JP6319657B2 - Shield connector - Google Patents

Description

  The present invention relates to a shielded connector, and more particularly to a shielded connector having a double shield composed of an inner shield and an outer shield, and having a plurality of insertion ports side by side.

  2. Description of the Related Art A shield-type connector having a double shield composed of an inner shield arranged on the inner side and an outer shield arranged on the outer side is known. These shields are usually connected to a ground potential on the circuit, and electrical noise emitted from electrical signals passing through the shield connector is radiated to the outside, or electrical noise from the outside to the inside of the shield connector. It can play a role to prevent the intrusion, and better shield performance can be obtained than a shield connector having a single shield consisting only of the outer shield.

  As an example, the cited document 1 includes an inner housing 300 that holds the contacts 100 and 200, an outer housing 600, an inner shell (inner shield) composed of a first shell 400 and a second shell 500, In the shield connector 100 constituted by the outer shell 700 (outer shield), a shield connector having a ground function enhanced by connecting the inner shell and the outer shell by an elastic portion 550 provided in the second shell. It is disclosed. (See this application, Figure 5)

JP-A 2005-38725 (paragraph 0023, FIG. 1, etc.)

  In recent years, with the increase in the transmission speed of electrical signals transmitted through a shield connector, there is an increasing number of cases where a shield connector having good shielding performance is indispensable due to the double shield as described above. It is coming. On the other hand, there is an increasing demand for miniaturization of electronic devices including a shield connector having such a double shield, and in order to realize this, the space occupied by the shield connector having a double shield is reduced. It is requested to do.

  This invention is made in view of such a subject, Comprising: It occupies an occupied space rather than arrange | positioning multiple shield connectors provided with only one conventional insertion port by integrally providing a plurality of insertion ports. An object of the present invention is to obtain a shield connector that can be reduced in size and has good shielding performance at each insertion port.

In order to solve the above-described problems, a shielded connector according to the present invention includes a housing in which a plurality of insertion openings into which a matching mating connector is inserted are opened sideways and toward the front side, and conductive. Formed by an inner conductive shield that is formed in a cylindrical shape by a metal plate and is disposed inside each insertion port along the direction in which the mating connector is inserted and held by the housing, and an electrically conductive metal plate having elasticity An outer shield that integrally covers the outside of the housing, and a contact that is disposed inside the inner shield and is held by the housing, and contacts the mating connector to obtain electrical continuity. A plurality of contact pieces that are integrally formed from the outer shield and that are in contact with the inner shield to obtain electrical continuity; Shield is conductive to the outer shield and electrically via at least two contact pieces, the contact is more disposed within the inner shield of each, said inner shield, said contact is disposed Two contact wall portions that are orthogonal to the direction in which the contact piece is located and are located on both sides in the vicinity of the contact disposed inside, and the contact piece is arranged so as to contact the contact wall portion. Among the contact pieces, an intermediate contact piece located between the plurality of insertion openings is bent so as to extend along a back surface by extending a part of the surface constituting the outer shield. Each of the two thin plate-like tip portions having a bifurcated plate surface is further bent toward the front side, and the conductive metal plate is broken against the corresponding contact wall portion. It is in contact with section And features.

  In a shield connector having a double shield, by providing a plurality of insertion ports side by side, the occupied space is reduced as compared with the case where a plurality of shield connectors having only one insertion port are arranged. In addition, at each insertion port, the impedance related to the electrical connection between the inner shield and the outer shield can be reduced by electrically connecting the inner shield and the outer shield in at least two places. Therefore, good shielding performance can be obtained at each insertion port.

  In order to further improve the shield performance, it is necessary to dispose the shield as close as possible to the contact through which the electric signal transmitted at high speed passes, and to reduce the impedance of the shield particularly in the portion close to the contact. In the inner shield of the shield connector according to the present invention, contact wall portions are provided on both sides in the vicinity of the contact, and the contact wall portion and the contact piece come into contact with each other to be electrically connected to the outer shield, thereby functioning as a shield. The two contact wall portions that also fulfill the role are arranged in a positional relationship so as to sandwich the contact, and at least the two contact wall portions are electrically connected to each other between the inner shield and the outer shield. The impedance relating to the connection can be effectively reduced. As a result, extremely good shielding performance can be obtained at each insertion port.

  In forming the intermediate contact piece, a part of the surface constituting the outer shield is extended and bent along the back surface of the shield connector, and further, the tip portion thereof is bent toward the front side of the shield connector. Therefore, it is preferable that the tip portion functions as an intermediate contact piece. However, in this case, if the intermediate contact piece and the contact wall portion are brought into contact with each other so that the plate surfaces face each other, a process of twisting the plate surface of the portion bent toward the front side by 90 ° is performed. Need to be applied. Such a twisting process not only decreases the productivity of the outer shield, but also increases the manufacturing cost of the shield connector.

  Similarly, when the intermediate contact piece is formed, the intermediate contact piece is brought into contact with the corresponding contact wall portion at the fracture surface, so that twisting is not required. It is possible to avoid a decrease in performance and an increase in manufacturing cost of the shield connector.

  The shield connector according to the present invention is characterized in that the inner shield is inserted into the housing from the front side to the rear side in the insertion port and held at a predetermined position.

  With this configuration, the shield connector can be easily assembled, and at the same time that the inner shield reaches a predetermined position, electrical conduction with the outer shield can be easily established.

  According to the present invention, by integrally providing a plurality of insertion ports, the occupied space can be reduced as compared with the case where a plurality of shield connectors having only one conventional insertion port are arranged, and a good shield is provided at each insertion port. A shield connector having performance can be obtained.

It is a front side perspective view which shows the external appearance of the shield connector which concerns on this invention. It is a back side perspective view showing the appearance of the shield connector concerning the present invention. It is the figure which removed and showed the housing of the shield connector which concerns on this invention. It is principal part sectional drawing of the shield connector which concerns on this invention. It is a figure which shows the conventional shield connector.

  A shield connector 1 according to an embodiment of the present invention will be described with reference to FIGS. For convenience of explanation, the front surface of the shield connector 1 in FIG. 1 is referred to as the front surface, and the back surface is referred to as the back surface.

  FIGS. 1 to 4 are perspective views showing the external appearance of the shield connector 1 according to the embodiment of the present invention as viewed from the front side, and FIG. 2 is a rear view of the shield connector 1 shown in FIG. FIG. 3 is a perspective view showing an external appearance, and FIG. 3 is the same direction as FIG. 2 with the housing 2 removed in order to explain the relationship among the inner shield 3, the outer shield 4, and the contact 5 in the shield connector 1 shown in FIG. FIG. 4 is a sectional view of the shield connector 1 taken along line AA shown in FIG.

  The shield connector 1 includes two insertion ports 2a into which a mating mating connector (not shown) is inserted side by side. The shield connector 1 is mounted in such a posture that its lower surface is opposed to a mounting surface of a printed wiring board (not shown). The shield connector 1 includes members of a housing 2, an inner shield 3, an outer shield 4, and a contact 5.

  The housing 2 is formed by injection molding an insulating resin. Each of the two insertion openings 2a described above is formed by opening the housing 2 in a cylindrical shape toward the front side of the shield connector 1. Inside each insertion port 2a, an inner shield 3 formed in a cylindrical shape is arranged in the direction in which the mating connector is inserted, that is, in the same direction as the direction in which the insertion port 2a extends.

  An inner shield holding hole 2b for holding the inner shield 3 is provided at the back of the insertion slot 2a (see FIG. 4). Two inner shield holding holes 2b are provided for each insertion port 2a corresponding to a contact wall portion 3b of the inner shield 3 to be described later. The width of the inner shield holding hole 2b is slightly narrower than the thickness of the conductive metal plate forming the inner shield 3, and the inner shield holding hole is formed such that a part of the inner shield 3 is directed from the front side to the back side. The inner shield 3 is firmly held by the housing 2 by being press-fitted to a predetermined position in 2b.

  A part of the housing 2 enters the upper side inside each inner shield 3. Four contacts 5 are provided for each inner shield 3 along a part of the lower surface of the housing 2. The four contacts 5 are arranged along the direction (left-right direction in FIG. 4) in which the insertion openings 2a of the shield connector 1 are arranged.

  A contact holding hole 2c for holding the contact 5 is provided on the back side of the housing 2 (see FIG. 2). Four contact holding holes 2c are provided for each insertion port 2a. The width of the contact holding hole 2c is slightly narrower than the thickness of the conductive metal plate forming the contact 5, and the contact 5 is pressed into the contact holding hole 2c from the back side to the front side. The contact 5 is firmly held by the housing 2.

  The inner shield 3 is formed by pressing a conductive metal plate. The inner portion 3 extends from the cylindrical portion 3a formed in a rectangular cylindrical shape and the plate surface forming the cylindrical portion 3a to the back side. And a contact wall portion 3b that protrudes toward the surface. The length of the cylindrical portion 3a is approximately half of the length in the depth direction of the insertion port 2a (the direction in which the mating connector is inserted). The part is covered. The contact wall portion 3b is formed in parallel with a surface orthogonal to the direction in which the contact 5 is disposed, and is disposed inside the inner shield 3 as shown in FIGS. It is formed on both sides in the vicinity of the contact 5.

  The outer shield 4 has an upper surface portion 4a and a side surface portion 4b so as to cover almost the entire surface from the upper surface to the side surface of the housing 2 by pressing an electrically conductive metal plate having elasticity, and has an outer shape of the housing 2. Are formed integrally with each other. The outer shield 4 is slid onto the housing 2 from the back side of the shield connector 1 and engaged with the housing 2.

  On the back side of both side surfaces 4b of the outer shield 4, a part of the plate surface forming the side surface 4b of the outer shield 4 is cut and raised toward the inside of the shield connector 1 to integrally form an outer contact piece 4c. ing. The distal end portions of the outer contact pieces 4c are opposed to the two contact wall portions 3b located outside the shield connector 1 among the two contact wall portions 3b provided on the two inner shields 3 described above. Placed in position. The outer contact piece 4c is formed in the shape of a cantilever spring, so that the distal end portion thereof can be elastically displaced and is in elastic contact with the contact wall portion 3b facing each other.

  In the center of the back surface side of the upper surface portion 4a of the outer shield 4, a part of the plate surface forming the upper surface portion 4a is extended and bent substantially at right angles along the back surface, and further, its tip portion forming a bifurcated shape Are bent at a substantially right angle toward the front side of the shield connector 1, and two intermediate contact pieces 4d are formed integrally with the outer shield 4. The intermediate contact piece 4d is located between the two insertion openings 2a, and the tip portions of the two contact wall portions 3b provided on the two inner shields 3 described above are mutually connected to the shield connector 1. It arrange | positions in the position which opposes the two contact wall parts 3b located inside.

  As described above, the intermediate contact piece 4d is formed in two thin plate shapes by dividing the plate surface along the back surface into a bifurcated shape. Since the thin plate-like portion is elastically deformed in a direction along the plate surface and in a direction in which the plate surface is twisted, the distal end portion of the intermediate contact piece 4d can be elastically displaced. Therefore, the contact wall portions 3b facing each other. On the other hand, it is in elastic contact with its fracture surface. By making elastic contact at the fracture surface in this way, good electrical continuity can be obtained without applying a process of twisting the plate surface forming the intermediate contact piece 4d.

  The outer contact piece 4c and the intermediate contact piece 4d of the outer shield 4 are in elastic contact with the two contact wall portions 3b of the inner shields 3, respectively, so that at least the inner shield 3 has at least these. Are electrically connected to the outer shield 4 at the two locations. Since the contact wall portion 3b is located on both sides in the vicinity of the contact 5, the impedance relating to the electrical connection between the inner shield 3 and the outer shield 4 in this portion can be effectively reduced, and a very good shield Performance can be obtained.

  Four fixed terminals 4e are formed in the vicinity of the lower four corners of the side surface portion 4b of the outer shield 4 so as to be elongated toward the lower side. When the shield connector 1 is mounted on the printed wiring board, the fixed terminal 4e is inserted into a through hole (not shown) provided in the printed wiring board corresponding to the fixed terminal 4e and soldered. This soldering point is connected to the ground potential in the circuit of the printed wiring board. Further, by fixing the shield connector 1 by soldering the fixing terminals 4e in this way, it is possible to obtain sufficient fixing strength against the twisting of the shield connector 1 that occurs when the mating connector is inserted / removed. .

  The contact 5 is formed into an elongated shape by pressing a metal plate material having good conductivity. As described above, the contact 5 is disposed while being held by the housing 2, and is in electrical contact with the mating contact 5 disposed on the mating connector inserted into the shield connector 1. . The contact 5 is bent downward at a substantially right angle along the back surface of the housing 2, and is bent at a substantially right angle toward the direction protruding from the back surface at a portion coinciding with the lower surface of the housing 2. . The portion protruding from the back surface becomes a connection portion 5a soldered to a land provided on the mounting surface of the printed wiring board.

The shield connector 1 described above can be easily assembled by the following procedure as an example.
Step 1: The contact 5 is press-fitted into the contact holding hole 2c of the housing 2 from the back side.
Step 2: Slide the outer shield 4 to the housing 2 from the back side.
Step 3: The inner shield 3 is press-fitted from the front side to a predetermined position of the inner shield holding hole 2b of the housing 2.

  Here, in step 3, the contact wall 3b, the outer contact piece 4c, and the inner contact piece come into elastic contact with each other at the same time when the inner shield 3 reaches a predetermined position. Therefore, for example, the inner shield 3 and the outer shield 4 can be connected to each other without requiring a special process for obtaining electrical continuity such as soldering between the inner shield 3 and the outer shield 4 or adhesion with a conductive adhesive. Is easily established.

  Although the shield connector 1 according to the embodiment of the present invention is illustrated as having two insertion ports, the scope of the present invention is not limited to two insertion ports, and three or more insertion ports are arranged side by side. Even if it is arranged, the present invention can be suitably implemented in the same manner as in this embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be preferably used in a shielded connector that can connect a plurality of mating connectors and that is used particularly for transmitting high-speed electrical signals.

DESCRIPTION OF SYMBOLS 1 Shield connector 2 Housing 2a Insertion slot 2b Inner shield holding hole 2c Contact holding hole 3 Inner shield 3a Tubular part 3b Contact wall part 4 Outer shield 4a Upper surface part 4b Side part 4c Outer contact piece 4d Intermediate contact piece 4e Fixed terminal 5 Contact 5a Connection part

Claims (2)

A housing in which a plurality of insertion ports into which compatible mating connectors are inserted are formed side by side and open toward the front side;
An inner shield that is formed in a cylindrical shape by a conductive metal plate, is arranged inside each insertion port along the direction in which the mating connector is inserted, and is held by the housing;
An outer shield formed by a conductive metal plate having elasticity and integrally covering the outside of the housing;
A contact disposed inside the inner shield and held by the housing to contact the mating connector to obtain electrical continuity;
In a shielded connector having
A plurality of contact pieces that are integrally formed from the outer shield and are in contact with the inner shield to obtain electrical conduction,
Each inner shield is in electrical communication with the outer shield via at least two contact pieces ;
A plurality of the contacts are disposed inside each of the inner shields,
The inner shield has two contact wall portions that are orthogonal to the direction in which the contacts are disposed and are located on both sides in the vicinity of the contacts disposed in the interior.
The contact piece is disposed so as to contact the contact wall portion,
Among the contact pieces, the intermediate contact piece positioned between the plurality of insertion openings has a bifurcated plate surface that is formed by extending a part of the surface constituting the outer shield and bending it along the back surface. Each of the two thin plate-like tip portions is further bent toward the front side, and is in contact with the corresponding contact wall portion at the fracture surface of the conductive metal plate . Shield connector characterized by that. 2. The shield connector according to claim 1 , wherein the inner shield is inserted into the housing from the front side to the rear side in the insertion port and held at a predetermined position.

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