JPH062618Y2 - rice cooker - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention provides a lid that can be opened and closed on the upper part of the main body via a hinge, and the lid is biased by a spring when the clamp is unlocked. Relates to a rice cooker that automatically opens.

(Prior Art) In the conventional device of this type, a lid provided on the upper portion of the main body of the container so as to be openable and closable via a hinge portion urges a lid toward an open side by a spring and clamps against the urging force of the spring. The lid is configured to be fixed in a closed state by the portion, and the lid is automatically opened by the spring bias when the lock of the clamp portion is released, so that the lid is easily handled.

As described above, in the one in which the lid is automatically opened by utilizing the spring bias, it is configured to prevent the vessel main body from becoming unstable due to the reaction when the lid is opened vertically.
For example, a first coil spring having a strong biasing force and a second coil spring having a weak biasing force are used as the lid opening spring, and the lid is suddenly opened to a predetermined angle by the first coil spring when the clamp portion is unlocked. It is known that the lid is loosely opened by a second coil spring.

(Problems to be Solved by the Invention) In the above-mentioned conventional technique, since it is necessary to assemble a coil spring having two kinds of urging force of strong and weak, a space for spring assembly becomes large and the lid completes opening. There is a problem that it takes time until. Therefore, it is conceivable to restrain the recoil when the lid is opened by elastically contacting the opening receiving spring with the spring receiving portion in a state where the lid is opened by the opening spring and is almost opened. However, in such a case, it is expected that a frictional noise is generated due to the contact between the spring and the spring receiving portion when the contact between the opening suppressing spring and the spring receiving portion is poor.

Therefore, an object of the present invention is to provide a rice cooker capable of preventing recoil and friction noise when the lid is opened.

[Structure of the Invention] (Means for Solving the Problem) The present invention provides a lid 7 that can be opened and closed via a hinge portion 8 on the upper part of the main body 1 of the device, and a spring 9 for opening when the clamp portion 10 is unlocked. In the rice cooker that automatically opens the lid 7 by urging, a spring receiving portion 61 is provided on the hinge portion 8 side of the main body 1 of the rice cooker, and the lid 7 is brought into contact with the spring receiving portion 61 so that the lid opening force is increased. An opening suppressing spring 63 that spontaneously suppresses is provided, and a portion of the opening suppressing spring 63 that comes into contact with the spring receiving portion 61 is formed on a surface 72 having a small friction coefficient.

(Operation) With the above configuration, when the lid 7 is almost opened by the urging of the opening spring 9 when the clamp portion 10 is unlocked, the opening restraining spring 63 comes into contact with the spring receiving portion 61 and the opening force of the lid 7 is reduced. Suppressed sporadically. Further, the surface 72 having a small coefficient of friction formed on the release suppressing spring 63 prevents the generation of friction noise due to the contact between the release suppressing spring 63 and the spring receiving portion 61.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 7, reference numeral 1 denotes a container body, which has an outer case 3 made of synthetic resin and an inner case 4 made of metal, which are joined by an upper frame body 2. A heat insulator 5 is interposed between the inner case 4 and the inner case 4, and a container 6 is housed in the inner case 4. 7 is a hinge part 8 on the upper part of the container body 1.
It is a lid made of synthetic resin which can be opened and closed by means of the opening coil spring 9 and is biased to the opening side by the opening coil spring 9 and can be fixed by the clamp part 10. A plate-shaped lower surface plate 11 is attached by screws 12, and a lid heater 13 is provided on the upper surface of the lower surface plate 11. Reference numeral 14 is a steam outlet provided to connect the lid 7 and the lower plate 11 to each other. Reference numeral 15 denotes a stud projectingly provided in the lower central portion of the lower plate 11, and an inner lid 17 is hung from the stud 15 via a bush 16. The inner lid 17 is provided on the entire circumference of the upper portion of the container 6. The opening portion of the upper surface of the container 6 can be elastically closed by pressure contact with the stepped receiving portion 18 formed. Reference numeral 19 denotes an annular packing, which is sandwiched and fixed between the lower surface of the lid 7 and the peripheral portion of the lower surface plate 11, and is closely attached to the flange portion 20 provided on the entire upper end of the container 6 to form the lid 7. The space between the container 6 and the container 6 is sealed. Reference numeral 21 denotes a cup-shaped heat sensitive portion provided at the center of the bottom portion of the inner case 4, a temperature sensor 22 is provided inside the heat sensitive portion 21, and the heat sensitive portion 21 is a spring when the container 6 is accommodated. It is elastically pressed against the outer bottom of the container 6 by the bias of 23 and
The container detection switch 24 is operated by descending against the bias of 23. 25 is a rice cooking heater provided on the inner bottom of the inner case 4,
Reference numeral 26 is a heat retaining heater provided on the outer surface of the inner case 4. The lid 7 has a hollow structure having a lower lid 27 and an upper lid 28, and a protective case 29 is provided in the hollow portion. The protective case 29 is formed by connecting an upper case 30 and a lower case 31 formed of transparent synthetic resin in a watertight state with screws 33 with an annular packing 32 interposed therebetween.
An electronic circuit unit 36 that forms a display unit 34 including an LCD and an LED and an operation unit 35 including a plurality of switches is housed and fixed therein.

A clamp button 37 made of synthetic resin is provided on the upper surface of the lower lid 27 so as to be vertically movable along a guide wall 38, and the clamp button 37 is formed on the upper lid 28 by being urged upward by a spring 39. Claw piece 41 that is projected from the hole 40 and is integrally formed with the clamp button 37 in this state.
It is locked to the engaging portion 42 formed on the. A hole 43 is formed in the lower lid 27 at a lower portion of the clamp button 37, and an upper portion of the metal clamp member 44 inserted into the hole 43 is rotated on the upper surface of the lower lid 27 via a support shaft 45. The clamp member 44 is movably supported, and the clamp member 44 includes a spring 46 externally fitted to the support shaft 45.
Is urged inward. Further, a recess 47 for inserting the clamp member 44 is formed in the upper frame body 2, and a locking projection 49 for locking the engaging portion 48 of the clamp member 44 is formed on the inner side surface of the recess 47. On the bottom surface of the concave portion 47, a receiving body 51 biased upward by a spring 50 is provided so as to be vertically movable, and is locked by a stopper portion 52 at a predetermined height. When the lid 7 is closed against the bias of the opening coil spring 9, the lid 7 is closed.
Side clamp member 44 is inserted into the recess 47 on the main body 1 side, and the receiving body 51 is pushed down against the bias of the spring 50, and the engaging portion 48 of the clamp member 44 is locked on the upper frame 2 side. The projection 49 is engaged and fixed. On the other hand, when the clamp button 37 is pressed, the clamp button 37 descends and becomes flush with the upper surface of the upper lid 28, and further descends to a position where the clamp button 37 is retracted into the hole 40, and a receiving piece bent and formed on the upper end of the clamp member 44. 53 is pushed by the clamp button 37, whereby the clamp member 44 rotates outward with the support shaft 45 as a fulcrum against the bias of the spring 46, and the engaging portion 48 of the clamp member 44 locks. The cover 7 is released from 49, and the lid 7 is opened by the biasing force of the opening coil spring 9.

The hinge portion 8 for opening and closing the lid 7 on the container body 1 has four support pieces 54 provided on the rear side of the upper frame body 2 so as to project upward with a space between each of them. A pair of support cylinders 55 are horizontally projected on the lid 27 corresponding to the support pieces 54,
Each support cylinder 55 is pivotally mounted by a shaft 56 in a state of being inserted into the two support pieces 54 on both sides. In this case, the support cylinder 55 is formed by the left and right side portions 55A and the lower curved portion 55B.
Reference numeral 56 is inserted through the left and right side portions 55A. Further, an opening coil spring 9 is externally fitted to each shaft 56 between the left and right side portions 55A via a sleeve 57, and one end of the opening coil spring 9 is attached to the lid 7 side via a stop hill 58. And the other end is fixed to the upper frame body 2 side through the uphill 59 to apply an urging force in the opening direction to the lid 7. Also, two of the four support pieces 54 on the inner side are supported. The inner side of the piece 54 is connected by the wall surface 60 to form the spring receiving portion 61. A spring mounting portion 62 is formed on the lower lid 27 so as to correspond to the inside of the spring receiving portion 61, and a leaf spring 63 for restraining opening is fixed to the spring mounting portion 62. In the opening restraining leaf spring 63, the upper end horizontal portion 64 has a positioning hole formed in the upper end horizontal portion 64 with a positioning protrusion 65 protruding from the spring mounting portion 62.
It is fixed by screws 67 in a state of being fitted to 66. Further, the opening restraining leaf spring 63 is bent at the end of the upper end horizontal portion 64 on the side of the spring receiving portion 61 as a curved portion 68 directed downward, and further downwardly formed with a vertical portion 69 and an inclined portion 70 facing the spring receiving portion 61 side. Are continuously formed. Further, a polyester film 71 is attached to the outer surface of the inclined portion 70 which is a surface in contact with the spring receiving portion 61 to form a surface 72 having a small friction coefficient. And the clamp part
When the lid 10 is unlocked, the lid 7 is automatically opened by the urging of the opening coil spring 9, and when the lid 7 is almost opened, the opening restraining leaf spring 63 comes into contact with the spring receiving portion 61 and elastically releases the lid 7. Suppress to.

When the clamp button 37 is pushed and the clamp member 44 is rotated through the receiving piece 53 as shown by the chain double-dashed line in FIG. 6 and disengages from the locking projection 49, the lid 7 opens. When the lid 7 is almost opened as shown in FIG. 2, the inclined portion 70 of the leaf spring 63 for restraining the opening provided on the lid 7 is at the upper part. The spring receiving portion 61 formed on the frame body 2 is elastically contacted to give a force to close the lid 7, whereby the lid 7 is slowly and automatically opened and cooked in this state. Rice can be served in a bowl. Further, when the container 6 is inserted into or removed from the container body 1 and the lid 7 is further opened to the position shown in FIG.
It slides elastically in contact with and is stably supported in the fully opened state shown in FIG. In this case, since the polyester film 71 is adhered to the inclined portion 70 of the leaf spring 63 for restraint of opening to form the surface 72 having a smooth surface and a small friction coefficient, the friction noise caused by the contact between the surface 72 and the spring receiving portion 61. Can be prevented.

As described above, in the above embodiment, the lid 7 is automatically opened by the urging of the opening coil spring 9 when the clamp 10 is unlocked, and the opening restraining leaf spring 63 elastically contacts the spring receiving portion 61. Since the opening by the spring urging is gently completed by the above, the assembling space of the springs 9 and 63 can be made relatively small and the lid 7 can be made relatively small as compared with the conventional one using strong and weak coil springs. The opening time of is also shortened. Further, since the surface 72 having a small friction formed on the opening suppressing leaf spring 63 can prevent a friction noise due to the contact between the leaf spring 63 and the spring receiving portion 61, the lid 7 can be opened and closed quietly. Since the lid 7 can be almost opened and then manually opened to the fully opened state,
It is convenient because the lid opening angle can be freely adjusted according to the user's preference.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, as a means for forming a surface having a small friction coefficient on the release suppressing leaf spring, formation of a coat layer such as a fluorine resin coating or surface treatment may be appropriately performed.

[Advantage of the Invention] The present invention relates to a rice cooker in which a lid is opened and closed via a hinge part on the upper part of the main body of the rice cooker, and the lid is automatically opened by urging an opening spring when the clamp part is unlocked. A spring receiving portion is provided on the hinge portion side of the container body, an opening suppressing spring is provided on the lid to elastically suppress the lid opening force, and the spring receiving portion of the opening suppressing spring is provided. By forming the portion that comes into contact with the portion on the surface having a small friction coefficient, it is possible to provide a rice cooker that can prevent recoil and frictional noise when the lid is opened.

[Brief description of drawings]

1 to 7 show a first embodiment of the present invention, wherein FIG. 1 is an overall sectional view, FIG. 2 is a sectional view showing a completed state of opening by spring bias, and FIG. 3 is a manual operation. Sectional views showing the opened state, FIGS. 4 and 5 show the assembled state of the hinge portion, the opening spring and the opening restraining spring, FIG. 4 is a partially cutaway perspective view, FIG. 5 is a front view, and FIG. 6 and 7 show the clamp part, FIG. 6 is a sectional view, and FIG. 7 is an exploded perspective view. 1 ... Instrument main body 7 ... Lid 8 ... Hinge part 9 ... Opening coil spring (opening spring) 10 ... Clamping part 61 ... Spring receiving part 63 ... Opening suppressing leaf spring (opening suppressing spring) 72 ... Small friction coefficient surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuhide Horiuchi 1-1-1 Shibaura, Minato-ku, Tokyo Inside Toshiba Head Office (56) Reference JP-A-3-16516 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A rice cooker in which a lid is provided on an upper portion of a main body of a cooker so as to be openable and closable, and the lid is automatically opened by urging an opening spring when the clamp is unlocked. A spring receiving portion is provided on the hinge portion side, an opening restraining spring that resiliently restrains the lid opening force by contacting the lid with the spring receiving portion is provided, and is in contact with the spring receiving portion of the opening restraining spring. The rice cooker is characterized in that the portion to be formed is formed on the surface having a small friction coefficient.