1. Field of the Invention
The present invention relates to a shield connector used for carrying out an electric connection operation between electronic devices mounted to, for example, a vehicle or the like.
2. Description of the Related Art
Various electronic devices are mounted to an automobile that is a vehicle. For this reason, the automobile is provided with a wire harness used to transmit a power or a control signal to the above-described electronic devices. The wire harness includes plural electric wires and connectors attached to the electric wires.
The electric wire is a so-called coating wire that includes a conductive core wire and a coating portion formed of a synthetic resin so as to coat the core wire. The connector includes a terminal metal part that is formed of conductive metal and a connector housing which accommodates the terminal metal part. The connector housing is formed of an insulating synthetic resin, and is fitted to connectors of the above-described electronic devices. In the above-described wire harness, the connectors are fitted to the connectors of the electronic devices so as to transmit a desired power or signal to the electronic devices.
In the above-described automobile, for example, a navigation device is mounted as an electronic device. The navigation device includes a body part that calculates a current position or the like and a display that displays a current position or a target position. The body part and the display are connected to each other via the above-described wire harness. Since the display is required to have higher resolution and to display the current position or the like in real time, a signal amount transmitted from the body part to the display tends to increase.
For this reason, a connector that is used to connect the body part to the display of the above-described navigation device needs to transmit a large amount of signal at a high speed. Thus, in the above-described connector, it is important to provide a countermeasure for noise which prevents the case where electric noise leaks to the outside from a terminal metal part for transmitting a large amount of signal or electric noise enters from the terminal metal part to another terminal metal part.
As the above-described countermeasure for noise, for example, a shield connector shown in
Each terminal metal part 101 is formed of conductive metal so as to have a bar shape. The terminal holder 103 is formed of an insulating synthetic resin, and includes a holder body 110 which is formed in a cubic shape and includes a terminal accommodation groove 111 for accommodating the terminal metal part 101; a cover 112 which is attached to the holder body 110 and covers an electric wire (not shown) connected to the terminal metal part 101.
The inner housing 104 is formed in a rectangular tube shape of which one end is blocked and the terminal holder 103 is inserted therethrough. The outer housing 105 is formed in a rectangular tube shape in which the inner housing 104 and the shield shell 106 are accommodated. The shield shell 106 includes an upper shield shell 113 and a lower shield shell 116 that are attached to each other so as to cover the outer periphery of the inner housing 104.
The upper shield shell 113 is formed by bending, for example, a metal plate or the like, and includes a body portion 114 which is formed in an angular gutter shape (having a U-shape in a sectional view) 114 and plural extension walls 115 which extend from one end of the body portion 114. The lower shield shell 116 is formed by bending, for example, a metal plate or the like, and includes a body portion 117 which is formed in an angular gutter shape (having a U-shape in a sectional view) 117 and a cylindrical tube portion 118 which extends from one end of the body portion 117 and allows the electric wire connected to the terminal metal part 101 to pass therethrough.
The shield connector 100 having the above-described configuration is assembled as below. First, the terminal metal part 101 attached with the electric wire is accommodated in the terminal accommodation groove 111 so as to be attached to the holder body 110, and the cover is attached to the holder body 110, thereby holding the terminal metal part 101 in the terminal holder 103. Subsequently, the terminal holder 103 holding the terminal metal part 101 is inserted into the inner housing 104.
In addition, in the state where the upper shield shell 113 and the lower shield shell 116 are attached to each other so as to cover the outer periphery of the inner housing 104, the shield shell 106 is attached to the inner housing 104, and the inner housing 104 and the shield shell 106 are accommodated in the outer housing 105. In this manner, the shield connector 100 is assembled, and is fitted to an opposite connector (not shown).
In the shield connector 100 assembled as described above, electric noise leaking to the outside from the terminal metal part 101 and electric noise entering from the outside to the terminal metal part 101 are shielded by the shield shell 106.
However, in the above-described shield connector 100, when the upper shield shell 113 and the lower shield shell 116 of the shield shell 106 are attached to the inner housing 104, as shown in
Accordingly, an object of the invention is to provide a shield connector capable of preventing occurrence of an erroneous assembling operation.
In order to solve the above-described problems and to achieve the above-described object, according to a first aspect of the invention, there is provided a shield connector including: plural terminal metal parts; an insulating connector housing which includes a holder for holding the plural terminal metal parts and an inner housing for allowing the holder to be inserted therethrough; and a conductive shield shell which is attached to the inner housing, wherein the shield shell includes a pair of shell members which is attached to each other so as to cover the outer periphery of the inner housing, and wherein one shell member of the pair of shell members includes a detection portion which detects the state where the holder is being inserted into the inner housing by overlapping with at least a part of a surface of the holder on the rear end side in an insertion direction toward the inner housing in the state where the one shell member is attached to the inner housing and by coming into contact with the holder so as to regulate the one shell member from being attached to the inner housing in the state where the holder is being inserted into the inner housing.
A second aspect of the invention provides the shield connector according to the first aspect, wherein a pair of the detection portions is respectively provided in one ends of the one shell member on the rear end side in the insertion direction of the holder so as to be opposed to each other with the inner housing interposed therebetween.
According to the first aspect of the invention, since one shell member of the pair of gutter-shaped shell members of the shield shell which are attached to each other so as to cover the outer periphery of the inner housing includes the detection portion which detects the state where the holder is being inserted into the inner housing by overlapping with at least a part of a surface of the holder on the rear end side in an insertion direction toward the inner housing in the state where the one shell member is attached to the inner housing and by coming into contact with the holder so as to regulate the one shell member from being attached to the inner housing in the state where the holder is being inserted into the inner housing, it is possible to reliably prevent the holder from coming off from the inner housing and to reliably assemble the shield shell in the inner housing.
According to the second aspect of the invention, since the pair of the detection portions is respectively provided in one ends of the one shell member on the rear end side in the insertion direction of the holder so as to be opposed to each other with the inner housing interposed therebetween, it is possible to reliably prevent the holder from coming off from the inner housing and to reliably assemble the shield shell in the inner housing.
As described above, according to the first aspect of the invention, since it is possible to prevent the holder from coming off from the inner housing and to reliably assemble the shield shell in the inner housing, it is possible to prevent occurrence of an erroneous assembling operation.
According to the second aspect of the invention, since it is possible to reliably prevent the holder from coming off from the inner housing and to reliably assemble the shield shell in the inner housing, it is possible to prevent occurrence of an erroneous assembling operation.
Hereinafter, a connector according to an embodiment of the invention will be described with reference to
By bending a conductive metal plate, the female terminal 2 is formed. As shown in
The electric wire connection portion 10 includes plural caulking pieces (not shown), and the plural caulking pieces are used to caulk the terminal of an electric wire (not shown) so as to be electrically connected to the electric wire. The electric contact portion 11 is formed in a tube shape, and is electrically connected to the female terminal in such a manner that an opposite female terminal (not shown) enters the inside of the electric contact portion 11.
As shown in
The outer housing 4 is formed of an insulating synthetic resin. As shown in
The locking arm 12 includes a pair of arm portions 13 which is connected to the outer housing 4 and extends in a longitudinal direction of the outer housing 4 from one end 4a of the outer housing 4 opposed to the connector housing of the opposite connector; and a locking portion 14 which is provided in the outer surface of the pair of arm portions 13 in a convex shape.
The pair of arm portions 13 is disposed in parallel so as to have a gap therebetween, and is elastically deformable so as to be close to the outer surface of the outer housing 4. The locking portion 14 is formed in an angular column shape, and a longitudinal direction thereof is perpendicular to a longitudinal direction of the pair of arm portions 13 so as to connect the front ends of the pair of arm portions 13 to each other.
In the locking arm 12 having the above-described configuration, when the connector housing 3 is fitted to the opposite connector housing (not shown), the locking portion 14 of the locking arm 12 engages with a locking portion of the opposite connector housing, thereby maintaining a fitting state between the connector housing 3 and the opposite connector housing.
As shown in
The inner housing 5 is formed of an insulating synthetic resin. As shown in
The small diameter portion 16 mainly accommodates the electric contact portion 11 of the female terminal 2. The large diameter portion 17 mainly accommodates the terminal holder 6 and the electric wire connection portion 10 of the female terminal 2. In addition, the outer surface of the large diameter portion 17 is attached with a below-described upper shield shell 25 of the shield shell 8, and is provided with plural engagement protrusion portions 19 that engage with engagement holes 34 of the upper shield shell 25. The engagement protrusion portions 19 respectively engage with the engagement holes 34 so as to fix the large diameter portion 17 of the inner housing 5 and the upper shield shell 25 of the shield shell 8.
The terminal holder 6 is formed of an insulating synthetic resin, and includes a pair of holder bodies 20 and a pair of covers 22 that is respectively attached to the pair of holder bodies 20. Each of the pair of holder bodies 20 is formed in a flat plate shape, and is provided with plural terminal accommodation grooves 21 that accommodate the female terminals 2. The plural terminal accommodation grooves 21 is formed in the outer surface of the holder body 20 so as to have a concave shape and is disposed so as to be in parallel to each other. In addition, the pair of holder bodies 20 overlaps with each other so as to be in parallel to each other.
Each of the pair of covers 22 is formed in a cube shape. Each of the pair of covers 22 is attached to each holder body 20 so as to block a side where the electric wire connection portion 10 of the female terminal 2 is disposed in the terminal accommodation groove 21 of each holder body 20.
The terminal holder 6 having the above-described configuration is assembled in such a manner that the pair of holder bodies 20 accommodating the female terminal 2 attached with the electric wire in the terminal accommodation groove 21 is overlaps with each other, and the cover 22 is attached to each of the pair of holder bodies 20. In addition, the terminal holder 6 corresponds to the holder described in “CLAIMS”.
The rear holder 7 is formed of an insulating synthetic resin. As shown in
The shield shell 8 is a pair of shell members that includes the upper shield shell 25 and the lower shield shell 35.
The upper shield shell 25 is formed of a conductive metal material, and is formed by bending, for example, a metal plate or the like. As shown in
In the body portion 26, a width of the body portion 26, that is, a gap between the pair of side plate portions 28 is set to be substantially equal to a width of the large diameter portion 17 of the inner housing 5. In addition, each of the pair of side plate portions 28 of the body portion 26 includes a locking protrusion 33 which is provided in each outer surface of the pair of side plate portions 28 so as to have a convex shape and an engagement hole 34 which is formed through each of the pair of side plate portion 28.
As shown in
Each of the pair of extension walls 30 extends from one end 28a of each side plate portion 28 in a longitudinal direction. When the upper shield shell 25 is attached to the inner housing 5, one end 28a of each side plate portion 28 is positioned on the rear end side in a direction in which the terminal holder 6 is inserted into the inner housing 5. The pair of extension walls 30 is opposed in parallel to each other so as to have a gap therebetween. Each of the pair of extension walls 30 includes an overlapping portion 31 and a parallel portion 32.
The overlapping portion 31 is connected to one end 28a of the side plate portion 28 and extends to the inside of the body portion 26. The overlapping portion 31 extends from one end 28a of the side plate portion 28 in a direction perpendicular to the side plate portion 28. The parallel portion 32 is connected to the overlapping portion 31 and extends in a direction away from the side plate portion 28. The parallel portion 32 is in parallel to the side plate portion 28.
In the upper shield shell 25 having the above-described configuration, the body portion 26 is attached to the large diameter portion 17 so as to cover the upper surface (the upside of
The lower shield shell 35 is formed of a conductive metal material, and is formed by bending, for example, a metal plate or the like. As shown in
The body portion 36 is formed in an angular gutter shape (having a U-shape in a sectional view) including a bottom plate portion 37 (shown in
The locking piece 39a is provided so as to protrude from the outer surface of the side plate portion 38. The locking piece 39a is formed in a band plate shape in a longitudinal direction of the side plate portion 38, where one end is connected to the side plate portion 38 and the other end is a free end. The locking piece 39a is elastically deformable so that the other end moves close to the side plate portion 38. The locking piece 39a engages with the locking protrusion portion 15 of the outer housing 4 so as to fix the lower shield shell 35, that is, the shield shell 8 and the outer housing 4.
The locking hole 39b is formed through the side plate portion 38, and is formed in a rectangular shape. The locking hole 39b is provided at a position where each side plate portion 38 corresponds to the locking protrusion 33 of the body portion 26 of the upper shield shell 25. When the lower shield shell 35 is attached to the inner housing 5 attached with the upper shield shell 25, the locking hole 39b is locked to the locking protrusion 33 of the body portion 26 of the upper shield shell 25, thereby fixing the upper shield shell 25 and the lower shield shell 35 to each other.
The electric wire accommodation portion 40 includes a cylindrical tube portion 41 through which the electric wire attached to the female terminal 2 passes and a connection portion 42 that connects the tube portion 41 to the body portion 36. A pair of the connection portions 42 is formed in a band plate shape and extends from the pair of side plate portions 38 of the body portion 36 on the side of the bottom plate portion 37.
In the lower shield shell 35 having the above-described configuration, the body portion 36 is attached to the inner housing 5 attached with the upper shield shell 25 so as to cover the lower surface (the downside of the drawing) of the inner housing 5 and the pair of side plate portions 28 of the upper shield shell 25, and the electric wire attached to the female terminal 2 is disposed inside the electric wire accommodation portion 40. In addition, the lower shield shell 35 corresponds to the shell member described in “CLAIMS”.
The shield connector 1 having the above-described configuration is assembled as below. First, the female terminal 2 attached with the electric wire is accommodated in the terminal accommodation groove 21 of the terminal holder 6 in advance, and the cover 22 is attached to the holder body 20 so that the terminal holder 6 holds the female terminal 2.
Next, as shown in
Subsequently, as shown in
At this time, as shown in
Subsequently, when the upper shield shell 25 is attached to the inner housing 5, the pair of extension walls 30 of the upper shield shell 25 is positioned to the side of the large diameter portion 17 of the inner housing 5 away from the small diameter portion 16. That is, the pair of extension walls 30 of the upper shield shell 25 is positioned to the rear end side in a direction in which the terminal holder 6 is inserted into the inner housing 5. Accordingly, both overlapping portions 31 of the pair of extension walls 30 overlap with a surface 6a (shown in
Subsequently, the body portion 36 of the lower shield shell 35 is attached so as to cover the lower surface (the downside of
When the upper shield shell 25 and the lower shield shell 35 are attached to each other in this manner, the shield shell 8 is attached to the inner housing 5 so as to cover the outer periphery of the inner housing 5 accommodating the terminal holder 6 and the female terminal 2.
Consequently, the inner housing 5 attached with the shield shell 8 is inserted into the outer housing 4. Accordingly, the step portion 18 of the inner housing 5 engages with the locking protrusion portion 15 of the outer housing 4 so as to prevent the inner housing 5 from coming off from the outer housing 4. In addition, the locking piece 39a of the lower shield shell 35 engages with the locking protrusion portion 15 of the outer housing 4 so as to prevent the inner housing 5 from coming off from the outer housing 4.
In addition, after the inner housing 5 and the shield shell 8 are accommodated in the outer housing 4, the rear holder body 23 of the rear holder 7 is attached to the other end 4b of the outer housing 4 so that the electric wire attached to the female terminal 2 passes through the inside of the tube portion 24 and the rear holder body 23 of the rear holder 7. In this manner, the shield connector 1 is assembled.
The shield connector 1 assembled as described above is fitted to the opposite connector to thereby form a wire harness provided in an automobile or the like.
According to this embodiment, among the gutter-shaped upper shield shell 25 and the lower shield shell 35 of the shield shell 8 which are attached to each other so as to cover the outer periphery of the inner housing 5, the upper shield shell 25 includes the extension wall 30 which detects the state where the terminal holder 6 is being inserted into the inner housing 5 by overlapping with at least a part of the surface 6a of the terminal holder 6 on the rear end side in the insertion direction toward the inner housing 5 in the state where the upper shield shell 25 is attached to the inner housing 5 and by coming into contact with the terminal holder 6 so as to regulate the upper shield shell 25 from being attached to the inner housing 5 in the state where the terminal holder 6 is being inserted into the inner housing 5.
Accordingly, since it is possible to reliably prevent the terminal holder 6 from coming off from the inner housing 5 and to reliably assemble the shield shell 8 in the inner housing 5, it is possible to prevent occurrence of an erroneous assembling operation.
Further, since the pair of extension walls 30 is provided in one end 28a of the upper shield shell 25, located on the rear end side in the insertion direction of the terminal holder 6, so as to be opposed to each other with the inner housing 5 interposed therebetween, it is possible to reliably prevent the terminal holder 6 from coming off from the inner housing 5 and to reliably assemble the shield shell 8 in the inner housing 5. Accordingly, it is possible to prevent occurrence of an erroneous assembling operation.
Furthermore, the shield connector 1 according to the invention can be used for different purposes other than the wire harness mounted to an automobile. For example, the shield connector 1 can be used for an electronic device (a television, a personal computer, a surveillance camera, or the like) of a house and the like, a network of a building, or the like.
Moreover, the above-described embodiment is an exemplary embodiment of the invention, but the invention is not limited thereto. That is, various modifications can be made in a range without departing from the spirit of the invention.
Number | Date | Country | Kind |
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2008-105569 | Apr 2008 | JP | national |
Number | Name | Date | Kind |
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4891022 | Chandler et al. | Jan 1990 | A |
6821151 | Lai | Nov 2004 | B2 |
6857904 | Lai | Feb 2005 | B2 |
7232341 | Shinmyo | Jun 2007 | B2 |
7267578 | Wu | Sep 2007 | B2 |
7341487 | Wu | Mar 2008 | B2 |
Number | Date | Country |
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2006-310164 | Nov 2006 | JP |
Number | Date | Country | |
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20090258540 A1 | Oct 2009 | US |