JP2006311365A - Three terminal electronic component and its using method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three terminal electronic component in which an excellent decoupling function is attained by a single component while having a noise removing function. <P>SOLUTION: The three terminal electronic component 2 comprises at least one chip component 4a or 4b having first and second electrodes at both ends, a metal frame first terminal 10 connected electrically with the first end electrode 6 of the chip component and having a pair of legs 16 provided at both ends to constitute a pair of external terminals, and a pair of first and second cores 18a and 18b each having through holes 20 at both ends of the metal frame first terminal 10 for passing the pair of legs 16. The chip component 4a, 4b is a capacitive element and permeability of the first core 18a is lower than that of the second core 18b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a three-terminal electronic component having a noise removal function and an excellent decoupling function, and a method of using the same. More specifically, the present invention relates to a vibration-resistant, sturdy, and large current. The present invention relates to a three-terminal electronic component that is highly reliable, contributes to space saving, can be operated 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.

  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 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 shown in Patent Document 3 has a structure in which an inductor element is arranged on both sides of a capacitor in terms of electric circuit, and thus is excellent in noise removal function, but has a decoupling function. There was a problem in terms. In other words, since the inductor element is arranged on both sides of the capacitor, the decoupling function by the capacitor is suppressed by the inductor element when the three-terminal electronic component is used for the power supply line of a functional element such as an IC. Will be.

  Therefore, in particular, when high-frequency operation is required, it is necessary to separately prepare and connect a decoupling capacitor in addition to the LC filter that is a three-terminal electronic component.

On the other hand, with the miniaturization of equipment, the component placement space is decreasing. In addition, if one magnetic core is removed in a conventional three-terminal electronic component, the structure becomes unbalanced in the three-terminal electronic component, causing a problem in terms of component strength. There is a demand for an electronic component that has a good balance between a noise removal function and a decoupling function with a single component.
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 a three-terminal electronic component having a single component, a noise removal function and an excellent decoupling function, and a method of using the same. Is to provide.

  In addition, the second object of the present invention is to be strong against vibration, strong and capable of flowing a large current, compact and reliable, and capable of operating even under severe temperature conditions, especially for in-vehicle use. It is to provide a three-terminal electronic component suitable as a component.

In order to achieve the first object, a three-terminal electronic component according to the first aspect of the present invention provides:
At least one chip component having a first end electrode and a second end electrode at both ends;
A metal frame first terminal in which a first end electrode of the chip component is electrically connected, and a pair of legs provided at both ends constitute a pair of external terminals;
A pair of first and second cores having through-holes through which a pair of the leg portions provided at both ends of the metal frame first terminal pass, respectively;
The chip component is a capacitive element;
The magnetic permeability of the first core is lower than the magnetic permeability of the second core.

  Preferably, the first core is made of a nonmagnetic material, and the second core is made of a magnetic material.

The method of using the three-terminal electronic component according to the present invention is as follows:
The leg portion of the metal frame first terminal exposed through the through hole of the first core in the three-terminal electronic component is connected to the functional element side,
The leg portion of the metal frame first terminal exposed through the through hole of the second core is connected to the power supply side,
The second end electrode of the chip component is connected to the ground side.

  The functional element to which the three-terminal electronic component of the present invention is connected is not particularly limited, but particularly high-speed operation and high power consumption, such as an IC, CPU, MPU, DSP, DC-DC converter, and inverter. The thing etc. are preferable.

  In the three-terminal electronic component according to the present invention, the first core is made of a nonmagnetic material, for example, by forming the first core with a nonmagnetic material. Then, by connecting the leg portion of the metal frame first terminal exposed through the through hole of the first core to the functional element side, the inductor component is eliminated on the functional element side. Therefore, it becomes easy to supply current at a high speed from the chip component made of a capacitive element to the functional element side. That is, the decoupling function is improved, voltage fluctuation in the power supply line of the functional element is suppressed, and high-frequency current can be easily supplied.

  Moreover, since the second core is made of a magnetic material, the leg portion of the metal frame first terminal exposed through the through-hole of the second core becomes an inductor component, and is a chip component made of a capacitive element. In addition, the LC circuit is configured and has a noise removal function.

  In the present invention, since the inductor component is not removed by removing the first core, the chip component is sandwiched between the two cores, and the structure is stable. At the same time, the overall component strength is improved.

  In the present invention, the first core may be composed of both a magnetic material and a nonmagnetic material, without being completely composed of a nonmagnetic material. In that case, the magnetic permeability of the first core is preferably lower by three digits or more than the magnetic permeability of the second core.

  With this configuration, even though the first core is not a nonmagnetic material, the magnetic permeability of the first core is sufficiently lower than the magnetic permeability of the second core. Therefore, when connected as described above, the inductor component on the functional element side is sufficiently weak, and the decoupling function of the three-terminal electronic component of the present invention is improved as compared with the conventional one. In this case, since the inductor component is formed on both sides of the chip component made of the capacitive element, the noise filter function is improved. Therefore, by adjusting the low permeability of the first core relative to the permeability of the second core according to the purpose of use, the balance between the decoupling function and the noise filter function of the three-terminal electronic component in the present invention is achieved. It becomes possible.

  In the first aspect of the present invention, preferably, the three-terminal electronic component further includes a metal frame second terminal to which the second end electrode of the chip component is electrically connected. In that case, since the chip component is sandwiched between the metal frame first terminal and the metal frame second terminal, the structure is further stabilized and the overall component strength is improved.

In the first aspect of the present invention,
Preferably, the metal frame first terminal has a curved portion formed with a pair of first claw portions for gripping the first end electrode of the chip component from both sides in an intermediate portion,
The metal frame second terminal has a pair of second claws for gripping the second end electrode of the chip part from both sides. By adopting such a structure, the chip component can be held more securely, and the overall strength is improved.

  1st viewpoint of this invention WHEREIN: The cover in which the upper part of the intermediate part of the said metal frame 1st terminal and the upper part of a pair of said core are covered integrally, and the holding piece which hold | grips the upper part of each core is formed It further has a member. By adopting such a structure, the suction nozzle of the component mounting apparatus is easily sucked on the upper surface of the cover member, and the mounting of the components is facilitated. Also, the overall strength of the three-terminal electronic component is improved.

In order to achieve the first object and the second object, a three-terminal electronic component according to a second aspect of the present invention includes:
At least a pair of 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 cores formed with through-holes through which a pair of the leg portions provided at both ends of the first terminal of the metal frame, 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 part of the metal frame first terminal and the upper part of the pair of cores, and is formed with a gripping piece that grips the upper part of each core;
At least two or more of the chip components are arranged in a direction substantially perpendicular to the arrangement direction of the cores,
The magnetic permeability of the first core is lower than the magnetic permeability of the second core.

  Preferably, the first core is made of a nonmagnetic material, and the second core is made of a magnetic material. Alternatively, the first core includes both a magnetic material and a nonmagnetic material, and the second core is made of a magnetic material. Preferably, the magnetic permeability of the first core is lower by three digits or more than the magnetic permeability of the second core. The magnetic permeability of the nonmagnetic material is infinitely close to 1.

  The three-terminal electronic component according to the second aspect of the present invention can be used in the same manner as the three-terminal electronic component according to the first aspect of the present invention, and exhibits the same effects as described above. Furthermore, the following effects are exhibited.

  That is, in the three-terminal electronic component according to the second aspect of the present invention, the first end electrodes of the plurality of chip components are held together and electrically connected by the metal frame first terminal. Further, the second end electrodes of these chip components are held together by the metal frame second terminal and are electrically connected. And the 1st core and the 2nd core are 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. These cores are firmly held by bending the leg portions of the metal frame first terminals after passing through the through holes of the respective cores. The upper part of each core is gripped by the cover member, and the lower part of each core is gripped by the metal frame second terminal.

  Therefore, the chip parts, the metal frame first terminal, the pair of cores, the metal frame second terminal, and the cover member are firmly connected to each other 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 core to constitute a pair of inductor elements, and a plurality of chip components (for example, capacitors) are connected in parallel between the inductor elements. This circuit can be realized with 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 parts is covered with a metal frame first terminal, a pair of cores, a metal frame second terminal, and a cover member, and the plurality of chip parts are arranged in an array of cores. They are arranged in a direction substantially orthogonal to the 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 second aspect of the present invention, since a plurality of chip components (for example, capacitors) are arranged in parallel in a single three-terminal electronic component, It can be used as a broadband noise filter capable of removing noise in a wide band. In addition, the three-terminal electronic component of the present invention can be used as a decoupling capacitor or the like. At that time, a plurality of chip components (for example, capacitors) are arranged in parallel in a single three-terminal electronic component. Since the structure is arranged in a space, it is possible to save space.

  In the second aspect of the present invention, preferably, the chip component is a capacitive element, and one capacitance is larger than the other capacitance. If the capacitance is different, the frequency characteristics are also changed. Generally, a low capacitance capacitor is excellent in noise removal effect in a high frequency range, and a high capacitance capacitor is excellent in noise reduction effect in a low frequency range. Therefore, by combining these capacitors, it is possible to realize a filter element having an excellent noise removal effect in a wide band. Moreover, in the present invention, since a plurality of capacitor elements can be incorporated into a single three-terminal electronic component, compactness, space saving, and high reliability can be realized at the same time.

  In the second aspect of the present invention, preferably, the capacitance of one of the chip components is 10 times or more than the capacitance of the other chip component. By changing the capacity within such a range, it is possible to easily realize a wide band. Preferably, both of the pair of chip components are capacitor elements.

  In the second aspect of the present invention, preferably, one of the pair of chip components is a capacitor element and the other is a varistor element. By arranging a varistor element in addition to the capacitor element as the chip component, not only a noise removal function but also a surge prevention function can be realized.

  Preferably, the grip piece of the cover member is formed with a misalignment prevention claw that prevents the pair of cores from moving in a direction away from each other. By forming the misalignment prevention claws, the misalignment of the 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 prevents each of the cores from being too close to the chip component. This position restricting piece can prevent the positional deviation of the core together with the above-described positional deviation preventing claw of the cover member.

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

  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 of the metal frame first terminal penetrates the through hole of the 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 core becomes strong, Integration with multiple chip components is also strong. 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 core is substantially equal to or greater than the total width of at least two or more of the chip components 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.
FIG. 4 is an overall perspective view of a three-terminal filter according to another embodiment of the present invention.

  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 legs 16 and 16 are formed in a straight line before the first and second cores 18a and 18b, which will be described later, are attached to the through holes 20 formed in the cores 18a and 18b. After passing, it is bent as shown in FIGS.

  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 core 18 a, 18 b, the tip 16 a of each leg 16, 16 is It is located at the bottom of each of the cores 18 a and 18 b and has a length that does not contact the metal frame second terminal 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 one of the bottom portions of the cores 18a and 18b is installed in the state where the cores 18a and 18b are incorporated. The length is set so as to cover the part. Insulating notches 42 are formed at the center of both sides in the Y-axis direction of the bottom plate portion 31. Each insulating notch 42 prevents the tip 16a of the leg portion 16 from being electrically connected to the metal frame second terminal 30 in a state in which the cores 18a and 18b are incorporated, and insulates between the different poles. belongs to.

  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, it engages with an engagement taper surface 24 formed on the side surface in the X-axis direction at the bottom of the cores 18a and 18b. A pair of gripping pieces 34 are formed. The cores 18 a and 18 b are 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 cores 18a and 18b from approaching the chip components 4a and 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 curved portion 12 of the metal frame first terminal 10 and the upper surfaces of the pair of 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 cores 18a and 18b, and are formed on the upper side surfaces of the cores 18a and 18b at both end portions in the X-axis direction. A pair of gripping pieces 54 that are engaged with the engaging taper surface 22 is 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.

  A misalignment prevention claw 56 for preventing the pair of cores 18a, 18b from moving away from each other is formed on the outer end of each gripping piece 54 in the Y-axis direction. The misalignment prevention claw 56 engages with the outer end surfaces in the Y-axis direction of the 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.

  One of the cores 18a and 18b is constituted by a nonmagnetic core made of a material such as forsterite or resin, and the other second core 18b is made of ferrite or magnetic resin, for example. It is comprised with the magnetic core comprised with the material of. The outer sizes of these two cores 18a and 18b are substantially the same, 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 the 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 cores 18a and 18b, respectively, and are bent to the metal frame second terminal 30 side. Is done. As a result, as shown in FIG. 3, an inductor element 18B is formed in a portion corresponding to the second core 18b made of a magnetic core, and corresponds to the first core 18a made of a nonmagnetic core. The inductor element 18 </ b> A is not formed in the portion to be processed. FIG. 3 is an equivalent circuit diagram of the three-terminal filter 2 of the present embodiment.

  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. Cores 18a and 18b are arranged at both ends of the metal frame first terminal 10 in a direction substantially orthogonal to the arrangement direction of the chip components 4a and 4b. The cores 18a and 18b are firmly held by bending the legs of the metal frame first terminal 10 after passing through the through holes 20 of the cores 18a and 18b. The upper portions of the cores 18 a and 18 b are gripped by the cover member 50, and the lower portions of the cores 18 a and 18 b are gripped by the metal frame second terminals 30.

  Accordingly, with the chip components 4a and 4b as the center, the chip components 4a and 4b, the metal frame first terminal 10, the pair of 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, one leg portion 16 in the metal frame first terminal 10 penetrates the through hole 20 of the second core 18b, thereby forming an inductor element 18B (see FIG. 3), and a capacitor and a varistor with respect to the inductor element. 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 cores 18a and 18b, the metal frame second terminal 30, and the cover member 50, and A plurality of chip components 4a and 4b are arranged in a direction substantially orthogonal to the arrangement direction of the 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 the present 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. can do.

  Further, as shown in FIG. 3, when the three-terminal filter 2 of the present embodiment is connected to the power supply line of the IC 60 as a functional element as shown below, the following operational effects are obtained.

  That is, in this embodiment, the leg portion 16 of the metal frame first terminal 10 exposed through the through hole 20 of the first core 18a is connected to the IC 60 side, and penetrates the through hole 20 of the second core 18b. The exposed leg portion 16 of the metal frame first terminal 10 is connected to the power supply Vcc side, and the metal frame second terminal 30 is connected to the ground side. With such a connection relationship, the inductor element 18A is not formed in the circuit between the chip component 4a and the IC 60 constituted by the capacitor elements, and current is supplied from the chip component 4a to the IC 60 at high speed. It becomes easy. Therefore, the decoupling function is improved, voltage fluctuation in the power supply line of the functional element is suppressed, and high-frequency current can be easily supplied.

  In the present embodiment, as shown in FIG. 3, a chip component 4a made of a capacitor element and an inductor element 18B are formed in a single three-terminal electronic component 2, and these constitute an LC circuit. And exhibits a noise removal function. Furthermore, since the single three-terminal electronic component 2 further includes a chip component 4b made of a varistor element, it also has a surge voltage absorbing function in addition to the noise removing function.

  In the present embodiment, the grip piece 54 of the cover member 50 is formed with a misalignment prevention claw 56 that prevents the pair of cores 18a and 18b from moving in a direction away from each other. By forming the misalignment prevention claws 56, misalignment of the 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 formed with a position restricting piece 36 that prevents the cores 18a and 18b from approaching the chip parts 4a and 4b too much. Together with the prevention claw 56, it is possible to effectively prevent the misalignment of the cores 18a and 18b.

  Each leg portion 16 in the metal frame first terminal 10 passes through the through holes 20 of the cores 18a and 18b, and is then bent in the direction of the metal frame second terminal 30 so that the metal frame first terminal 10 and the cores 18a and 18b are bent. The integration with the plurality of chip parts 4a and 4b is also strengthened. 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.

  Further, the three-terminal electronic component is configured such that the width of each core 18a, 18b is approximately 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 surfaces of the two, 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. Moreover, in the present invention, chip components such as a capacitor element and a varistor element may be incorporated.

  In the above-described embodiment, the chip component 4a made of a capacitor element and the chip component 4b made of a varistor element are combined, but the combination of chip components 4a and 4b made of two capacitor elements having different capacitances. May be.

  By holding chip components composed of capacitor elements having different capacities in a single three-terminal electronic component 2, it can be used as a broadband noise filter capable of removing noise in a broadband. For example, when one chip component 4a is a high-capacitance capacitor of 100 nF and the other chip component 4b is a low-capacitance varistor of 220 pF, the frequency characteristic of the electronic component 2 that combines these is a noise in a wide frequency region. Has a removal effect.

  Furthermore, in the present invention, as shown in FIG. 4, a three-terminal electronic component 2a in which only a chip component 4a made of a single capacitor element or varistor element is held inside may be used. In the embodiment shown in FIG. 4, since only the single chip component 4a is built in, the misalignment prevention claw 56a formed on the grip piece 54 of the cover member 50 is provided outside the cores 18a and 18b. Rather, it can be formed inside. This is because there is no interference with the chip component 4a. For the same reason, the length in the X-axis direction of the position restricting piece 36a formed on the metal frame second terminal 30 is longer than the length in the X-axis direction of the position restricting piece 36 shown in FIG. can do. The three-terminal filter of this embodiment shown in FIG. 4 has the same effects as those of the embodiment shown in FIGS. 1 to 3 except that it has no surge voltage absorbing effect.

  In the present invention, the first core 18a may be composed of a mixed material or a mixed structure of a nonmagnetic material and a magnetic material instead of a complete nonmagnetic core. That is, the outer dimensions of the first core 18a are the same as the outer dimensions of the second core 18b made of a magnetic core, and the material or structure of the first core 18a is changed.

  In order to make the material of the first core 18a a mixed material of a nonmagnetic material and a magnetic material, the above-described magnetic material may be formed by, for example, dispersing in a synthetic resin stock solution such as a liquid crystal polymer and performing injection molding. it can. By changing the content ratio of the magnetic material, the magnetic permeability of the first core 18a can be changed. Also, the magnetic permeability of the first core 18a can be changed by making the structure of the first core 18a a composite of a nonmagnetic material portion and a magnetic material portion.

  With this configuration, even though the first core 18a is not entirely a nonmagnetic material, the magnetic permeability of the first core 18a is sufficiently lower than the magnetic permeability of the second core 18b. Therefore, when connected as shown in FIG. 3, the inductor component 18A on the IC 60 side is sufficiently weak, and the decoupling function is improved as compared with the conventional case. In this case, since the inductor elements 18A and 18B are formed on both sides of the chip component 4a made of a capacitor element, the noise filter function is improved. Therefore, if the low permeability of the first core 18a relative to the permeability of the second core 18b is adjusted according to the purpose of use, the balance between the decoupling function and the noise filter function of the three-terminal filter 2 can be achieved. It becomes possible.

  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 an overall perspective view of a three-terminal filter according to another embodiment of the present invention.

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 ... Core 20 ... Through hole 30 ... Metal frame second terminal 32 ... Second claw part 34 ... Grip piece 36 ... Position restricting piece 42 ... Insulation notch 50 ... Cover member 54 ... Grip piece 56 ... Misalignment prevention claw 60 ... IC (functional element)
62 ... Power line

Claims (20)

At least one chip component having a first end electrode and a second end electrode at both ends;
A metal frame first terminal in which a first end electrode of the chip component is electrically connected, and a pair of legs provided at both ends constitute a pair of external terminals;
A pair of first and second cores having through-holes through which a pair of the leg portions provided at both ends of the metal frame first terminal pass, respectively;
The chip component is a capacitive element;
A three-terminal electronic component, wherein the magnetic permeability of the first core is lower than the magnetic permeability of the second core.   The three-terminal electronic component according to claim 1, wherein the first core is made of a nonmagnetic material, and the second core is made of a magnetic material.   The three-terminal electronic component according to claim 1, wherein the first core includes both a magnetic material and a nonmagnetic material, and the second core is formed of a magnetic material.   2. The three-terminal electronic component according to claim 1, wherein the magnetic permeability of the first core is three orders of magnitude lower than the magnetic permeability of the second core.   The three-terminal electronic component according to any one of claims 1 to 4, further comprising a metal frame second terminal to which a second end electrode of the chip component is electrically connected. The metal frame first terminal has a curved portion formed with a pair of first claw portions for gripping the first end electrode of the chip component from both sides in an intermediate portion,
6. The three-terminal electronic component according to claim 5, wherein the metal frame second terminal has a pair of second claw portions that hold the second end electrode of the chip component from both sides.   7. A cover member that integrally covers an upper portion of an intermediate portion of the first terminal of the metal frame and an upper portion of the pair of cores, and is formed with a grip piece that grips the upper portion of each core. The three-terminal electronic component according to any one of the above. At least a pair of 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 cores formed with through-holes through which a pair of the leg portions provided at both ends of the first terminal of the metal frame, 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 part of the metal frame first terminal and the upper part of the pair of cores, and is formed with a gripping piece that grips the upper part of each core;
At least two or more of the chip components are arranged in a direction substantially perpendicular to the arrangement direction of the cores,
A three-terminal electronic component, wherein the magnetic permeability of the first core is lower than the magnetic permeability of the second core.   The three-terminal electronic component according to claim 8, wherein the first core is made of a nonmagnetic material, and the second core is made of a magnetic material.   The three-terminal electronic component according to claim 8, wherein the first core includes both a magnetic material and a nonmagnetic material, and the second core is made of a magnetic material.   9. The three-terminal electronic component according to claim 8, wherein the magnetic permeability of the first core is three orders of magnitude lower than the magnetic permeability of the second core.   The three-terminal electronic component according to any one of claims 8 to 11, wherein the chip component is a capacitive element, and one capacitance is larger than the other capacitance.   The three-terminal electronic component according to claim 12, wherein the capacitance of one of the chip components is 10 times or more than the capacitance of the other chip component.   The three-terminal electronic component according to claim 8, wherein both of the pair of chip components are capacitor elements.   The three-terminal electronic component according to any one of claims 8 to 13, wherein one of the pair of chip components is a capacitor element and the other is a varistor element.   The three-terminal electronic component according to any one of claims 8 to 15, wherein the grip piece of the cover member is formed with a misalignment prevention claw that prevents the pair of cores from moving in a direction away from each other. .   The three-terminal electronic component according to claim 8, wherein an upper surface of the cover member is a smooth surface that can be sucked by a suction nozzle.   18. The three-terminal electronic component according to claim 8, wherein the metal frame second terminal is formed with a position regulating piece that prevents each of the cores from being too close to the chip component. Each leg in the metal frame first terminal is configured to be bent in the direction of the metal frame second terminal after passing through the through-hole of the core, so that each core is integrated with the chip component. ,
The said metal frame 2nd terminal is formed with the insulation notch for suppressing that the front-end | tip of each leg in the said metal frame 1st terminal contacts the said metal frame 2nd terminal. The three-terminal electronic component according to any one of the above. The leg portion of the metal frame first terminal exposed through the through hole of the first core in the three-terminal electronic component according to any one of claims 1 to 19, is connected to the functional element side,
The leg portion of the metal frame first terminal exposed through the through hole of the second core is connected to the power supply side,
A method of using a three-terminal electronic component, wherein the second end electrode of the chip component is connected to the ground side.

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