JP4114867B2 - Shielded electrical connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a shield-type electrical connector that is mounted mainly on precision equipment, high-frequency equipment, etc., and at least a part of an insulating housing that fixes and holds contacts is covered with a shield (electromagnetic shielding) member. Relates to a shielded electrical connector having a structure in which a shield member has a contact portion that comes into contact with a casing for grounding, and is entirely mounted on a connection object such as a wiring board.
[0002]
[Prior art]
Conventionally, as an example of a shielded electrical connector having an electromagnetic blocking function for this type of contact, there is a configuration as shown in FIG.
[0003]
This shielded electrical connector is formed by covering the periphery of an insulating housing 11 in which a plurality of contacts (not shown) are fixedly held with a shield member 12, and is mounted on a wiring board (not shown) that is an object to be connected to the connector body. In addition, a part of the shield member 12 is brought into contact with the housing for grounding when attached to a housing (panel) (not shown).
[0004]
Specifically, the shield member 12 here covers the entire rear periphery in the fitting direction M with the mating connector in the insulating housing 11 in which the connector opening 16 is formed. The pair of grounding pieces 15 are erected on the upper surface opposite to the mounting surface of the connector body on the wiring board, and are inclined to rise to the front side in the fitting direction M by cutting. . These grounding pieces 15 are arranged side by side on the connector opening 16 side on the upper surface of the shield member 12, and a flat spring piece 15 a that is inclined and rises and a contact portion 15 b that is bent from the spring piece 15 a are integrated. The contact portion 15b is in contact with a local portion of the housing and is grounded. Further, in the case of this shield type electrical connector, each contact is of a pin type that is press-fitted into the housing 11, and one end side is exposed in the connector opening 16 to be used for connection with the contact of the mating connector. In addition, the angle type is bent 90 degrees in the middle and the other tip side is used for connection to the wiring board. Further, in the case of this shield type electrical connector, flanges 14 are provided on both side surfaces along the fitting direction M of the shield member 12 for mounting on the wiring board.
[0005]
In general, in such a shielded electrical connector, the signal transmission contact is sufficiently shielded and the shield member 12 is used for the purpose of being connected to a precision machine or a high-frequency device. Must be sufficiently stably connected to a member (housing) connected to the ground (GND).
[0006]
As another example related to the shielded electrical connector, in a basic configuration in which at least a part of an insulating housing to which at least one contact is fixed is surrounded by a shield member having a ground arm, the ground arm is formed from the upper side wall of the shield member. A double cantilever beam having a first portion extending rearward and a second portion connected to the first portion by a curved portion and extending obliquely forward away from the first portion, wherein the second portion is a shield The thing (patent document 1) of the structure which has a contact surface in the free end located in the front wall vicinity of a member is mentioned.
[0007]
[Patent Document 1]
Patent No. 3313143 (Claims, FIG. 2)
[0008]
[Problems to be solved by the invention]
In the case of the shielded electrical connector shown in FIG. 6 described above, a pair of grounding contacts in which the contact portion for grounding of the shield member with respect to the housing is raised by cutting on the upper surface opposite to the mounting surface of the connector body on the wiring board. Since the structure is provided on the tip side of the piece, not only the height of the entire connector including the shield member is increased, but also the contact part on the tip side of the grounding piece is brought into contact with the housing side. There is a problem that it is difficult to apply it to equipment that requires recent downsizing and low height because it is necessary to secure the location and the height of the housing must be sufficiently large Since the spring piece of the grounding piece is inclined and rises flat, if an external force is applied and the inclination angle of the spring piece changes, it is sufficient for the bent contact portion on the tip side. It becomes impossible to give a stable urging force (elastic restoring force). In such a case, a contact failure occurs and the grounding function is not sufficiently secured, so that the shielding effect is not sufficiently exhibited. There is also.
[0009]
In the case of the shielded electrical connector of Patent Document 1, the grounding piece (grounding arm) including the contact portion on the tip side is extended from the upper surface opposite to the mounting surface of the shield member to the lower side on both sides. The existing structure is advantageous in that the height of the entire connector including the shield member can be reduced in height and the height of the housing can be reduced. The grounding piece is a double cantilever beam, and the second part with the free end at the tip as the contact part extends from the first part diagonally forward by the curved part. When external force is applied, it is easier to be deformed than the case of the grounding piece described above (prone to bending, twisting, etc.). Can no longer give power, In addition to the problem that the shielding effect is not fully exhibited due to insufficient functions, the shield member covers the majority of the contact housing surface and the grounding piece is secured, so the shield There is also a problem that the entire member has a complicated structure, and the cost required for manufacturing the member is high, and the cost is likely to increase.
[0010]
The present invention has been made to solve such problems, and its technical problem is that the shielding effect is sufficiently enhanced with a simple small-sized structure and that the ground contact with the housing is sufficiently stable. It is to provide a shielded electrical connector that can be measured.
[0011]
[Means for Solving the Problems]
According to the present invention, at least a part of an insulating housing fixedly holding at least one contact is covered with a shield member, and the contact portion is in contact with the casing for grounding. in the a and shielded electrical connector, generally implemented in connection target, the shield member may have a terminal portion for ground connection directly mounted to the ground portion of the object to be connected, The terminal portion is formed as a local portion of the grounding piece formed integrally with the contact portion, and the shield member extends from the upper surface to the side surface opposite to the mounting surface on the connection target in the connector body. The grounding piece is bent at the side surface of the shield member from the mounting side edge on the connection object, and extends to the rear side in the fitting direction with the mating connector, and the spring fixing portion. A spring portion that extends to the rear side in the mating direction and is folded back to the front side in the mating direction, and is folded back from the spring portion to the rear side in the mating direction and is in contact with the housing local area. A spring fixing portion in which a spring portion is formed when the connector is mounted on the connection target, and the contact portion and the terminal portion bent in the vertical direction from the spring fixing portion and the flat surface of the connection target are integrated. As for a part, the shield type electrical connector by which both ends are supported by both the side surface of a shield member and a terminal part is obtained.
[0013]
Furthermore, according to the present invention, in the above shielded electrical connector, a shielded electrical connector is obtained in which the terminal portion has a portion provided independently and integrally with the shield member in addition to the local portion of the grounding piece.
[0014]
In addition, according to the present invention, in the shielded electrical connector described above, the shield member extends from the upper surface of the connector body to both side surfaces, and the grounding pieces are paired on both side surfaces of the shield member. It is preferable that it was provided.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view showing a basic configuration of a shielded electrical connector according to one embodiment of the present invention from the front side. FIG. 2 is an external perspective view showing the shielded electrical connector from the rear side. 3 is a front view of the shielded electrical connector, and FIG. 4 is a side view of the shielded electrical connector.
[0016]
As a technical outline, this shield-type electrical connector has a mounting surface on an object to be connected in an insulating housing 1 in which a plurality of contacts 3 (three cases are illustrated in FIG. 3) are fixedly held. Cover the four sides (upper surface, both side surfaces, and rear surface) with a shield member 2 made of a box-shaped metal except for a lower surface and the front surface on which the connector opening 6 on the near side in the fitting direction M of the mating connector is formed. In addition, the shield member 2 has a contact portion 5d (included in a grounding piece 5 to be described later) that comes into contact with a housing (panel) (not shown) for grounding, and the whole is illustrated as a connection object. In the basic structure that is mounted on a wiring board that is not provided, the shield member 2 has a terminal portion 5b and a terminal portion 7 that are directly attached to the grounding portion of the wiring board for ground connection. However, with respect to the terminal portions 5b and 7 included in these shield members 2, the terminal portion 5b is a local portion of the grounding piece 5 formed integrally with the contact portion 5d, and the terminal portion 7 is the grounding piece 5. In addition to the local part, the shield member 2 is integrally provided at two locations spaced apart on the lower edge of the rear wall 2b of the shield member 2 so as to extend downward and perpendicular to the mounting surface of the wiring board.
[0017]
In other words, the grounding pieces 5 here are provided as a pair on both side walls 2a of the shield member 2, and are bent from the side edge of the shield member 2 on the side of the wiring board and not shown. A flat spring fixing portion 5a extending to the rear side of the fitting direction M with the side connector and contacting the flat surface of the wiring board; and extending from the spring fixing portion 5a to the rear side of the fitting direction M. The spring part 5c folded back to the front side in the fitting direction M and curved in a semicircular arc shape, and the contact part 5d folded back from the spring part 5c to the rear side in the fitting direction M and brought into contact with the housing local part And a terminal portion 5b bent in a vertical direction from the flat surface of the wiring board from the spring fixing portion 5a.
[0018]
In addition, in the case of this shield type electrical connector, each contact 3 is of a pin type that is press-fitted into the housing 1, as in the conventional structure shown in FIG. In addition to being exposed to the inside and used for connection with the contact of the mating connector, it is bent at an angle of 90 degrees and the other tip side is used for connection to the wiring board. On both side surfaces along the fitting direction M, flanges 4 are provided for mounting on the wiring board.
[0019]
By the way, the shield member 2 including the grounding piece 5 and the terminal portion 7 can be easily and inexpensively manufactured by performing punching and bending from a single metal plate. Specifically, first, a metal plate cut out of a contour figure on the entire plane of the shield member 2 including the grounding piece 5 and the terminal portion 7 is punched out by punching. Next, in the punched contour flat plate, the side wall 2a and the rear wall 2b are formed by bending the periphery of the upper surface wall for covering the entire upper surface of the connector vertically by bending to form a box-shaped body. obtain. Further, the spring fixing portion 5a is formed by bending outward from the side edge of the side wall 2a by 90 degrees, and the terminal portion 5b is formed by bending the distal end side of the spring fixing portion 5a inward by 90 degrees. Thereafter, a piece extending from the middle portion of the spring fixing portion 5a in the mating direction M of the mating connector is folded back into a semicircular arc shape to form the spring portion 5c, and finally the tip side is further extended. The contact portion 5d is formed by bending in the fitting direction M by bending. Note that the terminal portion 5b extending to the distal end side of the spring fixing portion 5a may be finally formed after the spring portion 5c and the contact portion 5d are formed.
[0020]
FIG. 5 is a perspective view of a main part for explaining a mounting state on the wiring board 8 which is a connection target in the shielded electrical connector and a mounting state on the housing (panel) 9. FIG.
[0021]
Here, when the shield-type electrical connector is mounted on the wiring board 8 using the flanges 4, both side walls of the box-shaped metal shield member 2 covering the four sides (upper surface, both side surfaces, and rear surface) of the housing 1. Since the terminal portion 5b of the grounding piece 5 integrally formed with 2a and the pair of terminal portions 7 integrally formed with the rear wall 2b are attached to the grounding portion of the wiring board 8 and grounded, Since the entire connector is completely covered and shielded by the metal shield member 2 via the wiring board 8, the shield effect is sufficiently enhanced as compared with the conventional structure shown in FIG. The height of the entire connector including the height can be reduced, and the height of the housing 9 can also be reduced. Further, when the shielded electrical connector mounted on the wiring board 8 is attached to the housing 9 so that the front side is partially exposed to the outside, both sides of the flat spring fixing portion 5a are firmly fixed in the grounding piece 5. Unlike the structure of Patent Document 1, when the spring portion 5c is bent, the main body portion is in close contact with the mounting surface of the wiring board 8 and fixed to the spring portion 5c. The spring portion 5c and the contact portion 5d are not easily deformed such as bending or twisting, and a sufficiently stable urging force can be applied to the tip-side contact portion 5d. With such a small structure, the ground contact with the housing 9 can be measured sufficiently stably, and the shield function can be obtained accurately and effectively.
[0022]
【The invention's effect】
As described above, according to the shielded electrical connector of the present invention, the shield member having the conventional structure is improved, and the grounding member is integrally formed on both side walls of the box-shaped metal shield member covering the housing. The terminal part in the piece and the pair of terminal parts integrally formed on the rear wall are directly attached to the grounding part of the wiring board which is the connection object, and connected to the ground, and also in contact with the casing. The contact portion of the grounding piece is formed by being bent in the fitting direction of the mating contact at the front end side of the spring portion folded back in a semicircular arc shape from the flat spring contact portion that is in close contact with the mounting surface of the wiring board Therefore, the shielding effect can be sufficiently enhanced with a simple small structure, and the ground contact with the housing can be measured sufficiently stably.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing a basic configuration of a shielded electrical connector according to an embodiment of the present invention from the front side.
FIG. 2 is an external perspective view showing the shielded electrical connector shown in FIG. 1 from the rear side.
3 is a front view of the shielded electrical connector shown in FIG. 1. FIG.
4 is a side view of the shielded electrical connector shown in FIG. 1. FIG.
FIG. 5 is an external view showing a principal part in order to explain a mounting state on a wiring board that is a connection target in the shielded electrical connector shown in FIG. 1 and an attachment state to a housing; It is a perspective view.
FIG. 6 is an external perspective view showing a basic configuration of a conventional shielded electrical connector from the front side.
[Explanation of symbols]
1, 11 Housing 2, 12 Shield member 2a Side wall 2b Rear wall 3 Contact 4, 14 Flange 5, 15 Grounding piece 5a Spring fixing part 5b, 7 Terminal part 5c Spring part 5d, 15b Contact part 6, 16 Connector opening 8 Wiring board 9 Housing (panel)
15a Spring piece

Claims (3)

At least a part of an insulating housing fixedly holding at least one contact is covered with a shield member, and the shield member has a contact portion that is in contact with the casing for grounding, and the whole in shielded electrical connector but mounted on the object to be connected, the shield member may have a terminal portion for ground connection directly mounted to the ground portion of the object to be connected,
The terminal part is formed as a local part of a grounding piece formed integrally with the contact part,
The shield member extends from the upper surface opposite to the mounting surface to the connection object in the connector body, to the side surface,
The grounding piece is bent at a side surface of the shield member from a side edge mounted on the connection target, and extends to a rear side in a fitting direction with a mating connector, and the spring fixing portion Extending from the spring to the rear side in the fitting direction, bent back to the front side in the fitting direction, and bent from the spring part to the rear side in the fitting direction. The contact part that is in contact with the body part, and the terminal part that is bent in a direction perpendicular to the flat surface of the connection object from the spring fixing part, are integrally formed.
When the connector is mounted on the connection object, the spring fixing portion on which the spring portion is formed is supported at both ends by both the side surface of the shield member and the terminal portion. Electrical connector. 2. The shielded electrical connector according to claim 1, wherein the terminal portion includes a portion provided independently and integrally with the shield member in addition to the local portion of the grounding piece. . 2. The shielded electrical connector according to claim 1, wherein the shield member extends from the upper surface of the connector main body to both side surfaces, and the grounding pieces are paired on both side surfaces of the shield member. A shielded electrical connector characterized by being provided.

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