JP2561881Y2 - Heat sink mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a heat sink provided on a lid of a rice cooker.

[0002]

2. Description of the Related Art In order to prevent water droplets condensed on the inner surface of a lid from falling onto cooked rice or from flowing out of the rice cooker when the lid is opened, a rice cooker has a lid. There is one in which a heat radiating plate provided with a heater for keeping heat is provided on the inner surface to prevent water droplets from being generated. Conventionally, such a heat sink mounting structure is as shown in FIG. 5 or FIG. 6, for example.

In the mounting structure shown in FIG. 5, a large-diameter opening 1a is formed at the center of the lid ring 1. The heat radiating plate 2 having the heater 2a is disposed so as to cover the opening 1a from above the lid ring 1. Heat sink 2
Between the outer edge of the cover ring 1 and the inner edge of the lid ring 1.
The radiator plate 2 is screwed to the lid ring 1 from above. The lid ring 1 is fitted to an edge of a substantially dish-shaped lid body 4.

On the other hand, in the mounting structure shown in FIG. 6, the lid ring 6 does not have the opening 1a like the lid ring 1 and has a substantially dish shape, and is fitted to the edge of the lid main body 7. I have. The radiator plate 8 having the heater 8a is screwed from the lower surface side of the lid ring 6 with a lid packing 9 interposed therebetween.

[0005]

However, in the mounting structure shown in FIG. 5, since a large opening 1a is formed in the center of the lid ring 1, a predetermined strength cannot be obtained. Moreover, since the lid ring 1 having the opening 1a is made of a resin material, it is easily deformed after molding. On the other hand, in the mounting structure shown in FIG. 6, since the lid ring 6 is formed in a dish shape, the lid ring 6 is less likely to be deformed than that shown in FIG. 5, but the radiator plate 8 is screwed from the lower surface side of the lid ring 6. Since the necessity arises, there is a problem that the head of the screw is exposed and the appearance is impaired. The present invention has been made in view of the above problems,
An object of the present invention is to provide a heat sink mounting structure having excellent appearance and strength.

[0006]

According to the present invention, in order to achieve the above object, a heat sink provided with a heater for keeping warm is screwed together with a lid packing to a lid ring fitted to an edge of the lid body. In the heat-radiating plate mounting structure described above, the lid ring has a substantially dish shape, and the heat-radiating plate is sandwiched together with a lid packing between the lid ring and a mounting ring disposed on the lower surface side of the lid ring. Then, the mounting ring is screwed from the upper surface side of the lid ring.

[0007]

[Action] In the present invention, between the lid ring and the mounting ring,
Since the heat radiating plate and the lid packing are sandwiched and screwed from the upper side of the lid ring, the head of the screw is not exposed inside the rice cooker. In addition, since the lid ring has a substantially dish shape without an opening, it has high strength.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The induction heating type rice cooker shown in FIG. 1 includes a rice cooker main body 11 and a lid 12 provided on the rice cooker main body 11 so as to be rotatable around a hinge shaft 11a. The rice cooker main body 11 includes an outer body 13 forming a bottom plate and a side plate, a shoulder body 14 forcibly fitted to an upper end of the outer body 13, and a dish-shaped protection frame 15 housed in the outer body 13. The upper end is fitted to the shoulder 14, and the lower end is formed of a cylindrical metal inner body 16 fitted to the protective frame 15.

The shoulder 14, the protective frame 15, and the inner body 16
A rice cooking container 18 is accommodated in the container accommodating portion 17 formed by the above. Below the protective frame 15, a ferrite mounting base 19 mounted on the outer shell 13 is located. An induction heating coil 20 is disposed on the upper surface of the mounting base 19 between the mounting frame 19 and the protective frame 15, and eight ferrites 21 are radially mounted on the lower surface of the mounting base 19 (see FIG. 4). . The ferrite 21 is for preventing the lines of magnetic force generated when the induction heating coil 20 is energized from reaching the electronic components.

A substantially rectangular mounting hole 16a is formed in the inner body 16, and a heater 22 for keeping heat is provided in a portion other than the mounting hole 16a. The mounting hole 16a
A sensor holder 24 in which a pair of side sensors 23, 23 are respectively attached to the upper and lower sides is fitted. These sensors 23, 23 are in pressure contact with the outer surface of the rice cooker 18 and detect the internal temperature through the rice cooker 18. An aluminum reflector 25 is provided on the outer edge of the protection frame 15 to prevent noise from leaking.

An IH board 26 on which electronic components such as transistors (not shown) are mounted in a space below the rice cooker main body 11.
Is housed. The IH board 26 has a number of radiating fins 27, and a fan 28 is rotatably attached thereto. The fan 28 is rotated by a motor 29, sucks air through a plurality of air holes 13a formed in the bottom plate, and cools the electronic components. Reference numeral 30 denotes a battery substrate on which a battery for backing up electronic components is provided, which is disposed behind the lower space of the rice cooker main body 11 (see FIG. 4).

A substrate holder 31 is accommodated in the front space of the rice cooker main body 11. The substrate holder 31 includes a vertical surface portion 31a located on the lower side of the rice cooker main body 11, and an inclined surface portion 31b located on the upper side.
32b are respectively fixed. Three switches such as a rice cooker switch 33a are mounted on a substrate 32b fixed to the inclined surface portion 31b, and an LCD 35 is attached via an LCD spacer 34. The LCD 35 is visible from a panel 36 provided at the upper front part of the rice cooker main body 11.

Hereinafter, the mounting structure of the heat sink according to the present invention will be described in detail. As shown in FIG. 2, the lid body 12 has a substantially dish-shaped lid body 41, a substantially dish-shaped lid ring 42 fitted to an edge of the lid body 41, and a lower surface of the lid ring 42. And a radiator plate 44 provided with a heater 43 and a lid body 41 when the rice cooker body 11 is closed.
And a mounting ring 46 for fixing the heat radiating plate 44 and the lid packing 45 to the lid ring 42.

[0014] As shown in FIG.
A steam port 47 is formed, and a tubular portion 48 extends from a lower side edge of the steam port 47. This cylindrical part 4
8, a rear end side of the lid main body 41 is cut out substantially half, and a pair of locking receiving portions 49 (one not shown) is provided on the outer peripheral surface.
Is protruding.

The cover ring 42 is formed with a housing recess 50 so that a heat radiating plate 44, a cover packing 45, and a mounting ring 46 are provided. Reinforcing ribs 51 and screw holes 52 are formed on the upper surface of the lid ring 42, and a steam passage portion 53 that fits into the steam port 47 is provided (see FIG. 3). A plurality of slits 53a are formed on the upper surface of the steam passage portion 53, and locking pieces 54 that lock with the locking receiving portions 49 are provided upright on the outer peripheral side. Further, an annular ridge 55 for positioning the lid ring 42 at a position spaced apart from the side surface by a predetermined distance is provided in the lower surface receiving recess 50 of the lid ring 42.

The radiator plate 44 is made of aluminum.
The outer edge is bent into a substantially L-shaped cross section, and
Abut on the bottom surface (outside of the ridge 55). Further, as shown in FIG. 1, a through hole 44a is formed in the heat radiating plate 44 at a position corresponding to the steam passage portion 53, and a steam leak adjusting plug 56 is fitted therein. The steam leak adjusting plug 56 is provided with four communication grooves 57 equally divided into four places.
The inside and outside of the rice cooker communicate with each other in a state fitted in the through hole 44a.

The lid packing 45 is formed of bellows made of silicon rubber or the like, and has one end extending to the outer peripheral side in a substantially L-shaped cross section. The mounting ring 46 has an annular shape made of a synthetic resin material such as polypropylene. The inner edge of the mounting ring 46 has a substantially L-shaped cross section, and can hold the edge of the lid packing 45.

The lid 12 having the above structure is assembled as follows. That is, first, the heat radiating plate 44 and the lid packing 45 are sequentially arranged in the lower surface accommodating recess 50 of the lid ring 42, and both are sandwiched between the lid rings 42 by the mounting ring 46, and screwed from the upper surface side of the lid ring 42. I do. Next, the hook 42a provided on the distal end side of the lid ring 42 is connected to the lid body 41.
The cover ring 42 is fitted to the cover main body 41 in a state where the cover ring 42 is inserted into the through hole 41a formed at the tip edge of the cover (see FIG. 1). At this time, since the cylindrical portion 48 is partially cut out, the steam passage portion 53 is smoothly fitted into the steam port 47. Further, since the locking piece 54 is locked by the locking receiving portion 49, the lid main body 41 is locked.
And the lid ring 42 are accurately positioned, and the upper surface of the steam passage 53 and the surface of the lid body 41 are flush with each other. In the assembled state, the head of the screw is located on the upper surface side of the lid ring 42, that is, inside the lid 12, and the appearance is improved.

[0019]

As is clear from the above description, according to the heat sink mounting structure of the present invention, since the lid ring has a substantially dish shape without an opening, its strength is improved. Also,
With the mounting ring, the radiator plate and lid packing are sandwiched by the lid ring, and the mounting ring is screwed from the back side of the lid ring, so that the head of the screw is not exposed inside the rice cooker, The appearance is excellent.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rice cooker according to the present embodiment.

FIG. 2 is a partially enlarged sectional view of FIG. 1 showing a mounting structure of a heat sink.

FIG. 3 is a partially enlarged sectional view of FIG. 1 showing a structure of a steam port.

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a partial cross-sectional view showing a mounting structure of a heat sink according to a conventional example.

FIG. 6 is a partial sectional view showing a mounting structure of a heat sink according to another conventional example.

[Explanation of symbols]

11 rice cooker body, 12 lid, 34 LCD spacer, 35 LCD, 36 panel, 42 lid ring, 4
4: heat sink, 45: lid packing, 46: mounting ring.

Claims (1)

(57) [Scope of request for utility model registration] 1. A radiator plate mounting structure in which a radiator plate provided with a heater for keeping heat is screwed together with a lid packing to a lid ring fitted to an edge of a lid body, wherein the lid ring is substantially fixed. On the other hand, the heat sink is sandwiched between a lid ring and a mounting ring disposed on the lower surface side of the lid ring together with a lid packing, and the mounting ring is screwed from the upper surface side of the lid ring. A heat sink mounting structure characterized by the following.