JPH031688Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an oven door lock mechanism that is attached to the main body and door of an oven to open and close the door.

(Prior Art) As a conventional oven door lock mechanism, for example, as shown in FIG.
and an operation lever 36 which is rotatably installed horizontally around the periphery of the door 31 and integrally has a handle part 34 at one end and an engaging part 35 which removably engages with the locking hook part 33 at the other end. Some door openings and closings are provided by tilting the handle part 34 forward to remove the engaging part 35 from the locking hook part 33.

(Problem to be solved by the invention) However, with such conventional oven door locking mechanisms, when the engaging part disengages from the locking hook part and the locking mechanism is released, the door opens completely at once. If you do not open the door carefully by gradually opening it, your face and hands will be burned by the hot air released from the roasting chamber when the door is opened. There was a problem.

In view of these conventional problems, the present invention aims to provide an oven door locking mechanism that prevents the oven door from being directly exposed to hot air from the roasting chamber when the door is opened.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an oven door locking mechanism including a locking hook protruding from the oven body wall at a position corresponding to the door periphery. The door periphery includes a first engaging portion that removably engages with the locking hook when the door is in the closed state to maintain the closed state of the door;
a lever mechanism for retracting the engaging portion from the locking hook; a second engaging portion that releasably engages the locking hook to keep the door slightly open; and the locking hook A push lever is provided to release the engagement between the second engagement part and the second engagement part and fully open the engagement part.

(Function) In the oven door locking mechanism constructed as described above, when the locking hook portion and the first engaging portion are disengaged and the door is opened halfway, the locking hook portion and the second engaging portion are disengaged. The door is kept in a half-open state by being engaged with the engaging portion. Further, the door is fully opened by disengaging the locking hook portion from the second engaging portion.

(Example) Next, an example of implementing the present invention will be described with reference to the drawings of FIGS. 1 to 4.

In the figure, 1 is a gas oven that can be used in both dry and warm ovens. The gas oven 1 is equipped with a door 4 attached to the opening of the roasting chamber of the front wall 2 of the oven body by a pair of upper and lower hinges 3, 3 so as to be openable and closable.

A peripheral edge 4a of the opening/closing side end of this door 4, and a roasting chamber opening edge 2 of the main body front wall 2 at a position opposite to this peripheral edge 4a.
An oven door lock mechanism 5 for opening and closing the door 4 is provided at the oven door a.

The oven lock mechanism 5 has a locking hook 6 projecting from the roasting chamber opening edge 2a of the front wall 2 of the main body. The locking hook part 6 is fixed to the oven main body by screwing a flange 7 protruding from the periphery of the base end to the main body front wall 2.

A locking hook 8 is formed at the tip of this locking hook portion 6 . The locking hook 8 has an engaging surface 8a facing the front wall 2 of the main body, and also has an inclined surface 8b inclined toward the distal end on the back side of the engaging surface 8a.

On the other hand, an engaging part support frame 9 is attached to the peripheral edge 4a of the door 4. The engaging part support frame 9 supports an engaging part that releasably engages with the locking hook part 6 configured as described above.

The engagement part support frame 9 is formed in the shape of a vertically long housing, and is arranged parallel to the front wall 2 of the main body, with the front wall 9 on the far side
The upper part of a and the lower part of the rear wall 9b on the nearby side are each opened. An operating lever 10 for pulling up the first engaging portion is pivotally supported in the upper opening of the front wall 9a.

The operating lever 10 has a shaft 1 whose lower part is horizontally suspended between the front wall 2 of the main body and support frame side walls 9a and 9c disposed perpendicularly to each other.
1 is rotatably supported, and the upper end of the rear surface is in contact with the upper wall 9d of the support frame, and the spring 12 is supported so as to be tiltable forward about the shaft 11.
is biased in the direction of tilting backwards.

Further, the operating lever 10 has a handle 10a integrally formed on its upper part that projects upward from the front of the upper edge of the support frame 9, and a claw 10b that projects toward the front wall 2 of the main body at its lower end. By pulling the handle 10a toward you, the claw 10b
is rising.

A vibrator 13 arranged vertically within the support frame 9 is locked to this claw 10b.

The vibrator 13 is formed into a bifurcated shape, and an engagement shaft 13a extending horizontally across the fork portion is engaged with the pawl 10b in an upper position. The vibrator 13 is connected to an upper sliding rod 13b which is protruded upward at the middle position of the engaging shaft 13a and the engaging shaft 1.
It integrally has a pair of lower rods 13c, 13c for pulling the rocker, which are vertically disposed from both ends of the rocker 3a.

A vertically long hole 14 is formed at the tip of the upper rod 13b, and the support frame side wall 9 is inserted into this hole 14.
A horizontal shaft 15 is inserted between c and 9c.

The slider 13 connects the edge of the hole 14 of the upper rod 13b to this shaft 1.
5 to move vertically.

Further, a spring 16 is provided between the shaft 15 and the engagement shaft 13a.
is stretched across the slider 13, and the slider 13 is biased downward.

On the other hand, the lower ends of both lower rods 13c, 13c are connected to an oscillator 17, which is a first engaging portion. Oscillator 1
7 is a pair of swinging rods 17a formed in a U-shape;
17a are arranged facing each other, and both swinging rods 1
Both lower rods 13c, 13c are located in the middle of 7a, 17a.
The lower ends of the two are connected to each other via a shaft 18. Both swinging rods 17a, 17a have front wall side ends of the support frames rotatably supported by shafts 19 horizontally suspended between the support frame side walls 9c, 9c.

Further, between the ends of the support frame rear wall side of both swinging rods 17a, 17a, a locking hook of a locking hook portion 7a is inserted from an opening in the lower part of the support frame rear wall 9b when the door 4 is in a closed state. An engagement shaft 17b that engages with 8 is horizontally suspended.

Main body front wall 2 on the same horizontal plane as this engagement shaft 17b
At the side position, an engagement shaft 20a of the push lever 20, which is a second engagement portion, is arranged to face the engagement shaft 17b.

The push lever 20 includes a pair of side pieces 20b, 20b formed in a hook shape and arranged opposite to each other.
The aforementioned engaging shaft 20a, which engages with the engaging hook 8 when the door 4 is in a slightly open state, that is, when the door 4 is in a slightly open state, is horizontally suspended between the corner portions of 0b and 20b.

Both side pieces 20b, 20b have the tips of the horizontal pieces inside the support frame 9 rotatably supported on a shaft 21 horizontally suspended between the support frame side walls 9c, 9c, and are suspended from the side pieces and the support frame rear wall 9b. The support frame is disposed so as to be rotatable upward about a shaft 21, with the base of the vertical piece being brought into contact with the edge of the lower wall 9e of the support frame.

Also, between the both side pieces 20b and 20b, there is an engaging hook portion 6.
The locking hook 8 of the locking hook portion 6 and the engagement shaft 17 of the rocker 17 are respectively inserted between these two side pieces so that they engage with each other. There is.

Support frame lower wall 9e of both side pieces 20b, 20b
A pressing plate 20c is fixed between the more protruding front edges of the vertical pieces.

Reference numeral 22 denotes a reinforcing shaft horizontally suspended between the front and rear walls of the support frame 9.

Opening and closing of the oven door using the oven door locking mechanism constructed as described above is performed as follows.

As shown in FIG. 2, first, when the handle 10a of the operating lever 10 is pulled down toward you (in the direction A), the operating lever 10 rotates around the shaft 11, and the claw 10b rises. When the claw 10b rises, the engagement shaft 13a in contact with the claw 10b also rises, and the slider 13 is moved upward.

When the slider 13 moves upward, the oscillator 17 connected to the slider 13 rotates upward about the shaft 21, and the locking hook that was engaged with the locking hook 8 of the locking hook portion 6 is rotated upward. Pull up the mating shaft 17b.

As a result, the locking hook 8 and the engagement shaft 17 are disengaged, and the door 4 is opened slightly.

When the door 4 opens a little and moves forward, the engagement shaft 20a of the push lever 20 is simultaneously translated forward and engaged with the locking hook 8. As a result, the forward movement of the door 4 is suppressed, and the door 4 is kept in a slightly open state with a small gap. Next, the push plate 20c of the push lever 20
By pressing slightly diagonally upward, the push lever 20 rotates upward about the shaft 21, and the engagement shaft 20a is disengaged from the locking hook 8.

This allows the door 4 to move forward again.
The door 4 can be fully opened by pulling the handle 10a toward you.

To close the door 4, pull the operating lever 10 manually, push the door 4 back into the oven body with the engagement shaft 7 pulled upwards, then return the operating lever 10 to its original position and close the engagement shaft 17b. Either engage the locking hook 8 from above, or push the door 4 back into the oven body with the operating lever 10 returned to its original position.
The door 4 is locked by engaging the engagement shaft 17b with the locking hook 8 from the lateral direction.

In this embodiment, since the operating lever 10 is separate from the slider 13 and the rocker 17, the engagement shaft 17
b is laterally engaged with the locking hook 8, even if the oscillator 17 and slider 13 move upward when the engaging shaft 17b gets over the hook tip of the locking hook 8. Accordingly, the operating lever 10 does not tilt forward.

(Effects of the invention) The present invention is constructed as described above, and the first latch that removably engages with the latch hook protruding from the wall surface of the gas oven main body when the door is closed, maintains the door in the closed state. With the joint,
By providing second engaging portions on the periphery of the door that detachably engage with the locking hook portion when the door 4 is in a slightly open state and maintain the door in the slightly open state, the locking hook portion When the first engaging part is disengaged, the locking hook part engages with the second engaging part, and the door 4 is kept slightly open, and the hot air inside the oven is released from the door. Released laterally from the surroundings. Therefore, the door was suddenly opened,
This prevents accidents such as burns caused by direct contact with the face or hands of the hot air released when the door is opened.

[Brief explanation of the drawing]

1 and 2 are longitudinal cross-sectional views of an embodiment of the present invention, FIG. 1 is a diagram showing the engaged state of the first engaging part, and FIG. 2 is a diagram showing the engaged state of the first engaging part. 3 is a rear view of the engaging part, FIG. 4 is a front view showing an embodiment of the present invention in use, and FIG. 5 is an example of a conventional oven door lock mechanism. FIG. 6...Latching hook part, 8...Latching hook, 9...Engagement part support frame, 10...Operation lever, 10a...
Handle, 10b...Claw, 13...Slider, 13a...
...Engagement shaft, 13b...Upper lever, 13c...Lower lever, 1
4... Hole, 17... Rocker, 17a... Rocking rod,
17b...Engagement shaft, 20...Push lever, 20a
...Engagement shaft, 20b...Side piece, 20c...Press plate.

Claims (1)

[Scope of utility model registration request] A locking hook is provided on the oven main body wall at a position corresponding to the door periphery, and the door periphery is removably engaged with the locking hook when the door is in the closed state. a lever mechanism for retracting the first engaging portion from the locking hook portion, and a lever mechanism that releasably engages with the locking hook portion to keep the door slightly open An oven door locking mechanism comprising: a second engaging portion for holding the door; and a push lever for releasing the engagement between the locking hook portion and the second engaging portion to fully open the door.