JP2006092988A - Self-reset protection element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-reset protection element which is thin and small while having high strength and durability. <P>SOLUTION: This self-reset protection element has a substrate 2, a pair of lead terminals 4 provided on a temperature maintaining component, the facing surfaces of which are mutually separated while being connected to the temperature maintaining component, a movable electrode connected to a pair of the lead terminals 4 while having a making and breaking contact, a cover 10 to cover at least a part of a pair of the lead terminals 4 and the movable electrode, and a mold material 17 to cover the cover 10 and the substrate 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is used in power supply circuits, batteries, and other electronic devices, and is preferably used to prevent damage to these electronic devices due to overcurrent, abnormal heat generation, etc., and particularly easy to mount on batteries and power supply circuits. The present invention relates to a thin self-recovering protective element.

  In order to prevent the occurrence of an electronic crisis damage due to abnormal heat generation of a battery or a power circuit used in a mobile phone or the like, a thermal fuse is sometimes attached to the battery or the like.

  However, since the thermal fuse is blown off due to abnormal heat generation and parts must be replaced, a self-recovery protection element that cuts off the electrical conductivity and returns thereafter after abnormal heat generation has been used.

  As a self-restoring protection element, there is an element using a movable electrode called a bimetal in which metals having different temperature expansion coefficients are made into a multilayer. Normally, the movable electrode connects the terminals to each other to conduct current, and when abnormal heat is generated, the movable electrode warps due to the metal multilayer structure with a different coefficient of thermal expansion. Is protected (see, for example, Patent Document 1).

  FIG. 22 is a side view of a conventional self-recovering protection element, where 100 is a self-recovering protection element, 101 is a signal line, 102 and 103 are movable electrodes, 104 is a connection portion, 105 is a contact electrode, and 106 is a case. is there.

  The movable electrode 103 housed in the case 106 is normally in contact with the contact electrode 105, and current is conducted through the signal line 101. When an excessive current flows or abnormal heat generation occurs, the movable electrodes 102 and 103 have a volume that increases because the movable electrode 103 has a high coefficient of thermal expansion, and the movable electrodes 102 and 103 warp upward as a whole. Occurs. Therefore, contact with the contact electrode 105 is lost, current conduction is interrupted, and circuit protection is realized. When the temperature decreases and the expansion of the movable electrode 103 disappears, the contact with the contact electrode 105 is resumed, and the current conduction is resumed.

  However, in such a self-recovering protection element 100, a robust resin case or metal case by injection molding has been used to create a space for ensuring the movement of the movable electrodes 102 and 103. Cost and manufacturing man-hours. For this reason, the self-recovering protection element 100 itself is expensive (see, for example, Patent Document 2).

Therefore, an inexpensive casing using a thermoplastic resin film such as PEN (polyethylene naphthalate) is proposed.
Japanese Patent Laid-Open No. 6-119859 JP 2001-167754 A

  However, a cover using a thermoplastic resin film has a problem in that it is difficult to secure strength if the thickness of the thermoplastic resin film is reduced due to the demand for small and thin portable consumer devices such as portable devices and game machines. There is.

  Further, when a PTC heater is generally used as a temperature maintaining component, the PTC heater is ceramic, so that it is easily broken, and when the film thickness is reduced, there is a disadvantage that it does not have strength and breaks.

  The present invention is a self-recovering protective element that is desired to be mounted in a thin and small size, such as a battery pack and a power circuit, in particular, and a low cost, such as a portable device and an electronic device. An object of the present invention is to provide a self-recovering protection element that ensures sufficient case strength and durability while being a cover made of a resin film.

  The present invention relates to a substrate, a pair of lead terminals provided on the substrate and having opposing surfaces separated from each other, a movable electrode connected to the pair of lead terminals and having a separation contact, and a pair of lead terminals. A cover that covers at least a part and the movable electrode is provided, and the whole or a part of the cover is resin-molded.

  The present invention cuts off current conduction when abnormal heat is generated due to abnormal current, etc., and resumes conduction after the abnormal condition is resolved, preventing the influence on the electronic equipment properly, and no need to replace parts It can be.

  Furthermore, the casing can be formed easily and at low cost by performing resin film casing.

  Furthermore, by performing resin molding on the film casing, there is an effect that it is possible to ensure strength and durability even when the film casing is thin and small.

  Further, by performing the above-described molding, it is possible to improve the shielding property for preventing the entry of humidity and the like, and it is possible to make a higher quality part.

  Further, the above-described mold improves the shielding property, prevents contact corrosion of the self-recovering protection element, and can extend the life.

  In addition, the mold increases the durability to secure a space for moving the movable electrode in the protective element against the external stress applied to the self-recovering protective element, and the protective element itself can be molded over the entire circuit after the circuit is formed. It becomes easy.

  The mold can also improve the earthquake resistance when this protective element is used in a mobile product.

  Also, the mold can improve the component use environment or the heat resistance at the time of mounting than when only the film case is used.

  In addition, the effects of the film case and the resin mold can be realized by an insert molding case, but there is an effect that can be made cheaper than this construction method.

  With the above effects, it is possible to achieve downsizing, high reliability, and long life of electronic devices.

According to a first aspect of the present invention, there is provided a substrate, a pair of lead terminals provided on the substrate and having opposed surfaces separated from each other, and a movable electrode connected to the pair of lead terminals and having a separation contact And a self-recovering element having a cover that covers at least a part of the pair of lead terminals and the movable electrode, and molding the entire cover. The continuity is interrupted and the continuity is resumed after the abnormal state is resolved, so that it is possible to prevent the influence on the electronic equipment properly and to eliminate the need for replacement of parts, the casing is easy and the cost is low. However, even if it becomes thin and small, it is possible to ensure the case strength and durability that can secure the space where the movable electrode operates even if stress or vibration is applied to this self-returning element from the outside. Become. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved, and the function of preventing the invasion of corrosive gas, etc. is enhanced. I can plan.

  According to a second aspect of the present invention, there is provided a substrate, a temperature maintaining component provided on the substrate, a temperature maintaining component provided on the substrate, connected to the temperature maintaining component, and having opposing surfaces separated from each other. A pair of lead terminals, a movable electrode connected to the pair of lead terminals and having a separation contact, at least a part of the pair of lead terminals, the movable electrode, and a cover that covers the temperature maintaining component. This is a self-recovering element characterized by molding the whole. When abnormal heat is generated due to abnormal current, etc., the conduction of the current is cut off, and the conduction is resumed after the abnormal state is resolved. It is possible to eliminate the need to replace parts while preventing the effects appropriately, and temperature maintenance parts are placed between the lead terminals, and the movable electrode and cover are laminated from the board to sufficiently reduce the temperature. Until current conduction You can not carry out the resume. In addition, the casing is easy and low in cost, and even if it is thin and compact, it can secure a space where the movable electrode can operate even if stress or vibration is applied to the self-returning element from the outside. It is possible to ensure strength and durability. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and the quality of the self-recovering element of the present invention is improved. I can plan.

  The invention according to claim 3 of the present invention is provided between the substrate, the pair of lead terminals whose opposing surfaces are separated from each other, and the substrate and the pair of lead terminals, and is connected to each of the pair of lead terminals. A temperature maintaining component; a movable electrode connected to one of the pair of lead terminals and separable from the other lead terminal; and at least a part of the pair of lead terminals and a cover covering the movable electrode and the temperature maintaining component; A self-recovery protective element characterized by molding the entire cover. When abnormal heat is generated due to abnormal current, etc., the current conduction is cut off, and after the abnormal condition is resolved, the conduction is resumed, and the electronic equipment It is possible to eliminate the need to replace parts while properly preventing the impact on the device, and the temperature maintenance parts are arranged between the lead terminals, and the movable electrode and cover are laminated from the substrate, so that the temperature is sufficient Drop to It can not carry out the resumption of current conduction to. In addition, the casing is easy and low in cost, and even if it is thin and compact, it can secure a space where the movable electrode can operate even if stress or vibration is applied to the self-returning element from the outside. It is possible to ensure strength and durability. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and the quality of the self-recovering element of the present invention is improved. I can plan.

According to a fourth aspect of the present invention, there is provided a substrate, a temperature maintaining component provided on the substrate, a temperature maintaining component provided on the substrate, connected to the temperature maintaining component, and spaced apart from each other. A pair of lead terminals, a movable electrode connected to one of the pair of lead terminals and separable from the other lead terminal, and between the pair of lead terminals and the substrate and provided around the temperature maintaining component. At least one of the first intermediate reinforcing member provided or the second intermediate reinforcing member provided on the pair of lead terminals, at least a part of the pair of lead terminals, a cover that covers the movable electrode and the temperature maintaining component, A self-recovery protective element characterized by molding the entire cover. When abnormal heat is generated due to abnormal current, etc., the current conduction is cut off, and after the abnormal condition is resolved, the conduction is resumed, and the electronic equipment Suitable for impact on It is possible to eliminate the need for replacement of parts, and the temperature maintaining parts are arranged between the lead terminals, and the movable electrode and cover are laminated from the substrate, so that the current can be reduced until the temperature is sufficiently lowered. It is possible not to resume conduction. In addition, the casing is easy and low in cost, and even if it is thin and compact, it can secure a space where the movable electrode can operate even if stress or vibration is applied to the self-returning element from the outside. It is possible to ensure strength and durability. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and the quality of the self-recovering element of the present invention is improved. I can plan.

  The invention according to claim 5 of the present invention is the self-restoring protection element according to any one of claims 1 to 4, wherein the molding material is a thermosetting resin such as an epoxy resin. Even if stress or vibration is applied to the self-returning element from the outside, it is possible to secure a case strength and durability that can secure a space in which the movable electrode operates. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and the quality of the self-recovering element of the present invention is improved. I can plan.

  The invention according to claim 6 of the present invention is the self-recovering type according to any one of claims 1 to 5, wherein the molding material is a thermoplastic resin such as PPS (polyphenylene sulfite) or a liquid crystal polymer. It is a protective element, and it is possible to secure a case strength and durability that can secure a space in which the movable electrode operates even when stress or vibration is applied to the self-recovering element from the outside. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and the quality of the self-recovering element of the present invention is improved. I can plan.

  In the invention according to claim 7 of the present invention, the cover is a thermoplastic resin film such as PEN, and two layers such as a substrate and an upper cover substrate, or three layers of a substrate, an intermediate film and an upper cover. The self-recovering protective element according to any one of claims 1 to 6, wherein the protective film is formed by using the above film, and the casing is easy and can be reduced in cost. .

  According to an eighth aspect of the present invention, the substrate has at least a part of the pair of lead terminals, the length including the movable electrode, and a width wider than these, and the molding material is formed on the upper part at the time of molding. The self-recovering protective element according to any one of claims 1 to 6, which becomes a bottom during resin molding, can receive a molding material, and can simplify the molding.

  The invention according to claim 9 of the present invention is the self-restoring protection element according to any one of claims 1 to 8, wherein the molding material covers the entire cover during molding. Even if stress or vibration is applied to the self-restoring element, it is possible to secure a case strength and durability that can secure a space in which the movable electrode operates. Also, by molding, the gap in the film casing can be filled and reinforced, the shielding property is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and the quality of the self-recovering element of the present invention is improved. I can plan.

  The invention according to claim 10 of the present invention is characterized in that at least a part of the pair of lead terminals or the movable electrode is provided with a pressure-contact strengthening portion for improving the contact force at the separation portion of the movable electrode and the lead terminal. The self-recovering protection element according to any one of claims 1 to 9, wherein the self-recovering protection element is resistant to external stress and has high shielding properties, but is also resistant to vibration and chattering, and has higher quality. become.

According to the eleventh aspect of the present invention, the pair of lead terminals have a narrow portion that is narrower than the other portions in the portion connected to the cover and the portion connected to the movable electrode. The self-recovering protection element according to any one of claims 1 to 10, wherein the self-recovering protection element is resistant to external stress and has high shielding properties, but can be downsized.

  The invention according to claim 12 of the present invention is characterized in that the molding material has a thickness on the upper surface of the cover rather than the bottom surface of the substrate. The element is strong against an external stress from the upper surface direction, and the thickness of the entire self-recovering protection element can be reduced.

  According to a thirteenth aspect of the present invention, there is provided a step of installing a substrate, a step of bonding a pair of lead terminals whose opposing surfaces are separated from each other on the substrate, and a part of the movable electrode on one of the lead terminals. A method for manufacturing a self-recoverable protection element, comprising: a step of bonding; a step of forming a cover that covers a part of the lead terminal, the movable electrode, and the temperature maintaining component; and a step of molding the cover. In addition, the casing can be easily made at low cost, and even when stress or vibration is applied to the self-recovering element from the outside, it is possible to secure a case where the movable electrode can operate, and to ensure the case strength and durability. A thin self-restoring protection element can be manufactured. Also, by molding, the gaps in the film casing can be filled and reinforced, the shielding performance is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and a high quality thin self-recovering protective element is achieved. Can be manufactured.

  According to a fourteenth aspect of the present invention, a step of installing a substrate, a step of bonding a temperature maintaining component on the substrate, and a pair of lead terminals whose opposing surfaces are separated from each other are bonded on the temperature maintaining component. A step of bonding a part of the movable electrode to one of the lead terminals, a step of forming a cover that covers a part of the lead terminal, the movable electrode, and the temperature maintaining component, and a step of molding the cover A method of manufacturing a self-recovering protection element characterized by the above, and a space for the movable electrode to operate even if stress or vibration is applied to the self-recovering element from the outside while making the casing easy and low in cost. It is possible to manufacture a thin self-recovering protective element capable of ensuring the case strength and durability that can be achieved. Also, by molding, the gaps in the film casing can be filled and reinforced, the shielding performance is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and a high quality thin self-recovering protective element is achieved. Can be manufactured.

  According to a fifteenth aspect of the present invention, there are provided a step of installing a substrate, a step of bonding a temperature maintaining component on the substrate, a step of bonding a first reinforcing material around the temperature maintaining component, and a temperature maintaining component A pair of lead terminals whose opposing surfaces are spaced apart from each other, a step of mutually welding a first reinforcing material and a second reinforcing material provided on the lead terminal, and one of the lead terminals movable A step of joining the electrodes, a step of forming a cover which is welded to the second reinforcing material and covers a part of the movable electrode, the temperature maintaining component and the lead terminal, and a step of molding the cover. A method for manufacturing a self-recovering protection element, wherein a space in which a movable electrode can operate even if stress or vibration is applied to the self-recovering element from the outside while making the casing easy and low in cost. Case intensity which can be coercive can be produced a thin self-reset type protection device capable of ensuring durability. Also, by molding, the gaps in the film casing can be filled and reinforced, the shielding performance is improved and the function of preventing the invasion of corrosive gas, etc. is enhanced, and a high quality thin self-recovering protective element is achieved. Can be manufactured.

According to the sixteenth aspect of the present invention, there is provided a battery, a main body for storing the battery, a wiring led out from the main body and electrically connected to the battery, and provided between the wirings and in contact with the main body. A battery pack comprising: a self-recovering protection element, wherein the self-recovering protection element according to any one of claims 1 to 13 is used as the self-recovering protection element. It is possible to realize the protection of the device by shutting off.

  An invention according to claim 17 of the present invention is an electronic apparatus comprising the self-recovering protection element according to any one of claims 1 to 13, a power supply circuit, a processing circuit, and a control circuit. Thus, an electronic device that can prevent damage even at an abnormal temperature can be realized.

  Note that the self-recovery protection element in this specification is used as a bimetal switch, a temperature switch, a temperature sensor, or the like.

  In addition, the movable electrode in this specification is often a bimetal made of a plurality of metal layers having different temperature expansion coefficients, but other than this, the bimetal may have a two-layer structure, a three-layer structure, or more. It may have the following layer structure. Although described in this specification as a movable electrode, a bimetal piece is often used as a specific example thereof.

  The movable electrode is movable when one end of the movable electrode is fixedly connected and the other end moves basically up and down, and the tip of the contact electrode is provided on the surface of the lead terminal or the lead terminal. Mainly refers to the operation of making contact with or non-contacting. Of course, it may be one that moves in the lateral direction to make contact and non-contact.

Further, the temperature maintaining component refers to a component that maintains the temperature for a certain period of time, and particularly has a role of maintaining the high temperature state for a certain period of time when the temperature becomes high. In particular, the resistance value is low at low temperatures, and the resistance is high at high temperatures to maintain the high temperature state.
A Temperature Coefficient Thermistor (hereinafter referred to as “PTC”) is often used, and in this specification, PTC is described as an example of a temperature maintaining component.

  Further, as the molding material, any molding resin may be used as long as it is a material having a higher hardness than a resin film used for the cover by a thermoplastic resin or a thermosetting resin.

  Hereinafter, it demonstrates using drawing.

(Embodiment 1)
1 is a perspective view of a self-recovering protection element according to Embodiment 1 of the present invention, FIG. 2 is a side view of the self-recovering protection element according to Embodiment 1 of the present invention, and FIG. 3 is Embodiment 1 of the present invention. FIG. 6 is a side sectional view of the movable electrode in the first and second embodiments of the present invention.

  1 is a self-recovering protection element, 2 is a substrate, 4 is a lead terminal, 5 is a connection surface, 6 is a movable electrode, 6b is a separation contact, 7 is a fixed connection part, 8 is a contact electrode, 9 is a second reinforcing material, 10 is a cover, 12 is an inner layer, 13 is an electrode, 14 is an outer layer, 15 is an inner layer, 16 is an intermediate layer, and 17 is a molding material.

  First, details of each part will be described.

  First, the substrate 2 will be described. The substrate 2 and the like are shown in FIGS.

The substrate 2 is disposed on the bottom surface of the self-restoring protection element 1, and the form of the entire element and the strength are ensured. A ceramic plate such as alumina may be used as the substrate 2, but PET (polyethylene terephthalate) or PEN (polyethylene naphthalate), PPS (polyphenylene sulfite) or PEEK (polyethylene) may be used as long as it has sufficient strength. It may be formed of a thermoplastic resin film or a liquid crystal polymer mainly composed of ether ether ketone). When formed of these materials, there is an advantage that it is realized as a very thin and light weight.

  The substrate 2 is not limited to a rectangular plate shape, but may be a circular plate shape, an elliptical shape, a triangular shape, or a polygonal plate shape such as a pentagon or more.

  Next, the lead terminal 4 will be described.

  The lead terminal 4 is formed of an electrically conductive material, and is preferably a metal, specifically, at least one simple material selected from iron, nickel, copper, aluminum, gold, silver, and tin, or a metal material thereof. Or at least one simple substance selected from the above material group or a metal material containing an element other than the material group in the alloy can be used.

  It is also preferable to improve the conductivity and durability by performing single-layer or multi-layer plating or cladding treatment on the entire surface or a part of the surface.

  The lead terminals 4 are opposed to each other. If the distance between the lead terminals 4 is too small, even if the leading end of the movable electrode 6 is not in contact with the lead terminal 4, the lead terminals 4 are not conductive. There is a possibility that the terminals 4 are electrically connected to each other, which is inappropriate for circuit protection. For this reason, it is preferable that the opposing distance of the lead terminal 4 is a certain distance or more.

  The connection surface 5 is a portion for fixedly connecting one end of the movable electrode 6, and is provided at one tip portion of the lead terminal 4. In order to secure the connection strength of the fixed connection, it is preferable that the surface is exposed, and it is sufficiently connected so that the lead terminal 4 and the movable electrode 6 do not have high resistance by being connected with solder or metal paste. It is preferable to secure a large area.

  Next, the movable electrode 6 will be described.

  The movable electrode 6 is a member having a role of a switch in which the tip opposite to the fixed connection portion 7 comes into contact with or is not in contact with the lead terminal 4 by warping with temperature.

  The movable electrode 6 is formed of a multi-layered metal having different temperature expansion coefficients, usually called a bimetal. For example, the inner layer 15 facing the lead terminal is formed of a metal having a high temperature expansion coefficient, and the outer layer 14 is formed of a metal having a low temperature expansion coefficient. It is also preferable to form another intermediate layer 16 between the inner layer and the outer layer in order to ensure the strength and increase the agility of the movable operation. Two or more intermediate layers 16 may be present inside. It is also preferable to use a metal whose temperature expansion coefficient is lower than that of the inner layer 15 but higher than that of the outer layer 14 to make the warping and returning operations more agile.

  As the material of the movable electrode 6, in general, a Mn—Ni—Co alloy material is used on the high expansion side, and an Fe-Ni based invar alloy material is often used on the low expansion side. Other materials may be used.

  As another material of the movable electrode, a shape memory (alloy, resin) material is also preferably used.

FIG. 6 shows an immediate sectional view of the movable electrode. As shown in FIG. 6, it is also preferable to increase the pressure contact force when the tip contacts the lead terminal 4 by bending the movable electrode 6 to give elasticity such as springiness. Thereby, it is not necessary to use an extra spring material or spring parts, which contributes to miniaturization and cost reduction.

  Moreover, in the part to which the movable electrode 6 is connected, there is an advantage that it is easy to secure the position of the member for connection processing or the like by providing a cut-out at the corner. For example, an electric probe is applied to the cut corner and a current is passed through the lead terminal 4 and the movable electrode 6 to raise the temperature, thereby melting the connection melt sandwiched between the lead terminal 4 and the movable electrode 6. Thus, the connection can be easily realized. This is an effective technique as the device becomes smaller.

  Next, the fixed connection portion 7 will be described.

  The fixed connection portion 7 is a portion that fixedly connects one of the lead terminals 4 and one of the movable electrodes 6. One end of the movable electrode 6 is securely fixed to the lead terminal 4, and the lead terminal 4 and the movable electrode 6 are connected to each other. Electrical continuity is ensured. The connection may be by soldering or metal paste. As described above, a welding metal is sandwiched between the movable electrode 6 and the fixed connection portion 7 in advance, and a current probe is applied to the lead terminal 4 to apply current. The lead terminal 4 and the movable electrode 6 are connected by flowing and generating heat to melt the welding metal.

  At this time, by cutting off the four corners of the movable electrode 6, a space for applying the current probe to the lead terminal 4 is ensured, and in addition to the reliable welding, welding of an intermediate reinforcing material formed of a film or the like is performed. The current probe installation space at the time is also used.

  Next, the contact electrode 8 will be described.

  The contact electrode 8 may be attached to the tip of the movable electrode 6, may be attached to a portion of the lead terminal 4 in contact with the tip of the movable electrode 6 on the movable side, or may be attached to both of them. The contact electrode 8 is often formed by a convex portion such as a hemispherical shape, and a metal layer is formed on the surface thereof, and plating or the like is performed. Further, in order to deal with contact and non-contact repeatedly, it is also preferable to increase the thickness of the plating layer or increase the thickness of the contact electrode 8, the movable electrode 6 that contacts the contact electrode, or the contact portion of the lead terminal 4. Further, the contact electrode 8 may not be formed as a convex portion as shown in FIG. 2, and the movable electrode 6 and the lead terminal 4 may be in contact with each other at the tip, but there is a contact electrode 8 formed of the convex portion. As a result, the movable electrode 6 and the lead terminal 4 can be reliably contacted and low-resistance conduction is possible.

  The thickness of the contact electrode 8 is preferably set to a thickness that does not interfere with the movable region in the vertical direction away from the lead terminal 4 of the movable electrode 6, and by ensuring a sufficient surface area for contact, It is preferable to reduce the resistance.

  In order to further enhance the durability of the contact electrode 8, it is also preferable to use a metal that is harder than the metal used for the movable electrode 6 and the lead terminal 4. When the contact electrode 8 is formed only on the movable electrode 6 side, the plating thickness or metal thickness of the lead terminal 4 in contact with the lead terminal 4 is increased, and conversely, the contact electrode 8 is formed only on the lead terminal 4 side. In the case where is formed, it is also preferable to increase the plating thickness or metal thickness of the portion of the movable electrode 6 that contacts the movable electrode 6.

  In FIG. 3 and the like, a configuration is shown in which one of the movable electrodes 6 is fixedly connected to one of the lead terminals 4 and the other is separable from the lead terminal 4.

  Next, the cover 10 will be described.

  FIGS. 1 and 2 show a case where the cover 10 is covered.

  The cover 10 covers almost the entire self-restoring protection element 1 and is used to ensure the shape and durability of the element. The cover 10 covers at least a part of the movable electrode 6 and the lead terminal 4, and accordingly, the contact electrode 8 and the fixed connection portion 7 are also covered.

  It is preferable that the cover 10 can secure at least a movable region in which the movable electrode 6 operates. In addition, when the molding material 17 is applied on the cover 10, it is necessary to have a strength for securing a movable region of the movable electrode. When there is no movable region, it becomes difficult for the movable electrode 6 to warp upward and become non-contact, and therefore it is preferable that the movable electrode 6 has a strength capable of securing a certain shape. For example, it is also preferable to provide chamfering (R) on the peripheral side surface of the cover 10 to improve strength, or to increase the thickness of the portion to be bent than other portions, or to provide chamfering to improve strength.

  Further, the cover 10 is welded and connected on the outer periphery of the substrate 2 and the lead terminal 4 to cover the element by the cover 10, and the molding material 17 does not enter the movable region of the movable electrode 6 during molding.

  Next, the molding material 17 will be described.

  The mold of the self-restoring protection element 1 is used to secure a space for the movable electrode 6 to move when an external pressure is applied to the self-restoring protection element 1 itself or when an external force is applied at the same time as the temperature rises. There is no problem as long as the purpose is achieved even if the entire case is molded or partially molded.

  The mold material used here is a resin that can be worked at room temperature, such as a one-pack or two-pack type epoxy resin and a nylon resin that can be worked at about 150 ° C., and a resin whose height is increased by curing with a liquid at the time of application. Can be used.

  By using such a resin, there is an advantage that it is easy to mold. Moreover, since only the adhering material is required, the material use efficiency is good and the cost can be reduced.

  Since the above-described mold effect may be achieved, a ceramic plate such as alumina or a metal plate such as aluminum may be attached to the entire case or a part using an adhesive depending on the purpose.

  Molding the self-recovering protection element 1 increases the case strength and improves the earthquake resistance and heat resistance.

  The molding method includes preliminarily putting a part to be molded of the self-recovering protection element 1 into the prepared mold, pouring a mold resin into the gap between the mold and the self-recovering protection element 1, and then applying conditions appropriate to the resin. (Temperature, time) Curing method, Applying liquid resin with a brush, then curing under moderate curing conditions, Sprinkling powdered resin after coating, heat resistance, bending strength A resin material having high heat resistance strength is molded on the case by various methods that can be formed, such as sticking a high resin seal on the case.

  As a result, the heat resistance and strength of the self-restoring protection element 1 can be increased. Moreover, mounting property can be improved by ensuring the flatness of the bottom surface and the front surface.

  FIG. 1 and FIG. 2 show a case where it is covered with a molding material 17.

  The molding material 17 covers almost the whole other than the part of the lead terminal 4 of the self-restoring protection element 1 or almost the whole part other than the part of the lead terminal 4 and the bottom surface portion of the substrate 2. Used to ensure sex.

  The material of the molding material 17 is a thermoplastic resin mainly composed of a resin called PPS (polyphenylene sulfite), PEEK (polyether ether ketone), or a liquid crystal polymer, even a thermosetting resin such as epoxy resin, phenol resin, or polyimide. Resin may be used.

  In addition, it is also effective to increase the strength by inserting a fibrous material such as carbon fiber or glass fiber into the resin as a filler.

  Next, the reinforcing material will be described.

  The second reinforcing material 9 is used to improve the bonding strength between the cover 10 and the lead terminal 4.

  By welding each other on the outer periphery of the second reinforcing member 9 and the lead terminal 4, a force for sandwiching the lead terminal 4 is increased, and a cover 10 is added thereto to realize a device that can secure a sufficient strength while being thin. be able to.

  Next, as shown in FIGS. 1 and 2, the second reinforcing member 9 is formed on the lead terminal 4 and at a position outside the fixed connection portion 7 and the contact electrode 8. The second reinforcing material 9 realizes space securing and strength securing of the internal space formed by the cover 10.

  1 and 2, the second reinforcing member 9 is also used as a welding intermediary part for interconnecting the substrate 2 and the cover 10, so that the main body configured based on the substrate 2 and the cover 10 is movable. A space in which the movable region of the electrode 6 is secured is formed.

  In particular, when the cover 10 is formed of a resin film or the like, the second reinforcing material 9 as the intermediate layer is effective because the metal lead terminals 4 cannot be directly welded. There are also benefits.

  Here, like the substrate 2, the cover 10 and the second reinforcing material 9 are respectively or at least partially PET (polyethylene terephthalate) or PEN (polyethylene naphthalate), PPS (polyphenylene sulfite) or PEEK (polyether ether). It may be formed of a thermoplastic resin film having a ketone as a main component or a liquid crystal polymer. When formed of these materials, there is an advantage that it is realized as a very thin and light weight.

  Polyimide is also preferably used. This is the same for any of the substrate 2, the second reinforcing member 9, and the cover 10.

(Embodiment 2)
4 is a side view of the self-recovering protection element according to the second embodiment of the present invention, and FIG. 5 is a perspective view of the PTC according to the second embodiment of the present invention.

DESCRIPTION OF SYMBOLS 1 is a self-recovering protective element, 2 is a board | substrate, 3 is a temperature maintenance component, 4 is a lead terminal, 5 is a connection surface, 6 is a movable electrode, 7 is a fixed connection part, 8 is a contact electrode, 9 is a 2nd reinforcement material Reference numeral 10 denotes a cover, 11 denotes a first reinforcing material, 12 denotes an inner layer, 13 denotes an electrode, 14 denotes an outer layer, 15 denotes an inner layer, 16 denotes an intermediate layer, and a molding material.

  Here, the components other than the temperature maintaining component 3 and the first reinforcing material 11 are the same as those described in the first embodiment.

  First, the temperature maintaining component 3 will be described.

  FIG. 4 shows a side view of the self-restoring protection element 1 using the temperature maintaining component 3.

  The temperature maintaining component 3 is used for adding the self-holding function of the self-recovering protection element 1 to the element.

  With the self-holding function, when the movable electrode 6 warps due to heat generation and the contact electrode 8 is separated from the lead terminal 4, current flows from the lead terminal 4 to the temperature maintaining component 3, and the temperature maintaining component 3 generates heat. Here, since the temperature maintaining component 3 has a Curie point at which the resistance rapidly increases and no current flows at around 100 ° C., the temperature does not rise beyond that and the temperature is maintained. Further, at this temperature, no current flows through the temperature maintaining component 3 due to the action of the Curie point, current conduction between the lead terminals 4 does not occur, and the current remains cut off. Since the maintained temperature is also conducted to the movable electrode 6, the movable electrode 6 also warps for a while, and the state where the contact electrode 8 is separated from the lead terminal 4 is maintained and the normal current is interrupted. Function.

  The temperature maintaining component 3 has a slightly higher resistance in normal times than metals such as other lead terminals 4 and movable electrodes 6, and most of the current flows from the lead terminals 4 through the movable electrodes 6 in the normal state. It flows to one lead terminal 4. In this state, almost no current flows through the temperature maintaining component 3 and little heat is generated.

  Here, as the temperature maintaining component 3, a so-called “Positive Temperature Coefficient Thermistor” (hereinafter referred to as “PTC”) is often used, and a PTC formed in an arbitrary shape is disposed on the substrate 2. .

  In addition, in connection with the temperature maintaining component 3 and the lead terminal 4, in addition to the connection by solder or metal paste, in order to prevent breakage or damage during work, so-called crimping or pressure welding that is electrically conducted by close contact is used. It is also preferred that

  Next, the reinforcing material will be described.

  The 1st reinforcement material 11 and the 2nd reinforcement material 9 are provided as needed.

  As shown in FIG. 4, the first reinforcing member 11 is provided between the substrate 2 and the lead terminal 4, and is used to secure the strength of the surroundings while forming a space for arranging the temperature maintaining component 3. . As shown in FIG. 2, when a space for placing the temperature maintaining component 3 is provided in the bent space by bending the middle portion of the lead terminal 4, the substrate 2 and the lead terminal 4 are in direct contact with each other. It is not necessary to secure an arrangement space for the temperature maintaining component 3. However, even in such a case, it is also preferable to use the first reinforcing material 11 in order to improve the strength.

Further, in the case as shown in FIG. 4, in addition to securing the arrangement space for the temperature maintaining component 3, if a non-filling space is generated between the lead terminal 4 and the substrate 2, the lead terminal 4 and the temperature maintaining component 3. Since the problem that the durability of the connection to the surface becomes weak also occurs, it can be suitably used as a reinforcing material for preventing this and improving the strength.

  Furthermore, the force which pinches | interposes the lead terminal 4 and the temperature maintenance component 3 becomes strong by welding the 1st reinforcement material 11 and the 2nd reinforcement material 9 mutually on the outer periphery of the lead terminal 4, The cover 10 is added to this. An element capable of ensuring sufficient strength while being thin can be realized.

  Next, as shown in FIG. 1, FIG. 2, FIG. 4 or the first reinforcing member 11, the second reinforcing member 9 is on the lead terminal 4 and outside the fixed connecting portion 7 and the contact electrode 8. Are formed at the positions. The second reinforcing material 9 realizes space securing and strength securing of the internal space formed by the cover 10.

  The second reinforcing member 9 is also used as an intermediary part for welding for interconnecting the first reinforcing member 11, the cover 10, and the substrate 2 in FIG. 2 and the cover 10, and a space in which the movable region of the movable electrode 6 is secured.

  In particular, when the cover 10 is formed of a resin film or the like, the second reinforcing material 9 as the intermediate layer is effective because the metal lead terminals 4 cannot be directly welded. There are also benefits.

  Here, similarly to the substrate 2, the cover 10, the first reinforcing material 11, and the second reinforcing material 9 are each, or at least partially, PET (polyethylene terephthalate) or PEN (polyethylene naphthalate), PPS (polyphenylene sulfite). Alternatively, it may be formed of a thermoplastic resin film or liquid crystal polymer mainly composed of PEEK (polyetheretherketone). When formed of these materials, there is an advantage that it is realized as a very thin and light weight.

  Polyimide is also preferably used. The same applies to any of the substrate 2, the first reinforcing material 11, the second reinforcing material 9, and the cover 10.

(Embodiment 3)
In Embodiment 3, the manufacturing process of the self-restoring protection element of the present invention will be described.

  7 to 15 are manufacturing process diagrams of the self-recovering protection element according to the third embodiment of the present invention. Each drawing number follows the order in the manufacturing process. In addition, this is an example of a manufacturing process, and of course, it may be manufactured in a process other than this.

  Reference numeral 20 denotes a through hole, 21 denotes a dome, 22 denotes a contact thin film surface, 23 denotes a film welding portion, 24 denotes an internal space, 25 denotes a welded material, and 26 denotes a cover member.

  As described in the first embodiment, the substrate film is a thermoplastic resin film mainly composed of PET (polyethylene terephthalate) or PEN (polyethylene naphthalate), PPS (polyphenylene sulfite) or PEEK (polyether ether ketone). Alternatively, it is formed of a liquid crystal polymer or the like. Or you may form with the metal plate to which the ceramic or the insulation process was given.

FIG. 8 shows the movable electrode 6, which is a bimetal piece or the like formed of a multilayer metal having different thermal expansion coefficients. The dome 21 is a portion curved in a dome shape, so that when the contact electrode 8 at the tip contacts the lead terminal 4, the dome 21 has a spring property and an elastic force, so that the pressure contact force can be improved. .

  FIG. 9 shows a state in which the lead terminals 4 are connected to the substrate 2. Further, although not shown, a first reinforcing material 11 may be formed between the lead terminal 4 and the substrate 2.

  A film weld 23 for connecting the second reinforcing member 9 is formed on the lead terminal 4, and a contact thin film surface 22 is formed at a portion where the tip of the movable electrode 6 contacts. The contact thin film surface 22 is realized by a metal film or plating having a low resistance and good durability and high impact resistance.

  FIG. 10 shows a state in which the movable electrode 6 is connected to the lead terminal 4 using the fixed connection portion 7. The base of the movable electrode 6 is fixedly connected by the lead terminal 4 and the fixed connection portion 7, and the tip (provided with the contact electrode 8 if necessary) is the contact thin film surface 22 on the other lead terminal 4 facing the movable electrode 6. Contact with. At this time, the contact pressure at the contact increases due to the elastic force of the dome 21.

  FIG. 11 shows the second reinforcing material 9, which is a film in which a portion that becomes the internal space 24 is cut out, and the shape and size of the film are configured in accordance with the element body. As the material, the same material as the substrate 2 such as PEN is used.

  FIG. 12 shows a state in which the second reinforcing material 9 is connected to the substrate 2 and the lead terminals 4. The opening of the second reinforcing member 9 is secured as an internal space 24 where the movable electrode 6, the fixed connection portion 7 connected thereto, and the contact thin film surface 22 exist. The second reinforcing material 9 is welded together with the film welded portion 23 and is also welded to the substrate 2. At this time, the through holes 20 can be combined so that they can be manufactured without misalignment.

  FIG. 13 shows a state in which the second reinforcing material 9 is welded. As a result of the welded material 25 being welded by ultrasonic welding or the like, the welded material 25 is in a protruding state, and since the welded material 25 has a sufficient amount, the internal space is sufficiently sealed. The For this reason, it is preferable to perform welding while sufficiently confirming an appropriate amount of the welded material 25 of the welded material 25. If the welding is insufficient, the sealing performance with the outside becomes insufficient, and there is a possibility that the contact electrode 8 or the movable electrode 6 may be corroded due to heat leakage or mixing of moisture or oxygen into the main body. In order to obtain a highly durable self-returning protective element 1, it is necessary to ensure sufficient welding.

  FIG. 14 shows a cover member 26 that forms the cover 10. The cover 10 has a raised shape, and is formed of PEN or the like as the substrate 2 or the like.

  It is preferable to improve the strength of the cover 10 by chamfering the corners or providing R. Further, the size of the cover 10 only needs to be large enough to cover the opening provided in the second reinforcing member 9 shown in FIG. Therefore, the cover 10 covers the movable electrode 6, the contact electrode 8, a part of the lead terminal 4, and the temperature maintaining component 3.

  FIG. 15 shows a state in which the cover member 26 is welded onto the second reinforcing member 9 and the cover 10 is placed on the element. In welding, ultrasonic welding or the like is used in the same manner as used for connection between the second reinforcing material 9 and the substrate 2. In the welding, a welded material 25 is generated, and thereby sufficient sealing is realized. Therefore, in order to prevent the movable electrode 6 and the like existing in the internal space 24 from being corroded and deteriorated, the welding by the welded material 25 is realized sufficiently. It is preferable to confirm whether it is done.

FIG. 16 shows a manufacturing process diagram of the self-returning protection element according to the third embodiment of the present invention.

  FIG. 17 shows a manufacturing process diagram of the self-restoring protection element according to the third embodiment of the present invention.

  Molding method, after putting the part to be molded of the self-recovering protection element that cut off the excess part into the mold mold prepared, after pouring the mold resin in the gap between the mold and the self-recovering protection element, A method of curing the resin under appropriate conditions (temperature, time), a method of applying a liquid resin with a brush and then curing under an appropriate curing condition, a powdered resin being cured after sprinkling, or heat resistance Resin material with high heat resistance strength is molded on the case by various methods that can be formed, such as sticking a resin seal with high flexibility and bending strength on the case.

  As a result, the heat resistance and strength of the self-restoring protection element can be increased. Alternatively, the mountability can be improved by ensuring the flatness of the bottom surface and the front surface.

  Since this is performed for the purpose of improving the strength and durability of the self-recovery protection element, it is fully conceivable that the object can be achieved even by molding only the cover portion.

  When the temperature maintaining component is mounted, the temperature maintaining component 3 is mounted on the base film as shown in FIG.

  Through the above steps, the self-recovery protection element 1 finally manufactured is very small and thin, can be easily manufactured, and can be excellent in strength and durability.

  The conventional configuration in which a movable electrode is stored in an insulating case or a resin case and lead wires such as copper wires are drawn out has a disadvantage in that the yield in the manufacturing process is poor and the size is further increased. However, according to the configuration and the manufacturing process of the second embodiment, a self-recovery protection element that is high in yield, thin, excellent in strength and durability, without misalignment between the substrate and the cover is realized. It is.

(Embodiment 4)
In the fourth embodiment, a state where the self-restoring protection element 1 is mounted on a battery pack used for a portable terminal or the like is shown.

  In addition, it may be used for a battery other than a battery pack, a power supply circuit, and a substrate circuit, and may be used not only for a portable terminal but also for various electronic devices such as a lighting device and a heat generating device.

  FIG. 21 is a perspective view of a battery pack according to Embodiment 4 of the present invention. The self-recovery protection element described in the first and second embodiments is attached to the battery pack.

  Reference numeral 31 denotes a battery pack, 32 denotes a battery, 33 denotes a main body, 34 and 38 denote wirings, 35 and 37 denote lead terminals, and 36 denotes a self-recovering protection element.

The self-recovering protection element is the self-recovering protection element described in the first and second embodiments, and is used as a protection element against heat generation. The self-restoring protection element 36 has a pair of lead terminals 35 and 37 bonded on the base and connected to the wirings 34 and 38 of the battery 32, respectively. The self-recovering protection element 36 is connected in a state where it is placed in the middle of the wiring derived from only the positive or negative electrode of the battery 32. The upper body is divided into 34 and 38. The wiring 34 or 38 is led out as it is and connected to other electronic components. Separately (not shown), a wiring from another positive or negative pole is led out from the battery 32 and connected to another electronic component to be fed.

  Here, when abnormal heat generation occurs in the battery pack 31, as described in the first embodiment, the movable electrode 6 and the lead terminal are not in contact with each other, and current conduction is interrupted. Further, the temperature of the temperature maintaining component 3 rises, and the movable electrode 6 maintains the non-contact state as it is due to the maintained temperature. Thus, the current interruption state is further maintained for a certain period. As a result, the power supply to the electronic component is temporarily stopped, and the circuit and equipment are protected from abnormal current and abnormal heat generation.

  At this time, the non-contact of the movable electrode 6 is maintained for a certain time by the action of the temperature maintaining component 3, and at least until the abnormal current disappears, the non-contact state is maintained. It is ensured that adverse effects on circuits and devices are sufficiently avoided by returning and restarting the current supply.

  Furthermore, when the abnormal current disappears and the temperature of the temperature maintaining component 3 decreases, the movable electrode 6 is brought into a contact state again, current conduction through the movable electrode 6 is resumed, and the circuit from the battery 32 to the circuit is resumed. Power supply is resumed.

  This makes it possible to safely return to the operating state without replacing the element, unlike a thermal fuse that cuts off the current by fusing.

  For this reason, even if command processing is being executed, such as a portable terminal or a notebook personal computer, it can be resumed, so that the user's processing up to that point is not wasted and stored data is not lost. So there is an advantage of being very user friendly.

  For this reason, it can be optimally used for a battery pack, a battery, a power supply circuit, and other circuits of an electronic device that protects the device from abnormal current and abnormal heat generation while reducing an extra burden on the user.

  In addition to battery packs, power supply circuits, power supply devices, power generation devices, heat generating devices, secondary battery cells, fuel cells and other peripheral components, devices, devices, notebook computers, mobile phones, The present invention is widely applied to various devices such as in-vehicle electronic devices such as portable terminals and car navigation systems, video decks and DVD devices.

  In addition, the self-recovery protective element according to the present invention has been realized to be thin and small, so that it can protect against temperature rise of electronic devices that are required to be small, thin and light, such as portable devices. As an element, it is effectively used.

(Embodiment 5)
In the fifth embodiment, in order to prevent contact chattering in the self-recovering protection element 1 used in the first embodiment, the lead terminal 4 or the like that joins the movable electrode 6 as shown in a side cross-section in FIG. 19 is used. A self-recovery protection element provided with the pressure-intensifying portion 39 is used, or a self-recovery protection element as shown in a plan view in FIG. 20 is used to reduce the size of the self-recovery protection element. Even if the surface of the cover 10 is molded using the return type protective element, the same effect as shown in the first and second embodiments can be obtained.

The present invention is provided between a substrate, a pair of lead terminals whose opposing surfaces are separated from each other, and the substrate and the pair of lead terminals, and is connected to one of the pair of lead terminals and separable from the other lead terminal. The element strength and durability of the movable electrode, the cover that covers at least a part of the pair of lead terminals, the movable electrode and the temperature maintaining component, and the cover and the substrate are molded with a molding material, while being thin and small. When there is abnormal heat generation due to abnormal current, etc., the current conduction is cut off, and after the abnormal condition is resolved, the conduction is resumed, preventing the influence on the electronic equipment properly and replacing parts is unnecessary. It can also be applied to necessary uses that can be done.

1 is a perspective view of a self-restoring protection element according to Embodiment 1 of the present invention. Side view of self-recovering protection element according to Embodiment 1 of the present invention 1 is a perspective view of the inside of a self-restoring protection element according to Embodiment 1 of the present invention. Side view of self-recovering protection element according to Embodiment 2 of the present invention The perspective view of PTC in Embodiment 2 of this invention Side sectional view of movable electrode in embodiments 1 and 2 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Manufacturing process diagram of self-recovering protection element according to Embodiment 3 of the present invention Side sectional view of a self-recovery protection element according to Embodiment 5 of the present invention Plan view of self-restoring protection element according to Embodiment 5 of the present invention The perspective view of the battery pack in Embodiment 4 of this invention. Side view of a conventional self-restoring protection element

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-restoration type protective element 2 Board | substrate 3 Temperature maintenance component 4 Lead terminal 5 Connection surface 6 Movable electrode 6b Separation contact 7 Fixed connection part 8 Contact electrode 9 Second reinforcement material 10 Cover 11 First reinforcement material 12 Inner layer 13 Electrode 14 Outer layer DESCRIPTION OF SYMBOLS 15 Inner layer 16 Intermediate | middle layer 17 Mold material 20 Through-hole 21 Dome 22 Contact thin film surface 23 Film welding part 24 Internal space 25 Welding material 26 Cover member 31 Pack battery 32 Battery 33 Main body 34, 38 Wiring 35, 37 Lead terminal 36 Self-reset type Protective element 39 Pressure welding part 40 Narrow part of lead terminal

Claims (17)

A substrate,
A pair of lead terminals provided on the substrate and having opposing surfaces separated from each other;
A movable electrode fixedly connected to one of the pair of lead terminals and separable from the other lead terminal;
A cover that covers at least a part of the pair of lead terminals and the movable electrode;
A self-restoring type protective element, wherein the exterior of the cover is molded. A substrate,
A temperature maintaining component provided on the substrate;
A pair of lead terminals provided on the temperature maintaining component, connected to the temperature maintaining component and spaced apart from each other;
A movable electrode fixedly connected to one of the pair of lead terminals and separable from the other lead terminal;
A cover that covers at least a part of the pair of lead terminals, the movable electrode, and the temperature maintaining component;
A self-recovering protection element comprising a molding material for molding the exterior of the cover. A substrate,
A pair of lead terminals whose opposing surfaces are spaced apart from each other;
A temperature maintaining component provided between the substrate and the pair of lead terminals and connected to each of the pair of lead terminals;
A movable electrode fixedly connected to one of the pair of lead terminals and separable from the other lead terminal;
A cover that covers at least a part of the pair of lead terminals, the movable electrode, and the temperature maintaining component;
A self-recovering protection element comprising a molding material for molding the exterior of the cover. A substrate,
A temperature maintaining component provided on the substrate;
A pair of lead terminals provided on the temperature maintaining component, connected to the temperature maintaining component and spaced apart from each other;
A movable electrode connected to one of the pair of lead terminals and separable from the other lead terminal;
At least one of a first intermediate reinforcing material provided between the pair of lead terminals and the substrate and around the temperature maintaining component, or a second intermediate reinforcing material provided on the pair of lead terminals;
A cover that covers at least a part of the pair of lead terminals, the movable electrode, and the temperature maintaining component;
A self-recovering protection element comprising a molding material for molding the cover exterior. The self-recovering protection element according to claim 1, wherein the molding material is a thermosetting resin such as an epoxy resin. The self-recovering protection element according to claim 1, wherein the molding material is a thermoplastic resin such as PPS (polyphenylene sulfite) or a liquid crystal polymer. The cover is formed by using a thermoplastic resin film such as PEN and using two or more layers such as a substrate and an upper cover substrate, or two layers such as a substrate, an intermediate film, and an upper cover. The self-recovering protection element according to claim 1, wherein 7. The substrate according to claim 1, wherein the substrate has at least a part of a pair of lead terminals, a length including a movable electrode, a width wider than these, and a molding material is formed thereon when molding. Or a self-recovering protective element according to claim 1. The self-recovering protection element according to claim 1, wherein the molding material covers the entire cover. The pressure welding reinforcement part which improves the contact force in the separation part of a movable electrode and a lead terminal was provided in at least one part of said pair of lead terminal or a movable electrode, The any one of Claims 1-9 characterized by the above-mentioned. The self-recovering protective element as described. 2. The pair of lead terminals have narrow portions that are narrower than other portions in a portion connected to the cover and a portion connected to the movable electrode. 10. The self-returning protective element according to any one of 10. The self-recovering protection element according to claim 1, wherein the molding material has a thickness on an upper surface of the cover rather than a bottom surface of the substrate. Installing the substrate; and
Bonding a pair of lead terminals having opposing surfaces spaced apart from each other on the substrate;
Bonding a part of the movable electrode to one of the lead terminals;
Forming a cover that covers a portion of the lead terminal, the movable electrode, and the temperature maintaining component;
A method of manufacturing a self-restoring protection element, comprising the step of molding the cover. Installing the substrate;
Bonding a temperature maintaining component on the substrate;
Bonding a pair of lead terminals having opposing surfaces spaced apart from each other on the temperature maintaining component;
Bonding a part of the movable electrode to one of the lead terminals;
Forming a cover that covers a portion of the lead terminal, the movable electrode, and the temperature maintaining component;
A method of manufacturing a self-restoring protection element, comprising the step of molding the cover. Installing the substrate;
Bonding a temperature maintaining component on the substrate;
Bonding a first reinforcement around the temperature maintaining component;
Bonding a pair of lead terminals having opposing surfaces spaced apart from each other on the temperature maintaining component;
Mutually welding the first reinforcing material and the second reinforcing material provided on the lead terminal;
Bonding a movable electrode to one of the lead terminals;
A step of forming a cover that is welded to the second reinforcing material and covers a part of the movable electrode, the temperature maintaining component, and the lead terminal;
A method of manufacturing a self-restoring protection element, comprising the step of molding the cover. A battery, a main body for storing the battery, a wiring led out from the main body and electrically connected to the battery, and a self-recovering protection element provided between the wirings and in contact with the main body A self-recovering protective element according to any one of claims 1 to 13 is used as the self-recovering protective element. A self-recovering protective element according to any one of claims 1 to 13;
A power circuit;
A processing circuit;
An electronic device including a control circuit.

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