JPH027912A - Electric rice-cooker - Google Patents

Abstract

PURPOSE:To make it possible to automatically well open the lid of an electric rice- cooker with a simple operation only by providing a mechanism of the lid being locked on its main body, torsion spring by which the lid on a hinge is automatically opened when the lock is released, and a mechanism by which the hinge motion of the lid is braked. CONSTITUTION:A lid 2 is locked in the state of rice cooking by a locking mechanism which consists of a latch 22 and catching part 10a, etc., provided on a ring for housing 10. Torsion springs 28 are also provided with a hinge part 20 and the arm part 28a of each the torsion spring 28 is pressed against the reinforcing plate 29 fitted on the inner surface of the lid 2. On the other hand, the fixing part 28b of the spring 28 is inserted into the locking hole 31 provided on the reinforcing member 30 of the ring for housing 10, and pressed against its reinforcing member 30. Since these reinforcing members distribute the force owing to the springs and fix the springs, the lid 2 on a hinge has elasticity. The lid 2 on the hinge is thus opened by the elasticity when the locking mechanism is released by a button 19 for releasing the lock. The hinge motion of the lid 2 is also braked by a braking mechanism which consists of a bearing part 27 for the lid and compression springs 34, etc. It is, as a result, possible to smoothly open the lid.

Description

[Detailed description of the invention] [Industrial application fields] This invention relates to an electric rice cooker.

[Prior Art] As a conventional electric rice cooker, there is one shown in FIG. Figure 5 is a fragmented sectional view showing the outline of the configuration of a conventional electric rice cooker. In the figure, (1) is the handle, (2) is the lid, (
3) is the partition plate, (4) is the heat insulation lid, (5) is the inner pot, (6)
is the outer pot, (7) is the heater installed between the inner pot (5) and the outer pot (6), (8) is the heat shield cylinder, (9) is the sensor, (1
0) is the support frame ring, (11) is the outer case, (12> is the control panel, (13) is the cord reel, (14)
) are menu keys (15), (16) are timer buttons, (17) is a start button, (18) is a timer display section, and (19) is a lock release button.

The detailed structure of the electric rice cooker is not directly related to this invention, so it will be omitted here, but an eccentric support frame ring (10) is installed on the top surface of the main body, and an outer ring is provided near the inner circumference of the electric rice cooker. The pot (6) and the heat shield tube (8) are fixed, and the outer periphery is continuous with the upper end of the outer case (11). Further, a control panel (12) is provided on the eccentric thick wall portion of the support frame ring (10).

Fig. 6 is a diagram for explaining the opening and closing operation of the lid (2) in a conventional electric rice cooker when inserting and removing the inner pot (5) and when serving cooked rice in a rice bowl. (
As shown in A), press the lock release button (19) by hand to release the lock that secures the lid (2) and the main body.
Pull up the handle (1) around the hinge part (2o) to the stopping position and open the lid (2). Furthermore, the opened lid (2) balances itself with the weight of the lid (2) which is about to fall outward, and comes to rest at the position shown in Figure (B).

[Problems to be Solved by the Invention] Since the conventional electric rice cooker as described above is configured and operates as described above, there is a problem in that the lid cannot be opened during use. In other words, when cooking rice and serving it in a bowl, you hold the rice scoop in your right hand and the bowl in your left, so both hands are occupied and you have to open the lid beforehand before serving. . In addition, when the lid is open, the lid remains stationary due to the balance of gravity, so if you accidentally touch the lid while serving food, the balance will be lost and the lid will slam shut, causing your fingers to get caught and causing injury. There was a risk of

This invention was made to solve this problem, and even if both hands are occupied, the lid can be opened smoothly and automatically by simply pressing the lock release button, and even if both hands are occupied, the lid can be opened smoothly and automatically. The purpose is to obtain an electric rice cooker in which the lid does not suddenly close even if the lid is touched.

[Means for Solving the Problems] The electric rice cooker according to the present invention includes a locking mechanism for locking the lid to the main body, and a hinge portion connecting the lid and the main body that has an elastic force when the lock is released. It is equipped with a twisting spring to automatically rotate and open the lid, and a braking mechanism to brake the rotation of the lid.

[Operation] In this invention, when the locking mechanism for locking the lid to the main body and the hinge portion connecting the lid and the main body are unlocked, the lid is automatically rotated and opened by elastic force. Since it is equipped with a twisting spring to prevent the lid from rotating, and a braking mechanism to brake the rotation of the lid, it is possible to automatically open the lid while applying braking by pressing the lock release button, and to prevent the lid from opening accidentally. The lid will no longer suddenly close even if you touch the lid.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a cross-sectional view showing the overall structure of the electric rice cooker according to the present invention. The hinge portion (20) shown is different in configuration from the conventional electric rice cooker, and the other parts are the same as the conventional electric rice cooker, so they are omitted in the drawings.

In Fig. 1, the same reference numerals as in Fig. 5 indicate the same or equivalent parts, (21) is the spring A built in the lock release button (19), (22) is the hook, and the support frame ring ( 1
0) is provided with a hole into which the engaging portion (10a) integrally formed engages. (23) is the spring B for biasing the hook (22), (24) is the spring 1 to the collar, (25) is the spring C, and the stopper (24) is attached to the support frame ring (10). , is pushed up from below by spring C (25),
Push up the end of the hook (22) and tighten the hook (22).
The hole provided in the hole and the engaging portion (LOA) are firmly fixed. (26) is a holding plate of the stopper (24), which holds the locking mechanism laterally.

In addition, (27) is the opercular axis bone, <28) is the twist spring D, (2
9) is a reinforcing plate A, (32) is a rotary cylinder, and (34) is a compression spring E, which constitute a hinge portion (20).

FIG. 2 is a partially enlarged view showing in detail the structure of the locking mechanism shown in FIG. 1, where the same reference numerals as in FIG.
The broken line 2') indicates the position to which the hook (22) moves.

FIG. 3 is a perspective view showing the structure of each part assembling the hinge part (2o) shown in FIG. 1, where the same reference numerals as in FIG. part, (28b) is the fixing part of the twist spring (28), (30
) is a reinforcing plate B, (31) is a rotation prevention hole into which the fixing part (28b) provided on the support frame ring (1o) is fitted,
(33) is the support frame bearing shaft, (35) is the compression spring E (34)
The sliding parts (36) installed on the top are compression springs E (34)
a cylindrical hole on the support frame ring (1o) into which the (37
) is a drain hole provided in this cylindrical hole (36), (38
) is a sliding surface provided on the lid shaft bone (27), (39) is a rotating shaft, and (40) is a cover.

The lid shaft (27) is provided on the hinge part (20) inside the lid (2), and hinges D (28) are attached to both sides thereof. This twisting spring D (28) is composed of an arm part (28a) that lifts the lid (2) with elastic force, and a fixing part (28b) that is inserted into a rotation prevention hole (31). In order to prevent the arm part (28a> and fixing part (28b) of 2g) from directly contacting the resin and causing deformation, a reinforcing plate A (29) is installed inside the lid (2) and a reinforcing plate B is installed on the support frame ring (10). (30> are stored.

The rotary cylinder (32) is attached to the inside of the twist spring D (2g), and is also attached to the support frame bearing shaft (10) integrally with the support frame ring (10).
33〉 are formed, and the center of these is the rotation axis (39
) is passing through. Moreover, the compression spring E (34> is equipped with a sliding member (35) molded from plastic on its upper part, and has a cylindrical hole (35) formed on the support frame ring (10).
6), and the sliders (35) are inserted into the operculum bone (27).
) is an involute-shaped sliding surface formed on the outer peripheral surface of ( ).
38). Further, the cover (40) is installed after assembly to prevent the rotating shaft (39) from coming off.

Next, the operation will be explained. When the rice is cooked in the electric rice cooker configured as described above and is to be served in a bowl, the lock release button (19) is pressed to rotate the hook (22) as shown in Figure 2. And the hook is gold (22)
The engaging part (loa) that was engaged with the hole in
22) moves to the position indicated by the broken line (22''). When the hook (22) rotates, the stopper (24) is pushed up by the elastic force of the spring C (25), and the hook moves to the position indicated by the broken line (22'').
) is fixed at the position indicated by the broken line (22''), and even if you release your finger from the lock release button (19), the latch <22) does not return to its original position and the lock is released.

When the lock is released, the elastic force of the torsion spring D (2g) causes W (2) to rotate and open around the rotating shaft (39), and stop at a position with an opening angle of 90° to 95°.

The opening speed of this lid (2) is determined by the sliding member (35) pushed up by the compression spring E (34) and the sliding surface (3
8) The brake is applied and adjusted by friction.

In other words, the lid (2
) when rotated! (2) The opening speed becomes faster in terms of acceleration, so this is adjusted to ensure smooth movement.

FIG. 4 is a diagram explaining the operation for adjusting the opening speed of the lid (2) to iI, and in the figure (A) is n(2).
(a) shows the position of the sliding surface (38) of the opercular shaft (27) and the sliding member (35) when it has begun to open, and (B)
) shows the state when the lid (2) has almost finished opening, and (b) shows the sliding surface (38) of the lid shaft (27) and the sliding part (3) at that time.
5) is a diagram showing the position of . As shown in the figure, the sliding member (35) pushes the sliding surface (38) of the lid receiving shaft (27) by the elastic force of the compression spring E (34), and the sliding member (35) pushes the sliding surface (38) of the lid receiving shaft (27)
This braking force is applied to the surface of the support frame ring (10) and the sliding surface (38 ) Since there is a gap H between the weak < and M (2), this gap gradually becomes smaller as M (2) opens, and therefore the braking force gradually increases, and the opening speed of the lid 2) increases with acceleration. This eliminates the premature opening and allows for smooth opening and closing operations.

Expressing this in terms of the force relationship of each spring, when M(2) begins to open, twisting spring D(28)>compression pi・E(3
4), and when the canopy (2) has finished opening, the spring spring D (2g) is less than the compression spring E (34). With the structure described above, even if you tear open the lid (2) and touch it, it will not close suddenly, and when you close the lid (2), you can press the lid (2) with your hand and return it to its original position. If you return it to its position, it will automatically lock.

In addition, a drain hole (37) is formed at the bottom of the cylindrical hole (36), and a drain tray (not shown) is installed under this hole, so even if water enters the cylindrical hole during rice cooking, it will not drain. Water does not accumulate at the bottom of the hole (36).

[Effects of the Invention] As explained above, this invention allows the lid to be automatically opened while applying braking by pressing the lock release button, and also prevents the lid from suddenly closing even if the lid is accidentally touched. This has the effect of eliminating

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the general structure of the entire electric rice cooker according to the present invention, FIG. 2 is a partially enlarged view showing the detailed structure of the locking mechanism, FIG. 3 is a perspective view showing the structure of the hinge part, and FIG. 4
The figure is a diagram explaining the operation for adjusting the opening speed of the lid, Figure 5 is a broken sectional view showing the configuration of a conventional electric rice cooker, and Figure 6 is a diagram explaining the opening and closing operation of the lid in a conventional electric rice cooker. Illustration for. (2) is the lid, (5) is the inner pot, (7) is the heater, <8) is the heat shield cylinder, (10) is the support frame ring, (10a) is the engaging part, (11) is the outer case, (19) is the unlock button,
(20) is the hinge part, (21) is the spring A, (22) is the latch, (23) is the spring B, (24) is the stopper, (25) is the
) is the spring C1 (26) is the press plate, (27) is the lid bearing, (
28) is the twisting spring D, (28a) is the arm part of the twisting spring D, (28b) is the fixing part of the twisting spring D, (31) is the hole for preventing rotation, (32> is the rotating cylinder, (34) is the compression spring E , (36) is a cylindrical hole, (35) is a sliding member, (38) is a sliding surface, and <39) is a rotating shaft. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] A main body that cooks rice by heating an inner pot (5) using a heater (7) provided inside the main body, which is provided on the top surface of the main body, and whose outer periphery is the upper end of the outer case (11) of the main body. The outer pot (6
) and a heat shielding cylinder (8) provided surrounding the outer pot (6) are fixed to a support frame ring (10), which engages with the support frame ring (10) and inserts the inner pot when cooking rice. a lid (2) that covers the hole in which the rice is cooked; a locking mechanism provided on the support frame ring (10) to lock the lid (2) in the rice cooking state; and a locking mechanism provided on the support frame ring (10) to release the locking mechanism. ), the lid (2) is rotated about the rotating shaft (39) provided on the support frame ring (10) at a position opposite to the locking mechanism; A hinge part (20) for opening a hole for inserting the inner pot, a twist spring (28) is provided on the hinge part (20), and an arm part (28a) of the twist spring (28) is attached to the lid (2).
The fixing part (28b) of the twist spring (28) is pressed against the reinforcing plate A (29) attached to the inner surface of the support frame ring (10).
31) and attach the above fixing part (28) to the reinforcing plate B (30).
(b) is fixed by pressure welding while dispersing the stress to provide elastic force, and when the locking mechanism is released by the lock release button (19), the lid (2) is rotated by this elastic force. An electric rice cooker characterized by comprising: means for