JPS63174236A - Sealed type thermostat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sealed thermostat that uses bimetal to control temperature.

Conventional technology The conventional train will be explained using FIG.

Reference numeral 1 denotes a contact opening/closing mechanism, which is composed of a movable contact plate 1' held by a holder 2 and a fixed contact 3.

It is held in case 4 and caulked to terminal 5. 6 is a bimetal plate that is displaced by snap action due to temperature changes, holder is a cap that protects the bimetal plate, 8 is a pin that transmits the displacement of the bimetal plate 6 to the contact opening/closing mechanism, and 9 is a guide that holds the pin 8 slidably. These form the thermostat mechanism. Reference numeral 1Q denotes a metal housing with an open top for housing the thermostat mechanism, 11 an O ring, 12 a resin flat washer, and 13 a C washer to fix the thermostat mechanism in the housing 10.

Reference numeral 14 is a molding material which is used to attach a lead wire 15 to the terminal 6 using solder or the like, and then is filled and sealed.

The problem that the invention aims to solve In the sealed thermostat having the above configuration.

When fixing the thermostat, 7) mechanism inside the No-Ujifugu 10, the molding agent flows into the heat-sensitive surface of the thermostat,
0 ring 11゜flat washer 1 to prevent the feeling and heat from getting worse
2. It requires 13 C washers and the number of parts is large and there are 0.
The ring 11 is also expensive. In addition, when these parts are removed and fixed, the thermostat must be pressed with a jig, etc., partially filled with molding material, fixed, and then filled with molding material up to the housing opening again and fixed, which also increases the number of man-hours. .

In view of the above problems, the present invention aims to reduce the number of parts per unit and the number of man-hours.

Means for solving the problem In order to solve the above problem, the case 4 is provided with a protrusion located higher than the housing opening, the thermostat mechanism is suppressed and fixed with a jig, and the inside of the housing is fixed with a molding material. It is equipped with a hermetically sealed structure.

Function: With the above configuration, the protrusion can be molded while being pressed, so the number of parts such as O-rings is reduced.

In addition, the number of man-hours is reduced, resulting in a sealed thermostat with a simple structure and low cost.

Example This embodiment will be explained using FIG.

Components that are structurally the same as those of the conventional example are designated by the same numbers as in FIG. 2, and detailed description thereof will be omitted.

6 is a bimetal plate punched and formed into a circular shape.

7 is a cap that protects the bimetal plate and is caulked to case 4. 8 is a ceramic bottle that transmits the displacement of the bimetal plate 6 to the contact opening/closing mechanism; 9 is a disk-shaped guide having a hole in the center through which the pin 8 passes;
is slidably held. These form a thermostat mechanism section and are housed in a metal housing 10. Reference numeral 16 denotes a cylindrical protrusion provided on the case 4, which is placed at a higher position than the opening surface of the thermostat when the housing is stored.By pressing the protrusion 16 with a jig or the like, the thermostat mechanism is activated. is pressed into the No-Uji puffer fish 10, and after attaching the lead wire 16 to the terminal 5 using the molding material 14 with solder or the like,
It is filled and sealed and cut after curing.

According to the sealed thermostat configured as described above, by providing a cylindrical protrusion 16 on a part of the case 4, it is suppressed and fixed to the housing 10 to prevent the molding material 14 from flowing into the heat-sensitive surface of the thermostat. Material 1
4 can be easily filled, the number of parts is small, and the cost is low. In addition, compared to the conventional example, since it is also molded on the outer surface of the case 4, the effect of reducing the thermal influence from the outer surface can also be obtained. Furthermore, since the protrusion 16 is cut off after molding, it does not get in the way and there is no problem in terms of appearance.

Effects of the Invention As mentioned above, by providing the resin case that forms the mechanical part of the thermostat with a protrusion that is higher than the opening surface of the housing! 11% Reliable suppression and fixation is possible to prevent the mold material from flowing into the heat-sensitive surface of the thermostat, so there is no need to seal with an O-ring or washer, and the case can be pressed with a jig etc. to fill and harden the mold material. After that, there is no need to inject the molding material again and fill it up to the housing opening surface. Instead, simply press the protrusion that protrudes higher than the housing opening surface with a jig, etc., and fill the mold all the way to the housing opening surface at once. By filling and curing, the number of parts does not increase, the process is simple, and an inexpensive sealed thermostat can be provided, which is very useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a sealed thermostat showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional sealed thermostat. 1...Contact opening/closing mechanism%4...Case,
10・River・Housing, 6・Curved・Dish-shaped bimetal, 8
······pin. 9. River... Guide% 14... Mold material, 16
...protrusion. Name of agent: Patent attorney Toshio Nakao, 1 person/-
-Ichishingyo opening/closing mechanism 4- Case 1 - 11-plate type high/glue 5- Bin q- Power id 10--Haku/Zinc 14- Mold Fig. 2 7 δ L? Otsu

Claims (1)

[Claims] A metal housing with an open top surface, a dish-shaped bimetal housed in the housing, a contact opening/closing mechanism held in a resin case, a pin that transmits the operation of the bimetal to the contact opening/closing mechanism, and a pin that is slidable. A sealed thermostat comprising: a guide for holding the thermostat; the resin case has a protrusion higher than the opening surface of the housing; and the inside of the housing is sealed with a molding material.