JP4074022B2 - Shield connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique that is effective when applied to a detachable structure of a connector and a socket having a shield frame.
[0002]
[Prior art]
A connector (hereinafter referred to as “shielded connector”) in which a shielding frame is mounted around a terminal constituting a contact with a socket at a predetermined interval is known (Japanese Utility Model Laid-Open No. 7-16312).
[0003]
In this prior art, a single metal plate is formed into a flat rectangular cross section to obtain a shield frame, and the physical contact strength with the connector is maintained by the elasticity of the metal material of this frame. ing.
[0004]
However, such a conventional shielded connector generally does not have a locking mechanism, and it is very easy to remove it from the socket simply by grasping the connector body (plug) of the shielded connector and pulling it in the anti-socket direction. It was possible to pull out the connector.
[0005]
Such a structure is effective for consumer use such as cable connection between a digital video camera and a personal computer, which are frequently inserted and removed in ordinary households, but for business use such as a security camera for surveillance in a bank or store. Connection reliability is insufficient to ensure connection reliability.
[0006]
[Problems to be solved by the invention]
In this regard, it is conceivable to provide a mechanism for locking the connector and the socket at the time of connection by providing a movable protrusion on the frame side of the shield connector and providing an engagement hole on the socket side corresponding to this. However, in the case of a frame structure having a flat quadrangular cross section, there is a distance in the width direction, so if a lock mechanism is provided only on the peripheral surface on one end side in the width direction, the insertion direction of the end on the opposite side is There was a possibility that the lock could be released by a slight free movement.
[0007]
In order to prevent this, it is necessary to provide locking mechanisms at both ends in the width direction of the frame. However, providing the lock mechanisms at a plurality of locations not only complicates the structure, but also may cause rattling due to a slight misalignment between the lock mechanisms.
[0008]
If such rattling occurs, the electrical connection between the frame and the socket side becomes unstable, making it difficult to stably guide the noise component transmitted through the frame to the ground on the board side. There was concern.
[0009]
The present invention has been made in view of the above points, and an object of the present invention is to improve the connection reliability of the shield connector with the socket and to effectively remove the noise component at the time of connection with the socket. It is to provide a socket and a connection structure thereof.
[0010]
[Means for Solving the Problems]
The first means of the present invention accommodates a terminal portion provided with a connector electrode, a shield disposed at a predetermined interval around the cross section of the terminal portion, and a base portion of each of the terminal portion and the shield. And a plug body in which the respective distal ends of the terminal portion and the shield protrude from one end thereof, and a rod having an engagement claw protruding from one side surface in the width direction of the shield at the distal end. Is a shield connector in which the engaging claw at the tip of the plug main body is movable in the protruding and entering directions by pressing a pressing portion provided on one side surface of the plug body.
[0011]
In this means, the engaging claw is projected from one side surface in the width direction of the shield, and such a locking mechanism is provided at only one place. This simplifies the structure as compared with a configuration in which a lock mechanism is provided at two or more locations of the shield connector.
[0012]
According to a second means of the present invention, the socket for connecting the plug-side shield connector in the first means is provided on the insertion port into which the tip of the shield is inserted, and on the inner peripheral surface of the insertion port, An engaging portion that engages an engaging claw, and a pressing member that elastically contacts the distal end surface of the shield in the pulling-out direction of the connector at the insertion port are provided. .
[0013]
Thus, by providing the pressing portion that elastically presses against the distal end surface of the shield, once the plug-side engaging claw and the socket-side engaging portion are in the engaged state, This pressing force further strengthens this engagement, preventing easy removal of the shield connector from the socket. In particular, even a shielded connector provided with only one locking mechanism can achieve stronger engagement with respect to the force in the pulling direction.
[0014]
According to a third means of the present invention, in the second means, the pressing member is composed of a conductive leaf spring. By configuring the pressing member with a conductive material in this way, the tip of the shield and the pressing member are brought into surface contact, so that noise components from the shield can be efficiently released to the outside of the socket. Can do.
[0015]
According to a fourth means of the present invention, in the second means, the insertion port is provided in a socket main body for mounting on the circuit board, and the socket body is pressed against the surface on the mounting side of the socket main body. A shield electrode that is electrically connected to the member is provided.
[0016]
In this way, the shield electrode can be selectively connected to the electrode on the circuit board side by bringing the pressing member into conduction with the shield electrode. Thereby, when the ground circuit is provided on the circuit board side, the noise component of the shield can be efficiently emitted to the circuit board side.
[0017]
According to a fifth means of the present invention, in the fourth means, the pressing member is a conductive leaf spring, and one end of the leaf spring is exposed from the socket body to provide a shield electrode. .
[0018]
As described above, by configuring the pressing member and the shield electrode with an integral leaf spring, it is possible to realize a connection structure between the plug and the socket having a high connection reliability and a high shielding effect with a small number of parts.
[0019]
Further, the sixth means of the present invention has a structure in which the plug is provided with a protrusion urged outward from the other side surface on the surface opposite to the engaging claw of the shield. This ensures positioning of the other side of the shield when it is attached to the socket.
[0020]
According to a seventh aspect of the present invention, there is provided a plug-side shield connector, wherein a conductive shell is provided on an outer periphery of the terminal portion, and a guide sleeve for accommodating the terminal portion. It consists of a shield connector on the socket side, characterized in that a conductive shell is provided on the inner periphery of the sleeve, and one of each conductive shell is provided with a raised portion that protrudes with respect to the other . Thereby, the noise component of one connector is emitted to the other through each conductive shell, and a connection structure between the plug and the socket having a high shielding effect can be provided.
[0021]
According to an eighth means of the present invention, the raised portion is provided at a fulcrum position when an external force is generated when the shield connector on the plug side and the shield connector on the socket side are fitted. Even when an external force is generated in the cable or the like in the fitted state, conduction is maintained at least at the raised portion at the fulcrum position between the metal shells, so a plug-socket connection structure having a better shielding effect can be achieved. Can be provided.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
【Example】
FIG. 1 is a perspective view of a plug according to an embodiment of the present invention from an upper right oblique direction, FIG. 2 is an oblique view from the upper left oblique direction, FIG. 3 is a partially cutaway plan view, and FIG. FIG. 5 is a sectional view taken along the line VV in FIG. 4, FIG. 6 is a perspective view taken from the upper right side of the section taken along the line VI-VI in FIG. 5, and FIG. It is the top view which showed the state with which it was mounted | worn with the partial cross section.
[0024]
The external appearance of the connector of the present embodiment is as shown in FIG. 1, and has a plug body 1 obtained by molding synthetic resin. A coaxial cable 2 is attached to the rear end of the plug body 1. A shield 3 obtained by processing a conductive metal such as an aluminum alloy protrudes from the tip of the plug body 1.
[0025]
An engaging claw 5 is provided from one side surface of the shield 3 in the width direction. The engaging claw 5 can be pulled in inward direction of the shield 3 (left side in FIG. 1) by pressing a pressing portion 6 formed in an arcuate convex shape provided on the side surface of the plug body 1. It has become.
[0026]
Next, the internal mechanism of the engaging claw 5 will be described with reference to FIG.
The engaging claw 5 is provided at the tip of a rod 5a made of a metal material or hard plastic. The base end of this rod 5 a is pivotally supported in the plug body 1. A spring 10 bent in a U-shape is fitted in a gap between the rod 5a and the plug main body 1, and urges the rod 5a outward. The opposite surface of the rod 5 a to the spring 10 is in contact with the inner surface of the pressing portion 6. A cut portion 1a is provided at the tip of the pressing portion 6 on the side surface of the plug main body 1, so that the pressing portion 6 can be pushed inward of the main body. That is, by pressing the pressing portion 6 with the finger pad, the rod 5a is rotated inwardly about the shaft support portion 5b against the spring 10, and as a result, the engaging claw 5 is brought into the side surface of the shield 3. It can be pulled in and unlocked.
[0027]
On the other side surface of the shield 3 in the width direction, the protrusion 7 of the leaf spring 7a is exposed from the window 8 (see FIG. 2). The base of the leaf spring 7a is fixed in the plug body 1 as shown in FIG. 3, and the protrusion 7 provided at the tip thereof is urged outward from the window portion 8 by the elasticity of the leaf spring 7a. Exposed in a state.
[0028]
A housing projection 4 projects from the plug body 1 in parallel to the axial direction of the shield 3 at a predetermined interval on the inner side of the shield 3 projecting from the plug body 1 (see FIG. 1). ). A terminal hole 4a is formed in the front end surface of the housing convex portion 4, and a connector electrode 4b is provided in the terminal hole 4a. The outer periphery of the housing convex portion 4 facing the shield 3 is substantially covered with a terminal shell 4d formed of a conductor such as metal.
[0029]
As shown in FIG. 4, the socket has a socket body 11 obtained by molding a synthetic resin. The socket body 11 is provided with an insertion port 12 in the front, and the housing projection 4 is inserted into the internal space of the insertion port 12 between the shield 3 and the housing projection 4 when the connector is mounted. A guide sleeve 13 for guiding is projected along the inner surface of the insertion port 12.
[0030]
Further, recesses 12 a and 12 b are provided on the inner peripheral surface of the insertion port 12. Of these, one recess 12a is for engaging the engaging claw 5 protruding from the shield 3, and the other recess 12b is adapted to receive the projection 7 of the leaf spring 7a.
[0031]
Each inner surface of the guide sleeve 13 is provided with an inner shell 18 made of a conductive material such as metal, and is formed so as to come into contact with the terminal shell 4d in multiple faces when the housing convex portion 4 is inserted.
[0032]
Further, a socket-side terminal 14 projects from the inner space of the guide sleeve 13, and the terminal 14 is inserted into the terminal hole 4 a of the connector-side housing convex portion 4. The internal electrode 14a provided on the peripheral surface 14 and the connector electrode 4b provided on the inner peripheral surface of the terminal hole 4a are brought into contact with each other, thereby realizing electrical contact.
[0033]
In addition, as shown in FIG. 4, by providing a raised portion 18a on the inner surface of the inner shell 18 at a position that becomes a fulcrum when an external force is applied in the fitting state of the plug and the socket, Also, the contact stability between the terminal shell 4d and the inner shell 18 can be ensured. In the figure, the raised portion 18a is provided on the inner shell 18 side on the socket side, but may be provided on the terminal shell 4d side on the plug 1 side.
[0034]
The socket body 11 has board mounting blocks 11a and 11b at both ends in the width direction. The board mounting blocks 11a and 11b are provided with screw holes 11c and 11d in parallel with the connector fitting direction. ing. Screw holes 11e and 11f are also formed in a direction perpendicular to the axial direction. Therefore, the socket can be attached in a state where the insertion port 12 is laid sideways or standing with respect to the circuit board.
[0035]
On the bottom surface on the rear end side of the socket body 11, an external electrode 15 that is electrically connected to the internal electrode 14 a provided on the terminal 14 is provided. The external electrode 15 is obtained by plating a conductive metal plate such as phosphor bronze and bending it into an L shape, and is joined to an electrode (not shown) formed on a circuit board (not shown) with solder or the like. Yes.
[0036]
As shown in FIGS. 5 and 6, spring members 16 a and 16 c as pressing members are attached to the deepest portion of the insertion opening 12. The spring members 16a and 16c can be obtained by bending a conductive metal plate such as phosphor bronze into a Z shape. The front end surface of the shield 3 of the connector is in contact with the pressing surfaces of the spring members 16a and 16c, and when the shield 3 is pushed in, the front end surface of the shield 3 in the repulsion direction (withdrawal direction) due to its spring property. It has a function to energize.
[0037]
One end of each of the spring members 16a and 16c is bent and exposed in an L shape from the bottom surface of the socket body 11 to constitute shield electrodes 16b and 16d (see FIG. 4). The shield electrodes 16b and 16d can be selectively connected to a ground electrode (not shown) of the circuit board with solder or the like.
[0038]
In this embodiment, when the connector is mounted on the socket, the connector shield 3 is first guided by the guide sleeve 13 and inserted into the insertion port 12 of the socket. When the tip of the shield 3 is inserted more than a certain amount, the tip surface of the shield 3 comes into contact with the pressing surfaces of the spring members 16a and 16c. When the insertion of the shield 3 is continued against the repulsive force of the spring members 16a and 16c, the engaging claw 5 is fitted into the recess 12a by the elastic force of the spring 10. At this time, even if the insertion of the shield 3 is stopped, the engaging claw 5 engaged with the recess 12a is strongly engaged with the recess 12a by the repulsive force of the spring materials 16a and 16c.
[0039]
In this embodiment, since the repulsive force of the spring members 16a and 16c strengthens the engagement between the engagement claw 5 and the recess 12a, the locking mechanism by the engagement claw 5 is an inadvertent connector only at one place. Can be prevented from falling off.
[0040]
Further, since the contact surfaces of the spring members 16a and 16c are in contact with the front end surface of the shield 3, a wide conduction cross section can be secured, and noise components transmitted through the shield 3 can be removed to the outside. It is effective.
[0041]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while the connection reliability with the socket of a shield connector increases, the removal of the noise component at the time of the connection of a connector and a socket is efficiently realizable.
[Brief description of the drawings]
FIG. 1 is a perspective view of a shield connector (plug) according to an embodiment of the present invention from an upper right side of the shield. FIG. 2 is a perspective view of an upper side of a shield connector (plug) according to the embodiment. FIG. 4 is a perspective view of the shield connector (socket) in the embodiment from the lower right side. FIG. 5 is a diagram showing the shield connector (socket) in the embodiment. 4 is a cross-sectional view taken along the line VV of FIG. 4. FIG. 6 is a perspective view of the shield connector (socket) in the embodiment from the upper right oblique line in the cross section of the VI-VI line of FIG. Plan view showing a partially cut state [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plug main body 2 Coaxial cable 3 Shield 4 Housing convex part 4a Terminal hole 4b Connector electrode 4d Terminal shell 5 Engagement claw 5a Rod 6 Press part 7 Protrusion part 7a Leaf spring 8 Window part 10 Spring 11 Socket main body 11a, 11b For board mounting Blocks 11c and 11d Screw holes 11e and 11f Screw holes 12 Insertion holes 12a and 12b Recess 13 Guide sleeve 14 Terminal 14a Internal electrode 15 External electrodes 16a and 16c Spring material (pressing member)
16b, 16d Shield electrode 18 Inner shell 18a Raised portion

Claims (7)

A terminal portion provided with a connector electrode; a shield disposed at a predetermined interval around a cross section of the terminal portion; and a base portion of each of the terminal portion and the shield; Each plug has a plug body projecting from one end thereof, and a rod having an engagement claw projecting from one side surface of the shield in the width direction. The rod is provided on one side surface of the plug body. By pressing the pressed part, the engaging claw at the tip can be moved in the protruding and entering direction ,
The socket-side shield connector for connecting the plug body includes an insertion port into which the tip of the shield is inserted, an engagement portion that is provided on an inner peripheral surface of the insertion port, and engages the engagement claw, A shield connector comprising: a pressing member that is elastically contacted with a leading end surface of the shield in a pulling-out direction of the connector at an insertion port . The shield connector according to claim 1, wherein the pressing member is made of a conductive leaf spring. The insertion port is provided in a socket body for mounting on a circuit board, and a shield electrode that is electrically connected to the pressing member is provided on a surface of the socket body on the side of mounting on the circuit board. The shielded connector according to claim 1 . 4. The shield connector according to claim 3, wherein the pressing member is a conductive leaf spring, and the shield electrode is provided with one end of the leaf spring exposed from the socket body. The shield connector according to claim 1, further comprising a protruding portion urged outwardly on the other side surface of the shield in the width direction. A plug-side shield connector having a conductive shell provided on the outer periphery of the terminal portion, and a guide sleeve for receiving the terminal portion, and a conductive shell on the inner periphery of the guide sleeve consists a socket side shield connector, characterized in that is provided, on one of each of the conductive shell, according to claim 1, characterized in that a ridge raised with respect to the other Shield connector. 7. The shield connector according to claim 6 , wherein the raised portion is provided at a fulcrum position when an external force is generated in a fitting state between the plug-side shield connector and the socket-side shield connector.

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