JPH027911A - 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 springs 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 hor housing 10. When the locking mechanism is released by a button 19 for releasing the lock, the lid 2 on a hinge is also opened by the elastic force of torsion springs 28 provided with a hinge part 20. Furthermore, by a braking mechanism which consists of a bearing part 27 for the lid and compression springs 34, etc., the opening speed of the lid 2 is braked according to an opening angle of the lid 2. As a result, it is possible to automatically well open the lid only with a simple operation that a button 19 for releasing the lock is pushed even if both hands are engaged and it does not happen that the lid is suddenly closed even if the open lid is touched by mistake.

Description

[Detailed description of the invention] [Industrial application field] 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, (
lO) is the support frame ring, (11) is the outer case, (12)
is the control panel, (13) is the cord reel, (1
4) is a menu key (15), (16) is a timer button, (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 M (2) and the main body.
Open the lid (2) by pulling up the handle (1) around the hinge (20) until it stops. It will balance itself and come 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 part (20) is different in configuration from a 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 a spring B for urging the hook (22), (24) is a stopper, (25) is a spring C, and the stopper (24) is attached to the support frame ring (lO) from below. It is pushed up by a spring C (25), and the hook pushes up the end of the metal (22) and firmly fixes the hole provided in the metal (22) and the engaging part (10a). There is. (26) is a holding plate of the stopper (24), which constitutes a locking mechanism.

Also, (27) is the lid bearing, (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 (20) 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 (10) 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 (37) on the support frame ring (10) into which the
) 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 axis (27) is provided on the hinge part (20) inside the lid (2), and twist springs 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 28) 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) is attached.

The rotary cylinder (32) is attached to the inside of the twist spring D (28), and is also attached to the support frame bearing shaft (10) integrally with the support frame ring (lO).
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 attached after the assembly is completed 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 (10a) that was engaged with the hole of
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 (22) is rotated.
) is fixed at the position indicated by the broken line (22°), and even if you release your finger from the lock release button (I9), the latch (22) will not return to its original position and the lock will be released.

When the lock is released, the lid <2) rotates and opens around the rotating shaft (39) due to the elastic force of the twisting spring D (28), and stops 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.

That is, M(
2), the opening speed of the lid (2) increases in terms of acceleration, so this is adjusted to ensure smooth movement.

Figure 4 is a diagram explaining the operation for adjusting the opening speed of the lid (2). In the figure, (A) is the state where the lid (2) has begun to open, and (a) is the lid axis bone at that time. (27) shows the position of the sliding surface (38) and the sliding member (35), (B)
(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 (35) at that time.
) is a diagram showing the position of As shown in the figure, sliding H(
35) is rotated by the elastic force of the compression spring E (34).
The sliding surface (38) of 27) is pressed to apply a brake to the rotation of the lid holder shaft (27), but this braking force! !
(2) begins to open, that is, the state shown in Figure (a), there is a gap of H between the surface of the support frame ring (10) and the sliding surface (38), so the lid (As the lid (2) opens, this gap gradually becomes smaller, and therefore the braking force gradually becomes stronger, canceling out the acceleration of the opening speed of the lid (2) and ensuring smooth opening/closing operation. I have to.

Expressing this in terms of the force relationship of each spring, when the lid (2) is just beginning to open, twisting spring D (2g) > compression spring E (34
), and when M(2) is fully opened, twisting spring D(28)<compression spring E(34). With the structure described above, even if you accidentally touch the open lid (2), it will not close suddenly, and when you want to close the lid (2), press it with your hand to return it to its original position. If you do this, 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 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, and FIG. 3 is a perspective view without showing the structure of the hinge part. Fourth
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 pressing plate, (27) is the lid bearing, (
28) is a twisting spring D, (32) is a rotating cylinder, (34> is a compression spring E, 36) is a cylindrical hole, (35) is a sliding surface, (
38) Sliding surface, (39) is the 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 upward using the rotation shaft (39) provided on the support frame ring (10) as a fulcrum at a position opposite to the locking mechanism; A hinge part (20) for pushing up to open a hole for inserting the inner pot, and a hinge part (20) for rotating the lid (2) with elastic force when the locking mechanism is released by the lock release button (19). The above hinge part (2
0), and a compression spring (34) provided to brake the rotational speed of the lid (2) as the opening angle of the lid (2) changes. Electric rice cooker.