JPH063216U - Heat sink mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a mounting structure of a heat sink having an excellent appearance and strength. [Structure] The lid ring 42 is formed into a substantially dish shape, while the heat radiating plate 44 and the lid packing 45 are arranged on the lower surface of the lid ring 42, and the attachment ring 46 is screwed from the rear surface side of the lid ring 42, thereby A heat dissipation plate 44 and a lid packing 45 are sandwiched between the ring 42 and the attachment ring 46. As a result, the head of the screw is the upper surface of the lid ring 42,
That is, since it is located inside the lid 12, the appearance is not impaired.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for a heat dissipation plate provided on a lid of a rice cooker.

[0002]

[Prior art]

 In the rice cooker, water is condensed on the inner surface of the lid to prevent heat from falling on the cooked rice or flowing out of the rice cooker when the lid is opened. There is a radiator provided with a heater to prevent water droplets from being generated. Conventionally, such a radiator plate mounting structure has been shown, for example, in FIG. 5 or FIG.

In the mounting structure shown in FIG. 5, the lid ring 1 has a large-diameter opening 1a formed in the center thereof. The radiator plate 2 having the heater 2a is arranged so as to cover the opening 1a from the upper side of the lid ring 1. A lid packing 3 is sandwiched between the outer edge portion of the heat radiating plate 2 and the inner edge portion of the lid ring 1, and the heat radiating plate 2 is screwed to the lid ring 1 from the upper surface side. The lid ring 1 is fitted to an edge of a lid body 4 having a substantially dish shape.

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

[0005]

[Problems to be solved by the device]

 However, in the mounting structure shown in FIG. 5, a large opening portion 1a is formed in the central portion of the lid ring 1, so that 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 has a dish shape, it is less likely to be deformed than that shown in FIG. 5, but the heat sink 8 is screwed from the lower surface side of the lid ring 6. However, there is a problem in 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, and an object thereof is to provide a mounting structure for a heat sink having an excellent appearance and strength.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a structure for mounting a heat-dissipating plate, in which a heat-dissipating plate equipped with a heat-retaining heater is screwed together with a lid packing to a lid ring fitted to the edge of the lid body. While the lid ring is formed into a substantially dish shape, the heat radiating plate is sandwiched between the lid ring and an attachment ring arranged on the lower surface side of the lid ring to attach the attachment ring. The lid ring is screwed from the upper surface side.

[0007]

[Action]

 In the present invention, since the heat sink and the lid packing are sandwiched between the lid ring and the mounting ring and screwed from the upper surface side of the lid ring, the head of the screw may be exposed inside the rice cooker. Absent. Further, the lid ring has a high dish strength because it has a substantially dish shape with no opening.

[0008]

【Example】

 Next, an 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 rotatably provided on the rice cooker main body 11 about a hinge shaft 11a. The rice cooker body 11 includes an outer case 13 forming a bottom plate and a side plate, a shoulder body 14 forcibly fitted to the upper end of the outer case 13, and a dish-shaped protection frame 15 housed in the outer case 13. And a cylindrical metal inner case 16 having an upper end fitted to the shoulder body 14 and a lower end fitted to the protection frame 15.

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

A mounting hole 16a having a substantially rectangular shape is bored in the inner case 16, and a heater 22 for keeping heat is arranged in a portion excluding the mounting hole 16a. A sensor holder 24, in which a pair of side sensors 23, 23 are respectively mounted vertically, is fitted into the mounting hole 16a. These sensors 23, 23 are pressed against the outer surface of the rice cooking container 18 and detect the internal temperature via the rice cooking container 18. An aluminum reflector 25 is provided on the outer edge of the protective frame 15 to prevent noise from leaking.

In the lower space of the rice cooker body 11, an IH board 26, on which electronic components such as transistors (not shown) are mounted, is housed. The IH board 26 has a large number of heat radiation fins 27, and a fan 28 is rotatably attached. 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 component. Reference numeral 30 denotes a battery board provided with a battery for backing up electronic parts, which is arranged on the rear side of the lower space of the rice cooker body 11 (see FIG. 4).

A substrate holder 31 is housed in the front space of the rice cooker body 11. The substrate holder 31 includes a vertical surface portion 31a located on the lower side of the rice cooker body 11 and an inclined surface portion 31b located on the upper side, and the substrates 32a and 32b are fixed to each other. Three switches such as a rice cooking 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 the panel 36 provided on the front upper portion of the rice cooker 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 includes a substantially dish-shaped lid body 41, a generally dish-shaped lid ring 42 fitted to an edge portion of the lid body 41, and a lower surface of the lid ring 42. The radiator plate 44 provided with the heater 43, and the lid packing 45 that comes into pressure contact with the outer edge of the rice cooking container 18 when the lid body 41 is closed by the rice cooker body 11, the radiator plate 44, and the lid. It is composed of a mounting ring 46 for fixing the packing 45 to the lid ring 42.

As shown in FIG. 3, a steam port 47 is formed in the lid main body 41, and a cylindrical portion 48 is extended from the lower surface side edge part of the steam port 47. The tubular portion 48 is substantially half-notched on the rear end side of the lid body 41, and has a pair of locking receiving portions 49 (one of which is not shown) protrudingly provided on the outer peripheral surface thereof.

An accommodating recess 50 is formed in the lid ring 42 so that the heat dissipation plate 44, the lid packing 45, and the attachment ring 46 are arranged. A reinforcing rib 51 and a screw hole 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 for locking the locking receiving portions 49 are provided on the outer peripheral side. Further, in the lower surface accommodating recess 50 of the lid ring 42, an annular projection 55 for positioning the lid ring 42 is provided at a position spaced apart from the side surface by a predetermined distance.

The heat dissipation plate 44 is made of aluminum, and an outer edge portion thereof is bent into a substantially L-shaped cross section so as to come into contact with the bottom surface of the accommodation recess 50 (outside of the protrusion 55). Further, as shown in FIG. 1, a through hole 44a is formed in the heat dissipation 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 communication grooves 57 at four locations equally, and communicates with the inside and outside of the rice cooker while being fitted in the through holes 44a.

The lid packing 45 is made of silicon rubber or the like in a bellows shape, and one end thereof is extended to the outer peripheral side in a substantially L-shaped cross section. The attachment ring 46 is made of a synthetic resin material such as polypropylene and has an annular shape. The inner edge of the attachment ring 46 extends in a substantially L-shape so that the edge of the lid packing 45 can be held.

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. Stop. Next, the lid ring 42 is fitted to the lid body 41 with the hook 42a provided on the tip side of the lid ring 42 inserted into the through hole 41a formed in the tip edge portion of the lid body 41 (see FIG. 1). ). At this time, since the tubular portion 48 is cut away by half, the steam passage portion 53 smoothly fits into the steam port 47. Moreover, since the locking piece 54 is locked to the locking receiving portion 49, the lid body 41 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. Becomes In the state assembled in this way, 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]

[Effect of device]

 As is clear from the above description, according to the heat dissipation plate mounting structure of the present invention, the lid ring has a substantially dish shape with no opening, so that the strength thereof is improved. Also, the mounting ring holds the heat sink and lid packing on the lid ring, and the mounting ring is screwed from the back side of the lid ring, so the head of the screw is exposed to the inside of the rice cooker. And the appearance is excellent.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rice cooker according to an embodiment.

FIG. 2 is a partially enlarged cross-sectional view of FIG. 1 showing a heat dissipation plate mounting structure.

FIG. 3 is a partially enlarged cross-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 heat dissipation plate mounting structure according to a conventional example.

FIG. 6 is a partial cross-sectional view showing a mounting structure of a heat dissipation plate according to another conventional example.

[Explanation of symbols]

11 ... Rice cooker main body, 12 ... Lid body, 34 ... LCD spacer, 35 ... LCD, 36 ... Panel, 42 ... Lid ring, 4
4 ... Heat sink, 45 ... Lid packing, 46 ... Mounting ring.

Claims (1)

[Scope of utility model registration request] 1. In a radiator plate mounting structure in which a radiator plate provided with a heating heater is fixed to a lid ring fitted to an edge of a lid body together with a lid packing, the lid ring is substantially omitted. While forming a dish shape, the heat sink and the lid packing are sandwiched between the lid ring and the attachment ring arranged on the lower surface side of the lid ring, and the attachment ring is screwed from the upper surface side of the lid ring. The heat sink mounting structure characterized in that