WO2021085339A1 - Résistance de prévention de bruit et son procédé de fabrication - Google Patents

Résistance de prévention de bruit et son procédé de fabrication Download PDF

Info

Publication number
WO2021085339A1
WO2021085339A1 PCT/JP2020/039983 JP2020039983W WO2021085339A1 WO 2021085339 A1 WO2021085339 A1 WO 2021085339A1 JP 2020039983 W JP2020039983 W JP 2020039983W WO 2021085339 A1 WO2021085339 A1 WO 2021085339A1
Authority
WO
WIPO (PCT)
Prior art keywords
electromagnetic shield
shield member
resistance element
noise prevention
resonance
Prior art date
Application number
PCT/JP2020/039983
Other languages
English (en)
Japanese (ja)
Inventor
瑞記 内盛
仁男 宮坂
Original Assignee
Koa株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koa株式会社 filed Critical Koa株式会社
Publication of WO2021085339A1 publication Critical patent/WO2021085339A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
    • H01C3/20—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding wound on cylindrical or prismatic base

Definitions

  • the present invention relates to a noise prevention resistor mounted on an ignition coil of an internal combustion engine such as an engine and a method for manufacturing the same.
  • the engine ignition device of a gasoline engine car ignites by passing a high-pressure current through the spark plug (spark plug) to discharge it, and sparking a compressed mixed gas of gasoline and air in the cylinder.
  • spark plug spark plug
  • spark plug In order to blow sparks by electric discharge, it is necessary to apply a voltage of 10 kV or more to the spark plug. Therefore, gasoline engine vehicles are equipped with an ignition coil that boosts the battery voltage.
  • the ignition coil is composed of a coil main body, a tubular insulating case, etc., and the coil main body is a primary coil housed in the insulating case, a secondary coil, a core (iron core) around which these coils are wound, and the like. It consists of an IC chip or the like that controls ignition.
  • a spring (connection terminal on the spark plug side) connected to the spark plug is housed in the tubular insulating case.
  • the inside of the coil body is filled with resin and sealed.
  • a noise prevention resistor (also called a noise prevention filter) is arranged in a tower portion between the coil body and the spring, and the noise is generated.
  • the coil body and the spark plug are electrically connected via a prevention resistor.
  • the high-voltage electric wire device described in Patent Document 1 has a columnar shape in which ferrite powder is mixed with silicone rubber or the like between the spark plug connection terminal and the output side terminal of the high-voltage cable. It discloses a technique for suppressing the emission of high-frequency noise by incorporating a resistor (concentrated resistor) formed by winding a metal resistance electric wire into an extrusion-molded magnetic powder-containing resin core.
  • a resistor concentrated resistor
  • noise is suppressed by the characteristics depending on the resistance value and the inductance value of the resistance wire (resistance wire) used, and the axial length dimension of the resistor body including the resistance element is lengthened. It is possible to improve the noise suppression effect by changing the diameter of the core material and the resistance wire.
  • the mounting space for the noise prevention resistor is limited in the engine ignition device, and mounting the noise prevention resistor with different lengths and dimensions requires a change in the mounting structure of the engine ignition device. Therefore, there is a problem that it is difficult to enhance the noise suppression effect while maintaining the outer size of the noise prevention resistor.
  • the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to improve the noise suppression effect in a single noise suppression resistor without changing the axial length or the like. is there.
  • the present invention is a noise prevention resistor having an insulating core material and a resistance element in which a resistance wire is wound around the outer peripheral surface of the core material, and a pair of cap terminals are attached to both ends of the resistance element.
  • the electromagnetic shield member is formed so as to circulate around the axis of the resistance element at a predetermined position which is a part of the outer peripheral surface of the resistance element and is separated from the pair of cap terminals.
  • the predetermined position is a position deviated from the axial intermediate point of the resistance element.
  • it is characterized in that two resonance equivalent circuits having different resonance frequencies are formed with the single electromagnetic shield member formed at a predetermined position as a boundary.
  • the predetermined position is characterized in that the coupling coefficient between the inductance component of one of the two resonance equivalent circuits and the inductance component of the other resonance equivalent circuit is reduced.
  • a plurality of the predetermined positions are provided, and a plurality of resonance equivalent circuits having different resonance frequencies are formed with each of the electromagnetic shield members formed at each of the plurality of positions as a boundary.
  • the electromagnetic shield member is characterized in that it is formed at a position where the coupling coefficient between the inductance components of adjacent resonance equivalent circuits among the plurality of resonance equivalent circuits is reduced.
  • the resonance equivalent circuit is an LCR resonance circuit formed by a resistance component, an inductance component, and a capacitance component of the resistance element magnetically separated with the electromagnetic shield member as a boundary.
  • the electromagnetic shield member is characterized by being made of an annular metal.
  • the electromagnetic shield member is characterized by being a metal film formed on the surface of a heat-resistant resin layer. Further, for example, the electromagnetic shield member and the resistance wire are electrically insulated from each other.
  • the method for manufacturing the noise prevention resistor of the present invention includes a step of bundling fibrous insulators to form a long core material, and a step of winding a resistance wire around the outer peripheral surface of the core material.
  • the present invention comprises a step of mounting a pair of cap terminals at both ends in the axial direction of the resistance element, and mounting the electromagnetic shield member at a predetermined position separated from the pair of cap terminals.
  • the step of forming the electromagnetic shield member is carried out after the step of mounting the cap terminal.
  • at least one electromagnetic shield member is formed at a position deviated from the axial intermediate point of the resistance element.
  • the electromagnetic shield member is formed at each of a plurality of positions in the axial direction of the resistance element.
  • an electromagnetic shield member that covers a part of the outer peripheral surface of the resistance element in an annular shape around the axis, a plurality of resonance circuits having different resonance frequencies are formed in a single noise suppression resistor. , Noise suppression is possible in a wide band.
  • FIG. 1 (a) is an external perspective view of the noise prevention resistor according to the embodiment of the present invention
  • FIG. 1 (b) shows the resistor cut along the line of sight of XX'in FIG. 1 (a). It is a vertical sectional view.
  • FIG. 2A is an external perspective view of a noise prevention resistor in which an electromagnetic shield member is fixed to a resistance element by caulking
  • FIG. 2B is along the line of sight of YY'in FIG. 2A. It is a vertical cross-sectional view which cut the resistor.
  • It is external perspective view of the noise prevention resistor which concerns on another example which fixed the electromagnetic shield member by caulking.
  • It is external perspective view of the noise prevention resistor which concerns on further another example which fixed the electromagnetic shield member by caulking.
  • FIG. 1 It is a schematic diagram for demonstrating the separation mechanism of a resonance circuit by an electromagnetic shield member. It is a figure which shows an example of the simple equivalent circuit of the resistor provided with the electromagnetic shield member. It is a graph (image) which showed the result which showed the electrical characteristic of a noise-prevention resistor. It is a figure which shows another example of the simple equivalent circuit of the resistor provided with the electromagnetic shield member. It is a flowchart which shows an example of the manufacturing process of the noise prevention resistor which concerns on embodiment in time series. It is a figure which shows another example concerning the structure of the electromagnetic shield member. It is a figure which shows another example about the shape of the electromagnetic shield member. It is a figure which shows another example concerning the formation mode of the electromagnetic shield member to a resistance element. FIG.
  • FIG. 13 (a) is an external perspective view of the noise prevention resistor according to the modified example 5, and FIG. 13 (b) shows the resistor in the axial direction along the ZZ'arrow line of sight of FIG. 13 (a). It is a vertical cross-sectional view when it is cut into.
  • FIG. 1A is an external perspective view of a noise prevention resistor (hereinafter, also simply referred to as a resistor) 10 according to the present embodiment
  • FIG. 1B is an external perspective view of FIG. 1A. It is a vertical cross-sectional view when the resistor is cut in the axial direction along the arrow line of sight.
  • the resistor 10 is, for example, a noise prevention resistor mounted on an engine ignition device and functioning as a noise filter that effectively suppresses radiated noise such as ignition noise generated at the time of engine ignition.
  • the resistor 10 is attached to the core material 5, the resistance element (resistor) 2 in which the resistance wire 7 is wound around the outer peripheral surface of the core material 5, and both ends of the resistance element 2, and is electrically connected to the resistance wire 7.
  • the cap terminals 3a and 3b are provided, and an electromagnetic shield member (also referred to as a ring-shaped member) 8a formed at a position where a part of the outer peripheral surface of the resistance element 2 is rotated around an axis and does not come into contact with the cap terminal.
  • the core material 5 is a rod-shaped (cylindrical) member in which a large number of fibrous insulating materials made of glass, ferrite, resin, etc. are bound and fixed with epoxy resin, silicone resin, or the like.
  • the fiber diameter is several ⁇ m to several tens of ⁇ m, so if a bundle of a plurality of fibers is conveyed in a long state before cutting, the shape of the core material cannot be maintained and the glass fiber is curved. Therefore, as described above, the core material is impregnated with an epoxy resin, a silicone resin, or the like and heat-cured to maintain its shape.
  • the present invention is not limited to this, and for example, it does not have to be a fibrous insulator, and glass, ferrite, resin, or ceramic. You may use a member formed into a cylindrical shape such as.
  • the resistance wire 7 is, for example, a metal wire such as nickel / iron (Ni—Fe) wire, nickel (Ni) wire, copper / nickel (CN) wire, nickel / chromium (Ni—Cr) wire, and the resistance of the resistor. Select according to the value.
  • the wire diameter of the resistance wire 7 is about several tens of ⁇ m (for example, 30 to 60 ⁇ m), and the resistance wire 7 is continuously wound around the outer circumference of the core material 5 at a narrow pitch.
  • the metal wire may be used as it is, or a coated conductor wire having a resin coating on the surface of the metal wire may be used.
  • An insulating coating (also referred to as a resin coating) 6 made of resin is formed on the outer peripheral surface of the resistance element 2.
  • a resin coating 6 made of resin is applied and coated on the outer peripheral surface of the core material 5 around which the resistance wire 7 is wound.
  • the insulating coating 6 has a role of preventing unwinding of resistance wires and short-circuiting between resistance wires.
  • the resin coating as the insulating coating 6 has a role of fixing the resistance wire 7 as described above, but if the thickness thereof varies, the cap terminals 3a and 3b are press-fitted into the end portions of the outer peripheral surface of the resistance element 2. At that time, it is assumed that the insulating coating 6 is scraped by the openings 4a and 4b of the cap terminal. Therefore, the insulating coating 6 is thick enough to hide the resistance wire 7, for example.
  • the cap terminals 3a and 3b are made of a conductive metal such as iron or stainless steel, and the surface thereof is plated with copper, nickel or the like. As a result, the cap terminals 3a and 3b come into contact with the resistance wire 7 to ensure an electrical connection.
  • the cap terminals 3a and 3b have openings 4a and 4b and are formed in a bottomed tubular shape as a whole.
  • the cap terminals 3a and 3b are manufactured by, for example, deforming a metal plate material by a punch.
  • the cap terminals 3a and 3b are fixed by mechanically pushing (press-fitting) the cap terminals 3a and 3b in the axial direction with the openings 4a and 4b facing the axial ends of the resistance element 2. Even if the outer surface side portion is caulked in order to ensure the continuity between the cap terminals 3a and 3b and the resistance element 2 (resistance wire 7) and further to prevent the cap terminals 3a and 3b from coming off. Good.
  • the electromagnetic shield member 8a is a ring-shaped member having conductivity and low resistivity, for example, made of silver, copper, aluminum, iron, or the like. As shown in FIG. 1A, the electromagnetic shield member 8a covers a part of the outer peripheral surface of the resistance element 2 in which the resistance wire 7 is wound around the core material 5 in an annular shape without interruption around the axis thereof.
  • the electromagnetic shield member 8a is fixed to the resistance element 2 with a heat-resistant resin, an adhesive, or the like in order to prevent dropping, misalignment, and the like.
  • the resistance wire 7 and the electromagnetic shield member 8a are sufficiently electrically insulated in order to avoid a change in resistance value (lower resistance) due to the electromagnetic shield member 8a and an arc discharge between the resistance wire 7 and the electromagnetic shield 8a. It is desirable to be.
  • an insulating layer (resin) is interposed between the resistance wire 7 and the electromagnetic shield member 8a, or the inside of the electromagnetic shield member 8a is insulated to insulate.
  • FIG. 2A is an external perspective view of the noise prevention resistor 20 to which the electromagnetic shield member 8b is fixed by caulking
  • FIG. 2B is taken along the line of sight of YY'in FIG. 2A. It is a vertical cross-sectional view when the noise prevention resistor 20 is cut in the axial direction.
  • the noise prevention resistor 60 shown in FIG. 3 is caulked in a direction parallel to the axial direction of the resistance element 2 with respect to the electromagnetic shield member 8f.
  • the noise prevention resistor 70 shown in FIG. 4 has a structure in which the electromagnetic shield member 8g is caulked in a direction parallel to the axial direction of the resistance element 2, and the cap terminals 33a and 33b are also caulked.
  • the part that is not crimped may be deformed (warped) if it is strongly crimped. Therefore, like the electromagnetic shield member 8f of the noise prevention resistor 60 shown in FIG. 3, caulking is performed over the entire width direction, or the electromagnetic shield member 8g of the noise prevention resistor 70 shown in FIG. 4 is used. Squeeze at least the end in its width direction.
  • the warp of the electromagnetic shield member due to caulking can be reduced, and the entire electromagnetic shield member is in close contact with the resistance wire. As a result, it is possible to obtain the effect that arc discharge is unlikely to occur between the resistance wire and the electromagnetic shield member.
  • the electromagnetic shield member 8 g can be crimped and the cap terminals 33a and 33b can be crimped at the same time. Therefore, in addition to the above effects, the resistor can be manufactured. The process can be simplified.
  • the resistance element 2 such as the noise prevention resistors 10 and 20 according to the present embodiment has an annular shape that orbits the surface of the resistance element at a position not in contact with the cap terminals 3a and 3b mounted on both ends thereof.
  • Electromagnetic shield members 8a and 8b are arranged.
  • FIG. 5 is a schematic diagram for explaining the separation action (separation mechanism) of the resonance circuit by the electromagnetic shield members 8a and 8b.
  • the resonance circuit is separated by the electromagnetic shield members 8a and 8b described above.
  • a resonance circuit (referred to as RC1) corresponding to the part A and a resonance circuit (referred to as RC2) corresponding to the part B are formed.
  • FIG. 6 is an example of a simple equivalent circuit of resistors 10, 20, etc. provided with electromagnetic shield members 8a, 8b, etc.
  • the simple equivalent circuit 30 such as resistors 10 and 20 is a circuit in which resonance circuits RC1 and RC2 are connected in series.
  • the resistance component and the inductance component which depend on the number of turns of the resistance wire, the resistance wire material, etc., are electrically connected in series, and the stray capacitance generated between the resistance wires (between conductors) is generated. It is an LCR resonant circuit that becomes a capacitance component and is connected in parallel to these resistance components and inductance components.
  • the resistance wire 7 is uniformly wound from one end to the other end of the core material 5, and the electromagnetic shield members 8a and 8b are the shafts of the resistance element 2.
  • the number of turns of the resistance wire at the part A in FIG. 5 (N 1 ) and the number of turns of the resistance wire at the part B (N 2 ) are equal. Therefore, in the resonance circuits RC1 and RC2, the inductance components L1 and L2, the resistance components R1 and R2, and the capacitance components C1 and C2 can be regarded as being equal (equivalent), respectively.
  • the resonance circuits RC1 and RC2 have the same resonance characteristics, and the resistors 10, 20 and the like have deep resonance peaks due to the synergistic effect of the resonance characteristics of the resonance circuit RC1 and the resonance characteristics of the resonance circuit RC2. Has characteristics. As a result, a resonance peak is generated for a specific frequency, and the resonance peak cannot have a width.
  • a resistor with a high resistance value and a large inductance component has a large noise suppression effect, but when mounted on an engine ignition device as a noise prevention resistor, the resistance value is high and the ignition coil is lost. There is a problem that the engine output is reduced due to the increase in the engine output. Therefore, in an engine ignition device, a resistor having a low resistance value and a large inductance component is required.
  • the noise prevention resistor is provided with a width at the resonance peak in a desired frequency band while securing the above-mentioned inductance components L1 and L2. It is necessary to function as a noise filter.
  • the magnetic fluxes of the portions A and B separated by the electromagnetic shield members 8a and 8b do not match (the coupling of the inductance components L1 and L2 in FIG. 6).
  • the electromagnetic shield members 8a and 8b are arranged at predetermined positions (coefficient (M) approaches 0). That is, the electromagnetic shield members 8a and 8b are arranged and formed at positions deviated from the midpoint in the axial direction of the resistance element 2 and not touching the cap terminals 3a and 3b.
  • the first resonance equivalent circuit (RC1) is formed at the portion of the resistance element 2 between the electromagnetic shield members 8a and 8b and one of the cap terminals 3a of the pair of cap terminals, and further.
  • a second resonance equivalent circuit (RC2) is formed at a portion between the electromagnetic shield members 8a and 8b and the other cap terminal 3b of the pair of cap terminals, and the first resonance equivalent circuit and the second resonance equivalent circuit are formed.
  • the resonance frequency of the circuit is different.
  • the resonance peak of the resistor has a width. This is a characteristic of a phenomenon (double resonance phenomenon) in which a plurality of valleys of resonance frequencies (peaks) are formed by arranging a plurality of resonance circuits in close proximity to each other, and the width of the resonance point is widened.
  • FIG. 7 is a graph imagining the result of the electrical characteristics of the noise prevention resistor according to the present embodiment.
  • the horizontal axis of FIG. 7 is the frequency (MHz), and the vertical axis is the S21 characteristic (dB).
  • the S21 characteristic is an S parameter indicating the amount of attenuation of the signal that has passed through the noise suppression resistor.
  • an annular electromagnetic shield member orbiting the outer peripheral surface thereof is arranged at a position deviated from the axial intermediate point of the resistance element. Since the peak of the resonance point has a width, it can be seen that it has better filter characteristics (noise suppression effect) as compared with the conventional example.
  • the noise prevention resistors 10, 20, etc. are shown in FIG. It can be represented by a simple equivalent circuit.
  • L is an inductance component and k is a magnetic coupling coefficient.
  • FIG. 9 is a flowchart showing an example of the manufacturing process of the noise prevention resistor according to the present embodiment in chronological order.
  • the core material is molded in the first step (step S11 in FIG. 9).
  • glass fibers having a fiber diameter of several ⁇ m to several tens of ⁇ m are bundled, impregnated with an epoxy resin, a silicone resin, or the like, and formed into a long rod shape to form a core material.
  • step S13 resistance wires such as nickel / iron (Ni—Fe) wire, nickel (Ni) wire, copper / nickel (CN) wire, nickel / chromium (Ni—Cr) wire, etc. are formed on the outer peripheral surface of the core material. Wind continuously at a predetermined pitch. The resistance value of the resistor is adjusted according to the type (material) of the wire, the winding pitch, and the like.
  • step S15 the core material around which the resistance wire is wound is dried to cure the resin.
  • step S17 for example, an epoxy resin or a silicone resin having a thickness sufficient to hide the resistance wire is applied and coated on the outer peripheral surface of the core material obtained by winding the resistance wire and drying / curing as described above.
  • step S19 the resin coating is cured.
  • the drying and curing of step S15 may be performed at the same time in step S19.
  • step S21 the resistance wire is wound in the above step, and the long core material coated with the resin is cut together with the resistance wire to a predetermined size by a cutter or the like. As a result, individual pieces of the resistance element 2 (resistor) are manufactured.
  • the electromagnetic shield is placed at a predetermined position (position shifted from the axial center of the resistance element) so as to cover a part of the outer peripheral surface of the resistance element around which the resistance wire is wound without interruption around the axis. Form a member.
  • the electromagnetic shield member is, for example, a plate-shaped annular member having a width of 1 to 3 mm and a thickness of 0.1 to 0.6 mm in consideration of workability and the like.
  • the electromagnetic shield member may be composed of a linear thin metal wire from the viewpoint that the short-circuit current described above can be passed.
  • a thin metal wire is used, the ends of the thin metal wire are joined by welding or the like to form an annular ring-shaped member.
  • cap terminals 3a and 3b are attached to both ends of the resistance element 2.
  • the cap terminals 3a and 3b are mechanically pushed in the axial direction from both ends of the resistance element 2 to be temporarily fixed, and then the side surface portions of the cap terminals 3a and 3b are pressed from the outer peripheral surface thereof to be deformed (caulking). ), That makes the resistance wire 7 and the cap terminals 3a and 3b electrically conductive.
  • the cap terminals 3a and 3b may be press-fitted into both ends of the resistance element 2 to be mounted (fitted).
  • step S27 an inspection such as an appearance image inspection and a resistance value inspection of the noise prevention resistor manufactured through the above steps is performed.
  • the order of the step of forming the electromagnetic shield member in step S23 and the step of mounting the cap terminal in step S25 may be appropriately changed according to the shape, structure, etc. of the electromagnetic shield member to be formed, and the same step. May be performed at the same time.
  • the step of forming the electromagnetic shield member in step S23 is performed after the step of mounting the cap terminal in step S25, the position deviated from the axial intermediate point of the resistance element forming the electromagnetic shield member, that is, separated from the pair of cap terminals.
  • the predetermined position can be easily adjusted.
  • the curing method of the resin or the like in step S15 or the like described above may be any of curing at room temperature, heat curing (for example, 100 to 150 ° C.), or curing by ultraviolet irradiation. Further, from the viewpoint of shortening the drying time, the resin of the protective film formed on the entire outer surface of the resistor may be limited to the quick-drying urethane resin.
  • an electromagnetic shield member that covers a part of the outer peripheral surface of the resistance element without interruption is arranged around the axis thereof, and the resistance is resisted by the electromagnetic shield member. Separate the resonant circuit of the vessel (magnetically separate).
  • the electromagnetic shield member in a single resistor, by forming the electromagnetic shield member at a position where the resonance frequency of the resonance circuit is different, a plurality of resonance circuits are provided in one element of the resistor, and the resonance of the resistor is generated.
  • the peak has a width.
  • the noise suppression effect is achieved in a wide band while maintaining the external size of the noise prevention resistor without increasing the axial length of the resistor body or changing the diameter of the core material and the resistance wire. It is possible to obtain a noise suppression resistor having a function as a noise suppression filter.
  • the electromagnetic shield member is arranged so as to be offset from the axial center of the resistance element so that the resonance frequency is different with the electromagnetic shield member as a boundary.
  • the electromagnetic shield member is arranged so as to be offset from the axial center of the resistance element so that the resonance frequency is different with the electromagnetic shield member as a boundary.
  • a single electromagnetic shield member is formed on the resistance element, but a plurality of electromagnetic shield members are formed on the resistance element, and the resonance circuit of the resistor is divided at each electromagnetic shield member to divide the resonance frequency.
  • a first resonant circuit is formed, a second resonant circuit is formed at a portion between the two electromagnetic shield members, the other cap terminal 3b of the pair of cap terminals and the other of the two electromagnetic shield members.
  • a third resonance circuit is formed at a portion between the cap terminal 3b and the electromagnetic shield member adjacent to the cap terminal 3b, and the resonance frequencies of each of these three resonance circuits are different.
  • a metal member having an integral structure with continuous rings is used as the electromagnetic shield member, but the present invention is not limited to this.
  • the electromagnetic shield member 8c shown in FIG. 10 a part of the ring is formed into a separated shape, the separated portion C is formed into a structure having a step so that it can be engaged, and after being formed into a resistance element, they are formed. It may be configured to be joined.
  • the separated portions C are joined to each other by soldering, welding, or the like.
  • the electromagnetic shield member can be formed so as to cover a part of the outer peripheral portion of the resistance element without interruption.
  • the separated portions C of the electromagnetic shield member 8c may have a structure that simply fits into each other.
  • the shape of the electromagnetic shield member is not limited to the example shown in FIG. 1 and the like, and may be a ring-shaped member having a polygonal appearance, such as the electromagnetic shield member 8d shown in FIG.
  • the mode of forming the electromagnetic shield member on the resistance element is not limited to the above embodiment.
  • an insulating layer (resin layer) 31 is formed in an annular shape at a predetermined position on the outer peripheral surface of the resistance element 2 so as not to come into contact with the cap terminals 3a and 3b.
  • An electromagnetic shield member 8e made of a metal film may be formed on the upper surface of the insulating layer (resin layer) 31.
  • the insulating layer (resin layer) 31 is formed by printing, coating, shrinking of a heat-bonded tube, or the like. Alternatively, an insulating coating (resin coating) may be used.
  • the electromagnetic shield member 8e which is a metal film, is formed by printing, coating, pasting, transfer, or the like. As the resin used for the insulating layer 31, a highly heat-resistant resin is used. As a result, the insulating layer 31 has resistance to firing and curing of the metal film (electromagnetic shield member 8e).
  • FIG. 13 (a) is an external perspective view of the noise prevention resistor 80 according to the modified example 5, and FIG. 13 (b) is an axis of the resistor along the ZZ'arrow line of sight of FIG. 13 (a). It is a vertical cross-sectional view when cut in a direction.
  • the noise prevention resistor 80 of the cap terminals 43a and 43b, the cap terminal 43a is separated from the resistance wire 7 at the opening 45a, and the opening of the electromagnetic shield member 8g is opened.
  • It has a structure in which an expansion portion 45b is provided at an end portion on the side facing the portion 45a so as to be separated from the resistance wire 7.
  • the resonance frequencies of the two resonance equivalent circuits formed across the electromagnetic shield member 8g can be made different.
  • the sealing resin enters the inside of the expansion portion, so that arc discharge is less likely to occur.

Abstract

L'invention concerne une résistance de prévention de bruit 10, un élément de blindage électromagnétique 8a, qui recouvre une partie de la surface périphérique externe d'un élément de résistance 2 sans interruption autour de l'axe de l'élément de résistance 2, est disposé au niveau d'une position sur la surface périphérique externe de l'élément de résistance 2 où la fréquence de résonance d'un circuit de résonance est différente. Ainsi, l'élément de blindage électromagnétique 8a sépare magnétiquement le circuit de résonance d'une résistance. Il en résulte, qu'étant donné qu'une pluralité de circuits équivalents de résonance sont disposés dans un élément de résistance unique et que le pic de résonance de la résistance a une largeur, le bruit peut être supprimé dans une bande plus large qu'avant tout en maintenant la dimension de longueur et similaire.
PCT/JP2020/039983 2019-10-31 2020-10-23 Résistance de prévention de bruit et son procédé de fabrication WO2021085339A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019198328A JP2021072371A (ja) 2019-10-31 2019-10-31 雑音防止抵抗器およびその製造方法
JP2019-198328 2019-10-31

Publications (1)

Publication Number Publication Date
WO2021085339A1 true WO2021085339A1 (fr) 2021-05-06

Family

ID=75713455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/039983 WO2021085339A1 (fr) 2019-10-31 2020-10-23 Résistance de prévention de bruit et son procédé de fabrication

Country Status (2)

Country Link
JP (1) JP2021072371A (fr)
WO (1) WO2021085339A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5889901U (ja) * 1981-12-11 1983-06-17 株式会社アドバンテスト 防湿形固定抵抗器
JPH01130501U (fr) * 1988-02-29 1989-09-05
JP2013143417A (ja) * 2012-01-10 2013-07-22 Koa Corp 抵抗器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5889901U (ja) * 1981-12-11 1983-06-17 株式会社アドバンテスト 防湿形固定抵抗器
JPH01130501U (fr) * 1988-02-29 1989-09-05
JP2013143417A (ja) * 2012-01-10 2013-07-22 Koa Corp 抵抗器

Also Published As

Publication number Publication date
JP2021072371A (ja) 2021-05-06

Similar Documents

Publication Publication Date Title
JP5108892B2 (ja) 高周波プラズマ生成装置
CN111933388B (zh) 线圈部件
US7915795B2 (en) Sparkplug for an internal combustion engine
JP2010507206A5 (fr)
US6437674B1 (en) Ignition apparatus having built-in noise suppression
JP3777962B2 (ja) 電磁装置及び高電圧発生装置
US20080141987A1 (en) Ignition coil with wire rope core and method
WO2021085339A1 (fr) Résistance de prévention de bruit et son procédé de fabrication
US3273099A (en) Transformer
US4590536A (en) Resistive-capacitive igniter and cable
KR100225220B1 (ko) 고주파장치(mico wave device)
US4456900A (en) High frequency coil
US2467531A (en) Ignition system and spark plug
JP4590699B2 (ja) 点火コイル装置
JPH09129458A (ja) コイル部品
JP4004782B2 (ja) 巻線抵抗器およびその製造方法
KR20120116365A (ko) 점화 시스템
JP4506078B2 (ja) 電磁装置および高電圧発生装置
JP6397687B2 (ja) 交流点火装置
CN109215942B (zh) 电感元件及lc滤波器
US2292809A (en) Induction apparatus
JP6503949B2 (ja) 内燃機関用の点火コイル及び点火装置
JP2004111451A (ja) 電磁装置、巻設方法および高電圧発生装置
WO2020095683A1 (fr) Résistance de prévention de bruit et son procédé de fabrication
JPH10112414A (ja) 点火コイル

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20880550

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20880550

Country of ref document: EP

Kind code of ref document: A1