JPH0423467Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a cooking appliance in which a lid is attached to the cooking appliance body via a hinge unit so as to be rotatably openable and closable.

<Prior art> When rice is cooked in an electric rice cooker, which is an example of a heating cooker, steam containing slime generated during cooking adheres to the outer lid, etc. and contaminates it. I needed to wash the sticky residue. For this reason, the applicant has provided an electric rice cooker that has no electrical parts inside the outer lid and is detachably attached to the rice cooker body so that the outer lid can be washed completely.

As shown in FIG. 15, for example, the electric rice cooker with a removable outer lid is provided with a fitting recess 90a at a predetermined position of the outer lid 90 facing the hinge unit 91. A fitting member 92 to be fitted is provided on the hinge unit 91, and is further engaged with the outer cover 90 so that the fitting member 9
A retaining member 93 for preventing the fitting member 2 from coming off is provided within the fitting member 92.

The retaining member 93 includes a locking piece 93a that protrudes from inside the fitting member 92 and can be locked in the through hole 90b of the outer cover 90, and a direction in which the locking piece 93a and the outer cover 90 are maintained in a locked state. A spring member 93 that biases the
b.

<Problem to be solved by the invention> However, in the above electric rice cooker, the outer lid 90
When removing the outer cover 90, it is necessary to release the locking state of the locking piece 93a against the spring force of the spring member 93b, which makes the removal operation of the outer cover 90 troublesome and the above-mentioned lock release operation. Since it requires either the right or left hand, it is not possible to hold the outer cover 90 with both hands.
There was a drawback that the outer cover could fall off.

Therefore, in view of the above-mentioned problems, it is an object of this invention to provide a heating cooker equipped with a removable lid, in which the lid can be easily removed.

<Means for Solving the Problems> In order to achieve the above object, the heating cooker of this invention has a lid removably fitted to the hinge unit, and the hinge unit and the lid are provided with a An engaging portion and an engaged portion are provided that engage with each other when the lid is fitted and are disengaged when the lid is removed. Either one of the parts is resiliently biased so that the engagement state between the engaging part and the engaged part is released when a certain extraction force is applied to the lid body. There is.

<Function> According to the above configuration, when the lid is fitted to the hinge unit, the engaging portion and the engaged portion provided on the hinge unit and the lid prevent the lid from fitting into the hinge unit. They engage with each other. Since either the engaging portion or the engaged portion is elastically biased, it is possible to prevent the lid from coming off during normal use.

On the other hand, when the lid is opened and a certain amount of pulling force is applied to the lid so as to release the engaged state between the engaging part and the engaged part, the engaging part resists the elastic force and The engaged state between the lid and the engaged portion is released, and the lid can be removed from the hinge unit.

<Example> Hereinafter, an example of an electric rice cooker will be described as an example of the cooking device of the present invention.

FIG. 1 is a longitudinal sectional view of the electric rice cooker. In the figure, the electric rice cooker has an outer case 1 constituting the main body of the electric rice cooker, which includes a cylindrical cover member 10 formed of a thin metal plate and a synthetic resin cover member 10 formed on the lower side of the cover member 10. It is formed by a bottom member 11 and a synthetic resin shoulder member 12 formed on the upper side of the cover member 10. Further, a lid unit 2 serving as a lid for closing the upper part of the outer case 1 is connected to the outer case 1 so as to be rotatably openable and closable via a hinge unit 7 including a hinge pin 70. It is detachably attached to the Further, a locking mechanism 8 is provided on the upper part of the outer case 1 on the opposite side to the hinge unit 7, and is engaged with a predetermined position of the lid unit 2 to maintain the closed state of the lid unit 2.

Inside the outer case 1, there is a cylindrical inner container 1.
3, and this inner container 13 houses an inner pot 14 for cooking rice in a removable manner.
Moreover, between the inner container 13 and the cover member 10,
A heat insulating material 15 is provided to prevent heat radiation from the inner pot 14. Furthermore, a center sensor 16 is provided in a penetration part formed in the center of the bottom surface of the inner container 13, and a center sensor 16 is provided in the bottom surface of the inner pot 14 and
A hot plate 17 is provided between the hot plate 1 and
7, an annular rice cooking heater 18 that directly heats the inner pot 14 is buried in a state surrounding the center sensor 16.

The lid unit 2 is formed into a hollow structure by an outer cover 20 made of synthetic resin provided on the outer surface side and an inner cover 21 made of synthetic resin provided on the inner surface side. The cover 21 is joined with good airtightness by high frequency welding or the like. Further, a steam exhaust port 22 is provided approximately at the center of the lid unit 2, and a one-touch pin attachment hole 5 is provided below the steam exhaust port 22. A rubber one-touch gasket 23 is attached to the one-touch pin attachment hole 5. Further, an inner lid 3 for closing the inner pot 14 is provided below the lid unit 2, and a steam hole of the inner lid 3 is provided at the center of the bottom 30 of the inner pot 3. A one-touch pin 24 having a built-in pressure regulating device 4 for releasing steam introduced above the inner lid 3 through 34 to the outside is fixed by a fixing member 25 such as a screw. The inner lid 3 is detachably attached to the lid unit 2 via a one-touch pin 24 which is removably attached to a one-touch gasket 23. In addition, the lid unit 2
A gasket 21b attached to the recess 21a of the inner cover 21 seals the space between the inner cover 3 and the inner cover 3 to prevent steam from leaking to the outside from sources other than the pressure regulator 4.

As shown in FIGS. 2 and 3, this lid unit 2 is provided with a fitting recess 28 on the rear end side facing the rear hinge unit 7, and a fitting recess 28 is formed in the upper part of the hinge unit 7. In addition, the fitting recess 28 is removably fitted into a hollow fitting member 73 having a plate shape.

The fitting member 73 is rotatably supported by the hinge pin 70 and is connected to the lid unit 2 by a torsion spring 74 inserted through the hinge pin 70.
is biased in the direction of opening. This results in
When the lock mechanism 8 is unlocked, the lid unit 2 can be automatically opened by the spring force of the torsion spring 74.

As shown in FIG. 4, the inside of the fitting member 73 is provided with an engaging part 75 that is attached to a through hole formed on the bottom side of the fitting member 73 so as to be able to move forward and backward, and that has a hemispherical tip (lower end in the drawing). are doing.

On the other hand, when the fitting member 73 is fitted into the fitting recess 28, the fitting recess 28
The engagement member 73 is provided with an engaged recess 28a in which the distal end of the fitting member 73 is engaged to prevent the fitting member 73 from coming off. This engaged recess 28a is formed into a bowl shape large enough to accommodate the tip of the engaging portion 75.

Further, a spring member 76 is attached to the engaging portion 75 to resiliently bias the protruding tip side toward the engaged recess 28a, and the engaged state of the engaging portion 75 and the engaged recess 28a is is maintained so that the fitting member 73 does not come out naturally from the fitting recess 28.

The spring pressure of the spring member 76 is determined when a certain pulling force (strength that allows the operator to pull out the lid unit 2) is applied in the direction of pulling out the fitting member 73 from the fitting recess 28. , spring member 7
The engaging portion 75 engages the engaged recess 28 against the spring force of 6.
It is pushed out from the engaged recess 28a and retreats according to the slope a, and the engaged part 75 and the engaged recess 2
The engagement state with 8a is set to be released.

Therefore, simply by pulling out the lid unit 2, the engagement state between the engaging portion 75 and the engaged recess 28a is released, allowing the fitting member 73 to be pulled out from the fitting recess 28, and the lid unit is removed. 2 can be removed from the hinge unit 7.

The torsion spring 74 for automatically rotating the lid unit 2 to open the lid is attached by inserting a coiled main body portion through the hinge pin 70, as shown in FIG. , hinge pin 70
It is provided in a substantially symmetrical shape with respect to a radial plane near the middle of the radial direction. The number of turns of one torsion spring 74a (on the right side in the drawing) is smaller than that of the other torsion spring 74b (on the left side in the drawing). For this reason, while the torsion spring 74b is set to have a spring force sufficient to fully open the lid unit 2, as shown by the symbol B in FIG. 6, the torsion spring 74a with a small number of turns is The spring force is set to be enough to open part 2 part way (indicated by symbol A). As a result, when the lid unit 2 starts to be opened, the spring force of both springs 74a and 74b can be applied to the lid unit 2 to easily rotate it in the opening direction, and the lid unit 2 can be easily rotated in the opening direction.
When rotating to the open end side beyond the range of , apply only the spring force of one torsion spring 74b,
The rotational force applied to the lid unit 2 can be weakened.

Further, on the hinge pin 70 side of the fitting member 73, there is a brake member 78 formed in a cylindrical shape made of an elastic material and abutting against the hinge mounting portion 77 on the outer case 1 side.
is provided. The hinge mounting portion 77 has a substantially arc shape around the hinge pin 70 so as to be in particularly strong pressure contact with the brake member 78 near the open end of the lid unit 2 within the rotation range of the lid unit 2, and has an open end. The sides are formed into increasingly larger radii. As a result, at the open end of the lid unit 2,
The brake member 78 is strongly pressed against the hinge mounting portion 77 and can brake the rotation of the lid unit 2.

Therefore, in this electric rice cooker, two torsion springs 74a and 7 with different spring forces are used as described above.
4b combined with the braking action of the brake member 78, the automatically opening lid unit 2 can be stopped at its open end without impact, thereby preventing the electric rice cooker from falling over due to impact. can be prevented.

The pressure regulating device 4 includes a valve seat 40 and a rod-shaped valve body 41 having a circular cross section.
By moving up and down with respect to the valve seat 40,
A pair of coil springs 42 and 43 are provided to open and close the steam passage of the pressure regulator 4. This pressure regulating device 4
can maintain pressure while constantly releasing steam little by little through a small gap between the valve body 41 and the valve seat 40.
This is a so-called open-hole control valve type.

One of the coil springs 42 and 43 is
For example, it is a coil spring made of a shape memory alloy such as Ni-Ti alloy or Cu-Al-Zn alloy, and the valve body 41
It is interposed between the upper end of the valve seat 40 and the upper end of the inner cylindrical portion 40c of the valve seat 40. This shape memory alloy spring 42
is set to undergo martensitic transformation when the temperature reaches a temperature corresponding to the temperature of steam flowing through the pressure regulator 4 during boiling (approximately 80°C to 95°C), and the shape is memorized in an elongated state. .

The lower side of the one-touch gasket 23 prevents the slime accumulated in the one-touch pin mounting hole 5 from flowing back toward the bottom 30 side of the inner lid 3.
A seal packing 50 is provided to prevent steam from being released to the outside from sources other than the pressure regulator 4.

As shown in FIGS. 7 and 8, the lock mechanism 8 is provided with a housing section 82 on the upper part of the shoulder member 12 of the outer case 1, which stores an L-shaped hook 81 so as to be able to reciprocate in the horizontal direction. There is. The hook 81 is provided with a locking portion 81a on the outer surface of its vertical portion, and is urged outward by a spring 83 within the housing portion 82. The locking portion 81a is provided so as to be lockable with the locked portion 20a provided at the lower end of the peripheral edge of the outer cover 20 on the lid unit 2 side, and the locking portion 81a locks with the locked portion 20a. If this is done, the closed state of the lid unit 2 can be maintained. Note that 84 indicates that the hook 81 is connected to the housing portion 8.
2. After inserting the hook 81 into the housing part 82, by attaching the mounting member 84,
The hook 81 can be securely attached.

According to the electric rice cooker of the above embodiment, the locking mechanism 8 that maintains the lid unit 2 in the closed state operates the hook 81 in the horizontal direction of the outer case 1 to release the lock. Moreover, since it is provided facing inward, the lock will not be released even if the lid is touched carelessly, and unnecessary opening of the lid can be prevented.

On the other hand, push in the hook 81 of the lock mechanism 8,
When the locking state of the locking portion 81a with respect to the locked portion 20a is released, the lid unit 2 releases the torsion spring 74.
Opening of the lid is started by . When the lid unit 2 rotates and approaches its open end, the brake is applied to the rotation of the lid unit 2 as described above, and the lid unit 2 stops at the open end without impact.

If the lid unit 2 is dirty with sticky material, etc., when the lid unit 2 is opened as described above, slide the lid unit 2 with a certain force or more in the direction to remove it, and the engaging portion 75 will fit. The fitting member 73 moves on the slope of the engaged recess 28a of the recess 28 and retreats inward, causing the engagement part 75 and the engaged recess 28a to move.
The locked state between the fitting member 73 and the fitting recess 28 is released, and the fitting member 73 can be pulled out from the fitting recess 28.

In addition, since the removed lid unit 2 is formed with good airtightness, the entire lid unit 2 can be washed with water.

When the lid unit 2 is washed with water, the fitting member 73 is fitted into the fitting recess 28 by sliding it in the fitting direction. In this state, the engaging portion 75 is biased toward the engaged recess 28a by the spring, so that it maintains the engaged state with the engaged recess 28a and the lid unit 2 is reliably attached to the hinge unit. Ru. As long as a certain pulling force is not applied to the lid unit 2, the lid unit 2 will not come off during normal opening/closing or by careless touching.

9 to 12 are sectional views of main parts showing an electric rice cooker as another embodiment of this invention,
In comparison with the electric rice cooker of the above embodiment, the fitting member 73
The configurations of the engaging portion and the brake member provided in the two are different.

That is, in the example shown in FIG.
1 is formed by a plate spring formed in a substantially U-shape, and one end 752 is connected to the fitting member 73.
The fitting member 73 is fixed therein, and has a U-shape with the other end protruding from the through hole of the fitting member 73, and the tip of the protruding portion engages with the engaged recess 28a. The above-mentioned engaging part 7
The elastic force with which 51 is pushed into the engaged recess 28a is:
The setting is substantially the same as that of the engaging portion 75 described above.

The brake member 781 that brakes the rotation of the lid unit 2 is formed by a J-shaped leaf spring, and the bent end 781 is a J-shaped leaf spring.
81a is provided on the open end side of the lid unit 2 so as to be in strong pressure contact with the hinge mounting portion 77.

In FIG. 10, the bottom of the fitting member 73 is formed to be elastically deformable, and a part thereof is formed to bulge downward into a substantially hemispherical shape so that it can be engaged with the engaged recess 28a. An example including an engaging portion 755 is shown.

In addition, in the example shown in FIG. 11, an elastically deformable plate-like body is bent into a J-shape when viewed from the side, and the straight end (on the left side in the drawing) is formed into a substantially V-shape. ,
An engaging portion 756 that can be engaged with the recess 28a is provided, and a brake portion 782 is further provided at the bent end. These intermediate portions are formed as attachment portions 783 for the fitting member 73 , and a bolt or the like is inserted through the attachment portion 783 to fix the engagement portion 756 to the engagement member 73 .

Furthermore, in the example shown in FIG.
is formed by a plate provided along the inside of both side walls of the fitting member 73, the proximal end is inserted into the hinge pin 70, and the distal end is bent outward in a substantially V-shape. This configuration engages with a recess (not shown) provided in the side wall of the fitting recess 28. In addition,
This engaging portion 757 connects the central portions of both members with a plate-shaped brake member 784, and is formed into an H-shape in plan view. 13 and 1
As shown in FIG. 4, the brake member 784 portion is fixed to the fitting member 73 by screwing it to the fitting member 73.

In each of the above-described embodiments, similarly to the first embodiment, if each of the engaging portions is an engaged recess, the fitting member 73 can be prevented from coming off in normal usage conditions.

Furthermore, in each of the above-described embodiments, when a certain extraction force is applied to the lid unit 2, the engagement between the engaging portion and the engaged recess can be released, and the lid unit 2 can be removed. .

Furthermore, if the fitting member 73 is inserted into the fitting recess 28 of the removed lid unit 2, the engaging part and the engaged recess will engage again, and the engaging part will spring in the direction of the recess. This means that the lid unit 2 is attached to the rice cooker main body so that it does not come off during normal use.

In each of the above embodiments, the engaging portion is provided on the fitting member side and the engaged recess is provided on the fitting recess side, but the mounting positional relationship between the engaging portion and the recess is Conversely, the engaging portion may be provided on the fitting recess side and the engaged recess may be provided on the fitting member side.

In addition, the shape of the engaging part and the engaged part is limited to a hemispherical or V-shaped engaging part as described above, as long as the engagement between the two can be released by a certain extraction force. In addition, it is possible to set an arbitrary shape and form an engaged part to match the engaging part, and the structure is not limited to the configuration of the above-described embodiment, and various other shapes can be used without changing the gist of this invention. design changes can be made.

Further, the engaged portion is not limited to the above-mentioned recessed portion, but may be formed by a stepped portion or the like with a raised side on the withdrawal side.

Moreover, the fitting recess 28 provided in the lid unit 2 is
Although an example is shown in which the upper side of the lid unit 2 is open, a hollow fitting recess may be formed in which only the insertion side of the fitting member 73 is opened.

<Effects of the invention> As described above, according to the heating cooker according to the invention, the lid body and the hinge unit are provided with an engaging part and an engaged part, and a certain extraction force is applied. Since the engaging part or the engaged part is elastically biased to maintain the engaged state between the two until the lid is removed, pull the lid in the direction of removal. It is possible to release the engaged state between the engaging portion and the engaged portion by simply pressing the button. Therefore,
When removing the lid, there is no need to perform a lock release operation, and the lid can be easily removed. Moreover, in this case, the lid can be removed while supporting it with both hands, so the work can be carried out safely without fear of dropping the lid.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the electric rice cooker according to this invention, Fig. 2 is a perspective view of the lid unit,
Figure 3 is a reference perspective view with the lid unit removed, Figure 4 is a sectional view of the main parts near the hinge mechanism, and Figure 5 is a cross-sectional view of the main parts near the hinge mechanism.
The figure is a perspective view of the torsion spring built into the hinge mechanism, Figure 6 is a side view showing the lid unit in the open state, Figure 7 is an exploded perspective view showing the main parts of the lock mechanism, and Figure 8 is the lock mechanism. 9 to 12 are sectional views and perspective views showing other embodiments of the invention; FIGS. 13 and 14 are sectional views and perspective views of essential parts of the embodiment of FIG. 12; FIG. 15 is a sectional view of a main part of a conventional electric rice cooker. 2...Lid unit (lid body), 28a...Engaged recess, 7...Hinge unit, 75,751,7
55,756,757...Engaging portion, 76...Spring member.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cooking device in which the lid is attached to the cooking device main body via a hinge unit so that it can be rotated to open and close, the lid is removably fitted to the hinge unit. The hinge unit and the lid include an engaging portion and an engaged portion that engage with each other when the lid is fitted into the hinge unit and are disengaged when the lid is removed. The engaging state of the engaging part and the engaged part is released when a certain pulling force is applied to the lid body on either one of the engaging part and the engaged part. A heating cooker characterized by being elastically biased so as to