JPS635633Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is an electric kettle that prevents dry cooking by configuring the energizing path to the electric heater to turn on and off in response to the attachment and detachment of the pot into the main body case. Regarding.

[Technical background of the invention]

In this type of electric kettle, the pot is removably housed in the main case, which has an electric heater installed inside, while the heat transfer cap of the heat-sensitive part is installed inside the main case so that it can move up and down. It is constructed so that it always comes into elastic contact with the bottom of the pot using a spring. In addition, an operating member that moves in conjunction with the heat-sensitive section, which is made up of a heat transfer cap, is attached, and as the pot is attached and removed, the operating member moves to turn on and off the micro switch, thereby controlling the electric heater. By turning on and off the energizing path, when the pot is not housed in the main body case, energization to the electric heater is prevented, thereby preventing dry cooking.

[Problems with background technology]

In the above-described mounting structure between the heat-sensitive section and the operating member, a tongue piece formed on the heat-sensitive section is generally passed through a through hole formed on the operating member, and then caulked with a tool such as pliers. Therefore, there is a problem in that during assembly, inspection, and repair, work efficiency is reduced due to time consuming.

[Purpose of invention]

The present invention was developed in view of the above circumstances, and its purpose is to provide an electric kettle in which the heat-sensitive part and the operating member can be attached with a simple operation, and the workability is improved.

[Summary of the idea]

In this invention, one of the operation members that turns on and off the micro switch to form and cut off the current conduction path to the heat-sensitive part, which is movable up and down and is always in elastic contact with the pot by means of a spring, and the electric heater, is placed in a substantially horizontal direction. A oriented tongue piece is formed with a through hole on the other side, and the length of the tongue piece fitted into the through hole is set to be larger than the maximum allowable horizontal movement of the heat sensitive section, and the operating member and the heat sensitive This is to simplify the installation with the parts.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an inner case disposed within the main case 2; 3 a bulge portion standing in the center of the bottom of the inner case 1 and having a first opening 4 on the top surface; 5 an inner case 1;
A support plate 7 is attached to the outer bottom of the bulge 3 and has a second opening 6 corresponding to the opening 4.
A heat transfer cap of the heat sensitive part 8 disposed inside the cap, which has a stepped cylindrical shape, the small diameter part 7a of which protrudes upward through the first opening 4, and the large diameter part 7b
It is in elastic contact with the bottom of the pot 10 housed in the inner case 1 by a compression coil spring 9 which is a spring member provided between the inner case 1 and the support plate 5 . Reference numeral 11 designates a dish-shaped lower cover, which is attached to the large-diameter portion 7b of the heat transfer cap 7 by caulking. The portion of the lower cover 11 surrounded by 13 is defined as a tongue piece 15 to which an operating member 14, which will be described later, is attached. On the other hand, reference numeral 16 denotes a presser plate attached to the inner surface of the small-diameter portion 7a of the heat transfer cap 7, which is formed into a flanged ring shape from a material with a small heat capacity such as copper or brass, and is formed from one end of the peripheral edge. A presser portion 17 having a U-shaped grip portion 17a extends toward the center,
From the other side, a hanging arm 18 having a U-shaped support portion 18a is integrally formed, for example, by cutting and forming. In this state, the support portion 18a of the arm 18 is attached to the lower cover 11 as shown in FIG.
It is located in close proximity to the through hole 12 of. Reference numeral 19 denotes a tube made of a thermally conductive material, the upper end of which is fitted into the grip part 17a of the presser part 17, the middle part of which runs along the arm 18 and is supported by the support part 18a, and the lower end of which It passes through the through hole 12 of the cover 11 and extends to the second opening 6 of the support plate 5 . Reference numerals 20 and 21 denote a heat-sensitive element consisting of a thermistor inserted into the tube 19 in advance, and a conducting wire. Such a heat-sensitive element 20 senses a sudden temperature rise in the pot 10 at the end of rice cooking, sends the signal to a control circuit (not shown), and turns off the electric heater 22 disposed inside the inner case 1. Reference numeral 23 denotes an angular mounting plate consisting of a horizontal top plate 23a and a vertical vertical plate portion 23b. Plate part 2
3b, a micro switch 24 having an operating portion 24a at the lower end is attached with two screws 25 and 26. In this state, the micro switch 24 is covered by the upper plate part 23a, and the screw 25 is connected to the vertical plate part 23a.
3b and protrudes to the outside. Furthermore, a pair of L-shaped pieces 27 and 28 that oppose each other in the lateral direction are formed by cutting and bending on both the upper and lower parts of the vertical plate portion 23b of the mounting plate 23, and these L-shaped pieces 27 and 28 and The aforementioned operating member 14 is provided between the plate portions 23b so as to be vertically slidable. Such operating member 14
is formed into an L-shape having a vertical operation plate 14a and a horizontal pressing plate 14b, and the pressing plate 14b corresponds to the operation part 24a of the micro switch 24, while the operation plate 14a has a slit-shaped transparent plate. Hole 2
9 and vertically elongated holes 30 are formed at the top and bottom. The protruding end of the screw 25 is located within the vertical hole 30,
The through hole 29 is fitted into the tongue piece 15 through the groove 13 of the lower cover 11. In this fitted state, the tongue piece 15
The amount of protrusion M that protrudes from the through hole 29 (entered in Figure 1)
is set to be longer than the maximum allowable amount of movement of the heat transfer cap 7 in the horizontal direction when the heat transfer cap 7 moves up and down.

Therefore, when the pot 10 is housed in the inner case 1 as shown in FIG. is spaced apart from the operating portion 24a of the microswitch 24 and forms a current supply path to the electric heater 22. Then, when a rice cooker switch (not shown) is turned on, the control circuit becomes effective and the electric heater 22 is energized to heat the rice stored in the pot 10 together with the water and cook the rice. Further, when the pot 10 is taken out from the inner case 1, the heat transfer cap 7 moves upward until the large diameter portion 7b comes into contact with the periphery of the first opening 4, as shown by the two-dot chain line in FIG. . Accordingly, the operating member 14 is moved upward by the tongue piece 15 of the lower cover 11, and when the protruding end of the screw 25 comes into contact with the lower edge of the vertically elongated hole 30, the pressing plate 14b is moved upward as shown by the two-dot chain line in FIG. As shown, the operating portion 24a of the micro switch 24 is pressed to cut off the current supply path to the electric heater 22. As a result, even if the rice cooking switch is accidentally turned on when the pot 10 is not housed in the inner case 1, the electric heater 22 is not energized, and empty cooking is prevented.

By the way, according to the above structure, the tongue piece 15 is formed on the lower cover 11 of the heat-sensitive mechanism part 8, and the through-hole 29 is formed in the operating member 14. It is sufficient to simply fit the operating member 14 into the tongue piece 15, and to remove the operating member 14 from the tongue piece 15. Therefore, during assembly, inspection, and repair, the operating member 14 can be easily attached and detached, improving work efficiency. Moreover, since the protrusion length M of the tongue piece 15 from the through hole 29 is set to be larger than the maximum permissible horizontal movement amount of the heat transfer cap 7, the heat transfer cap 7 will move in the horizontal direction as the pot 10 is attached or removed. However, the operation member 14 remains held by the tongue piece 15 and does not come off, and the heat transfer cap 7 and the operation member 14
The attached state is maintained.

In the above embodiment, the tongue piece 15 is connected to the heat transfer cap 7.
The through hole 29 is provided in the operating member 14, but in contrast, the tongue piece 15 is placed on the operating member 14 side and the through hole 29 is provided in the operating member 14.
9 may be provided on the heat transfer cap 7 side, and in this case, the shape of the through holes 29 is of course not limited to the slit shape. Furthermore, pot 1
When the operating member 14 moves up and down as the operation member 14 is attached and detached, the screws 25 are brought into contact with the upper and lower edges of the vertically elongated hole 30, respectively. Vertical hole 3
It may be configured so that it comes into contact with the edge portion of 0.
In addition, various modifications may be made without departing from the gist of the present invention.

[Effect of idea]

As explained above, in this invention, the heat-sensitive part and the operating member can be attached simply by fitting them together.
It is possible to provide an electric kettle that improves workability during assembly, inspection, and repair.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partial longitudinal sectional side view, Fig. 2 is an enlarged exploded perspective view of the heat-sensitive mechanism section, and Fig. 3 is an enlarged perspective view of the microswitch operating section. . In the figure, 2 is the main body case, 7 is the heat transfer cap, and 8
1 is a heat sensitive part, 9 is a compression coil spring (spring member), 10 is a pot, 14 is an operating member, 15 is a tongue piece,
20 is a heat sensitive element, 22 is an electric heater, 24 is a micro switch, and 29 is a through hole.

Claims (1)

[Scope of utility model registration request] It has an electric heater for cooking disposed inside the main case, and a heat-sensitive element inside the main case for turning on/off the electric heater, and constantly moves up and down as the main case of the pot is attached/detached. A heat sensitive part is biased in a direction to make elastic contact with the pot by a spring member, and a micro switch is attached to the heat sensitive part and is displaced in conjunction with the movement of the heat sensitive part to turn on and off a micro switch to connect a current path to the electric heater. An operating member that turns on and off is provided, wherein one of the operating member and the heat-sensitive portion is formed with a tongue piece oriented in a substantially horizontal direction, and the other side is formed with a through hole, so that the tongue piece is inserted when the two members are attached. An electric kettle characterized in that, while fitting into the through-hole, the length of the tongue protruding from the through-hole is set to be larger than the maximum permissible horizontal movement amount of the heat-sensitive section.