JPH0511034U - Simple maximum temperature indicator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a simple maximum temperature indicator which has a simple structure and can be repeatedly used. [Structure] The shape memory alloy 1 is attached to the support base 2 of the simple maximum temperature indicator like a pointer, and a certain set temperature, a temperature above the set temperature, a temperature below the set temperature and the letter 3 are attached to the shape memory alloy 1. When the temperature goes above or below the set temperature,
It is a simple maximum temperature indicator that indicates whether the maximum temperature is a set temperature, a set temperature or higher, or a set temperature or lower by deforming the shape memory alloy into a shape stored in advance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a maximum temperature indicator.

[0002]

[Prior Art]

 Conventionally, this type of maximum temperature indicator is equipped with a mechanism that indicates the temperature reached by measurement in addition to an ordinary thermometer, or by utilizing the melting point or chemical change of a substance, the maximum temperature to be measured by color change is the set temperature or more. Although an adhesive seal or a paint type that determines whether or not it has been put into practical use, the former has a drawback that the mechanism is complicated and expensive, and the latter cannot be reused.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a simple maximum temperature indicator which has a simple mechanism for eliminating these drawbacks and which can be repeatedly used.

[0004]

[Means for Solving the Problems]

 The present invention uses a shape memory alloy, and when the temperature exceeds a certain set temperature, the shape memory alloy transforms into a shape that is stored in advance, so that the maximum temperature measured is above the set temperature or below the set temperature. It is designed to be directed, characterized by its simple structure and repeatability.

[0005]

[Action]

 A shape memory alloy is used for the simple maximum temperature indicator, and when the temperature reaches a certain set temperature, or when the temperature exceeds the set temperature or falls below the set temperature, the shape memory alloy is memorized in advance. The shape memory alloy indicates whether the temperature is above the set temperature, above the set temperature, or below the set temperature by transforming into.

[0006]

Example Next, an example will be described.

[0007]

Embodiment 1 FIG. 1 is a perspective view of a simple maximum temperature indicator showing an embodiment of the present invention. First, the initial state of the set is the state of FIG. 1 (a), and the shape memory alloy 1 is attached to the support base 2 of the simple maximum temperature indicator as shown in FIG. 1 (a). The case where the set temperature is set to 50 ° C is indicated by the letter 3. However, the shape memory alloy has been preliminarily subjected to shape memory treatment, and its form is as shown in FIG. 1 (b). That is, when the shape memory alloy 1 reaches a temperature of 50 ° C. or higher on the support base 2 of the simple maximum temperature indicator, the shape memory alloy 1 is deformed to a high temperature side like the shape memory alloy 1 in FIG. Show. When the highest temperature reached is equal to or lower than the set temperature, the shape memory alloy is not deformed and remains in the state of (a) in FIG. However, when the maximum temperature reached is higher than the set temperature, the shape memory alloy is deformed as shown in Fig. 1 (b), and even if the temperature is lower than the set temperature, the shape is maintained, and the highest temperature is set to the set temperature. Instruct that the above is the case. Further, by applying an external force with a finger or the like, it can be easily set again as shown in FIG. 1 (a) and can be used many times.

[0008]

Example 2 Further, FIGS. 1 (c) and 1 (d) show the case of using a shape memory alloy having several kinds of transformation temperatures. In this case, the deformation temperatures are 45 ° C, 50 ° C, 55 ° C and 60 ° C. FIG. 1C shows the case where the initial state of the set and the maximum temperature are 45 ° C. or lower. The operating principle is the same as that of the above-mentioned embodiment, but by combining a plurality of different set temperatures, it is possible to more strictly indicate what the maximum temperature was. FIG. 1D shows the case where the maximum temperature is between 55 ° C and 60 ° C.

[0009]

Third Embodiment In FIGS. 1A and 1B of the first embodiment, and in FIGS. 1C and 1D of the second embodiment, the shape memory alloy 1 is attached to the support base 2. However, the shape memory alloy 1 reaches the lower surface of the support base 2 and has a certain area, and the shape memory alloy 1 exposed on the lower surface of the support base is brought into contact with an object whose temperature is to be measured. By doing so, not only the ambient temperature but also the temperature of the object in contact with the shape memory alloy can be measured.

[0010]

[Effect of the device]

 As described above, according to the present invention, it is possible to obtain a maximum temperature indicator having a simple structure and the advantage that it can be repeatedly used.

[Brief description of drawings]

FIG. 1 is a perspective view showing one of the embodiments when the maximum temperature is set to 50 ° C. FIG. 6A is a perspective view showing an initial state of setting and a case where the maximum temperature is 50 ° C. or lower. FIG. 3B is a perspective view showing a case where the maximum temperature of the shape memory alloy is 50 ° C. or higher. (C) is a case where shape memory alloys having different transformation temperatures are used, and the set temperatures are 45 ° C. and 50 ° C., respectively.
The perspective view which shows one of the Example in case of (degreeC, 55 degreeC, 60 degreeC), and shows the case where the initial state of a set and the maximum temperature were 45 degreeC or less. In (d), the maximum temperature is 55 ° C to 6
The perspective view which shows the example at the time of being between 0 degreeC.

[Explanation of symbols]

 1 Shape memory alloy 2 Support base 3 characters

Claims (1)

[Claims for utility model registration] [Claim 1] When a shape memory alloy is used and the temperature exceeds a certain set temperature, the shape memory alloy is transformed into a shape stored in advance, so that the measured temperature is above the set temperature. A simple maximum temperature indicator that indicates whether it was warm or below the set temperature.