0045] 2. Lock tongue assembly 200

[0046] As shown in combination Figures 1 to 4 As shown, the lock tongue assembly 200 mainly consists of a pressing frame 3, a hook tongue 4, a base plate 5 and a rotating handle 6. The lock tongue assembly 200 is embedded and installed on the door and can cooperate with the lock catch assembly 100 on the door frame to lock the door and the door frame (for the lock tongue assembly 200, the direction towards the door frame is the front, and the opposite is the back, the same below).

[0047] As shown in combination Figure 1 and Figure 3 As shown, the rotating handle 6 is divided into a horizontal connecting arm 61 and a vertical connecting arm 62 from top to bottom. The hook tongue 4 is triangular in shape and is arranged at the front end of the horizontal connecting arm 61. The hook tongue 4 can be integrally formed with the horizontal connecting arm 61 and the vertical connecting arm 62. The vertical connecting arm 62 is zigzag, and a button 64 is protruded at its lower end, and a mounting post 63 perpendicular to the base plate 5 is arranged at the middle turning point.

[0048] As shown in combination Figure 3 and Figure 4 As shown, the base plate 5 is a flat plate. A through hole 53 and a pressing plate 52 bent backward are provided on the upper part of the base plate 5, and a mounting hole 51 is provided in the middle. The pressing frame 3 is fixedly connected to the edge of the through hole 53, and the front end surface of the pressing frame 3 is a pressing surface 31. The front end of the horizontal connecting arm 61 can pass through the through hole 53 from the back of the base plate 5 and place the hook tongue 4 in the pressing frame 3 and behind the pressing surface 31.

[0049] As shown in combination Figures 1 to 4As shown, the rotating handle 6 and the base plate 5 are fixedly connected by the socket connection of the mounting post 63 and the mounting hole 51. There are various socket connection methods. For example, an external thread is provided on the mounting post 63, which can pass through the mounting hole 51 and be fixedly connected to a nut, so that the rotating handle 6 is rotatably fixedly connected to the base plate 5 (not shown in the figure). To make the installation more stable, a back plate 8 with a hole post 81 can be provided on the other side of the rotating handle 6. The mounting post 63 on one side of the rotating handle 6 is placed in the mounting hole 51 on the base plate 5, and the mounting post 63 on the other side is placed in the hole post 81 on the back plate 8. The base plate 5 and the back plate 8 are fixedly connected by a nut and stud method, and the rotating handle 6 can rotate between the base plate 5 and the back plate 8 with the mounting post 63 as the axis.

[0050] Combined with Figures 1 to 4 As shown, a spring seat 71 is provided on the same side as the button 64 at the rear of the transverse connecting arm 61. A spring 7 is sleeved on the spring seat 71. One end of the spring 7 abuts against the spring seat 71, and the other end abuts against the abutting plate 52 of the base plate 5. At this time, the spring 7 makes the transverse connecting arm 61 abut against the through hole 53, and the hook tongue 4 is exposed outside the pressing frame 3. When the user presses the button 64, if the pressing force is greater than the spring force, the rotating handle 6 will rotate along the mounting post 63, the spring 7 is compressed by the transverse connecting arm 61, and the hook tongue 4 moves with the transverse connecting arm 61. When the hook tongue 4 is completely hidden in the pressing frame 3, the door is opened (for the detailed working process, see below). To ensure safety in use and prevent the door from being easily opened by pressing the button 64, a spring with a greater elastic force can be used, or an additional spring 7 can be added behind the button 64, as Figure 3 As shown, a spring seat 71 is provided on the back of the button 64, a spring 7 is sleeved on the spring seat, and an abutting plate 52 protrudes from the base plate 5 at the corresponding position of the other end of the spring. When the user presses the button 64, when the pressing force is greater than the elastic forces of the two springs, the hook tongue 4 can be completely placed in the pressing frame 3, and the door can be opened.

[0051] The locking and unlocking process of the lock tongue assembly 200 and the lock buckle assembly 100:

[0052] When the user closes the door, the pressing surface 31 of the pressing frame 3 in the lock tongue assembly 200 applies an inward pressure to the pressed surface 201 of the pressing part 20. The pressing part 20 compresses the double torsion spring 23, and the hooking part 21 rotates towards the pressing part 20 side around the hinge structure. During its rotation, the buckling part 212 of the hooking part 21 squeezes the hook tongue 4 to place it in the pressing frame 3. As the door is further pushed forward, when the lock buckle 2 rotates to the fastening position, the hook tongue 4 crosses the buckling part 212 and inserts into the buckling space under the action of the spring 7. At this time, the hooking part 21 and the hook tongue 4 are engaged and locked, completing the door closing and locking action.

[0053] When the user opens the door, the button 64 is pressed, and the rotating handle 6 rotates about the mounting post 63. The latch tongue 4 follows the transverse connecting arm 61 to rotate. When the latch tongue 4 is completely hidden in the pressing frame 3, the latch tongue 4 is disengaged from the hooking portion 21. The double torsion spring 23 resets and presses the back surface of the pressing portion 20. The pressing portion 20 rotates and pushes out the pressing frame 3. The lock catch 2 rotates to the pop-up position, and the door is pushed open together, completing the unlocking and door-opening action.

[0054] The lock catch assembly 100 and the lock tongue assembly 200 installed on the intelligent cooking machine:

[0055] Combined Figures 7 to 9 As shown, the lock tongue assembly 200 is installed on the cooking machine door 91, and the lock catch assembly 100 is installed on its frame 92. When the door 91 is closed, the latch tongue 4 in the lock tongue assembly 200 engages and locks with the lock catch 2 in the lock catch assembly 100. The lock catch assembly 100 is fixedly connected to the back surface of the frame 92 by welding (not shown in the figure). A fixing plate 93 bent backward is provided on the side of the substrate 5 of the lock tongue assembly 200. Fixing holes are provided on the fixing plate 93, and the lock tongue assembly 200 is fixedly connected to the side of the door 91 by screws and nuts in the fixing holes, so that the lock tongue assembly 200 is fixedly embedded in the door 91. An opening is provided on the door 91 opposite to the button 64 and the pressing frame 3. In order to improve the user experience and the aesthetics of the machine, a pressing sleeve 95 is also provided on the button 64 for the convenience of the user to press. To prevent children in a family from easily reaching the button 64 during operation, the lock catch assembly 100 can be installed at the upper part of the door.

[0056] It can be understood that the lock tongue assembly 200 in the present invention can be embedded and installed on a rotating door or a movable door. The lock tongue assembly 200 can be installed and fixedly embedded in the door from the side or from the front. The fixing holes on the substrate 5 can be set according to the installation situation on the door. The lock catch assembly 100 is installed at a position opposite to the lock tongue assembly 200 on the door frame.

Claims

1. A door lock, comprising a latch assembly that can be installed on a doorframe and a lock tongue assembly that can be installed on a door, characterized in that, The latch assembly includes a lock box and a latch disposed within the lock box. One side of the lock box opposite to the tongue assembly is open. The back surface of the latch is connected to the bottom surface of the lock box through a hinge structure. The latch includes a hooking portion and a pressing portion arranged symmetrically with respect to the hinge structure. The pressing surface of the pressing portion and the buckling portion of the hooking portion face the open side. The tongue assembly includes a pressing frame with a pressing surface and a hook tongue. The hook tongue is hidden behind the pressing surface through an elastic structure. When the pressing frame applies pressure to the pressing surface with the pressing surface, the buckling portion rotates towards the pressing portion around the hinge structure and engages with the hook tongue for locking.

2. The door lock according to claim 1, characterized in that, The hinge structure includes a fixed shaft. At least one ear plate extending backward is provided on the back surface of the latch. A shaft hole is provided on the ear plate. Upper holes and lower holes coaxial with the shaft hole are respectively provided on the top cover and the bottom cover of the lock box. The fixed shaft sequentially passes through the upper hole, the shaft hole, and the lower hole to install the latch within the lock box.

3. The door lock according to claim 2, characterized in that, At least one limiting hole is provided on the bottom surface of the lock box. A part of the ear plate behind the shaft hole is inserted into the limiting hole to limit the latch at a set position in the vertical direction.

4. The door lock according to claim 3, characterized in that, A torsion spring is sleeved on the fixed shaft, which can enable the tongue assembly to quickly bounce the door open when the latch assembly and the tongue assembly are disengaged from the engaged state.

5. The door lock according to claim 1, characterized in that, The hinge structure includes a connecting block provided on the back surface of the latch and an arc-shaped convex block provided on the bottom surface of the box. A groove adapted to the arc-shaped convex block is provided in the center of the connecting block. The arc-shaped convex block can be embedded and clamped in the groove.

6. The door lock according to claim 5, characterized in that, Socket columns are protruded at the top end and the bottom end of the arc-shaped convex block. A torsion spring is sleeved on the socket columns, which can enable the tongue assembly to quickly bounce the door open when the latch assembly and the tongue assembly are disengaged from the engaged state.

7. The door lock according to claim 4 or 6, characterized in that, The tongue assembly further includes a base plate and a rotating handle installed on the door. The rotating handle is divided into a horizontal connecting arm and a vertical connecting arm from top to bottom. The rear end of the horizontal connecting arm passes through the base plate and is connected to the top end of the vertical connecting arm provided on the back surface of the base plate. The hook tongue is provided at the front end of the horizontal connecting arm. An installation column perpendicular to the base plate is protruded in the middle of the vertical connecting arm. A button for facilitating user pressing is provided at the lower part. An installation hole is provided at a position on the back surface of the base plate opposite to the installation column. The installation column is rotatably fixed in the installation hole. The pressing frame is provided on the front surface of the base plate.

8. The door lock according to claim 7, characterized in that, A butting plate bent backward is provided on the base plate. A spring seat for sleeving a spring is provided on the rear part of the horizontal connecting arm on one side of the button. The spring is located between the spring seat and the butting plate.

9. The door lock according to claim 8, characterized in that, The tongue assembly is embedded and installed at the edge of the door, and the button is located at the side of the door.

10. A cooking machine, comprising a machine door and a machine frame, characterized in that, The tongue assembly of the door lock as described in any one of claims 1 to 9 is installed on the doorframe, and a latch assembly adapted to the tongue assembly is installed at a position on the frame opposite to the tongue assembly.

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