JP2002262994A - Lid for rice cooking jar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a heat radiating plate set detachably attached on the lower face of the lid set of a rice cooking jar from automatically coming off even when part sizes and assembling precision are not highly maintained and to enable the heat radiating plate set to be easily attached and detached. SOLUTION: This lid for a rice cooking jar is constituted by equipping a rear engaging part and a front engaging part both to be engaged with a heat radiating plate set 9 respectively onto lower face rear part and the lower face front part of the lid set 7 and constituting the front engaging part by an engaging/disengaging structure between a movable engaging member equipped on the lid set 7 and the heat radiating plate set 9. The movable engaging member is constituted of a heat radiating plate hook 19 energized in the engaging direction to the heat radiating plate set 9. An inclined face 33 is formed on the heat radiating plate hook 19 as an operating part directly operated by a user so that the user can put a finger on the inclined face 33 to release the engagement of the heat radiating plate hook 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a rice cooker, and more particularly to a detachable structure of a heat sink set.

[0002]

2. Description of the Related Art Usually, a lid of a rice cooker is provided with a heat sink set for uniformly dissipating heat of a lid heater provided inside the lid set to a jar body side, and the heat sink set is used. It is detachable so that care can be performed by the person.

[0003] As an example of the mounting structure, a conventionally known mounting structure is provided with a front engaging portion and a rear engaging portion for a heat sink set at a lower front portion and a lower rear portion of a lid set. The joining portion is constituted by an engagement / disengagement structure of a movable engagement member provided movably in the front-rear direction and a heat sink set, and the movable engagement member is urged in an engagement direction with the heat sink set. (See, for example, JP-A-2000-14537).

In the lid having the above-described mounting structure, when the heat sink set is removed from the lid set, a pair of gripping pieces provided on the heat sink set are gripped by left and right fingertips, and the movable engagement member (a forwardly inclined member) is provided. In the case of the publication, the engagement with the radiator plate set is released against the urging force of the locking claw 23) and removed. When installing, reverse the above operation.

[0005] At the time of mounting / removing, the user only needs to grip and hold the gripping piece (similarly, the finger-hung protruding piece 21) of the heat radiating plate set to perform the mounting / removing operation. You don't manipulate it. The movable engagement member is forcibly retracted against the urging force and disengaged when mounting or removing the heat sink set. On the contrary, it moves forward by the urging force, engages with the heat sink set if it exists, and simply moves forward if it does not.

The above-mentioned publication discloses a lid hook (a hook 22 provided on the jar main body side for engaging the lid with the jar main body. The lid is operated by a user when opening the lid. ) With the movable engagement member (locking claw 2).
By locking in step 3), when there is no heat sink set, the lid hook does not engage with the movable engagement member, so that when the lid is not closed, a warning is given that the heat sink set is forgotten.

[0007]

As described above, in the conventional case, since the heat sink set is engaged with the movable engagement member, the strength of engagement of the heat sink set with the lid set is exclusively movable. This is affected by the urging force of the engaging member and the depth of the engagement. For this reason, when the strength of the engagement is too large, there is an advantage that the heat sink set does not come off without permission, but on the other hand, there is an inconvenience that a large force is required for mounting and removing. Conversely, when the engaging force is small, the heat sink set can be easily attached and detached, but there is a disadvantage that the heat sink set may be detached at high temperatures or the like.

In order to solve such a problem, it is necessary to increase the precision in manufacturing and assembling parts, and thus there is a problem that production efficiency is hindered and cost is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lid which can easily attach and detach a heat sink set, does not come off without permission, and does not require high precision.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a lid set having a rear engaging portion and a front engaging portion for a heat sink set at a lower rear portion and a lower front portion, respectively. In a lid of a rice cooker in which a front engaging portion is constituted by an engaging and disengaging structure of a movable engaging member provided on the lid set and a heat radiating plate set, the movable engaging member is engaged with the heat radiating plate set in an engaging direction. Composed of heat sink hooks biased to
The heat sink hook has a configuration in which an operation unit directly operated by a user is provided.

According to the above configuration, when removing the radiator plate set, the user operates the radiator plate hook by putting a finger on the operation section to release the engagement with the radiator plate set and remove it. When mounting, the rear part of the heat sink set is first engaged with the rear engaging part, and then the front part is engaged with the heat sink hook of the front engaging part.

Further, a configuration can be adopted in which the heat sink hook is swingably or slidably attached to the heat sink set.

The operating section has an inclined surface inclined inward of the lid set, and the inclined surface serves as a finger hook when removing the heat sink set and a guide part when attaching the heat sink set. A configuration can be employed. By adopting such a configuration, when removing the heat sink set, there is the convenience that you can operate it by putting your finger on the inclined surface of the heat sink hook, and when installing the heat sink set, guide the above inclined surface It can be easily installed while sliding as a part.

Further, when the heat sink set is attached to the lid set, the gap between the holding piece provided on the heat sink set and the lid set is such that the holding piece cannot be gripped. It is also possible to adopt a configuration limited to According to this configuration, it is possible to prevent a finger from being erroneously hooked on the holding piece when removing the heat sink set, and at the same time, it is possible to prompt the operation of releasing the engagement by operating the heat sink hook.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the rice cooker according to the embodiment has a jar main body 1 and a lid 2 attached to the jar main body so as to be openable and closable, and an operation / display unit 3 is provided on a front surface of the jar main body 1. , A hook release button 4 and a steam port set 5 are attached. As shown in FIG. 2, the shuttle 6 is housed inside the jar main body 1 so as to be freely taken in and out. As shown, the lid 2 includes a lid set 7 attached to the jar body 1 and a heat sink set 9 detachably attached to an attachment recess 8 on the lower surface thereof.

As shown in FIGS. 2 and 3, the radiator plate set 9 includes a radiator plate 11 made of a metal plate, a radiator plate ring 12 attached to an outer peripheral edge thereof, and the radiator plate 11 and the radiator plate. And a packing 13 sandwiched by the ring 12. The heat radiating plate 11 has a function of radiating the heat of the lid heater 14 mounted inside the lid set 7 to the pot side. On both sides of the rear portion (on the hinge shaft 10 side) of the heat sink ring 12, rear engagement projections 15 and 15 projecting at right angles are provided, and a front engagement projection is provided at the front center. 16 are provided. Grip pieces 17, 17 are provided on both sides of the front engagement projection 16.
Is provided.

On the other hand, in the inner peripheral portion of the mounting recess 8 provided on the lower surface of the lid set 7, the rear engaging projections 15, 15 are received at the rear edge of the hinge shaft 10 side. Rear engagement portions 18 are provided so as to be freely engaged and disengaged (see FIGS. 2 and 4). Further, a heat sink hook 19 is attached to the center of the front edge, and is engaged with the front engagement projection 16 so as to be detachable. Further, recesses 21 and 21 for receiving the gripping pieces 17 and 17 are provided on both sides of the heat sink hook 19.

The heat sink hook 19 is shown in FIGS.
As shown in the figure, the cover 2 is disposed in a recess 24 provided at an intermediate portion of the cover hook 23 for engaging the jar body 1.
Then, the support shaft 25 of the lid hook 23 is
The heat sink hook 19 is supported so as to be swingable in the front-rear direction. Both ends of the support shaft 25 are inserted into and supported by mounting holes 28 provided in the reinforcing member 27 of the lid set 7 (see FIGS. 6 and 7). Further, the wire spring 26 is penetrated slightly below the position where the support shaft 25 penetrates the heat sink hook 19. The wire spring 26 is bent backward, and both ends of the wire spring 26 are inserted into mounting holes 30 provided in the front end of the lid body 31 (see FIGS. 6 and 7). This allows
The heat sink hook 19 is urged inward. Note that FIG.
6 and 7, reference numeral 29 denotes a biasing spring of the lid hook 23.

As shown in FIG. 5, the heat sink hook 19 is provided with a hook-shaped portion 3 which is engaged with the front engagement protrusion 16 described above.
2 so that the engagement depth with the front engagement projection 16 can be sufficiently secured. In addition, the hook 3
The opposite surface (lower surface) of 2 is an inclined surface 33. The inclined surface 33 serves as an operation portion on which a user puts a finger when operating the heat sink hook 19 in the disengagement direction, and also serves as a guide portion when attaching the heat sink set 9.

The rice cooker of the embodiment is as described above, and the lid 2 is connected to the jar main body 1 by the lid hook 23 described above.
When the hook release button 4 is operated, the engagement of the lid hook 23 is released, and the lid 2 is hinged (not shown).
Is automatically opened by the action of. As described above, the radiator plate set 9 has the rear engaging protrusions 15, 15 engaged with the rear engaging portions 18, 18 of the lid set 7, and the front engaging convex portion 16 has the heat sink hooks. It is attached in a state where it is engaged with 19. The heat sink hook 19 is engaged with the front engaging projection 16 by its deep hook 32, and the wire spring 2
The engagement is performed with the required engagement strength by the urging force of No. 6, and the engagement force does not come off without permission.

When removing the radiator plate set 9, put a fingertip on the inclined surface 33 of the radiator plate hook 19 and operate it outward to elastically deform the wire spring 26 (see the two-dot chain line in FIG. 6). Is pivoted outward (see the two-dot chain line in FIG. 5), and the hook 32 is disengaged from the front engaging projection 16. Then, the gripping pieces 17, 17 are gripped and removed. In this case, the hook 3
2 is disengaged from the front engaging projection 16,
3 (see the two-dot chain line in FIG. 3), the steam passage 3 provided inside the lid set 7.
4 is pressed against the upper surface of the heat sink 12. The lid set 7 is pushed out by the elasticity of the packing 35.

As shown in FIG. 8, in order to prevent the holding pieces 17, 17 from being directly removed without removing the radiating plate set 9 without operating the radiating plate hooks 19, as shown in FIG. By limiting the gap a in the surface direction of the heat sink 12 and the gap b in the thickness direction between the gripping piece 17 and the recess 21 to a size that does not allow a fingertip to enter, the gripping piece 1
7, 17 cannot be grasped with a fingertip.

When attaching the heat sink set 9, first, the rear engaging projections 15, 15 are connected to the rear engaging portions 18, 18, respectively.
After that, the front end of the front engagement projection 16 is retracted outward while sliding the inclined surface 33 of the heat sink hook 19 as a guide, and is engaged with the hook 32.

In the above case, the heat sink hook 19 is swingably attached to the support shaft 25, but as another structure, as shown in FIGS. 9 (a) and 9 (b), it is slidable in the front and rear direction. May be attached. Heat sink hook 19 in this case
a has a hook-shaped portion 32 and an inclined surface 33, and is urged by a wire spring 26 in the same manner as described above. The front and rear guide grooves 37 are provided so as to be slidably supported. In this case, the heat sink hook 19a slides in the front-rear direction as shown by a two-dot chain line in FIG.

In another example shown in FIGS. 10 (a) and 10 (b), a heat sink hook 19b is formed in an L-shape, and its distal end is supported by a shaft 38 so as to be swingable in the left-right direction. The distal end portion is engaged with the lower part of the part engaging projection 16. The heat sink hook 19b is urged in the forward direction by a spring 39, and the user puts his / her fingertip on the operation part 41 and retreats as shown by a two-dot chain line, so that the front engagement projection 1
6 is released.

In the other examples shown in FIGS. 11A and 11B, the heat sink hook 19c is slidably provided on the side of the front engaging projection 16. In this case, the guide is guided by a left-right guide groove 37 'provided in the lid set 7 and is urged by a spring 39'.

[0027]

As described above, according to the present invention, the heat sink set is engaged by the heat sink hook provided on the lid set, and the user engages with the operation part provided on the heat sink hook by placing a finger on the operation part. Since the engagement is released, the engagement can be easily released even if the engagement is relatively strong. For this reason, the heat sink set can be securely engaged with the lid set even if the size of the components and the assembling accuracy thereof are not as high as the left. In addition, the operation of attaching and detaching is easy,
Also, the heat sink can be prevented from coming off without permission even at high temperatures.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 is a cross-sectional view of the lid.

FIG. 4 is a bottom view of the lid.

FIG. 5 is a partial cross-sectional view of the lid.

FIG. 6 is a partial plan view of a heat sink hook portion of the above.

FIG. 7 is an exploded perspective view of a heat sink hook part of the above.

8 is a sectional view taken along line VIII-VIII in FIG.

9A is a cross-sectional view of a modified example of a heat sink hook portion, and FIG. 9B is a cross-sectional view taken along line bb in FIG. 9A.

10A is a bottom view of another modified example of a heat sink hook portion, and FIG. 10B is a front view of FIG.

11A is a bottom view of another modification of the heat sink hook portion, and FIG. 11B is a front view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jar main body 2 Lid 3 Operation / display part 4 Hook release button 5 Steam port set 6 Hook 7 Lid set 8 Mounting recess 9 Heat radiating plate set 10 Hinge shaft 11 Heat radiating plate 12 Heat radiating plate ring 13 Packing 14 Heater 15 Rear engaging convex Part 16 Front engaging projection 17 Grip piece 18 Rear engaging part 19, 19a, 19b, 19c Heat sink hook 21 Depression 23 Cover hook 24 Depression 25 Support shaft 26 Wire spring 27 Reinforcement member 28 Mounting hole 29 Energizing Spring 30 Mounting hole 31 Lid body 32 Key-shaped part 33 Inclined surface 34 Steam passage 35 Packing 36 Projection for sliding 37, 37 'Guide groove 38 Shaft 39, 39' Spring 41 Operating part

Claims (4)

[Claims] 1. A movable engagement member having a rear engagement portion and a front engagement portion with respect to a heat sink set provided on a lower surface rear portion and a lower surface front portion of a lid set, and a front engagement portion provided on the lid set. In the lid of a rice cooker configured with a structure for engaging and disengaging from a heat sink set, the movable engaging member is constituted by a heat sink hook biased in an engagement direction with the heat sink set, and used for the heat sink hook. A rice cooker jar provided with an operation section directly operated by a user. 2. The lid of the rice cooker according to claim 1, wherein the heat sink hook is swingably or slidably attached to the heat sink set. 3. The operation unit is formed by an inclined surface inclined inward of the lid set, and the inclined surface serves as a finger hook when removing the heat sink set and a guide part when attaching the heat sink set. The lid of the rice cooker according to claim 1 or 2, wherein: 4. When the heat sink set is attached to the lid set, the gap between the holding piece provided on the heat sink set and the lid set is such that the holding piece cannot be held. The lid of a rice cooker according to any one of claims 1 to 3, wherein the lid is limited to: