TWI382440B - Thermal protection module - Google Patents

Description

Thermal protection module

The invention relates to a protection module, and in particular to a thermal protection module relating to temperature.

In order to prevent the transient voltage surge of the power supply system from damaging the electronic components, a surge absorbing component such as a metal oxide varistor (MOV) is usually added to the electronic circuit. When the voltage across the surge absorbing element is inserted above its rated voltage value, the absorption surge will change from high impedance to low impedance, allowing voltage surges to pass through to protect the back end load from voltage surge images.

When the surge absorbing element absorbs the glitch, its own temperature will increase accordingly, and the generated thermal energy may cause the spur absorbing element itself to ignite and damage the surrounding electronic components.

Therefore, it is a conventional practice to connect a thermal cutoff fuse between the surge absorbing element and the power supply system, and the thermal fuse is thermally fused to cause the electronic circuit and the power supply system to be in an open state. However, the temperature of the surge absorbing element itself is actually higher than the temperature sensed by the temperature fuse, and the service life of the surge absorbing element is limited. Therefore, it is still possible that the surge absorbing element first ignites and the temperature fuse is fused again. Alternatively, the ignition of the surge absorbing element coincides with the melting of the thermal fuse, and the surrounding electronic components are still damaged.

The embodiment of the invention provides a thermal protection module, which is applied between a load and a power supply end, and is connected to a surge absorber and a switch unit having a bipolar switching structure by using a heat shrinkable band, and uses the temperature of the surge absorber itself to make heat The shrink band produces a contraction function, thereby driving the switching of the switching unit, so that the load and the power terminal are switched from on to off, so that the load is not affected by the surge at the power supply end.

In order to achieve the above object, an embodiment of the present invention provides a thermal protection module disposed between a power supply end and a load. The thermal protection module includes a surge absorber, a switch unit and a heat shrink tape. The surge absorber is coupled to the load. The switch unit includes a casing, a first conductive pin, a second conductive pin, a third conductive pin, a fourth conductive pin, a moving member, a first conductive portion and a second conductive portion. The movable member is movably inserted into the housing, and the first, second, third, and fourth conductive pins are respectively inserted into the housing, and the first and second conductive pins are respectively coupled to the power end, The third and fourth conductive pins are respectively coupled to the surge absorber, and the first and second conductive portions are respectively disposed on the moving member, and the first conductive portion is configured to contact the first and third conductive pins according to the movement of the moving member Alternatively, the second conductive portion is for contacting or separating from the second and fourth conductive pins as the moving member moves. The heat shrinkable belt is connected to the surge absorber and the moving member, and the heat shrinkable belt is used to drive the moving member by the contraction of the thermal energy of the conductive surge absorber.

When the heat shrinkable tape is contracted to a degree sufficient to switch the first conductive portion from the first and third conductive pins from the contact, and the second conductive portion and the second and fourth conductive pins are switched from the contact to the separation, the power terminal The circuit is disconnected from the surge absorber so that the load is not affected by the surge at the power supply.

In addition, the embodiment of the present invention further provides a thermal protection module disposed between the power end and the load, and the thermal protection module includes a surge absorber, a switch unit, and a heat shrink sleeve. The surge absorber is coupled to the load. The switch unit includes a casing, a first conductive pin, a second conductive pin, a third conductive pin, a fourth conductive pin, a moving member, a first conductive portion and a second conductive portion. The movable member is movably inserted into the housing, and the first, second, third, and fourth conductive pins are respectively inserted into the housing, and the first and second conductive pins are respectively coupled to the power end, and the third And the fourth conductive pins are respectively coupled to the surge absorber, the first and second conductive portions are respectively disposed on the moving member, and the first conductive portion is configured to contact the first and third conductive pins according to the movement of the moving member or Separating, the second conductive portion is for contacting or separating from the second and fourth conductive pins as the moving member moves. The heat shrinkable sleeve is sleeved on the surge absorber and connected to the moving member, and the heat shrinkable sleeve is used to generate a contraction by the thermal energy of the conduction surge absorber to drive the moving member to move toward the surge absorber.

When the heat shrinkable sleeve is contracted to a degree sufficient to switch the first conductive portion from the first and third conductive pins from the contact, and the second conductive portion and the second and fourth conductive pins are switched from the contact to the separation, the power source The circuit is disconnected from the surge absorber so that the load is not affected by the surge at the power supply.

In addition, the embodiment of the present invention further provides a thermal protection module, which is substantially the same as the above embodiment, and the difference is that the heat shrinkable sleeve is sleeved around the surge absorber, the moving member and the outer periphery of the casing, and the heat shrinkable sleeve is used for borrowing The contraction of the thermal energy of the conduction surge absorber causes the moving member to move toward the surge absorber.

In summary, the thermal protection module provided by the embodiment of the present invention can utilize the heat shrinkable band to heat contract when the swell absorber is heated to the operating temperature range, and simultaneously drive the first conductor of the switching element. And the contact position of the second electrical conductor, so that the power supply end and the surge absorber can be safely and automatically powered off when a surge occurs.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

The present specification discloses a thermal protection module for use between a power supply end and a load. The protection module, in particular, utilizes the temperature of the surge absorber itself to cause a contraction of the heat shrinkable band, thereby driving a switch having a bipolar switching structure. The switching of the unit switches the load from the power supply to the open circuit, so that the load is not affected by the surge of the power supply.

[First Embodiment]

Please refer to FIG. 1A. FIG. 1A is a schematic diagram of a first embodiment of a thermal protection module of the present invention. As shown in FIG. 1A, the protection module 1 includes a switch unit 10, a surge absorber 12, and a heat shrink band 14, wherein the surge absorber 12 and the switch unit 10 are disposed on the circuit board 16 and coupled to each other. The shrink band 14 is connected to the switch unit 10 and the surge absorber 12.

The switch unit 10 includes a housing 101, a plurality of conductive pins 103, and a moving member 105. The outer side of the housing 101 is provided with a guide rail 1011 and an opening 1013. The moving member 105 has a protruding portion 1051. The surge absorber 12 includes a body 120 and a plurality of pins 121.

In the present embodiment, the heat shrink tape 14 connects the casing 101, the projections 1051, and the body 120 of the surge absorber 12. The moving member 105 is movably inserted into the casing 101, and the moving member 105 is selectively passed through the opening 1013, and the protruding portion 1051 protrudes or is buried in the casing 101 as the moving member 105 moves. The plurality of conductive pins 103 are inserted into the housing 101, that is, the plurality of conductive pins 103 extend from the inside of the housing 101 to the outside of the housing 101. The switch unit 10 is inserted into the circuit board 16 through a plurality of conductive pins 103 to be respectively coupled. Connected to the power supply terminal (not shown) and the surge absorber 12. The plurality of pins 121 are inserted into the body 120 of the surge absorber 12, and the surge absorber 12 is inserted into the circuit board 16 through a plurality of pins 121 to be coupled to the plurality of conductive pins 103 and the load respectively. Show).

Generally, the surge absorber 12 has at least two pins 121, and the power terminal includes two end points, that is, a live line and a neutral line end, or includes three end points, that is, a live line end, a center line end, and a ground. end. At least two of the plurality of conductive pins 103 of the switch unit 10 are respectively coupled to the live end and the neutral end of the power supply end, or the live end and the ground end, and at least two of the plurality of conductive pins 103 are coupled to Two pins 121 of the surge absorber 12.

The heat shrink band 14 is used to generate a contraction by the thermal energy of the body 120 of the swell absorber 12, which is sufficient to drive the moving member 105 to move in the casing 101, and causes the switch unit 10 to simultaneously switch two of the power terminals. The coupling relationship between the end (the live end and the neutral end, or the live end and the ground) and the surge absorber 12 is changed from the conductive to the open circuit, whereby the thermal protection module 1 in this embodiment can be protruded Before the temperature of the wave absorber 12 is too high or fails, the conduction between the power supply terminal and the surge absorber 12 is cut off, so that the load is not affected by the surge.

In actual implementation, the body 120 of the surge absorber 12 may be covered by an insulating material such as silicone resin, and the body 120 may be adhered to or adhered to the outer side surface of the casing 101 through an adhesive. The moving member 105 may be made of an insulating material that is heat-resistant and not easily deformed. The outer shape of the heat shrinkable tape 14 may be a strip shape or a ring shape. If the heat shrinkable tape 14 is a strip shape, the heat shrinkable tape 14 is respectively connected to the body 120 of the surge absorber 12 and the protruding portion of the moving member 105 through the adhesive. 1051. If it is an annular heat shrinkable tape 14, such as a heat shrinkable sleeve, the heat shrinkable sleeve is simultaneously sleeved around the outer periphery of the switch unit 10 and the surge absorber 12, and the heat shrinkable tape 14 is surrounded by the guide rail 1011. Around body 101.

In order to further explain how the switching unit 10 achieves the coupling relationship between the two end points of the switching power supply terminal and the surge absorber, please refer to FIG. 1B to FIG. 1C, and FIG. 1B and FIG. 1C are respectively the heat of the present invention. A cross-sectional view of a first embodiment of a protection module. As shown in FIG. 1B, the housing 101 includes a first side panel 1015, a second side panel 1016, a third side panel 1017, and a fourth side panel 1018. The plurality of conductive pins 103 include a first conductive pin 1031, a second conductive pin 1032, a third conductive pin 1033, and a fourth conductive pin 1034. The switch unit 10 further includes a first conductive portion 107 and a second conductive portion 108.

The first side plate 1015 and the second side plate 1016 are opposite to each other, and the moving member 105 is movably disposed between the first side plate 1015 and the second side plate 1016. The third side plate 1017 and the fourth side plate 1018 are opposed to each other and are respectively interlaced with the first side plate 1015 and the second side plate 1016. Further, the moving member 105 has a recess 1053, and the fourth side plate 1018 has a projection 1019, and the position of the recess 1053 on the moving member 105 corresponds to the position at which the bump 1019 is disposed on the fourth side plate 1018. The opening 1013 is provided on the third side plate 1017.

In this embodiment, the first conductive pin 1031 and the third conductive pin 1033 are respectively disposed on the inner side of the first side plate 1015, and the second conductive pin 1032 and the fourth conductive pin 1034 are respectively disposed on the inner side of the second side plate 1016. The first conductive portion 107 and the second conductive portion 108 are fixedly disposed on opposite sides of the moving member 105, and the first conductive portion 107 is disposed on the moving member 105 and disposed on the first conductive pin 1031 and the third conductive pin 1033. Corresponding to the position inside the casing 101, the position where the second conductive portion 108 is disposed on the moving member 105 corresponds to the position at which the second conductive pin 1032 and the fourth conductive pin 1034 are disposed inside the casing 101. The first conductive portion 107 and the second conductive portion 108 on the moving member 105 are matched with the positions of the plurality of conductive pins 103 to serve as a bipolar switching structure of the switching unit 10.

In one embodiment, the first conductive pin 1031 is coupled to the live end of the power terminal, and the second conductive pin 1032 is coupled to the neutral end or the ground end of the power terminal. The third conductive pin 1033 and the fourth conductive pin 1034 are respectively coupled to the surge absorber 12 .

When the heat shrinkable tape 14 is not shrunk or the degree of shrinkage is insufficient, as shown in FIG. 1B, that is, when the moving member 105 is in the initial state, the protruding portion 1051 protrudes from the casing 101 through the opening 1013, and the first conductive portion 107 simultaneously Contacting the first conductive pin 1031 and the third conductive pin 1033, and the second conductive portion 108 simultaneously contacts the second conductive pin 1032 and the fourth conductive pin 1034, whereby at least two ends of the power terminal are electrically connected to the surge absorber 12 .

In one embodiment, the first conductive portion 107 has two contact points, which are a first contact point 1071 and a second contact point 1073, respectively, and the second conductive portion 108 has two contact points, respectively a third contact point 1081 and The fourth contact point 1083. The first contact point 1071 and the second contact point 1073 contact the first conductive pin 1031 or the third conductive pin 1033, respectively, and the third contact point 1081 and the fourth contact point 1083 contact the second conductive pin 1032 or the fourth conductive pin 1034, respectively.

When the heat shrinkable tape 14 is contracted by the temperature of the surge absorber 12 itself, and the degree of shrinkage is sufficient to drive the moving member 105 to move into the casing 101, as shown in FIG. 1C, the first conductive portion 107 and the first portion A conductive pin 1031 and a third conductive pin 1033 are staggered by the movement of the moving member 105, and are separated from each other by contact, and the second conductive portion 108 is similar to the second conductive pin 1032 and the fourth conductive pin 1034 by the moving member 105. Move and stagger, change from mutual contact to separation. Thereby, both ends of the power supply terminal are disconnected from the surge absorber 12. If the power supply has a third end, the circuit can be broken due to the disconnection of the two ends.

It is worth mentioning that the heat shrinkable band 14 is not retractable after being contracted, so that the moving member 105 can only move in one direction, and after the moving member 105 is moved, the bump 1019 is received in the groove 1053 of the moving member 105. The shape of the groove 1053 and the bump 1019 is not limited to that shown in FIGS. 1B and 1C. The groove 1053 can be used to guide the moving direction of the moving member 105, and can also be used to lock the bump 1019 so that the moving member 105 can be fixedly disposed in the casing 101 after being moved.

[Second embodiment]

Please refer to FIG. 2A. FIG. 2A is a schematic diagram of a second embodiment of the thermal protection module of the present invention. As shown in FIG. 2A, the thermal protection module 2 of the second embodiment is substantially the same as the thermal protection module 1 of the first embodiment, that is, the protection module 2 includes the switch unit 20, the surge absorber 22, and the heat shrinkage. The strip 24, wherein the switch unit 20 is inserted into the circuit board 26 through a plurality of conductive pins 203, and the surge absorber 22 is inserted into the circuit board 26 through a plurality of pins 221.

The difference is that the protruding portion 2051 of the moving member 205 is adjacent to the body 220 of the surge absorber 22, and the heat shrinkable band 24 is connected to the body 220 and the protruding portion 2051. When the heat shrinkable band 24 is not shrinking or shrinking insufficiently, That is, when the moving member 205 is in the initial state, there is a space between the protruding portion 2051 and the body 220 of the surge absorber 22. When the contraction of the heat shrink tape 24 is sufficient to drive the moving member 205 to move, the moving member 205 is moved through the opening 2013 and toward the outside of the housing 201.

In an embodiment, the protrusion 2051 can have a guide rail 2052, and the heat shrinkable strap 24 can have a shape of a belt or a ring. In the case of the strip-shaped heat shrinkable tape 24, the heat shrinkable tape 24 is connected to the body 220 of the surge absorber 22 and the protruding portion 2051 of the moving member 205 through the adhesive. In the case of an annular heat shrinkable tape 24, such as a heat shrinkable sleeve, the heat shrinkable sleeve simultaneously encases the outer periphery of the surge absorber 22 and passes through the guide rail 2052 on the projection 2051.

2B to 2C, FIG. 2B and FIG. 2C are respectively cross-sectional views of a second embodiment of the thermal protection module of the present invention. As shown in FIG. 2B, the cross-sectional view of the protection module 2 is substantially the same as that of the protection module 1 of FIG. 1B, that is, the plurality of conductive pins 203 include a first conductive pin 2031, a second conductive pin 2032, and a third conductive pin. 2033 and the fourth conductive pin 2034, and the plurality of conductive pins 203 are disposed in pairs on the opposite first side plate 2015 and the second side plate 2016, and the moving member 205 is movably disposed on the first side plate 2015 and the second side plate Between 2016. The difference is that the moving member 205 has the bumps 2053 on both sides thereof, and the first side plate 2015 and the second side plate 2016 respectively have the recess 2019. The position of the bump 2053 on the moving member 205 and the groove 2019 are disposed on the first side plate. The location on 2015 and the second side panel 2016 are adjacent.

When the heat shrinkable tape 24 is not shrunk or the degree of shrinkage is insufficient, as shown in FIG. 2B, that is, when the moving member 205 is in the initial state, the protruding portion 2051 protrudes from the case 201 through the opening 2013, and the protruding portion 2051 and the protrusion The wave absorbers 22 are spaced apart by a distance. The first conductive portion 207 simultaneously contacts the first conductive pin 2031 and the third conductive pin 2033, and the second conductive portion 208 simultaneously contacts the second conductive pin 2032 and the fourth conductive pin 2034, thereby having at least two ends of the power terminal The surge absorber 22 is turned on.

When the heat shrinkable tape 24 is contracted by the temperature of the surge absorber 22 itself, and the degree of shrinkage is sufficient to drive the moving member 205 to move outside the casing 201, the projection 2051 is more closely abutted with the surge absorber 22, As shown in Figure 1C. The first conductive portion 207 is separated from the first conductive pin 2031 and the third conductive pin 2033, and the second conductive portion 208 is separated from the second conductive pin 2032 and the fourth conductive pin 2034, thereby absorbing the two ends of the power terminal and the surge. The device 22 is open. If the power supply has a third end, the circuit can be broken due to the disconnection of the two ends.

In addition, the heat shrinkable band 24 is not retractable after being contracted, so that the moving member 205 can only move in one direction, and after the moving member 205 is moved, the bump 2053 is received in the groove 2019. The shape of the groove 2019 and the bump 2053 is not limited to that shown in FIGS. 2B and 2C. The groove 2019 can be used to guide the moving direction of the moving member 205, and can also be used to lock the bump 2053 so that the moving member 205 can be fixedly disposed in the housing 201 after being moved.

The amount of deformation of the heat shrinkable tapes 14, 24 in the above two embodiments in relation to the heat shrinkage and the moving distance of the moving members 105, 205 are appropriately designed, and the operating temperature range of the heat shrinkable tapes 14, 24 is matched with the surge absorption. The critical temperature at which the devices 12, 22 fail.

Please refer to FIG. 2D. FIG. 2D is a characteristic diagram of an embodiment of a heat shrinkable tape in the thermal protection module of the present invention, wherein the x axis represents the temperature T (° C.) and the y axis represents the shrinkage S ( x %). The operating temperature range of the heat shrinkable tapes 14, 24 refers to a temperature range [ T ₁ , T ₂ ] corresponding to the shrinkage ratio S being greater than or equal to the preset shrinkage ratio x %, greater than or less than the operating temperature [ T ₁ , T _{When 2} ], the shrinkage ratio S is smaller than the preset shrinkage ratio x %.

The shrinkage ratio S may be a Transverse Shrinkage Rate of the heat shrinkable tapes 14, 24, and the shrinkage ratio S may be calculated as shown in the formula (1).

Wherein L ₀ represents the lateral length before shrinkage of the heat shrinkable tape 249, and L represents the lateral length of the heat shrinkable tape 14, 24 when it is contracted.

When the temperature of the heat shrinkable tapes 14, 24 is in the operating temperature range [ T ₁ , T ₂ ], the shrinkage ratio S reaches the preset shrinkage ratio x %, and the amount of deformation that can be generated by the heat shrinkable tapes 14, 24 ( L - L ₀ ) is sufficient to move the moving parts 105 , 205 to separate the first conductive portion 107 from the first conductive pin 1031 and the third conductive pin 1033 , and the second conductive portion 108 and the second conductive pin 1032 and the fourth conductive pin 1034 Separation. Or separating the first conductive portion 207 from the first conductive pin 2031 and the third conductive pin 2033, and the second conductive portion 208 is separated from the second conductive pin 2032 and the fourth conductive pin 2034, thereby thereby The end and the surge absorbers 12 and 22 are disconnected, and the thermal protection modules 1 and 2 can simultaneously disconnect the two ends of the power supply terminal from the surge absorber 12 or 22 before the surge absorbers 12 and 22 fail, thereby achieving safe use of electricity. Effect.

[Third embodiment]

Please refer to FIG. 3. FIG. 3 is an exploded perspective view of a third embodiment of the thermal protection module of the present invention. FIG. 3 shows only the switch unit 30 in the thermal protection module. In actual implementation, the switch unit 30 can be applied to the thermal protection module 1 of the first embodiment or the thermal protection module 2 of the second embodiment.

The switch unit 30 includes a housing 301, a plurality of conductive pins 303, a moving member 305, a first conductive portion 307, and a second conductive portion (not shown). The housing 301 includes a frame plate 301a and a cover plate 301b. The outer side of the frame plate 301a has a guide rail 3011. The cover plate 301b has an opening 3013. The inner side of the cover plate 301b has a plurality of limiting holes 3018. The moving member 305 has a bump 3053.

The plurality of conductive pins 303 may be disposed on opposite sides of the frame plate 301a in pairs, and the first conductive portion 307 and the second conductive portion are respectively disposed on two sides of the moving member 305, wherein the plurality of conductive pins 303 The position of the frame plate 301a corresponds to the position at which the first conductive portion 307 and the second conductive portion are disposed on the moving member 305. The position at which the bump 3053 is disposed on the moving member 305 corresponds to the position at which the limiting hole 3018 is disposed on the cap plate 301b.

In one embodiment, the first conductive portion 307 and the second conductive portion may be conductive elastic sheets having a plurality of protruding contact points (not labeled) for contacting the plurality of conductive pins 303, respectively. The connection relationship between the plurality of contact points and the plurality of conductive pins 303 can be referred to the first embodiment or the second embodiment.

The heat shrinkable tape (not shown) surrounds the casing 301 and the surge absorber (not shown) through the guide rail 3011 of the casing 301, and is connected to the moving member 305, and the heat shrinkable tape may also pass through the moving member 305. The guide rails (not shown) are connected to the surge absorber without having to surround the housing 301.

When the heat shrinkable tape is contracted by the temperature of the surge absorber itself, the moving member 305 can move through the opening 3013 in the housing 301, so that the first conductive portion 307 and the second conductive portion and the plurality of conductive pins 303 are The contact turns into separation. The shape and size of the limiting hole 3018 are matched with the shape and size of the bump 3053. The bump 3053 is accommodated in the different limiting hole 3018 as the moving member 305 moves, that is, the limiting hole 3018 can be used for positioning. The position of the moving member 305 before or after the movement in the housing 301.

In order to specifically describe the coupling relationship between the components of the thermal protection modules of the first embodiment, the second embodiment, and the third embodiment, please refer to FIG. 4A to FIG. 4B, and FIG. 4A and FIG. 4B are respectively the present invention. A circuit diagram of an embodiment of a thermal protection module. As shown in FIG. 4A, the thermal protection module 4a includes a switch unit 40a and a surge absorber 42. The switch unit 40a is coupled to the power terminal 45, and the surge absorber 42 is coupled to the switch unit 40a and the load 48, respectively.

In the present embodiment, the surge absorber 42 may comprise at least one surge absorbing element, for example comprising three surge absorbing elements, which may be connected to each other in series or in parallel. The switch unit 40a has a first switch 401a and a second switch 402b. The first switch 401a and the second switch 402a are respectively coupled to the live end L or the ground end G of the power terminal 45. When the surge passing through the live end L or the ground G exceeds the rated voltage of any of the surge absorbers in the surge absorber 42, the first switch 401a and the second switch 402b can simultaneously switch the surge absorber 42 and the power supply. The coupling relationship between the live end L of the terminal 45 or the ground G causes the surge absorber 42 to be disconnected from the power supply terminal 45, and the load 48 is not affected by the surge.

As shown in FIG. 4B, the thermal protection module 4b shown in FIG. 4B is substantially the same as the thermal protection module 4a of FIG. 4A, and the difference is that the first switch 401b and the second switch 402b of the switch unit 40 are respectively connected to the power terminal 45. The live end L or the neutral end N is coupled. When the surge passing through the live end L or the neutral end N exceeds the rated voltage of any of the surge absorbers in the surge absorber 42, the first switch 401b and the second switch 402b can simultaneously switch the surge absorber 42 and The coupling relationship between the live end L or the neutral end N of the power terminal 45 causes the surge absorber 42 to be disconnected from the power terminal 45, and the load 48 is not affected by the surge.

[Possible efficacy of the embodiment]

According to the embodiment of the invention, the thermal protection module uses the shrinkage characteristic of the heat shrinkable band to match the structure of the switch unit, so that the switch unit automatically breaks before the surge absorber fails or catches fire, and the switching state of the switch unit cannot be restored after the disconnection Not only can the peripheral circuit components be damaged when the surge absorber is caught, but the load can be protected from the surge more effectively.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

1, 2, 4a, 4b. . . Thermal protection module

10, 20, 30, 40a, 40b. . . Switch unit

401a, 401b. . . First switch

402a, 402b. . . Second switch

101, 201, 301. . . case

301a. . . Frame board

301b. . . Cover

1011, 3011. . . guide

1013, 2013, 3013. . . Opening

1015, 2015. . . First side panel

1016, 2016. . . Second side panel

1017. . . Third side panel

1018. . . Fourth side panel

1019. . . Bump

2019. . . Groove

3018. . . Limit hole

103, 203, 303. . . Conductive pin

1031, 2031. . . First conductive pin

1032, 2032. . . Second conductive pin

1033, 2033. . . Third conductive pin

1034, 2034. . . Fourth conductive pin

105, 205, 305. . . Moving parts

1051, 2051. . . Protruding

1053. . . Groove

2052. . . guide

2053. . . Bump

3053. . . Bump

107, 207, 307. . . First conductive part

1071, 2071. . . First contact point

1073, 2073. . . Second touch point

108, 208. . . Second conductive portion

1081, 2081. . . Third contact point

1083, 2083. . . Fourth point of contact

12, 22, 42. . . Surge absorber

120, 220. . . Ontology

121, 221. . . Pin

14, 24. . . Heat shrink tape

16, 26. . . Circuit board

45. . . Power terminal

L. . . Fire line power end

N. . . Mid-line power terminal

G. . . Ground end

48. . . load

1A is a schematic view of a first embodiment of a thermal protection module of the present invention.

1B is a cross-sectional view of a first embodiment of a thermal protection module of the present invention.

1C is a cross-sectional view of a first embodiment of a thermal protection module of the present invention.

2A is a schematic view of a second embodiment of the thermal protection module of the present invention.

2B is a cross-sectional view of a second embodiment of the thermal protection module of the present invention.

2C is a cross-sectional view of a second embodiment of the thermal protection module of the present invention.

2D is a characteristic diagram of an embodiment of a heat shrinkable tape in the thermal protection module of the present invention.

3 is an exploded perspective view of a third embodiment of the thermal protection module of the present invention.

4A is a circuit diagram of an embodiment of a thermal protection module of the present invention.

4B is a circuit diagram of an embodiment of a thermal protection module of the present invention.

1. . . Thermal protection module

10. . . Switch unit

101. . . case

1011. . . guide

1013. . . Opening

1015. . . First side panel

1016. . . Second side panel

1017. . . Third side panel

1018. . . Fourth side panel

1019. . . Bump

103. . . Conductive pin

1031. . . First conductive pin

1032. . . Second conductive pin

1033. . . Third conductive pin

1034. . . Fourth conductive pin

105. . . Moving parts

1051. . . Protruding

1053. . . Groove

107. . . First conductive part

1071. . . First contact point

1073. . . Second touch point

108. . . Second conductive portion

1081. . . Third contact point

1083. . . Fourth point of contact

12. . . Surge absorber

120. . . Ontology

14. . . Heat shrink tape

Claims (15)

A thermal protection module is disposed between the power supply end and the load, the thermal protection module includes: a surge absorber coupled to the load; a switch unit including a housing, a first conductive pin, and a a second conductive pin, a third conductive pin, a fourth conductive pin, a moving member, a first conductive portion and a second conductive portion, wherein the moving member is movably inserted on the housing, the first The first and second conductive pins are respectively coupled to the power supply end, and the third and fourth conductive pins are respectively coupled to the power supply end. The first and second conductive portions are respectively disposed on the moving member, and the first conductive portion is in contact with or separated from the first and third conductive pins according to the movement of the moving member, the second The conductive portion is in contact with or separated from the second and fourth conductive pins according to the movement of the moving member; and a heat shrink band is coupled to the surge absorber and the moving member, wherein the heat shrink band is used to conduct the The thermal energy of the surge absorber produces a contraction to drive the moving member to move When the heat shrinkable tape is shrunk to a sufficient extent, the first conductive portion and the first and third conductive pins are switched from contact to be separated, and the second conductive portion and the second and fourth conductive pins are switched from contact to When separated, the power terminal is disconnected from the surge absorber, so that the load is not affected by the surge of the power terminal. The thermal protection module of claim 1, wherein the first and second conductive portions are respectively conductive elastic sheets, and the conductive elastic sheets have two contact points, and the two contact points of the first conductive portion are respectively used The two contact points of the second conductive portion are respectively in contact with the second and fourth conductive pins, in contact with the first and third conductive pins. The thermal protection module of claim 1, wherein the housing has an opening, the moving member has a protrusion, the moving member movably passes through the opening, and the protrusion protrudes from the opening. The thermal protection module of claim 3, wherein the opening and the surge absorber are disposed on different sides of the housing, the heat shrink band surrounds the housing, the protrusion, and the protrusion The body of the wave absorber, the contraction of the heat shrinkable belt drives the moving member to move into the housing. The thermal protection module of claim 4, wherein the outer side of the housing has a guide rail, and the heat shrinkable strap movably passes through the guide rail. The thermal protection module of claim 3, wherein the protrusion is adjacent to the surge absorber, and the contraction of the heat shrinkable belt drives the moving member to move outside the housing. The thermal protection module of claim 6, wherein the protrusion has a guide rail that surrounds the surge absorber and is movably passed through the guide rail. The thermal protection module of claim 1, wherein the moving member has a recess, and the housing has a protrusion therein, wherein the heat shrinkable strap is contracted to a degree sufficient for the first conductive portion and the first portion When the first and third conductive pins are separated, and the second conductive portion is separated from the second and fourth conductive pins, the bump is fixedly received in the groove. The thermal protection module of claim 1, wherein the moving member has a bump, the housing has a first recessed hole and a second recessed hole, and the heat shrinkable strap is contracted to a sufficient extent. When the first conductive portion is separated from the first and third conductive pins, and the second conductive portion is separated from the second and fourth conductive pins, the bump moves from the first recess to the second In the recessed hole. The thermal protection module of claim 1, wherein the moving member has a protrusion, and the receiving portion of the housing has a recess when the heat shrinkable band is contracted to be sufficient for the first conductive When the portion is separated from the first and third conductive pins, and the second conductive portion is separated from the second and fourth conductive pins, the bump is fixedly received in the groove. The thermal protection module of claim 1, wherein the heat shrinkable tape is operated at a preset shrinkage rate, and the maximum temperature of the operating temperature range is The critical temperature at which the surge absorber fails. A thermal protection module is disposed between the power supply end and the load, the thermal protection module includes: a surge absorber coupled to the load; a switch unit including a housing, a first conductive pin, and a a second conductive pin, a third conductive pin, a fourth conductive pin, a moving member, a first conductive portion and a second conductive portion, wherein the moving member is movably inserted on the housing, the first The first and second conductive pins are respectively coupled to the power supply end, and the third and fourth conductive pins are respectively coupled to the power supply end. The first and second conductive portions are respectively disposed on the moving member, and the first conductive portion is in contact with or separated from the first and third conductive pins according to the movement of the moving member, the second The conductive portion is in contact with or separated from the second and fourth conductive pins according to the movement of the moving member; and a heat shrink sleeve is sleeved on the surge absorber, the moving member and the housing, the heat shrink sleeve The tube is used to cause contraction by conducting thermal energy of the surge absorber to Moving the member toward the surge absorber; when the heat shrinkable sleeve is contracted to a degree sufficient to switch the first conductive portion from the first and third conductive pins from contact, and to cause the second conductive portion to When the second and fourth conductive pins are switched from contact to separate, the power terminal is disconnected from the surge absorber, so that the load is not affected by the surge of the power terminal. The thermal protection module of claim 12, wherein the heat shrinkable sleeve operates at a preset shrinkage rate, the operating temperature range is the highest when the temperature of the heat shrinkable sleeve is between an operating temperature range The temperature is the critical temperature at which the surge absorber fails. A thermal protection module is disposed between the power supply end and the load, the thermal protection module includes: a surge absorber coupled to the load; a switch unit including a housing, a first conductive pin, and a a second conductive pin, a third conductive pin, a fourth conductive pin, a moving member, a first conductive portion and a second conductive portion, wherein the moving member is movably inserted on the housing, the first The first and second conductive pins are respectively coupled to the power supply end, and the third and fourth conductive pins are respectively coupled to the power supply end. The first and second conductive portions are respectively disposed on the moving member, and the first conductive portion is in contact with or separated from the first and third conductive pins according to the movement of the moving member, the second The conductive portion is in contact with or separated from the second and fourth conductive pins according to the movement of the moving member; and a heat shrinkable sleeve is sleeved on the surge absorber and connected to the moving member, and the heat shrinkable sleeve is used To cause contraction by conducting heat of the surge absorber to Moving the member toward the surge absorber; when the heat shrinkable sleeve is contracted to a degree sufficient to switch the first conductive portion from the first and third conductive pins from contact, and to cause the second conductive portion to When the second and fourth conductive pins are switched from contact to separate, the power terminal is disconnected from the surge absorber, so that the load is not affected by the surge of the power terminal. The thermal protection module of claim 14, wherein the heat shrinkable sleeve is operated at a preset shrinkage rate, the operating temperature range being the highest when the temperature of the heat shrinkable sleeve is between an operating temperature range The temperature is the critical temperature at which the surge absorber fails.