JP6268591B2 - Filter element built-in connector - Google Patents

Description

  The present invention relates to a filter element built-in connector.

  Patent Document 1 discloses a filter element built-in connector in which a filter element such as a capacitor and a coil is accommodated in a housing, and the filter element is connected to a terminal fitting attached to the housing and a ground member.

Japanese Patent No. 45524318

  In this filter element built-in connector, a connection portion connected to the ground portion of the ground member has a form protruding to the outside of the housing. The protruding direction of the ground member is opposite to the direction in which the electric wire connected to the terminal fitting is led out. Therefore, a space for arranging the conductive path and a space for arranging the ground member are required around the housing.

  The present invention has been completed based on the above situation, and aims to save space.

The filter element built-in connector of the present invention,
A housing having an element accommodating portion;
A filter element accommodated in the element accommodating portion;
A pair of terminal accommodating portions formed on the housing and projecting in the same direction from the element accommodating portion;
A pair of terminal fittings housed in the pair of terminal housing portions and connected to the filter element;
A grounding member attached to the housing and connected to the filter element;
An earth connection portion connected to a ground portion of the earth member is disposed between the pair of terminal accommodating portions,
The filter element includes a pair of capacitors, and a conductive shielding plate connected to the ground member is provided between the pair of capacitors .

Since the space between the pair of terminal accommodating portions protruding from the element accommodating portion is used as a space for arranging the ground connection portion, it does not become a dead space. Therefore, according to the present invention, space saving can be achieved .
In the filter element built-in connector of the present invention, the filter element includes a pair of capacitors, and a conductive shielding plate connected to a ground member is provided between the pair of capacitors. According to this configuration, since the conductive shielding plate connected to the ground member is interposed between the pair of capacitors, electric field coupling and generation of coupling capacitance associated with electric field coupling can be generated even if the capacitors are not separated from each other. Can be suppressed.

Plan view of the filter element built-in connector of Example 1 Sectional view showing the state where the filter element built-in connector is connected to the grounding section

(1) In the filter element built-in connector of the present invention , the conductive shielding plate may be formed integrally with the ground member. According to this configuration, a grounding function for the capacitor can be imparted to the conductive shielding plate for suppressing electric field coupling.
(2) The connector with a built-in filter element according to the present invention includes a coil in which the filter element is disposed with its axis line oriented substantially parallel to the direction in which the pair of terminal accommodating portions are arranged, and both ends of the conductive wire of the coil May be connected to the pair of terminal fittings. According to this configuration, if both ends of the conducting wire are connected to the pair of terminal fittings in the vicinity of both ends of the coil, the ground connection portion is arranged in the pair of terminal accommodating portions while suppressing the length of the conducting wire to the minimum necessary. Can be secured.

<Example 1>
Embodiment 1 of the present invention will be described below with reference to FIGS. In the following description, for the front-rear direction, the left side of FIGS. For the vertical direction, the directions shown in FIG.

<Filter element built-in connector A>
The filter element built-in connector A according to the first embodiment includes a housing 10, a filter element 20, a pair of terminal fittings 30, and a ground member 40. Two harness side connectors (not shown) constituting the wire harness are fitted to the pair of terminal fittings 30. The filter element built-in connector A is configured to remove noise from the electric wires (not shown) constituting the wire harness by connecting the ground member 40 to the ground portion 50 provided in the body of the automobile. It has become.

<Housing 10>
The housing 10 is made of synthetic resin, and is configured by assembling the housing main body 11 and the cover 17. The housing body 11 is configured by integrally forming a box-shaped element housing portion 12 having an open upper surface and a pair of left and right terminal housing portions 13 protruding forward from the front surface of the element body. A cutout portion 15 having a substantially T-shape in plan view is formed in the bottom wall portion 14 of the element housing portion 12 so as to penetrate vertically. The opening on the upper surface of the element housing portion 12 is closed by the cover 17.

  A pair of terminal accommodating part 13 has comprised the food | hood shape (square tube shape) open | released ahead. The pair of terminal accommodating portions 13 are arranged at intervals in the left-right direction, and project forward from the left and right end portions of the element accommodating portion 12. A functional space 16 sandwiched between a pair of terminal accommodating portions 13 is formed in front of the element accommodating portion 12. One terminal accommodating part 13 is adapted to be fitted with an input-side harness-side connector (not shown) constituting the wire harness. The other terminal accommodating portion 13 is adapted to be fitted with an output-side harness-side connector (not shown) constituting the wire harness.

<Filter element 20>
The filter element 20 includes a single coil 21 and a pair of left and right capacitors 24. The coil 21 includes a cylindrical magnetic core 22 whose axis is directed in the left-right direction, and a single conductive wire 23 that is wound around the magnetic core 22 in a spiral shape. The coil 21 is accommodated in the element accommodating portion 12 and disposed at the rear end portion of the element accommodating portion 12. Both end portions of the conducting wire 23 are led forward along the left and right inner wall surfaces of the element housing portion 12. The pair of capacitors 24 constitutes a π-type filter circuit together with the coil 21, and capacitors 24 having the same type and capacity are used. Each of the capacitors 24 is a film capacitor 24, and includes a capacitor body 25 having a substantially block shape, and a pair of positive and negative lead wires 26A and 26B led out from the upper surface of the capacitor body 25.

<Terminal fitting 30>
The pair of terminal fittings 30 include a tab-shaped harness connection portion 31 and a flat-plate element connection portion 32 that is continuous with the rear end portion of the harness connection portion 31. That is, the terminal fitting 30 is a tab-shaped bus bar terminal. The pair of terminal fittings 30 are integrated with the housing body 11 by insert molding in the process of molding the housing body 11. The front harness connecting portion 31 of the terminal fitting 30 is accommodated in the terminal accommodating portion 13. When an input side harness side connector (not shown) is fitted into the input side terminal accommodating portion 13, the input side terminal (not shown) of the wire harness is connected to the harness connecting portion 31 of the input side terminal fitting 30. . Further, when the output-side harness connector (not shown) is fitted into the output-side terminal accommodating portion 13, the output-side terminal (not shown) of the wire harness is connected to the harness connection portion 31 of the output-side terminal fitting 30. Is done.

The element connection portion 32 of the terminal fitting 30 is disposed in the element housing portion 12 . A pair of terminal fittings 30, because it is located at the left and right ends of the housing 10, a pair of element connection portions 32 are also arranged divided into right and left end portions of the front end portion of the element housing portion 12. The positions of the pair of element connection portions 32 are positions corresponding to both end portions of the coil 21 in the axial direction of the coil 21, and positions corresponding to the lead wires 26 </ b> A on the positive side of the left and right capacitors 24. Then, the one of the element connection portion 32, and one end portion of the guide wire 23 of the coil 21, and the lead wire 26A of the positive electrode side of one of the capacitors 24 are connected together by solder 47. Further, the other end portion of the conducting wire 23 of the coil 21 and the lead wire 26 A on the positive side of the other capacitor 24 are connected to the other element connection portion 32 together by solder 47.

<Earth member 40>
The ground member 40 is made of a conductive plate material such as a copper alloy, and has a plate-like main body 41 having a horizontal flat plate shape, and a flat plate-like first conductive shielding plate 45 arranged with the plate surface directed in the vertical direction. And the second conductive shielding plate 46 arranged with the plate surface directed in the vertical direction. The front end side region of the plate-like main body 41 is an earth connection portion 42 for connecting to the grounding portion 50, and the rear end side region of the plate-like main body 41 is an assembly portion 44 that is assembled to the housing 10. Yes. The width dimension of the ground connection portion 42 is smaller than the width dimension of the functional space 16 between the pair of terminal accommodating portions 13. A circular through hole 43 is formed in the ground connection portion 42 in a form penetrating in the vertical direction.

  The first conductive shielding plate 45 is disposed at the center in the left-right direction at the front end of the assembly portion 44. The first conductive shielding plate 45 is fixed so as to be conductive by welding or the like in a form rising at a right angle to the upper surface of the assembly portion 44. The upper end edge of the fixed first conductive shielding plate 45 extends in the front-rear direction. The second conductive shielding plate 46 is disposed in the vicinity of the rear of the first conductive shielding plate 45 in the assembling portion 44 and at the center in the left-right direction.

  The second conductive shielding plate 46 is fixed so as to be conductive by welding or the like in a form that rises at a right angle to the upper surface of the assembly portion 44. The upper end edge of the fixed first conductive shielding plate 45 has a direction extending in the left-right direction (that is, a direction perpendicular to the first conductive shielding plate 45). That is, in the plan view, the first conductive shielding plate 45 and the second year are arranged so as to be substantially T-shaped.

<Operation and Effect of Example 1>
Similarly to the pair of terminal fittings 30, the ground member 40 is integrated with the element housing portion 12 (housing 10) by insert molding. In a state where the grounding member 40 are integrated in the housing 10 in close contact attaching portions 4 4 and the lower surface of the bottom wall portion 14 of the element accommodating portion 12, a first conductive shield plate 45 second conductive shield plates 46 However, it passes through the notch 15 and is accommodated in the element accommodating portion 12. The inside of the element accommodating portion 12 is divided into approximately three regions by a first conductive shielding plate 45 and a second conductive shielding plate 46. The ground connection portion 42 is disposed at the lower end portion in the functional space 16 between the pair of terminal accommodating portions 13. In addition, the lower surface of the plate-like main body 41 (the ground connection portion 42 and the assembly portion 44) is flush with the lower surface of the housing 10.

  After the terminal fitting 30 and the ground member 40 are integrated with the housing 10, the filter element 20 is assembled in the following procedure. First, the coil 21 is disposed behind the second conductive shielding plate 46 and both ends of the conductive wire 23 are led out forward. Next, in order to fix the coil 21 to the housing body 11, an epoxy resin 48 is filled between the coil 21 and the second conductive shielding plate 46. At this time, the conductive wire 23 of the coil 21 and the second conductive shielding plate 46 are prevented from contacting each other. When the epoxy resin 48 is cured, the coil 21 is fixed to the bottom wall portion 14 of the element housing portion 12.

  Thereafter, the pair of capacitors 24 are distributed and accommodated in two spaces in front of the second conductive shielding plate 46 and sandwiching the first conductive shielding plate 45. That is, the pair of capacitors 24 are arranged so as to be arranged substantially parallel to the axial direction of the coil 21. Then, the wiring work for forming the π-type filter circuit is performed. First, the lead wire 26 </ b> A on the positive electrode side of the capacitor 24 and one end portion of the conductive wire 23 of the coil 21 are connected to the element connection portions 32 of the terminal fittings 30 by solder 47. Further, the lead wire 26 B on the negative electrode side of both the left and right capacitors 24 is connected to the side surface of the first conductive shielding plate 45 by solder 47. Thereby, the connection of the π-type filter circuit is completed. Finally, if the opening of the nourishing surface of the element housing portion 12 is closed with the cover 17, the assembly of the filter element built-in connector A is completed.

  The filter element built-in connector A that has been assembled is connected to the ground portion 50. When connecting, a fastening member 55 is used. The fastening member 55 is composed of two parts, a nut 56 and a bolt 58. The nut 56 is fixed to the back surface of the grounding portion 50 by welding. The fixed nut 56 is disposed so that the female screw hole 57 is concentric with the guide hole 51 formed in the grounding portion 50.

  The bolt 58 includes a male screw part 59 and a head 60 integrally formed on the upper end part of the male screw part 59. The male screw portion 59 is screwed into the female screw hole 57. The head 60 is formed with a fitting hole 61 having a hexagonal cross section with a concave upper end surface. A hexagon wrench (not shown) is fitted into the fitting hole 61. The lower surface of the head 60 is in close contact with the surface of the ground member 40 when the male screw portion 59 is screwed into the female screw hole 57 and tightened, and the seat surface 62 sandwiches the ground member 40 vertically with the ground portion 50. It has become. The seat surface 62 is a flat surface parallel to the upper surface of the ground member 40.

  When connecting the ground member 40 to the ground portion 50, first, the ground member 40 is placed on the upper surface of the ground portion 50, and the through hole 43 is aligned with the guide hole 51 of the ground portion 50. Then, the male screw portion 59 of the bolt 58 is inserted through the through hole 43 and the guide hole 51 from above the ground connection portion 42. Thereafter, a hexagon wrench (not shown) is fitted into the fitting hole 61 of the head 60 and the bolt 58 is rotated, so that the male screw portion 59 is screwed into the female screw hole 57. In a state where the screwing of the bolt 58 is completed, the grounding member 40 is sandwiched between the grounding portion 50 and the head 60 of the bolt 58. Thereby, the ground member 40 is connected to the ground portion 50 so as to be conductive.

  As described above, the filter element built-in connector A according to the first embodiment is formed in the housing 10 having the element accommodating portion 12, the filter element 20 accommodated in the element accommodating portion 12, and the housing 10. A pair of terminal accommodating portions 13 formed to protrude in the same direction from each other, a pair of terminal fittings 30 accommodated in the pair of terminal accommodating portions 13 and connected to the filter element 20, and attached to the housing 10. And an earth member 40 connected to the element 20.

  The ground connection portion 42 connected to the ground portion 50 of the ground member 40 is disposed in the functional space 16 formed between the pair of terminal accommodating portions 13. As described above, since the functional space 16 sandwiched between the pair of terminal accommodating portions 13 protruding from the element accommodating portion 12 is used as a space for arranging the ground connection portion 42, the functional space 16 is a dead space. I'm done. Therefore, if the filter element built-in connector A of the first embodiment is used, space saving can be achieved.

  In addition, the filter element built-in connector A of the first embodiment includes a coil 21 in which the filter element 20 is disposed with its axis line oriented substantially parallel to the arrangement direction of the pair of terminal accommodating portions 13, and a pair of terminal fittings. 30 is arrange | positioned so as to correspond to the both ends in the axial direction of the coil 21. Both ends of the conductive wire 23 of the coil 21 are connected to a pair of terminal fittings 30. According to this configuration, since both end portions of the conducting wire 23 are connected to the pair of terminal fittings 30 in the vicinity of both end portions of the coil 21, the pair of terminal accommodating portions 13 is suppressed while keeping the length of the conducting wire 23 to the minimum necessary. The space | interval (functional space 16) for arrange | positioning the earth connection part 42 to the 1st was able to be ensured.

  Further, in the filter element built-in connector A of the first embodiment, the filter element 20 includes a pair of capacitors 24 constituting a π-type filter circuit, and a first connected to the ground member 40 between the pair of capacitors 24. One conductive shielding plate 45 is provided. According to this configuration, since the conductive shielding plate connected to the ground member 40 is interposed between the pair of capacitors 24, the coupling capacitance associated with the electric field coupling and the electric field coupling even if the capacitors 24 are not separated from each other. Can be suppressed.

  In addition, since the first conductive shielding plate 45 is formed integrally with the ground member 40, a grounding function for the capacitor 24 is given to the first conductive shielding plate 45 that suppresses electric field coupling between the capacitors 24. Can do. The first conductive shielding plate 45 is connected to the lead wires 26B on the negative side of the left and right capacitors 24, whereby the capacitors 24 are grounded together via the first conductive shielding plate 45. Is realized. Therefore, the configuration is simplified as compared with the case where a grounding unit is separately provided for each capacitor 24.

  Further, a second conductive shielding plate 46 that is integral with the ground member 40 is interposed between the coil 21 and each capacitor 24. Thereby, unintended electric field coupling between the coil 21 and the capacitor 24 can be suppressed, and the heat generation of the coil 21 hardly reaches the capacitor 24. Therefore, it is possible to prevent the characteristic deterioration accompanying the temperature rise of the capacitor 24.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the ground connection portion is disposed outside the housing, but the ground connection portion may be accommodated inside the housing.
(2) In the above-described embodiment, the filter element constitutes a π-type filter circuit, but the filter element may constitute a filter circuit other than the π-type.
(3) In the above-described embodiment, the coil is arranged with its axis line oriented substantially parallel to the direction in which the pair of terminal accommodating portions are arranged, but the coil is oriented in a direction intersecting with the direction in which the pair of terminal accommodating portions are arranged. May be arranged.
(4) In the above embodiment, the conductive shielding plate is interposed between the pair of capacitors. However, the conductive shielding plate may not be interposed between the pair of capacitors.
(5) In the above embodiment, the conductive shielding plate is integrated by bringing it into direct contact with the ground member. However, the conductive shielding plate is disposed in a non-contact state with the ground member. And the ground member may be connected by an electric wire or the like.
(6) In the above embodiment, the conductive shield plate, which is a separate part from the ground member, is fixed and integrated with the ground member. However, the conductive shield plate is bent or cut and raised, etc. May be formed integrally.
(7) In the above embodiment, the pair of terminal accommodating portions (terminal fittings) are arranged at positions corresponding to both end portions of the coil in the axial direction of the coil, but the pair of terminal accommodating portions are arranged in the axial direction of the coil. You may arrange | position in the position corresponding to the edge part of a coil.
(8) In the above embodiment, the capacitor is a film capacitor, but the capacitor may be an electrolytic capacitor or a ceramic capacitor.
(9) In the above embodiment, a capacitor having a lead wire is used, but the capacitor may not have a lead wire.
(10) In the above-described embodiment, the pair of capacitors are arranged in parallel with the axial direction of the coil. However, the pair of capacitors may be arranged in a direction intersecting with the axial direction of the coil. In this case, the arrangement may be such that a pair of capacitors sandwich the coil.
(11) In the above embodiment, the terminal fitting is a tab-shaped bus bar terminal, but it may be a female terminal fitting having a rectangular tube-shaped connecting portion.
(12) In the above embodiment, the ground connection portion is directly connected to the ground portion. However, the ground connection portion is connected to the electric wire constituting the earth circuit, and is connected to the ground portion via this electric wire. Also good.
(13) The connection form by soldering in the above embodiment can be changed to laser welding, resistance welding, or the like.

DESCRIPTION OF SYMBOLS A ... Connector with built-in filter element 10 ... Housing 12 ... Element accommodating part 13 ... Terminal accommodating part 20 ... Filter element 21 ... Coil 23 ... Conductor 24 ... Capacitor 30 ... Terminal metal fitting 40 ... Grounding member 42 ... Ground connection part 45 ... 1st electroconductivity Conductive shield (conductive shield)
50 ... Grounding part

Claims (2)

A housing having an element accommodating portion;
A filter element accommodated in the element accommodating portion;
A pair of terminal accommodating portions formed on the housing and projecting in the same direction from the element accommodating portion;
A pair of terminal fittings housed in the pair of terminal housing portions and connected to the filter element;
A grounding member attached to the housing and connected to the filter element;
An earth connection portion connected to a ground portion of the earth member is disposed between the pair of terminal accommodating portions,
The filter element built-in connector, wherein the filter element includes a pair of capacitors, and a conductive shielding plate connected to the ground member is provided between the pair of capacitors . 2. The filter element built-in connector according to claim 1, wherein the conductive shielding plate is formed integrally with the ground member .

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