WO2014056203A1

WO2014056203A1 - Door body interlock switch and microwave cooking device utilizing the door body interlock switch

Info

Publication number: WO2014056203A1
Application number: PCT/CN2012/082888
Authority: WO
Inventors: 孙小兵; 涂明洪
Original assignee: 美的集团股份有限公司; 广东美的微波电器制造有限公司
Priority date: 2012-10-12
Filing date: 2012-10-12
Publication date: 2014-04-17
Also published as: CN104812981A; CN104812981B; JP6068656B2; JP2016500802A

Abstract

A microwave cooking device and a door body interlock switch of the microwave cooking device. The interlock switch comprises a door hanger (1) arranged on a door body (100), an interlock component (2) and at least one inching switch (3) arranged on a front door plate (200). The interlock component comprises a bracket (21), a cam (22) that is arranged on the bracket (21) and can rotate relative to the bracket (21) and an elastic member (23) used to reset the cam (22) on the bracket (21). The door hanger (1) is provided with a positioning plate (11) and a hanging hole (10). The cam (22) is provided with a lock hook (220) that can be buckled with the door hanger (1) and hanging hole (10). The inching switch (3) is fixed on both sides of the bracket (21). The cam (22) is provided with a structure that abuts against a trigger button (30). The microwave cooking device utilizes the interlock switch. A distance between the door body (100) and the front door plate (200) of the microwave cooking device and the door body interlock switch of the microwave cooking device can be controlled, preventing microwave leakage, steam leakage and sparking caused by an extremely short distance between the door body (100) and the front door plate (200), and ensuring a high safety.

Description

Door interlock switch and microwave cooking device using the same

Technical field

The invention belongs to the technical field of microwave cooking equipment production, and more particularly to a microwave cooking equipment door interlock switch and a microwave cooking device.

Background technique

Existing door locks for microwave cooking equipment such as microwave ovens, microwave ovens, microwave steam ovens, etc. generally employ a door hinge structure, which typically includes a door seal and its raised portion, an interlocking bracket, an interlocking lever, and an interlocking spring. The structural defect is: if the tension of the door hinge system is insufficient, the hinge system is assembled and unqualified, and the wear is weak after long-term use, the gap between the front plate and the door body is unstable, resulting in microwave leakage, steam leakage, front plate and door. There is a phenomenon of sparking between the bodies; the reason is that there is no proper tension between the front plate and the door body at a suitable position, and the gap between the door body and the front plate is large and the gap is not controlled.

technical problem

The technical problem to be solved by the present invention is to provide a door interlocking switch for a microwave cooking device, which aims to solve the problem that the gap between the front plate and the door body is unstable, resulting in microwave leakage, steam leakage and appearance between the front plate and the door body. The problem of fire phenomenon.

Technical solution

In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a door interlocking switch for a microwave cooking device, which is used for locking between a door body and a front panel of a door, and includes a door provided on the door body. An interlocking component disposed on the front panel of the door and at least one microswitch, the interlocking component comprising a bracket, a cam disposed on the bracket and rotatable relative to the bracket, for An elastic member for resetting the cam on the bracket, the door is provided with a positioning plate and a hanging hole, and the cam is provided with a locking hook that can be coupled with the hanging hole of the door hanging, the micro switch A trigger button is disposed on the two sides of the bracket, and a fixed structure for mounting the micro switch is disposed on the two sides of the bracket, and the cam is provided with a convex portion and an arc-shaped touch portion that can abut against the trigger button of the micro switch .

Further, a circular shaft is protruded from one side of the bracket, and the cam is provided with a sleeve sleeve that can be sleeved on the circular shaft, and the cam passes through the sleeve and the circular shaft and the bracket Turn the connection.

Further, a position of the circular shaft of the bracket near the end surface thereof is provided with a retaining protrusion, and a groove of the cam sleeve is disposed on the inner side of the sleeve, and the sleeve is sleeved on the sleeve. The circular shaft is on the outer side of the sleeve.

Further, the cam is provided with a top plate which can be topped with the front end of the hanging plate of the door, and an open groove is formed between the top plate and the hook, the bracket has a front end The front end plate is provided with a "T" shaped hole, and the locking hook and the top plate of the cam are disposed opposite to the "T" shaped hole.

Further, the bracket is further provided with an arc-shaped hole, and the arc-shaped touch portion is disposed in the arc-shaped hole.

Specifically, the fixing structure includes two pin shafts and two clips laterally protruding from the bracket, and each of the micro switches is respectively provided with two shaft holes that are matched with the pin shafts. The micro switch is sleeved on the pin shaft through the shaft hole, and the clip is fastened on both sides of the micro switch.

Further, the elastic member is a torsion spring, the bracket is provided with a first connecting hole, and the cam is provided with a second connecting hole, and one end of the torsion spring is inserted into the first connecting hole, and the other One end is inserted into the second connection hole.

The utility model provides the microwave cooking device door interlock switch which has the beneficial effects that: the door hanging on the door body cooperates with the locking hook on the cam in the interlocking component disposed on the rear side of the door front panel, and the door is hung The size is fixed. When the door is closed, the door hangs to the cam and rotates the cam to a certain angle. The door hangs and the hook are interlocked. Under the action of the elastic member, the cam pulls the door toward the front panel. Hanging, the door body is tightened; at this time, the positioning plate hanging on the door abuts against the front panel of the door, preventing the door body from continuing to approach the front panel of the door, so that the distance between the front panel and the door body is controlled at 0.3~ 3mm Left and right, this distance can effectively prevent microwave leakage and steam leakage, and also prevent sparking between the door body and the front panel due to too close distance.

Another technical problem to be solved by the present invention is to provide a microwave cooking apparatus including a door body and a front door panel, and the door body and the door front panel are locked and controlled by a door interlocking system, and the door lock is connected The lock system includes at least two of the door interlock switches described above.

Specifically, the door interlock switch is two, one of the door interlock switches is provided with two micro switches, and the other door interlock switch is provided with a micro switch. Among the three micro switches, any two of them are normally open micro switches, and the other is a normally closed micro switch; when the door is opened, the convex portion or the curved touch portion of the cam is in the Under the action of the torsion spring, the trigger button of each micro switch is not in contact, the two normally open micro switches are in an open state, and the normally closed micro switch is in a closed state. At this time, the whole system is in a power off state, the microwave The cooking device does not work; when the door body is closed, the door hangs against the cam, and the trigger button of each micro switch is touched, wherein the trigger button of the normally closed micro switch is first touched, so that The closed micro switch is turned on, and the two normally open micro switches are turned off, and the microwave cooking device is in the standby state at this time.

Or, specifically, the door interlock switch is two, and each of the door interlock switches is respectively provided with two micro switches, one of which is a normally closed micro switch and the other is a normally open micro switch a switch; when the door body is opened, the convex portion or the curved touch portion of the cam is not in contact with each of the micro switches under the action of the torsion spring, and the two normally open micro switches are open The two normally closed micro switches are in a closed state. At this time, the whole system is in a power off state, and the microwave cooking device does not work; when the door body is closed, the door is hung against the top cam, and each of the micro The trigger button of the movable switch is touched, wherein the trigger button of the normally closed micro switch is first touched, so that the two normally closed micro switches are turned on, and the two normally open micro switches are turned off, and the microwave cooking device is in the standby state at this time.

Beneficial effect

The microwave cooking device provided by the invention has the beneficial effects that: the microwave cooking device of the invention adopts the door interlock switch described above, and the distance between the door body and the front panel is controllable, even if the door hinge system appears When the size is unqualified and worn, the distance between the door body and the front panel of the door can be effectively controlled to about 0.3~3mm, which avoids the phenomenon that the distance between the door body and the front panel is out of control due to the problem of the door hinge system. The utility model effectively solves the problems that the door body and the front panel of the door are too close to each other, the ignition of the door body and the front door of the door body and the front door are too large, resulting in microwave leakage and steam leakage, and the microwave device is also solved. Control problems with electrical systems.

DRAWINGS

1 is a schematic exploded view of a first embodiment of a door interlocking system for a microwave cooking device according to an embodiment of the present invention;

2 is a schematic exploded view of a door interlock switch of a microwave cooking device according to an embodiment of the present invention;

3 is a schematic diagram 1 of an explosion structure of a door interlock switch of a microwave cooking device according to an embodiment of the present invention;

4 is a second schematic diagram of an explosion structure of a door interlock switch of a microwave cooking device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a three-dimensional structure of a door hanging used in a door interlock switch of a microwave cooking device according to an embodiment of the present invention; FIG.

6 is a schematic perspective view of a three-dimensional structure of a bracket used for a door interlock switch of a microwave cooking device according to an embodiment of the present invention;

FIG. 7 is a second perspective structural view of a bracket used for a door interlock switch of a microwave cooking device according to an embodiment of the present invention; FIG.

8 is a schematic perspective view of a three-dimensional structure of a cam used in a door interlocking switch of a microwave cooking device according to an embodiment of the present invention;

FIG. 9 is a second perspective structural view of a cam used in a door interlock switch of a microwave cooking device according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic front view of a door interlock switch of a microwave cooking device according to an embodiment of the present invention;

11 is a schematic diagram showing the reverse structure of a door interlocking switch of a microwave cooking device when it is opened according to an embodiment of the present invention;

12 is a schematic front view showing the structure of a door interlock switch of a microwave cooking device when it is closed according to an embodiment of the present invention;

13 is a schematic diagram showing the reverse structure of a door interlock switch of a microwave cooking device when it is closed according to an embodiment of the present invention;

14 is a schematic exploded view of a second embodiment of a door interlocking system for a microwave cooking device according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a micro switch according to an embodiment of the present invention.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1 to FIG. 6 and FIG. 15, the door interlock switch of the microwave cooking apparatus provided by the present invention will now be described. The microwave cooking device door interlock switch is used for locking between the door body 100 and the door front panel 200. The interlock switch includes a door hanger 1 disposed on the door body 100 and a joint disposed on the front door panel 200. The lock assembly 2 and the at least one micro switch 3, the interlock assembly 2 includes a bracket 21, a cam 22 disposed on the bracket 21 and rotatable relative to the bracket 21, and an elastic member 23 for resetting the cam 22 on the bracket 21, The door hanger 1 is provided with a positioning plate 11 and a hanging hole 10. The cam 22 is provided with a locking hook 220 that can be connected with the hanging hole 10 of the door hanging 1. The micro switch 3 is provided with a trigger button 30, and both sides of the bracket 21 A fixing structure 210 is provided, and the micro-switches 3 are respectively mounted on the bracket 21 through the fixing structure 210. The cam 22 is provided with a boss portion for abutting against the trigger button 30 of the micro switch 3. 224 and the arc-shaped touch portion 225, when the door body 100 is closed, the micro-switch 3 can be controlled to control the working state of the microwave cooking device through a specific structural design.

The door interlocking switch of the microwave cooking device provided by the present invention cooperates with the locking hook 220 on the cam 22 of the interlocking assembly 2 provided on the rear side of the door front panel 200 through the door hanger 1 provided on the door body 100, the door The size of the hanging 1 is fixed. When the door body 100 is closed, the front end of the door hanger 1 is turned toward the cam 22 and rotated, the cam 22 is turned to a certain angle, and the door hanger 1 is fastened to the locking hook 220, and the elastic member 23 is Under the action, the cam 22 pulls the door hanger 1 toward the door front panel 200, so that the door body 100 is tightened; at this time, the positioning plate 11 on the door hanger 1 abuts against the door front panel 200, preventing the door body 100 from continuing to The door front panel 200 is close to each other such that the distance between the door front panel 200 and the door body 100 is controlled to be about 0.3 to 3 mm, which is effective for preventing microwave leakage and steam leakage, and also prevents the door body 100 from being separated from the door front panel 200. The fire was caused by the distance being too close.

Further, please refer to FIG. 6 to FIG. 9 as a specific implementation manner of the door interlocking switch of the microwave cooking device provided by the present invention. The bracket 21 has a round shaft 211 protruding from one side thereof, and the cam 22 is provided with a The sleeve 221 is sleeved on the circular shaft 211, and the cam 22 is rotatably connected to the bracket 21 through the sleeve 221 and the circular shaft 211. Thus, when the front end of the door hanger 1 abuts against the top cam 22, the cam 22 can be rotated about the circular shaft 211 with respect to the bracket 21, and under the action of the elastic member 23, the cam 22 will be directed toward the front door 200. Pulling the door hanger 1 causes the door body 100 to be automatically tightened, and the distance between the door front panel 200 and the door body 100 is controlled to be about 0.3 to 3 mm.

Further, referring to FIG. 7 to FIG. 10, as a specific implementation manner of the door interlocking switch of the microwave cooking device provided by the present invention, the round shaft 211 of the bracket 21 is provided with a retaining prevention block 2111 near the end surface thereof. The inner side of the sleeve 221 of the cam 21 is provided with a groove 2211 for allowing the anti-drop projection 2111 to pass. When the projection 2111 is aligned with the groove 2211, the cam 22 is pushed toward the bracket 21, and the sleeve 221 is set. When the circular shaft 211 is rotated, a certain angle is rotated, so that the protrusion 2111 is located outside the sleeve 221, so that the cam 22 can be prevented from slipping off the circular shaft 211 of the bracket 21, and the structure is simple and reliable, and no other fixing parts are needed. Easy to install.

Further, referring to FIG. 1 , FIG. 5 to FIG. 8 , and FIG. 10 to FIG. 13 , as one embodiment of the door interlocking switch of the microwave cooking device provided by the present invention, the cam 22 is provided with a hook that can be hung with the door 1 . An abutting plate 223 is formed at the front end of the orifice plate 12, and an opening groove 203 is formed between the abutting plate 223 and the locking hook 220. The bracket 21 has a front end plate 213, and the bracket 21 is fixed to the rear side of the front door panel 200 through the front end plate 213. The front end plate 213 is provided with a "T" shaped hole 2130. The locking hook 220 of the cam 22 and the top rest plate 223 are disposed opposite to the "T" shaped hole 2130. The front end of the door hanger 1 can pass through the "T" shaped hole 2130 and The quasi-opening groove 20 abuts against the top plate 223, so that the cam 22 rotates relative to the bracket 2, and the locking hook 220 is buckled from the lower side through the hanging hole 10, and the door body is acted upon by the elastic member 23. The 100 is pulled toward the front door panel 200 and locked.

Further, referring to FIG. 6 and FIG. 13 , as a specific implementation manner of the door interlocking switch of the microwave cooking device provided by the present invention, the bracket 21 is further provided with an arcuate hole 214, and the arc-shaped touch portion 225 is disposed in the arc. In the shape of the hole 214, when the cam 22 rotates, the convex portion 224 and the curved contact portion 225 can simultaneously activate the trigger button 31 mounted on the micro switch 3 on both sides of the bracket 21, and the structure is ingenious.

Further, referring to FIG. 6 , FIG. 7 and FIG. 10 to FIG. 13 , as one embodiment of the door interlocking switch of the microwave cooking device provided by the present invention, each fixing structure includes two laterally protruding protrusions on the bracket 21 . The pin 215 and the two clips 216 are respectively provided with two shaft holes corresponding to the pin shafts 215, and the micro switch 215 is sleeved on the pin shaft 215 through the shaft hole, and the pinch 216 buckles Close to both sides of the micro switch 3. The fixing structure and the fixing manner make the micro switch 3 easy to install and disassemble, and the connection is reliable after fixing, and the assembly position is accurate.

Further, please refer to FIG. 1 to FIG. 4, FIG. 6, FIG. 7, FIG. 9, FIG. 12, as a specific embodiment of the door interlocking switch of the microwave cooking apparatus provided by the present invention, the elastic member 23 is a torsion spring, the bracket 21 is provided with a first connecting hole 212, and the cam 22 is provided with a second connection. The hole 222 has one end of the torsion spring interposed with the first connecting hole 212 and the other end of which is inserted into the second connecting hole 222. Thus, the torsion spring generates a certain tension between the bracket 21 and the cam 22 to reset the cam 22; for ease of installation, the first connecting hole 212 can be set larger, such as triangular, quadrangular or other shapes. hole.

Further, referring to FIG. 8, as one embodiment of the door interlocking switch of the microwave cooking apparatus provided by the present invention, the end of the locking hook 220 has a cylindrical surface structure. The cylindrical surface makes it easy for the locking hook 220 to be hung in the hanging hole 10 of the opening 1 when the door is closed, and it is easy to be released from the hanging hole 10 when the door is opened, and jamming does not occur.

The invention also provides a microwave cooking apparatus. Referring to FIGS. 1 and 14, the microwave cooking apparatus includes a door body 100 and a door front panel 200. The door body 100 and the door front panel 200 are locked by a door interlocking system, and the door lock interlocking system includes at least two of the above doors. Body interlock switch. Of course, one door interlock switch can be correspondingly installed with two micro switches 3, and the door interlock switch is not limited to two, and may be three or more, and the micro switch 3 is not limited to three, and may be four. And above.

Embodiment 1: Please refer to FIG. 1 , the door interlock switch is two, one of the door interlocking switches is provided with two micro switches 3, and the other door interlocking switch is provided with a micro switch 3 Among the three micro switches 3, any two of them are normally open micro switches, and the other is a normally closed micro switch; when the door 100 is opened, the convex portion 224 or the curved touch portion 225 of the cam 22 is Under the action of the torsion spring, the trigger button 30 of each micro switch 3 is not in contact, the two normally open micro switches are in an open state, and the normally closed micro switch is in a closed state. At this time, the entire system is in a power off state, microwave cooking The device does not work; when the door body 100 is closed, the door hanger 1 abuts the top cam 22, and the trigger button 30 of each micro switch 3 is touched, wherein the trigger button of the normally closed micro switch is first touched, so that the normally closed micro switch Open, and the two normally open microswitches are turned off, and the microwave cooking device is in standby state at this time.

Embodiment 2: Please refer to FIG. 14 , the door interlock switch is two. Different from the first solution, each door interlock switch is provided with two micro switches 3 , one of which is a normally closed micro switch. The other is a normally open micro switch; that is, the two micro switches include a total of four micro switches, and any two micro switches 3 can be selected as normally open switches, and the other two micro switches 3 are set to be Closing switch; when the door body 100 is opened, the convex portion 224 or the curved touch portion 225 of the cam 22 is not in contact with the micro-switches 3 under the action of the torsion spring, and the two normally-open micro-switches are in an open state, two The normally closed micro switch is in a closed state. At this time, the whole system is in a power off state, and the microwave cooking device does not work; when the door body 100 is closed, the door hanger 1 abuts the top cam 22, and the trigger button of each micro switch 3 is The triggering button 30 of the normally closed micro switch is first touched, so that the two normally closed micro switches are turned on, and the two normally open micro switches are turned off, and the microwave cooking device is in the standby state at this time.

The microwave cooking device provided by the invention adopts the above-mentioned door interlocking system, and the distance between the door body 100 and the door front panel 200 is controllable, even if the door hinge system is unqualified and worn, the door body The distance between the 100 and the front panel 200 can be well controlled to about 0.3 to 3 mm, which avoids the problem that the distance between the door 100 and the front panel 200 is out of control due to the problem of the door hinge system, and the problem is effectively solved. Because the door body 100 and the front door panel 200 are too close to each other, the ignition of the door body 100 and the upper door of the door front panel 200 are too large, resulting in microwave leakage, steam leakage, etc., and is also well solved. Control problems in the electrical system of microwave equipment.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A door interlocking switch for locking between a door body and a front panel of a door, comprising: a door hanging on the door body; and an interlocking component disposed on the front panel of the door And at least one microswitch, the interlocking assembly including a bracket, a cam disposed on the bracket and rotatable relative to the bracket, and an elastic member for resetting the cam on the bracket, The door is provided with a positioning plate and a hanging hole, and the cam is provided with a locking hook for engaging with the hanging hole of the door hanging. The micro switch is provided with a trigger button, and the bracket is provided with two sides. The fixing structure of the micro switch is provided with a convex portion and an arc-shaped engaging portion for abutting against a trigger button of the micro switch.
The door interlock switch according to claim 1, wherein a circular shaft is protruded from a side of the bracket, and the cam includes a sleeve sleeved on the circular shaft, and the cam passes through the sleeve. The sleeve and the circular shaft are in rotational connection with the bracket.
The door interlock switch according to claim 2, wherein a position of the circular shaft of the bracket near the end surface thereof is provided with a retaining projection, and the inner side of the sleeve of the cam is provided with the anti-dropping convex a groove through which the block passes, the sleeve is sleeved on the round shaft and the protrusion is located outside the sleeve.
The door interlock switch according to claim 1, wherein said cam is provided with a top plate which can be topped with a front end of said hanging hole of said door, said top plate and said lock An open slot is formed between the hooks, the bracket has a front end plate, and the front end plate is provided with a "T" shaped hole, and the locking hook and the top plate of the cam are disposed opposite to the "T" shaped hole.
The door interlock switch according to claim 1, wherein the bracket is further provided with an arc-shaped hole, and the arc-shaped touch portion is disposed in the arc-shaped hole.
The door interlock switch according to claim 1, wherein the fixing structure comprises two pins and two clips laterally protruding from the bracket, and each of the micro switches is separately provided. There are two shaft holes which are matched with the pin shaft, and the micro switch is sleeved on the pin shaft through the shaft hole, and the clips are fastened on both sides of the micro switch.
The door interlock switch according to any one of claims 1 to 6, wherein the elastic member is a torsion spring, the bracket is provided with a first connecting hole, and the cam is provided with a second connection. a hole, one end of the torsion spring is inserted into the first connection hole, and the other end is inserted into the second connection hole.
A microwave cooking apparatus comprising a door body and a front door panel, wherein the door body and the door front panel are locked and controlled by a door interlocking system, the door lock interlocking system comprising at least one of the above Door interlock switch.
A microwave cooking apparatus according to claim 8, wherein said door interlock switch is two, and one of said door interlock switches is provided with two micro switches, and the other of said door bodies The interlock switch is provided with a micro switch, wherein any two of the three micro switches are normally open micro switches, and the other is a normally closed micro switch; when the door is opened, the The convex portion or the curved touch portion of the cam is not in contact with the trigger button of each of the micro switch under the action of the torsion spring, the two normally open micro switches are in an open state, and the normally closed micro switch is in a closed state. At this time, the entire system is in a power-off state, and the microwave cooking device does not work; when the door body is closed, the door is hung against the top cam, and the trigger button of each of the micro-switches is activated, wherein the normally closed The trigger button of the micro switch is first touched, so that the normally closed micro switch is turned on, and the two normally open micro switches are turned off, and the microwave cooking device is in the standby state at this time.
The microwave cooking apparatus according to claim 8, wherein the door interlock switch is two, and each of the door interlock switches is respectively provided with two micro switches, one of which is a normally closed micro a movable switch, the other is a normally open micro switch; when the door body is opened, the convex portion or the curved touch portion of the cam is not in contact with each of the micro switches under the action of the torsion spring, The two normally open micro switches are in an open state, and the two normally closed micro switches are in a closed state. At this time, the entire system is in a power off state, and the microwave cooking device does not work; when the door body is closed, the door is hung Abutting the cam, the trigger button of each of the micro switch is activated, wherein the trigger button of the normally closed micro switch is first touched, so that the two normally closed micro switches are turned on, and the two normally open micro switches are turned off. The microwave cooking device is in a standby state at this time.