TWI543477B - Coaxial electrical connector - Google Patents

Description

Coaxial type electrical connector

The present invention relates to a coaxial type electrical connector for connecting a cable-like signal transmission medium such as a thin-wire coaxial cable.

In general, a cable-like signal transmission medium such as a thin-wire coaxial cable is widely used as a signal transmission medium for various electronic devices or electric devices such as a mobile phone. For example, the following Patent Document 1 and the like are known to be useful for the cable. The linear signal transmission medium is efficiently connected to the coaxial type electrical connector of the printed wiring substrate. In the coaxial electrical connector described in Patent Document 1, an outer conductor case formed of a substantially hollow cylindrical member is attached to the outer side of the insulating case, and the case cover portion is openably and closably coupled to the outer conductor case. The cylindrical opening portion is attached to the conductor mounting portion of the internal contact member at the end portion of the cable-like signal transmission medium, and is then electrically connected by bending the conductor holding arm, and then the housing is opened. The lid is overturned for occlusion, thereby completing the assembly.

According to the coaxial type electrical connector having such a configuration, since the solder connection work for connecting the conductive contact member and the coaxial cable is omitted, the assembly workability is improved, and the problem of the environmental viewpoint caused by the disposal of the solder material is solved. Moreover, the advantage that the offset of the characteristic impedance due to the difference in the amount of solder used is lost is obtained.

However, in the conventional coaxial type electrical connectors, especially in recent years, with the transmission of signals In the case of high-frequency or low-speed miniaturization of the high-frequency connector, the matching ratio of the characteristic impedance of the transmission signal (VSWR: voltage standing wave ratio) tends to be unmatched, and it becomes difficult to maintain a good high frequency. characteristic.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2011-40262

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a coaxial type electrical connector which is simple in construction and which can stably obtain good signal transmission characteristics.

In order to achieve the above object, an electrical connector of the present invention has an insulative housing for connecting a terminal portion of a cable-like signal transmission medium, and a signal-conducting contact for connecting a center conductor of the cable-like signal transmission medium is mounted on the insulative housing. The cover is provided with an outer cover portion covering the signal conductive contact member in an openable and closable manner, and an elastic pressing portion is disposed on the outer cover portion; the elastic pressing portion elastically contacts the coaxial cable The center conductor of the wire presses the center conductor of the coaxial cable toward the signal conductive contact.

According to the invention having the above configuration, since the outer casing cover portion constituting the dielectric is disposed adjacent to the center conductor of the coaxial cable, the dielectric constant in the vicinity of the center conductor of the coaxial cable is lowered, and the electrostatic capacitance is reduced, by adjusting the outer casing cover The thickness of the portion is appropriately adjusted with respect to the characteristic impedance of the coaxial cable, and the matching ratio (VSWR) of the characteristic impedance of the transmission signal is easily and appropriately matched, and the high-frequency signal is transmitted well.

Further, at the same time, since the center conductor of the coaxial cable is directly pressed by the elastic pressing portion of the casing cover portion, it is held between the signal-conducting contact member, and thus is bent by the arm of the conventional conductor. The plastic deformation force holder at the time of folding increases the pressing force of the center conductor of the coaxial cable, and lowers the overall height of the electrical connector, and the bullet of the outer cover portion The elastic pressing action of the sexual pressing portion stably maintains the pressing action of the outer casing cover portion for a long period of time.

Moreover, it is preferable that the elastic pressing portion of the present invention is formed in a protruding shape toward the signal conductive contact.

According to this configuration, the elastic pressing portion of the casing cover portion reliably abuts against the center conductor of the coaxial cable.

Furthermore, it is preferable that the insulative housing of the present invention is provided with a conductive housing covering the outer surface of the insulative housing, and the housing cover portion that is overlapped from the outer side of the housing cover portion is openably and closably disposed on the conductive portion. The inner casing of the casing cover is crimped to the elastic pressing portion when the casing cover is closed; the abutting receiving portion of the casing cover is adjacent to the elastic pressing portion The ground cover is provided on the outer casing cover. Moreover, it is preferable that the abutting receiving portion is disposed adjacent to the elastic pressing portion in a direction in which the center conductor of the coaxial cable extends and an orthogonal direction thereof.

According to this configuration, the casing cover portion in the closed state is not only pressed against the elastic pressing portion of the casing cover portion but also in contact with the abutting receiving portion, so that the height of the electrical connector is further improved.

Furthermore, in the invention, it is preferable that the elastic pressing portion provided in the cover portion of the casing is configured to be in contact with the center conductor of the coaxial cable, and the electrical connector provided in the fitting object The connecting portions of the signal conductive contacts are opposite.

According to this configuration, the center conductor of the coaxial cable that receives the pressing action from the elastic pressing portion of the cover portion is pressed to the connection portion of the signal conductive contacts, whereby the signal transmission circuit becomes shorter and the electrical characteristics are improved. Therefore, the signal transmission characteristics of the electrical connector are improved.

As described above, the present invention is installed in a cable for connecting signal transmission The insulative housing of the signal conducting contact of the core conductor is openably and closably provided with a housing cover portion covering the signal conductive contact member, and the housing cover portion is provided with an elastic pressing portion elastically contacting the center conductor of the coaxial cable and pressing The housing cover portion constituting the dielectric is disposed adjacent to the center conductor of the coaxial cable, the dielectric constant is reduced, and the static capacitance is reduced. By adjusting the thickness of the cover portion of the housing, the characteristic impedance of the transmission signal can be easily and appropriately obtained. The matching ratio (VSWR) is matched, whereby the transmission of the high-frequency signal is performed well, and on the other hand, the direct and elastic pressing action from the elastic pressing portion of the cover portion to the center conductor of the coaxial cable is performed. Since the entire connector is low in height and the pressing action of the cover portion is stably maintained for a long period of time, the configuration is simple and stable, and good signal transmission characteristics can be stably obtained, and the reliability of the electrical connector can be improved at a low cost.

10‧‧‧ Plug connector (coaxial type electrical connector)

11‧‧‧Insulated casing

11a‧‧‧Insulated body

11b‧‧‧Insert Insertion

11c‧‧‧Shell containment room

11c1‧‧‧Cable bearing

11d‧‧‧ casing cover

11e‧‧‧Elastic press

11f‧‧‧Abutment bearing department

12‧‧‧Internal conductor contacts (signal conductive contacts)

12a‧‧‧ Cable Mounting Department

12b‧‧‧elastic springs

13‧‧‧Shield housing (earth contact)

13a‧‧‧External conductor housing

13a1‧‧‧Sheet insertion

13b‧‧‧Shell cover

13b1‧‧‧Connected components

13b2‧‧‧ front cover

13b3‧‧‧1st fixed retaining plate

13b4‧‧‧2nd fixed retaining plate

13b5‧‧‧Shell press

13b6‧‧‧ cable protection arm

SC‧‧‧Small-wire coaxial cable (cable signal transmission medium)

Sca‧‧‧Cable center conductor (signal line)

SCb‧‧‧Cable Shield Conductor (Shielded Wire)

20‧‧‧Socket connector (object side electrical connector)

21‧‧‧Insulated casing

22‧‧‧ Signal Conductive Contacts

22a‧‧‧Connecting the foot

23‧‧‧ Grounding contact for grounding

23a‧‧‧Connecting the foot

1 is an external perspective view showing a state in which a coaxial coaxial cable is connected to a coaxial electrical connector (plug connector) according to an embodiment of the present invention.

2 is an external perspective view showing a plug connector in a state in which the coaxial cable shown in FIG. 1 is connected from the lower side of the back surface.

Fig. 3 is a plan explanatory view showing a plug connector in a state in which the thin-wire coaxial cable shown in Figs. 1 and 2 is connected.

Fig. 4 is a cross-sectional explanatory view taken along line IV-IV of Fig. 3.

Figure 5 is a partial enlarged view of a region indicated by V in Figure 4.

Fig. 6 is a longitudinal sectional view taken along line IV-IV of Fig. 3.

7(a) and 7(b) show the insulating case of the coaxial type electrical connector (plug connector) according to the first embodiment of the present invention shown in Figs. 1 to 6 in a state in which the cover portion of the casing is closed. Construction, (a) It is an external perspective view which shows from the upper side of the back side, and (b) is an external perspective view which shows from the upper side of the front side.

Fig. 8 is an external perspective view showing the upper side of the front side of the open state of the outer casing cover portion of the insulating casing shown in Fig. 7.

Fig. 9 is an external perspective view showing the initial state before the thin-wire coaxial cable is connected to the coaxial type electrical connector (plug connector) shown in Figs. 1 to 8 from the upper side of the front side.

Fig. 10 is a front elevational view showing the coaxial type electrical connector (plug connector) shown in Fig. 9.

FIG. 11 is an external perspective view showing an example of a thin-wire coaxial cable used in the coaxial electrical connector (plug connector) according to the first embodiment of the present invention.

Fig. 12 is an external perspective view showing the state in which the thin-wire coaxial cable is connected to the coaxial type electrical connector (plug connector) shown in Fig. 9 from the upper side of the front side.

Fig. 13 is a plan explanatory view of the coaxial type electrical connector (plug connector) shown in Fig. 12.

Fig. 14 is a perspective external perspective view showing an example of an object side electrical connector (socket connector) to which a coaxial type electrical connector (plug connector) according to an embodiment of the present invention is fitted.

Fig. 15 is an external perspective explanatory view showing a state in which a coaxial type electrical connector (plug connector) according to an embodiment of the present invention is fitted to an object side electrical connector (socket connector) from the upper side of the back side.

Fig. 16 is a cross-sectional explanatory view corresponding to Fig. 4 showing a state in which a coaxial type electrical connector (plug connector) according to an embodiment of the present invention is fitted to an object side electrical connector (socket connector).

Figure 17 is a partial enlarged view of a region indicated by XVII in Figure 16.

Hereinafter, an explanation will be given of an embodiment in which the present invention is applied to a coaxial type electrical connector using a thin-wire coaxial cable as a signal transmission medium in detail.

(About the overall structure of the coaxial type electrical connector)

First, the plug connector 10 of the coaxial type electrical connector according to the first embodiment of the present invention shown in Figs. 1 to 13 is connected to the terminal portion of the thin-wire coaxial cable SC as a cable-like signal transmission medium, from above. The socket connector 20 (see FIGS. 14 to 17), which is a target-side electrical connector that is mounted on a predetermined printed wiring board, is inserted and removed. The fitting/unplugging operation of the plug connector 10 of the receptacle connector 20 as an example of the target-side electrical connector is performed in a direction substantially orthogonal to the plane of the printed wiring board.

More specifically, the connector body portion constituting the main fitting portion of the plug connector 10 is formed into a cylindrical shape in a schematic shape, and the connector body portion of the plug connector 10 having a substantially cylindrical shape is The terminal portion of the thin-wire coaxial cable SC is connected to one of the outer sides in the radial direction, and the plug is disposed so as to face the upper position of the receptacle connector 20 as the target-side electrical connector in a state in which the thin-wire coaxial cable SC is connected. Connector 10. Further, the plug connector 10 as a whole is lowered in a direction substantially orthogonal to the outer surface of the printed wiring board, whereby the lower end portion of the plug connector 10 is opposite to the upper side portion of the receptacle connector (object side electrical connector) 20. The fitting state (refer to Fig. 15). As described above, the plug connector 10 is inserted into the socket connector 20 from above, and the terminal portion of the thin coaxial cable SC is connected to the printed wiring board (not shown) through the plug connector 10 and the receptacle connector 20. Wiring pattern conductive path.

Here, the direction in which the plug connector 10 is inserted into the receptacle connector (object-side electrical connector) 20 is set to "downward direction", and the direction in which the plug connector 10 is pulled out is oppositely set to "upward direction". Further, in the plug connector 10 itself, the portion to which the end portion of the thin coaxial cable SC is connected is referred to as a "front side portion", and the portion opposite thereto is referred to as a "back side portion", and further, The direction of the "back side portion" toward the "front side portion" is set to "the connector front direction", and the opposite side is applied Set to "Connector Rear Direction". In addition, the direction orthogonal to both the "upper and lower direction of the connector" and the "front and rear of the connector" is referred to as "the left and right direction of the connector".

(about coaxial cable)

Further, as shown in FIG. 11, in particular, the thin-wire coaxial cable SC, which is a cable-like signal transmission medium, is coaxially connected to the outer side of the cable center conductor (signal line) SCa formed by a plurality of wires. The ground layer has a cable shielding conductor (shield wire) SCb, and a peripheral sheathing material is attached to the cable shielding conductor (shield wire) SCb. Further, in the terminal portion of the thin-wire coaxial cable SC, by peeling off the outer peripheral covering material, the cable shielding conductor (shield wire) SCb is exposed, and the cable shielding conductor (shield wire) SCb and cable are stripped by peeling off The dielectric, cable center conductor (signal line) SCa is exposed.

Further, the cable center conductor SCa disposed along the central axis of the thin-wire coaxial cable SC is connected to the inner conductor contact (signal conductive contact) 12 mounted on the insulating case 11, thereby constituting a signal circuit. Further, a shield case 13 is connected to the cable shield conductor SCb disposed on the outer peripheral side of the cable center conductor SCa, and the shield case 13 functions as a ground conductive contact for grounding, thereby constituting a ground circuit.

(About the insulating case)

As shown in Fig. 7 and Fig. 8, the insulating case 11 has a substantially circular plate-shaped insulating body portion 11a constituting a main fitting portion, that is, a connector body portion, and a lower portion of the insulating body portion 11a. The insulating insertion portion 11b on the inner side of the socket connector 20 that is inserted into the fitting body is integrally provided. In the insulating main body portion 11a, the outer casing accommodating chamber 11c on which the terminal portion of the thin coaxial cable SC is placed is formed, and the outer casing cover that can open and close the opening of the outer casing accommodating chamber 11c from above is formed. Part 11d.

The outer casing accommodating chamber 11c has a cable carrying portion 11c1 recessed in a substantially semicircular cross section at a front side portion of the insulating main body portion 11a, and a bearing thin wire coaxially placed on the inner peripheral wall surface of the cable carrying portion 11c1. The cable center conductor (signal line) SCa of the cable SC. Further, the main chamber portion of the outer casing accommodating chamber 11c is recessed in a central portion of the insulative housing portion 11a so as to be substantially rectangular in plan view from the cable carrying portion 11c1, and is fixed in the main chamber portion of the outer casing accommodating chamber 11c. There are internal conductor contacts (signal conductive contacts) 12. A cable center conductor SCa of the thin coaxial cable SC is placed on the upper side of the inner conductor contact 12.

Further, the outer casing cover portion 11d that can open and close the outer casing accommodating chamber 11c is formed of an elongated tongue-like member that is integrally coupled to the rear end edge portion of the insulating main body portion 11a, and is formed from the rear side edge of the insulating main body portion 11a. The front side edge portion of the front side toward the front side extends in a cantilever shape. Further, in the initial open state of FIGS. 8 and 9 which is erected upward with respect to the connecting portion of the back end side edge portion of the insulating main body portion 11a, the terminal portion of the thin wire coaxial cable SC is attached to the insulating case 11 (refer to FIG. 12) is bent downward together with the case lid portion 13b to be described later, and is pressed down to a substantially horizontal state disposed along the upper side of the thin-line coaxial cable SC, thereby becoming the one shown in FIGS. 1 to 3. Occlusion state.

At this time, the outer casing cover portion 11d has a shape other than the upper opening edge portion of the outer casing storage chamber 11c, and the outer casing cover portion 11d covers the cable from the upper side in the closed state of the outer casing cover portion 11d shown in Fig. 7 . The substantially entire surface of the upper opening portion of the outer casing accommodating chamber 11c of the wire carrying portion 11c1.

Further, an elastic pressing portion 11e composed of a strip-shaped plate-like member is provided at a substantially central portion of the outer casing cover portion 11d. The elastic pressing portion 11e is formed so as to extend along the cable center conductor (signal line) SCa, that is, in the closed state (see FIG. 7) of the casing cover portion 11d. The rear direction extends in a strip shape, and the slit groove formed on both side portions in the plate width direction (the left-right direction of the connector) of the elastic pressing portion 11e is separated from the outer casing cover portion 11d, and is elastically pressed. Both end portions of the extending direction of the portion 11e (the front-rear direction of the connector) are integrally coupled to the outer casing cover portion 11d, thereby providing elastic flexibility.

Further, the elastic pressing portion 11e has a shape that protrudes downward toward the lower side in the closed state of the casing cover portion 11d in the central portion in the extending direction, and the apex portion of the inverted mountain shape protruding toward the lower side is In the closed state (see FIG. 7) of the casing cover portion 11d, the arrangement relationship of the cable center conductors (signal lines) SCa of the thin coaxial cable SC is elastically contacted from the upper side.

That is, the case cover portion 11d is disposed above the inner conductor contact (signal conductive contact) 12, which will be described later, and the elastic pressing portion 11e provided in the case cover portion 11d is formed to protrude downward toward the inner conductor contact 12. The portion where the cable center conductor (signal line) SCa of the thin-wire coaxial cable SC contacts the inner conductor contact 12 is disposed such that the inverted shape portion of the elastic pressing portion 11e is disposed opposite to the upper side.

Further, in the closed state of the casing cover portion 11d (see FIG. 7), the abutment receiving portion 11f in which the inner surface of the casing cover portion 13b of the shield casing 13 to be described later is contacted is provided on the upper surface portion of the casing cover portion 11d. The case cover portion 13b of the shield case 13 will be described later in detail, but the abutment receiving portion 11f provided in the case cover portion 11d is formed to have a proper flat surface at the cable center conductor (signal line) SCa. The extending direction, that is, the "front and rear direction of the connector", is provided with an abutting receiving portion 11f on the side of the elastic pressing portion 11e, and is orthogonal to the direction in which the cable center conductor (signal line) SCa extends. Two abutting receiving portions 11f, 11f are provided on both side portions of the elastic pressing portion 11e. Further, the recess is formed in the outer casing of the casing cover portion 13b of the shield case 13 which will be described later. The portion 13b5 is press-contacted to the abutting receiving portion 11f from the upper side.

On the other hand, the shield case 13 as the ground contact member is attached to the insulative housing portion 11a so as to surround the inner conductor contact (signal conductive contact) 12 from the outer side. The insulating insertion portion 11b integrally protrudes downward from the insulative housing portion 11a as described above with respect to the insulative housing portion 11a of the insulative housing 11 constituting the main fitting portion, but the insulating insertion portion 11b is formed in a substantially hollow cylindrical shape. . The insulating insertion portion 11b is inserted from the lower end side inside the receptacle connector 20, which is the fitting target described above.

(About shielded housing)

Further, the outer surface of the insulating case 11 having the insulating main body portion 11a and the insulating insertion portion 11b is covered by the outer conductor case 13a constituting the main fitting portion of the shield case 13 made of a thin metal member. The other-side conductor case 13a is mainly formed in a substantially hollow cylindrical shape in which the insulating body portion 11a of the insulating case 11 is annularly covered from the outer side in the radial direction. Further, the lower side portion of the outer conductor casing 13a is a casing insertion portion 13a1 that annularly covers the insulating insertion portion 11b from the outer side in the radial direction, and a cylindrical opening on the upper end side of the outer conductor casing 13a. A case cover portion 13b that covers the upper surface side of the above-described insulative housing portion 11a is partially openably and closably connected.

At this time, the shield case 13 in the initial state before the end portion of the thin-wire coaxial cable SC is connected and fixed, in particular, as shown in FIGS. 9 and 10, the case cover portion 13b with respect to the outer conductor case 13a It is open to the upper side. In other words, the case cover portion 13b in the initial state is disposed on the side edge portion of the outer conductor case 13a after the connection member 13b1 formed of the thin wide plate-like member is erected substantially above the plume. Further, as described above, the outer casing cover portion 11d formed of the tongue-like member standing upward from the insulating main body portion 11a of the insulating casing 11 is disposed in the casing along the inner surface of the cover of the casing cover portion 13b. Inside the cover of the body cover portion 13b The surface, that is, the surface on the inner side when the case cover portion 13b is closed. Further, the installation position and the number of installations of the above-described connection member 13b1 can be arbitrarily selected.

Further, in the open state (initial state) of the shield case 13, after the terminal portion of the thin-wire coaxial cable SC is placed and mounted by the cable carrying portion 11c1 of the insulating case 11, (refer to FIG. 12), The member 13b1 is bent at a substantially right angle toward the lower side together with the case cover portion 11d, and the case cover portion 13b of the shield case 13 is pressed down to a substantially horizontal state, whereby the insulative housing portion 11a of the insulating case 11 is entirely covered by the case cover portion. The 13b is covered from the upper side, and the shield case is in a closed state. On the other hand, the casing cover portion 11d is also pressed down to a substantially horizontal state together with the casing cover portion 13b, but the casing accommodating chamber 11c of the insulating body portion 11a is closed from the upper side by the casing cover portion 11d.

At this time, the case cover portion 13b covers the cylindrical opening portion on the upper end side of the outer casing 13a when it is overturned to a substantially horizontal state and is closed, but the case cover portion 13b which is pressed down to a substantially horizontal state The front side portion is integrally provided with a front cover portion 13b2 which covers the thin wire coaxial cable SC from the upper side, in particular, the cable dielectric and the cable shielding conductor (shield wire) SCb. The front cover portion 13b2 covers the cable protection arm 13b6 projecting from the outer conductor case 13a toward the front side from the outer side together with the thin wire coaxial cable SC.

At this time, the cable protection arm 13b6 is provided from the front side of the outer conductor case 13a so as to be held on both sides in the left-right direction from the bottom of the cable shielding conductor (shield wire) SCb of the thin-wire coaxial cable SC. The end edge portion protrudes toward the front side along the terminal portion of the thin-line coaxial cable SC.

Further, as described above, the first fixed holding plate 13b3 and the second solid portion which are formed by a pair of tongue-like members are provided on both side edges of the front cover portion 13b2 from the front side of the casing cover portion 13b. The fixed holding plate 13b4 is formed in a flange plate shape. The first fixed holding plate 13b3 is bent so as to cover the thin wire coaxial cable SC and the cable protection arm 13b6 from the outer side and to be caulked and fixed.

That is, the flange plates on both sides of the pair of first fixed holding plates 13b3, 13b3 are arranged to be located outside the cable protection arms 13b6 when the casing cover portion 13b is pressed down to a substantially horizontal state. In this state, the gap is filled, and the outer wall surfaces of the both sides of the cable protection arm 13b6 are bent to the inner side of the connector, thereby fixing the housing cover portion 13b to the outer conductor housing 13a, and the thin wire coaxial cable The cable shield conductor (shield wire) SCb of the line SC is fixed to the case cover portion 13b. Further, at the same time, the cable shielding conductor (shield wire) SCb is electrically connected to the shield case 13, thereby constituting a ground circuit.

Further, the second fixed holding plate 13b4 is formed adjacent to the front side of the first fixed holding plate 13b3, and is formed of a small flange plate. The second fixed holding plate 13b4 is bent so as to cover the outer peripheral covering material of the thin-wire coaxial cable SC from the outer side and to be caulked and fixed.

In other words, the flange plates on both sides of the second fixed holding plate 13b4 are disposed so as to be placed on the outer circumference of the thin coaxial cable SC when the case cover portion 13b is pressed down to a substantially horizontal state, thereby filling the state. Gap, bent to the inner side of the connector. Thereby, the casing cover portion 13b is fixed to the outer peripheral covering member of the thin wire coaxial cable SC.

Here, the case pressing portion 13b5 of the case cover portion 13b is formed at a position corresponding to the contact receiving portion 11f provided in the case cover portion 11d of the insulative housing 11, and is recessed in a substantially rectangular shape in plan view. The position where the abutting receiving portion 11f faces from the upper side.

More specifically, the elastic pressing portion 11e provided in the outer casing cover portion 11d is disposed on the side of the "receiving device in the left-right direction", and the pair of the abutting receiving portions 11f, 11f are opposed to each other, and One abutment on the front side of the connector with respect to the elastic pressing portion 11e The flat surface of the outer casing pressing portion 13b5 that protrudes toward the lower side of the outer surface of the receiving portion 11f is provided in the insulating casing when the casing cover portion 13b is pressed down to a substantially horizontal state and is closed. The abutting receiving portion 11f of the outer casing cover portion 11d of 11 is pressed downward from the upper side. Thereby, the elastic pressing portion 11e of the outer casing cover portion 11d is surely crimped to the cable center conductor (signal line) SCa of the thin coaxial cable SC.

On the other hand, as described above, the case insertion portion 13a1 constituting the lower side portion of the outer conductor case 13a of the shield case 13 is externally fitted to the outer side portion of the socket connector 20 in the radial direction, and is inserted. The insulating insertion portions 11b of the insulating case 11 on the inner side in the radial direction of the receptacle connector 20 together constitute a connector connecting portion. More specifically, the lower end portion of the insertion side of the housing insertion portion 13a1 is formed with a coupling engagement portion which is formed by an annular groove which protrudes toward the inner side in the radial direction, and is overwhelmed in the housing cover portion 13b as described above. After the substantially horizontal state, the connection engagement portion of the case insertion portion 13a1 is elastically fitted to the connection locking portion of the socket connector 20 which is a fitting object.

(about signal conductive contacts)

Further, the inner conductor contact (signal conductive contact) 12 used in the present embodiment is attached to the insulative housing portion 11a of the insulative housing 11 by press fitting or insert molding, but has a thin coaxial cable SC for connection. The cable mounting portion 12a of the cable center conductor (signal line) SCa and the elastic spring portion 12b extending downward from the cable mounting portion 12a are provided to the socket connector to be fitted The signal conductive contact 22 (see FIGS. 14 to 17) of 20 is elastically contacted.

The cable mounting portion 12a of the inner conductor contact (signal conductive contact) 12 is formed of a plate-like member extending in a flat surface, and is placed on the upper surface of the insulating body portion 11a of the insulating housing 11. Fixed down. On the surface of the cable mounting portion 12a, placed from above The cable center conductor SCa of the thin-wire coaxial cable SC is placed on the cable carrying portion 11c1 of the insulative housing 11 when the terminal portion of the thin-wire coaxial cable SC is placed, and the cable center conductor SCa of the thin-wire coaxial cable SC is The upper side is placed on the surface of the cable mounting portion 12a.

As described above, the terminal portion of the thin-wire coaxial cable SC is placed on the cable carrying portion 11c1 of the insulative housing 11, and the cable center conductor SCa is placed on the surface of the inner conductor contact (signal conductive contact) 12, and the shield case is The case cover portion 13b of the case 13 and the case cover portion 11d of the insulative housing 11 are pushed down to a substantially horizontal state. However, at this time, the elastic pressing portion 11e of the case cover portion 11d is particularly shown in FIGS. 4 to 6. The cable center conductor (signal line) SCa of the thin coaxial cable SC is pressed from the upper side. The cable center conductor (signal line) SCa of the lower side of the elastic pressing portion 11e of the outer casing cover portion 11d is pressed against the cable mounting portion 12a of the inner conductor contact (signal conductive contact) 12, Good electrical connection.

Further, a connection monitoring hole having a circular hole shape is formed in a substantially central portion of the cable mounting portion 12a of the conductive contact 12, but a through hole of the signal conductive contact 22 of the socket connector 20 to be described later is inserted into the hole. The connection monitoring hole is formed substantially coaxially in the insulating insertion portion 11b of the insulating case 11. The through hole for inserting the contact of the receptacle connector 20 also functions as a connection monitoring hole, and the connection of the cable center conductor (signal line) SCa of the thin coaxial cable SC can be visually viewed from the lower side through the connection monitoring hole. status.

Further, as described above, the cable mounting portion 12a of the inner conductor contact (signal conductive contact) 12 is formed of a plate-like member extending in the front-rear direction of the connector, but a pair of elastic spring portions 12b, 12b are from the cable Both side edge portions of the mounting portion 12a in the board width direction (the connector left-right direction) are integrally extended at a predetermined interval toward the lower side, and are provided in a pin-shaped signal conductive contact 22 of the socket connector 20 which is a fitting object to be described later. The crimping state is inserted into the two elastic spring portions formed into a split shape 12b, 12b are part of each other and are electrically connected.

On the other hand, as shown in FIGS. 14 to 17, the socket connector 20, which is a fitting connector, has a base-like frame that is placed on a printed wiring board (not shown) and has a rectangular shape in plan view. An insulative housing 21 is mounted with a signal conducting contact 22 for signal transmission at a central portion of the insulative housing 21, and is mounted annularly around the signal conducting contact 22 in a radial direction. Grounding contact 23 for grounding.

(about the composition of the signal conductive contact)

The signal conductive contact 22 is formed of a predetermined thin metal member, but the fitting contact portion having a hollow pin shape is disposed at a position substantially equal to the center of the insulating case 21, and the connecting leg portion 22a is embedded therefrom. The lower end portion of the combined contact portion extends toward the outer side. A fitting contact portion disposed at a substantially central portion of the insulative housing 21, the inner conductor contact member (signal conductive contact member) 12 embedded in the plug connector 10 is disposed in a branch-like elastic spring portion 12b, 12b between each other Thereby making electrical connections. The fitting contact portion of the signal conductive contact 22 provided in the receptacle connector 20 is disposed such that the elastic pressing portion 11e of the outer casing cover portion 11d of the plug connector 10 is connected to the inner conductor provided to the plug connector 10 The portions of the elastic spring portions 12b, 12b of the contact member 12 oppose each other at a position directly above.

Further, as described above, the connecting leg portion 22a extending from the fitting contact portion of the signal conductive contact member 22 is formed of a strip-shaped member extending along the bottom surface of the insulating case 21, from one end edge of the insulating case 21 toward the outer side protruding. The outer protruding portion of the connecting leg portion 22a or the entire connecting leg portion 22a is soldered to the signal conducting path for signal transmission formed on a printed wiring board (not shown).

(About the composition of the ground contact)

On the other hand, the ground contact member 23 is also formed of a bent member of, for example, a predetermined thin metal plate, and has a grounded body portion formed into a substantially cylindrical hollow shape, and a plurality of (three) connecting leg portions 23a face the radius The outer side of the direction is integrally extended to be disposed at a lower edge of the outer peripheral portion of the annular grounded body portion. These two connecting leg portions 23a are respectively soldered to a ground conductive path for ground connection formed on a printed wiring board (not shown).

According to the present embodiment having such a configuration, when the casing cover portion 13b of the shield case 13 is pressed down to a substantially horizontal state and is closed, the casing cover portion 11d of the insulating casing 11 constituting the dielectric and the cable of the thin coaxial cable SC are attached. The line center conductor (signal line) SCa is disposed adjacent to the upper side, and the dielectric constant near the cable center conductor (signal line) SCa is lowered, and the static capacitance is reduced. Therefore, by adjusting the thickness of the outer casing cover portion 11d of the insulating casing 11, the characteristic impedance with respect to the thin-wire coaxial cable SC can be appropriately adjusted, and the matching ratio (VSWR) matching of the characteristic impedance of the transmission signal can be easily and appropriately obtained. Thereby, the transmission of the high frequency signal is performed well.

At the same time, the cable center conductor (signal line) SCa of the thin-wire coaxial cable SC is directly pressed by the elastic pressing portion 11e provided in the outer casing cover portion 11d of the insulating casing 11, thereby being in the signal-conducting contact member 12 Since the cable mounting portions 12a are in a holding state, the cable center conductor (signal line) SCa of the thin-line coaxial cable SC is held by the plastic deformation force at the time of bending as compared with the conventional conductor holding arm. As the pressing force becomes higher, the entire electrical connector is pressed downward, and the height can be lowered. Further, by the elastic pressing action of the elastic pressing portion 11e of the outer casing cover portion 11d of the cable center conductor (signal line) SCa of the thin coaxial cable SC, the pressing action from the outer casing cover portion 11d can be stably maintained for a long period of time.

Further, in the present embodiment, the elastic pressing portion 11e is formed in a convex shape toward the inner conductor contact (signal conductive contact) 12, and thus the elastic pressing portion of the outer casing cover portion 11d is formed. 11e is surely abutted against the cable center conductor (signal line) SCa of the thin coaxial cable SC.

Further, in the present embodiment, the case pressing portion 13b5 of the case cover portion 13b of the shield case 13 in the closed state is also in a pressure-contact state with respect to the contact receiving portion 11f provided in the case cover portion 11d. Good height reduction.

Further, the elastic pressing portion 11e of the outer casing cover portion 11d in the present embodiment is disposed as an inner conductor contact member (signal conductive contact member) 12 which is in contact with the cable center conductor (signal line) SCa of the thin coaxial cable SC. The elastic spring portions 12b, 12b are opposed to the position directly above the connection portion of the fitting connection portion of the signal-conducting contact member 22 of the socket connector 20 of the fitting connector, and thus are subjected to elastic pressing from the casing cover portion 11d. The cable center conductor (signal line) SCa of the thin-wire coaxial cable SC of the pressing portion 11e is pressed toward the connection portion between the signal conductive contacts 12, 22. As a result, it is possible to shorten the signal transmission circuit, improve electrical characteristics, and improve the signal transmission characteristics of the electrical connector.

The present invention has been described in detail with reference to the embodiments of the present invention. However, the present invention is not limited thereto, and various modifications may be made without departing from the spirit and scope of the invention.

For example, in the above embodiment, the present invention is applied to a vertical fitting type electrical connector, but the same can be applied to a horizontal fitting type electrical connector.

Further, the present invention is not limited to the single-core thin-wire coaxial cable connector of the above embodiment, and can be similarly applied to a multi-pole coaxial cable connector or a hybrid plurality of coaxial cables and insulation. Electrical connectors of the type of cable, etc.

As described above, the present embodiment can be widely applied to various types of electrical connectors used in various electric devices.

11c‧‧‧Shell containment room

11c1‧‧‧Cable bearing

11d‧‧‧ casing cover

11e‧‧‧Elastic press

12a‧‧‧ Cable Mounting Department

13‧‧‧Shield housing (earth contact)

13a‧‧‧External conductor housing

13a1‧‧‧Sheet insertion

13b‧‧‧Shell cover

13b1‧‧‧Connected components

13b2‧‧‧ front cover

13b3‧‧‧1st fixed retaining plate

13b4‧‧‧2nd fixed retaining plate

13b5‧‧‧Shell press

13b6‧‧‧ cable protection arm

Claims (4)

An electrical connector having an insulative housing for connecting a terminal portion of a cable-like signal transmission medium, wherein the insulative housing is mounted with a signal-conducting contact member for connecting a center conductor of the cable-like signal transmission medium, characterized in that The insulative housing is openably and closably provided with a housing cover portion covering the signal conductive contact member, and an elastic pressing portion is disposed on the housing cover portion, the elastic pressing portion elastically contacting the center conductor of the coaxial cable, the coaxial The center conductor of the cable is pressed against the signal conductive contact. A conductive casing having a hollow cylindrical outer conductor casing that annularly covers the outer surface of the insulating casing is attached to the insulating casing, and the casing cover portion that overlaps the outer casing cover from the outside is openably and closably The outer conductor housing of the conductive housing, when the housing cover portion is closed, the inner surface of the housing cover portion covers the cylindrical opening portion of the outer conductor housing and is crimped to the elastic pressing portion; An abutting receiving portion that contacts the inner surface of the casing cover portion is provided adjacent to the elastic pressing portion to the outer casing cover portion. The electrical connector of claim 1, wherein the elastic pressing portion is formed to have a convex shape toward the signal conductive contact. The electrical connector of claim 1, wherein the abutting receiving portion is disposed adjacent to the elastic pressing portion in a direction in which the center conductor of the coaxial cable extends and an orthogonal direction thereof. The electrical connector of claim 1, wherein the elastic pressing portion disposed on the cover portion of the housing is configured to be in contact with the center conductor of the coaxial cable and the signal-contacting member is disposed The connecting portion of the signal conductive contact of the electrical connector is opposite.