KR20030006152A - Temperature sensor using shape memory alloy - Google Patents

Abstract

PURPOSE: A temperature sensor using shape memory alloy is provided to simplify configuration and allow for ease of manufacture, while improving accuracy of sensing. CONSTITUTION: A temperature sensor comprises a plurality of sensor parts(10) each of which has a first shape formed by bending a wire made of a shape memory alloy, in the range of a predetermined transformation temperature, and a second shape to which the sensor part returns, in the range of a temperature exceeding the transformation temperature; and a housing(20) having a fixing part(22) formed integrally with the housing so as to fix sensor parts at the inner surface of the housing, and temperature checking holes(23) formed along the line which is made when a free end(12) of each sensor part advances, drawing a circular arc having a finite angle.

Description

Temperature sensor using shape memory alloy {TEMPERATURE SENSOR USING SHAPE MEMORY ALLOY}

The present invention relates to a temperature sensor using a shape memory alloy, and more particularly, to a temperature sensor using a shape memory alloy that can detect whether a product to be stored at a low temperature is exposed above a critical temperature.

Usually, the metal material deforms above the elastic limit and plastically deforms and remains permanent. On the other hand, the shape memory alloy has a property of giving plastic deformation to a recognizable degree at the yield point, and returning to the shape before deformation when heated or lost, and include Ti-Ni, Cu, and Fe. Martensitic transformation and shape memory characteristics and crystal structures at high and low temperatures are well known.

These shape memory alloys have been used in various fields such as home appliances, industrial instruments, medical instruments, telecommunications, and aerospace industries until now, and have a shape memory heat treatment according to a predetermined purpose in relation to temperature. It can be made to have a predetermined shape.

In view of this, the shape memory alloy can be used as a functional material for sensors and actuators by using its deformable shape, or simply plate or linear to return to its original shape outside the predetermined transformation temperature range. It is used as a fixed part of to show temperature display.

A simple stationary component that displays this temperature can easily identify whether frozen dairy products, such as frozen meat, and frozen foods, such as milk, have been stored at a predetermined temperature or exposed above a critical temperature during distribution. It is used to make it possible.

As a representative technique, U.S. Patent No. 5,735,607 discloses a shape memory alloy thaw sensor, which is a patent for a frozen food such as blood, or a frozen product such as a medicine even after thawing for a short period of time or after being exposed above a critical temperature. By indicating that the product was in an unstable state even when it is under the storage temperature of the product, the product is permanently displayed while the product is in circulation or inadvertently handled and the malfunction of the cooling system is permanently displayed to prevent inadvertent use of these products. To this end, the sensor has a shape memory alloy that changes the shape of the sensor above the critical temperature, ie Austin temperature, and does not return to its original shape even in the Martinitic phase where the temperature becomes the initial temperature. The sensor is also with shape memory alloys; Display surface; At least one member which is a first shape below the critical temperature and a second shape above the critical temperature, and becomes a second shape above the critical temperature and does not return to the first shape even when the temperature is returned below the critical temperature; The display surface is provided on the member and does not appear when the member has the first shape, but is composed of indicators such that the display surface appears by having the second shape.

However, this patent adds a structure that prevents the member from returning to the second shape as the shape memory alloy member is deformed, so that the structure is complicated, and the deformation of the shape alloy itself is not used. . Therefore, these sensors are expensive and can be used for specific products, and are difficult to use in general products. In addition, even when used in a specific product, this sensor has a disadvantage that a cumbersome process, such as the base mounting the sensor should be properly attached to the product. In addition, this sensor was inconvenient to carefully check the status of the indicator.

However, since a temperature sensor using a functional metal such as a conventional shape memory alloy is generally provided with a single shape memory alloy member and is operated by a predetermined temperature value, it is difficult to apply to a relatively wide temperature range. There was a drawback in not being able to provide precise temperature information.

In addition, when the conventional temperature sensor is installed in plural in order to provide information on temperature more precisely, the coupling configuration is complicated by additionally coupled components, thereby increasing the manufacturing cost. In addition, if the additionally coupled components increase for precise temperature measurement, the weight and volume of the temperature sensor is very inconvenient to use due to the increase, there is a disadvantage that it is difficult to apply in a small volume, such as a vaccine bottle.

Accordingly, the present applicant has carried out a continuous research effort on the temperature sensor, and came up with a simpler configuration and a slimr form, which allows more effective and reliable temperature measurement and confirmation, while devising the present invention that is easy to manufacture.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, it is composed of a wire-type sensor unit and a housing so as to check whether the product is exposed to a critical temperature or more, and additionally provides an operation control unit It is an object of the present invention to provide a temperature sensor using a shape memory alloy.

1A and 1B are perspective views for explaining a configuration of a temperature sensor using a shape memory alloy according to a first embodiment of the present invention;

Figure 2 is a bottom view for explaining the operation of the temperature sensor using the shape memory alloy shown in Figure 1b,

3A and 3B are perspective views illustrating a state of use of a temperature sensor using the shape memory alloy shown in FIG. 1B;

4 and 5 are enlarged perspective views of the display unit of the temperature sensor using the shape memory alloy shown in FIG.

6 is a bottom view for explaining an operation relationship of a temperature sensor using a shape memory alloy equipped with a display unit shown in FIG.

7 is a perspective view for explaining a configuration of a temperature sensor using a shape memory alloy according to a second embodiment of the present invention;

8 is a bottom view for explaining an operation relationship of the temperature sensor using the shape memory alloy shown in FIG.

9 is an exploded perspective view for explaining a configuration of a temperature sensor using a shape memory alloy having a first operation control unit;

10 is a perspective view for explaining a coupling relationship of the first operation control unit shown in FIG.

11 is an exploded bottom view for explaining a configuration of a temperature sensor using a shape memory alloy having a second operation control unit;

12 is a bottom view for explaining a coupling relationship of the second operation control unit shown in FIG.

FIG. 13 is a bottom view for explaining an operation relationship of a temperature sensor using a shape memory alloy in which a plurality of sensor units are arranged in a horizontal direction;

14 is a perspective view for explaining a configuration of a temperature sensor using a shape memory alloy according to a third embodiment of the present invention;

15 to 17 are bottom views for explaining the coupling relationship of the temperature sensor using the shape memory alloy shown in FIG.

18 is an exploded perspective view for explaining the configuration of a temperature sensor using a shape memory alloy having a third operation control unit according to a fourth embodiment of the present invention;

19 is a bottom view for explaining a configuration of a temperature sensor using a shape memory alloy having a fourth operation control unit;

20 is a cross-sectional view taken along line A-A 'to explain a method of operating a temperature sensor using the shape memory alloy shown in FIG. 19;

21A and 21B are bottom views for explaining a configuration of a temperature sensor using a shape memory alloy in which a plurality of fourth operation control units shown in FIG. 19 are arranged;

♠ Explanation of symbols on the main parts of the drawing ♠

10: sensor unit 11: fixed end

13, 14: display unit 21: mounting groove

22, 22a, 22b, 22c, 22d, 22e: fixing part 23, 23a, 23b: confirmation hole

20,20a, 20a ", 20a", 70,70 ', 70 ": housing 25: text

30: packaged product 40: first operation control unit

41: protrusion 50: second operation control unit

51: second projection 52: the first inclined surface

60: Vial 80: Third operation control unit

90: fourth operation control unit

An object of the present invention as described above is to have a second shape in which the wire of the shape memory alloy material is bent within a predetermined transformation temperature, and has a first shape which is inherently linear in a shape recovery temperature range exceeding the predetermined transformation temperature. A plurality of sensor parts returning to the sensor and the fixing part to integrally fix the sensor parts to the inner surface, and the temperature checking holes are formed on the operating line passing through the free end of the sensor part drawing a circular arc of a finite angle, respectively. It is achieved by a temperature sensor using a shape memory alloy, characterized in that it comprises a housing.

In addition, according to the present invention, it is preferable that display portions having a relatively large area are coupled to the free end of the sensor portion.

Further, according to the present invention, the housing is formed with a plurality of projection coupling holes in the front and side, each of the sensor parts due to the respective first and second projections inserted into the first and second projection coupling holes It is preferable to combine the belt-shaped first and second operation control portions that control the return from the second shape to the first shape.

Further, according to the present invention, the third operation control portion having a third projection portion to form a third projection engaging holes for maintaining a predetermined interval in a circular shape on the upper surface of the housing, respectively, and to control the movement of the sensor portion It is preferable to combine.

In addition, according to the present invention, it is preferable that the housing further includes a fourth operation control unit which locks the protruding jaw of the display unit to the cut operation groove and restricts the operation and allows the display unit to be separated from the housing by the integrated push button.

In addition, according to the present invention, it is preferable that the characters and characters are formed around the temperature checking holes of the housing so that the user can recognize the damage of the product precisely by checking the temperature step by step.

In addition, according to the present invention, the housing is preferably formed in a circular cap shape so that it can be placed on top of the vial.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of a temperature sensor using a shape memory alloy according to the present invention will be described in detail.

First Embodiment

The description of the present invention may be given the same or similar reference numerals for the same or corresponding components in order to facilitate understanding of the invention in FIGS. 1A-21B.

1A and 1B are perspective views for explaining a configuration of a temperature sensor using a shape memory alloy according to a first embodiment of the present invention, and FIG. 2 is a bottom view for explaining an operation relationship of a temperature sensor. 3A and 3B are perspective views illustrating a state of use of the temperature sensor. 4 and 5 are enlarged perspective views of a display unit of a temperature sensor, and FIG. 6 is a bottom view for explaining an operation relationship of a temperature sensor using a shape memory alloy equipped with a display unit.

1A and 1B, the temperature sensor according to the first embodiment of the present invention basically has a sensor part 10 made of a shape memory alloy material, and a rectangular flat plate shape in which the sensor part 10 is installed on an inner surface thereof. It consists of a housing (20).

First, the sensor unit 10 has a wire shape as a shape memory alloy material manufactured by powder metallurgy. The sensor unit 10 uses the shape memory effect. Here, the shape memory effect means that the shape is memorized at a constant temperature, and when deformed at a temperature lower than the shape memory temperature, the sensor unit 10 is heated to the shape recovery temperature again. Means the property to return to. Here, the sensor unit 10 has a second shape that is deformed and curved within a predetermined transformation temperature, and returns to the first original shape, which is inherently linear, in a shape recovery temperature range exceeding the predetermined transformation temperature. Since the sensor unit 10 is formed of a wire of shape memory alloy material, the end of the coil-shaped wire bundle is pulled down to form a straight line, and then cut to fit the length of the sensor unit 10 of the present invention. By doing so, there is an effect that can be easily produced in large quantities.

The sensor unit 10 used throughout the present specification is a one-way shape memory alloy that returns to the original shape when the shape stored at a high temperature is deformed at room temperature and then heated, and once restored from the second shape to the first shape, Even if the temperature decreases, it does not deform from the first shape to the second shape again. Since this can be adjusted by the shape memory process, the present description does not limit the directionality of the shape memory alloy (one direction, two directions, and all directions).

In addition, as shown in the plane of FIG. 1A, the housing 20 maintains a flat surface, and is formed of a metal sheet having a superior thickness of plastic material or thermal conductivity to a thickness slightly thicker than the thickness of the sensor unit 10. As shown in FIG. 1B, the housing 20 forms a rectangular mounting groove 21 having an area slightly smaller than the total area thereof, and the edge surface 24 around the rectangular mounting groove 21. An adhesive or double sided tape can be placed and attached to the mounting surface. On one side of the corner side of the rectangular mounting groove 21, the fixing portion 22 having a coupling hole or a coupling groove extends slightly in a planar direction so that the fixing end 11 of the sensor portion 10 can be bonded to each other. . In addition, at one side of the housing 20, the temperature checking hole 23 is formed to penetrate at a point passing when the free end 12 of the sensor unit 10 moves in a fan shape. More specifically, the temperature checking hole 23 is a through hole in which the shaft center is positioned at a predetermined position on an imaginary curve passing through the fixing part 22 in the longitudinal direction of the housing 20. This temperature checking hole 23 has a diameter which is generally slightly larger than the thickness of the sensor portion 10.

Then, the fixing end 11 of the sensor unit 10 is fitted to the fixing unit 22 of the housing 20 and fixed by means such as an adhesive.

As shown in Figure 2, the temperature sensor using the shape memory alloy of the present invention, as shown in (a), maintains the second shape to be curved within a predetermined transformation temperature, the sensor unit 10 from the outside When the furnace temperature is transmitted and exceeds the predetermined transformation temperature, the free end 12 of the sensor unit 10 moves while drawing a finite arc (m). Therefore, as in (b), the sensor unit 10 is returned to the first shape to have a straight shape, and is placed in the temperature checking hole 23 of the housing 20. In this case, the user of the temperature sensor using the shape memory alloy of the present invention can visually check the surface of the sensor unit 10 through the temperature checking hole 23 from the outside.

As shown in Figure 3a, the housing 20 of the temperature sensor of the present invention is attached to a predetermined position of a container or packaged product 30 containing blood, medicine, or products requiring careful temperature control.

As shown in FIG. 3B, when the packaged product 30 is abnormally exposed to a critical temperature (transformation temperature) or more during distribution and storage, the sensor unit 10 of the temperature sensor which receives heat transfer together with the packaged product 30. Is restored from the second shape to the original first shape, and thus, the surface of the sensor portion 10 becomes externally identifiable through the temperature checking hole 23 of the temperature sensor. Therefore, the user can easily confirm that the packaged product 30 is in an unstable state due to exposure to abnormal temperature, thereby preventing inadvertent use of the packaged product 30.

The temperature sensor using the shape memory alloy of the present invention has a slim plate shape, the configuration is very simple and easy to attach, there is an effect that can be used simply.

In particular, as shown in FIGS. 4 to 6, the sensor unit 10 as described in detail above may further include a rectangular display unit 13 and a circular display unit 14 that can improve the user's identification power. The display parts 13 and 14 form coupling holes 15a and 15b corresponding to the diameters of the sensor part 10 at the axial center in the planar direction, and are forcibly fitted to the free end 12 of the sensor part 10. Combined.

The display units 13 and 14 thus coupled have a larger area than the temperature checking hole 23 formed in the housing 20 of the temperature sensor. In addition, the display units 13 and 14 are manufactured to have a light weight to move together with the sensor unit 10. In addition, the display parts 13 and 14 may be integrally formed to have a color when plastic molding so as to have more effective identification, or may have a sticker or the like having a reflected light or color on the surface.

Such display portions 13 and 14 move together with the sensor portion 10 when the sensor portion 10 is abnormally exposed to a temperature higher than the critical temperature, so as to completely cover the temperature checking hole 23 formed in the housing 20. Therefore, since the presence or absence of the display portions 13 and 14 appears in the entirety of the temperature checking hole 23, the user can be more sure whether or not the damage to the contents of the product that requires the low temperature maintenance with the temperature sensor of the present invention from the outside. There is an effect that can be distinguished.

Second Embodiment

The temperature sensor using the shape memory alloy of the present invention described in this embodiment is a multi-type temperature sensor, except for arranging a plurality of sensor parts, and having first and second operation control parts for preventing malfunction of the sensor part during normal temperature distribution. Is largely similar to the technique of the first embodiment. Thus, descriptions of identical or corresponding components will be omitted herein.

7 is a perspective view for explaining the configuration of the temperature sensor using a shape memory alloy according to a second embodiment of the present invention, Figure 8 is a bottom view for explaining the operation relationship of the temperature sensor using a shape memory alloy to be. 9 is an exploded perspective view for explaining a configuration of a temperature sensor using a shape memory alloy having a first operation control unit, and FIG. 10 is a perspective view for explaining a coupling relationship of the first operation control unit. 11 is a separate bottom view of the second operation control unit, FIG. 12 is a bottom view for explaining a coupling relationship of the second operation control unit, and FIG. 13 is a shape memory alloy in which a plurality of sensor units are arranged in a horizontal direction. The bottom view for explaining the operating relationship of the temperature sensor using the.

As shown in FIG. 7, the temperature sensor according to the second embodiment of the present invention is a multi-type temperature sensor, and a plurality of temperature checking holes 23a are spaced at a predetermined interval in a relatively wide rectangular flat housing 20a. It is formed while maintaining.

In addition, the plurality of sensor units 10 are to be restored at different transformation temperatures through different shape memory processing (heat treatment). In addition, characters or characters 25 are formed around each of the temperature checking holes 23a to check the temperature step by step so that the user can recognize the damage to the contents of the product to which the temperature sensor is precisely attached. have.

Here, the letters 25 are respective transformation temperatures for the plurality of sensor units 10 made of a shape memory alloy, for example, 'A' is 10 to 15 ° C, and 'B' is 15 to 20 ° C. 'C' is 20 to 25 ° C, and 'D' is 25 to 30 ° C, and these transformation temperatures are not limited in the present invention because they can be adjusted to a desired size by the shape memory process of the shape memory alloy. .

As shown in (a) of FIG. 8, a single rectangular mounting groove 21 formed in the bottom surface of the housing 20a has a plurality of sensor units 10 opposite to each of the aforementioned temperature checking holes 23a. Fixing portions 22a to 22d are formed to fix each, respectively.

The sensor portions 10 fixed to the fixing portions 22a to 22d respectively maintain almost the same second shape. In this case, as shown in (b), when abnormal external heat is transmitted to the sensor units 10 by the external temperature change, and the respective transformation temperatures have been reached, the sensor units 10 are sequentially shaped. The display portion 13 of the sensor portion 10 covers the temperature confirming holes 23a individually, respectively. Therefore, the user can grasp the transformation temperature bands transmitted to the temperature sensor through the opening / closing of the temperature checking holes 23a and the letters 25 adjacent thereto.

As shown in FIG. 9, the temperature sensor according to the second embodiment includes a first operation control unit 40 for the sensor unit 10 coupled to the upper surface of the housing 20a ′. The first operation control unit 40 is formed in a band shape, by forming a plurality of first projections 41 on the lower surface, it serves to prevent the malfunction of the sensor unit 10 at room temperature distribution.

First protrusion coupling holes 26 corresponding to the first protrusions 41 are formed on the upper surface of the housing 20a ′ to which the first operation control unit 40 is coupled. Here, the position where the first projection coupling holes 26 are formed is formed at a position that prevents all the sensor units 10 having the second shape from being restored to the first shape even under abnormal temperature changes.

As shown in FIG. 10, the first operation control unit 40 is coupled to the upper surface of the housing 20a 'or to the lower surface of the housing 20a' as necessary, and the first protrusions 41 are connected to the first protrusion coupling holes 26. Each is inserted into the field. In addition, the first protrusions 41 of the first operation control unit 40 are positioned in front of the moving direction of the respective sensor units 10 to control the malfunction of the temperature sensor before being attached to the specific product.

11 and 12, the temperature sensor according to the second embodiment of the present invention further includes a belt-shaped second operation controller 50 that plays the same role as the first operation controller 40. It can be provided. To this end, the housing 20a "of the temperature sensor forms a plurality of second projection engaging holes 27 on the side of the display portion 13 of the sensor portion 10. In addition, the second operation control portion 50 is The second projections 51 respectively inserted into the two projection coupling holes 27 are integrally formed, wherein the second projections 51 form the first inclined surfaces 52 each having one side inclined. have.

When the second operation control unit 50 is coupled to the housing 20a ", the second protrusions 51 are inserted into the second protrusion coupling holes 27, respectively, and at this time, the first of the second protrusion 51 The inclined surfaces 52 are interviewed with the display units 13 of the sensor unit 10, respectively, to control the malfunction of the temperature sensor before being attached to a specific product.

The first operation control unit 40 and the second operation control unit 50 are separated from the housings 20a 'and 20a "after the temperature sensor is attached to the actual specific product. Therefore, the sensor units 10 are locked. Since the first and second operation control units 40 and 50, such as, are removed, it is possible to perform a natural temperature measurement operation.

As shown in FIG. 13, the multi-type temperature sensors according to the second exemplary embodiment of the present invention form spaces 21a to 21d separated by zones on the bottom of the housing 20b extending in the longitudinal direction, respectively. A plurality of sensor units 10 are installed in each. Such multi-type temperature sensors can measure the distribution of temperature transmitted through a relatively large area of a specific product, and thus are used more effectively in a package containing a plurality of specific products, such as a large packaging box. There is an effect that can determine whether the contents are damaged.

In addition, since the housing 20b can form a larger number of separate spaces 21a to 21d in the housing 20b when applied to a predetermined package requiring four or more sensor units 10, the present description will be described. The number of separated spaces 21a to 21d is not limited.

Further, although the housing 20b is not shown in the drawings, it is a matter of course that the operation control unit of the same type as the first and second operation control units 40 and 50 described above can be mounted.

Third Embodiment

The temperature sensor using the shape memory alloy of the present invention described in this embodiment is the first or the other except that a plurality of sensor units are arranged in a circular shape inside the circular housing, and additionally, a third operation control unit is further provided. This is similar to the description of the second embodiment. Therefore, descriptions of the same or corresponding components will be omitted here.

14 is a perspective view for explaining a configuration of a temperature sensor using a shape memory alloy according to a third embodiment of the present invention, Figures 15 to 17 is a view of the temperature sensor using a shape memory alloy shown in FIG. These are the bottom views for explaining the coupling relationship.

First, as shown in Figure 14, the temperature sensor according to the third embodiment of the present invention is installed on the inner surface of the circular housing 70 disposed on the upper part of the vial 60, such as a vial (vial). Here, the vial 60 is a sterile, antimicrobial rubber stopper (not shown) that is fitted to the inner diameter of the inlet, and the sleeve is made of silver (silver) or aluminum to prevent the stop of the stopper ( Not shown) and a circular cap (not shown) made of plastic or aluminum fixed to surround the sleeve. Accordingly, the circular housing 70 of the present invention is disposed and fixed on top of the circular cap fixed to surround the sleeve. In addition, the circular housing 70 may be designed in a shape surrounding the sleeve in place of the circular cap.

In particular, the upper surface of the circular housing 70 is formed with a temperature confirmation hole 23b for allowing the user to identify the storage state of the contents.

As shown in FIG. 15, the bottom core of the circular housing 70 is formed so that the shaft core 71 protruding at a predetermined height protrudes, and the circumferential surface of the shaft core 71 has a high F shape. A government 22e is formed.

The fixing unit 22e fixes the fixing end of the sensor unit 10 in the manner described in detail in the above embodiments.

Accordingly, the sensor unit 10 is based on an imaginary straight line passing through the fixing unit 22e and the temperature checking hole 23b with the display unit 13 coupled to the free end, as shown in the diagram (a) on the left. The second shape is maintained while being bent downward. When heat is transferred from the outside to the transformation temperature of the sensor unit 10 or more, as shown in the diagram (b) of the right side, the heat is restored to the first shape having a straight line shape, and the hole for confirming the temperature 23b is displayed on the display unit 13. As a result, the user can easily determine whether the drug injected into the vial is altered and stored.

As shown in Figs. 16 and 17, the circular housings 70 'and 70 "of the temperature sensor according to the third embodiment have two and six sensors at the fixing portions 22e of the shaft center 71 in advance. The parts 10 are coupled to each other, and the upper surface is formed with the temperature checking holes 23b for allowing the user to identify the storage state of the contents in the same manner as described in the above embodiments.

In addition, characters 25 are formed on the upper surfaces of the circular housings 70 'and 70 ", which are opposite to the bottom surface as shown, to identify the transformation temperature to the user.

Here, the characters 25 are the respective transformation temperatures for the plurality of sensor units 10 made of the shape memory alloy, as described above. For example, 'A' is 10 to 15 ° C. and 'B'. Is 15 ~ 20 ℃, 'C' is 20 ~ 25 ℃, 'D' is 25 ~ 30 ℃, 'E' is 30 ~ 35 ℃, 'F' is 35 ~ 40 ℃, and these transformation temperatures are also shape memory Due to the different shape memory processing of the alloy is adjusted to the temperature band desired by the user, by the presence or absence of opening and closing of the temperature confirmation hole 23b due to the display portion 13, to determine the temperature delivered to the vial, and therefore, It is possible to more precisely identify whether the medicine injected into the vial is altered and stored.

As shown in FIG. 18, the temperature sensor according to the third embodiment of the present invention also has a third projection coupling hole that maintains a predetermined interval in a circular shape on the upper surface of the circular housing 70 as in the previous embodiments. By forming the 28 portions, the third operation controller 80 having the third protrusions 81 capable of controlling the movement of the sensor units can be combined.

In particular, the third operation control unit 80 formed with the handle 82 has the effect of being able to easily and comfortably bind and detach by the user.

Fourth Embodiment

The temperature sensor using the shape memory alloy of the present invention described in this embodiment is very similar to the technology of the other embodiments except for the push button type fourth operation control unit formed in the circular housing and the display unit having the protruding jaw. Thus, descriptions of identical or corresponding components will be omitted herein.

As shown in FIG. 19, the sensor portion 10 is coupled to the fixing portion 22e of the shaft center portion 71 in the circular housing 70 having the temperature checking hole 23b. A display portion 13a having a protruding jaw 13b is fitted to the free end of the sensor portion 10, and the display portion 13a is constrained by the fourth operation control portion 90.

That is, the fourth operation control unit 90 has an operation groove 99 formed by cutting a predetermined portion of the upper portion of the circular housing 70 in a 'c' shape, and the fourth operation control unit 90 for more effective release operation. The push button 91 is integrally formed on the upper surface of

FIG. 20 is an enlarged cross-sectional view of a portion of the fourth operation control unit 90 and the circular housing 70 cut along the line A-A ', and illustrates the coupling relationship and the operation relationship in detail.

The fourth operation control unit 90 has an elastic force by the material in the operation groove 99, and when the user presses the push button 91, it can move up and down based on the hinge groove 92.

In particular, the end portion of the fourth operation control unit 90 has a stepped cross section inside the operation groove 99, through which the protruding jaw 16b of the display portion 13a can be detached from the fixed jaw 94. .

That is, the second inclined surface 93 is formed at the end of the fourth operation control unit 90 in the stepped lower end portion. The first inclined surface 93 and the third inclined surface 13c, which is a sliding treatment, are formed on the protruding jaw 16b of the display portion 13a. Here, the display portion 13a is coupled to the sensor portion 10 made of a shape memory alloy. Therefore, the display portion 13a is subjected to an elastic force of a predetermined size by the superelastic effect of the sensor portion 10.

Therefore, as shown in (a) and (b) of FIG. 20, when the user presses the push button 91 downward (f), the display portion 13a moves downward and at the same time, the second inclined surface ( 93 and the third inclined surface 13c slide and move slightly toward the temperature confirming hole 23b (h).

The elastic force is a restoring force for moving the display portion 13a in the upward direction g by the superelastic effect of the sensor unit 10.

When the user removes the force pressed by the push button 91, the fourth operation control unit 90 returns to its original position, and at the same time, the restoring force by the material of the sensor unit 10 indicates the dotted line. The third inclined surface 13c of the protruding jaw 13b is in a sliding treatment relationship with the fourth inclined surface 95 formed on the locking jaw 94, thereby moving further toward the temperature confirming hole 23b. As shown in FIG. 20C, the display portion 13a having the protruding jaw 13b is completely separated from the operation groove 99.

As shown in (d) of FIG. 20, when a temperature higher than the transformation temperature is transmitted to the sensor unit 10, the sensor unit 10 is restored from the second shape to the first shape, and the temperature checking hole 23b. The display unit 13a is moved toward the side, and as a result, the user checks the display unit 13a, which covers the temperature checking hole 23b, with the naked eye 1 from the outside, and the contents inside the container equipped with the temperature sensor of the present invention. Identify the presence of deterioration and storage status.

As shown in Figure 21a and 21b, the push button type fourth operation control unit 90 used in the fourth embodiment of the present invention may be formed in a plurality of circular housings, through which a predetermined container (pill bottle) It is possible to know the temperature delivered to the detail in detail, and thus, it is possible to more precisely determine the presence or absence of alteration of the medicine injected into the container and the storage state.

As described in detail above, the temperature sensor using the shape memory alloy of the present invention has a relatively simple configuration, which is basically a wire-type sensor unit and a rectangular or circular housing, which is simple to manufacture, easy to store and attach, and relatively Economical production is possible.

In addition, the temperature sensor using the shape memory alloy of the present invention is equipped with a plurality of sensor units in a slim housing or a circular housing through a simple configuration in a plurality, and whether the contents of the product deteriorated by heat transmitted through a large area through it There is an advantage that can be accurately identified.

In addition, since the temperature sensor using the shape memory alloy of the present invention is equipped with a plurality of sensor parts having different transformation temperatures, and formed on the outer surface of the character or characters indicating different transformation temperatures, heat transfer by temperature There is an advantage that the status can be checked very easily.

In addition, the temperature sensor using the shape memory alloy of the present invention is provided with an additional operation control unit that can be easily installed, or maximize the user's convenience by the push button method, the advantage of preventing malfunction during the production of the product and transport at room temperature There is this.

Although the technical idea of the temperature sensor using the shape memory alloy of the present invention has been described above with the accompanying drawings, this is for illustrative purposes only and is not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

Claims (9)

In the temperature sensor using the shape memory alloy, A plurality of sensor parts having a second shape in which the wire of the shape memory alloy material is bent within a predetermined transformation temperature, and returning to a first shape which is originally in a straight line in a shape recovery temperature range exceeding the predetermined transformation temperature; , A fixing part is integrally formed to fix the sensor parts to the inner side, and the free end of the sensor part includes a housing having respective temperature checking holes formed on a working line passing by drawing an arc of a finite angle. Temperature sensor using the shape memory alloy characterized in that. The method of claim 1, Temperature sensor using the shape memory alloy, characterized in that the bottom surface of the housing is formed with a rectangular mounting groove having an area slightly smaller than the total area. The method of claim 1, And a display unit having a relatively larger area than the temperature checking hole is coupled to the free end of the sensor unit. The method of claim 1, The housing extends in the longitudinal direction, forms a space separated for each zone on the bottom surface, the temperature sensor using a shape memory alloy, characterized in that each of the plurality of sensor units 10 are installed in the space. The method of claim 1, The housing has a plurality of protrusion coupling holes formed on the front side and the side thereof, and due to the respective first and second protrusion portions inserted into the first and second protrusion coupling holes, the respective sensor portions have a second shape. A temperature sensor using a shape memory alloy, characterized in that coupled to the belt-shaped first, second operation control unit to prevent the return to the first shape. The method of claim 1, The housing may include third projection coupling holes each having a predetermined interval in a circular shape on an upper surface thereof, and a third operation control unit having third projections to control movement of the sensor units. Temperature sensor using shape memory alloy. The method of claim 1, The housing may further include a fourth operation control unit configured to fasten the protruding jaw of the display unit to the cut operation groove to restrict the operation, and to release the display unit from the housing by an integrated push button. Temperature sensor used. The method of claim 1, Characterized by the shape memory alloy, characterized in that formed around the temperature checking holes of the housing to check the temperature step by step to accurately recognize the damage of the product to the user. The method of claim 1, The housing may be disposed on the upper portion of the vial, the temperature sensor using a shape memory alloy that allows a plurality of shape memory alloys having different transformation temperatures to check the temperature of various stages.