JPH0512652Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heating cooking device such as a microwave oven, and particularly to a door opening/closing device provided with a door lock mechanism in this heating cooking device.

[Technical background of the invention and its problems]

The door opening/closing device of this type of heating cooking apparatus that has already been proposed is constructed as shown in FIGS. 4 to 7.

That is, in FIGS. 4 to 7, an oven frame 3 forming an oven 2 is provided inside a box-shaped case body (cabinet) 1 of the heating cooking apparatus. An opening/closing door 4 that opens laterally is provided in the opening 3a so as to be openable and closable. Further, an operation panel 8 is attached to the front of the case body 1, and includes a timer 5, a cooking push button 6, and a door push button (door opening push button) 7 that slides in the horizontal direction. Inside the case body 1, where the panel 8 is located, there is built-in a door lock mechanism I, which constitutes the main part of the present invention (see FIG. 5).

That is, in FIG. 5, a pair of hook members 9 are provided at the free end 4a of the opening/closing door 4 so as to slide downward by the elasticity of a coil spring 10. Each lock portion 11a, 1 engages each hook 9a, 9b of the hook member 9.
1b is attached to the side wall of the oven frame 3. Also, the above hook 9
A first door switch 12 is attached to the engagement passage where the hook 9a engages with the lock portion 11a, and this first door switch 12 is activated when the hook 9a engages with the lock portion 11a during opening/closing. I'm starting to do that. Further, a hook-shaped horizontal guide frame 13 is formed in the middle of the lock base plate 11 where the lock portion 11b that engages the hook 9b is located, and the horizontal guide frame 13 has a notch 14a. A horizontal slider 14 having a horizontal slider 14 is biased outwardly (to the left in FIG. 5) by the elasticity of an extensible coil spring 15 and is slid in the horizontal direction. Furthermore, a contact point 16a of a safety switch (short switch) 16 is provided in a protruding manner in the movement path of the notch 14a of the horizontal slider 14.
The contact 16a of No. 6 has the hook b connected to the locking portion 11.
b, when pushing one end of the horizontal slider 14 against the elasticity of the coil spring 15,
The safety switch 16 is actuated by pushing the horizontal slider 14 through the notch 14a.

On the other hand, near the horizontal guide frame 13 formed in the middle of the lock board 11, a pair of vertical guide frames 17 are provided perpendicularly to the horizontal guide frame 13 so as to form a vertical groove. A vertical slider 18 is loosely fitted in 17 .
Further, as shown in FIG. 6, this vertical slider 18 is provided with a head 18b at the upper part of the main rod 18a.
A leg foot portion 18c is provided at the lower part of this main rod 18a, and this leg foot portion 18c is adapted to be pushed up by a door lock release member 26, which will be described later.
Further, the main rod 18a of the vertical slider 18 has an intermediate slider 19 as shown in FIG.
is slidably provided with a coil spring 20 interposed therebetween, and this coil spring 20 urges the vertical slider 18 to float. Furthermore, the intermediate slider 19 is provided with a locking piece 19b that locks an actuating piece 19a of the second door switch 21 and a switch actuating arm 25, which will be described later. As shown in , an inclined surface 19c is formed on the lower surface, and this inclined surface 19c allows the switch operating arm 25 to be easily engaged and disengaged without being deformed by wear due to use or high heat. ing.

On the other hand, as shown in FIG. 6, a cover member 22 is provided on the lock base plate 11 on which the vertical guide frame 17 is located, and covers the operating piece 1 of the intermediate slider 19.
9a and the locking piece 19b are attached so as to protrude laterally (horizontally). That is, this cover member 22 prevents the vertical slider 18 and intermediate slider 19 from falling off laterally, and
A strip hole 22 bored in the middle of this cover member 22
A is provided with the locking piece 19b projecting laterally. Further, a bearing 23 is formed at the lower part of the cover member 22, and this bearing 23 and a bearing (not shown) formed on the side wall of the case body 1 are connected as shown in FIG. , a horizontal support shaft 24 is mounted horizontally. Furthermore, a switch operating arm 25 and a door lock release member 26 are coaxially mounted on this horizontal support shaft 24.
This switch actuating arm rod 25 is composed of an actuating rod part 25a and a pushing rod part 25b, and the actuating rod part 25a, as shown in FIG.
The elasticity of the coil spring 27 urges it to engage with the locking piece 19b of the intermediate slider 19. Furthermore, the lower horizontal support shaft 24 of the switch operating arm 25 is connected to the door lock release member 26.
are coaxially mounted, and the door lock release member 26 is connected to the release piece 2 as shown in FIG.
6a extends below the leg piece 18c of the vertical slider 18, and this release piece 26a is configured to separate the hook portion 9b of the hook member 9 from the lock portion 11b via the vertical slider 18. It's getting old.

The switch actuation arm 25 is located above the horizontal support shaft 24, and the door lock release member 26 is provided below the switch actuation arm 25, so that the cooking push button 6 Door push buttons 7 are arranged at the top and bottom to improve operability and eliminate erroneous operations. or,
The cooking push button 6 having a push rod 6a is provided at the lower part of the operation panel 8 located on the front side of the push rod portion 25b so as to project forward by the elasticity of the coil spring 6b. A door push button 7 that slides in the horizontal direction and has a push rod 7a is mounted on the operation panel 8 below the cooking push button 6 and on the front side of the door lock release member 26. It is attached so that it protrudes forward by the elasticity of 7b.

Therefore, when closing the opening/closing door now, if the shelf board on which the food to be cooked is placed is inserted into the oven 2 and the opening/closing door 4 is then closed, the opening/closing door 4 will be closed as shown in FIG. Each hook 9a, 9 of the hook member 9
b is each lock part 11a, 11b of lock board 11
At the same time, the one hook 9a is engaged with the
Turn on the first door switch 12.

On the other hand, the other hook 9b pushes the horizontal slider 14 against the elasticity of the coil spring 15, so that the notch 14a of the horizontal slider 14 operates the safety switch 16 and the head of the vertical slider 18. The portion 18b is pressed down against the elasticity of the coil spring 20. Then, this vertical slider 18 becomes
Although it slightly descends together with the intermediate slider 19 against the elasticity of the coil spring 20, since the locking piece 19b of the intermediate slider 19 is engaged with the stepped portion 25c of the switch operating arm 25,
This intermediate slider 19 is temporarily locked, and the operating piece 19a of this intermediate slider 19
cannot push the actuating piece 21a of the second door switch 21, and stands by in that state.

Next, after setting the timer 5, by pushing the cooking push button (start button) 6 of the operation panel 8 against the elasticity of the coil spring 6b, the push rod 6a is moved to the switch operating arm rod 25. The pushing rod part (see Figures 5 and 6) 25b is connected to the coil spring 2.
By rotating around the horizontal support shaft 24 against the elastic force of the intermediate slider 19, the locking piece 19 of the intermediate slider 19
b is separated from the stepped portion 25c of the operating rod portion 25a, and the intermediate slider 19 is lowered by the elasticity of the coil spring 20.
The operating piece 19a of 9 is the second door switch 21
The second door switch 21 is turned on by pushing the operating piece 21a. When you remove your finger from the cooking push button 6, the second door switch 21 turns on.
is maintained in the same state.

Next, when reopening the opening/closing door 4, the timer 5
After the set time elapses, press the door push button 7 with the coil spring 7b.
By pushing against the elastic force of the door push button 7, the push rod 7a of the door push button 7 rotates the door lock release member 26 around the horizontal support shaft 24. Then, release piece 2
6a pushes up the legs 18c of the vertical slider 18, and the head 18b of the vertical slider 18 separates the hooks 9a, 9b of the hook member 9 from the lock parts 11a, 11b, so that the horizontal slider 14. The intermediate slider 19 returns to its original position, and the first door switch 12, second door switch 21, and safety switch 16 are operated to open the door.

However, in the door opening/closing device of the heating cooking apparatus described above, there is a mechanism for assembling and adjusting the hooks 9a, 9b and the lock board 11 between the leg piece 18c of the vertical slider 18 and the release piece 26a of the door lock release member 26. Due to the gap A, the door lock release member 26 may be damaged due to vibrations caused by the high voltage transformer, cooling fan motor, etc. during cooking.
Not only does it resonate and generate noise, giving an unpleasant feeling, but the door lock release member 26, for example, is biased and worn due to wear due to vibration, which shortens the life of the component parts and reduces reliability. or may impair safety. Furthermore, since the door lock release member 26 can move freely by the gap A, there is a risk that noise will be generated during transportation of the product.

On the other hand, in the door opening/closing device, when the door push button 7 is pushed, the door lock release member 26 is rotated around the horizontal support shaft 24, and the vertical slider 18 is pushed up, and the opening/closing door 4 is opened. When the fingertip is removed from the door push button 7, the door push button 7 protrudes forward and moves back due to the elasticity of the coil spring 7b, but the door lock release member 26 returns to its original position due to its own weight. Due to the frictional resistance with the horizontal support shaft 24, the door lock release member 2 moves later than the door push button 7.
6 comes into contact with the push rod portion 7a of the door push button 7 and generates abnormal noise, which has the disadvantage of giving the operator a sense of uneasiness as the operator may mistake the sound for an abnormal sound that indicates a malfunction has occurred.

[Purpose of invention]

In order to eliminate the above-mentioned drawbacks, the present invention has a torsion coil spring interposed in the horizontal support shaft on which the door lock release member is mounted, thereby generating abnormal noise without damaging the clearance for assembly and adjustment. The purpose of the present invention is to provide a heating cooking device that aims to prevent this and also improve operability.

[Summary of the idea]

In the present invention, an opening/closing door is provided in the case body, a lock board having a lock portion that engages with a hook member of the opening/closing door is provided in the oven frame body inside the case body, and a vertical guide frame is formed on this lock board. , in a door lock mechanism in which a vertical slider of this vertical guide frame is fitted and an intermediate slider is slid in the middle of this vertical slider via a spring, a door push button that slides in the horizontal direction is provided. A cover member, in which a part of the intermediate slider is formed so as to protrude laterally, is fixed to the lock substrate on which the vertical guide frame is located, a horizontal support shaft is mounted on the cover member, and the horizontal support shaft is mounted on the cover member. A door lock release member configured to push up the vertical slider is mounted in a position where it can come into contact with an end of the door push button, and further,
A torsion coil spring is wound around the horizontal support shaft to urge the door lock release member to rotate in the locking direction of the horizontal operating direction of the door push button.

[Example of idea]

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In addition, in the present invention, the same constituent members as those in the above-mentioned specific example are given the same reference numerals, and the same functions are performed.

1 to 3, a cover member 22 is attached to the lock base plate 11 on which the vertical guide frame 17 is located, and a cover member 22 is attached to the operating piece 19a of the intermediate slider 19.
and a locking piece 19b is attached so as to protrude laterally (horizontally). In other words, this cover member 22 covers the vertical slider 18 and the intermediate slider 1.
The locking piece 19b is provided in a hole 22a drilled in the middle of the cover member 22 so as to protrude laterally. Moreover, the cover member 22
A bearing 23 is formed at the bottom of the case body 1, and a horizontal support shaft 24 is horizontally mounted between the bearing 23 and a bearing (not shown) formed on the side wall of the case body 1. Furthermore, a door lock release member 26 that pushes up the vertical slider 18 is mounted on this horizontal support shaft 24, and a torsion coil spring 40 is attached to this horizontal support shaft 24 to push up the door lock release member 26. It is wound and biased in the locking direction. That is, one end of the torsion coil spring 40 is engaged with the door lock release member 26, and the other end of the torsion coil spring 40 is
It is locked to a part of the cover member 22 near the bearing 23 (see FIG. 3).

Therefore, since the door lock release member 26 is always biased in one direction by the elasticity of the torsion coil spring 40, it may generate vibrations when driven by a high voltage transformer, cooling fan motor, etc. However, the door lock release member 26 no longer resonates, allowing quiet operation, and as shown in FIG. 5, even with the gap A, noise and vibration are generated during product transportation. There is no fear that it will happen.

On the other hand, above the door lock release member 26, each support shaft 37, 38 of the switch operating arm 25 is connected to a bearing 39 of the cover member 22 and a bearing (not shown) formed on the side wall of the case body 1. The switch actuating arm 25 is rotatably mounted on a shaft, and is composed of an actuating rod part 25a and a pushing rod part 25b.
As shown in FIGS. 1 and 2, the elasticity of the coil spring 27 urges the intermediate slider 19 to engage with the locking piece 19b.

Note that the free end 4a of the opening/closing door 4 has an upper
A lower pair of hook members 9 are pivotally attached to each support shaft, and both hook members 9 are connected by a connecting rod 42 and are urged in the locking direction by the elasticity of each coil spring 10. ing.

Further, since the biasing direction of the torsion coil spring 40 is the direction in which the door push button 7 is made to protrude, the coil spring 7b of the door push button 7 can be omitted.
Furthermore, it goes without saying that one end of the torsion coil spring 40 may be locked to the leg piece 18c to bias the vertical slider 18.

[Effect of idea]

Abnormality As mentioned above, according to the present invention, the opening/closing door 4 is provided in the case body 1, and the lock board 11 having the lock portions 11a, 11b that engages with the hook member 9 of the opening/closing door 4 is installed inside the case body 1. A vertical guide frame 17 is formed on the oven frame 3, and a vertical slider 18 is fitted to the vertical guide frame 17, and an intermediate slider 19 is attached to the middle of the vertical slider 18 via a spring 20. In the door lock mechanism, a door push button 7 that slides in the horizontal direction is provided, and a part 19b of the intermediate slider 19 is laterally attached to the lock base plate 11 where the vertical guide frame 17 is located. A cover member 22 formed to protrude from the door is fixed, a horizontal support shaft 24 is mounted on the cover member 22, and a door lock release member 26 is attached to the horizontal support shaft 24 so as to push up the vertical slider 18. The horizontal support shaft 2 is mounted at a position where it can come into contact with the end of the door push button 7.
4 is wrapped with a torsion coil spring 40 that urges the door lock release member 26 to rotate in the locking direction of the horizontal operating direction of the door push button 7, so that the door push button slides in the horizontal direction. 7, there is no danger of the door lock release member 26 rotating accidentally, which prevents the generation of vibration and noise, reduces wear, and eliminates discomfort during operation. Not only can the performance be improved, but since the configuration is simple, assembly is easy, and labor can be saved during assembly.

[Brief explanation of drawings]

Fig. 1 is a side view of the door lock mechanism of the heating cooking device of the present invention, Fig. 2 is an exploded perspective view of a part of the door lock mechanism, and Fig. 3 is a perspective view showing the main parts of the present invention. Fig. 4 is a perspective view of an already proposed heating cooking device, Fig. 5 is a side view of a door lock mechanism incorporated in this heating cooking device, and Fig. 6 is a partially exploded view of this door lock mechanism. The perspective view shown in FIG. 7 is a diagram for explaining the operation of this door lock mechanism. DESCRIPTION OF SYMBOLS 1...Case body, 4...Opening/closing door, 9...Hook member, 11...Lock board, 17...Vertical guide frame, 18...Vertical slider, 19...Intermediate slider, 22...Cover member, 24 ...horizontal support shaft,
26... Door lock release member, 40... Torsion coil spring.

Claims (1)

[Scope of utility model registration request] An opening/closing door is provided in the case body, a lock board having a lock portion that engages with a hook member of the opening/closing door is provided in the oven frame body in the case main body, a vertical guide frame is formed on this lock board, and a vertical guide frame is formed on the lock board. In a door lock mechanism in which a vertical slider is fitted into a frame and the intermediate slider is slid in the middle of the vertical slider via a spring, one of the intermediate sliders is attached to the lock substrate on which the vertical guide frame is located. a cover member fixedly formed so as to protrude laterally; a horizontal support shaft mounted on the cover member; a door push button that slides in the horizontal direction; and a door lock release member wrapped around the horizontal support shaft so as to rotate around the horizontal support shaft and push up the vertical slider; A heating cooking device comprising: a torsion coil spring that is biased to rotate in the locking direction of the operating direction.