JP2006310652A - Three-terminal electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-terminal electronic component which can be used for a wide band noise filter capable of removing noise in a wide band and can effectively and stably absorb a surge voltage. <P>SOLUTION: The three-terminal filter 2 is constituted by electrically connecting: at least a pair of a capacitor chip component 4a and varister chip component 4b which have a first end electrode and a second end electrode, respectively; a metal-frame first terminal 10 which has a curved portion 12 where a pair of first pawls 14 holding first end electrodes 6 of these chip components 4a, 4b are formed in its intermediate portion; a pair of magnetic cores 18a, 18b where through-holes 20 which a pair of legs 16 placed at both ends of the metal-frame first terminals penetrate are formed; and second end electrodes 8 of the chip components 4a, 4b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a three-terminal electronic component that can effectively and stably absorb a surge voltage and has a noise removing function in a wide frequency range. More specifically, the present invention is strong against vibration and is robust. The present invention relates to a three-terminal electronic component that can flow a large current, has high reliability, contributes to space saving, can operate even under severe temperature conditions, and is particularly suitable as a vehicle-mounted component.

  Conventionally, the structures of Patent Documents 1 and 2 below are known as this type of three-terminal electronic component.

  In the LC filter of Patent Document 1, both side portions of a plate conductor are inserted into a magnetic core, and a chip capacitor is connected to the central portion of the plate conductor. In this case, the upper surface of the LC filter is not a smooth surface, and there is no mechanical holding of the chip capacitor.

  The chip filter of Patent Document 2 is one in which a metal plate is inserted into a magnetic core and a chip capacitor is connected to the center of the metal plate. In this case, the upper surface of the chip filter is not a smooth surface, the chip capacitor is not mechanically held, and the electrode of the chip capacitor is used as it is as the bottom electrode.

  In these three-terminal electronic components of Patent Documents 1 and 2, when mounting on a circuit board using an electronic component mounting machine, the surface that is attracted by the suction nozzle of the electronic component mounting machine is a capacitor or main conductor (through a magnetic material). Plate-like conductor), the surface is not smooth and the reliability of adsorption is poor. In particular, when the surface to be sucked by the suction nozzle is a connection portion of the chip capacitor, the smoothness is low and the suction property at the time of mounting is poor.

  Furthermore, there is no mechanical holding of the members constituting the inductor and capacitor, and the mechanical strength after mounting on the board is inferior. Furthermore, since one electrode of the chip capacitor is directly mounted on the circuit board, the component may be damaged when reworked (removed from the board and reused).

  In order to solve such problems, the present applicant has developed a new three-terminal electronic component, filed an application earlier, and published an application (see Patent Document 3). The three-terminal electronic component shown in Patent Document 3 can solve the problems of Patent Documents 1 and 2.

  However, the three-terminal electronic component disclosed in Patent Document 3 has an excellent noise removal effect at a specific frequency, but a noise removal function in a wider band has been demanded. Further, the structure of the three-terminal electronic component shown in Patent Document 3 is a structure suitable for holding only a single chip component, and it is difficult to hold two or more chip components as it is. there were. Therefore, depending on the required electric circuit, it is necessary to connect and use a plurality of terminal-type electronic components, which is contrary to the demand for space saving.

Furthermore, when connecting the three-terminal electronic component shown in Patent Document 3 containing a capacitor chip to a power supply line, it is necessary to connect a varistor chip separately to absorb the surge voltage. . Therefore, depending on the circuit design, ground noise may be superimposed on the power supply line, and the noise may leak to the outside of the connector.
Japanese Utility Model Publication No. 1-86715 Japanese Utility Model Publication No. 4-46716 JP 2005-12719 A

  The present invention has been made in view of such a situation, and a first object thereof is to be strong against vibration, robust, and capable of flowing a large current, and is compact and reliable, under severe temperature conditions. However, it is possible to provide a three-terminal electronic component that is operable and particularly suitable as a vehicle-mounted component.

  The second object of the present invention can be used as a wideband noise filter capable of removing noise in a wide band by a single component, and can absorb a surge voltage effectively and stably. In addition, it is possible to provide a three-terminal electronic component that can save space and is less likely to superimpose ground noise on a power supply line.

In order to achieve the above object, a three-terminal electronic component according to the present invention includes:
At least a pair of capacitor chip parts and varistor chip parts each having a first end electrode and a second end electrode at both ends,
The first end electrodes of at least two or more of the chip components arranged side by side are electrically connected, and a pair of first claw portions for gripping these chip components from both sides in a direction approaching each other are formed. A metal frame first terminal having a curved portion at an intermediate portion and a pair of legs provided at both ends constituting a pair of external terminals;
A pair of magnetic cores formed with through holes through which a pair of the leg portions provided at both ends of the metal frame first terminal pass, respectively;
The second end electrodes of at least two or more of the chip components arranged side by side are electrically connected, and a pair of second claw portions are formed to grip these chip components from both sides in a direction approaching each other. A metal frame second terminal,
A cover member that integrally covers the upper part of the intermediate portion of the metal frame first terminal and the upper part of the pair of magnetic cores, and is formed with a gripping piece that grips the upper part of each magnetic core;
At least two or more of the chip components are arranged in a direction substantially perpendicular to the arrangement direction of the magnetic cores.

  In the three-terminal electronic component according to the present invention, the first end electrodes of the plurality of chip components are held together by the metal frame first terminal and are electrically connected. Further, the second end electrodes of these chip components are held together by the metal frame second terminal and are electrically connected. And the magnetic core is arrange | positioned in the direction substantially orthogonal to the arrangement direction of a chip component in the both ends of the metal frame 1st terminal. The magnetic core is firmly held by bending the leg portion of the metal frame first terminal after passing through the through hole of the magnetic core. The upper part of each magnetic core is gripped by the cover member, and the lower part of each magnetic core is gripped by the metal frame second terminal.

  Therefore, these chip parts, the metal frame first terminal, the pair of magnetic cores, the metal frame second terminal, and the cover member are firmly connected, with a plurality of chip parts as the center. As a result, the three-terminal electronic component according to the present invention is resistant to vibration and is robust.

  In addition, each leg portion of the metal frame first terminal penetrates the through hole of each magnetic core to form a pair of coil elements, and a plurality of chip components (capacitors and varistors) are arranged in parallel between the coil elements. A circuit to be connected can be realized by a single three-terminal electronic component. Moreover, since the pair of legs of the metal frame first terminal and the metal frame second terminal constitute three external terminals in the three-terminal electronic component, these terminals have a large current of 1 ampere or more. It becomes possible to flow.

  Further, the periphery of the plurality of chip components is covered with a metal frame first terminal, a pair of magnetic cores, a metal frame second terminal, and a cover member, and the plurality of chip components are magnetic cores. Are arranged in a direction substantially perpendicular to the arrangement direction. Therefore, the three-terminal electronic component of the present invention is compact and highly reliable. Therefore, the three-terminal electronic component of the present invention can operate even under severe temperature conditions, and is particularly suitable as a vehicle-mounted component.

  Furthermore, in the present invention, since a plurality of chip components (capacitors and varistors) are arranged in parallel in a single three-terminal electronic component, noise can be removed by a single component. It can be used as a simple noise filter and can absorb the surge voltage effectively and stably. Moreover, ground noise does not leak outside through the varistor. In addition, since the three-terminal electronic component of the present invention has a structure in which a plurality of chip components (capacitors and varistors) are arranged in parallel in a single three-terminal electronic component, space saving is achieved. Is also possible.

  Preferably, the capacitance of the capacitor chip component is larger than the capacitance of the varistor chip component. In general, the capacitance of a varistor chip component is extremely small compared to a capacitor chip component. If the capacitance is different, the frequency characteristics are also changed. A varistor having a low capacitance has a noise removal effect in a high frequency range, and a capacitor having a high capacitance has an excellent noise removal effect in a low frequency range. Therefore, by combining a varistor and a capacitor, it is possible to realize a filter element having an excellent noise removal effect in a wide band. Moreover, according to the present invention, the capacitor chip component and the varistor chip component can be incorporated into a single three-terminal electronic component, thereby realizing compactness, space saving and high reliability at the same time. can do.

  Preferably, the capacitance of the capacitor chip component is 10 times or more than the capacitance of the varistor chip component. By varying the capacitance within such a range, it is possible to easily realize a wide band.

  Preferably, the grip piece of the cover member is formed with a misalignment prevention claw for preventing the pair of magnetic cores from moving in a direction away from each other. By forming the misalignment prevention claw, the misalignment of the magnetic core can be suppressed.

  Preferably, the upper surface of the cover member is a smooth surface that can be sucked by a suction nozzle. By configuring with such a smooth surface, the suction holding by the suction nozzle of the electronic component mounting machine is ensured, and automatic mounting of the three-terminal electronic component on a circuit board or the like is facilitated.

  Preferably, the metal frame second terminal is formed with a position restricting piece that suppresses each magnetic core from being too close to the chip component. This position restricting piece can prevent the positional deviation of the magnetic core together with the above-described positional deviation preventing claw of the cover member.

  Preferably, each leg portion of the first metal frame terminal is bent in the direction of the second metal frame terminal after passing through the through hole of the magnetic core so that each magnetic core is integrated with the chip component. Configured

  The metal frame second terminal is formed with an insulating notch for suppressing the tip of each leg portion of the metal frame first terminal from coming into contact with the metal frame second terminal.

  Each leg portion in the metal frame first terminal penetrates the through hole of the magnetic core and then is bent in the direction of the metal frame second terminal, so that the integration of the metal frame first terminal and the magnetic core is strengthened. At the same time, integration with a plurality of chip parts is also strengthened. In addition, the metal frame second terminal is formed with an insulating notch for preventing the tip of each leg portion of the metal frame first terminal from coming into contact with the metal frame second terminal. Is certain.

  Preferably, a distance between the pair of first claw portions is substantially equal to a distance between the pair of second claw portions, and is substantially equal to a total width of at least two or more chip parts arranged side by side. . With such a dimensional relationship, a plurality of chip components are firmly held inside a single three-terminal electronic component.

  Preferably, the width of each magnetic core is substantially equal to or greater than the total width of at least two chip parts arranged side by side. With such a dimensional relationship, the side surface of the chip component does not protrude from the side surface of the three-terminal electronic component, and these chip components can be effectively protected.

  Preferably, a large current of 1 ampere or more can flow through the metal frame first terminal and the metal frame second terminal in which a pair of legs provided at both ends constitute a pair of external terminals. ing. In the present invention, since these terminals are made of a metal plate, a large current of 1 ampere or more, or 6 amperes or more can be passed, and is particularly suitable as a vehicle-mounted component.

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIG. 1 is an overall perspective view of a three-terminal filter according to an embodiment of the present invention.
2 is an exploded perspective view of the three-terminal filter shown in FIG.
3 is an equivalent circuit diagram of the three-terminal filter shown in FIG.
4 is a graph showing frequency characteristics of capacitor chip components included in the three-terminal filter shown in FIG.
FIG. 5 is a graph showing frequency characteristics of varistors included in the three-terminal filter shown in FIG.
FIG. 6 is a graph showing frequency characteristics of the three-terminal filter shown in FIG.

  As shown in FIGS. 1 and 2, a three-terminal filter 2 as a three-terminal electronic component according to an embodiment of the present invention has at least two chip components 4a and 4b. Each of these chip components 4a and 4b has a first end electrode 6 and a second end electrode 8 at both ends in the longitudinal direction (vertical direction in the drawing).

  Each of these chip components 4a and 4b has four side surfaces and is arranged side by side in the X-axis direction so that the side surfaces on the wide side are in contact with each other, and the first end portion of each chip component 4a and 4b The electrodes 4a and 4a are arranged close to each other so that the electrodes 4a and 4a face upward in the Z-axis direction and the second end electrodes 4b and 4b face downward in the Z-axis direction. Note that the first end electrode and the second end electrode are functionally the same electrodes, and are given different names for convenience of explanation.

  Of these chip components 4a and 4b, one chip component 4a is a capacitor chip component, and the other chip component 4b is a varistor chip component. For example, one chip part 4a is a high-capacity chip capacitor element of about 1 nF to 1 μF, and the other chip part 4b is a low-capacitance varistor element of about 1 pF to 1000 pF. The high-capacity chip capacitor element has a capacitance of preferably 10 times or more, more preferably 100 to 1000 times or more, as compared with a low-capacitance varistor element. In this embodiment, the vertical and horizontal thickness dimensions of these chip parts 4a and 4b are almost the same.

  The first end electrodes 6, 6 of these chip components 4 a, 4 b are integrally held by the curved portion 12 formed at the intermediate portion of the metal frame first terminal 10, and the second end electrodes 8, 8 are held. Is held at the center of the metal frame second terminal 30. The curved portion 12 of the metal frame first terminal 10 has a top plate portion 12a that covers the surfaces of the plurality of first end electrodes 6 to be incorporated. The X-axis direction width of the top plate portion 12a is substantially the same as the X-axis direction width of the plurality of chip components 6 and 6 arranged side by side. The Y-axis direction width of the top plate portion 12a is It is about the same as the width in the Y-axis direction. The X axis, the Y axis, and the Z axis are orthogonal to each other. Here, for convenience, the Z axis direction coincides with the height direction, and the X axis direction coincides with the arrangement direction of the chip components.

  On both sides of the bending portion 12 in the Y-axis direction, side plate portions 12b that cover the upper portions of the side surfaces in the Y-axis direction of the plurality of chip components 4a and 4b arranged side by side are integrally formed by bending. The width in the X-axis direction of the side plate portion 12b is approximately the same as the width in the X-axis direction of the plurality of chip components 4a and 4b arranged side by side.

  First claw portions 14 are integrally formed by bending on both sides of the top plate portion 12a of the bending portion 12 in the X-axis direction. Although the width | variety of the 1st nail | claw part 14 in the Y-axis direction is not specifically limited, It is comprised narrower than the width | variety of the chip components 4a and 4b in the Y-axis direction. The distance between the pair of first claw portions 14 and 14 is set larger than the total thickness of the chip components 4a and 4b in the X-axis direction before the chip components 4a and 4b are assembled. After the chip parts 4a and 4b are assembled, the first claw portions 14 are caulked to grip the chip parts 4a and 4b from both sides in a direction approaching each other. Thereby, the upper parts of these chip components 4 a and 4 b are fixed inside the curved portion 12 of the metal frame first terminal 10, and the plurality of first end electrodes 6 are curved portions 12 of the metal frame first terminal 10. Is electrically connected. In addition, it is preferable that a conductive adhesive or solder is interposed between the curved portion 12 of the metal frame first terminal 10 and the first end electrode 6. Further, the first claw portion 14 does not necessarily have to be caulked after the chip components 4a and 4b are assembled, and the chip components 4a and 4b are disposed between the pair of first claw portions by performing a solder reflow process. You may make it hold | grip.

  A pair of leg portions 16 are integrally formed on both sides in the Y-axis direction of the bending portion 12 formed at the center portion of the metal frame first terminal 10. The leg portions 16 and 16 are linearly formed before the magnetic cores 18a and 18b, which will be described later, are attached, and after passing through the through holes 20 formed in the magnetic cores 18a and 18b, respectively. 1 and 2 as shown in FIG.

  The width in the X-axis direction of each leg 16, 16 is configured to be narrower than the width in the X-axis direction of the bending portion 12. The length of each leg 16, 16 is such that when each leg 16, 16 is bent downward after passing through the through hole 20 of the magnetic core 18 a, 18 b, the tip 16 a of each leg 16, 16 is bent. The magnetic cores 18a and 18b are positioned at the bottoms of the magnetic cores 18a and 18b and do not contact the metal frame second terminals 30.

  The metal frame second terminal 30 has a flat bottom plate portion 31, and the area of the bottom plate portion 31 is an area that covers most of the second end electrodes 8 of the chip components 4a and 4b arranged side by side. is there. A pair of second claw portions 32 are integrally formed on both sides in the X-axis direction at the center portion of the bottom plate portion 31.

  The second claw portion 32 is crimped inward after the second end electrodes 8 and 8 of the plurality of chip components 4 a and 4 b are placed on the upper surface of the bottom plate portion 31, so that the chip components 4 a and 4 b approach each other. Grip from both sides. Thereby, the lower part of these chip components 4 a and 4 b is fixed to the metal frame second terminal 30, and the plurality of second end electrodes 8 are electrically connected to the metal frame second terminal 30. In addition, it is preferable that a conductive adhesive or solder is interposed between the curved portion 12 of the metal frame second terminal 30 and the second end electrode 8. Further, the second claw portion 32 does not necessarily have to be caulked after the chip components 4a and 4b are assembled, and the chip components 4a and 4b are disposed between the pair of second claw portions by performing a solder reflow process. You may make it hold | grip.

  Both sides of the bottom plate portion 31 in the Y-axis direction are set to be longer than the lengths of the chip components 4a and 4b in the Y-axis direction, and the bottom portions of the magnetic cores 18a and 18b in a state in which the magnetic cores 18a and 18b are incorporated. It is set to a length that covers a part of Insulating notches 42 are formed at the center of both sides in the Y-axis direction of the bottom plate portion 31. Each insulation notch 42 prevents the distal end 16a of the leg portion 16 from being electrically connected to the metal frame second terminal 30 in a state where the magnetic cores 18a and 18b are incorporated, thereby achieving insulation between the different poles. Is for.

  On both sides in the X-axis direction at each end portion of the bottom plate portion 31 in which the insulating notches 42 are formed, there is engagement with a taper surface 24 for engagement formed on the side surface in the X-axis direction at the bottom of the magnetic cores 18a and 18b. A pair of gripping pieces 34 are formed. Each of the magnetic cores 18 a and 18 b is fixed to the metal frame second terminal 30 by the gripping piece 34 engaging the engaging taper surface 24 by means such as caulking.

  Position restricting pieces 36 for preventing the magnetic cores 18a, 18b from approaching the chip components 4a, 4b are integrally bent at the inner edge of each engaging piece 34 in the Y-axis direction. . The length of the position restricting piece 36 in the X-axis direction is made as short as possible in order to avoid contact with the chip components 4a and 4b.

  A cover member 50 is disposed on the top of the three-terminal filter 2 in the Z-axis direction. The cover member 50 has a flat top plate portion 52. The top surface of the top plate portion 52 is a smooth surface that can be sucked by a suction nozzle in the electronic component mounting apparatus. The top plate portion 52 has a length in the Y-axis direction so as to integrally cover the upper surface of the bending portion 12 in the metal frame first terminal 10 and the upper surfaces of the pair of magnetic cores 18a and 18b.

  In the central portion of the top plate portion 52 in the Y-axis direction, cutout portions 58 are formed on both sides in the X-axis direction, and the first metal frame positioned below the top plate portion 52 in the assembled state. The first claw portion 14 of the terminal 10 is exposed from both sides in the X-axis direction.

  Both end portions in the Y-axis direction of the top plate portion 52 extend so as to almost cover the upper surfaces of the magnetic cores 18a and 18b, and upper side surfaces of the magnetic cores 18a and 18b extend at both end portions in the X-axis direction. A pair of gripping pieces 54 that are engaged with the engaging taper surface 22 formed on each other are formed. The cover member 50 is mounted on the upper part of the three-terminal filter 2 by the gripping piece 54 engaging the engagement tapered surface 22 by means such as caulking. An adhesive is interposed between the cover member 50 and the magnetic cores 18a and 18b.

  A misalignment prevention claw 56 for preventing the pair of magnetic cores 18a, 18b from moving away from each other is formed at the outer end portion in the Y-axis direction of each gripping piece 54. The misalignment prevention claw 56 is engaged with the outer end surfaces in the Y-axis direction of the magnetic cores 18a and 18b by means such as caulking.

  The metal frame first terminal 10 and the metal frame second terminal 30 can be formed, for example, by punching a metal plate such as copper or phosphor bronze and then bending it. The thickness of the metal plate constituting these terminals 10 and 30 is preferably 0.05 to 0.2 mm, more preferably 0.08 to 0.1 mm.

  The cover member 50 is made of, for example, a metal plate such as stainless steel or white or plastic, and the thickness thereof is not particularly limited, but is preferably 0.05 to 0.2 mm, more preferably 0.08 to 0.00. 1 mm.

  The magnetic cores 18a and 18b are made of a ferrite core made of a material such as ferrite or magnetic resin, and the thickness in the Y-axis direction is preferably 0.5 to 1.5 mm, more preferably 0.8 to 1.0 mm. Further, the width in the X-axis direction of these magnetic cores 18a and 18b is equal to or greater than the width in the X-axis direction of the chip components 4a and 4b arranged side by side.

  As shown in FIGS. 1 and 2, in this embodiment, the leg portions 16 of the metal frame first terminal 10 pass through the through holes 20 of the magnetic cores 18a and 18b, respectively, and are bent toward the metal frame second terminal 30 side. Processed. Thereby, inductor elements 18A and 18B shown in FIG. 3 are formed. FIG. 3 is an equivalent circuit diagram of the three-terminal filter 2. As shown in FIG. 1 to FIG. 3, the vicinity of the distal end portion 16 a in the leg portion 16 formed at both ends of the metal frame first terminal 10 constitutes two external terminals of the three terminals, and the metal frame The second terminal 30 is the other remaining external terminal among the three terminals.

  In the three-terminal filter 2 according to the present embodiment, the first end electrodes 6 and 6 of the plurality of chip components 4a and 4b are held together by the metal frame first terminal 10 and are electrically connected. The second end electrodes 8 and 8 of the chip components 4a and 4b are held together by the metal frame second terminal 30 and are electrically connected. At both ends of the metal frame first terminal 10, magnetic cores 18a and 18b are arranged in a direction substantially orthogonal to the arrangement direction of the chip components 4a and 4b. The magnetic cores 18a and 18b are firmly held by bending the leg portions of the metal frame first terminal 10 after passing through the through holes 20 of the magnetic cores 18a and 18b. The upper parts of the magnetic cores 18 a and 18 b are held by the cover member 50, and the lower parts of the magnetic cores 18 a and 18 b are held by the metal frame second terminal 30.

  Therefore, centering on the plurality of chip components 4a and 4b, the chip components 4a and 4b, the metal frame first terminal 10, the pair of magnetic cores 18a and 18b, the metal frame second terminal 30, and the cover member 50 Are firmly connected. As a result, the three-terminal electronic component 2 according to the present invention is strong against vibrations and sturdy. Therefore, it is suitable as a vehicle-mounted component.

  Further, each leg portion 16 in the metal frame first terminal 10 penetrates the through hole 20 of each magnetic core 18a, 18b, thereby forming a pair of inductor elements 18A, 18B (see FIG. 3). In addition, a circuit in which a plurality of capacitors are connected in parallel can be realized by a single three-terminal electronic component 2. In addition, since the pair of legs 16 of the metal frame first terminal 10 and the metal frame second terminal 30 constitute three external terminals in the three-terminal electronic component 2, these terminals have 1 ampere. As described above, it is possible to flow a large current of preferably 6 amperes or more.

  Further, the periphery of the plurality of chip components 4a and 4b is covered with the metal frame first terminal 10, the pair of magnetic cores 18a and 18b, the metal frame second terminal 30, and the cover member 50, and The plurality of chip parts 4a and 4b are arranged in a direction substantially orthogonal to the arrangement direction of the magnetic cores 18a and 18b. Therefore, the three-terminal electronic component 2 of the present embodiment is compact and highly reliable. Therefore, the three-terminal electronic component 2 of the present embodiment can operate even under severe temperature conditions, and is particularly suitable as a vehicle-mounted component.

  Furthermore, in this embodiment, since a capacitor and a varistor are arranged in parallel in a single three-terminal electronic component 2, noise removal in a wide band is possible with a single component. It can be used as a simple broadband noise filter. For example, when one chip component 4a is a 100 nF high-capacitance capacitor having the frequency characteristics shown in FIG. 4, and the other chip component 4b is a 220 pF low-capacitance varistor having the frequency characteristics shown in FIG. As shown in FIG. 6, the frequency characteristics of the electronic component 2 combining the above are characteristics having a noise removal effect in a wide frequency range. 4 to 6, the horizontal axis represents frequency, and the vertical axis represents insertion loss.

  In the present embodiment, it is possible to realize a filter element having an excellent noise removal effect in a wide band. In addition, in this embodiment, since the capacitor element and the varistor element can be incorporated into the single three-terminal electronic component 2, compactness, space saving, and high reliability can be realized at the same time. be able to.

  Further, as shown in FIG. 3, when the three-terminal filter 2 of the present embodiment is connected to the power supply line in front of the connector 62, the connector 62 and the chip component 4b constituting the varistor must be connected. The inductor element 18B exists. Therefore, there is almost no possibility that ground noise is superimposed on the power supply line and leaked from the connector 62 to the outside. On the other hand, in the conventional three-terminal filter, it is necessary to connect the varistor chip 4c separately from the three-terminal filter in order to absorb the surge voltage. Therefore, depending on the circuit design, the varistor chip 4 c may be connected near the connector 62, and ground noise may be superimposed on the power supply line through the varistor chip 4 c, and noise may leak to the outside of the connector 62. It was. In this embodiment, such a situation can be avoided.

  In this embodiment, the grip piece 54 of the cover member 50 is formed with a misalignment prevention claw 56 that prevents the pair of magnetic cores 18a and 18b from moving in a direction away from each other. By forming the misalignment prevention claw 56, the misalignment of the magnetic cores 18a and 18b can be suppressed.

  Further, since the upper surface of the cover member 50 is a smooth surface that can be sucked by the suction nozzle, suction holding by the suction nozzle of the electronic component mounting machine is ensured, and the circuit board of the three-terminal electronic component 2 or the like Automatic mounting on the unit becomes easy.

  Furthermore, the metal frame second terminal 30 is provided with a position restricting piece 36 that suppresses the magnetic cores 18a and 18b from being too close to the chip components 4a and 4b. Along with the displacement prevention claw 56, it is possible to effectively prevent the displacement of the magnetic cores 18a and 18b.

  Each leg portion 16 in the metal frame first terminal 10 passes through the through holes 20 of the magnetic cores 18a and 18b and is then bent in the direction of the metal frame second terminal 30 to thereby form the metal frame first terminal 10 and the magnetic core 18a. , 18b becomes stronger and the integration with the plurality of chip parts 4a, 4b becomes stronger. Further, by forming an insulating notch 42 in the metal frame second terminal 30 for suppressing the tips 16a of the legs 16 of the metal frame first terminal 10 from coming into contact with the metal frame second terminal 30, Insulation between these terminals is ensured.

  Moreover, in this embodiment, the distance between a pair of 1st nail | claw parts 14 is substantially equal to the distance between a pair of 2nd nail | claw parts 32, and at least 2 or more chip components 4a and 4b arrange | positioned side by side. Is approximately equal to the total width. With such a dimensional relationship, the plurality of chip components 4 a and 4 b are firmly held inside the single three-terminal electronic component 2.

  Furthermore, the three-terminal type electrons are obtained by making the width of each magnetic core 18a, 18b substantially equal to or greater than the total width of at least two or more chip components 4a, 4b arranged side by side. The side surfaces of the chip components 4a and 4b do not protrude from the side surface of the component 2, and the chip components 4a and 4b can be effectively protected.

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

  For example, as a chip component incorporated in the three-terminal electronic component of the present invention, other capacitor elements or varistor elements may be incorporated in addition to a pair of capacitor elements and varistor elements. Further, a capacitor element, a varistor element or the like may be incorporated.

  Further, the three-terminal electronic component according to the present invention is not limited to the power line of the IC, but also the power lines of other circuits, the input / output terminals of the DC-DC converter, the on-vehicle electronic devices (car navigation system, audio, control circuit, It can be suitably used for power lines of various motors.

FIG. 1 is an overall perspective view of a three-terminal filter according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the three-terminal filter shown in FIG. FIG. 3 is an equivalent circuit diagram of the three-terminal filter shown in FIG. FIG. 4 is a graph showing frequency characteristics of a high-capacitance capacitor element included in the three-terminal filter shown in FIG. FIG. 5 is a graph showing frequency characteristics of a low-capacitance varistor element included in the three-terminal filter shown in FIG. FIG. 6 is a graph showing frequency characteristics of the three-terminal filter shown in FIG.

Explanation of symbols

2 ... 3 terminal filter 4a, 4b ... Chip part 6 ... 1st end electrode 8 ... 2nd end electrode 10 ... Metal frame 1st terminal 12 ... Bending part 14 ... 1st nail | claw part 16 ... Leg part 16a ... Tip 18a 18b ... Magnetic core 20 ... Through hole 30 ... Metal frame second terminal 32 ... Second claw part 34 ... Grip piece 36 ... Position regulating piece 42 ... Insulation notch 50 ... Cover member 54 ... Grip piece 56 ... Misalignment prevention claw

Claims (10)

At least a pair of capacitor chip parts and varistor chip parts each having a first end electrode and a second end electrode at both ends,
The first end electrodes of at least two or more of the chip components arranged side by side are electrically connected, and a pair of first claw portions for gripping these chip components from both sides in a direction approaching each other are formed. A metal frame first terminal having a curved portion at an intermediate portion and a pair of legs provided at both ends constituting a pair of external terminals;
A pair of magnetic cores formed with through holes through which a pair of the leg portions provided at both ends of the metal frame first terminal pass, respectively;
The second end electrodes of at least two or more of the chip components arranged side by side are electrically connected, and a pair of second claw portions are formed to grip these chip components from both sides in a direction approaching each other. A metal frame second terminal,
A cover member that integrally covers the upper part of the intermediate portion of the metal frame first terminal and the upper part of the pair of magnetic cores, and is formed with a gripping piece that grips the upper part of each magnetic core;
A three-terminal electronic component in which at least two or more of the chip components are arranged in a direction substantially orthogonal to the arrangement direction of the magnetic cores.   The three-terminal electronic component according to claim 1, wherein a capacitance of the capacitor chip component is larger than a capacitance of the varistor chip component.   3. The three-terminal electronic component according to claim 2, wherein a capacitance of the capacitor chip component is 10 times or more than a capacitance of the varistor chip component.   The three-terminal electron according to any one of claims 1 to 3, wherein the grip piece of the cover member is formed with a misalignment prevention claw that prevents the pair of magnetic cores from moving in a direction away from each other. parts.   5. The three-terminal electronic component according to claim 1, wherein an upper surface of the cover member is a smooth surface that can be sucked by a suction nozzle.   6. The three-terminal electronic component according to claim 1, wherein the metal frame second terminal is formed with a position restricting piece that prevents each of the magnetic cores from being too close to the chip component. Each leg portion in the first metal frame terminal is configured to be bent in the direction of the second metal frame terminal after passing through the through-hole of the magnetic core, so that each magnetic core is integrated with the chip component. And
7. The metal frame second terminal is formed with an insulating notch for suppressing the tip of each leg portion of the metal frame first terminal from coming into contact with the metal frame second terminal. The three-terminal electronic component according to any one of the above.   A distance between the pair of first claw portions is approximately equal to a distance between the pair of second claw portions, and is approximately equal to a total width of at least two or more chip parts arranged side by side. The three-terminal electronic component according to claim 1.   The three-terminal electronic component according to any one of claims 1 to 8, wherein the width of each magnetic core is substantially equal to or greater than the total width of at least two or more chip components arranged side by side.   A pair of legs provided at both ends allows a large current of 1 ampere or more to flow through the metal frame first terminal and the metal frame second terminal constituting a pair of external terminals. Item 10. A three-terminal electronic component according to any one of Items 1 to 9.

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