JPH0680281U - AC inlet filter connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain an AC inlet filter connector that has a structure that does not require complicated assembly work, has good mass productivity, and can be miniaturized. [Structure] A pair of input terminal parts 1, a ground terminal part 2 and a ground inductor 3 are provided, and an engaging hole 7 is formed in a ground inductor mounting part 2c of the ground terminal part 2. Protrusion 2 for locking the core
The core part 25 is housed in a core case formed by 2 and is further covered with a rubber cover, and is wound around a core part 25.
The locking protrusion 22 is fitted in the engaging hole portion 7, the earth inductor 3 is positioned and fixed to the earth inductor mounting portion 2c, and integrally molded with insulating resin to form the resin molded body 4 having the front concave portion 5. It is a thing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter element for removing noise, particularly an AC inlet filter connector having a built-in earth inductor.

[0002]

[Prior art]

 Conventionally, as an AC inlet filter connector having a filter element, the structure shown in Japanese Utility Model Laid-Open No. 60-76880 is known. In this case, a shield case, which is a separate component, is connected to the connector body, and the inductor as a filter element is housed in this shield case.

[0003]

[Problems to be solved by the device]

 By the way, in the case of a structure such as Japanese Utility Model Laid-Open No. 60-76880, it takes a lot of time to dispose the filter element in the shield case and to insulate the shield case from the filter element, resulting in poor assembling workability and downsizing. It was not suitable for.

On the other hand, Japanese Utility Model Application Laid-Open No. 64-33223 proposes an inlet filter in which a pair of input terminals are wrapped with a core and molded with resin. However, in this case, the core that can be used is an elliptic ferrite bead core that does not have a winding, and there is a dislike that it cannot be applied to an inductor that has a winding.

In view of the above points, the present invention aims to provide an AC inlet filter connector which has a structure that does not require complicated assembly work, has good mass productivity, and can be downsized.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, an AC inlet filter connector of the present invention includes a pair of input terminal parts, a ground terminal part, and a ground inductor, and

The input terminal component has a front input terminal portion and a rear input terminal portion,

The ground terminal component has a front ground terminal portion, a ground inductor mounting portion, and a rear ground terminal portion separated from the ground inductor mounting portion, and an engaging hole portion is formed in the ground inductor mounting portion. Cage,

The earth inductor is configured by housing an annular magnetic core in a core case formed with a locking projection, and further winding a winding around a core part covered with a rubber cover,

The locking projection is fitted in the engaging hole portion, the earth inductor is positioned and fixed to the ground inductor mounting portion, and integrally molded with an insulating resin, and the front side portion is formed in a front concave portion of a resin molded body. The configuration is such that the input terminal and the front ground terminal are projected.

[0011]

[Action]

 In the AC inlet filter connector of the present invention, since the ground inductor is positioned and fixed by the ground terminal component, it is possible to prevent the ground inductor from moving and becoming a defective product due to the impact during resin molding. In addition, the earth inductor is constructed by winding a winding around a core part that houses an annular magnetic core such as ferrite in a core case and covers an elastic rubber cover. The generated stress applied to the magnetic core can be relaxed, and the deterioration of the characteristics of the magnetic core and the occurrence of variations in characteristics can be prevented. Furthermore, compared to the conventional general structure in which the filter element is housed in the case that is integrated with the connector, the manufacturing and assembly work is simpler, and the external dimensions of the resin molded product when integrally molded with insulating resin are minimized. As a result, downsizing can be achieved.

[0012]

【Example】

 An embodiment of an AC inlet filter connector according to the present invention will be described below with reference to the drawings.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 7. As shown in FIGS. 1 and 2, the AC inlet filter connector includes a pair of input terminal parts 1, a ground terminal part 2 and a ground inductor 3 as a filter element, and these three parts are made of insulating resin. It is integrally molded with a plastic resin. That is, the molded body 4 made of thermoplastic resin has a front concave portion 5 for fitting with a plug and a mounting flange portion 6 in the front surface, and the front side AC power input included in the pair of input terminal parts 1 is provided in the concave portion 5. The front side ground terminal portion 2a of the terminal portion 1a and the ground terminal component 2 is fixed so as to project. A mounting hole 6a is formed in the mounting collar portion 6. Further, the rear input terminal portion 1b and the rear ground terminal portion 2b formed at the other ends of the input terminal component 1 and the ground terminal component 2 are drawn out to the back side of the molded body 4 (however, as described later. , The rear ground terminal portion 2b is separated from the front ground terminal portion 2a). The rear input terminal portion 1b and the rear ground terminal portion 2b have a lug terminal shape or the like.

The portion embedded between the front ground terminal portion 2a and the rear ground terminal portion 2b of the ground terminal component 2 in the molded body 4 serves as a ground inductor mounting portion 2c, and the ground inductor 3 is attached to the ground inductor mounting portion 2c. The engaging hole portion 7 is formed. Positioning notches 7a are formed on both sides of the engaging hole 7 as shown in FIG. 7 showing the ground terminal component 2 in a developed state. Further, a bent piece portion 11 that is bent perpendicularly to the rear ground terminal portion 2b is integrally formed. Further, the earth inductor mounting portion 2c has an internal terminal portion 8 having a wire arranging groove 8a for inserting the lead wire 9a of the winding 9 of the earth inductor 3 as shown in FIG. The bent piece portion 11 integrated with the ground terminal portion 2b has an internal terminal portion 10 having a wire arranging groove 10a into which the lead wire 9b of the winding 9 is inserted, as shown in FIG. The thickness of the internal terminal portion 8 is thin in consideration of soldering of the lead wire 9a.

As shown in FIGS. 3 to 5, a core case 21 for accommodating an annular magnetic core (toroidal core) 20 such as ferrite is made of an insulating resin and has a core case body 21a and an annular recessed body formed therein. The core case body 21a is integrally formed with a pair of locking projections 22 on the outer peripheral surface of the core case body 21a. Further, ribs 23 that define the winding range are formed on the outer peripheral surface of the core case body 21a. The elastic rubber cover 24 is an insulative cover having a U-shaped cross section having an outer peripheral portion and both end surface portions (no inner peripheral portion). The annular magnetic core 20 is housed in the core case 21a, the lid 21b is fitted and integrated, and the winding 9 is wound in the winding region between the ribs 23 of the core component 25 of FIG. 4 covered with the rubber cover 24. The earth inductor 3 is constructed by turning. Before the integral molding with the thermoplastic resin, the engaging projection 22 of the earth inductor 3 is fitted into the engaging hole portion 7 of the earth inductor mounting portion 2c as shown in FIG. That is, by fitting the protrusions 22 into the positioning notches 7a on both sides of the engaging hole 7, the ground inductor 3 is positioned and fixed so as not to move with respect to the ground terminal component 2. When the protrusion 22 is fitted into the engaging hole 7, the rubber cover 24 is locally broken to expose the protrusion 22, and the removal preventing claw 22a of the protrusion 22 is inserted into the engaging hole as shown in FIG. The ground inductor 3 is held so that it is not caught on both sides of the part 7 and the ground inductor 3 does not move or fall off from the part 2. Even if the cover 24 is not broken, there is no problem in engaging the protrusions 22.

One lead wire 9a of the winding 9 of the earth inductor 3 is inserted into the wire arrangement groove 8a of the internal terminal portion 8 formed in the earth inductor mounting portion 2c as shown in FIG. By crimping the internal terminal portion 8 in the direction of arrow P of 6, the internal terminal portion 8 is mechanically clamped. Similarly, the other lead wire 9b of the winding wire 9 is inserted into the wire arranging groove 10a of the internal terminal portion 10 of the bent piece portion 11 integrally formed with the rear ground terminal portion 2b as shown in FIG. The internal terminal portion 10 is mechanically clamped by caulking the internal terminal portion 10. In this way, the lead wires 9a, 9b are soldered to the internal terminal portions 8, 10 with the lead wires 9a, 9b mechanically held on the side of the ground terminal component 2.

After the positioning and fixing of the ground inductor 3 to the ground terminal component 2 and the soldering of the lead wires 9a and 9b to the internal terminal portions 8 and 10 are completed, the pair of the input terminal component 1 and the ground terminal component 2 are The molded body 4 made of the thermoplastic resin is formed by integrally molding the thermoplastic resin while appropriately maintaining the mutual positional relationship.

As can be seen from FIG. 2, the frame-shaped portion 12 around the engaging hole portion 7 connects the front terminal portion 2 a and the rear terminal portion 2 b of the ground terminal component 2, so that the earth terminal component 2 is connected to the earth terminal component 2 as it is. The winding 9 of the inductor 3 is short-circuited at the frame-shaped portion 12. Therefore, after integrally molding with the thermoplastic resin, a part of the frame-shaped portion 12 of the ground terminal component 2 is cut away as shown by the phantom line Z in FIG. 2 so that the ground terminal component 2 and the ground inductor mounting portion 2c are attached. The front side terminal portion 2a and the rear side terminal portion 2b, which are integrally held, are separated. As a result, the earth inductor mounting portion 2c integrated with the front terminal portion 2a and the rear terminal portion 2b are connected by the earth inductor 3.

As shown in FIG. 7, the ground terminal component 2 in a developed state is punched out from one metal plate, and the pair of terminal piece side portions 30a and 30b forming the front ground terminal portion 2a are dotted lines. The front terminal portion 2a having a desired thickness can be formed by bending at Q and the two terminals are overlapped, and the bending piece portion 11 can be bent at a dotted line R perpendicularly to the rear terminal portion 2b. Similarly, with respect to the input terminal component 1, the pair of terminal piece side portions forming the front power supply input terminal portion 1a can be bent to form a front power supply input terminal portion 1a having a desired thickness by stacking two sheets. . If each terminal part is manufactured in this way, it is possible to facilitate the manufacture of each terminal part and reduce the manufacturing cost.

Further, as shown in FIG. 7, by making the shoulder portion 12a of the frame-shaped portion 12 of the earth terminal component 2 round, the shoulder component 12a of the frame-shaped portion 12 hits the resin molding die and The inconvenience of damaging the mold and shortening the life of the mold can be prevented.

If the AC inlet filter connector shown in the first embodiment is used in an electronic device, the earth inductor 3 is installed in the earth line between the AC power source (commercial power supply) side and the electronic device. It can be inserted, and the inconvenience that noise flows out to the outside (commercial power supply side) through the ground line or flows into the inside (electronic device side) can be eliminated.

According to the configuration of the first embodiment, the following effects can be obtained. A pair of the input terminal component 1, the ground terminal component 2, and the ground inductor 3 are integrally molded with insulating resin, and a molded body 4 having a front concave portion 5 and a mounting brim portion 6 for fitting with the plug with the insulating resin is configured. Therefore, compared to the conventional general structure in which a separate case is connected to the connector and the filter element is housed in this case, the manufacturing and assembly work is simpler, and a resin molded product when integrally molded with insulating resin. It is possible to achieve miniaturization by making the external dimensions of the necessary minimum. By pressing the locking projection 22 of the ground inductor 3 into the engaging hole 7 of the ground terminal component 2, the ground inductor 3 can be reliably positioned and fixed with respect to the ground terminal component 2, and the ground inductor can be impacted by the resin molding. 3 can be prevented from moving and becoming a defective product. The earth inductor 3 is constructed by housing an annular magnetic core 20 of ferrite or the like in a core case 21 and winding a winding 9 around a core component 25 covered with a rubber cover 24 having elasticity. The stress applied to the magnetic core 20 caused by the resin contraction can be relaxed, and the characteristic (permeability) of the magnetic core 20 can be prevented from deteriorating and the characteristic variation can be prevented. The lead wires 9a and 9b of the winding 9 of the earth inductor 3 are inserted into the wire arranging grooves 8a and 10a of the internal terminal portions 8 and 10 on the side of the ground terminal component, and the inner terminal portions 8 and 10 are caulked to lead wire 9a, 9b is mechanically held, and the soldering operation can be performed in this state. Therefore, the lead wires 9a and 9b are securely connected to the internal terminal portions 8 and 10, and the workability during assembly can be improved.

Although the AC inlet filter connector of the first embodiment has a structure suitable for mounting on the housing of electronic equipment, it has a structure suitable for mounting on the printed circuit board of electronic equipment. A second embodiment of this AC inlet filter connector will be described with reference to FIGS.

As shown in FIGS. 8 and 12, the AC inlet filter connector according to the second embodiment includes a pair of input terminal parts 31, a ground terminal part 32, and an earth inductor 3 as a filter element. The three are integrally molded with a thermoplastic resin, which is an insulating resin. That is, the molded body 34 made of a thermoplastic resin has a front concave portion 35 for fitting with a plug, a mounting flange portion 36a, and a mounting flange portion 36b perpendicular to the front recess portion 35a. Mounting holes (or protrusions such as hooks) 36c and 36d are formed in the mounting flange portions 36a and 36b, respectively. In the recess 35, the front AC power input terminal portion 31a of the pair of input terminal components 31 and the front ground terminal portion 32a of the ground terminal component 32 are fixed so as to project. Further, the input terminal part 31 is bent at a right angle inside as shown in FIG. 9, and the rear side input terminal portion 31b formed at the other end is pulled out to the bottom surface side of the molded body 34. Further, the ground terminal component 32 is also bent at a right angle inside as shown in FIG. 8, and the rear ground terminal portions 32b and 32c formed at the other ends are pulled out to the bottom surface side and the upper surface side of the molded body 34 ( However, as described later, the rear ground terminal portions 32a and 32b are separated from the front ground terminal portion 32a).

The portion of the ground terminal component 32 embedded between the front ground terminal portion 32 a and the rear ground terminal portions 32 a, 32 b in the molded body 34 is a ground inductor mounting portion 32 d, and the ground inductor 3 Is formed with an engaging hole portion 37 for mounting. As shown in FIG. 13 showing the ground terminal component 32 in a developed state, positioning notches 37a are formed on both sides of the engaging hole 37. Further, the earth inductor mounting portion 32d has an inner terminal portion 38 having a wire arranging groove 38a for inserting the lead wire 9a of the winding 9 of the earth inductor 3 as shown in FIG. As described above, the inner terminal portion 40 having the wire arranging groove 40a for inserting the lead wire 9b of the winding 9 is provided at the connecting portion of the rear side ground terminal portions 32b and 32c. The thickness of the internal terminal portion 38 is thin in consideration of soldering of the lead wire 9a.

The rear input terminal portion 31b and the rear earth terminal portion 32b drawn out to the bottom surface side of the molded body 34 are formed in a pin terminal shape, and the rear side drawn out to the upper surface of the molded body 34. The ground terminal portion 32c has a lug terminal shape or the like.

One lead wire 9a of the winding 9 of the earth inductor 3 configured similarly to the first embodiment is inserted into the line arrangement groove 38a of the internal terminal portion 38 formed in the earth inductor mounting portion 32d. The internal terminal portion 38 is mechanically clamped by caulking the internal terminal portion 38. Similarly, the other lead wire 9b of the winding wire 9 is inserted in the wire arranging groove 40a of the internal terminal portion 40 formed at the connection portion of the rear side ground terminal portions 32b and 32c, and the internal terminal portion 40 is not connected. It is mechanically clamped by the internal terminal portion 40 by being tightened. In this way, the lead wires 9a, 9b are soldered to the internal terminal portions 38, 40 while the lead wires 9a, 9b are mechanically held on the side of the ground terminal component 32.

After the positioning and fixing of the ground inductor 3 to the ground terminal component 32 and the soldering of the lead wires 9 a and 9 b to the internal terminal portions 38 and 40 are completed, the pair of the input terminal component 31 and the ground terminal component 32 are While the mutual positional relationship is properly maintained, the thermoplastic resin is integrally molded to form a molded body 34 of the thermoplastic resin.

As can be seen from FIG. 11, the frame-shaped portion 42 connecting the ground inductor mounting portion 32d and the rear ground terminal portions 32b and 32c is connected to the front terminal portion 32a and the rear terminal portion of the ground terminal component 32. Since the portions 32b and 32c are in communication with each other, the winding 9 of the ground inductor 3 is short-circuited at the frame-shaped portion 42 as it is. Therefore, after integrally molding with the thermoplastic resin, a part of the frame-shaped portion 42 of the ground terminal component 32 is cut out as shown by the phantom line Z in FIGS. 11 and 12, and the ground terminal component 32 is attached to the ground inductor component. The front terminal portion 32a integrally having the portion 32d and the rear terminal portions 32b and 32c are separated. As a result, the ground inductor mounting portion 32d integrated with the front terminal portion 32a and the rear terminal portions 32b and 32c are connected by the ground inductor 3.

As shown in FIG. 13, the ground terminal component 32 in a developed state is punched out from a single metal plate, and the pair of terminal-side portions 50a and 50b forming the front ground terminal portion 32a are indicated by dotted lines S. The front terminal 32a having a desired thickness may be formed by folding and folding the two terminals, and the rear terminal portions 32b and 32c may be bent vertically with respect to the earth inductor mounting portion 32d at a dotted line T. it can. Similarly, with respect to the input terminal part 31, the front input terminal portion 31a having a desired thickness can be formed by bending a pair of terminal pieces on the side of the front power input terminal portion 31a by folding them. If each terminal component is manufactured in this manner, the manufacturing of each terminal component can be facilitated and the manufacturing cost can be reduced.

The AC inlet filter connector of the second embodiment can be used by fixing it to the printed board with screws using the mounting holes 36c or 36d of the mounting collar portion 36a or 36b. The rear input terminal portion 31b and the rear ground terminal portion 32b drawn out from the bottom surface side of 34 can be directly connected to the conductor pattern on the printed circuit board side. The other operational effects are the same as those of the first embodiment described above.

FIG. 14 shows a third embodiment of the present invention. In this case, the molded body 44 of the AC inlet filter connector has a positioning projection 45 on its bottom surface instead of the mounting flange. The internal structure other than the molded body 44 is the same as that of the second embodiment described above. In this case, the molded body 44 can be positioned on the printed circuit board 60 by fitting the positioning convex portion 45 on the molded body side into the hole 61 formed in the printed circuit board 60. Even when the screwing is omitted, when the plug is fitted into the recess 35 of the molded body 44, an excessive force is applied to the conductor pattern on the printed circuit board 60 side to which the rear input terminal portion 31b and the rear ground terminal portion 32b are connected. Can be prevented.

Note that, in the third embodiment of FIG. 14, the lug terminal-shaped rear side terminal portion 32c may be drawn out to the rear surface side of the molded body 44 as indicated by an imaginary line.

Although the embodiment of the present invention has been described above, it is obvious to those skilled in the art that the present invention is not limited to this and various modifications and changes can be made within the scope of the claims. Let's do it.

[0035]

[Effect of device]

 As described above, according to the AC inlet filter connector of the present invention, since the ground inductor is reliably positioned and fixed by the ground terminal component, the ground inductor may move due to the impact of the resin molding and become a defective product. In addition, the earth inductor is constructed by winding the winding around a core part that houses the annular magnetic core in the core case and covers the elastic rubber cover. The stress applied to the magnetic core caused by resin shrinkage during molding can be relaxed, and the deterioration of the characteristics of the magnetic core and the occurrence of variations in characteristics can be prevented. Furthermore, compared to the conventional general structure in which the filter element is housed in the case integrated with the connector, the manufacturing and assembly work can be simplified, mass productivity can be improved, and the insulating resin can be used. It is possible to reduce the size by minimizing the external dimensions of the resin molded product when integrally molded.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an AC inlet filter connector according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the first embodiment as seen from the bottom side.

FIG. 3 is an exploded perspective view of a core component used in the first embodiment.

FIG. 4 is a perspective view of the same.

FIG. 5 is a cross-sectional view of essential parts showing a state in which a ground inductor is mounted on a ground terminal component in the first embodiment.

FIG. 6 is a partially enlarged view showing an internal terminal portion formed on the ground terminal component in the first embodiment.

FIG. 7 is a bottom view showing the ground terminal component in a developed state used in the first embodiment.

FIG. 8 is a side sectional view mainly showing an earth terminal component and an earth inductor in the second embodiment of the present invention.

FIG. 9 is a side sectional view mainly showing the input terminal component.

FIG. 10 is a sectional view of the second embodiment viewed from the upper surface side.

FIG. 11 is a cross-sectional view of the same.

FIG. 12 is a front view showing the outer appearance of the second embodiment.

FIG. 13 is a plan view showing a ground terminal component in a developed state used in the second embodiment.

FIG. 14 is a side sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 1,31 Input terminal parts 1a, 31a Front side power source input terminal part 1b, 31b Rear side input terminal part 2,32 Ground terminal parts 2a, 32a Front side ground terminal parts 2b, 32b, 32c Rear side ground terminal part 2c, 32d Ground inductor Mounting part 3 Earth inductor 4,34,44 Molded body 5,35 Recessed part 7,37 Engagement hole part 8,10,38,40 Internal terminal part 8a, 10a, 38a, 40a Wire arrangement groove 9 Winding 9a, 9b Drawer Line 11 Bending piece 20 Annular core 21 Core case 22 Locking protrusion 24 Rubber cover 25 Core component 45 Positioning protrusion

Claims (5)

[Scope of utility model registration request] 1. An AC inlet filter connector including a pair of input terminal parts, a ground terminal part and a ground inductor, wherein the input terminal parts have a front input terminal part and a rear input terminal part, and the ground terminal. The component has a front ground terminal portion, a ground inductor mounting portion, and a rear ground terminal portion separated from the ground inductor mounting portion, and an engaging hole portion is formed in the ground inductor mounting portion, and the ground inductor is An annular magnetic core is housed in a core case formed with a locking projection, and a winding is wound around a core part covered with a rubber cover, and the locking projection is formed in the engaging hole. After fitting, the earth inductor is positioned and fixed to the earth inductor mounting part and integrally molded with insulating resin. AC inlet filter connector, characterized in that it comprises a structure obtained by projecting the terminal portion and the front ground terminal portions. 2. The AC inlet filter connector according to claim 1, wherein each of the front input terminal portion and the front ground terminal portion is formed by bending one metal plate so that two metal sheets are stacked. 3. A portion integrated with the ground inductor mounting portion and the rear ground terminal portion has an internal terminal portion having a wire arrangement groove into which a lead wire of the winding is inserted. The AC inlet filter connector described. 4. The AC inlet filter connector according to claim 1, wherein the rear input terminal portion and the rear ground terminal portion are drawn out from the bottom surface of the resin molded body. 5. The AC inlet filter connector according to claim 4, wherein a positioning protrusion is formed on the bottom surface of the resin molded body.