JP6068656B2 - Door interlock switch - Google Patents

Description

  The present invention belongs to the production technology field of microwave cooking devices, and more specifically, relates to a door interlock switch and a microwave cooking device of a microwave cooking device.

  A conventional microwave cooking apparatus, for example, a door lock of a microwave oven, a microwave oven, a microwave steam oven, or the like, usually has a door hinge structure including a door seal and its protrusion, an interlock bracket, an interlock lever, and an interlock spring. It is common to adopt. However, if this structure has insufficient pulling force on the door hinge system, the hinge system is not assembled or sized correctly, wear after prolonged use, and an unstable gap between the front panel and the door. There are defects such as microwave leaks, steam leaks, and sparks that occur between the front panel and the door. This is because the front panel and the door are not fixed with an appropriate tensile force at an appropriate position, the gap between the door and the front panel is large, and the gap is not controlled.

  The technical problem to be solved by the present invention is the problem of the unstable gap between the front panel and the door, and the leakage of microwaves, the leakage of steam, and the phenomenon of sparks generated between the front panel and the door. It is an object of the present invention to provide a door interlock switch for a microwave cooking apparatus, which aims to solve the problem.

  In order to solve the above technical problem, a technical solution according to the present invention provides a door interlock switch of a microwave cooking apparatus used for locking between a door and a door front panel, and a door hook provided on the door; An interlock part provided on a door front panel and at least one micro switch, wherein the interlock part includes a bracket, a cam provided on the bracket and rotatable with respect to the bracket, and the cam attached to the bracket. The door hook is provided with a positioning plate and a hook hole, and the cam is provided with a lock hook that can be engaged with the hook hole of the door hook. Is provided with a trigger button, on both sides of the bracket, A microwave interlocking device door interlock switch provided with a fixing structure for attaching the microswitch, the cam being provided with a projection and an arc-shaped touch part for contacting the trigger button of the microswitch I will provide a.

  Further, a circular shaft protrudes from one side of the bracket, the cam includes a shaft sleeve that externally fits the circular shaft, and the cam is rotatably connected to the bracket by the shaft sleeve and the circular shaft. Yes.

  Further, a slip-off preventing bump is provided at a position close to the end surface of the circular shaft of the bracket, and a groove through which the slip-off preventing bump can be passed is provided inside the shaft sleeve of the cam. The bump is externally fitted to the circular shaft, and the bump is outside the shaft sleeve.

  Further, the cam is provided with a contact plate capable of contacting the tip of the hook hole plate of the door hook, and an opening groove is formed between the contact plate and the lock hook. The cam has a tip plate provided with a T-shaped hole, and the lock hook and the contact plate of the cam are provided facing the “T” -shaped hole.

  Further, the bracket further has an arc-shaped hole, and the arc-shaped touch portion is disposed so as to penetrate the arc-shaped hole.

  Specifically, the fixing structure includes two pins and two clips of the bracket protruding in a lateral direction, and each of the microswitches is provided with two shaft holes that match the pins. The microswitch has the pin fitted by the shaft hole, and the clip engages both sides of the microswitch.

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

  The beneficial effects of the door interlock switch of the microwave cooking apparatus according to the present invention are as follows. When the door is closed by mating with the fixed size door hook provided on the door and the lock hook provided on the interlock part on the back side of the door front panel, the door hook hits the cam and the cam When rotated and rotated at a certain angle, the door hook engages with the lock hook. By the action of the elastic member, the cam can pull the door hook toward the door front panel, and the door can be tensioned. At this time, the positioning plate in the door hook and the door front panel come into contact with each other, so that the door is not kept close to the door front panel, and the distance between the door front panel and the door is about 0.3 to 3 mm. Can be controlled. This distance can effectively prevent microwave leakage and steam leakage, and can prevent a spark phenomenon caused by the distance between the door and the door front panel being too close.

  Another technical problem to be solved by the present invention includes a door and a door front panel, and the door and the door front panel are controlled to be locked by a door interlock system, and the door interlock system includes at least two door interlock systems. It is providing the microwave cooking device containing the said door interlock switch.

  Specifically, there are two door interlock switches, one of the door interlock switches is provided with two micro switches, and the other door interlock switch is provided with one micro switch. Of the three microswitches, any two are normally open microswitches and the other is a normally closed microswitch, and when the door is opened, the protrusion of the cam or the arc-shaped touch portion is twisted. Due to the action of the spring, the trigger button of each micro switch is not touched, the two normally open micro switches are turned on, the normally closed micro switch is turned off, and at this time, the entire system is powered off. When the microwave cooking device does not operate and the door is closed, the door hook is When the trigger button of each microswitch is touched, and the trigger button of the normally closed microswitch is touched first, the normally closed microswitch is turned on, and two normally open The micro switch is turned off, and the microwave cooking apparatus is in a standby state at this time.

  Or, specifically, there are two door interlock switches, and each of the door interlock switches is provided with two micro switches, one of which is a normally closed micro switch and the other is a normally open micro switch. When the door is opened, the cam projection or arc-shaped touch part does not contact each microswitch by the action of the torsion spring, and the two normally open microswitches are turned on, When the two normally closed micro switches are turned off, the entire system is powered off, the microwave cooking device does not operate, and the door is closed, the door hook comes into contact with the cam, The trigger button of the micro switch is touched, and the trigger button of the normally closed micro switch By being touched earlier, the two normally closed micro switch is turned on, furthermore, the two normally open micro switch is turned off, the microwave cooking apparatus is in a standby state at this time.

  The beneficial effects of the microwave cooking device according to the present invention are as follows. Since the microwave cooking apparatus according to the present invention employs the door interlock switch described above, the distance controllability between the door and the door front panel is good, and the door hinge system is unacceptable in size and worn. However, the distance between the door and the door front panel can be effectively controlled to about 0.3 to 3 mm, and the distance between the door and the door front panel, which is likely to be caused due to the problem of the door hinge system, is uncontrollable. Occurrence of various phenomena, sparks that are easily generated when the distance between the door and the front panel of the door is too close, leakage of microwaves that occurs when the upper gap between the door and the front panel of the door is too large, The problem of steam leakage is effectively solved, and at the same time, the control problem of the electrical system of the microwave device is solved.

It is a decomposition structure schematic diagram of Embodiment 1 of the door interlock system of the microwave cooking device by the embodiment of the present invention. It is a decomposition structure schematic diagram of the door interlock switch of the microwave cooking device by the embodiment of the present invention. 1 is an exploded schematic view of a door interlock switch of a microwave cooking apparatus according to an embodiment of the present invention. It is decomposition | disassembly structure schematic diagram 2 of the door interlock switch of the microwave cooking device by embodiment of this invention. It is a three-dimensional structure schematic diagram of the door hook used for the door interlock switch of the microwave cooking apparatus by embodiment of this invention. It is the three-dimensional structure schematic diagram 1 of the bracket used for the door interlock switch of the microwave cooking device by embodiment of this invention. It is the three-dimensional structure schematic diagram 2 of the bracket used for the door interlock switch of the microwave cooking device by embodiment of this invention. It is the three-dimensional structure schematic diagram 1 of the cam used for the door interlock switch of the microwave cooking device by embodiment of this invention. It is the three-dimensional structure schematic diagram 2 of the cam used for the door interlock switch of the microwave cooking device by embodiment of this invention. It is a front structure schematic diagram when the door interlock switch of the microwave cooking device by the embodiment of the present invention is turned on. It is a back surface structure schematic diagram when the door interlock switch of the microwave cooking device by the embodiment of the present invention is turned on. It is a front structure schematic diagram when the door interlock switch of the microwave cooking device by the embodiment of the present invention is turned off. It is a back surface structure schematic diagram when the door interlock switch of the microwave cooking device by the embodiment of the present invention is turned off. It is a decomposition | disassembly structure schematic diagram of Embodiment 2 of the door interlock system of the microwave cooking device by embodiment of this invention. It is a structure schematic diagram of the microswitch in the embodiment of the present invention.

  In order to further clarify the technical problem, technical solution, and beneficial effect to be solved by the present invention, the present invention will be described in further detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

  The door interlock switch of the microwave cooking apparatus by this invention is demonstrated referring FIGS. 1-6 and FIG. The door interlock switch of the microwave cooking apparatus is used for locking between the door 100 and the door front panel 200. The interlock switch includes a door hook 1 provided on the door 100, an interlock component 2 provided on the door front panel 200, and at least one micro switch 3. The interlock component 2 includes a bracket 21, a cam 22 provided on the bracket 21 and rotatable with respect to the bracket 21, and an elastic member 23 for returning the cam 22 at the bracket 21. The door hook 1 is provided with a positioning plate 11 and a hook hole 10. The cam 22 is provided with a lock hook 220 that can be engaged with the hook hole 10 of the door hook 1. The micro switch 3 is provided with a trigger button 30. Fixing structures 210 for attaching the microswitch 3 are provided on both sides of the bracket 21. Each microswitch 3 is attached to the bracket 21 by a fixing structure 210. The cam 22 is provided with a projecting portion 224 and an arc-shaped touch portion 225 for contacting the trigger button 30 of the micro switch 3. When the door 100 is closed, the microswitch 3 can be controlled to control the operating state of the microwave cooking device with a specific structural design.

  The door interlock switch of the microwave cooking apparatus according to the present invention includes a door hook 1 having a constant size in the door 100, a lock hook 220 in the cam 22 in the interlock component 2 on the back side of the door front panel 200, When the door 100 is closed, the front end of the door hook 1 abuts against the cam 22 and rotates it. When the cam 22 rotates at a certain angle, the door hook 1 engages with the lock hook 220. To do. By the action of the elastic member 23, the cam 22 can pull the door hook 1 toward the door front panel 200, and the door 100 can be tightly tensioned. At this time, the positioning plate 11 in the door hook 1 comes into contact with the door front panel 200, prevents the door 100 from continuing to approach the door front panel 200, and increases the distance between the door front panel 200 and the door 100. It can be controlled to about 0.3 to 3 mm. This distance can effectively prevent microwave leakage and steam leakage, and can prevent a spark phenomenon that occurs when the distance between the door 100 and the door front panel 200 is too close.

  Furthermore, as shown in FIGS. 6 to 9, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, a circular shaft 211 projects from one side of the bracket 21, and A shaft sleeve 221 that can be externally fitted to the circular shaft 211 is provided, and the cam 22 is rotatably connected to the bracket 21 by the shaft sleeve 221 and the circular shaft 211. As a result, when the front end of the door hook 1 abuts against the cam 22, the cam 22 can rotate with respect to the bracket 21 around the circular axis 211 at a constant arc degree, and at the same time, the cam 22 is operated by the action of the elastic member 23. Can pull the door hook 1 toward the door front panel 200 so that the door 100 is automatically tensioned. The distance between the door front panel 200 and the door 100 is controlled to about 0.3 to 3 mm.

  Furthermore, as shown in FIGS. 7 to 10, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, the escape prevention bump 2111 is located at a position near the end surface of the circular axis 211 of the bracket 21. Is provided. On the inner side of the shaft sleeve 221 of the cam 21, a groove 2211 through which the escape prevention bump 2111 can pass is provided. When mounting, the bump 2211 is aligned with the groove 2211 and then the cam 22 is pushed toward the bracket 21. When the shaft sleeve 221 is fitted around the circular shaft 211, the cam 22 slides off from the circular shaft 211 of the bracket 21 by rotating the bump 2111 outside the shaft sleeve 221 by rotating at a certain angle. It can be guaranteed that it is impossible. The structure is simple and reliable, other fixing members are unnecessary, and the installation is convenient.

  Further, as shown in FIGS. 1, 5 to 8 and 10 to 13, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, the cam 22 includes a door hook 1. A contact plate 223 capable of contacting the tip of the hook hole plate 12 is provided, and an opening groove 203 is formed between the contact plate 223 and the lock hook 220. The bracket 21 has a tip plate 213 provided with a “T” -shaped hole 213, and the bracket 21 is fixed to the back side of the door front panel 200 by the tip plate 213. The lock hook 220 and the contact plate 223 of the cam 22 are provided to face the “T” -shaped hole 2130. The front end of the door hook 1 passes through the “T” -shaped hole 2130, aligns with the opening groove 20, and abuts against the abutment plate 223 to rotate the cam 22 relative to the bracket 2, and lock hook 220 Is engaged through the hook hole 10 from below, and the door 100 is pulled toward the door front panel 200 by the action of the elastic member 23 to be locked.

  Further, as shown in FIGS. 6 and 13, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, the bracket 21 is further provided with an arc-shaped hole 214, and the arc The shape touch part 225 is disposed so as to penetrate into the arc-shaped hole 214. Thus, when the cam 22 rotates, the protruding portion 224 and the arc-shaped touch portion 225 have a unique structure that can simultaneously touch the trigger buttons 31 of the microswitch 3 attached to both sides of the bracket 21.

  Further, as shown in FIGS. 6, 7, and 10 to 13, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, each fixing structure is laterally moved from the bracket 21. Two pins 215 and two clips 216 projecting from each other. Each of the microswitches 3 is provided with two shaft holes that match each other on the pin 215, the microswitch 215 externally fits the pin 215 through the shaft hole, and the clip 216 engages both sides of the microswitch 3. Yes. With such a fixing structure and fixing method, the microswitch 3 can be easily attached and detached, the connection after fixing is reliable, and the assembly position is accurate.

  Furthermore, as shown in FIGS. 1 to 4, 6, 7, 9, 10, and 12, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, The member 23 is a torsion spring, the first connection hole 212 is provided in the bracket 21, and the second connection hole 222 is provided in the cam 22. The torsion spring has one end inserted into the first connection hole 212 and the other end inserted into the second connection hole 222. Thus, a constant tensile force is generated between the bracket 21 and the cam 22 by the torsion spring, and the cam 22 can be returned. In order to facilitate attachment, the first connection hole 212 may be slightly larger, for example, a large hole of a triangle, a quadrangle, or other shape.

  Furthermore, as shown in FIG. 8, as one specific embodiment of the door interlock switch of the microwave cooking apparatus according to the present invention, the end portion of the lock hook 220 has a cylindrical surface structure. Due to such a cylindrical surface, the lock hook 220 is easily hooked into the hook hole 10 of the door hook 1 when the door is closed, and even when the door is opened, the lock hook 220 can easily come out of the hook hole 10 and not function. Does not occur.

  The present invention further provides a microwave cooking apparatus. As shown in FIGS. 1 and 14, the microwave cooking apparatus includes a door 100 and a door front panel 200. The door 100 and the door front panel 200 are controlled to be locked by a door interlock system having at least two door interlock switches. Of course, two micro switches 3 may be attached corresponding to one door interlock switch, and the door interlock switch is not limited to two, and may be three or three or more. Is not limited to three and may be four or four or more.

Embodiment 1
As shown in FIG. 1, there are two door interlock switches. Two micro switches 3 are provided in one door interlock switch, one micro switch 3 is provided in the other door interlock switch, and any two of the three micro switches 3 are normally open. A microswitch and the other one is a normally closed microswitch. When the door 100 is opened, the projecting portion 224 or the arc-shaped touch portion 225 of the cam 22 does not contact the trigger button 30 of each microswitch 3 by the action of the torsion spring, and the two normally open microswitches are turned on. The normally closed micro switch is turned off. At this time, the entire system is powered off, and the microwave cooking apparatus does not operate. On the other hand, when the door 100 is closed, the door hook 1 comes into contact with the cam 22 and the trigger button 30 of each micro switch 3 is touched. When the trigger button of the normally closed micro switch is touched first, the normally closed micro switch is turned on. Then, the two normally open micro switches are turned off, and the microwave cooking apparatus is in a standby state at this time.

Embodiment 2
As shown in FIG. 14, there are two door interlock switches. However, unlike the first aspect, two micro switches 3 are provided for each door interlock switch, and one of them is a normally closed micro switch. The other is a normally open microswitch. That is, a total of four micro switches are provided in two interlock switches. Any two microswitches 3 may be normally open switches, and the remaining two microswitches 3 may be normally closed switches. When the door 100 is opened, the projecting portion 224 or the arc-shaped touch portion 225 of the cam 22 does not contact each micro switch 3 by the action of the torsion spring, and the two normally open micro switches are turned on, and the two normally closed The micro switch is turned off. At this time, the entire system is powered off, and the microwave cooking apparatus does not operate. On the other hand, when the door 100 is closed, the door hook 1 comes into contact with the cam 22 and the trigger button of each micro switch 3 is touched. When the trigger button 30 of the normally closed micro switch is touched first, the two normally closed micro switches are turned on. Then, the two normally open micro switches are turned off, and the microwave cooking apparatus is in a standby state at this time.

  Since the microwave cooking device according to the present invention employs the door interlock system, the distance between the door 100 and the door front panel 200 can be suitably controlled. Even when the door hinge system is defective in size or worn, the distance between the door 100 and the door front panel 200 can be suitably controlled to about 0.3 to 3 mm, which is easily brought about by a malfunction of the door hinge system. Occurrence of an uncontrollable phenomenon of the distance between the door 100 and the door front panel 200 is avoided. Sparks that are easily generated when the distance between the door 100 and the door front panel 200 is too close, microwave leakage that is generated when the gap between the door 100 and the door front panel 200 is too large, and steam Problems such as leakage are effectively solved. At the same time, the problem of control of the electrical system of the microwave device is preferably solved.

Although only the preferred embodiments of the present invention have been described above, they are not intended to limit the present invention, and any modifications, equivalent replacements or improvements made within the spirit and principle of the present invention will be claimed. Should be included within the scope of
(Appendix 1)
In the door interlock switch used for locking between the door and the door front panel,
A door hook provided on the door; an interlock component provided on the door front panel; and at least one micro switch.
The interlock component includes a bracket, a cam provided on the bracket and rotatable with respect to the bracket, and an elastic member for returning the cam at the bracket,
The door hook is provided with a positioning plate and a hook hole,
The cam is provided with a lock hook for engaging with a hook hole of the door hook,
The micro switch is provided with a trigger button,
A fixing structure for attaching the microswitch is provided on both sides of the bracket,
The cam is provided with a protrusion and an arc-shaped touch part for contacting the trigger button of the micro switch,
A door interlock switch.
(Appendix 2)
A circular axis protrudes on one side of the bracket,
The cam includes a shaft sleeve that externally fits the circular shaft,
The cam is rotatably connected to the bracket by the shaft sleeve and the circular shaft.
The door interlock switch according to Supplementary Note 1, wherein
(Appendix 3)
At the position close to the end surface of the circular axis of the bracket is provided with a prevention bump,
A groove is provided on the inner side of the shaft sleeve of the cam to allow the escape prevention bump to pass through.
The shaft sleeve externally fits the circular shaft,
And the bump is outside the shaft sleeve,
The door interlock switch according to Supplementary Note 2, wherein
(Appendix 4)
The cam is provided with a contact plate capable of contacting the tip of the hook hole plate of the door hook,
An opening groove is formed between the contact plate and the lock hook,
The bracket has a tip plate with a “T” shaped hole,
The lock hook and the contact plate of the cam are provided facing the “T” shaped hole,
The door interlock switch according to Supplementary Note 1, wherein
(Appendix 5)
The bracket further has an arc-shaped hole, and the arc-shaped touch part is disposed so as to penetrate through the arc-shaped hole.
The door interlock switch according to Supplementary Note 1, wherein
(Appendix 6)
The fixing structure includes two pins and two clips of the bracket protruding in a lateral direction,
Each of the microswitches is provided with two shaft holes that match the pins,
The micro switch externally fits the pin through the shaft hole,
The clip engages both sides of the microswitch,
The door interlock switch according to Supplementary Note 1, wherein
(Appendix 7)
The elastic member is a torsion spring;
The bracket is provided with a first connection hole,
The cam is provided with a second connection hole;
The torsion spring has one end inserted into the first connection hole and the other end inserted into the second connection hole.
The door interlock switch according to any one of appendices 1 to 6, characterized in that:
(Appendix 8)
In a microwave cooking apparatus comprising a door and a door front panel,
The door and the door front panel are locked by a door interlock system,
The interlock system includes at least one of the door interlock switches;
The microwave cooking device characterized by the above-mentioned.
(Appendix 9)
There are two door interlock switches,
The one door interlock switch is provided with two micro switches,
The other door interlock switch is provided with one micro switch,
Of the three microswitches, any two are normally open microswitches and the other is a normally closed microswitch,
When the door is opened, the projecting portion of the cam or the arc-shaped touch portion does not contact the trigger button of each microswitch by the action of the torsion spring, and the two normally open microswitches are turned on. The closed micro switch is turned off, at this time, the entire system is powered off, the microwave cooking device does not work,
When the door is closed, the door hook comes into contact with the cam, the trigger button of each micro switch is touched, and the trigger button of the normally closed micro switch is touched first, so that the normally closed micro switch Is turned on, and the two normally open microswitches are turned off, and the microwave cooking device is in a standby state at this time.
9. The microwave cooking apparatus according to appendix 8, wherein
(Appendix 10)
There are two door interlock switches,
Each of the door interlock switches is provided with two micro switches,
One of them is a normally closed microswitch, the other is a normally open microswitch,
When the door is opened, the projecting portion of the cam or the arc-shaped touch portion does not contact the respective microswitches by the action of the torsion spring, and the two normally open microswitches are turned on, and the two normally closed The micro switch is turned off, and at this time, the entire system is powered off, the microwave cooking device does not work,
When the door is closed, the door hook comes into contact with the cam, the trigger button of each micro switch is touched, and the trigger button of the normally closed micro switch is touched first, so that two normally closed micro switches are touched. The switch is turned on, the two normally open micro switches are turned off, and the microwave cooking device is in a standby state at this time.
9. The microwave cooking apparatus according to appendix 8, wherein

Claims (7)

In the door interlock switch used for locking between the door and the door front panel,
A door hook provided on the door; an interlock component provided on the door front panel; and at least one micro switch.
The interlock component includes a bracket, a cam provided on the bracket and rotatable with respect to the bracket, and an elastic member for returning the cam at the bracket,
The door hook is provided with a positioning plate and a hook hole,
The cam is provided with a lock hook for engaging with a hook hole of the door hook,
The micro switch is provided with a trigger button,
A fixing structure for attaching the microswitch is provided on both sides of the bracket,
The cam is provided with a protrusion and an arc-shaped touch part for contacting the trigger button of the micro switch,
A door interlock switch. A circular axis protrudes on one side of the bracket,
The cam includes a shaft sleeve that externally fits the circular shaft,
The cam is rotatably connected to the bracket by the shaft sleeve and the circular shaft.
The door interlock switch according to claim 1. At the position close to the end surface of the circular axis of the bracket is provided with a prevention bump,
A groove is provided on the inner side of the shaft sleeve of the cam to allow the escape prevention bump to pass through.
The shaft sleeve externally fits the circular shaft,
And the bump is outside the shaft sleeve,
The door interlock switch according to claim 2. The cam is provided with a contact plate capable of contacting the tip of the hook hole plate of the door hook,
An opening groove is formed between the contact plate and the lock hook,
The bracket has a tip plate with a “T” shaped hole,
The lock hook and the contact plate of the cam are provided facing the “T” shaped hole,
The door interlock switch according to any one of claims 1 to 3 . The bracket further has an arc-shaped hole, and the arc-shaped touch part is disposed so as to penetrate through the arc-shaped hole.
The door interlock switch according to any one of claims 1 to 4, wherein the door interlock switch is provided. The fixing structure includes two pins and two clips of the bracket protruding in a lateral direction,
Each of the microswitches is provided with two shaft holes that match the pins,
The micro switch externally fits the pin through the shaft hole,
The clip engages both sides of the microswitch,
The door interlock switch according to any one of claims 1 to 5 . The elastic member is a torsion spring;
The bracket is provided with a first connection hole,
The cam is provided with a second connection hole;
The torsion spring has one end inserted into the first connection hole and the other end inserted into the second connection hole.
The door interlock switch according to any one of claims 1 to 6.

Images