Door lock mechanism for cooking equipment

Abstract

The present invention relates to a door lock mechanism of a cooking device, which comprises a shell with a cavity and a front opening, a lock assembly, a micro switch, a linkage rod, a limit rod and a first elastic member, wherein the lock assembly is arranged on the front side of the cavity, and a lock hook of the lock assembly can deflect relative to the front opening of the shell to limit a door lock tongue on a door body within the opening; the door lock tongue and the elastic member act on the linkage rod due to the opening and closing of the door body, so that the linkage rod can slide forward and backward synchronously with the lock hook relative to the shell, thereby making the micro switch in a triggered or non-triggered state, so that some electrical components can be connected while opening or closing the door; the design of the limit rod sliding forward and backward in the shell can limit the deflection of the lock hook to ensure that the door body will not be opened due to misoperation in the working state to cause an accident.

Description

Technical Field

[0001] The invention relates to a door lock mechanism, in particular to a door lock mechanism for cooking equipment. Background Art

[0002] For cooking equipment, the door body not only plays the role of opening or closing the cooking cavity, but also often involves the operation of some circuit components. In existing microwave ovens, the door lock and micro switch are set separately, and the door lock only plays the role of mechanical door lock. Such independent designs need to ensure that the door lock is closed and the micro switch is closed and energized at the same time, which requires the two to have high coordination accuracy.

[0003] To this end, some devices use a door lock mechanism and a micro switch to link together to solve this technical problem, such as the "Universal Microwave Oven Door Interlocking Mechanism" disclosed in the Chinese invention patent with patent number ZL 201020545967.5 (authorization announcement number CN 201925981 U). The interlocking mechanism includes a switch seat, a door hook and a front plate. Multiple switches can be placed on the switch seat, and an action key for operating the switch is provided at the position corresponding to each switch. The door hook is provided on the oven door of the microwave oven and is combined with or disengaged from the switch seat as the oven door is opened or closed. The door hook has at least one hook portion for triggering the switches by touching the action keys, and the front plate is used to fix the switch seat on the cavity of the microwave oven. The door interlock mechanism has a relatively complex structure, and the two hooks used to touch the microswitch action keys are both provided on the door hooks. A recess for the door hooks to extend into is formed on the front plate. If a tiny cylindrical object such as an iron wire is used to press the two recesses at the same time, when the microwave oven is started, the microwave may be accidentally started with the door open, thus posing a safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a door lock mechanism for a cooking device with a simple structure and which is safe and reliable in view of the current status of the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a door lock mechanism of a cooking device, comprising

[0006] The housing has a cavity, and the front side of the housing is provided with an opening for at least part of the door lock tongue to extend into, and the cavity is in communication with the opening;

[0007] A lock catch assembly is arranged at the front side of the cavity and can restrain the door lock tongue in the opening when the door lock tongue extends into the opening. The lock catch assembly has a lock hook for locking the door lock tongue, and the lock hook can deflect relative to the opening and can slide back and forth in the cavity;

[0008] A micro switch, disposed in the cavity, having a spring for triggering a contact;

[0009] Also includes

[0010] The linkage rod at least partially extends into the cavity and can slide synchronously with the lock hook and away from the spring under the drive of the door lock tongue to put the micro switch in a non-triggered state;

[0011] a limiting rod, which is disposed in the housing and can slide forward and backward relative to the housing to approach the lock hook to limit the rotation of the lock hook or move away from the lock hook to form an escape space for the lock hook to deflect; and

[0012] The first elastic member acts on the linkage rod and makes the linkage rod always have a tendency to contact with the spring sheet so that the micro switch is in a triggered state.

[0013] In order to ensure that the micro switch can be switched to the corresponding trigger or non-trigger state at the same time when the door is closed, the linkage rod includes a rod body and a connecting part arranged on the rod body, the connecting part is installed on the lock hook, and the rod body is provided with a trigger part for contacting the spring sheet. When the door lock tongue extends into the opening, the lock hook and the linkage rod slide backward synchronously to make the trigger part away from the spring sheet.

[0014] Specifically, the micro switch is arranged on one of the two sides of the linkage rod, and the trigger portion is a convex column extending from the linkage rod body toward the same side of the micro switch.

[0015] In order to ensure that the linkage rod can move synchronously with the lock hook under the action of the door lock tongue and will not interfere with the lock hook, the connecting part is a boss arranged at the front part of the linkage rod, and a limiting groove is provided at the lower part of the boss for the upper part of the lock hook to be accommodated therein.

[0016] In order to realize the forward and backward sliding of the limiting rod, preferably, a driving rod is further provided in the housing, and a power output end of the driving rod is connected to the limiting rod and can drive the limiting rod to approach the locking hook or move away from the locking hook.

[0017] In order to facilitate the disassembly of the shell, the shell includes a first shell and a second shell that are plug-connected, the accommodating cavity is arranged in the first shell, and the second shell is provided with a first slide track and a second slide track arranged side by side, the limit rod is slidably arranged in the first slide track, and the linkage rod is slidably arranged in the second slide track.

[0018] In order to ensure that the movement speed of the limiting rod will not be too fast, a damping member for limiting the sliding speed of the limiting rod is arranged at the rear of the first slideway.

[0019] In order to ensure that the linkage rod and the limit rod do not deviate when sliding, guide columns for facilitating sliding are arranged in the first slideway and the second slideway. Correspondingly, guide grooves matching their corresponding guide columns are arranged on the limit rod and the linkage rod.

[0020] In order to enable the lock hook to recover after deflection, the lock assembly also includes a second elastic member, one end of which is connected to the inner wall of the shell, and the other end is connected to the lock hook and always has a tendency to prevent the lock hook from deflecting.

[0021] In order to achieve the deflection of the lock hook and hook the door lock tongue after deflection, a groove matching the door lock tongue is provided on the lock hook. The lock hook can be deflected relative to the opening through a rotating shaft arranged in the cavity, and a yield groove matching the rotating shaft is correspondingly provided on the lock hook.

[0022] Compared with the prior art, the advantages of the present invention are: in the door lock mechanism of the cooking equipment, the lock hook of the lock assembly can be deflected relative to the front opening of the shell, and the door lock tongue on the door body is limited in the opening, and the door lock tongue and the elastic member act on the linkage rod due to the opening and closing of the door body, so that the linkage rod can slide back and forth synchronously with the lock hook relative to the shell, and then the micro switch is in a triggered or non-triggered state, so that some electrical components can be connected when the door is opened or closed; the design of the limit rod sliding back and forth in the shell can limit the deflection of the lock hook, so as to ensure that the door body will not be opened due to misoperation in the working state to cause an accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the door lock mechanism in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the overall structure after omitting part of the shell;

[0025] Figure 3 It is a schematic diagram of the overall structure decomposition of the door lock mechanism in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of the overall structure breakdown from another angle;

[0027] Figure 5 The schematic diagram of the structure of the rear housing is to omit the linkage rod and the limit rod;

[0028] Figure 6 It is a schematic diagram of the assembly of the linkage rod and the housing;

[0029] Figure 7 It is a schematic diagram of the assembly of the limit rod and the housing. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 7As shown, it is a preferred embodiment of the present invention. In this embodiment, the door lock mechanism of the cooking device includes a shell 1, a lock assembly 2, a micro switch 3, a linkage rod 4, a limit rod 5 and a first elastic member 6. The shell 1 has a cavity 1a, and an opening 1b is provided on the front side of the shell 1. The cavity 1a is connected with the opening 1b. Generally speaking, a door lock tongue 100 that can at least partially extend into the opening 1b is provided on the door body. After the door lock tongue 100 extends into the opening 1b, the lock assembly 2 can constrain the door lock tongue 100 in the opening 1b, so that the door body is in a closed state; specifically, the lock assembly 2 includes a lock hook 21 and a second elastic member 22. The function of the lock hook 21 is to constrain the door lock tongue 100 in the opening. A groove 211 matching the door lock tongue 100 is provided on the lock hook 21. In order to facilitate the notch on the door lock tongue 100 to be engaged with the groove 211, the lock assembly 2 includes a lock hook 21 and a second elastic member 22. The lock hook 21 is configured to be deflected relative to the opening 1b. Specifically, the lock hook 21 can be deflected relative to the opening 1b by the rotating shaft 1c arranged in the cavity 1a. The lock hook 21 is provided with a correspondingly arranged clearance groove 1d matching the rotating shaft 1c. In this way, the deflection design of the lock hook 21 can ensure that the notch on the door lock tongue 100 can be conveniently engaged in the groove 211, so as to realize the connection between the lock hook 21 and the door lock tongue 100. In order to prevent the two from being separated after being connected, one end of the second elastic member 22 is connected to the inner wall of the housing 1, and the other end is connected to the lock hook 21 and always has a tendency to prevent the lock hook 21 from deflecting. In this way, the existence of the second elastic member 22 can restore the lock hook 21 to its original position after deflection. The second elastic member 22 in this embodiment is a tension spring.

[0032] In this embodiment, the above-mentioned microswitch 3 is arranged in the cavity 1a, and the microswitch 3 has a spring piece 31 for triggering the contact. The cooperation of the above-mentioned linkage rod 4 and the first elastic member 6 can make the microswitch 3 in a triggered or non-triggered state while the door body is opened and closed, wherein the linkage rod 4 at least partially extends into the cavity 1a, and can slide synchronously with the lock hook 21 under the drive of the door lock tongue 100 and away from the spring piece 31 to put the microswitch 3 in a non-triggered state; and the first elastic member 6 acts on the linkage rod 4 and makes the linkage rod 4 always have a tendency to contact the spring piece 31 to put the microswitch 3 in a triggered state. Specifically, the above-mentioned linkage rod 4 includes a rod body 41 and a connecting portion 42 arranged on the rod body 41, and the connecting portion 42 is installed on the lock hook 21. The connecting portion 42 in this embodiment is a boss arranged at the front part of the linkage rod 4, and a limiting groove 42a is provided at the lower part of the boss for the upper part of the lock hook 21 to be accommodated therein, and a triggering portion 411 for contacting the spring piece 31 is provided on the rod body 41. When the door lock tongue 100 is extended into the opening 1b, the door lock tongue 100 can be against the lock hook 21 and the front part of the linkage rod 4, and the lock hook 21 and the linkage rod 4 slide backward synchronously to make the triggering portion 411 away from the spring piece 31. The above-mentioned micro switch 3 is arranged on one of the two sides of the linkage rod 4, and the triggering portion 411 is a convex column extending from the rod body 41 of the linkage rod 4 toward the same side of the micro switch 3.

[0033] In this embodiment, the above-mentioned limit rod 5 is arranged in the shell body 1 and can slide forward and backward relative to the shell body 1 to approach the lock hook 21 and limit the rotation of the lock hook 21 or move away from the lock hook 21 to form an avoidance space for the lock hook 21 to deflect, and a driving rod 7 is also arranged in the shell body 1. The power output end of the driving rod 7 is connected to the limit rod 5 and can drive the limit rod 5 to approach the lock hook 21 or move away from the lock hook 21. When the driving rod 7 drives the limit rod 5 to approach the lock hook 21, the space required for the rotation of the lock hook 21 will be occupied. Therefore, when the door body is in a closed state, it is only necessary to limit the deflection of the lock hook to ensure that the door body will not be opened due to misoperation, thereby causing an accident.

[0034] The above-mentioned shell 1 includes a first shell 11 and a second shell 12 that are plug-connected, the cavity 1a is arranged in the first shell 11, and the second shell 12 is provided with a first slide 121 and a second slide 122 arranged side by side, the limit rod 5 is slidably arranged in the first slide 121, and the linkage rod 4 is slidably arranged in the second slide 122, and a damping member 8 for limiting the sliding speed of the limit rod 5 is arranged at the rear part of the first slide 121, and guide columns 123 for facilitating sliding are arranged in the first slide 121 and the second slide 122. Correspondingly, the limit rod 5 and the linkage rod 4 are provided with guide grooves 124 that match their respective corresponding guide columns 123.

[0035] The working process of the present invention is as follows: when the door body is closed, the door lock tongue 100 on the door body extends into the opening 1b, and the door lock tongue 100 first abuts against the wall surface of the lock hook 21 adjacent to the opening 1b. Since the lock hook 21 is connected to the cavity 1a through the rotating shaft 1c, the abutment of the door lock tongue 100 will cause the lock hook 21 to deflect, and the groove 211 on the lock hook 21 is clamped with the notch on the door lock tongue 100; then the lock hook 21 is restored to the state before the deflection under the action of the second elastic member 22, i.e., the tension spring, and the door lock tongue 100 continues to extend to the wall surface adjacent to the linkage rod 4. The rear wall surface of the groove 211 of the lock hook 21 abuts against each other, thereby driving the linkage rod 4 and the lock hook 21 to slide backward synchronously. At this time, because the linkage rod 4 moves backward, the triggering part 411 of the linkage rod 4 is away from the spring 31, so that the micro switch 3 is in a triggered state and the circuit where the relevant electrical components are located is connected, so that some functions are turned on. Then the driving rod 7 drives the limiting rod 5 to approach the lock hook 21 and limit the deflection of the lock hook 21, so that the door lock tongue 100 does not have enough space to escape from the groove 211, and the door body cannot be opened, thereby ensuring safety during use.

Claims

1. A door lock mechanism for a cooking device, comprising A housing (1) having a cavity (1a), and an opening (1b) for at least part of the door lock tongue (100) to extend into is provided on the front side of the housing (1), and the cavity (1a) is communicated with the opening (1b); A lock catch assembly (2) is arranged at the front side of the cavity (1a) and can restrain the door lock tongue (100) in the opening (1b) when the door lock tongue (100) extends into the opening (1b). The lock catch assembly (2) has a lock hook (21) for locking the door lock tongue (100). The lock hook (21) can deflect relative to the opening (1b) and can slide back and forth in the cavity (1a); A micro switch (3) is disposed in the cavity (1a) and has a spring (31) for triggering a contact; It is characterized in that Also includes The linkage rod (4) at least partially extends into the cavity (1a) and can slide synchronously with the lock hook (21) and away from the spring sheet (31) under the drive of the door lock tongue (100) to put the micro switch (3) in a non-triggered state; a limiting rod (5) disposed in the housing (1) and capable of sliding forward and backward relative to the housing (1) to approach the locking hook (21) to limit the rotation of the locking hook (21) or to move away from the locking hook (21) to form an escape space for the locking hook (21) to deflect; and The first elastic member (6) acts on the linkage rod (4) and makes the linkage rod (4) always have a tendency to contact with the spring sheet (31) so that the micro switch (3) is in a triggered state. The linkage rod (4) comprises a rod body (41) and a connecting portion (42) provided on the rod body (41). The connecting portion (42) is mounted on the lock hook (21). The rod body (41) is provided with a triggering portion (411) for contacting with the spring sheet (31). When the door lock tongue (100) extends into the opening (1b), the lock hook (21) and the linkage rod (4) are in a state of contacting with the spring sheet (31). The movable rod (4) slides backward synchronously to move the trigger portion (411) away from the spring sheet (31). A driving rod (7) is also arranged in the housing (1). The power output end of the driving rod (7) is connected to the limiting rod (5) and can drive the limiting rod (5) to approach the lock hook (21) or to move away from the lock hook (21). The lock assembly (2) also includes a second elastic member (22). One end of the second elastic member (22) is connected to the inner wall of the housing (1), and the other end is connected to the lock hook (21) and always has a tendency to prevent the lock hook (21) from deflecting.

2. The door lock mechanism according to claim 1, characterized in that: The micro switch (3) is arranged on one of the two sides of the linkage rod (4), and the trigger portion (411) is a convex column extending from the rod body (41) of the linkage rod (4) toward the same side of the micro switch (3).

3. The door lock mechanism according to claim 2, characterized in that: The connecting portion (42) is a boss arranged at the front of the linkage rod (4), and a limiting groove (42a) is provided at the lower part of the boss for accommodating the upper part of the locking hook (21).

4. The door lock mechanism according to claim 1, characterized in that: The shell (1) comprises a first shell (11) and a second shell (12) which are plug-connected, the cavity (1a) is arranged in the first shell (11), the second shell (12) is provided with a first slideway (121) and a second slideway (122) which are arranged side by side, the limit rod (5) is slidably arranged in the first slideway (121), and the linkage rod (4) is slidably arranged in the second slideway (122).

5. The door lock mechanism according to claim 4, characterized in that: A damping member (8) for limiting the sliding speed of the limiting rod (5) is arranged at the rear of the first slideway (121).

6. The door lock mechanism according to claim 5, characterized in that: The first slideway (121) and the second slideway (122) are both provided with guide columns (123) for facilitating sliding. Correspondingly, the limit rod (5) and the linkage rod (4) are both provided with guide grooves (124) matching the corresponding guide columns (123).

7. The door lock mechanism according to claim 1, characterized in that: The lock hook (21) is provided with a groove (211) matching with the door lock tongue (100); the lock hook (21) can be deflected relative to the opening (1b) through a rotating shaft (1c) arranged in the cavity (1a); and the lock hook (21) is correspondingly provided with a clearance groove (1d) matching with the rotating shaft (1c).

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