JPH0211706Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heat-sensitive device for a temperature controller called a plug-in thermostat, which is ideal for hot plates, electric pots, etc., and in particular, it is designed to accurately move in a straight line the insulated pusher that opens and closes the switch mechanism. It performs accurate temperature control.

This type of plug-in thermostat temperature controller, which is normally used for hot plates, etc., includes a switch mechanism, a temperature control plate such as a cam plate that adjusts the degree of opening and closing of the switch mechanism, and a thermosensitive thermostat that opens and closes the switch mechanism. The heat sensitive body moves a sliding shaft using thermally expandable silicone oil sealed in a cylindrical heat sensitive pipe, and connects the switch mechanism via an insulated pusher fixed to the sliding shaft. It opens and closes. However, as mentioned above, since the sliding shaft slides inside the cylindrical pipe, the sliding shaft and the insulating presser rotate, resulting in a drawback that the temperature setting is not constant. To explain this in detail, since the lead contact plate of the switch mechanism rotates and displaces with one end as a fulcrum, the contact area between the insulated pusher and the switch mechanism is relatively small in order to reduce the contact pressure. When the sliding shaft moves as the temperature rises, the insulated pusher rotates, so there is a drawback that the degree of pressure on the lead contact plate changes due to variations in the surface finish of the pusher.

The present invention has been developed in view of the above-mentioned drawbacks, and will be described below with reference to the drawings. 1 is a split case, 2
4 is an insulating board which is provided in the case and has upright pieces 3 and 3 on both sides, and 4 is an insulating board whose both sides are attached to the upright pieces 3 and 3, with a long hole 5 provided approximately in the center and an electrical component on the top surface. Printed wiring is installed on the bottom surface. The long hole 5 is a sliding shaft 14 which will be described later.
It is provided long in the sliding direction and on the extension line of the sliding shaft 14. Reference numeral 6 denotes a switch mechanism insulated and fixed to one of the upright pieces, with contacts 7a and 7b on the tip side.
It is composed of a pair of lead contact plates 8a and 8b provided with. A cam plate 9 is rotatably attached to the other of the upright pieces, and a cam plate 10 is pivotally supported approximately at the center, with one end facing the tip of the one lead contact plate 8b and the other end elastically attached to the cam plate 9. The abutting movable plate 11 is a heat sensitive body provided protruding from one side of the case 1, and includes a cylindrical pipe 12, a thermally responsive body 13 such as silicone oil sealed in the pipe, and an expansion of the responsive body. , a sliding shaft 14 that slides in a direction parallel to the insulating substrate 4 due to contraction, and an L-shaped insulating presser 16 that is press-fitted onto the sliding shaft and has a protruding pin 15 on its upper surface. Reference numeral 17 is a temperature fine adjustment adjuster screwed onto the tip of the one lead contact plate 8a to adjust the contact pressure to the insulating presser 16; 18 is a temperature adjuster having one end in elastic contact with the insulating presser 16 and the other end; A movable contact plate 19, which is integrally fixed, is simultaneously rotated by a rotatable rotary plate that is rotatably supported, so that the pattern portion of the printed wiring mentioned above is brought into sliding contact, and a plurality of temperature indicators, which will be described later, are sequentially turned on. .
Reference numerals 20, 20, 20, 20 designate a plurality of temperature indicators such as LEDs installed upright on the upper surface of the insulating substrate 4, which are connected to the printed wiring pattern. 21 is a temperature control knob attached to the cam plate 9.

Next, the assembly order will be described. First, the switch mechanism 6 and the cam plate 9 are mounted on the upright piece 3 of the support fitting 2.
3, and the heat sensitive body 11 and movable plate 10 are attached to the support metal fitting 2. Then, the rotating plate 18 is pivotally supported on the insulating substrate 4, and both sides of the insulating substrate are fixed to the upright pieces 3, 3 to form a unit. At this time,
The protruding pin 15 of the insulating pusher 16 is inserted into the elongated hole 5 to prevent the insulating pusher 16 from rotating.

Then, the main body is attached to a cooking appliance such as a hot plate, and the switch mechanism 6 is closed to energize the heater circuit, and the temperature control knob 21 is rotated to displace the movable plate 10 via the cam plate 9. , the desired temperature is set by changing the pressing force of the other lead contact plate 8b. Eventually, as the temperature rises, the thermally responsive body 13
gradually expands, and the sliding shaft 14 slides in a direction parallel to the insulating substrate 4 as shown by the arrow in FIG. Open. At this time, as the sliding shaft 14 slides, the rotating plate 18 also rotates, and the movable contact plate 19
A plurality of temperature indicators 20, 20, 20,
20 are sequentially turned on and the insulating pusher 16 slides linearly, whereas one lead contact plate 8a moves circularly with the fixed part side as a fulcrum. The point of contact will change depending on the temperature. However,
As mentioned above, since the protruding pin 15 of the insulating pusher 16 is inserted into the elongated hole 5, the insulating pusher 16 performs accurate linear motion without rotation, and its contact point changes only in the horizontal direction. Therefore, the side surface of the insulating presser 16 that contacts the adjuster 17 does not require accurate flatness over its entire surface.

Although the present invention has been explained with the sliding shaft and the insulating presser being separate parts, they may be integrally molded with a heat-resistant insulator, and the adjuster can be provided as necessary, and the basic structure is an insulating presser. It is sufficient if the child is brought into direct contact with the lead contact plate.

As described above, the present invention mounts a switch mechanism and an insulating board with elongated holes on a support metal fitting and an electrical component attached thereto, and attaches a sliding shaft that is provided inside a pipe and slides in a direction parallel to the insulating board depending on the temperature. In the switch mechanism which is opened and closed by pressing the switch mechanism with an insulated pusher provided, the elongated hole is provided long in the sliding direction of the sliding shaft and on an extension line of the sliding shaft, and a protruding pin is provided on the insulated pusher. Since this protruding pin is inserted into the elongated hole, the insulating pusher moves in a straight line without rotating, and the contact point between the switch mechanism and the insulating pusher is in one direction (horizontal). Because it moves only in one direction (direction), highly accurate temperature control can be performed. In other words, even if the flatness of the contact side surface of the insulating presser is not constant, the insulating presser does not rotate, so that temperature variations will not occur. Furthermore, since the protruding pin moves within the long hole provided in the insulating board, there is no need to use other guiding parts, and at the same time insulation of the electrical parts can be achieved, as well as insulation around the switch mechanism and the vicinity of the sliding shaft. can.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an embodiment of the heat-sensitive device of the temperature regulator of the present invention, and FIG. 2 is a vertical sectional view,
FIG. 3 is also a cross-sectional view. 2...Supporting metal fitting, 4...Insulating substrate, 5...Elongated hole, 6...Switch mechanism, 14...Sliding shaft, 15
...Protruding pin, 16...Insulated presser.

Claims (1)

[Scope of utility model registration request] A supporting metal fitting, a switch mechanism attached to the supporting metal fitting, an insulating board having a long hole and an electrical component attached thereto, and a sliding shaft provided inside the pipe that slides in a direction parallel to the insulating board depending on the temperature. and an insulated pusher having a protruding pin, the switch mechanism is pressed by the insulated pusher to open and close, and the elongated hole is in the sliding direction of the sliding shaft. A heat-sensitive device for a temperature regulator, characterized in that the projecting pin is provided long on an extension line and inserted into an elongated hole.