JP2004065560A - Lid hook structure of rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate rice cooking with pressure by improving the strength of a lid hook in a lid hook structure which locks a lid by engaging the lid hook formed at the lid to a jar main body. <P>SOLUTION: The hook part 9 of the lid hook is formed of a plate hook base part 11 extending downward and pawl parts 12 at the lower end of the hook base part 11. The pawl parts 12 are constituted by bending protrusions formed by making both of the sides of the hook base part 11 project to the right and left inward and making them erect with respect to the hook base part 11. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lid hook structure of a rice cooker (including a rice cooker).
[0002]
[Prior art]
Conventionally, in order to lock the lid which can be freely opened and closed on the rice cooker main body to the rice cooker main body, a lid hook has been conventionally attached to the lid so as to be swingable by a mounting shaft, and the hook portion of the lid hook is hooked on the rice cooker main body. A lid hook structure is employed in which the lid is locked by engaging the receiving part with a required urging force, and the lid is unlocked by disengaging the hook part by operating a lock release button provided on the lid. (See, for example, JP-A-8-322720). In the structure of the hook portion having the above structure, a plate-like hook base extending downward from the mounting shaft and a lower end portion of the hook base are bent into an L shape by 90 degrees to form a claw portion.
[0003]
[Problems to be solved by the invention]
In a pressure rice cooker, the pressure at the time of cooking rice acts as a load on the hook part via the lid, and in the conventional hook structure, the strength of the claw part is determined by the thickness of the material, so that the cost etc. When the thickness and the material cannot be changed from the viewpoint of the above, there is a concern that the strength is insufficient. Further, the lower surface of the claw portion bent in an L-shape tends to be hooked on the hook receiving portion when the lid is closed, and there has been a problem that the lid is not smoothly closed.
[0004]
Accordingly, it is an object of the present invention to provide a lid hook structure in which the strength of the above-mentioned claw portion is increased and the lid can be smoothly closed when the material and the thickness are made conventional.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a lid hook that is swingably attached to a lid by a mounting shaft, and a hook portion of the lid hook is engaged with a hook receiving portion of the rice cooker body with a required urging force. The lid is unlocked by operating a lock release button provided on the lid to unlock the lid by unlocking the lid. A hook is formed by a plate-shaped hook base extending downward from the hook base and a claw at the lower end of the hook base. In contrast, an upright configuration was adopted.
[0006]
According to the above configuration, since the strength of the claw portion is determined by the width in the vertical direction, the material and its thickness are assumed to be constant as compared with the conventional case, and the width is set to be sufficiently large. Thus, the strength can be increased.
[0007]
In addition, if a configuration is employed in which a vertical reinforcing rib is formed by bending the material of the hook base at the center in the width direction of the hook base, the strength of the hook base can be increased.
[0008]
In addition, if a configuration in which a tapered portion that becomes higher in the direction of the tip is provided at the lower end side of the hook claw portion is adopted, the hook claw portion does not catch on the hook receiving portion when the lid is closed, so the lid is closed smoothly. can do.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the rice cooker according to the embodiment has a lid 3 attached to a rear portion of a jar main body 1 by a hinge shaft 2 so as to be freely opened and closed. A lid hook 5 is swingably mounted inside the open end of the lid 3 by a mounting shaft 4. The lid hook 5 has a spring receiving arm 7 protruding rearward from a shaft insertion portion 6 fitted to the mounting shaft 4, and has a lock release arm 8 protruding forward. Further, hook portions 9, 9 are provided on both sides of each of the arms 7, 8.
[0010]
Each of the hook portions 9 includes a plate-shaped hook base 11 extending downward from the shaft insertion portion 6 and a pair of claw portions 12 provided at a lower end thereof. As shown in FIG. 4, the hook base 11 is provided with a reinforcing rib 13 which is bent at the center in the width direction so as to protrude outward in a mountain shape. As shown in FIG. 4 (a), each of the claws 12 is provided at the lower end portion of the hook base 11 so as to protrude in the left-right direction, and is bent inward at a right angle as shown by the arrow in FIG. Thus, the hook base 11 is erected at right angles to the inner surface. A tapered portion 14 (see FIG. 4B) that becomes higher toward the tip is provided at the lower end side of each claw portion 12. The lid hook 5 is urged by a spring 10 in the locking direction of the lid 3.
[0011]
On the other hand, a lock release button 15 is provided at the front end of the jar body 1. The lock release button 15 is provided at the front of a window hole 16 (see FIG. 3) where the tip of the lock release arm 8 faces, and is supported by a shaft 17 as shown in FIG. Urged in the return direction. When the lock release button 15 is operated, the rear end is partially inserted into the window hole 16 (see the two-dot chain line in FIG. 2), and the lid hook 5 is rotated in the lock release direction.
[0012]
Below the lock release button 15, the jar body 1 is provided with a pair of left and right hook receiving portions 19, 19 as viewed from the front. In each of the hook receiving portions 19, a reinforcing plate 21 made of a metal plate is superimposed on an upper surface of a flat rectangular hole opened forward. As shown in FIG. 6B, the reinforcing plate 21 has a width in the left-right direction across the left and right hook receiving portions 19, and the inner side forms an arc along the inner periphery of the rice cooking section of the jar body 1. . A guide member 23 having tapered guide surfaces 22, 22 is fixed to the upper portions of the hook receiving portions 19, 19, respectively. The guide surface 22 is pressed against the tapered portion 14 of the claw portion 12 of the cover hook 5 (see FIG. 5A), the cover hook 5 is slightly retracted outward, and the claw portion 12 is moved to the hook receiving portion. 19 (see FIG. 3B).
[0013]
The rice cooker according to the embodiment is as described above. When the hook release button 15 is pushed in the locked state (see FIG. 1) with the lid 3 closed, the rear end is partially inserted into the window hole 16. Then, the lid hook 5 is rotated in the unlocking direction (see the two-dot chain line in FIG. 2). As a result, the lock release arm 8 is pushed in, and the lid hook 5 is rotated as a whole (see the two-dot chain line in FIG. 2), so that the claw portion 12 comes off the hook receiving portion 19 and the lid 3 is unlocked. You. When the lock is released, the lid 3 is opened by the force of the hinge spring 24.
[0014]
Conversely, when the lid 3 is pressed down and closed, the claw portion 12 of the hook portion 9 rests on the guide surface 22 (see FIG. 5A) and receives an outward force from the guide surface 22 (FIG. 5). (A) See two-dot chain line). When it is pushed down as it is, the claw portion 12 is engaged with the hook receiving portion 19 to lock the lid 3. When the pressure of cooked rice acts on the lid 3 in the locked state of the lid 3, the pressure is supported by the two hook portions 9.
[0015]
The hook portion 9 is provided with the reinforcing rib 13 on the hook base portion 11, and the strength of the two claw portions 12, 12 is determined by the vertical width w (see FIG. 4B). By having such strength, the pressure at the time of cooking rice can be sufficiently supported.
[0016]
【The invention's effect】
As described above, according to the present invention, even when the lid hook is made of the same material as in the conventional case, and the width of the hook base is set similarly to the conventional case, the hook base and the claw have high strength. Therefore, it can withstand pressure cooked rice sufficiently. Further, by providing the tapered portion on the lower side of the claw portion, the claw portion can be smoothly guided to the hook receiving portion when the lid is closed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a first embodiment. FIG. 2 is an enlarged cross-sectional view of a lid hook part of the same. FIG. 3 is a partially cutaway perspective view of the lid. FIG. 4 (a) is a perspective view of a hook part. (B) Side view of hook portion (c) Rear view of hook portion (d) Cross-sectional plan view of hook portion (FIG. 5) (a) Cross-sectional view before locking of lid hook (b) Cross-section in locked state of lid hook FIG. 6 (a) is a plan view of a hook receiving portion of a jar main body. FIG. 6 (b) is a partially cutaway perspective view of FIG. 6 (a). FIG. 6 (c) is a cross-sectional view taken along line cc in FIG. Description]
1 Jar body 2 Hinge shaft 3 Lid 4 Mounting shaft 5 Lid hook 6 Shaft insertion part 7 Spring receiving arm 8 Lock release arm 9 Hook part 10 Spring 11 Hook base 12 Claw part 13 Reinforcement rib 14 Taper part 15 Lock release button 16 Window hole 17 Shaft 18 Spring 19 Hook receiving portion 21 Reinforcement plate 22 Guide surface 23 Guide member 24 Hinge spring

Claims (3)

The lid hook is swingably attached to the lid by a mounting shaft, the hook portion of the lid hook is engaged with the hook receiving portion of the rice cooker body with a required urging force to lock the lid, and the lock provided on the lid is released. In a lid hook structure of a rice cooker in which a hook is released by operating a button to release a lock of a lid, a plate-like hook base extending the hook downward from the mounting shaft, and the hook A lid for a rice cooker, which is formed by a claw portion at a lower end portion of a base portion, and the protrusion portion formed by projecting the claw portion to the left and right sides on both sides of the hook base portion is bent inward to stand on the hook base portion. Hook structure. 3. The lid hook structure of a rice cooker according to claim 2, wherein a vertical reinforcing rib is formed by bending a material of the hook base at a central portion in a width direction of the hook base. The lid hook structure of a rice cooker according to claim 1 or 2, wherein a tapered portion that becomes higher in the direction of the tip is provided at a lower end side of the hook claw portion.

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