JP3161410U - Electric water heater - Google Patents

Abstract

An electric water heater is provided that is resistant to dust and dirt even after long-term use, has no poor operation, and is excellent in waterproof effect and safety. A disk-shaped hot plate 5 embedded in a heater 4 is stretched on a pedestal main body 2 that is hollow and has a guide cylinder 8 suspended in the center so as to seal the lower part of the guide cylinder 8, and the heater 4 is turned on and off. A switch 7 is provided, and an insertion port is formed in the center of the bottom wall that forms a part of the recess on the front surface of the base body 2. The switch 7 includes a switch body that is press-fitted into the pedestal body 2 through the insertion port, a switch button portion that is disposed above the switch body, and an annular switch support portion that is stretched on the outer peripheral surface of the middle side wall of the switch button portion. The cap-shaped seal cap that covers the upper portion of the switch 7 is integrally formed with a head portion that covers the switch button portion and a collar portion that covers the switch support portion, and the bottom wall surface is formed on the lower end surface of the collar portion. Multiple small protrusions are biting in. [Selection] Figure 2

Description

The present invention relates to an electric water heater provided with a switch for ON / OFF operation of a heater.

Conventionally, as a push button type switch used in a water purifier using liquid (water), an electric water heater, or the like, a main body case 10 is provided with a push button storage recess 11, and a push shaft of the push button 20 is provided at the center of the storage recess 11. As a utility model registration No. 3034908, there is a push button device having a structure in which a push shaft insertion hole 12 for inserting 21 is provided and the push button 20 is pushed into the housing recess 11 via an action spacer 30.

Utility model registration No. 3034908

However, in the push button type switch used in this type of water purifier or electric water heater, the action spacer is disposed below the push button pressing portion, so the push button storage recess, the push button pressing portion, and the action spacer Since there is a large gap between the two parts, there has been a problem that dust and dirt adhere to the surface of the push button during long-term use, resulting in a very unclean and eventually poor operation.
Further, when used for a long period of time, water droplets always tend to accumulate in the push button housing recess, and there is a possibility that water droplets may enter the switch body from the push shaft insertion hole, thereby threatening safety.

In the present invention, a pedestal main body 2 that is hollow inside and has a guide cylinder 8 suspended in the center, and a disk-like hot plate 5 embedded in a heater 4 are stretched so as to seal the lower part of the guide cylinder 8 of the pedestal main body 2. In addition, a switch 7 for turning the heater 4 on and off is provided, a recess 9 is provided on the front surface of the base body 2, and an insertion port that communicates with the inside of the base body 2 at the center of the bottom wall 11 forming a part of the recess 9. 10 is provided, the switch 7 is disposed in the recess 9, the container 6 containing the liquid is detachably mounted on the hot plate 5, and the electric water heater for heating the liquid in the container 6 through the hot plate 5 is provided. 1, a plurality of small protrusions 12, 12 are arranged on the surface of the bottom wall 11 around the insertion opening 10 of the recess 9 at an appropriate interval, while a switch 7) is mounted on the base body through the insertion opening 10. Switch body 7a to be press-fitted into 2 and above the bottom wall 11 above the switch body 7a. A cap-like seal cap 13 covering the upper part of the switch 7, which is composed of a switch button portion 7 b disposed in the hollow portion 9 of the portion and an annular switch support portion 7 c stretched on the outer peripheral surface of the middle side wall of the switch button portion 7 b. The seal cap 13 is integrally formed with a head portion 13a that covers the switch button portion 7b and a flange portion 13b that covers the switch support portion 7c. It is set as the structure which the protrusions 12 and 12 bite into.

The present invention solves the conventional problems, and even when used for a long time, dust and dirt are difficult to adhere to the surface of the switch button, there is no operation failure, it is excellent in waterproof effect, and always maintains safety. There is an electric water heater that can do.

The front surface of the embodiment of the present invention. AA sectional view taken on the line AA of FIG. The B section enlarged view of FIG. The disassembled perspective view which shows the principal part of this invention Example. The C section enlarged view of FIG.

  The electric water heater 1 is used for so-called milking that is heated to a predetermined temperature, and is laid on a base body 2, a bottom body 3 that covers the bottom of the base body 2, and a central upper portion of the base body 3. And a heat plate 5 provided with a heater-4, a container 6 that is detachably mounted on the heat plate 5 and contains a liquid, and a switch 7 that turns the heater 4 on and off. .

  The pedestal main body 2 is formed of a heat-resistant synthetic resin material. As shown in FIG. 2, the guide cylinder 8 is formed by hollowing inside and opening the center of the upper surface, and the peripheral wall forming the opening hangs downward. Is provided. An annular receiving portion is provided at the lower end of the guide tube 8 toward the center, and a later-described hot plate 5 is stretched on the upper surface of the receiving portion.

As shown in FIGS. 2 and 5, the pedestal main body 2 is provided with a circular recess 9 inward at the approximate center of the front surface.
The recess 9 has an insertion port 10 that penetrates into the base body 2 at the center of the bottom wall 11 that forms the recess. As shown in FIGS. 3 and 5, a plurality of small protrusions 12, 12 that are reduced upward are provided at appropriate intervals on the surface of the bottom wall 11 around the insertion opening 10.
The small protrusions 12 and 12 come into contact with the lower surface of a flange portion 13b of a seal cap 13 which will be described later, bite into the flange portion 13b, prevent the seal cap 13 from slipping, and improve the waterproofness by the seal cap. The seal cap is also prevented from being detached from the switch button portion 7b.

  As shown in FIG. 2, the bottom body 3 is formed in a dish shape so as to cover the outer periphery of the lower end of the base body, using the same heat-resistant synthetic resin material as that of the base body 3.

The hot plate 5 is formed in a disk shape as shown in FIG. 2 by using a metal material having good thermal conductivity, particularly aluminum die cast.
The hot plate 5 is stretched over the receiving part of the pedestal main body 2 via a seal packing, and a temperature sensor 15 such as a thermostat or thermistor for detecting the temperature of the hot plate is provided at the substantially lower center of the hot plate 5. It is fixed.

The heater 4 for heating the hot plate 5 is a sheathed heater and is embedded in a ring shape below the hot plate 5, and the power source is controlled via a power control unit described later.
Reference numeral 16 denotes a power supply lead for supplying external power, and supplies power to a power supply control unit that controls energization of the heater 4 and a switch 7 described later.

  As shown in FIGS. 2 and 5, the switch 7 for turning on and off the heater 4 includes a switch body 7a having a switch shaft portion, a switch button portion 7b protruding from the upper portion of the switch body, and the switch button portion. It is comprised from the cyclic | annular switch support part 7c extended on the outer peripheral surface of the middle side wall.

  As shown in FIGS. 2 and 3, the switch 7 is inserted into the recessed portion 9 of the pedestal main body 2, and the switch main body 7 a passes through the insertion opening 10 and is guided into the pedestal main body. The switch body 7a is connected to the power supply control unit via wiring. The switch button portion 7b is in an operation state that is turned on and off in accordance with left-right reversal or in response to pressing toward the switch button portion 7b. The switch support portion 7c is provided with a gap between the upper surface of the switch body 7a.

The switch 7 is covered with a seal cap 13 before being inserted into the recess 9.
This seal cap 13 is formed in a cap shape with an elastic material such as rubber or synthetic resin, and as shown in FIG. 3 or FIG. 5, the umbrella-shaped head portion 13a and the lower end of the head portion are largely surrounded. An annular flange 13b having a U-shaped longitudinal section is integrally formed.

As shown in FIGS. 2 and 3, the seal cap 13 covers the head portion 13a so as to cover the upper portion of the switch button portion 7b, and the flange portion 13b covers the entire surface of the switch support portion 7c. ing.
After insertion of the switch 7 into the recess 9, a plurality of small protrusions 12, 12 provided on the bottom wall 11 of the recess are biting into the lower end surface of the flange 13 b of the seal cap 13.

  The biting of the small protrusion 12 regulates the slip of the seal cap 13 in the recess 9, so that the seal cap 13 does not come out of the recess and is not detached from the switch 7, and can be used for a long time. In this case, waterproofness can be surely exhibited. In addition, since the finger does not touch the switch 7 directly, the surface of the switch 7 becomes difficult to get dirty. Furthermore, the seal cap 13 can be easily removed and can be easily cleaned.

The container 6 is made of a material such as heat-resistant glass and is formed into a bottle shape that has been narrowed and then widened, and a ring body is attached to the outside of the narrowed constricted portion. It is fixed.
Reference numeral 18 denotes a lid that opens and closes the mouth of the container 6.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited only to the structures of the embodiments, and includes the above-described constituent features of the present invention and also refers to the present invention. The present invention can be carried out with appropriate modifications within the scope of achieving the object and having the effects described in the present invention.

DESCRIPTION OF SYMBOLS 1 ... Electric water heater 2 ... Base body 3 ... Bottom body 4 ... Heater 5 ... Heat plate 6 ... Container 7 ... Switch 7a ... Switch body 7b ... Switch button part 7c ... Switch support part 8 ... Guide cylinder 9 ... Depression part 10 ... Insertion Mouth 11 ... Bottom walls 12 and 12 ... Small protrusion 13 ... Seal cap 13a ... Head 13b ... Hook 15 ... Temperature sensor 16 ... Power supply lead wire 17 ... Handle 18 ... Lid

Claims (1)

A pedestal body (2) that is hollow inside and has a guide cylinder (8) suspended in the center, and a heater (4) embedded disk-shaped heat so as to seal the lower part of the guide cylinder (8) of the pedestal body (2). The plate (5) is stretched, the heater (4) is turned on / off, the switch (7) is provided, and the recess (9) is provided on the front surface of the base body (2). An insertion port (10) communicating with the inside of the pedestal body (2) is drilled in the center of the bottom wall (11) forming the part, the switch (7) is disposed in the recess (9), and the heat plate (5) In the electric water heater (1) in which the container (6) containing liquid is detachably mounted and the liquid in the container (6) is heated via the hot plate (5), the recess (9) A plurality of small protrusions (12) and (12) are arranged on the surface of the bottom wall (11) around the insertion port (10) with an appropriate interval, while the switch (7) is a pedestal through the insertion port (10). A switch body (7a) to be press-fitted into the body (2), and a switch A switch button portion (7b) disposed in the recess (9) at the top of the bottom wall (11) above the main body (7a), and an annular switch stretched on the outer peripheral surface of the middle side wall of the switch button portion (7b) A cap-shaped seal cap (13) that includes a support portion (7c) and covers the upper portion of the switch (7) is provided. The head (13a) that covers the switch button portion (7b) is provided on the seal cap (13). And a flange portion (13b) covering the switch support portion (7c) are integrally formed, and a plurality of small protrusions (12), (12) of the recess portion (9) bite into the lower end surface of the flange portion (13b). Electric water heater characterized by being.

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