JP2006202573A - Shield connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance shielding performance by providing a noise absorbing means and making it efficiently absorb noise. <P>SOLUTION: A terminal fitting 30 in a housing 10 is surrounded by a shield shell 20 to regulate leakage of noise generated from the terminal fitting 30 to the outside of the housing 10. The noise absorbing means 28 to enhance the absorption factor of noise in the shield shell 20 is provided in the shield shell 20 by making its inner surface recessed. Thereby, since noise generated from the terminal fitting 30 is efficiently absorbed in the noise absorbing means 28, shielding performance of the shield shell 20 is enhanced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shield connector.

As a shield connector, the terminal fitting is housed in a synthetic resin housing, the terminal fitting is surrounded by a metal cylindrical shield shell assembled to the housing, and the noise emitted from the terminal fitting is absorbed by the shield shell. There is one that prevents leakage of noise to the outside of the housing. In addition, what is described in patent document 1 etc. is known as a shield connector.
JP 2002-319458 A

As the shield connector, the shield shell is not exposed to the outer surface of the housing, that is, the housing has a double structure of the inner housing and the outer housing, and is in a cylindrical housing space provided between the inner housing and the outer housing. There is a structure to insert a shield shell.
In such a structure, in order to avoid interference with the connecting portion that connects the inner housing and the outer housing, it is inevitable to form a notch in the shield shell. However, when a cutout is formed in the shield shell, there is a concern that noise emitted from the terminal fitting leaks out of the housing through the cutout.
The present invention has been completed based on the above circumstances, and an object thereof is to improve the shielding performance.

  As means for achieving the above object, the invention of claim 1 is characterized in that the terminal fitting is housed in a synthetic resin housing, and the terminal fitting is provided by a cylindrical metal shield shell provided in the housing. By surrounding the shield connector, the noise generated from the terminal fitting is restricted from leaking out of the housing.In the shield shell, by making the inner surface of the shield shell uneven, the shield shell It is characterized in that noise absorbing means for improving the noise absorption rate is provided.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the noise absorbing means is formed by forming a plurality of recesses on the inner surface of the shield shell.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the noise absorbing means is configured by forming a plurality of convex portions on the inner surface of the shield shell.

  The invention of claim 4 is characterized in that, in the invention described in claim 3, the protruding end of the convex portion is pointed.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the housing includes an inner housing that accommodates the terminal fitting and an outer housing that surrounds the inner housing. The shield shell is formed with a notch, and the shield shell is inserted into the gap between the inner housing and the outer housing while fitting the notch into the connecting portion. The shield connector is characterized in that the noise absorbing means is disposed at a position opposite to the notch with the terminal fitting interposed therebetween.

<Invention of Claim 1>
Since noise generated from the terminal fitting is efficiently absorbed by the noise absorbing means, the shield performance of the shield shell is improved.

<Invention of Claim 2>
By forming the plurality of recesses on the inner surface of the shield shell, the noise absorption efficiency is improved as compared with the case where the inner surface of the shield shell is flat.

<Invention of Claim 3>
By forming the plurality of convex portions on the inner surface of the shield shell, the noise absorption efficiency is improved as compared with the case where the inner surface of the shield shell is flat.

<Invention of Claim 4>
Since the protruding end of the convex portion is sharp, the noise absorption efficiency is further improved.

<Invention of Claim 5>
Since the noise absorbing means is placed on the opposite side of the notch with the terminal fitting in between, the noise generated from the terminal fitting is sucked to the opposite side of the notch, and the noise leaks from the notch. Is suppressed.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The first connector F (a shield connector which is a constituent element of the present invention) includes a housing 10, a shield shell 20, a plurality (three) of terminal fittings 30, and a lever 40. The housing 10 is made of synthetic resin, and is formed by integrally molding a rectangular block-shaped inner housing 11 and a rectangular tube-shaped outer housing 12 that surrounds the inner housing 11 over the entire circumference. The outer peripheral surface of the inner housing 11 and the inner peripheral surface of the outer housing 12 are connected to each other on the upper and lower surfaces via connecting portions 13. The connecting portion 13 has a plate shape elongated in the front-rear direction (a direction parallel to the fitting direction with the second connector 50 described later), and is provided with a pair of left and right on the upper surface and the lower surface, respectively. A rectangular cylindrical storage space 14 is formed between the outer periphery of the inner housing 11 and the inner periphery of the outer housing 12 so as to penetrate in the front-rear direction. Further, the front end surface of the inner housing 11 and the front end surface of the outer housing 12 are in a substantially flush relationship, but the rear end surface of the inner housing 11 is more forward than the rear end surface of the outer housing 12. A connection space 15 surrounded by the outer housing 12 is formed behind the inner housing 11 so as to open rearward and communicate with the accommodation space 14.

  In the inner housing 11, three terminal accommodating chambers 16 penetrating in the front-rear direction are formed. The terminal accommodating chambers 16 are arranged in the left-right direction, and the connecting portion 13 is located between the adjacent terminal accommodating chambers 16. A lance 17 is formed in each terminal accommodating chamber 16. Further, retaining protrusions (not shown) are formed on the left and right outer surfaces of the inner housing 11. A pair of support shafts 18 are formed to protrude on both the left and right outer surfaces of the outer housing 12, and relief grooves 19 are formed on the left and right side walls of the outer housing 12 so as to be linearly cut out rearward from the front edge. Yes. The relief groove 19 is for avoiding interference with a cam follower 55 described later when the connectors F and 50 are fitted.

  A shield shell 20 is assembled to the housing 10. The shield shell 20 is made of metal (for example, aluminum alloy), and has a rectangular tube shape along the inner periphery of the outer housing 12 as a whole. Specifically, by bending a horizontally long metal plate material, a pair of side plates 22L and 22R are raised at right angles from the left and right side edges of the lower surface plate 21, and the upper surface plate is parallel to the lower surface plate 21 from the upper edge of the right side plate 22R. The reinforcing plate 24 is extended to the left, and the reinforcing plate 24 extended to the right from the upper end edge of the left side plate 22L is overlapped on the upper surface of the left end edge of the upper surface plate 23.

  The left and right side plates 22L and 22R of the shield shell 20 are formed with elastic retaining pieces 25 that are cut and raised in a cantilevered manner. A pair of left and right elastic contact pieces 26 are formed on the upper surface plate 23 of the shield shell 20 so as to be positioned near the front and rear end edges, and the upper surface plate 23 is also positioned near the front and rear end edges. A pair of left and right elastic contact pieces 26 are formed. The upper surface plate 23 and the lower surface plate 21 of the shield shell 20 are respectively formed with a pair of left and right cutout portions 27 that are linearly cut backward from the front end edge thereof. The notch 27 is disposed so as to correspond to the connecting portion 13 of the housing 10.

  The shield shell 20 collectively shields the three terminal fittings 30 by collectively surrounding the three terminal fittings 30 accommodated in the housing 10. That is, the electromagnetic noise emitted from the terminal fitting 30 is shielded by the shield shell 20 so that it does not leak out of the shield shell 20. In this embodiment, noise absorbing means 28 is provided as means for improving the shielding performance of the shield shell 20. The noise absorbing means 28 is constituted by a plurality of recesses 28a formed by dimple processing on the inner surface of the lower surface plate 21, the left and right side surface plates 22L and 22R, and the upper surface plate 23. The recess 28a has a substantially spherical shape, a diameter of 1.2 mm, and a depth of 0.2 mm. Further, a part of the recesses 28 a is located almost directly below and substantially above the terminal fitting 30 accommodated in the inner housing 11 and the electric wire 33 in the outer housing 12. That is, a part of the recesses 28 a formed in the lower surface plate 21 is arranged at a position opposite to the notch portion 27 of the upper surface plate 23 with the terminal fitting 30 and the electric wire 33 interposed therebetween, and is formed in the upper surface plate 23. A part of the recesses 28 a is arranged at a position opposite to the notch portion 27 of the lower surface plate 21 with the terminal fitting 30 and the electric wire 33 interposed therebetween. The plurality of recesses 28a are arranged so as to be aligned at substantially equal intervals in the front-rear, left-right, and upper-lower directions. The arrangement pitch of the recesses 28a is 2 mm. Further, the recess 28 a is configured not to open on the outer surface of the shield shell 20.

The shield shell 20 is assembled to the housing 10 from the rear. At the time of assembly, the shield shell 20 is inserted into the connection space 15 along the inner periphery of the outer housing 12, and further inserted into the accommodation space 14 while the notch 27 is fitted to the connecting portion 13. When the shield shell 20 reaches the normal assembly position, the front end edge of the shield shell 20 abuts against the stepped stopper 12a on the inner periphery of the outer housing 12 and stops in front, and the elastic retaining piece 25 of the shield shell 20 is stopped. Is locked from the front with respect to a retaining protrusion (not shown) of the inner housing 11 and is retained so that the shield shell 20 is held in a proper assembly position with respect to the housing 10. Further, the shield shell 20 is in contact with the inner surface of the outer housing 12, and thereby the relative displacement in the vertical and horizontal directions with respect to the housing 10 is restricted. In this normally assembled state, the substantially first half portion of the shield shell 20 is located in the substantially second half region of the accommodation space 14, and the substantially second half portion of the shield shell 20 is located in the connection space 15. Further, the shield shell 20 is housed in the housing 10 (inside the outer housing 12) over the whole, that is, the shield shell 20 is not exposed on the outer surface of the housing 10.
The terminal fitting 30 is elongated in the front-rear direction as a whole, and a substantially first half portion is a rectangular tube-shaped terminal connection portion 31, a substantially second half portion is a wire connection portion 32, and a wire 33 is crimped to the wire connection portion 32. Is fixed to be conductive. The terminal fitting 30 is inserted into the terminal accommodating chamber 16 from the rear, and is held in a properly inserted position by locking a lance hole (not shown) formed in the terminal connection portion 31 to the lance 17. ing. The normally inserted terminal fitting 30 is accommodated in the inner housing 11, and the electric wire 33 extending rearward from the rear end of the terminal fitting 30 passes through the connection space 15 from the rear end face of the inner housing 11 and is connected to the outer housing 12. It is led out to the outside rear.

  The derived three electric wires 33 are collectively surrounded by a cylindrical shield member 34 formed of a braided wire obtained by braiding metal fine wires in a mesh shape, and are collectively shielded by the shield member 34. That is, the electromagnetic noise emitted from the electric wire 33 is shielded by the shield member 34 and therefore does not leak out of the shield member 34. A front end portion of the shield member 34 is fixed to the connection shell 35. The connecting shell 35 has a horizontally long cylindrical shape, and the outer periphery of the rear end portion thereof is covered with the end portion of the shield member 34, and the outer periphery of the shield member 34 is covered with the caulking ring 36, so that the caulking ring 36 is reduced in diameter. By caulking the connecting shell 35, the end portion of the shield member 34 is sandwiched between the connecting shell 35 and the caulking ring 36, so that the shield member 34 and the connecting shell 35 are fixed in a conductive and non-detachable manner. ing.

  The connection shell 35 is inserted into the connection space 15 from behind and is fitted to the inner periphery of the rear end portion of the shield shell 20. The elastic contact piece 26 at the rear end portion of the shield shell 20 is in elastic contact with the outer periphery of the connection shell 35, so that the shield member 34 can be electrically connected to the shield shell 20 through the connection shell 35 in the connection space 15. Connected. The connection shell 35 is prevented from being pulled backward by a holder 37 assembled to the housing 10.

  In a state where the shield shell 20 and the terminal fitting 30 are assembled to the housing 10, the substantially first half portion of the shield shell 20 collectively surrounds the wire connection portion 32 of the terminal fitting 30, and the substantially latter half portion of the shield shell 20 and the connection shell 35. Surrounds the three electric wires 33 in the connection space 15 together. As a result, the electromagnetic noise emitted from the terminal fitting 30 in the accommodation space 14 and the electromagnetic noise emitted from the electric wire 33 in the connection space 15 are shielded by the shield shell 20 or the connection shell 35 and are outside the housing 10. Has been prevented from leaking into.

  A lever 40 is attached to the housing 10. The lever 40 has a gate shape in which a pair of arm portions 42 are extended from the left and right end portions of the operation portion 41, and is supported rotatably by fitting the bearing hole 43 of the arm portion 42 to the support shaft 18. Has been. A cam groove 44 is formed on the inner surface of the arm portion 42.

  Similar to the first connector F, the second connector 50 has a shielding function, accommodates the front end of three L-shaped elongated pin-shaped terminals 52 in the connector housing 51, and the outer periphery of the housing 10. Is surrounded by a metal L-shaped shell 53. A fitting recess 54 is formed in the front end portion of the connector housing 51, and the front end portion of the pin-type terminal 52 is disposed in the fitting recess 54. In addition, a pair of cam followers 55 are formed to project from the left and right outer surfaces of the connector housing 51.

  The second connector 50 is fitted to the first connector F as follows. When fitting, first, the front end portion of the connector housing 51 is shallowly fitted into the housing space 14 of the first connector F, and the fitting recess 54 is shallowly fitted into the inner housing 11 so that the cam follower 55 is formed in the cam groove 44. Enter the entrance. When the lever 40 is rotated from this state, the second connector 50 is drawn to the first connector F by the cam action due to the engagement between the cam groove 44 and the cam follower 55, and both the connectors F, 50 are fitted. In a state where both the connectors F and 50 are properly fitted, the front end portion of the pin-type terminal 52 enters the inner housing 11 and is inserted into the terminal connection portion 31 of the terminal fitting 30. The metal fitting 30 is connected to be conductive. Further, the front end portion of the L-shaped shell 53 having a rectangular tube shape is fitted to the inner periphery of the front end portion of the shield shell 20, and the elastic contact piece 26 at the front end portion of the shield shell 20 is in contact with the outer surface of the L-shaped shell 53. Due to the elastic contact, the shield shell 20 and the L-shaped shell 53 are connected in a conductive manner.

  The first connector F of the present embodiment accommodates the terminal fitting 30 in a synthetic resin housing 10 and surrounds the terminal fitting 30 with a cylindrical metal shield shell 20 provided in the housing 10. Although the noise emitted from the terminal fitting 30 and the electric wire 33 is restricted from leaking out of the housing 10, the shield shell 20 is formed with a plurality of recesses 28a on the inner surface thereof, so that the shield shell Noise absorbing means 28 for improving the noise absorption rate at 20 is provided. Thereby, the noise emitted from the terminal fitting 30 and the electric wire 33 is efficiently absorbed by the noise absorbing means 28, so that the noise absorption efficiency is improved as compared with the case where the inner surface of the shield shell is flat.

  In addition, the housing 10 is configured such that an inner housing 11 that houses the terminal fitting 30 and an outer housing 12 that surrounds the inner housing 11 are integrated with each other via a connecting portion 13. The shield shell 20 is inserted into the gap between the inner housing 11 and the outer housing 12 while fitting the notch portion 27 to the connecting portion 13. As described above, in the form of the shield shell 20, there is a concern that noise emitted from the terminal fitting 30 or the electric wire 33 leaks out of the shield shell 20 through the notch 27. However, since the recess 28a, which is the noise absorbing means 28, is disposed on the opposite side of the notch 27 with the terminal fitting 30 interposed therebetween, the noise generated from the terminal fitting 30 is on the opposite side of the notch 27 ( Thus, the leakage of noise from the notch 27 is efficiently suppressed.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the noise absorbing means 28 of the shield shell 20 is configured differently from the first embodiment. Since other configurations are the same as those of the first embodiment, the same configurations are denoted by the same reference numerals, and descriptions of structures, operations, and effects are omitted.
The noise absorbing means 28 according to the second embodiment includes a plurality of lower surface plates 21, left and right side surface plates 22 </ b> L and 22 </ b> R, and an upper surface plate 23 of the shield shell 20 that are formed so as to protrude in a pyramid shape (for example, a triangular pyramid shape) toward the inner surface. It is comprised by the convex part 28b. As a method for forming the convex portion 28b, there are means such as cutting and raising. Further, the protruding end of each convex portion 28b is sharply pointed. Moreover, the dimension (length dimension) of the front-back direction of the convex part 28b is 1.2 mm, the dimension (width dimension) of the left-right direction is 1.2 mm, and a height dimension is 0.2 mm. In the second embodiment, since the plurality of convex portions 28b are formed on the inner surface of the shield shell 20, the noise absorption efficiency is improved as compared with the case where the inner surface of the shield shell is flat. Further, since the protruding end of the convex portion 28b is sharp, the noise absorption efficiency is further increased.

<Other embodiments>
The present invention is not limited to the embodiment 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, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) Although the lever type shield connector has been described in the above embodiment, the present invention can also be applied to shield connectors other than the lever type.
(2) In the above embodiment, the shield shell is assembled to the housing from the rear. However, according to the present invention, the shield shell may be assembled from the front.
(3) In the above embodiment, the shield shell is not exposed to the outer surface of the housing, but the present invention can also be applied to a configuration in which a part or all of the shield shell is exposed to the outer surface of the housing.
(4) In Embodiment 1 described above, the recess is not open to the outer surface of the shield shell. However, according to the present invention, the recess may be formed to penetrate from the inner surface of the shield shell to the outer surface.
(5) In the above embodiment, the noise absorbing means is configured by forming only one of the convex portion and the concave portion in the shield shell. However, according to the present invention, the convex portion and the concave portion may be mixed.
(6) In the above embodiment, the case where the cutout portion is formed in the shield shell has been described. However, according to the present invention, the shield shell is continuous in the circumferential direction over the entire length in the front-rear direction, that is, the cutout portion is The present invention can also be applied to a case where it is not formed.
(7) Although the shield shell is assembled to the molded housing in the above embodiment, the present invention can also be applied to a shield connector in which the shield shell is integrated with the housing by insert molding.
(8) In the above-described embodiment, the convex portion and the concave portion as the noise absorbing means may be arranged along the opening edge (side edge) of the notch portion.
(9) In the above embodiment, the convex portions and concave portions as the noise absorbing means may be arranged so that the density becomes higher as the position is closer to the terminal fitting or the electric wire.
(10) In the first embodiment, the concave portion has a substantially spherical shape. However, according to the present invention, the concave portion is not limited to the spherical shape, and may have a shape recessed in a pyramid shape or a rectangular shape.
(11) Although the convex portion has a pyramid shape in the second embodiment, according to the present invention, the convex portion is not limited to the pyramid shape, and may have a form protruding into a spherical shape or a square shape.

Exploded perspective view of Embodiment 1 Perspective view of shield shell Front view of shield shell Longitudinal section of shield shell Cross section of shield shell Vertical section of the first connector (shield connector) A longitudinal sectional view showing the fitting state of the first connector and the second connector Longitudinal sectional view of shield shell of embodiment 2 Cross-sectional view of shield shell of embodiment 2

Explanation of symbols

F ... 1st connector (shield connector)
DESCRIPTION OF SYMBOLS 10 ... Housing 11 ... Inner housing 12 ... Outer housing 13 ... Connection part 20 ... Shield shell 27 ... Notch part 28 ... Noise absorption means 28a ... Concave part 28b ... Convex part 30 ... Terminal metal fitting

Claims (5)

The terminal fitting is housed in a synthetic resin housing,
In a shielded connector that restricts leakage of noise emitted from the terminal fittings by surrounding the terminal fittings with a cylindrical metal shield shell provided in the housing,
A shield connector characterized in that the shield shell is provided with noise absorbing means for improving the noise absorption rate in the shield shell by making the inner surface of the shield shell uneven. The shield connector according to claim 1, wherein the noise absorbing means is formed by forming a plurality of recesses on the inner surface of the shield shell. The shield connector according to claim 1 or 2, wherein the noise absorbing means is configured by forming a plurality of convex portions on an inner surface of the shield shell. The shield connector according to claim 3, wherein the protruding end of the convex portion has a sharp shape. The housing has a form in which an inner housing that houses the terminal fitting and an outer housing that surrounds the inner housing are integrated via a connecting portion,
The shield shell is formed with a notch,
A shield connector in which the shield shell is adapted to be inserted into a gap between the inner housing and the outer housing while fitting the notch into the connecting portion,
The shield connector according to any one of claims 1 to 4, wherein the noise absorbing means is disposed at a position opposite to the notch with the terminal fitting interposed therebetween.

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