JP4287540B2 - Shield connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector provided with a shielding frame.
[0002]
[Prior art]
2. Description of the Related Art There is known a connector (consisting of separate plugs and receptacles, both of which are hereinafter collectively referred to as “shield connector”) with a shield frame attached around the terminal portion at intervals.
[0003]
In this prior art, a thin metal plate is formed and bonded into a flat rectangular cross section to obtain a shielding frame, and the physical contact strength with the connector is maintained by the elasticity of the thin plate of this frame. Has been.
[0004]
However, such a conventional shielded connector generally does not have a locking mechanism, and it is very easy to remove it from the receptacle simply by gripping the connector body (plug) of the shielded connector and pulling it in the anti-receptacle direction. It was possible to pull out the plug.
[0005]
Such a structure is sufficiently effective for consumer use such as cable connection between a digital video camera and a personal computer that are frequently inserted and removed in ordinary households, but is used for monitoring traffic conditions in road facilities, financial institutions, large In cable connection for business use such as a security camera in a large-scale retail store or the like, securing of fitting strength, that is, connection reliability is insufficient. In such business use, the service life is long, and durability for insertion / removal is required in preparation for repeated relocation.
[0006]
In addition, as described above, a metal frame consisting of thin plates is molded and bonded to obtain a frame for shielding, so the joint between the metal plates expands and repeats frequent insertion and removal over a long period of time, reducing the shielding effect. There was a problem.
[0007]
First of all, regarding the strength of fitting, it is considered to provide a mechanism that locks the plug and the receptacle when connected by providing a movable protrusion on the frame side of the shield connector and providing an engagement hole in the corresponding part on the receptacle side. It is done. 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.
[0008]
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.
[0009]
When such rattling occurs, the electrical connection between the frame and the receptacle side becomes unstable, and it becomes difficult to stably guide the noise component transmitted through the frame to the ground on the substrate side. There was concern.
[0010]
On the other hand, in terms of the shielding effect, the shield frame can be configured by robust die casting instead of the thin plate-shaped molding / joining member. However, in that case, since ductility is poor as compared with the case of using a thin plate, the accuracy is strictly required for the entire part to be fitted. In particular, the positional relationship between the shield frame and the contact holding part inside it is determined at the time of manufacture, which causes excessive stress on both contact parts when mated with the mating connector, and frequently occurs over a long period of time. During repeated insertion and removal, there was a risk of deformation in both parts.
[0011]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object of the present invention is to withstand long-term abuse on the plug side of the shield connector, particularly on the plug side, and to improve connection reliability with the receptacle side. It is an object of the present invention to provide a connection structure using a shield connector that is extremely effective for removing noise components during connection.
[0012]
[Means for Solving the Problems]
The first means of the present invention is a frame-like terminal portion in which a plurality of electrodes that come into contact with the mating connector are disposed inside, a die-cast shield disposed at intervals around the terminal portion,
A plug body that accommodates the respective base portions of the frame-shaped terminal portion and the die-cast shield and has the respective ends of the frame-shaped terminal portion and the die-cast shield project from one end thereof, and the width of the die-cast shield The rod is provided with an engaging claw protruding from one side of the direction at the tip, and the rod presses a pressing portion provided on one side of the plug body, so that the engaging claw at the tip protrudes. The shield connector is configured to be movable in the entry direction, and the frame-shaped terminal portion is held so as to be swingable with respect to the die-cast shield.
[0013]
In this means, a sufficient noise component is removed by a robust and strong die-cast shield, and the frame-shaped terminal portion is held so as to be swingable with respect to the die-cast, so that the other side There is no stress in each part even when fitted to the receptacle.
[0014]
According to a second means of the present invention, the frame-shaped terminal portion is configured to be swingable by disposing an elastic member around the frame-shaped terminal portion and in contact with the inner surface of the die-cast shield. .
[0015]
With this configuration, the frame-shaped terminal portion can swing with sufficient displacement within the die-cast shield, and the mating with the mating receptacle can be smoothly performed, so that no stress is generated in the respective portions.
[0016]
The third means of the present invention has a structure in which the cable connection side base portion of the frame-shaped terminal portion is held in the plug body via the elastic member.
As a result, the frame-shaped terminal portion can swing with its base portion serving as a fulcrum, so that the stress at the time of mating the mating connector can be extremely reduced.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
【Example】
1 is a perspective view of the plug in the embodiment of the present invention from the upper right oblique side, FIG. 2 is also a perspective view from the upper left oblique direction, FIG. 3 is also a partially cutaway plan view,
4 is a perspective view from the lower right side of the receptacle in the embodiment of the present invention, FIG. 5 is a sectional view taken along the line VV in FIG. 4, and FIG. 6 is a perspective view from the upper right side of the section taken along the line VI-VI in FIG. FIGS. 7 and 7 are plan views partially showing a state in which the plug is mounted on the receptacle.
[0019]
The external appearance of the plug of the present embodiment is as shown in FIG. 1, and has a plug body 1 obtained by molding synthetic resin. A shield cable 2 is attached to the rear end of the plug body 1. A die-cast shield 3 obtained by a die-casting method protrudes from the tip of the plug body 1.
[0020]
An engaging claw 5 is provided from one side surface of the die-cast shield 3 in the width direction. The engaging claw 5 is pulled in inward direction of the die-cast 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. Is possible.
[0021]
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 20 is fitted in a gap with the plug body 1 in the middle of the rod 5a to urge the rod 5a outward. The opposite surface of the rod 5 a to the spring 20 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 inward about the shaft support portion 5b against the spring 20, and as a result, the engaging claw 5 is moved to the side surface of the die cast shield 3. It can be pulled in and unlocked. Reference numeral 26 denotes a clamp portion.
[0022]
On the other side surface of the die cast 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.
[0023]
An elastic bush 25 made of flexible soft vinyl chloride or rubber material is provided on the inner back side of the die-cast shield 3 protruding from the plug body 1 and is in contact with the frame-like terminal. The part 4 protrudes in parallel with the axial direction of the die cast shield 3 (see FIGS. 1 and 3). A slit 25b is provided on the distal end side of the elastic bush to increase the elasticity. A terminal hole 4a is formed in the distal end surface of the frame-shaped terminal portion 4, and an electrode 4b is provided inside the terminal hole 4a. The outer periphery of the frame-like terminal portion 4 facing the die cast shield 3 is substantially covered with a terminal shell 4d formed of a conductor such as metal.
[0024]
As shown in FIG. 4, the receptacle to which the plug is mated has a receptacle body 11 obtained by molding a synthetic resin. The receptacle body 11 is provided with an insertion port 12 on the front surface, and enters the space inside the insertion port 12 between the die-cast shield 3 and the frame-shaped terminal portion 4 when the plug is mounted. A guide sleeve 13 that guides the terminal portion 4 protrudes along the inner surface of the insertion port 12.
[0025]
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 die cast shield 3, and the other recess 12b is adapted to receive the projection 7 of the leaf spring 7a.
[0026]
Each inner surface of the guide sleeve 13 is provided with an inner shell 18 made of a conductor such as metal, and is formed so as to come into contact with the terminal shell 4d in multiple faces when the frame-like terminal portion 4 is inserted. .
[0027]
Further, a receptacle-side terminal base 14 projects from the inner space of the guide sleeve 13, and the terminal base 14 is inserted into the terminal hole 4 a of the plug-side frame-like terminal portion 4. Thus, the internal electrode 14a provided on the peripheral surface of the terminal base 14 and the electrode 4b provided on the internal peripheral surface of the terminal hole 4a are brought into contact with each other, and electrical connection is realized.
[0028]
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 a state where the plug and the receptacle are fitted, 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 receptacle side, but it may be provided on the terminal shell 4d side on the plug 1 side.
[0029]
The receptacle body 11 has substrate mounting blocks 11a and 11b at both ends in the width direction, and the board mounting blocks 11a and 11b are provided with screw holes 11c and 11d in parallel with the plug fitting direction. ing. Screw holes 11e and 11f are also formed in a direction perpendicular to the axial direction. Therefore, the receptacle can be attached in a state where the insertion port 12 is placed sideways or upright with respect to the circuit board.
[0030]
On the bottom surface of the receptacle body 11 on the rear end side, an external electrode 15 electrically connected to the internal electrode 14a provided on the terminal base 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.
[0031]
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 tip surfaces of the die cast shield 3 of the plug are in contact with the pressing surfaces of the spring members 16a and 16c. When the die cast shield 3 is pushed in, the die is pushed in the repulsion direction (pulling direction) by its spring property. It has a function of urging the tip surface of the cast shield 3.
[0032]
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 receptacle body 11, thereby constituting 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.
[0033]
In this embodiment, when the plug is mounted on the receptacle, the die-cast shield 3 on the plug side is first guided by the guide sleeve 13 and inserted into the insertion slot 12 of the receptacle. In this process, the plug-side frame-like terminal portion 4 is inserted between the receptacle-side guide sleeve 13 and the terminal base 14, and the base portion of the frame-like terminal portion 4 is in the elastic bush base portion 25a. Since rocking is possible, excessive stress does not occur during the engagement. When the tip of the die-cast shield 3 is further inserted more than a certain amount, the tip surface of the die-cast shield 3 comes into contact with the pressing surfaces of the spring materials 16a and 16c. When the insertion of the die cast 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 20. At this time, even if the insertion of the die-cast shield 3 is stopped, the engaging claw 5 engaged with the recess 12a is in a strong engagement state with the recess 12a due to the repulsive force of the spring members 16a and 16c.
[0034]
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.
[0035]
Further, since the contact surfaces of the spring members 16a and 16c are in contact with the tip surface of the die cast shield 3, a wide conduction cross section can be secured, and the noise components transmitted through the die cast shield 3 can be externally transmitted. It is effective for removal.
[0036]
【The invention's effect】
According to the present invention, in the shield connector, the connection reliability between the plug and the receptacle is increased, and the removal of noise components at the time of connection between the plug and the receptacle can be efficiently realized. Particularly, since the frame-like terminal portion can swing with its base portion serving as a fulcrum while having a robust die-cast shield, the stress at the time of mating the mating connector can be extremely reduced. Therefore, the failure rate and contact failure rate due to deformation accompanying insertion / removal of the connector can be reduced, and a shield connector with extremely high reliability can be obtained.
[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 a shield connector (plug) from an upper left side of the embodiment. FIG. 4 is a perspective view of the shield connector (receptacle) from the lower right side of the shield connector (receptacle) in the embodiment. FIG. 5 is a diagram showing the shield connector (receptacle) in the embodiment. Fig. 6 is a cross-sectional view taken along the line VV of Fig. 4. Fig. 6 is a perspective view of the shield connector (receptacle) in the embodiment as viewed from the upper right in the VI-VI line cross section of Fig. 5. Fig. 7 Plan view showing a partially cut state [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plug main body 2 Shield cable 3 Die-cast shield 4 Frame-shaped terminal part 4a Terminal hole 4b Electrode 4d Terminal shell 5 Engagement claw 5a Rod 6 Press part 7 Protrusion part 7a Leaf spring 8 Window part 11 Receptacle main body 11a, 11b For board mounting Blocks 11c, 11d Screw holes 11e, 11f Screw holes 12 Insertion holes 12a, 12b Recess 13 Guide sleeve 14 Terminal base 14a Internal electrode 15 External electrodes 16a, 16c Spring material (pressing member)
16b, 16d Shielding electrode 18 Inner shell 18a Raised portion 20 Spring 25 Elastic bushing 25a Elastic bushing base portion 25b Slit 26 Clamping portion

Claims (2)

A frame-like terminal portion in which a plurality of electrodes in contact with the mating connector are disposed;
A die-cast shield disposed at intervals around the frame-shaped terminal portion;
A plug body that accommodates the respective base portions of the frame-shaped terminal portion and the die-cast shield, and protrudes the respective tips of the frame-shaped terminal portion and the die-cast shield from one end thereof,
An engagement claw that protrudes from one side surface of the die cast shield in the width direction is provided at the tip, and the engagement claw moves in the protruding and entering direction by pressing a pressing portion provided on one side surface of the plug body. Made possible with rods,
The frame-shaped terminal portion is
An elastic member is disposed at a position around the inner surface of the die-cast shield and in contact with the inner surface,
A base portion of the frame-shaped terminal portion is held in the plug body via the elastic member;
Shielded connector, characterized in that the frame-like terminal portion is held so as to be swingable with respect to the die-cast shield.   A frame-like terminal portion in which a plurality of electrodes in contact with the mating connector are disposed;
  A die-cast shield disposed at intervals around the frame-shaped terminal portion;
  A plug body that accommodates the respective base portions of the frame-shaped terminal portion and the die-cast shield, and protrudes the respective tips of the frame-shaped terminal portion and the die-cast shield from one end thereof,
  An engagement claw that protrudes from one side surface of the die cast shield in the width direction is provided at the tip, and the engagement claw moves in the protruding and entering direction by pressing a pressing portion provided on one side surface of the plug body. Made possible with rods,
  The die cast shield is
  A protrusion that is urged outward from the window formed on the other side opposite to the width direction is exposed,
  When the plug body is inserted into the insertion hole of the receptacle body,
  The tip surface of the die cast shield is in contact with the pressing surface of the spring material attached to the deepest part of the insertion port, and is biased in the pulling direction by the spring property of the spring material,
  The shield connector is characterized in that the engaging claw engages with a concave portion formed in the insertion port while the projection contacts and urges the inner peripheral surface of the insertion port.

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