WO2015025884A1 - スイッチ回路、及びこれを用いたスイッチ制御方法 - Google Patents
スイッチ回路、及びこれを用いたスイッチ制御方法 Download PDFInfo
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- WO2015025884A1 WO2015025884A1 PCT/JP2014/071769 JP2014071769W WO2015025884A1 WO 2015025884 A1 WO2015025884 A1 WO 2015025884A1 JP 2014071769 W JP2014071769 W JP 2014071769W WO 2015025884 A1 WO2015025884 A1 WO 2015025884A1
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- heating element
- open
- short
- circuit
- electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/0039—Means for influencing the rupture process of the fusible element
- H01H85/0047—Heating means
Definitions
- the present invention provides a switch circuit that includes a short-circuit portion that short-circuits between open electrodes and an open portion that opens between energized electrodes, and switches the entire circuit to an energized state or a cut-off state, and switch control using the same Regarding the method.
- serial ID attached to the device and software package For activation of various devices and software, send the serial ID attached to the device and software package to the manufacturer together with data with unique values for each computer such as computer hardware information and IP address, Next, it is performed by inputting from the software a “protection release key” that can be used only with the combination of the transmitted serial ID and computer sent from the manufacturer.
- Activating makes it possible to use various devices and software, or enables limited functions. Also, depending on the license conditions, for example, after a certain period of time has elapsed or after a predetermined number of uses, the functions of various devices and software are limited.
- an object of the present invention is to provide a switch circuit that can perform irreversible switching control and can effectively counter unauthorized use, and a switch control method using the switch circuit.
- a switch circuit includes a first fusible conductor and a first heating element that melts the first fusible conductor, and the first heating element.
- the first fusible conductor is melted by causing the first fusible conductor to melt, a short-circuit portion that short-circuits between the open electrodes by the molten conductor, a second fusible conductor disposed between the energizing electrodes, and the second A second heating element that melts the fusible conductor, and heats the second heating element to melt the second fusible conductor and opens between the energization electrodes;
- a first current control element that controls power feeding to one heating element, and a second current control element that controls power feeding to the second heating element, the open electrode of the short-circuit portion, and the The current-carrying electrode in the open part is connected in series.
- the switch circuit according to the present invention includes a first fusible conductor and a first heating element that melts the first fusible conductor, and the first heating element generates heat to generate heat.
- the first soluble conductor is melted, the short-circuit portion between the open electrodes is short-circuited by the molten conductor, the second soluble conductor disposed between the energized electrodes, and the second soluble conductor is melted.
- An open portion that melts the second soluble conductor by causing the second heat generating element to generate heat and opens the gap between the energizing electrodes, and power supply to the first heat generating element.
- a first current control element that controls power supply and a second current control element that controls power feeding to the second heating element, and the open electrode of the short-circuit part and the conductive electrode of the open part, Are connected in parallel.
- the switch control method includes a first fusible conductor and a first heating element that melts the first fusible conductor, and the first heating element generates heat by causing the first heating element to generate heat.
- the first soluble conductor is melted, the short-circuit portion that short-circuits between the open electrodes by the molten conductor, the second soluble conductor disposed between the energized electrodes, and the second soluble conductor is melted.
- a second heating element, the second heating element is heated to melt the second soluble conductor, and the current-carrying electrode is opened, and an opening to the first heating element is provided.
- a first current control element that controls power feeding; and a second current control element that controls power feeding to the second heating element, the open electrode of the short-circuit part and the conductive electrode of the open part. are connected in series, and the first current control element connects between the open electrodes of the short-circuit portion. Be contacted, switch the entire circuit from the cutoff state to the conduction state, the second current control element is opened between the powered electrode of the opening, it switches the entire circuit to re-cutoff state from the conduction state.
- the switch control method includes a first fusible conductor and a first heating element that melts the first fusible conductor, and the first heating element generates heat by causing the first heating element to generate heat.
- the first soluble conductor is melted, the short-circuit portion that short-circuits between the open electrodes by the molten conductor, the second soluble conductor disposed between the energized electrodes, and the second soluble conductor is melted.
- a second heating element, the second heating element is heated to melt the second soluble conductor, and the current-carrying electrode is opened, and an opening to the first heating element is provided.
- a first current control element that controls power feeding; and a second current control element that controls power feeding to the second heating element, the open electrode of the short-circuit part and the conductive electrode of the open part. are connected in parallel, and the second current control element connects between the energizing electrodes of the open portion. Released so, switching the entire circuit from the energized state to the cutoff state, said to short-circuit the above open electrodes of the short-circuit portion by the first current control element, in which switching to re-energized the entire circuit from the cutoff state.
- the circuit function can be controlled on and off physically and irreversibly. Therefore, unlike the case where the on / off of the function is controlled by software, the vulnerability to unauthorized use due to unauthorized copying, hacking, cracking, etc. can be improved.
- FIG. 1 is a block diagram showing a configuration of a first switch circuit to which the present invention is applied.
- FIG. 2 is a circuit diagram showing a configuration of the first switch circuit.
- FIG. 3 is a circuit diagram illustrating the first switch circuit that is energized by the short-circuit portion.
- FIG. 4 is a circuit diagram showing the first switch circuit that is cut off by the open portion.
- FIG. 5 is a circuit diagram showing another configuration of the first switch circuit.
- FIG. 6 is a block diagram showing a configuration of a second switch circuit to which the present invention is applied.
- FIG. 7 is a circuit diagram showing a configuration of the second switch circuit.
- FIG. 8 is a circuit diagram showing the second switch circuit that is cut off by the open portion.
- FIG. 1 is a block diagram showing a configuration of a first switch circuit to which the present invention is applied.
- FIG. 2 is a circuit diagram showing a configuration of the first switch circuit.
- FIG. 3 is a circuit diagram illustrating the first switch circuit
- FIG. 9 is a circuit diagram illustrating the second switch circuit that is energized by the short-circuit portion.
- FIG. 10 is a circuit diagram showing another configuration of the first switch circuit.
- FIG. 11 is a diagram illustrating a configuration example of a short-circuit element, in which (A) is a plan view and (B) is a cross-sectional view.
- 12A and 12B are diagrams showing a short-circuit element in which a soluble conductor is melted and short-circuited.
- FIG. 12A is a plan view and FIG. 12B is a cross-sectional view.
- FIG. 13 is a diagram illustrating a configuration example of an open element, in which (A) is a plan view and (B) is a cross-sectional view.
- 14A and 14B are diagrams showing an open element in which a soluble conductor is melted and short-circuited.
- FIG. 14A is a plan view and FIG. 14B is a cross-sectional view.
- the first switch circuit 1 to which the present invention is applied switches the function of the device from the off state to the on state, and again switches it to the off state.
- the second switch circuit 2 to which the present invention is applied switches the function of the device from the on-state to the off-state, and switches it back on.
- Each of the first and second switch circuits 1 and 2 includes a short-circuit portion that short-circuits between the open electrodes and an open portion that opens between the energized electrodes, and includes a short-circuit portion and an open portion according to the application to be applied. They are connected in series or in parallel.
- release part of the 1st, 2nd switch circuits 1 and 2 physically short-circuit between open electrodes by opening a soluble conductor, or open between energized electrodes. Therefore, the first and second switch circuits 1 and 2 can irreversibly switch the function of the application. Details will be described below.
- the first switch circuit 1 includes a short-circuit portion 10 that short-circuits the first and second open electrodes 11 and 12 and an open-circuit that opens the first and second energizing electrodes 21 and 22.
- the short circuit part 10 and the open part 20 are connected in series.
- the open section 20 is connected to the power supply 3 of the device whose function is controlled on and off by the first switch circuit 1
- the short circuit section 10 is connected to the functional circuit 4 of the device.
- the first switch circuit 1 receives the short circuit signal, and opens the first current control element 13 that controls the current so that the short circuit portion 10 is short-circuited between the first and second open electrodes 11 and 12. It has a second current control element 23 that receives the signal and controls the open portion 20 so that the first and second current-carrying electrodes 21 and 22 are opened.
- the first switch circuit 1 is configured by connecting a short-circuit element 10 ⁇ / b> A constituting the short-circuit portion 10 and an open element 20 ⁇ / b> A constituting the open-circuit portion 20 in series. Can do.
- the short-circuit element 10 ⁇ / b> A includes first and second open electrodes 11 and 12 opened in an initial stage, a first soluble conductor 14, and a first heating element 15 that melts the first soluble conductor 14. With.
- the short-circuit element 10A melts the first fusible conductor 14 by causing the first heating element 15 to generate heat, and a switch 16 that short-circuits the first and second open electrodes 11 and 12 with the molten conductor. Constitute.
- the first open electrode 11 is connected to the second energizing electrode 22 of the open element 20A
- the second open electrode 12 is connected to the functional circuit 4 of the device.
- the first soluble conductor 14 has one end connected to the first open electrode 11 and the other end connected to the first heating element 15.
- the first heating element 15 is connected to the first current control element 13 via the heating element electrode 17.
- the first current control element 13 controls power feeding to the first heating element 15 and is constituted by, for example, a field effect transistor (hereinafter referred to as FET), and according to a signal from a detection circuit (not shown). Works.
- FET field effect transistor
- the first fusible conductor 14 and the first heating element 15 are connected in series, and when the first current control element 13 is activated, the first heating element is connected from the power source 3 via the first fusible conductor 14. 15 is fed.
- the first heating element 15 generates heat
- the first soluble conductor 14 is melted, and the first and second open electrodes 11 and 12 are short-circuited by the molten conductor.
- the switch 16 is turned on, the power of the power supply 3 is supplied to the functional circuit 4, and the function of the device is turned on.
- the open element 20 ⁇ / b> A includes a second fusible conductor 24 disposed between the energizing electrodes 21 and 22, and a second heating element 25 that melts the second fusible conductor 24. By causing 25 to generate heat, the second soluble conductor 24 is melted, and the first and second current-carrying electrodes 21 and 22 are opened.
- the first energization electrode 21 is connected to the power source 3 of the device, and the second energization electrode 22 is connected to the first open electrode 11 of the short-circuit element 10A.
- the second soluble conductor 24 is disposed between the first energizing electrode 21 and the second energizing electrode 22.
- the open element 20A is energized between the first and second energization electrodes 21 and 22.
- One end of the second heating element 25 is connected to the power source 3 via the second soluble conductor 24, and the other end is connected to the second current control element 23 via the heating element electrode 26.
- the second current control element 23 controls power feeding to the second heating element 25, is constituted by, for example, an FET, and operates according to a signal from a detection circuit (not shown).
- the second second current control element 23 When the second second current control element 23 is activated, power is supplied from the power source 3 to the second heating element 25 via the second soluble conductor 24.
- the second heating element 15 When the second heating element 15 generates heat, the second fusible conductor 24 is melted, and the first and second current-carrying electrodes 21 and 22 are opened. As a result, the power supply path from the power supply 3 to the functional circuit 4 is interrupted, and the function of the device is turned off.
- the first switch circuit 1 initially opens between the first and second open electrodes 11 and 12 of the short-circuit portion 10, and the first and second energizations of the open portion 20.
- the electrodes 21 and 22 are short-circuited via the second soluble conductor 24.
- power supply to the first and second heating elements 15 and 25 is stopped by the first and second current control elements 13 and 23.
- the power supply path from the power source 3 to the functional circuit 4 is cut off, and a part or all of the device functions are disabled.
- the power supply path to the functional circuit 4 is connected, and the function of the device can be used.
- route to the 1st heat generating body 15 is interrupted
- the second current control is required.
- An open signal is supplied to the element 23 from the detection circuit, and the second current control element 23 is activated.
- the power of the power source 3 is supplied to the second heating element 25, and the second heating element 25 starts to generate heat.
- the second fusible conductor 24 is blown by transferring heat of the second heating element 15.
- the first and second current-carrying electrodes 21 and 22 that are short-circuited by the second soluble conductor 24 are cut off, and the power supply path from the power supply 3 to the functional circuit 4 is cut off.
- the function of the device becomes unusable.
- the first and second fusible conductors 14 and 24 are sequentially melted to connect and cut off the current path between the power supply 3 and the functional circuit 4.
- the function can be switched from the off state to the on state, and again to the off state.
- the first and second fusible conductors 14 and 24 are melted to connect and cut off the current path between the power supply 3 and the functional circuit 4.
- Function on / off can be controlled physically and irreversibly. Therefore, unlike the case where the on / off of the function is controlled by software, the vulnerability to unauthorized use due to unauthorized copying, hacking, cracking, etc. can be improved.
- the second switch circuit 2 includes a short-circuit portion 10 and an open portion 20, and the short-circuit portion 10 and the open portion 20 are connected in parallel between the power supply 3 and the functional circuit 4. ing.
- the second switch circuit 2 receives the short circuit signal, and opens the first current control element 13 that controls the current so that the short circuit portion 10 is short-circuited between the first and second open electrodes 11 and 12. It has a second current control element 23 that receives the signal and controls the open portion 20 so that the first and second current-carrying electrodes 21 and 22 are opened.
- the second switch circuit 2 is configured by connecting a short-circuit element 10 ⁇ / b> A constituting the short-circuit portion 10 and an open element 20 ⁇ / b> A constituting the open-circuit portion 20 in parallel. Can do.
- the short-circuit element 10 ⁇ / b> A has a first open electrode 11 connected to the power source 3 and a second open electrode 12 connected to the functional circuit 4 of the device.
- the other configuration of the short-circuit element 10A is as described above.
- the open element 20 ⁇ / b> A has a first current-carrying electrode 21 connected to the power source 3 of the device and a second current-carrying electrode 22 connected to the functional circuit 4 of the device.
- the other configuration of the opening element 20A is as described above.
- the second switch circuit 2 initially opens between the first and second open electrodes 11, 12 of the short-circuit portion 10, and the first and second energizations of the open portion 20.
- the electrodes 21 and 22 are short-circuited via the second soluble conductor 24.
- power supply to the first and second heating elements 15 and 25 is stopped by the first and second current control elements 13 and 23.
- the second switch circuit 2 secures a power supply path from the power supply 3 to the functional circuit 4 via the open portion 20, and the function of the device can be used.
- the second current control element 23 An open signal is supplied from the detection circuit to the second current control element 23. Then, the power of the power source 3 is supplied to the second heating element 25, and the second heating element 25 starts to generate heat. The second fusible conductor 24 is blown by transferring heat of the second heating element 15.
- the first and second current-carrying electrodes 21 and 22 that are short-circuited by the second soluble conductor 24 are cut off, and the power supply path from the power supply 3 to the functional circuit 4 is cut off.
- the function of the device becomes unusable.
- a short circuit signal is supplied from the detection circuit to the first current control element 13, and the first current control element 13 is activated. Then, the power of the power source 3 is supplied to the first heating element 15 and the first heating element 15 starts to generate heat. The first fusible conductor 14 is blown by transferring heat of the first heating element 15.
- the first and second open electrodes 11, 12 where the molten conductor of the first fusible conductor 14 is open is short-circuited, and power is supplied from the power supply 3 to the functional circuit 4.
- the path is connected and the device functions can be used.
- route to the 1st heat generating body 15 is interrupted
- the current path between the power source 3 and the functional circuit 4 is interrupted and reconnected by sequentially melting the first and second fusible conductors 14 and 24.
- the function can be switched from the on state to the off state and then back to the on state.
- the current path between the power source 3 and the functional circuit 4 is interrupted and reconnected by melting the first and second fusible conductors 14, 24.
- the function can be controlled on and off physically and irreversibly. Therefore, unlike the case where the on / off of the function is controlled by software, the vulnerability to unauthorized use due to unauthorized copying, hacking, cracking, etc. can be improved.
- the second switch circuit 2 there is one second soluble conductor 24 of the open element 20A in terms of circuit configuration, but as shown in FIG. 10, the second soluble conductors 24a and 24b are provided. You may have two.
- FIG. 11A shows a plan view of the short-circuit element 10A
- FIG. 11B shows a cross-sectional view of the short-circuit element 10A.
- the short-circuit element 10A includes an insulating substrate 30, a first heating element 15 provided on the insulating substrate 30, and a first open electrode 11 and a second open electrode 12 provided adjacent to each other on the insulating substrate 30.
- a third electrode 31 provided adjacent to the first open electrode 11 and electrically connected to the first heating element 15; and a second electrode provided adjacent to the second open electrode 12.
- first open electrode 11 and the third electrode 31 are provided between the first open electrode 11 and the third electrode 31 to form a current path, and by heating from the first heating element 15, the first open electrode A first fusible conductor a that shorts the current path between the first and second open electrodes 11 and 12, and the second open electrode 12 and the fourth Between the first heating element 15 and the first heating element 15. Melted, and a first, a first fusible conductor 14b for short-circuiting between the second opening electrodes 11 and 12. And the cover member 33 which protects the inside of the short circuit element 10A on the insulating substrate 30 is attached.
- the insulating substrate 30 is formed in a substantially square shape using an insulating member such as alumina, glass ceramics, mullite, zirconia, and the like.
- the insulating substrate 30 may be made of a material used for a printed wiring board such as a glass epoxy board or a phenol board, but it is necessary to pay attention to the temperature at which the first fusible conductors 14a and 14b are blown. is there.
- the first heating element 15 is a conductive member that has a relatively high resistance value and generates heat when energized, and is made of, for example, W, Mo, Ru, or the like.
- the first heating element 15 is obtained by forming a paste on the insulating substrate 30 using a screen printing technique by mixing a powdery body of these alloys, compositions, or compounds with a resin binder or the like. Or by firing.
- the first heating element 15 is covered with an insulating layer 35 on the insulating substrate 30.
- the insulating layer 35 efficiently transfers the heat of the first heating element 15 to the first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32, and the first soluble conductor 14 a,
- the molten conductor 14b is provided on the first and second open electrodes 11 and 12 for aggregation, and is made of, for example, a glass layer.
- the first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32 are formed on the insulating layer 35 covering the first heating element 15.
- the first open electrode 11 is formed adjacent to the second open electrode 12 on one side and insulated.
- a third electrode 31 is formed on the other side of the first open electrode 11.
- the first open electrode 11 and the third electrode 31 are electrically connected by mounting the first fusible conductor 14a, constitute a part of the power supply path from the power source 3 to the functional circuit 4, and the first A current path at the time of fusing one soluble conductor 14a, 14b is formed.
- the first open electrode 11 is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 30 through a conductive through hole 36 facing the side surface of the insulating substrate 30. Via the second energizing electrode 22 (FIG. 2) of the open element 20A or the power source 3 (FIG. 7).
- the third electrode 31 is connected to the first heating element 15 via a heating element extraction electrode 37 provided on the insulating substrate 30.
- the first heating element 15 is connected to the heating element electrode 17 facing the side edge of the insulating substrate 30 via the heating element extraction electrode 37.
- the heating element electrode 17 is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 30 through the conductive through hole 36, and the first current control element 13 is connected to the external heating terminal via the external connection terminal. Connected.
- a fourth electrode 32 is formed on the other side of the second open electrode 12 opposite to the one side adjacent to the first open electrode 11.
- the first soluble conductor 14 is connected to the second open electrode 12 and the fourth electrode 32.
- the second open electrode 12 is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 30 through a conductive through hole 36 facing the side surface of the insulating substrate 30. And connected to the functional circuit 4 (FIGS. 2 and 7).
- the first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32 can be formed using a general electrode material such as Cu or Ag, but at least the first, A coating such as Ni / Au plating, Ni / Pd plating, or Ni / Pd / Au plating is preferably formed on the surfaces of the second open electrodes 11 and 12 by a known plating process. Thereby, oxidation of the 1st, 2nd open electrodes 11 and 12 can be prevented, and a molten conductor can be held reliably.
- the solder that connects the first fusible conductor 14 or the low melting point metal that forms the outer layer of the first fusible conductor 14 is melted so that the first and second fusible elements 14A are melted. It is possible to prevent the open electrodes 11 and 12 from being cut by being eroded (soldered).
- the first fusible conductors 14a and 14b can use any metal that is quickly melted by the heat generated by the first heating element 15.
- a low-melting-point metal such as Pb-free solder mainly containing Sn. Can be suitably used.
- the first soluble conductors 14a and 14b may contain a low melting point metal and a high melting point metal.
- the low melting point metal it is preferable to use solder such as Pb-free solder, and as the high melting point metal, it is preferable to use Ag, Cu or an alloy containing these as a main component.
- the high melting point metal it is preferable to use Ag, Cu or an alloy containing these as a main component.
- the first soluble conductors 14a and 14b can be configured with a low melting point metal layer as an inner layer and a high melting point metal layer as an outer layer. Such first soluble conductors 14a and 14b can be formed by forming a high melting point metal layer on a low melting point metal foil using a plating technique, or other well-known lamination techniques, It can also be formed using a film formation technique. The first soluble conductors 14a and 14b may be configured such that the high melting point metal layer is an inner layer and the low melting point metal layer is an outer layer, and the low melting point metal layer and the high melting point metal layer are alternately laminated. Alternatively, a multilayer structure of four or more layers may be used.
- the first fusible conductors 14a and 14b are connected to the first and second open electrodes 11 and 12 and the third and fourth electrodes 31 and 32 using solder or the like.
- the first soluble conductors 14a and 14b are placed on the first soluble conductors 14a and 14b. A flux 39 is applied.
- the inside of the short-circuit element 10 ⁇ / b> A is protected by covering the insulating substrate 30 with the cover member 33.
- the cover member 33 has a side wall 33a that constitutes a side surface of the short-circuit element 10A and a top surface portion 33b that constitutes an upper surface of the short-circuit element 10A, and the side wall 33a is connected to the insulating substrate 30 so that the short-circuit element 10A. It becomes a lid that closes the inside of the.
- the cover member 33 is formed using an insulating member such as a thermoplastic plastic, ceramics, glass epoxy substrate, etc., similarly to the insulating substrate 30.
- the cover member 33 may be formed with a cover portion electrode 33c on the inner surface side of the top surface portion 33b.
- the cover part electrode 33 c is formed at a position overlapping the first and second open electrodes 11 and 12.
- the cover electrode 33c has a molten conductor aggregated on the first and second open electrodes 11 and 12. By being wetted by contact, the molten conductor can be reliably held between the first and second open electrodes 11 and 12, and the allowable amount to be held can be increased.
- the short-circuit element 10A When the device is activated, the short-circuit element 10A operates in response to the short-circuit signal from the first current control element 13, whereby the first short-circuit element 10A is connected to the power supply 3 from the first open electrode 11 side. Electric power is supplied to the heating element electrode 17 through the soluble conductor 14 a, the heating element extraction electrode 37, and the first heating element 15. Therefore, the first heating element 15 generates heat when energized. When the first soluble conductors 14a and 14b are melted by this heat, the molten conductors agglomerate on the first and second open electrodes 11 and 12, as shown in FIGS.
- the agglomerated molten conductors are combined on the first and second open electrodes 11 and 12, whereby the first and second open electrodes 11 and 12 are combined.
- the open electrodes 11 and 12 are short-circuited. That is, the shorting element 10A is short-circuited between both terminals of the switch 16 (FIGS. 3 and 9).
- the energization to the first heating element 15 is stopped because the first open electrode 11 and the third electrode 31 are cut off by the fusing of the first soluble conductor 14a.
- the open element 20A is formed at both ends of the insulating substrate 50, the second heating element 25 laminated on the insulating substrate 50 and covered with the insulating member 51, and the insulating substrate 50, as shown in FIG.
- the first energizing electrode 21 and the second energizing electrode 22, the heating element extraction electrode 52 laminated on the insulating member 51 so as to overlap the second heating element 25, and both ends of the first and second energizing electrodes A second soluble conductor 24 connected to each of the energizing electrodes 21 and 22 and having a central portion connected to the heating element extraction electrode 52;
- the insulating substrate 50, the second heating element 25, and the second soluble conductor 24 are the same as the insulating substrate 30, the first heating element 15, and the first soluble conductor 14 used in the short-circuit element 10A. Therefore, details are omitted.
- an insulating member 51 is disposed so as to cover the heating element 14, and a heating element extraction electrode 52 is disposed so as to face the second heating element 25 through the insulating member 15.
- an insulating member 51 may be laminated between the second heating element 25 and the insulating substrate 50.
- the insulating member 51 for example, glass can be used.
- One end of the heating element extraction electrode 52 is connected to the first heating element electrode 26a, and is continuous with one end of the second heating element 25 through the first heating element electrode 26A.
- the other end of the second heating element 25 is connected to the second heating element electrode 26b.
- the second heating element electrode 26 b is connected to an external connection terminal (not shown) formed on the back surface of the insulating substrate 50 through a conductive through hole 55 formed in the insulating substrate 50.
- the second heating element 25 is connected to the second current control element 23 via the second heating element electrode 26b and the external connection terminal.
- the second soluble conductor 24 is connected to the heating element extraction electrode 52 and the first and second energizing electrodes 21 and 22 by soldering or the like.
- the second fusible conductor 24 can be easily connected by reflow soldering.
- the first energizing electrode 21 and the second energizing electrode 22 formed on both side edges of the insulating substrate 50 and connected by the second fusible conductor 24 have through holes 55 respectively. And an external connection terminal (not shown) provided on the back surface of the insulating substrate 50.
- the 1st electricity supply electrode 21 is connected with the power supply 3 via an external connection terminal (FIG. 2, FIG. 7).
- the second energizing electrode 22 is connected to the first open electrode 11 (FIG. 2) or the functional circuit 4 (FIG. 7) of the short-circuit element 10A via an external connection terminal.
- the 1st, 2nd electricity supply electrodes 21 and 22 and the heat generating body extraction electrode 52 can also be formed using common electrode materials, such as Cu and Ag, and the 1st, 2nd electricity supply electrodes 21 are used.
- 22 and the surface of the heating element extraction electrode 52 are preferably formed by a known plating process such as Ni / Au plating, Ni / Pd plating, Ni / Pd / Au plating. Thereby, oxidation of the 1st, 2nd electricity supply electrodes 21 and 22 and the heat generating body extraction electrode 52 can be prevented, and a molten conductor can be hold
- the first melting point and the second melting point 24 are melted by the solder connecting the second soluble conductor 24 or the low melting point metal forming the outer layer of the second soluble conductor 24. It is possible to prevent the energization electrodes 21 and 22 and the heating element extraction electrode 52 from being melted (soldered) and cut.
- the open element 20A is formed on almost the entire surface of the second soluble conductor 24 in order to prevent the second soluble conductor 24 from being oxidized and to improve the wettability when the second soluble conductor 24 is melted.
- a flux 57 is applied.
- a cover member 58 is provided on the insulating substrate 50 in order to protect the inside.
- the second current control element 23 operates upon receiving an open signal, whereby electric power is supplied from the power source 3 side, and the second heating element 25 is energized. Generate heat.
- the second fusible conductor 24 is melted by this heat, the molten conductor is placed on the heating element extraction electrode 52, the first and second energizing electrodes 21 and 22, as shown in FIGS. Aggregate.
- the first and second current-carrying electrodes 21 and 22 are opened, and the current path between the power supply 3 and the functional circuit 4 is interrupted (FIGS. 4 and 8).
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Abstract
Description
第1のスイッチ回路1は、図1に示すように、第1、第2の開放電極11,12間を短絡させる短絡部10と、第1、第2の通電電極21,22を開放させる開放部20とを有し、短絡部10と開放部20とが直列に接続されている。第1のスイッチ回路1は、開放部20が、第1のスイッチ回路1によって機能のオンとオフが制御されるデバイスの電源3と接続され、短絡部10が当該デバイスの機能回路4と接続されている。また、第1のスイッチ回路1は、短絡信号を受けて短絡部10を第1、第2の開放電極11,12間が短絡するように電流を制御する第1の電流制御素子13と、開放信号を受けて開放部20を第1、第2の通電電極21,22間が開放するように制御する第2の電流制御素子23とを有する。
短絡素子10Aは、初期段階において開放されている第1、第2の開放電極11,12と、第1の可溶導体14と、第1の可溶導体14を溶融させる第1の発熱体15とを備える。そして短絡素子10Aは、第1の発熱体15を発熱させることにより第1の可溶導体14を溶融させ、この溶融導体によって第1、第2の開放電極11,12間を短絡させるスイッチ16を構成する。また、短絡素子10Aは、第1の開放電極11が開放素子20Aの第2の通電電極22と接続され、第2の開放電極12が、デバイスの機能回路4と接続されている。
開放素子20Aは、通電電極21,22間に配設された第2の可溶導体24と、第2の可溶導体24を溶融させる第2の発熱体25とを備え、第2の発熱体25を発熱させることにより第2の可溶導体24を溶融させ、第1、第2の通電電極21,22間を開放させる。また、開放素子20Aは、第1の通電電極21がデバイスの電源3と接続され、第2の通電電極22が短絡素子10Aの第1の開放電極11と接続されている。
第1のスイッチ回路1は、初期においては、図2に示すように、短絡部10の第1、第2の開放電極11,12間が開放され、開放部20の第1、第2の通電電極21,22間が第2の可溶導体24を介して短絡されている。また、第1のスイッチ回路1は、第1、第2の電流制御素子13,23によって、第1、第2の発熱体15,25への給電が停止されている。これにより、第1のスイッチ回路1は、電源3から機能回路4への給電経路が遮断され、デバイスの機能の一部又は全部が使用不能とされている。
次いで、第2のスイッチ回路2について説明する。なお、以下の説明において、上述した第1のスイッチ回路1と同一の構成については、同一の符号を付してその詳細を省略する。第2のスイッチ回路2は、図6に示すように、短絡部10と開放部20とを有し、短絡部10と開放部20とが、電源3と機能回路4の間で並列に接続されている。また、第2のスイッチ回路2は、短絡信号を受けて短絡部10を第1、第2の開放電極11,12間が短絡するように電流を制御する第1の電流制御素子13と、開放信号を受けて開放部20を第1、第2の通電電極21,22間が開放するように制御する第2の電流制御素子23とを有する。
第2のスイッチ回路2において、短絡素子10Aは、第1の開放電極11が電源3と接続され、第2の開放電極12が、デバイスの機能回路4と接続されている。短絡素子10Aのその他の構成は、上述したとおりである。
第2のスイッチ回路2において、開放素子20Aは、第1の通電電極21がデバイスの電源3と接続され、第2の通電電極22がデバイスの機能回路4と接続されている。開放素子20Aのその他の構成は、上述したとおりである。
第2のスイッチ回路2は、初期においては、図7に示すように、短絡部10の第1、第2の開放電極11,12間が開放され、開放部20の第1、第2の通電電極21,22間が第2の可溶導体24を介して短絡されている。また、第2のスイッチ回路2は、第1、第2の電流制御素子13,23によって、第1、第2の発熱体15,25への給電が停止されている。これにより、第2のスイッチ回路2は、開放部20を介して、電源3から機能回路4への給電経路が確保され、デバイスの機能が使用可能とされている。
[短絡素子]
次いで、短絡素子10Aの構成例について説明する。図11(A)に、短絡素子10Aの平面図を示し、図11(B)に、短絡素子10Aの断面図を示す。短絡素子10Aは、絶縁基板30と、絶縁基板30に設けられた第1の発熱体15と、絶縁基板30に、互いに隣接して設けられた第1の開放電極11及び第2の開放電極12と、第1の開放電極11と隣接して設けられるとともに、第1の発熱体15に電気的に接続された第3の電極31と、第2の開放電極12と隣接して設けられた第4の電極32と、第1の開放電極11と第3の電極31との間に亘って設けられることにより電流経路を構成し、第1の発熱体15からの加熱により、第1の開放電極11と第3の電極31との間の電流経路を溶断するとともに第1、第2の開放電極11,12間を短絡させる第1の可溶導体14aと、第2の開放電極12と第4の電極32との間に亘って設けられ、第1の発熱体15からの加熱によって溶融し、第1、第2の開放電極11,12間を短絡させる第1の可溶導体14bとを備える。そして、短絡素子10Aは、絶縁基板30上に内部を保護するカバー部材33が取り付けられている。
第1の可溶導体14a,14bは、第1の発熱体15の発熱により速やかに溶断されるいずれの金属を用いることができ、例えば、Snを主成分とするPbフリーハンダ等の低融点金属を好適に用いることができる。
次いで、開放素子20Aの構成例について説明する。開放素子20Aは、図13(A)に示すように、絶縁基板50と、絶縁基板50に積層され、絶縁部材51に覆われた第2の発熱体25と、絶縁基板50の両端に形成された第1の通電電極21及び第2の通電電極22と、絶縁部材51上に第2の発熱体25と重畳するように積層された発熱体引出電極52と、両端が第1、第2の通電電極21,22にそれぞれ接続され、中央部が発熱体引出電極52に接続された第2の可溶導体24とを備える。
Claims (6)
- 第1の可溶導体と、上記第1の可溶導体を溶融させる第1の発熱体とを備え、上記第1の発熱体を発熱させることにより上記第1の可溶導体を溶融させ、該溶融導体によって開放電極間を短絡させる短絡部と、
通電電極間に配設された第2の可溶導体と、上記第2の可溶導体を溶融させる第2の発熱体とを備え、上記第2の発熱体を発熱させることにより上記第2の可溶導体を溶融させ、上記通電電極間を開放する開放部と、
上記第1の発熱体への給電を制御する第1の電流制御素子と、
上記第2の発熱体への給電を制御する第2の電流制御素子とを有し、
上記短絡部の上記開放電極と上記開放部の上記通電電極とが直列に接続されたスイッチ回路。 - 上記第1の電流制御素子により上記短絡部の上記開放電極間を短絡させ、回路全体を遮断状態から通電状態へ切り替え、
上記第2の電流制御素子により上記開放部の上記通電電極間を開放させ、回路全体を通電状態から再度遮断状態へ切り替える請求項1記載のスイッチ回路。 - 第1の可溶導体と、上記第1の可溶導体を溶融させる第1の発熱体とを備え、上記第1の発熱体を発熱させることにより上記第1の可溶導体を溶融させ、該溶融導体によって開放電極間を短絡させる短絡部と、
通電電極間に配設された第2の可溶導体と、上記第2の可溶導体を溶融させる第2の発熱体とを備え、上記第2の発熱体を発熱させることにより上記第2の可溶導体を溶融させ、上記通電電極間を開放する開放部と、
上記第1の発熱体への給電を制御する第1の電流制御素子と、
上記第2の発熱体への給電を制御する第2の電流制御素子とを有し、
上記短絡部の上記開放電極と上記開放部の上記通電電極とが並列に接続されたスイッチ回路。 - 上記第2の電流制御素子により上記開放部の上記通電電極間を開放させ、回路全体を通電状態から遮断状態へ切り替え、
上記第1の電流制御素子により上記短絡部の上記開放電極間を短絡させ、回路全体を遮断状態から再度通電状態へ切り替える請求項3記載のスイッチ回路。 - 第1の可溶導体と、上記第1の可溶導体を溶融させる第1の発熱体とを備え、上記第1の発熱体を発熱させることにより上記第1の可溶導体を溶融させ、該溶融導体によって開放電極間を短絡させる短絡部と、
通電電極間に配設された第2の可溶導体と、上記第2の可溶導体を溶融させる第2の発熱体とを備え、上記第2の発熱体を発熱させることにより上記第2の可溶導体を溶融させ、上記通電電極間を開放する開放部と、
上記第1の発熱体への給電を制御する第1の電流制御素子と、
上記第2の発熱体への給電を制御する第2の電流制御素子とを有し、
上記短絡部の上記開放電極と上記開放部の上記通電電極とが直列に接続され、
上記第1の電流制御素子により上記短絡部の上記開放電極間を短絡させ、回路全体を遮断状態から通電状態へ切り替え、
上記第2の電流制御素子により上記開放部の上記通電電極間を開放させ、回路全体を通電状態から再度遮断状態へ切り替えるスイッチ制御方法。 - 第1の可溶導体と、上記第1の可溶導体を溶融させる第1の発熱体とを備え、上記第1の発熱体を発熱させることにより上記第1の可溶導体を溶融させ、該溶融導体によって開放電極間を短絡させる短絡部と、
通電電極間に配設された第2の可溶導体と、上記第2の可溶導体を溶融させる第2の発熱体とを備え、上記第2の発熱体を発熱させることにより上記第2の可溶導体を溶融させ、上記通電電極間を開放する開放部と、
上記第1の発熱体への給電を制御する第1の電流制御素子と、
上記第2の発熱体への給電を制御する第2の電流制御素子とを有し、
上記短絡部の上記開放電極と上記開放部の上記通電電極とが並列に接続され、
上記第2の電流制御素子により上記開放部の上記通電電極間を開放させ、回路全体を通電状態から遮断状態へ切り替え、
上記第1の電流制御素子により上記短絡部の上記開放電極間を短絡させ、回路全体を遮断状態から再度通電状態へ切り替えるスイッチ制御方法。
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