WO2012105014A1 - 放電素子およびその製造方法 - Google Patents
放電素子およびその製造方法 Download PDFInfo
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- WO2012105014A1 WO2012105014A1 PCT/JP2011/052171 JP2011052171W WO2012105014A1 WO 2012105014 A1 WO2012105014 A1 WO 2012105014A1 JP 2011052171 W JP2011052171 W JP 2011052171W WO 2012105014 A1 WO2012105014 A1 WO 2012105014A1
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- electrode
- discharge
- discharge element
- internal space
- base
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
- H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/04—Electrodes specially adapted therefor or their manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/04—Housings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
Definitions
- the present invention relates to a discharge element and a manufacturing method thereof.
- a surge current generated by a lightning strike may enter a communication device including a telephone. If surge current enters a communication device, the communication device may be destroyed or malfunction may occur. Therefore, a discharge element (also called a surge absorber) for escaping the surge current by discharging is attached to the communication device for protection from the surge current.
- a discharge element also called a surge absorber
- a gap-type discharge element which is a type of discharge element, flows into the spark gap when a surge current enters. Thus, since the surge current flows through the discharge element, the surge current can be prevented from entering the communication device.
- a discharge element described in Patent Document 1 which is this type of discharge element is a glass tube in which a plurality of conductive thin films are formed by being spaced apart by a spark gap having a predetermined size, and both ends are fused and hermetically sealed. It has the structure arranged in. Two lead wires with terminals are introduced into the glass tube, and each terminal is connected to each of the conductive thin films located at both ends.
- the glass tube is filled with a gas for adjusting the discharge voltage.
- the present invention has been made in view of the above, and an object thereof is to provide a discharge element having a simple structure, a high manufacturing yield, and a low cost, and a simple manufacturing method thereof.
- a discharge element is made of a conductive material capable of plastic deformation, and includes a first space having an internal space and an opening communicating with the internal space.
- the discharge element according to the present invention is characterized in that, in the above-mentioned invention, the first electrode has a deformed portion protruding into the internal space toward the second electrode.
- the discharge element according to the present invention is characterized in that, in the above invention, the first electrode has a bellows structure for adjusting the size of the spark gap.
- the discharge element according to the present invention is characterized in that, in the above-described invention, the internal space of the first electrode is filled with a discharge start voltage adjusting gas.
- the discharge element according to the present invention is characterized in that, in the above invention, the first electrode has a gas introduction path in which one end communicates with the internal space and the other end is hermetically sealed.
- the discharge element according to the present invention is characterized in that, in the above invention, the second electrode has a gas introduction path in which one end communicates with the internal space and the other end is hermetically sealed.
- the discharge element according to the present invention is characterized in that, in the above invention, a gap is formed between the first electrode and the base, and the gap is hermetically closed by a bonding material.
- the discharge element according to the present invention is characterized in that, in the above invention, a gap is formed between the second electrode and the base, and the gap is hermetically closed by a bonding material.
- the discharge element according to the present invention is characterized in that, in the above-mentioned invention, a discharge trigger is disposed between the first electrode and the second electrode.
- the discharge element manufacturing method includes a first electrode made of a conductive material capable of plastic deformation, having an internal space and an opening communicating with the internal space, and a base made of an insulating material. And a second electrode made of a conductive material, and the substrate is hermetically bonded to the opening of the first electrode so that the internal space becomes an airtight space, and the substrate is interposed through the base. The second electrode is inserted into an internal space so that a spark gap is formed between the first electrode and the second electrode.
- the discharge element manufacturing method according to the present invention is characterized in that, in the above invention, the method further includes a step of adjusting the size of the spark gap by deforming the first electrode.
- the discharge element manufacturing method includes a step of introducing and filling a discharge start voltage adjusting gas into the internal space of the first electrode via a gas introduction path in the above invention, and the gas A step of hermetically sealing the introduction path, and after the step of hermetically sealing, a step of adjusting the size of the spark gap is performed.
- the discharge element manufacturing method according to the present invention is characterized in that, in the above-described invention, the discharge start voltage adjusting gas is introduced from the gas introduction path of the first electrode.
- the discharge element manufacturing method according to the present invention is characterized in that, in the above-described invention, the discharge start voltage adjusting gas is introduced from the gas introduction path of the second electrode.
- the discharge element manufacturing method according to the present invention is characterized in that, in the above invention, the discharge start voltage adjusting gas is introduced using the gap between the first electrode and the base as the gas introduction path.
- the discharge element manufacturing method according to the present invention is characterized in that, in the above invention, the discharge start voltage adjusting gas is introduced using the gap between the second electrode and the base as the gas introduction path.
- FIG. 1 is a schematic perspective view of a discharge element according to Embodiment 1.
- FIG. FIG. 2 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- FIG. 3 is a flowchart for explaining a method of manufacturing the discharge element shown in FIG.
- FIG. 4 is a diagram for explaining the manufacturing method shown in FIG.
- FIG. 5 is a diagram for explaining the manufacturing method shown in FIG.
- FIG. 6 is a schematic perspective view of the discharge element according to the second embodiment.
- FIG. 7 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- FIG. 8 is a schematic perspective view of the discharge element according to the third embodiment.
- FIG. 9 is a diagram illustrating a method for manufacturing the discharge element according to the fourth embodiment.
- FIG. 10 is a schematic perspective view of the discharge element according to the fifth embodiment.
- FIG. 11 is a schematic cross-sectional view of the discharge element shown in FIG. 12 is a diagram for explaining a method of manufacturing the discharge element shown in FIG.
- FIG. 13 is a schematic perspective view of a discharge element according to the sixth embodiment.
- FIG. 14 is a diagram illustrating a method for adjusting the discharge start voltage of the discharge element shown in FIG.
- FIG. 15 is a schematic exploded perspective view of the discharge element according to the seventh embodiment.
- FIG. 16 is a schematic perspective view of a discharge element according to the eighth embodiment.
- FIG. 17 is a schematic bottom view of the discharge element shown in FIG. 18 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- FIG. 19 is a schematic bottom view of a discharge element according to Modification 1 of Embodiment 8.
- FIG. 20 is a schematic bottom view of a discharge element according to Modification 2 of Embodiment 8.
- FIG. 1 is a schematic perspective view of a discharge element according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- the discharge element 100 includes a base 10, a first electrode 20, and a second electrode 30.
- the base 10 includes a cylindrical lower part 11 and a cylindrical upper part 12 positioned on the lower part 11 and having a slightly smaller outer diameter than the lower part 11, and has a hole 13 through which the second electrode 30 is inserted. is doing.
- the base 10 is made of an insulating material such as ceramics.
- the first electrode 20 is made of a conductive material that can be plastically deformed, such as brass, and has an internal space 21 formed in a cylindrical main body, an opening 22 that communicates with the internal space 21, and two terminals 23.
- the gas introduction part 24 and the deformation part 25 are provided.
- the outer diameter of the first electrode 20 is, for example, 5 mm and the height is 6 mm, but there is no particular limitation.
- the upper portion 12 of the base 10 is fitted into the opening 22 of the first electrode 20, and is joined by a joining material such as a solder material, low-melting glass or adhesive. Thereby, the base 10 is airtightly joined to the opening 22 so that the internal space 21 of the first electrode 20 becomes an airtight space.
- a joining material such as a solder material, low-melting glass or adhesive.
- discharge start voltage adjustment of air argon gas, neon gas, hydrogen gas, carbon dioxide gas, carbon tetrachloride gas (CCl 4 ), sulfur hexafluoride (SF 6 ) gas, air, etc.
- the working gas is filled at a predetermined pressure.
- the terminal 23 is provided at the lower part of the first electrode 20 and extends to the lower side of the lower part 11 through the side surface of the lower part 11 of the base 10.
- the gas introduction part 24 is provided on the upper part of the first electrode 20.
- the gas introduction part 24 is tubular and has a gas introduction path 24a and a sealing part 24b.
- One end portion of the gas introduction path 24a communicates with the internal space 21, and the other end portion is hermetically sealed by the sealing portion 24b.
- This sealing part 24b is formed by crushing the edge part of the gas introduction part 24, for example.
- the deformed portion 25 is formed by plastically deforming the side surface of the first electrode 20 so as to protrude into the internal space 21 toward the second electrode 30.
- the second electrode 30 is made of a conductive material such as copper and has a terminal 31 and a discharge part 32.
- the terminal 31 has a rod shape, is inserted into the internal space 21 of the first electrode 20 through the hole 13 of the base 10, and is airtightly joined to the base 10 with a bonding material.
- the discharge part 32 is disk shape, and is connected to the edge part of the side by which the terminal 31 was penetrated in the internal space 21 so that the surface may become substantially perpendicular
- the amount of protrusion of the deformable portion 25 of the first electrode 20 into the internal space 21 is such that the spark gap G1 (see FIG. 2) between the deformable portion 25 and the discharge portion 32 of the second electrode 30 is within a predetermined range. It has been adjusted.
- the discharge element 100 in which the protruding amount of the deformable portion 25 is adjusted is attached to the communication device.
- the discharge element 100 can be easily mounted on the board by inserting the terminal 23 of the first electrode 20 and the terminal 31 of the second electrode 30 into a mounting hole of a predetermined circuit board.
- the discharge start voltage is filled in the internal space 21. It is determined by Paschen's law from the type and pressure of the discharge start voltage adjusting gas and the size (gap length) of the spark gap G1.
- the first electrode 20 can be deformed to form the deformed portion 25. Therefore, even if the discharge element 100 has a discharge start voltage outside the predetermined range at the time of assembly, the discharge start voltage can be adjusted by adjusting the protruding amount of the deformable portion 25 after assembly. Therefore, the discharge element 100 has a high manufacturing yield and a low cost.
- the discharge element 100 since the discharge element 100 has a small number of component parts, the cost of parts can be reduced and the manufacturing process is simplified, so that further cost reduction can be achieved. Moreover, the discharge element 100 does not require a high-temperature process of 700 ° C. or higher necessary for melting glass, for example, in the manufacturing process. For example, when airtight joining between the base 10, the first electrode 20, and the second electrode 30 is performed using a solder material, low melting point glass, or the like, it is only necessary to perform a heating process at 400 ° C. or lower. Therefore, the thermal stress of the discharge element 100 can be minimized and the burden on the manufacturing facility is reduced. As a result, the discharge element 100 can be manufactured with simple and low-cost equipment.
- FIG. 3 is a flowchart for explaining a method of manufacturing the discharge element 100 shown in FIG.
- the components of the discharge element 100 are assembled (step S101).
- a discharge start voltage adjusting gas is introduced into the internal space 21 of the discharge element 100 (step S102).
- the internal space 21 of the discharge element 100 is hermetically sealed (step S103).
- the discharge element 100 is not within the range of the predetermined discharge start voltage (No at Step S104), the first electrode 20 is deformed to form the deformed portion 25 (Step S105), and the discharge element 100 further starts the predetermined discharge. Judge whether it is within the voltage range. If the discharge element 100 is within the predetermined discharge start voltage range (step S104, Yes), the process is terminated.
- FIG. 4 and 5 are diagrams for explaining the manufacturing method shown in FIG. First, as shown in FIG. 4, the base 10, the first electrode 20, and the second electrode 30 are assembled. At this time, the sealing portion 24b of the gas introduction portion 24 is not formed in the first electrode 20, and the deformation portion 25 is not formed.
- This assembly can be done by any procedure, for example, as follows. First, the terminal 31 of the second electrode 30 is inserted into the hole 13 of the base 10. At this time, insertion is performed so that the discharge part 32 is located on the upper part 12 side of the base 10. Next, the upper part 12 of the base 10 is fitted into the opening 22 of the first electrode 20. Accordingly, the discharge part 32 is accommodated in the internal space 21 of the first electrode 20. Next, the base 10 and the first electrode 20 are hermetically joined. Similarly, the base 10 and the second electrode 30 are hermetically joined.
- the initial value of the discharge start voltage can be freely set even when the same first electrode 20 is used.
- the discharge start voltage adjusting gas g is introduced into the internal space 21 of the first electrode 20 from the gas introduction path 24 a of the gas introduction part 24.
- the introduction of the discharge start voltage adjusting gas g is preferably performed after the internal space 21 is in a reduced pressure state.
- the internal space 21 of the first electrode 20 has a small volume, it can be evacuated quickly and easily and can be filled with the discharge start voltage adjusting gas g. Further, the discharge start voltage adjusting gas g to be used is small, and only the necessary amount can be used with little waste.
- a surge current is applied between the terminal 23 of the first electrode 20 and the terminal 31 of the second electrode 30 while adjusting the voltage, and the discharge start voltage of the discharge element 100 is measured.
- the discharge start voltage of the discharge element 100 is measured.
- the predetermined discharge start voltage range is set as a range of discharge start voltages allowed as a product based on, for example, product specifications. If the measured discharge start voltage is within the range of the predetermined discharge start voltage, the manufactured discharge element 100 is regarded as a non-defective product and the process ends.
- the measured discharge start voltage is not within the range of the predetermined discharge start voltage, as shown in FIG. 5, pressure is applied to the side surface of the first electrode 20 and plastic deformation is performed so that the side surface protrudes into the internal space 21.
- the deformation part 25 is formed.
- the gap length of the spark gap G1 between the first electrode 20 and the second electrode 30 is reduced, so that the discharge start voltage is reduced.
- the discharge start voltage changes from 800V to 400V.
- the absolute value of the discharge start voltage and the amount of change thereof are not limited to this.
- the discharge start voltage is measured again, and it is determined whether the measured discharge start voltage is within a predetermined range of the discharge start voltage. If the measured discharge start voltage is within the range of the predetermined discharge start voltage, the manufactured discharge element 100 is finished as a non-defective product, and if not, the pressure is further applied to the deformed portion 25 to be further deformed. . Thereby, the protrusion amount of the deformable portion 25 is adjusted to be further increased. At this time, another deformation portion may be formed by applying pressure to a portion other than the deformation portion 25 of the first electrode 20.
- the discharge start voltage is adjusted within the predetermined range to be a non-defective product. be able to. Therefore, according to this manufacturing method, the discharge element 100 having a discharge start voltage within a predetermined range can be manufactured with a high yield, and the manufacturing yield can be improved.
- transformation part 25 calculates
- FIG. 6 is a schematic perspective view of a discharge element according to Embodiment 2 of the present invention.
- FIG. 7 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- the discharge element 200 includes a base 10, a first electrode 20 ⁇ / b> A, and a second electrode 30. Since the base 10 and the second electrode 30 are the same as the corresponding elements of the discharge element 100 of the first embodiment, the first electrode 20A will be specifically described below.
- the first electrode 20 ⁇ / b> A is made of a conductive material that can be plastically deformed, such as brass, like the first electrode 20 of the discharge element 100, and communicates with the internal space 21 formed in the cylindrical main body and the internal space 21.
- the opening 22, the two terminals 23, and the gas introduction part 24 are provided.
- the first electrode 20 ⁇ / b> A has a groove 26 on the side surface and a deformed portion 25 formed at the position of the groove 26.
- the groove 26 has the same height as the discharge part 32 of the second electrode 30 and is formed along the outer periphery of the first electrode 20A.
- the internal space 21 is filled with a discharge start voltage adjusting gas.
- the discharge element 200 can deform the first electrode 20A to form the deformed portion 25 and adjust the discharge start voltage. Therefore, the discharge element 200 has a high manufacturing yield and a low cost.
- the deformed portion 25 may be formed with reference to the position of the groove 26 formed at the same height as the discharge portion 32 of the second electrode 30.
- the discharge start voltage can be adjusted with higher accuracy and more easily.
- the deformed portion 25 may be formed in a part of the groove 26 or may be formed along the groove 26.
- FIG. 8 is a schematic perspective view of a discharge element according to Embodiment 3 of the present invention.
- the discharge element 300 includes a base 10 ⁇ / b> A, a first electrode 20 ⁇ / b> B, and a second electrode 30. Since the second electrode 30 is the same as the corresponding element of the discharge element 100 of the first embodiment, the base 10A and the first electrode 20A will be specifically described below.
- the base 10A is cylindrical and has a hole (not shown) through which the second electrode 30 is inserted.
- the base 10A is made of an insulating material such as ceramics.
- the first electrode 20B is made of a conductive material that can be plastically deformed, such as brass, like the first electrode 20 of the discharge element 100, and communicates with the internal space 21 formed in the cylindrical body and the internal space 21.
- the opening 22, the two terminals 23, the gas introduction part 24, and the deformation part 25 are provided.
- the first electrode 20B has a flange portion 27 formed at the lower portion of the main body.
- the outer diameter of the flange portion 27 is substantially the same as the outer diameter of the base 10A.
- the two terminals 23 extend downward from the flange portion 27.
- the first electrode 20B is placed on the base 10A and joined to the base 10 with a joining material.
- the base 10A is airtightly joined to the opening 22 so that the internal space 21 of the first electrode 20B becomes an airtight space.
- the internal space 21 is filled with a discharge start voltage adjusting gas.
- the discharge element 300 can adjust the discharge start voltage by deforming the first electrode 20B to form the deformed portion 25. Therefore, the discharge element 300 has a high manufacturing yield and a low cost.
- the first electrode 20B has the flange portion 27, and the two terminals 23 extend downward from the flange portion 27. Therefore, if the width of the flange portion 27 is increased, the outer diameter of the main body of the first electrode 20B is maintained while maintaining the distance L between the terminal 23 of the first electrode 20B and the terminal 31 of the second electrode 30 at a predetermined value. Can be reduced.
- the mounting hole interval may not be smaller than a predetermined value in order to ensure the insulation resistance of the board itself.
- a discharge element having a low discharge start voltage on such a substrate.
- the discharge element 300 can be mounted while ensuring a creepage distance because the discharge start voltage can be set small by reducing the outer diameter of the main body of the first electrode 20B while maintaining the distance L between the terminals larger than a predetermined value. It is also suitable for mounting on a substrate where the hole interval cannot be reduced.
- FIG. 9 is a diagram illustrating a method for manufacturing the discharge element according to the fourth embodiment.
- first, the base 10, the first electrode 20C, and the second electrode 30 are assembled, for example, in the same manner as the manufacturing method of the discharge element 100 described above.
- the first electrode 20C has a tubular main body, and has an internal space 21 that is the inside of the circular tube, openings 22 and 22A that communicate with the internal space 21, and two terminals 23 that are provided at the bottom of the main body. Yes.
- the base 10 is fitted into the opening 22 and is airtightly joined.
- the discharge start voltage adjusting gas g is introduced into the internal space 21 using the upper opening 22A of the assembled first electrode 20C as a gas introduction path.
- the upper part of the first electrode 20 ⁇ / b> C is crushed to form the sealing portion 28, and the internal space 21 is made an airtight space.
- the discharge element 400 having a predetermined discharge start voltage can be manufactured by measuring and determining the discharge start voltage and forming the appropriate deformed portion 25.
- the discharge element 400 can adjust the discharge start voltage by deforming the first electrode 20C to form the deformed portion 25. Therefore, the discharge element 400 has a high manufacturing yield and a low cost. Furthermore, since the discharge element 400 uses the first electrode 20C having a simple structure, further cost reduction can be realized.
- FIG. 10 is a schematic perspective view of the discharge element according to the fifth embodiment.
- FIG. 11 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- the discharge element 500 includes a base 10B, a first electrode 20D, and a second electrode 30A.
- the base 10B is composed of a cylindrical lower portion 11 and a cylindrical upper portion 12 positioned on the lower portion 11 and having a slightly smaller outer diameter than the lower portion 11, and has a hole 13B through which the second electrode 30A is inserted. is doing.
- the base 10B is made of an insulating material such as ceramics.
- the first electrode 20D is made of a conductive material that can be plastically deformed, such as brass, and includes an internal space 21 formed by a cylindrical main body, an opening 22 that communicates with the internal space 21, and two terminals 23. And a deformable portion 25.
- the deformable portion 25 is formed by plastically deforming the upper surface of the first electrode 20D so as to protrude into the internal space 21 toward the second electrode 30A.
- the upper part 12 of the base 10B is fitted into the opening 22 of the first electrode 20D and joined by a joining material. Thereby, the base 10B is airtightly joined to the opening 22 so that the internal space 21 of the first electrode 20D becomes an airtight space.
- the internal space 21 is filled with a discharge start voltage adjusting gas.
- the second electrode 30A is made of a conductive material such as copper and has a terminal 31A and a discharge part 32A.
- the terminal 31A is inserted into the internal space 21 of the first electrode 20D from the hole 13B of the base 10B, and is hermetically joined to the base 10B with a joining material. Further, the terminal 31A has a gas introduction path 31a and a sealing portion 31b. One end of the gas introduction path 31a communicates with the internal space 21, and the other end is hermetically sealed by the sealing portion 31b.
- the sealing portion 31b is formed, for example, by crushing the end portion of the terminal 31A.
- the discharge part 32A has a disk shape in which an opening 32a for allowing the gas introduction path 31a to communicate with the internal space 21 is formed in the center, and the end of the terminal 31A on the side inserted into the internal space 21 The plane is connected so as to be substantially perpendicular to the terminal 31A.
- the amount of protrusion of the deformable portion 25 of the first electrode 20D into the internal space 21 is such that the spark gap G2 (see FIG. 11) between the deformable portion 25 and the discharge portion 32A of the second electrode 30A is within a predetermined range. Adjusted.
- the discharge element 500 forms the deformed portion 25 on the first electrode 20D, the deformable portion 25 is easily formed. As a result, the manufacturing process is simplified, and the manufacturing yield is improved and the cost is reduced. Further, a gas introduction path 31a for introducing a discharge start voltage adjusting gas into the internal space 21 of the first electrode 20D is formed at the terminal 31A of the second electrode 30A. Therefore, the gas introduction path can be provided in the discharge element 500 with a simpler structure than when the gas introduction path is provided in the first electrode.
- FIG. 12 is a diagram for explaining a method of manufacturing the discharge element shown in FIG.
- the base 10B, the first electrode 20D, and the second electrode 30A are assembled in the same manner as in the method for manufacturing the discharge element 100 described above.
- the sealing portion 31b is not formed on the terminal 31A of the second electrode 30A, and the deformation portion 25 is not formed on the first electrode 20D.
- the discharge start voltage adjusting gas g is introduced into the internal space 21 of the first electrode 20D from the gas introduction path 31a of the terminal 31A of the second electrode 30A.
- the introduction of the discharge start voltage adjusting gas g is preferably performed after the internal space 21 is in a reduced pressure state.
- the end portion of the terminal 31A is crushed to form the sealing portion 31b.
- the internal space 21 is hermetically sealed in a state filled with the discharge start voltage adjusting gas g.
- a surge current is applied between the terminal 23 of the first electrode 20D and the terminal 31A of the second electrode 30A while adjusting the voltage, and the discharge start voltage is measured.
- the discharge start voltage is measured again, and it is determined whether the measured discharge start voltage is within a predetermined range of the discharge start voltage. If the measured discharge start voltage is within the range of the predetermined discharge start voltage, the manufactured discharge element 500 is finished as a non-defective product, and if not, the pressure is further applied to the deformed portion 25 to be further deformed. . Thereby, the protrusion amount of the deformable portion 25 is adjusted to be further increased. By repeating this process and adjusting the discharge start voltage, even if the discharge element 500 has a discharge start voltage outside the predetermined range at the time of assembly, the discharge start voltage is adjusted within the predetermined range to be a non-defective product. be able to.
- the discharge element 500 having a discharge start voltage within a predetermined range can be manufactured with a high yield, and the manufacturing yield can be improved.
- the deformed portion 25 is formed on the upper surface of the first electrode 20D, but the deformed portion 25 may be formed on the side surface of the first electrode 20D.
- the method of inserting an electrode terminal having a gas introduction path into the airtight space and introducing a predetermined gas into the airtight space from the gas introduction path, and then sealing one end of the electrode terminal in an airtight manner is applicable not only to the manufacture of discharge elements. That is, this method has a structure in which an electronic element is hermetically sealed in a container filled with a predetermined gas, and a terminal for supplying power to the electronic element extends from the inside of the container to the outside.
- the present invention can also be applied to the manufacture of electronic devices.
- the first electrode has a bellows structure.
- FIG. 13 is a schematic perspective view of the discharge element according to the sixth embodiment.
- the discharge element 600 includes a base 10, a first electrode 20 ⁇ / b> E, and a second electrode 30. Since the base 10 and the second electrode 30 are the same as the corresponding elements of the discharge element 100 of the first embodiment, the first electrode 20E will be specifically described below.
- the first electrode 20E is made of a conductive material that can be plastically deformed, such as brass, and has an inner space 21 formed by a cylindrical body having a bellows structure 29, an opening 22 communicating with the inner space 21, It has two terminals 23 and a gas introduction part 24.
- FIG. 14 is a diagram for explaining a method for adjusting the discharge start voltage of the discharge element shown in FIG.
- the discharge element 600 is first assembled so that the peak portion 29a of the bellows structure 29 of the first electrode 20E and the discharge portion 32 of the second electrode 30 have the same height.
- a spark gap G3 is formed between the first electrode 20E and the second electrode 30.
- the first electrode 20E is expanded and contracted in the height direction, and the entire first electrode 20E is deformed.
- the side surface of the first electrode 20 ⁇ / b> E closest to the discharge part 32 moves relatively from the peak part 29 a to the valley part 29 b of the bellows structure 29.
- the gap length of the spark gap between the first electrode 20E and the second electrode 30 also changes continuously.
- the discharge start voltage of the discharge element 600 can be continuously changed and adjusted to a predetermined value.
- the valley portion 29b and the discharge portion 32 are at the same height, the spark gap G4 having the smallest gap length is obtained.
- the discharge start voltage can be continuously changed and adjusted to a predetermined value by a simple method of expanding and contracting the first electrode 20E in the height direction.
- the discharge start voltage may be adjusted by extending the first electrode 20E in the height direction.
- you may assemble so that the trough part 29b and the discharge part 32 of the 2nd electrode 30 may become the same height first.
- the discharge element according to the seventh embodiment includes a discharge trigger.
- FIG. 15 is a schematic exploded perspective view of the discharge element according to the seventh embodiment.
- the discharge element 700 is configured by attaching a ring-shaped discharge trigger 40 to the surface of the upper portion 12 of the base 10 of the discharge element 100.
- the discharge trigger 40 is made of a conductive material such as carbon.
- the discharge element 700 includes the discharge trigger 40 disposed between the first electrode 20 and the second electrode 30, the discharge current flows until the discharge current flows between the first electrode 20 and the second electrode 30.
- the response time is shortened and the response is high.
- the shape of the discharge trigger and the mounting position are not particularly limited as long as the response time can be shortened.
- FIG. 16 is a schematic perspective view of the discharge element according to the eighth embodiment.
- FIG. 17 is a schematic bottom view of the discharge element shown in FIG. 18 is a schematic partial cross-sectional view of the discharge element shown in FIG.
- the discharge element 800 includes a base 10C, a first electrode 20F, and a second electrode 30.
- the base 10C is cylindrical and has a hole 13 through which the terminal 31 of the second electrode 30 is inserted.
- the base 10C is made of an insulating material.
- the first electrode 20F is made of a conductive material capable of plastic deformation, and includes an internal space 21 formed by a cylindrical main body, an opening 22 communicating with the internal space 21, two terminals 23, and a deformation portion. 25.
- the deformed portion 25 is formed by plastically deforming the side surface of the first electrode 20F so as to protrude into the internal space 21 toward the discharge portion 32 of the second electrode 30.
- a spark gap G5 is formed between the first electrode 20F and the second electrode 30.
- the outer diameter of the base 10C is smaller than the inner diameter of the opening 22 of the first electrode 20F. Therefore, in a state where the base 10C is inserted into the opening 22, a gap G10 is formed between the first electrode 20F and the base 10C. The gap G10 is blocked by the bonding material B. Thus, the base 10C is airtightly joined to the opening 22 so that the internal space 21 of the first electrode 20F becomes an airtight space.
- the internal space 21 is filled with a discharge start voltage adjusting gas.
- a discharge start voltage adjusting gas is introduced into the internal space 21 of the first electrode 20F using the gap G10 as a gas introduction path. To do. Thereafter, the gap G10 is closed by the bonding material B, and the internal space 21 is made an airtight space. Therefore, a desired discharge start voltage adjusting gas can be easily introduced into the internal space 21 by using the base 10C, the first electrode 20F, and the second electrode 30 having a simple structure. Thereafter, the discharge voltage is measured and an appropriate deformed portion 25 is formed, and the spark gap G5 is adjusted.
- the bonding material B a solder material, a low melting point glass, an adhesive, or the like can be used.
- the deformed portion 25 is formed on the side surface of the first electrode 20F, but may be formed on the upper surface.
- the gap G10 is formed over the entire circumference of the base 10C. However, a gap with the first electrode may be provided in a part of the periphery of the base, and this may be used as a gas introduction path. .
- FIG. 19 is a schematic bottom view of a discharge element according to Modification 1 of Embodiment 8.
- the outer diameter of the base 10D is substantially the same as the inner diameter of the opening 22 of the first electrode 20F, but the notch 14 is formed in a part of the outer periphery of the base 10D.
- the notch 14 communicates with the internal space 21 of the first electrode 20 ⁇ / b> F, but is closed by the bonding material B.
- the outer peripheral portion other than the notch 14 of the base 10D is also hermetically bonded to the first electrode 20F. Thereby, the internal space 21 of the first electrode 20F is airtight.
- the base 10D When manufacturing the discharge element 800A, the base 10D is fitted into the opening 22 of the first electrode 20F, and the outer peripheral portion other than the notch 14 is hermetically joined, and then the notch 14 is used as a gas introduction path to the first electrode 20F.
- the gas for adjusting the discharge start voltage is introduced into the internal space 21 of the battery. Thereafter, the notch 14 is closed with the bonding material B, and the internal space 21 is made an airtight space. Therefore, a desired discharge start voltage adjusting gas can be easily introduced into the internal space 21 using the base 10D, the first electrode 20F, and the second electrode 30 having a simple structure.
- the step of airtightly bonding the base 10D to the opening 22 of the first electrode 20F and the step of closing the notch 14 may be performed in the reverse order or simultaneously.
- FIG. 20 is a schematic bottom view of the discharge element according to the second modification of the eighth embodiment.
- the outer diameter of the base 10E is substantially the same as the inner diameter of the opening 22 of the first electrode 20F, and the base 10E and the first electrode 20F are airtightly joined.
- the inner diameter of the hole 13c of the base 10E for inserting the terminal 32 is larger than the outer diameter of the terminal 32 of the second electrode 30.
- a gap G11 is formed between the terminal 32 and the base 10E.
- the gap G11 is closed by the bonding material B.
- the internal space 21 of the first electrode 20F is airtight.
- the base 10E When manufacturing the discharge element 800B, the base 10E is fitted into the opening 22 of the first electrode 20F and hermetically joined, and then discharge is started in the internal space 21 of the first electrode 20F using the gap G11 as a gas introduction path. Introduce voltage adjustment gas. Thereafter, the gap G11 is closed by the bonding material B, and the internal space 21 is made an airtight space. Therefore, a desired discharge start voltage adjusting gas can be easily introduced into the internal space 21 using the base 10E, the first electrode 20F, and the second electrode 30 having a simple structure. Note that the step of airtightly bonding the base 10E to the opening 22 of the first electrode 20F and the step of closing the gap G11 may be performed in the reverse order or simultaneously.
- the first electrode does not necessarily have to be deformed to adjust the discharge start voltage thereafter.
- the first electrode is not particularly limited as long as it is made of a conductive material that can be plastically deformed, and those made of various metals and semiconductors can be used.
- the number of terminals formed on the first electrode is not limited to two, and may be one or more than three.
- the number of terminals formed on the second electrode is not limited to one and may be two or more.
- the method for joining the first electrode and the second electrode to the base is not limited to the method using a joining material.
- the first electrode, the second electrode, and the base are preferably made of materials that are somewhat soft.
- tin is preferable as the electrode material.
- the electrode material and the shape of the electrode are not particularly limited as long as an airtight state can be maintained.
- the present invention is not limited by the above embodiment. What was comprised combining the above-mentioned each component suitably is also contained in this invention.
- the bellows structure of the sixth embodiment and the discharge trigger of the seventh embodiment may be applied to the discharge elements according to other embodiments.
- all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on the above-described embodiments are all included in the present invention.
- the discharge element and the manufacturing method thereof according to the present invention are suitable for application to a discharge element attached to a communication device or the like.
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Abstract
Description
図1は、本発明の実施の形態1に係る放電素子の模式的な斜視図である。図2は、図1に示す放電素子の模式的な一部断面図である。図1、2に示すように、放電素子100は、基台10と、第1電極20と、第2電極30とを備えている。
はじめに、図4に示すように、基台10と、第1電極20と、第2電極30とを組み立てる。なお、この時点では、第1電極20には、ガス導入部24の封止部24bが形成されておらず、かつ変形部25が形成されていない。
図6は、本発明の実施の形態2に係る放電素子の模式的な斜視図である。図7は、図6に示す放電素子の模式的な一部断面図である。図6、7に示すように、放電素子200は、基台10と、第1電極20Aと、第2電極30とを備えている。基台10と第2電極30とは、実施の形態1の放電素子100の対応する要素と同じであるので、以下では第1電極20Aについて具体的に説明する。
図8は、本発明の実施の形態3に係る放電素子の模式的な斜視図である。図8に示すように、放電素子300は、基台10Aと、第1電極20Bと、第2電極30とを備えている。第2電極30は、実施の形態1の放電素子100の対応する要素と同じであるので、以下では基台10Aと第1電極20Aとについて具体的に説明する。
つぎに、本発明の実施の形態4に係る放電素子について説明する。本実施の形態4に係る放電素子は、円管状の第1電極の一端部を押し潰して気密封止し、気密空間を形成したものである。
つぎに、本発明の実施の形態5に係る放電素子について説明する。本実施の形態5に係る放電素子は、第2電極にガス導入部が形成されている。
つぎに、本発明の実施の形態6に係る放電素子について説明する。本実施の形態6に係る放電素子は、第1電極が蛇腹構造を有している。
つぎに、本発明の実施の形態7に係る放電素子について説明する。本実施の形態7に係る放電素子は、放電トリガを備えるものである。
つぎに、本発明の実施の形態8に係る放電素子について説明する。本実施の形態8に係る放電素子は、第1電極と基台との間に間隙を設け、これをガス導入路とするものである。
11 下部
12 上部
13、13B、13C 孔
14 切欠
20、20A、20B、20C、20D、20E、20F 第1電極
21 内部空間
22、22A、32a 開口
23、31、31A 端子
23a、24a、31a ガス導入路
23b、24b、28、31b 封止部
24 ガス導入部
25 変形部
26 溝
27 フランジ部
29 蛇腹構造
29a 山部
29b 谷部
30、30A 第2電極
32、32A 放電部
40 放電トリガ
100~800、800A、800B 放電素子
B 接合材
g 放電開始電圧調整用ガス
G1~G5 スパークギャップ
G10、G11 間隙
L 距離
S 放電電流
S101~S104 ステップ
Claims (16)
- 塑性変形が可能な導電性の材料からなり、内部空間と、前記内部空間に連通する開口とを有する第1電極と、
絶縁性材料からなり、前記第1電極の前記内部空間が気密空間になるように前記開口に気密接合される基台と、
導電性の材料からなり、前記基台を介して前記内部空間に挿通され、前記第1電極との間にスパークギャップを形成する第2電極と、
を備えることを特徴とする放電素子。 - 前記第1電極は、前記第2電極に向けて前記内部空間へ突出した変形部を有することを特徴とする請求項1に記載の放電素子。
- 前記第1電極は、前記スパークギャップの大きさを調整するための蛇腹構造を有することを特徴とする請求項1に記載の放電素子。
- 前記第1電極の前記内部空間に放電開始電圧調整用ガスが充填されていることを特徴とする請求項1に記載の放電素子。
- 前記第1電極は、一端が前記内部空間に連通し、他の一端が気密封止されたガス導入路を有することを特徴とする請求項1に記載の放電素子。
- 前記第2電極は、一端が前記内部空間に連通し、他の一端が気密封止されたガス導入路を有することを特徴とする請求項1に記載の放電素子。
- 前記第1電極と前記基台との間に空隙が形成されており、前記空隙は接合材によって気密に塞がれていることを特徴とする請求項1に記載の放電素子。
- 前記第2電極と前記基台との間に空隙が形成されており、前記空隙は接合材によって気密に塞がれていることを特徴とする請求項1に記載の放電素子。
- 前記第1電極と前記第2電極との間に配置された放電トリガを備えることを特徴とする請求項1に記載の放電素子。
- 塑性変形が可能な導電性の材料からなり、内部空間と前記内部空間に連通する開口とを有する第1電極と、絶縁性材料からなる基台と、導電性の材料からなる第2電極とを準備し、前記第1電極の前記開口に、前記内部空間が気密空間になるように前記基板が気密接合され、かつ前記基台を介して前記内部空間に前記第2電極が挿通されて前記第1電極と前記第2電極との間にスパークギャップが形成されるように組み立てることを特徴とする放電素子の製造方法。
- 前記第1電極を変形して、前記スパークギャップの大きさを調整する工程をさらに含むことを特徴とする請求項10に記載の放電素子の製造方法。
- ガス導入路を介して前記第1電極の前記内部空間に放電開始電圧調整用ガスを導入して充填する工程と、
前記ガス導入路を気密封止する工程とをさらに含み、
前記気密封止する工程の後、前記スパークギャップの大きさを調整する工程を行うことを特徴とする請求項11に記載の放電素子の製造方法。 - 前記第1電極が有する前記ガス導入路から前記放電開始電圧調整用ガスを導入することを特徴とする請求項12に記載の放電素子の製造方法。
- 前記第2電極が有する前記ガス導入路から前記放電開始電圧調整用ガスを導入することを特徴とする請求項12に記載の放電素子の製造方法。
- 前記第1電極と前記基台との間の空隙を前記ガス導入路として前記放電開始電圧調整用ガスを導入することを特徴とする請求項12に記載の放電素子の製造方法。
- 前記第2電極と前記基台との間の空隙を前記ガス導入路として前記放電開始電圧調整用ガスを導入することを特徴とする請求項12に記載の放電素子の製造方法。
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US13/824,067 US8963409B2 (en) | 2011-02-02 | 2011-02-02 | Discharge element and method of manufacturing the same |
PCT/JP2011/052171 WO2012105014A1 (ja) | 2011-02-02 | 2011-02-02 | 放電素子およびその製造方法 |
CN201180002306.5A CN102804525B (zh) | 2011-02-02 | 2011-02-02 | 放电元件及其制造方法 |
KR1020137006925A KR101427125B1 (ko) | 2011-02-02 | 2011-02-02 | 방전소자 및 그 제조방법 |
JP2011532404A JP5010052B1 (ja) | 2011-02-02 | 2011-02-02 | 放電素子およびその製造方法 |
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JP2002260813A (ja) * | 2001-02-28 | 2002-09-13 | Mitsubishi Materials Corp | サージアブソーバ |
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US4658324A (en) | 1983-03-23 | 1987-04-14 | Okaya Electric Industries Co., Ltd. | Surge absorbing device |
EP0242688B1 (de) * | 1986-04-22 | 1990-07-18 | Siemens Aktiengesellschaft | Überspannungsableiter |
FR2636167B1 (fr) * | 1988-09-08 | 1990-11-16 | Citel Cie Indle Tubes Lampes E | Parafoudre a gaz contenant un additif mineral |
EP0361357B1 (en) | 1988-09-27 | 1996-12-18 | Yazaki Corporation | Discharge lamp |
US5331249A (en) | 1988-09-27 | 1994-07-19 | Yazaki Corporation | Discharge tube |
DE3835921C2 (de) * | 1988-10-18 | 1996-10-02 | Siemens Ag | Überspannungsableiter mit Luftfunkenstrecke |
JPH0785840A (ja) * | 1993-09-20 | 1995-03-31 | Yazaki Corp | ガス入り放電管 |
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JP2005018996A (ja) | 2003-06-23 | 2005-01-20 | Kondo Denki:Kk | サージ吸収素子及びその製造方法 |
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2011
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- 2011-02-02 CN CN201180002306.5A patent/CN102804525B/zh not_active Expired - Fee Related
- 2011-02-02 WO PCT/JP2011/052171 patent/WO2012105014A1/ja active Application Filing
- 2011-02-02 JP JP2011532404A patent/JP5010052B1/ja active Active
- 2011-02-02 KR KR1020137006925A patent/KR101427125B1/ko active IP Right Grant
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JPS59159885U (ja) * | 1983-04-13 | 1984-10-26 | 日本電信電話株式会社 | 多極避雷管 |
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JP2002260813A (ja) * | 2001-02-28 | 2002-09-13 | Mitsubishi Materials Corp | サージアブソーバ |
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JP5010052B1 (ja) | 2012-08-29 |
JPWO2012105014A1 (ja) | 2014-07-03 |
CN102804525A (zh) | 2012-11-28 |
US8963409B2 (en) | 2015-02-24 |
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