JPS6235018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a high-frequency heating device with an improved mechanical locking mechanism for an opening/closing door.

(Prior Art) Since the door body of a high-frequency heating device is opened and closed in a complicated manner, it is required not only to have mechanical strength but also to be able to engage and disengage smoothly from the main body. It is also desired that the structure be simple and that the positioning of each component during assembly be as easy as possible, but a conventional mechanical lock mechanism is constructed as shown in FIG.

That is, on the auxiliary plate 4 on the main body 3 side facing the door hook 2 which is rotatably mounted on the door body 1, a lock 5 which can be freely engaged with and detached from the door hook 2 is provided. A slider fixture 6, which is also fixed to the auxiliary plate 4, is provided at the bottom of the lock 5, and this slider fixture 6 has a vertical portion 7 of the L-shaped slider 7.
a is supported so as to be vertically movable. The slider 7 is urged upward by a return spring 8 stretched between the horizontal portion 7b and the slider fixture 6. Furthermore, a mechanical lock switch 10 that is turned on when the slider 7 is lowered is attached to the bottom plate 9 on the side of the main body 3 facing the horizontal portion 7b of the slider 7. Further, a cooking button 12 is provided on the main body panel 11 facing the horizontal portion 7b of the slider 7, and an L-shaped holder 13 that can be freely engaged with and detached from the horizontal portion 7b is movable in the front part of the cooking button 12. It is set in.

When the door body 1 is closed and the door hook 2 is inserted into the lock 5, the door hook 2 is engaged with the lock 5 by the spring. At this time, since the horizontal portion 7b of the slider 7 is in contact with the holder 13, the slider 7 does not descend, and the mechanical lock switch 10 is also in the OFF state. When the cooking button 12 is pressed from this state, the holder 13 moves forward and the contact state with the slider 7 is released. Therefore,
The slider 7 is lowered by the pressing force of the door hook 2, and the mechanical lock switch 10 is turned on at its horizontal portion 7b.

(Problems to be Solved by the Invention) However, the mechanical lock mechanism of the conventional high-frequency heating device configured as described above has various disadvantages as follows.

(1) As shown in Fig. 2a, when the door hook 2 operates from this state and turns on the mechanical lock switch 10, the door hook 2 and the lock 5 move downward while drawing the door body 1 into the main body 3. The frictional force between them increases. (Non-operation) (2) As shown in figure b, the dimension a cannot be made large because the lock 5 is concealed. Since the lock 5 and the slider 7 are separate bodies, if the dimension a is not secured due to variations in installation, the door hook 2 will cross over. (Non-operation) (3) As shown in c in the same figure, the slider 7 is made of plastic mold and has a long L shape, so it is prone to deformation due to shrinkage after molding, changes over time, etc.
Dimension control is difficult. (Inoperation of mechanical lock switch 10 due to increase in invalid stroke) (4) As shown in d in the same figure, since the point at which the load is applied to slider 7 is far away at l = 51.5 mm, the force F' is directed in the direction of the arrow. It acts as a bending stress f, causing deformation using the corner of the L shape as a fulcrum. This eventually leads to permanent deformation.

(Inoperation of mechanical lock switch 10) Furthermore, the frictional force between the slider 7 and the auxiliary plate 4 increases. (Slider 7 does not operate) (5) As shown in the figure e, since the hooking position of the return spring 8 of the slider 7 is shifted from the center of the slider 7 by a = 14 mm, the auxiliary plate 4, the slider fixing The contact friction force with the slider 6 becomes large, resulting in unstable operation and deformation of the slider 7. (Inoperation of mechanical lock switch 10 due to increase in invalid stroke) (6) As shown in figure f, the span between the mounting part of holder 13 and the point where force F is applied to slider 7 is a=
It is 27mm and deforms downward due to force F. Further, the holder 13 is provided with play in order to slide in the direction of the arrow, and b=0.3 mm in design, and force F causes deformation of b+α.

(When the door body is closed, the horizontal part 7b of the slider 7
is lowered and the mechanical lock switch 10
is turned on, cooking starts without any operation of the cooking button 12, and the cooking lamp flashes or lights up.) (7) As shown in g in the same figure, the a dimension is
Although the maximum is 1.0 mm, it is very difficult to manage the a dimension because the slider 7 has a large play.
(Inoperation of mechanical lock switch 10 due to increase in invalid stroke) (8) Lock 5 connects to main body 3 via auxiliary plate 4, slider 7 connects auxiliary plate 4 to main body 3, holder 13 connects main body panel 11 and mechanical The lock switches 10 are individually attached to the bottom plate 9 as separate members. Therefore, play occurs due to variations during assembly, and deformation occurs due to vibration even after assembly. (This will cause the mechanical lock switch 10 to malfunction and the door hook 2 to cross over.) The present invention has been made based on the various circumstances described above, and it is possible to facilitate positioning and adjustment during assembly, and also to smoothly and It is an object of the present invention to provide a high frequency heating device having a mechanical lock mechanism that operates reliably.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a mechanical lock mechanism that includes a switch operation part of a mechanical lock switch in part and a door hook in contact with one end. a linear rod-shaped slider having an engaging part at one end and an engaging part at the other end and biased toward the abutting part by a return spring inserted in the middle part; A holder that has an engagement receiving part and is rotatably provided, an operating arm that projects sideways from the holder, and a holder that is provided opposite to the operating arm and that is connected to the holder via the operating arm. a cooking button which releases the engagement between the engaging part of the slider and the engaging receiving part of the holder by rotating and deflecting it by a pressing force, and at least the slider and the holder are connected to the main body. It is installed on an auxiliary plate fixed inside.

(Function) In the above configuration, when the door is closed and the door hook engages with the lock, the tip of the door hook rests on the abutment part of the slider, so a gap is created between the door hook and the lock. , the slider can be reliably pushed down without any frictional force occurring between the two. In addition, since the door hook comes into contact with the abutment part of the linear rod-shaped slider and presses it down directly, the pressing force of the door hook is
To surely operate a mechanical lock switch by smoothly sliding a slider in the direction of its axis. Moreover, since the return spring is fitted in the middle of the linear rod-shaped slider, the slider can always obtain a biasing force in the axial direction, and can slide smoothly without tilting.
Furthermore, since the holder that holds the slider is rotatable, the engagement and disengagement between the engaging portion and the holder is smooth and reliable.Furthermore, the holder has an operating arm that protrudes to the side. Since the operating arm is pressed by the cooking button, there is no restriction on the mounting position of the cooking button attached to the operation panel, and the cooking button can be installed at any position on the operation panel.

(Example) An example of the present invention will be described below with reference to FIGS. 3 to 6. In FIG. 3, reference numeral 21 denotes a main body of the high-frequency heating device, and a door body 23 for opening and closing the opening of the high-frequency heating chamber 22 is pivotally attached to the front part of the main body 21. A handle 24 is provided at the free end of this door body 23, and springs 25a,
First door hook 25 biased by 26a
and a second door hook 26 are vertically spaced apart and project from each other. These first and second door hooks 25,
A mechanical locking mechanism 27, which will be described later, is provided on the main body 21 facing the locking mechanism 26.

Next, the mechanical lock mechanism 27 will be explained based on FIG. 4. In the figure, 28 is the main body 2
This auxiliary plate 28 has a first lock 29 that engages with the first door hook 25 at the top, and a second lock 30 that engages with the second door hook 26 at the bottom. is provided. A slide cam 31 is provided in the first lock 29 so as to be movable back and forth, and is urged by a compression spring 32 in the direction of protruding into the first lock 29. A shot switch 33 is provided at the top of this slide cam 31, and this is a first switch.
When the door hook 25 engages with the first lock 29, the slide cam 31 is turned on. Furthermore, the first lock 2
A lock switch 34 is provided at the bottom of the door 9, which means that the first door hook 25 is connected to the first lock 2.
When engaged with 9, it is pressed down and turned ON.

On the other hand, the auxiliary plate 28 located below the second lock 30 is provided with a guide member 35, and the guide member 35 supports a rod-shaped slider 36 that is slidable vertically. This slider 36 has a return spring 37 fitted in the middle part.
The second door hook 26, the contact portion 38, and the switch operation portion 39 are provided at the upper end of the door hook 26, and the engaging portion 40 is provided at the lower end. And this slider 3
A mechanical lock switch 41 fixed to the auxiliary plate 28 is provided at the lower part facing the switch operation section 39 of No. 6. Furthermore, the slider 36
A holder 43 is provided on the auxiliary plate 28 located at the lower part of the auxiliary plate 28. The holder 43 is rotatably pivoted to the support shaft 42. This holder 43 is provided with an engagement receiving part 44 that can be freely engaged with and disengaged from the engagement part 40 of the slider 36 in order to hold or release the slider 36 that slides in the vertical direction. It is biased clockwise. The engagement receiving portion 4 is formed to have a radius of curvature centered on the support shaft 42, and as shown in FIG. It is starting to break down into
Furthermore, an operating arm 46 that projects horizontally is fixed to the lower end of the holder 43. Further, a cooking button 49 having a return spring 48 is provided on the operation panel 47 of the main body 21 facing the operating arm 46.
This is in contact with the front surface of the operating arm 46 via the operating rod 50.

Next, the operation of the mechanical lock mechanism 27 constructed as described above will be explained.

First, when the door is open, the short switch 3
3. The lock switch 34 and the mechanical lock switch 41 are in the OFF state, and when the door body 23 is closed from this state, as shown in FIG. 6A,
The first door hook 25 engages the first lock 29. Therefore, the slide cam 31 is pressed by the first door hook 25 and slides rearward. Therefore, the shot switch 33 is turned on, and the lock switch 34 is turned on to close the first door hook 2.
5, it is directly pressed and turned ON. In this way, when the first door hook 25 and the first lock 29 first engage, the second door hook 26 also engages with the second lock 30 at the same time. By engaging, the main body 21 and the door body 23 come into close contact with each other, and
The tip of the second door hook 26 rests on the abutting portion 38, and the second
A gap g is created between the second door hook 26 and the second lock 30, and no frictional force is generated between the two. The second door hook 26 is attached to the slider 3.
6, but the engaging portion 4 provided at the lower end of the slider 36
0 is engaged with the engagement receiving portion 44 of the holder 43, so the slider 36 does not operate. That is, the mechanical lock switch 41 is in the OFF state.

Next, as shown in Figure B, when the cooking button 49 is pressed, the operating rod 50 slides backward,
The holder 43 is pressed through the holder 43. Therefore, the holder 43 rotates counterclockwise about the support shaft 42 to release the engagement between the engagement portion 40 of the slider 36 and the engagement receiving portion 44 . For this reason, slider 3
6 is lowered along the guide member 35 by the pressing force of the second door hook 26, and the switch operating portion 3
9 turns on mechanical lock switch 41.
state.

Next, when you release your finger from the cooking button 49 as shown in FIG. It comes into contact with and stops in the same state as B in the same figure. Therefore,
The second door hook 26 is also held locked in the second lock 30 to continue cooking.

In this way, when the cooking is completed and the door body 23 is opened after a certain period of time has elapsed, the first door hook 2
5 escapes from the first lock 29, while the second door hook 26 also escapes from the second lock 30 as shown in FIG. Furthermore, the slide cam 31 is connected to the slider 3 by a compression spring 32.
6 are respectively returned by return springs 37,
Shot switch 33, lock switch 34 and mechanical lock switch 41 are all OFF.
state.

[Effects of the Invention] As described above, the present invention provides a slider operated by a door hook and a holder that engages with and disengages from the slider on the auxiliary plate fixed in the main body, so that the mutual positioning of the components during assembly is facilitated. Adjustments can be made easily.

In addition, when the door is closed and the door hook engages with the lock, the tip of the door hook rests on the abutting part of the slider, creating a gap between the door hook and the lock, which creates a frictional force between the two. The slider can be reliably pushed down without causing any problems. In addition, since the door hook comes into contact with the abutting part of the linear rod-shaped slider and pushes it down directly, the pressing force of the door hook is used to smoothly slide the slider in the direction of its axis and to operate the mechanical lock switch reliably. let Moreover, since the return spring is fitted in the middle of the linear rod-shaped slider, the slider can always obtain a biasing force in the axial direction, and can slide smoothly without tilting. Furthermore, since the holder that holds the slider is rotatable, the engagement and disengagement between the engaging portion and the holder is smooth and reliable.Furthermore, the holder is provided with an operating arm that protrudes to the side. Since this operating arm is pressed by the cooking button, the cooking button attached to the operation panel has various effects such as being able to be installed at any position on the operation panel without restrictions on its mounting position.

[Brief explanation of the drawing]

1 and 2 show a conventional mechanical lock mechanism, in which FIG. 1 is a perspective view, FIGS. 2a to 2g are side views for explaining its operation, and FIG.
6 to 6 show an embodiment of the high-frequency heating device according to the present invention, FIG. 3 is a perspective view showing a state in which a mechanical lock mechanism is attached to the high-frequency heating device, and FIG. 4 shows the main parts thereof. Perspective view shown, fifth
The figure shows the relationship between the slider and the holder in its main parts, and FIGS. 6A to 6D are action explanatory views. In the figure, 21 is the main body, 23 is the door body, 26 is the door hook, 27 is the mechanical lock mechanism, 28 is the auxiliary plate, 36 is the slider, 37 is the return spring, 3
8 is a contact portion, 39 is a switch operation portion, 40 is an engagement portion, 41 is a mechanical lock switch, 43 is a holder, 44 is an engagement receiving portion, and 49 is a cooking button.

Claims (1)

[Claims] 1 A main body having a high-frequency heating chamber, a door body pivotally supported by the main body to open and close the opening of the high-frequency heating chamber, a door hook rotatably attached to the door body, and a main body facing the door hook. The cooking button is provided with a lock provided therein so as to be freely engageable and detachable from the door hook, a slider that is activated when the door body is closed and the door hook engages with the lock, and a holder that holds the slider. In a high-frequency heating device that has a built-in mechanical lock mechanism in which the above-mentioned holder is activated to release the hold on the slider and the slider operates a mechanical lock switch, the above-mentioned mechanical lock mechanism is partially mechanical. The switch operation part of the lock switch is a straight rod-shaped rod having a contact part with the door hook at one end and an engaging part at the other end, and is biased toward the contact part by a return spring inserted in the middle part. a slider, a rotatably provided holder having an engagement receiving part that can be freely engaged and detached from the engagement part of the slider, an operating arm that projects laterally from the holder, and the operating arm. A cooking method for disengaging the engagement portion of the slider and the engagement receiving portion of the holder by rotationally deflecting the holder by a pressing force through the operating arm provided opposite to the holder. 1. A high-frequency heating device comprising a button, and at least the slider and the holder are provided on an auxiliary plate fixed within the main body.