JP2005214641A - Temperature sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature sensor, capable of preventing the propagation of stress to a heat-sensitive element due to the torsion of an end part at insertion and preventing the breakage etc. of a joint part between the heat-sensitive element and a terminal part in the temperature sensor to be inserted in a small space between case of a battery pack etc. and a cell for sensing temperatures. <P>SOLUTION: In the temperature sensor, a part is extended from one end of each of a pair of narrow metal plate parts to form external lead terminals, protrusion parts extended inward are provided for end parts of the other ends of the pair of narrow metal plate parts, and a lead frame has a pair of terminal parts connected to the protrusion parts. The heat-sensitive element is electrically joined to the terminal parts, and the whole upper surface and lower surface of the lead frame except part of the external lead terminals are coated with an insulating sheet. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a temperature sensor, and more particularly to a thin thermistor temperature sensor suitable for surface temperature detection using a lead frame.

  Conventionally, as a thin temperature sensor, there is a temperature sensor having a structure as disclosed in Japanese Patent Laid-Open No. 8-54292 (Patent Document 1) proposed by the present applicant. The temperature sensor disclosed in Patent Document 1 sandwiches a thermosensitive element such as a thermistor having a thickness approximately equal to the thickness of the metal plate portion in a sandwich portion formed at one end of a pair of narrow metal plate portions. The temperature sensor has a structure in which the holding portion and the electrode of the thermal element are soldered and then covered with an insulating sheet except for a part of the external lead terminal. Since the temperature sensor with this structure is a thin sheet sensor with a thickness of about 0.5 mm, it can be inserted in a narrow gap between the case of the battery pack and the battery cell and closely attached to the surface of the battery cell. There is an advantage that the temperature of the surface of the battery cell can be accurately detected.

  As a thin temperature sensor, a thermistor sensor having a structure as disclosed in Japanese Patent Laid-Open No. 6-3201 (Patent Document 2) has also been proposed. The thermistor sensor shown in Patent Document 2 is a thermistor formed on the ends of two lead wires that are patterned by etching a metal foil formed on a flexible tape made of an electrically insulating organic resin material, such as polyimide. This is a thermistor sensor having a structure in which a chip is connected and an electrically insulating organic resin material is vapor deposited or applied on the whole except for the other end portions of the two lead wires. Since the thermistor sensor having this structure is a structure in which the thermistor chip is placed on a thin metal foil, the thermistor element is sandwiched between the metal plate portions much thicker than the metal foil as in Patent Document 1. Compared to a temperature sensor that sandwiches the body, there is an advantage that stress is applied to the thermistor element body and the occurrence of defects such as breakage of the thermistor element body is small, and the responsiveness is excellent.

JP-A-8-54292 JP-A-6-3201

  However, in the temperature sensor having the structure disclosed in Patent Document 1, as described above, the thermistor used as the heat sensitive element is thinned to the thickness of the narrow metal plate portion, thereby forcing the completed temperature sensor into a narrow gap. When the sensor is inserted into the sensor, abnormal stress may be applied to the tip of the sensor, and this stress is transmitted to the thermistor element soldered to the clamping part through the narrow metal plate, and cracks are generated in the thermistor element. However, the resistance value has changed greatly, and in some cases, the thermistor body has been damaged and temperature detection has become impossible.

  Further, since the thermistor sensor disclosed in Patent Document 2 is formed by patterning a metal foil on a flexible tape, the pressure contact force with respect to the detection surface as the thermistor sensor is mainly acceptable. Only the elastic force of the flexible tape is used, and an appropriate contact pressure cannot be obtained with respect to the surface to be detected, so that the contact becomes unstable and accurate temperature detection cannot be performed. In addition, since the surface of the thermistor sensor that is electrically bonded by placing the thermistor sensor on the end portion of the lead wire made of metal foil is covered by vapor deposition or application with an electrically insulating organic resin material, the thickness of the film However, when the temperature sensor is inserted in a narrow gap, the organic resin material of the film is peeled off, or the film is broken by protrusions etc., and there is a problem in reliability such that electrical insulation cannot be maintained. .

  The present invention has been made in order to achieve the above-described problems. The invention of claim 1 is directed to an external lead terminal extending from one end of a pair of narrow metal plates, and the pair of narrow metals. A pair of projecting portions extending inwardly from each of the other end tips of the plate portion, a pair of terminal portions for mounting a thermal element connected to the pair of projecting portions, and the pair of terminal portions The temperature sensor is characterized in that the mounted and electrically bonded thermosensitive element is covered with an insulating sheet bonded via a resin adhesive except for a part of the external lead-out terminal. According to this configuration, the thermal element is disposed in the pair of protrusions formed at the tip portions of the pair of narrow metal plate portions and the inner terminal portion surrounded by the tip portions of the pair of narrow metal plate portions. And the protruding portion, the narrow metal plate portion, and the terminal portion are covered with a sheet having a certain thickness by the insulating sheet, and are heated and bonded with a resin adhesive, and the protruding portion, the narrow metal plate portion, the thermal element, and Since the terminal part is fixed, the insulation sheet may be peeled off when the temperature sensor is brought into contact with a high-temperature object to be detected, which is a problem with a temperature sensor coated with an insulation sheet using a conventional adhesive. Therefore, the contact surface between the heat-sensitive part of the temperature sensor and the detection object can always be maintained in a stable state, and accurate temperature detection can be performed. In addition, since the heat sensitive part has a structure in which the heat sensitive element is surrounded by the protruding part and the narrow metal plate part, for example, a completed temperature sensor is inserted into a narrow space between a case such as a battery pack and a cell. When it is going to be used, it can prevent damage to the thermal element due to twisting of the thermal sensor at the tip of the temperature sensor or excessive stress concentration on the thermal sensor, and can prevent damage to the joint between the thermal sensor and the terminal part. Therefore, the reliability of the temperature sensor can be improved.

  According to a second aspect of the present invention, a portion extending from one end of each of the pair of narrow metal plate portions is used as an external lead-out terminal, and the narrow width is formed at the tip of the other end of the pair of narrow metal plate portions. Each of the protrusions extending inside the metal plate portion is provided, a pair of terminal portions connected to the narrow metal plate portion surrounded by the pair of protrusion portions, and a pair of terminal portions that are mounted on the pair of terminal portions and electrically A temperature sensor, characterized in that a thermally bonded element is covered with an insulating sheet bonded via a resin adhesive except for a part of the external lead terminal. In the temperature sensor of this configuration, as in the invention of claim 1, the thermal element is disposed on the inner side surrounded by the protruding portion formed at the tip portion of the pair of narrow metal plate portions, and the protruding portion is formed by the insulating sheet. Since the narrow metal plate portion and the terminal portion are covered with a sheet having a constant thickness and are heat-pressed by a resin adhesive, the protruding portion, the narrow metal plate portion, the thermal element and the terminal portion are fixed. When the temperature sensor is brought into contact with a high-temperature object to be detected, which is a problem with a temperature sensor covered with an insulating sheet using an adhesive, the insulating sheet will not be peeled off. The contact surface with the object to be detected can always be maintained in a stable state, and accurate temperature detection can be performed. In addition, since the thermal element is surrounded by the protruding portion and the narrow metal plate portion, for example, the completed temperature sensor is inserted into a narrow space between a case such as a battery pack and a cell and used. Temperature sensor can prevent damage to the heat sensitive element due to twisting of the heat sensitive part at the tip of the temperature sensor or excessive stress concentration on the heat sensitive part, and breakage of the joint between the heat sensitive element and the terminal part. It is possible to improve the reliability.

  Further, the invention of claim 3 is directed to an external lead terminal extending from one end of the pair of narrow metal plate portions, and a recess provided inside each of the other end tips of the pair of narrow metal plate portions. The pair of terminal portions for placing the thermal element connected to the recess and the thermal element placed on and electrically joined to the pair of terminal portions are bonded via a resin adhesive The temperature sensor is covered with an insulating sheet except for a part of the external lead terminal. In the temperature sensor of this structure, a concave portion is provided at the tip portion of the pair of narrow metal plate portions, and a terminal portion connected to each narrow metal plate portion is provided in the concave portion, whereby the terminal portion is electrically connected. The bonded thermal element is surrounded by a narrow metal plate, and as in the case of claims 1 and 2, the thermal sensor is twisted at the tip of the temperature sensor or excessive stress concentration on the thermal element. Since the damage can be prevented and the junction between the thermal element and the terminal portion can be prevented from being broken, the reliability of the temperature sensor can be improved.

  According to a fourth aspect of the present invention, each of the pair of terminal portions to which the thermosensitive elements are electrically joined extends to the front ends of the pair of narrow metal plate portions and the pair of narrow metal plate portions. The temperature sensor according to claim 1, wherein the temperature sensor is disposed so as to be substantially surrounded by the protruding portion. According to this configuration, the thermal element has a structure substantially surrounded by the pair of narrow metal plate portions and the respective protruding portions, and when used as a temperature sensor, the thermal element is prevented from being twisted or bent at the tip. Since the included terminal portion is protected from external stress, disconnection of the thermal element can be prevented and a highly reliable temperature sensor can be obtained.

  The invention according to claim 5 is characterized in that a recess for mounting the thermal element is provided in a pair of terminal portions for electrically joining the thermal element. Temperature sensor. According to this configuration, the thickness of the completed temperature sensor can be reduced by placing the thermosensitive element in the recesses provided in the pair of terminal portions, and the detected object can be inserted into a portion having a smaller gap. . In addition, the provision of the depression has an advantage that the positioning of the thermal element during the assembly of the temperature sensor is facilitated.

The invention of claim 6 uses a thermosetting adhesive as a resin adhesive, and heat-presses the insulating sheet to heat-sensitive element, the narrow metal plate part, the external lead terminal, the protruding part, The temperature sensor according to claim 1, wherein the terminal portion is bonded and fixed.
The temperature sensor with this configuration is capable of firmly bonding the thermal element, narrow metal plate part, external lead terminal part, projecting part, terminal part and insulating sheet, so that the temperature of the object to be detected is relatively high. When used, the insulating sheet peels off due to the softening of the adhesive used to bond the conventional insulating sheet, and the fixed thin metal plate part fluctuates and external force is applied to the thermal element joined to the terminal part. In addition, the thermal element is not disconnected or dropped, and the reliability of the temperature sensor can be improved.

  As described above, in the temperature sensor according to the present invention, a portion extending from one end of each of the pair of narrow metal plate portions is used as an external lead terminal, and a tip portion of the other end of the pair of narrow metal plate portions. Each of the protrusions extending inward, a pair of terminal portions connected to the protrusions, and electrically connecting the thermal element to the terminal portions, except for a part of the external lead terminal, The upper and lower surfaces of the lead frame are entirely covered with an insulating sheet, and a thermal element is disposed on the inner side surrounded by the protruding portion formed at the tip portion of the pair of narrow metal plate portions, and the protruding portion, The narrow metal plate part, the terminal part, and the thermal element are bonded and fixed by the resin adhesive applied to the insulating sheet, and the narrow metal plate part is displaced due to the softening of the adhesive with the passage of time after mounting as in the past. So the temperature sensor is It is accurate temperature sensing the contact surface of the Nde and the temperature sensor without even that would the sensing object can be maintained in a plane. In addition, since the thermal element is surrounded by the protruding portion and the narrow metal plate portion, for example, the completed temperature sensor is inserted into a narrow space between a case such as a battery pack and a cell and used. Temperature sensor can prevent damage to the heat sensitive element due to twisting of the heat sensitive part at the tip of the temperature sensor or excessive stress concentration on the heat sensitive part, and breakage of the joint between the heat sensitive element and the terminal part. Reliability can be improved.

  In the temperature sensor of the present invention, a portion extending from one end of each of the pair of narrow metal plate portions is used as an external lead terminal, and the narrow width is provided at the tip of the other end of the pair of narrow metal plate portions. A lead frame having a pair of terminal portions connected to the narrow metal plate portion surrounded by the protrusion portions and provided with respective protrusion portions extending inward of the metal plate portion, the heat sensitive element being provided in the terminal portion The lead frame is covered with an insulating sheet except for a part of the external lead terminal, and is formed at the tip of a pair of narrow metal plate portions. The thermal element is disposed inside the projecting portion, and the projecting portion, the narrow metal plate portion, and the terminal portion are bonded and fixed by the insulating sheet, so that the narrow metal plate portion is distorted. There is no contact surface between the temperature sensor and the object to be detected. Becomes the surface, it is accurate temperature sensing. In addition, since the thermal element is surrounded by the protruding portion and the narrow metal plate portion, for example, the completed temperature sensor is inserted into a narrow space between a case such as a battery pack and a cell and used. Temperature sensor reliability by preventing damage to the thermal element due to twisting of the tip of the temperature sensor or excessive stress concentration on the thermal sensor, and preventing damage to the joint between the thermal sensor and the terminal. Can be improved. In addition, the thermal resistance is increased by narrowing the connecting part of the terminal part, and by forming the narrow metal plate part thinner than the external lead terminal, the heat received by the heat sensitive part is directed to the external lead terminal side. It is possible to prevent the escape and accurately detect the temperature of the detected object.

  Further, in the temperature sensor of the present invention, the pair of terminal portions to which the thermosensitive element is electrically joined extend from the tip end portions of the pair of narrow metal plate portions and the inside of the narrow metal plate portion. It is arranged so as to be substantially surrounded by each protrusion, and the thermal element has a structure substantially surrounded by a pair of narrow metal plate portions and each protrusion, and the tip when used as a temperature sensor Since the terminal portion including the heat sensitive element is protected from external stress against twisting and bending of the heat sensitive element, disconnection of the heat sensitive element can be prevented and a highly reliable temperature sensor can be obtained.

  In addition, the temperature sensor of the present invention is provided in the pair of terminal portions by providing the pair of terminal portions for electrically joining the thermosensitive elements with a recess for placing the thermosensitive element. Since the thickness of the completed temperature sensor can be reduced by placing the thermosensitive element in the depression, it is possible to insert the detected object into a portion having a smaller gap. In addition, the provision of the depression has an advantage that the positioning of the thermal element during the assembly of the temperature sensor is facilitated.

  Further, the temperature sensor of the present invention includes a heat sensitive element electrically joined to the terminal portion, and a lead frame composed of the narrow metal plate portion, the external lead terminal, the protruding portion, and the terminal portion. The entire upper and lower surfaces are covered with an insulating sheet coated with a thermosetting adhesive, and the entire surface is bonded by thermocompression bonding, so the thermal atmosphere and the lead frame can be firmly bonded to the insulating sheet. Even when used in places where the temperature fluctuates greatly or where the temperature of the object to be detected is high, disconnection or dropout of the thermal element due to peeling of the insulation sheet when adhesive is used to adhere the insulation sheet as in the past Therefore, the reliability of the temperature sensor can be improved.

  Hereinafter, embodiments of a temperature sensor according to the present invention will be described with reference to the drawings.

  FIG. 1A is a plan view showing an embodiment of a lead frame used in the temperature sensor of the present invention, and FIG. 1B is a perspective view showing the structure of the temperature sensor of the present invention using the lead frame. It is. FIG. 1C is a cross-sectional view taken along the line F-F ′.

  First, an outline of a lead frame used in the temperature sensor of this embodiment will be described with reference to FIG. In the figure, A is a lead frame formed by chemical etching or pressing a metal plate made of stainless steel, Kovar, nickel, nickel alloy or the like. In the belt-like portion 2 in which the sprocket holes 1 are formed at regular intervals, external lead-out terminals 3a ′ and 3b ′ extend from the belt-like portion 2 in the direction perpendicular to each other, and the width of the external lead-out terminals 3a ′ and 3b ′. Narrower narrow metal plate portions 3a and 3b are connected. As described above, a plurality of sets are provided in the belt-like portion 2 with the parallel narrow metal plate portions 3 a and 3 b connected to the external lead terminals 3 a ′ and 3 b ′ as one set. Protrusions 4a and 4b projecting inward are formed at the tips of the narrow metal plates 3a and 3b, and opposing terminal parts 5a and 5b connected to the projecting parts 4a and 4b are formed. Yes.

  FIG. 1B shows an embodiment of the temperature sensor of the present invention using the lead frame A. This temperature sensor is connected to the projecting portions 4a and 4b at the leading ends of the narrow metal plate portions 3a and 3b from the external lead terminals 3a 'and 3b' to the narrow metal plate portions 3a and 3b. Electrodes of the thermal element 6 such as a chip thermistor and a thin film thermistor are electrically joined to 5a and 5b, and the lead frame A and the thermal element 6 excluding a part of the external lead terminals 3a ′ and 3b ′ are made of polyimide resin. The heat-sensitive element 7 is sealed by heat and pressure bonding so that the entire front and back surfaces are sandwiched between the insulating sheets 7 and 7 ′. One surface of the insulating sheets 7 and 7 ′ to be used is coated with, for example, an epoxy-based thermosetting adhesive as the resin adhesives 8 and 8 ′, and the lead frame A excluding a part of the external lead-out terminals. Insulating sheets 7 and 7 'are arranged on the upper and lower surfaces of the heat sensitive element 6, and the insulating sheets 7 and 7' are heated and pressure-bonded, whereby the heat sensitive element 6, the lead frame A and the insulating sheets 7 and 7 'are attached. Insulating sheets 7 and 7 'are peeled off even when used at a high ambient environment temperature or a high detection temperature, and the lead frame A is disassembled and the thermal element is dropped or disconnected. The temperature can be detected accurately.

  A method for assembling the temperature sensor in the above embodiment will be briefly described. The lead frame A is temporarily transferred to the claw of the automatic feeding device through the sprocket hole 1 and conveyed to the printing device. In the printing apparatus, solder paste is applied to the terminal portions 5a and 5b by a screen printing technique. Next, the thermosensitive element 6 which is a chip component is conveyed from the automatic component conveying machine to the terminal portions 5a and 5b, and the electrodes of the thermosensitive element 6 are arranged on the terminal portions 5a and 5b to which the solder paste is applied. Next, the lead frame A is conveyed in a constant temperature atmosphere at around 260 ° C., the solder is melted at a high temperature, and the electrodes of the thermal element 6 and the terminal portions 5a and 5b are electrically joined. Subsequently, the lead frame A proceeds to an insulating sheet coating process, and insulation with resin adhesives 8 and 8 'applied on both sides of the lead frame A, leaving a part of the external lead terminals 3a' and 3b '. The heat sensitive element 6 and the lead frame A are covered with the insulating sheets 7 and 7 'and fixed by adhesion by setting them so as to be sandwiched between the sheets 7 and 7', and thermocompression bonding. Next, in the cutting step, cutting is performed in the vicinity of the end portions of the external lead terminals 3a 'and 3b' of the belt-shaped portion 2, and the insulating sheets 7 and 7 'are also cut individually to complete each temperature sensor.

  2A is a plan view showing the shape of a lead frame B used in another embodiment of the temperature sensor of the present invention. The arrangement of the pair of terminal portions 5a and 5b is the same as that of the lead frame A in FIG. Is different. FIG. 2B shows a perspective view of a temperature sensor assembled using this lead frame B. FIG. In this way, by arranging the connecting portions of the terminal portions 5a and 5b at positions where the projecting portions 4a and 4b face each other, the thermal element 6 can be arranged in parallel with the narrow metal plate portions 3a and 3b. A structure that is strong against twisting of the frame B can be obtained. Since the temperature sensor assembly method and other structures are the same as those in the first embodiment, a description thereof will be omitted.

  3A and 3B show another embodiment of the temperature sensor according to the present invention, which will be described with reference to the drawings. 3A is a plan view showing a lead frame C used in the temperature sensor of the present invention, and FIG. 3B is a perspective view showing a structure of the temperature sensor using the lead frame C. FIG. The heat sensitive element has a structure substantially surrounded by a pair of narrow metal plate portions and the respective protruding portions, and the terminal portions 5a and 5b are connected to the narrow metal plate portions 3a and 3b. When used as a temperature sensor, the terminal portion including the thermal element is protected from external stress against twisting and bending of the tip portion, so that the thermal sensor can be prevented from being disconnected and the temperature sensor can be made highly reliable. In addition, the code | symbol used the thing similar to above-mentioned Example 1,2.

First, an outline of a lead frame used in the temperature sensor of this embodiment will be described with reference to FIG. In the figure, C is a lead frame formed by chemical etching or pressing a metal plate made of stainless steel, Kovar, nickel, nickel alloy or the like. In the belt-like portion 2 in which the sprocket holes 1 are formed at regular intervals, external lead-out terminals 3a ′ and 3b ′ extend from the belt-like portion 2 in the direction perpendicular to each other, and the width of the external lead-out terminals 3a ′ and 3b ′. Narrower narrow metal plate portions 3a and 3b are connected. In this way, a plurality of sets are provided in the strip-shaped portion 2 with the parallel narrow metal plate portions 3a, 3b connected to the external lead terminals 3a ′, 3b ′ as one set. Protrusions 4a and 4b projecting inwardly are formed at the tips of the narrow metal plates 3a and 3b, and are connected from the narrow metal plates 3a and 3b surrounded by the projections 4a and 4b. Terminal portions 5a and 5b are formed. FIG. 3B is a perspective view of a temperature sensor assembled using the lead frame C of FIG.
In addition, since the assembly method of the temperature sensor in this embodiment is the same as that of Embodiment 1, it is omitted.

  Next, the temperature sensor shown in FIGS. 4A and 4B will be described. This temperature sensor is configured by forming the external lead terminals 3a ′ and 3b ′ and the narrow metal plate portions 3a and 3b of the above embodiment to have the same width, and a recess is formed at the tip of the narrow metal plate portions 3a and 3b. The electrode of the thermal element 6 such as a chip thermistor or a thin film thermistor is electrically joined to the terminal portions 5a and 5b connected from the narrow metal plate portions 3a and 3b of the concave portion, The heat sensitive element 6 is sealed by adhering the lead frame portion D excluding a part of the terminals 3a ′ and 3b ′ and the entire heat sensitive element 6 so as to be sandwiched between insulating sheets 7 and 7 ′ such as polyimide resin. As the resin adhesives 8 and 8 ′ for heat-bonding the insulating sheets 7 and 7 ′, for example, by using an epoxy thermosetting adhesive, the lead frame D, the thermal element 6 and the insulating sheets 7 and 7 ′ are strong. Therefore, even when used at a high detection temperature portion, the insulating sheet is peeled off and the lead frame D is fluctuated, so that the thermal element is not dropped or peeled off, and temperature detection can be accurately performed. The method for assembling the temperature sensor of this embodiment is the same as that of the first embodiment, and will not be described.

  Hereinafter, another embodiment of the temperature sensor according to the present invention will be described with reference to FIG. FIG. 5A shows a plan view of a lead frame E used in the temperature sensor of the present invention. FIG. 5B is a perspective view showing the structure of a temperature sensor using the lead frame E. FIG. In addition, the code | symbol used the same thing as the said Example.

First, an outline of the lead frame E used in the temperature sensor of the present embodiment will be described with reference to FIGS. 5 (a) and 5 (b). In the figure, E is a lead frame formed by chemical etching of a metal plate made of stainless steel, Kovar, nickel, nickel alloy or the like. In the belt-like portion 2 in which the sprocket holes 1 are formed at regular intervals, external lead-out terminals 3a ′ and 3b ′ extend from the belt-like portion 2 in the direction perpendicular to each other, and the width of the external lead-out terminals 3a ′ and 3b ′. Narrower narrow metal plate portions 3a and 3b are connected. As described above, a plurality of sets each including the parallel narrow metal plate portions 3 a and 3 b are provided in the belt-like portion 2.
Protrusions 4a and 4b projecting inwardly are formed at the tips of the narrow metal plates 3a and 3b, and terminal parts 5a and 5b are formed which are connected to the projecting parts 4a and 4b and face each other. Yes. The terminal portions 5a and 5b are provided with depressions 9a and 9b. The depressions 9a and 9b are formed by a method such as half etching.

  According to this configuration, as shown in FIG. 5 (b), the thickness of the completed temperature sensor can be reduced by placing the thermal element 6 in the recesses provided in the pair of terminal portions. It is possible to insert into a portion having a smaller gap. Further, providing the depressions 9a and 9b has an advantage that the thermal element 6 can be easily positioned when the temperature sensor is assembled.

  In each of the above embodiments, the thermal element used is a chip type, thin film type NTC thermistor or PTC thermistor, or a platinum thin film type thermal element made of a metal thin film.

The top view of the lead frame A used for the temperature sensor of this invention, the perspective view which shows the structure of the temperature sensor of this invention using this lead frame A, and FIG.1 (c) are F- of the temperature sensor of this invention. It is sectional drawing of the temperature sensor cut | disconnected by F '. (Example 1) FIG. 4 is a plan view of the shape of a lead frame B used for another temperature sensor of the present invention, and a perspective view showing the structure of the temperature sensor of the present invention using this lead frame B. (Example 2) FIG. 5 is a plan view of the shape of a lead frame C used for another temperature sensor of the present invention, and a perspective view showing the structure of the temperature sensor of the present invention using this lead frame C. Example 3 FIG. 6 is a plan view of the shape of a lead frame D used for another temperature sensor of the present invention, and a perspective view showing the structure of the temperature sensor of the present invention using this lead frame D. (Example 4) FIG. 4 is a plan view of the shape of a lead frame E used for another temperature sensor of the present invention, and a perspective view showing the structure of the temperature sensor of the present invention using this lead frame E. (Example 5)

Explanation of symbols

A, B, C, D, E Lead frame 1 Sprocket hole 2 Strip portions 3a, 3b Narrow metal plate portions 3a ', 3b' External lead terminals 4a, 4b Protruding portions 5b, 5b Terminal portions 6 Thermal elements 7, 7 'Insulating sheets 8, 8' Resin adhesives 9a, 9b

Claims (6)

  A pair of externally extending terminals extending from one end of the pair of narrow metal plate portions; a pair of projecting portions extending inward from each of the other end tips of the pair of narrow metal plate portions; and the pair of protrusions A pair of terminal parts connected to the part and a thermal element placed on and electrically joined to the pair of terminal parts by an insulating sheet bonded via a resin adhesive. A temperature sensor which is covered except for a part.   An external lead terminal extending from one end of the pair of narrow metal plate portions, a pair of projecting portions extending inward from each of the other end tips of the pair of narrow metal plate portions, and the pair of thin metal plates. A pair of terminal parts for placing a thermal element connected to the tip of the width metal plate part, and a thermal element placed on and electrically joined to the pair of terminal parts, via a resin adhesive A temperature sensor characterized in that it is covered with an insulating sheet bonded to the outside except for a part of the external lead terminal.   One end of the pair of narrow metal plate portions is used as an external lead terminal, a recess provided facing the inside of each of the other end tips of the pair of narrow metal plate portions, and a thermal element connected to the recess A pair of terminal portions for mounting the heat-sensitive element, and a heat-sensitive element placed on the pair of terminal portions and electrically joined to each other by an insulating sheet bonded via a resin adhesive. A temperature sensor which is covered except for a part.   The pair of terminal portions to which the thermosensitive elements are electrically joined are surrounded by a pair of projecting portions that extend to the inside of the pair of narrow metal plate portions and the tip portions of the pair of narrow metal plate portions. The temperature sensor according to claim 1, wherein the temperature sensor is arranged as described above.   5. The temperature sensor according to claim 1, wherein a recess for mounting the thermal element is provided in the pair of terminal portions for electrically joining the thermal element. 6. A thermosetting adhesive was used as the resin adhesive, and the insulating sheet was thermocompression bonded to bond and fix the thermal element, the narrow metal plate portion, the external lead terminal, the protruding portion, and the terminal portion. The temperature sensor according to claim 1, wherein:

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