JPH0232190Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to an electric warmer for keeping food warm.

Conventional Structures and Problems Generally, in order to prevent food or drinks from getting cold, electric warmers have been developed that place the food or drinks on a heating plate and keep them warm by heat conduction. The electric heat insulator has a heating plate 3 exposed through a window 2 of a frame body 1 as shown in FIG. 1, and a heater 4 is arranged on the back side of the heating plate 3 as shown in FIG. Heater 4
is pressed against the heating plate 3 by a spring plate 5. Note that 6 in the figure indicates the bottom plate.

By the way, when the frame 1 is a square frame, the heating plate 3 fitted into the frame 1 is automatically positioned and is in a stable combination, but when the frame 1 is a round frame There was a problem that the heating plate rotated, making it difficult to position it and making the installation unstable. Furthermore, there was a problem in that the heater 4 was also likely to be misaligned with respect to the heating plate.

Purpose of the invention The present invention takes into account the above-mentioned conventional problems, and aims to enable positioning of the heating plate and heater and reliable combination in an electric heat insulator equipped with a round frame. It is something.

Structure of the Invention In order to achieve the above object, the present invention includes a round frame body having a round window, a heating plate whose main plate surface is exposed to the round window, and a plate-shaped plate disposed on the back side of the heating plate. In an electric heat insulator having a heater, a boss having a U-shaped cross section with a concave portion facing inward is provided on the window edge of the frame, and protrusions provided on the outer periphery of the heating plate and the end of the heater are fitted into the concave portion of the boss. The heating plate and heater are configured to be positioned and prevented from rotating at the same time, and although the frame is round, the heating plate and heater can be assembled stably with simple bosses.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

In the figure, reference numeral 7 denotes a circular frame body having a round window 8, and a pair of bosses 9, 9 having a U-shaped cross section are provided on the edge of the window on the back surface of the frame body, with the concave portion facing inside. Reference numeral 10 denotes a heating plate, which consists of a plate main part 11 that fits into the round window 8, and a flange 12 formed with steps on its outer periphery. Projecting pieces 13, 13 are provided which fit into the recesses 9a of the bosses 9, 9. Reference numeral 14 denotes a plate-shaped heater disposed on the back surface of the heating plate 10, and has projecting pieces 15, 15 at both ends thereof, which fit into the recesses 9a of the bosses 9, 9.

The heating plate 10 is positioned by fitting its projections 13, 13 into the recesses 9a of the bosses 9, 9, and the heater 14 on the back side of the heating plate 10 also fits into the projections 1.
5, 15 are fitted into the recesses 9a, 9a of the bosses 9, 9 to position and prevent rotation. The heater 14 is pressed against the heating plate 10 by spring plates 16, 16', and the protrusion 1
5, 15 are fitted into the recesses 9a of the bosses 9, 9 for positioning and rotation prevention. Said spring plate 16,1
One of the spring plates 16 of 6' has both ends connected to the boss 9,
9 and positioned in the same manner. Although not shown, the bottom plate is screwed to the frame 7 to assemble the entire structure.

According to the above configuration, even if the frame body 7 is round,
The heating plate 10 fitted to this is the protruding piece 1
3 and 13 and the bosses 9 and 9, positioning and rotation prevention are performed, and the heater is also positioned and rotation prevention in the same way, so assembly is easy and the assembled state is stable. are doing. Moreover, the U-shaped bosses can be used for both positioning and rotation prevention, so there is no need to provide any other special bosses, and since there are fewer bosses in the synthetic resin frame, there are fewer molding sinks on the surface. The appearance also improves.

In the above embodiment, a pair of U-shaped bosses are provided, but the number of the bosses may be one.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention, a boss having a U-shaped cross section is provided on the back surface of the frame body, and this boss performs the two functions of positioning the heating plate and heater and preventing rotation. Since it has a simple structure, it is easy to assemble and the assembled state is stable, which is very effective in manufacturing a round electric heat insulator.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional electric warmer, Figure 2 is a sectional view of the same, Figure 3 is a back view of an electric warmer according to an embodiment of the present invention with the bottom plate removed, and Figure 4 is the same. FIG. 3 is a perspective view of main parts. 7...frame body, 8...round window, 9...boss, 9a...
... recess, 10 ... heating plate, 13 ... protrusion,
14...Heater, 15...Protrusion.

Claims (1)

[Scope of utility model registration request] A round frame body with a round window, a heating plate that exposes the main plate surface to the round window, and a plate-shaped heater arranged on the back side of the heating plate, An electric heat insulator comprising a boss having a U-shaped cross section with a concave portion facing inward, and protrusions provided at the periphery of the heating plate and at the end of the heater are fitted into the concave portions of the boss.