JP2828962B2 - Pressure cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure cooker for cooking rice or boiled food by applying pressure.

[0002]

2. Description of the Related Art It has long been known to cook and cook delicious rice by increasing the pressure in a pot containing water and rice.

[0003] In the case of a rice cooker, it has been clarified that cooking rice with a pressure value equal to or higher than the atmospheric pressure, for example, 1.1 kgf / cm ² , results in particularly delicious rice.

As such prior art, Japanese Patent Application Laid-Open No. 6-46956 filed by the present applicant is presented.

[0005] However, the same applies to the case of the above-mentioned prior art and other pressure cookers, but when cooking rice by increasing the pressure, not only the pot but also the opening of the pot is sealed. A large pressure is also applied to the lid, which acts as if the lid is pushed up and opened.

[0006]

As a result, a large stress acts on the lock device provided on a part of the lid for preventing the lid from being opened, so that the lock device is damaged or the lock is released and the lid is suddenly moved. It was very dangerous to open to the public.

[0007] If each of the components constituting the lock device is made of a thick metal or a strong material and has a robust mechanism, the pressure in the pot is applied to the entire lid, and this lid is used. Was sometimes deformed or suddenly damaged. This is because the pressure in the pot is applied to the lid because the pressure in the pot is blocked by the hinge portion of the lid and the locking device due to the robustness of the locking device.

Further, in the pressure cooker, since the locking device is designed to be robust, the locking state is hard and cannot be released easily (light force), and much time has passed since the completion of cooking. If the inside of the pot drops to a safe pressure value even if it is not kept warm, the lid can be opened and the food can be eaten, but in reality there is a short time after the end of cooking In this case, since the pressure in the pot is slightly increased, there is a problem that the locked state is too hard to release easily.

According to the present invention, in a cooking device for performing pressure cooking, the locking state of the locking device is ensured, and the locking device is easily released even if the locking state is reliable.

[0010]

According to the present invention, there is firstly provided a cooker body accommodating an inner pot having an outwardly bent flange, and a safety valve and a steam vent valve which cover the opening of the inner pot. A lid, a hinge portion provided on one side of the cooking device main body,
A lock release button rotatably provided on the other side of the cooker body opposite to the hinge portion and having a hook portion on the inside,
A stopper positioned below the flange and bent outwardly, a lid provided above the cooking device main body, a lid provided inside the lid, one side pivotally supported by the hinge portion and the other side hinged on the other side. A reinforcing plate extending to the opposite side, an engaging piece projecting outward and an axial support portion that is supported by the reinforcing plate on the inner side of the position of the engaging piece, A crank-shaped locking plate having a hook portion bent toward the opposite side to the engagement piece, wherein cooking is performed by increasing the pressure in the inner pot by the safety valve and the steam release valve. The locking portion is raised by the pressing operation of the lock release button, and the engaging piece is pushed up to release the locking between the locking portion and the stopper.

In the second aspect of the present invention, the position of the pivot portion of the locking plate is located inside the position where the hook portion and the stopper are hooked.

[0012]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of a pressure cooker of the present invention in a normal state where pressure is not applied, FIG. 2 is a partial cross-sectional view of the same, FIG. FIG. 5 is a partial cross-sectional view of a cover showing an application example when the pressure is increased.

[0013] (1) is a cooker main body, which is constituted by the following members. (2) is a synthetic resin frame, (3)
Is a storage case provided inside the frame (2) and having a mounting portion (W) on the upper periphery for mounting a flange of an inner pot described later, and (4) is provided at the bottom of the storage case (3). An induction heating coil (hereinafter, referred to as a heating coil) serving as a heat source, and (5) an inner pot made of a magnetic material removably housed in the storage case (3), which is bent outward at the periphery of the upper opening. The flange (F) is formed. (6) is a ring-shaped fixing frame for fixing the upper peripheral edge of each of the frame (2) and the storage case (3), and has a hinge portion (7) on one side.

(8) Reference numeral (8) denotes a plurality of metal stoppers which are provided below the flange (F) and on the outer upper portion of the storage case (3) and are bent outward. W). (9) is an operation display section provided on the frame (2) at a position opposite to the hinge section (7), and (10) is near the operation display section (9) and is not shown in detail. An operation unit (11) exposed to the outside by a lock release button rotatably provided by a shaft;
The portion that has entered the inside has a hook portion (12) whose tip is inclined upward, and the operating portion (11) and the hook portion (12) are constantly urged upward by a spring (13). .

A cover (14) is located above the cooking device main body (1) and is pivotally supported on one side of the cooking device main body so as to be openable and closable, and is constituted by the following members. (15) is the outer lid,
(16) is an inner lid fixed by forming a space (17) with the outer lid (15), and (18) is detachably attached to the inner lid (16) and has an outer peripheral edge of the inner pan (15). 5) an inner lid placed on the upper surface of the flange (F) to cover the opening of the inner pot;
(19) is provided on the lid (14) and is provided on the outer lid (1).
5) communicates with the inner lid (16) to release steam in the space (17); and (20) attaches / detaches the inner lid (18) provided at the center of the lower surface of the outer lid (15). A receiving portion which can be freely attached, (21) is a reinforcing plate disposed in the lid (14) and having parallel bent pieces (22) and (22), and one side is pivotally connected to the hinge portion (7). The other side is extended to a position on the opposite side of the hinge portion to face the operation portion (11), and shaft holes (23) and (23) and a stretch hole (24) are provided on both sides of the end portion. )
(24) is provided.

A transmission mechanism (25) is disposed in the space (17) and fixed at a position relatively close to the operation portion (11) of the reinforcing plate (21). The transmission mechanism has a vertically long guide groove (26). A member (27), a transmission plate (29) having a guide piece (28) fitted in the guide groove (26) and moving up and down in the guide member (27), and urging the transmission plate upward And a push-up spring (30).

A pressure release button (31) is provided above the transmission plate (29) and is provided on the outer lid (15) so as to be vertically movable. The pressure release button is always urged upward by a return spring (32). I have.

(33) is a crank-shaped (L-shaped) side surface
A locking plate made of metal, which is horizontally long upwardly and slightly inclined at a lower side of the lock release button (10), and has slots (34) and (34) through which a shaft (40) to be described later is inserted; Working piece (35) extending toward the hook portion (1).
An engaging piece (3) located at the top of
6), and a plurality of hooks (37) (37) bent downward toward the side opposite to the engaging piece and hooked to the stoppers (8) (8). Further, tension pins (38) (3) provided near the slots (34) and (34) are provided.
8).

Reference numeral (39) denotes a return spring which is stretched between the stretch holes (24) and (24) and the stretch pins (38) and (38). 8)
(8) The bias is applied to the side.

(40) The locking plate (33) is rotatably supported on the lid (14) by passing through the shaft holes (23) and (23) and the long holes (34) and (34). The shaft constitutes a shaft support (40A) in a state of being inserted through the shaft hole and the long hole.

As can be seen from the vertical line (X) in FIG.
7) The (37) is arranged at a position where it enters the inside of the lid from the position where the stoppers (8) and (8) are engaged.

Thus, the transmission mechanism (25) and the locking plate (33) hold the hooks (37) and (37) on the stoppers (8) and (8) as the inner lid (18) rises. A stop movable pressure mechanism (41) is configured.

(42) is a safety valve provided on the inner lid (18) and inserted into the steam vent cylinder (19), and (43) is also provided at the center of the inner lid (18). 2
An engagement portion having a steam vent valve (44) engaging with 0);
(45) is a pressure responsive valve provided at a position of the inner lid (18) facing the transmission mechanism (25).

A display box (46) is formed integrally with the inner lid (18), penetrates the upper portion of the locking plate (33), and is provided to face the display window (47) of the outer lid (15). 48)
Is a lamp substrate for displaying the rice cooking process and the pressure state in the inner pot (5) disposed in the display box (46).

Next, the rice cooking operation will be described. Inner pot (5)
In a normal state where there is no pressure rise in the inside, the inner lid (18) does not rise, and the locking plate (33) has a pivot support (40A) with a small amount of the long holes (34) (34) as shown in FIG. It is located at the lock release button (10) side by a distance.

In this state, the plate (A) (see FIG. 1) extending to the hooks (37) (37) and the stoppers (8) (8)
Are parallel to each other in the vertical direction, and when the lock release button (10) is pressed and operated, the hook (12) easily pushes up the engaging piece (36) to raise the hook (37) ( 3
The locked state (locked state) between 7) and the stoppers (8) and (8) can be released.

In the normal state shown in FIG. 1, when the heating coil (4) is energized and an eddy current is generated in the inner pot (5),
The inner pot (5) itself generates heat and heats water and rice. The pressure in the inner pan (5) rises with the heating, and the pressure becomes 1.1 kgf.
When the pressure reaches / cm ² , the steam is released from the steam vent valve (44) and released to the atmosphere via the steam vent cylinder (19).

On the other hand, the pressure of the inner pot (5) at this time pushes up the entire inner lid (18), and the pushing force of the inner lid (18) is at the position shown by (P) in FIG. At 16), the entire lid (14) is pushed up.

As described above, one side of the reinforcing plate (21) is pivotally supported by the cooker body (1), and the other side is the hooks (37) (3).
7) and the stoppers (8) and (8) are locked, so that the pushing force of the lid (14) is reduced by the reinforcing plate (2).
1) Overall, hinge part (7) and latching device ((8), (8))
And (37), (37)), and in particular, a force is applied to the locking device serving as a movable mechanism to release the locked state.

However, a force for releasing the locked state is transmitted from the locking portions (37) and (37) of the locking plate (33) to the stoppers (8) and (8), and the stopper is moved to the storage case (8). 3) Pushing the mounting portion (W) up through the flange (F) of the inner pot (5), the inner lid (18) and the inner lid (16).
Between the stoppers (8) and (8) and the reinforcing plate (2).
1) is drawn.

That is, as the pressure in the inner pot (5) increases, the flange (F) of the inner pot (5), the inner lid (18),
Reinforcing plate (21), locking plate (33) (stopper (8)
(8)) is integrated.

However, the locking devices ((8), (8) and (3)
7) The force applied to release the locked state applied to (37)) is caused by the lock release button (10) side because one side of the reinforcing plate (21) is pivotally supported by the cooker body (1). Since the lid (14) is inclined and pushed up in a state where it is widely opened, the pivot portion (40A) moves to the pivot side of the lid (14) as shown in FIG.

With the movement of the shaft support (40A), the entire upper part of the locking plate (33) is slightly unlocked (10).
As shown in FIG. 4, the plate (A) extending to the hooks (37) and (37) is slightly inclined with respect to the stoppers (8) and (8). Department (37) (37)
And the stoppers (8) and (8) are firmly engaged with each other.

That is, as the pressure in the inner pot (5) rises, the hooks (37) and (37) are gradually hooked so as to bite into the stoppers (8) and (8). As a result, the higher the pressure, the stronger the locking state.

Then, as the rice cooking is completed and the pressure in the inner pot (5) gradually decreases, the inner lid (18) descends to its original position and the lid (14) also descends to lock the plate (14). 33) will return to the position shown in FIG.

In the state where the pressure in the inner pot (5) is increasing, the lid (1) is not removed for some reason.
4) When it becomes necessary to open the pressure release button (31) against the return spring (32),
The pressure responsive valve (45) is pressed through the transmission mechanism (25), and the inside of the inner pot (5) is communicated with the atmosphere by the pressure responsive valve to release the pressure in the inner pot (5). it can.

For this reason, the inner lid (1) is released by releasing the pressure.
8) and the lid (14) are lowered, and the locking plate (3)
The support (40A) of 3) is returned to the position shown in FIG. 1 to facilitate release of the locked state.

Here, the case where the lid (14) is opened will be described. The lock release button (1
0) is pressed against the spring (13) from above, the hook (12) rises and pushes up the engaging piece (36), and the locking plate (33) is pivoted about the shaft support (40A). Slightly turns clockwise. As a result, the plate (A) moves to the outside shown in FIG.
(37) comes off the stoppers (8) and (8).

FIG. 5 shows a structure for externally monitoring the pressure state in the inner pot (5), and this application example will be described. This is based on the fact that the locking plate (33) rotates from the state shown in FIG. 1 to the state shown in FIG. 4 as the pressure increases, and the magnet (49) is fixed to the locking plate (33). A normally open reed switch (50) is attached to a lamp substrate (48).

When the locking plate (33) in the normal state is at the position shown in FIG. 1, the magnet (49) and the reed switch (50) are close to each other and the pressure lamp (51) is turned off. . When the pressure in the inner pan (5) rises, the locking plate (3
3) is rotated to move to the position shown in FIG. 4, so that the locking state between the locking portions (37) and (37) and the stoppers (8) and (8) becomes strong, and the magnet (49) is connected with the lead. Since the switch is away from the switch (50), the reed switch is closed and the pressure lamp (51) is lit to indicate that it is in a pressure state.

[0041]

As described above, the present invention relates to a cooking device which cooks by pressure, in which a lock release button which is rotatably provided on a cooking device body and has a hook portion, and which is provided below a flange of an inner pot. A stopper, a reinforcing plate provided in the lid body, one side of which is pivotally supported by a hinge portion of the cooker main body and the other side extends to the opposite side to the hinge portion; And a crank-shaped locking plate having a locking portion below the locking portion and having a locking portion below the locking portion. To release the locking of the locking portion and the stopper.

As a result, the lid is locked in the covered state by the stopper provided below the inner pot and the locking plate pivotally supported by the reinforcing plate provided on the lid, so that the inside of the high pressure state is locked. Pot and
Since the lid above and covering the inner pot and supporting the pressure of the inner pot is integrated, the pressure in the inner pot which is applied to the hooking portion between the stopper and the hooking portion is the flange of the inner pot. Can be caught. Therefore, the locking state of the locking device is assured.

When the cover is opened, the engaging piece is actuated through the hook by the pressing operation of the lock release button, and as a result, the hooking portion between the stopper and the hook is released.
The locking portion can be released without requiring a large force.

That is, when releasing the latching portion of the lid by pushing the lock release button, the pushing pressure operation of the lock release button is directly applied to the latching portion between the stopper and the latching portion. A large force is required in the method of releasing by pressing, but as in the present invention, the pressing operation of the lock release button is operated by a member (an engagement piece) connected to the engaging portion between the stopper and the engaging portion. In the release method, the pressing force of the lock release button can be reduced by arbitrarily setting the distance between the engaging portion and the engaging piece.

Further, since the position of the pivot portion of the locking plate is located inside the position where the hook portion and the stopper are hooked, if the pressure in the inner pot increases during cooking,
With the lifting of the lid, the hooking portion goes deeper into the lower side of the stopper, and the hooking state becomes strong.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a state where pressure is not applied to a pressure cooker of the present invention.

FIG. 2 is a partial sectional view of the same.

FIG. 3 is an external perspective view of an essential part of the same.

FIG. 4 is a cross-sectional view of a main part when pressure increases from the normal state of FIG. 1;

FIG. 5 is a partial cross-sectional view of a lid showing an application example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooker main body 4 Heat source 5 Inner pan 8 Stopper 10 Lock release button 11 Operation part 12 Hook part 14 Lid 18 Inner lid 21 Reinforcement plate 33 Locking plate 34 Long hole 36 Engagement piece 37 Hook part 40 Shaft 40A Shaft support part 41 Pressure movable mechanism 42 Safety valve 44 Steam release valve F flange

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tsutomu Yamaguchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Inventor Isamu Yamazaki 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Inventor Norio Yamane 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (56) References JP-A-6-46957 (JP, A) (58) Field (Int. Cl. ⁶ , DB name) A47J 27 / 00,27 / 08

Claims (2)

(57) [Claims] 1. A cooker body containing an inner pot having a flange bent outward, an inner lid covering an opening of the inner pot and having a safety valve and a steam vent valve, and one side of the cooker body. A hinge portion provided, a lock release button rotatably provided on the other side of the cooker body opposite to the hinge portion and having a hook portion on the inside, and an outwardly located and bent below the flange. A stopper, a lid provided above the cooker main body, and a reinforcing plate provided inside the lid and having one side pivotally supported by the hinge portion and the other side extending to the opposite side to the hinge portion. An upper portion has an engaging piece protruding outward and a shaft supporting portion which is supported by the reinforcing plate on the inner side of the position of the engaging piece and has a lower portion facing the opposite side to the engaging piece. A crank-shaped locking plate having a bent locking portion, and the safety valve and the steam release valve. In the cooking in which the pressure in the inner pan is increased, the hook is raised by pushing the lock release button and the engaging piece is pushed up to release the hook between the hook and the stopper. A pressure cooker characterized in that: 2. The pressure cooker according to claim 1, wherein the position of the pivot portion of the locking plate is located inside a position where the hook portion and the stopper are hooked.