JP6390862B2 - L-type coaxial connector - Google Patents

Description

  The present invention relates to an L-type coaxial connector that connects a coaxial cable mainly used for transmitting a high-frequency signal and an electronic device, and particularly relates to an L-type coaxial connector excellent in waterproofness and airtightness.

  Conventionally, a coaxial connector for connecting a coaxial cable used for transmission of a high-frequency signal and an electronic device has a connection portion connected to a counterpart connector arranged in a direction crossing the axial direction of the coaxial cable. L-type coaxial connectors are widely used.

  The L-shaped coaxial connector includes a shell having a cylindrical shell body, an insulator accommodated in the shell body, and a center contact that is held by the insulator and is coaxially disposed inside the shell body. On the other hand, the coaxial cable is held in a direction crossing the center contact.

  The shell body includes a connection work space formed on the rear side of the insulator, and a connection work hole that is open to the connection work space at the rear end of the shell body, and the connection work is made through the connection work hole. The center contact exposed in the work space is connected to the center conductor of the coaxial cable.

Japanese Utility Model Publication No. 4-35378

  In recent years, this type of coaxial connector has been required to have excellent airtightness and waterproofness due to diversification of electronic devices. However, in the conventional technology as described above, the connection portion is connected to the rear portion of the connection portion. Since the space is formed, it is difficult to ensure airtightness and waterproofness.

  On the other hand, in the conventional technology as described above, since it is a structure that accommodates the insulator that holds the center contact in the connection portion of the outer shell, a stopper structure that resists the pushing force at the time of connection with the mating connector is necessary. Accordingly, an increase in the number of parts and a complicated structure are required, which increases the cost.

  Furthermore, since the conventional center contact is formed by cutting or the like, there is a problem that it is expensive.

  Therefore, in view of such a conventional problem, the present invention has been made for the purpose of providing an L-shaped coaxial connector that is excellent in airtightness and waterproofness and is inexpensive.

The feature of the invention described in claim 1 for solving the conventional problems as described above is that a shell having a cylindrical shell body, an insulator housed in the shell body, and held by the insulator A center contact coaxially disposed inside the shell body, and an L-shaped coaxial connector held in a direction in which a coaxial cable intersects the shell body and the center contact, the shell body including the insulator A connection work space formed on the rear side of the shell body, and a connection work hole opened in communication with the connection work space at the rear end of the shell body, and coaxial with the central contact exposed in the connection work space An L-shaped coaxial connector connected to a central conductor of a cable, comprising a sealing resin filled in the connection work space, The center contact includes a center contact body in which a conductive plate material has a cylindrical shape, and a resin leakage prevention plate that is integrally supported by a rear end side opening edge of the center contact body and closes the rear end side opening of the center contact body. And a cable positioning portion into which the central conductor of the coaxial cable is inserted at the rear end side, and the central conductor is held in the cable positioning portion so as not to be lifted with respect to the resin leakage prevention plate. The L-shaped coaxial connector.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the cable positioning portion includes:
It is provided with a floating prevention portion in which a positioning hole is formed, and the resin leakage prevention plate is formed by a portion cut and raised from the positioning hole.

Features of the invention described in claim 3, in addition to the configuration of claim 1 or 2, comprising a cable connection portion communicating with the connecting work space on the sides of the shell body, the space for connection work of the cable connecting portion The side opening edge is exposed in the connection work space.

According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects , a gap between the resin leakage prevention plate and the central contact body is sealed by the preliminary solder of the central conductor. There is to be.

  As described above, the L-shaped coaxial connector according to the present invention includes a shell having a cylindrical shell body, an insulator housed in the shell body, and coaxially disposed inside the shell body while being held by the insulator. An L-shaped coaxial connector that is held in a direction in which a coaxial cable intersects the shell body and the center contact, and is formed on the shell body on the rear side of the insulator. A connection work space; and a connection work hole that is open to communicate with the connection work space at a rear end of the shell body, and the center contact exposed to the connection work space is connected to a center conductor of the coaxial cable. In the L-shaped coaxial connector, the center contact is provided with a sealing resin filled in the connection work space. A central contact body in which the conductive plate material has a cylindrical shape; and a resin leakage prevention plate that is integrally supported by a rear end side opening edge of the central contact body and closes the rear end side opening of the central contact body. As a result, high waterproofness and airtightness can be ensured, and even if an inexpensive press-processed product is used for the center contact, leakage of the sealing resin to the connection part side is prevented, thereby preventing poor contact. Can do.

  In the present invention, the center contact is integrally provided with a cable positioning portion into which the center conductor of the coaxial cable is inserted on the rear end side, and the center conductor is lifted with respect to the resin leakage prevention plate in the cable positioning portion. Since the holding is impossible, the connection work between the coaxial cable and the center contact can be performed efficiently.

  Further, in the present invention, the cable positioning portion includes a lifting prevention portion in which a positioning hole is formed, and the resin leakage prevention plate is formed by a portion cut and raised from the positioning hole, thereby preventing resin leakage. The prevention plate and the positioning hole can be formed in a lump, and the component cost can be reduced.

Furthermore, in the present invention, a cable connection portion communicating with the connection work space is provided on a side surface of the shell body, and an opening edge on the connection work space side of the cable connection portion is exposed in the connection work space. As a result, the sealing resin goes around the periphery of the end portion of the coaxial cable, and the gap between the coaxial cable and the shell can be filled to improve the sealing performance.

In the present invention, the gap between the resin leakage prevention plate and the center contact body is sealed by the preliminary solder of the center conductor, so that the solder has a gap between the resin leakage prevention plate and the inner periphery of the center contact body. To ensure higher waterproofness and airtightness .

It is a longitudinal section showing an example of an L type coaxial connector concerning the present invention. It is a bottom view same as the above. (A) is a front view showing the center contact in FIG. 1, (b) is the same plan view, (c) is a cross-sectional view along the AA line. It is an expanded view of the center contact same as the above. (A)-(c) is sectional drawing which shows the state of each process of an assembly of the L type coaxial connector same as the above. It is a partial enlarged plan view which shows the outline of the contact state of a center contact and the center conductor of a coaxial cable.

  Next, an embodiment of the L-shaped coaxial connector A according to the present invention will be described based on the embodiment shown in FIGS. In the figure, symbol A is an L-shaped coaxial connector, and symbol 1 is a coaxial cable.

  Further, in this embodiment, the description will be given with reference to the connecting axis direction with respect to the mating connector, with the mating connector side in the connecting axis direction as the front.

  The L-shaped coaxial connector A includes a shell 2 having a cylindrical shell body 21, an insulator 3 accommodated in the shell body 21, and a center contact that is held by the insulator 3 and coaxially disposed inside the shell body 21. 4, the coaxial cable 1 is connected to the shell body 21 from a direction intersecting the axial direction of the center contact 4, and is held in that state.

  The L-shaped coaxial connector A includes an outer cover 5 made of an insulating resin on the outside of the shell 2, and the shell 2 and the tip of the coaxial cable 1 are held in the outer cover 5. The gap between them can be sealed with a sealing member 6 such as an O-ring.

  The shell 2 includes a cylindrical shell main body 21 having both ends opened, and a concentric cylindrical contact shell 22 disposed inside the shell main body 21, and a connection work hole 71 opened at the rear end of the shell main body 21. Further, the contact shell 22 is assembled in the shell main body 21 in a state of being electrically connected to each other.

  The shell body 21 is formed in a cylindrical shape by a conductive metal material, and is integrally projected in a state in which the cylindrical cable connection portion 23 communicates with the side surface portion on the rear end side in a crossing direction. The end portion of the coaxial cable 1 from which the outer sheath 14 and the outer conductor 13 have been peeled is inserted, and the end face of the derivative 12 is exposed in a connection work space 7 to be described later.

  In addition, an annular cable connection sleeve 24 is fitted to the outside of the cable connection portion 23, and the outer conductor 13 of the coaxial cable 11 is sandwiched between the cable connection portion 23 and the cable connection sleeve 24. 2 and the external conductor 13 are connected in a conductive state.

  The contact shell 22 is integrally formed of a conductive metal material having elasticity, and is formed in a cylindrical shape having both ends opened in the axial direction.

  The contact shell 22 includes a plurality of slits 221 and 221 that are axially spaced apart in the circumferential direction, and the cylindrical counterpart connector connection side is divided in the circumferential direction by the slits 221 and 221. Shell elastic contact pieces 222, 222... Are formed.

  Each of the shell elastic contact pieces 222, 222... Is integrally formed with a contact portion 223 that bulges inward. When the counterpart connector is connected, the contact portion 223 is the outer peripheral surface of the shell 2 of the counterpart connector. To come into contact.

  The contact shell 22 is inserted into the shell main body 21 from the connection work hole 71 at the rear end, and is fixed in a state of being connected to each other and being unable to be pulled out to the mating connector side. 222 ... are held in a state of being deformable in the radial direction.

  The insulator 3 is formed in a multi-stage columnar shape in which a columnar insulator main body 31 and a columnar contact housing protrusion 32 protruding from the center of one end surface of the insulator main body 31 are continuous in the axial direction.

  Further, the insulator 3 is formed with a contact accommodating hole 33 penetrating through the axial center of the contact accommodating protrusion 32 and the insulator main body 31, and the center contact 4 is inserted and accommodated in the contact accommodating hole 33. The main body 21, the contact shell 22 and the center contact 4 are arranged concentrically, and the insulator 3 made of an insulator is interposed between the contact shell 22 and the center contact 4.

  The insulator main body 31 is formed in a columnar shape integrally having a flange portion 311, and is inserted into the contact shell 22 by inserting the insulator 3 from the connection work hole 71 on the rear end side of the shell main body 21, The flange portion 311 is engaged with a step portion 211 formed on the inner peripheral portion of the shell main body 21, and is accommodated in a state in which it cannot be pulled out to the mating connector side.

  Then, when the insulator 3 is fixed in the shell main body 21 in the shell main body 21, a connection work space 7 is formed on the rear end side thereof. In the connection work space 7, a cable connection is made to the inner peripheral surface portion. The connection work space side opening edge 231 of the portion 23 is exposed, and the end of the center contact 4 held by the insulator 3 is exposed.

  As shown in FIG. 3, the center contact 4 is integrally formed by punching a conductive metal plate material as shown in the development view shown in FIG. 4 and pressing it so that the plate material has a cylindrical shape. A main body 41 and a resin leakage prevention plate 42 that are integrally supported by the edge of the rear end side opening 411 of the center contact main body 41 and block the rear end side opening 411 of the center contact main body 41 are provided.

  Further, the center contact body 41 is integrally provided with a cable positioning portion 43 in which a positioning hole 431 into which the center conductor 11 of the coaxial cable 1 is inserted is formed on the rear end side, and the resin leakage prevention plate 42 is formed from the positioning hole 431. The positioning hole 431 is formed by the cut and raised hole.

  The cable positioning portion 43 is U-shaped with a lifting prevention portion 432 that is integrally continuous with the rear end side of the plate member constituting the center contact body 41 and side guide pieces 433 and 433 that are bent from both sides of the lifting prevention portion 432. The U-shaped opening side is directed and fixed to the cable connection portion 23 side while being held by the insulator 3.

  And the front-end | tip of the center conductor 11 of the coaxial cable 1 is guided to the both-side surface guide pieces 433, 433, and the center conductor 11 can be easily positioned by being inserted into the positioning hole 431, and the coaxial cable 1 Lifting with respect to the center contact 4 (resin leakage prevention plate 42) is prevented.

  The center contact main body 41 is formed in a cylindrical shape by rounding a rectangular plate material by press working, and a central connection portion 44 having a truncated cone shape is integrally formed at a tip portion thereof.

  Further, on the outer peripheral surface portion of the center contact body 41, fixing convex pieces 45, 45 protruding outward are formed in a symmetrical arrangement, and the fixing convex pieces 45, 45 engage with the inner side surface of the contact accommodating hole 33. Thus, the center contact 4 is fixed to the insulator 3.

  The center connection portion 44 includes a plurality of slits 441 and 441 that are axially spaced apart in the circumferential direction, and the truncated cone shape is divided in the circumferential direction by the slits 441 and 441, and a pair of elastic contact piece portions 442 and 442 are formed, and the center contact of the mating connector is inserted and sandwiched between the elastic contact pieces 442 and 442.

  The resin leakage prevention plate 42 is formed in a circular shape substantially the same as the inner diameter of the center contact body 41, and is supported by a bent support piece 421 as shown in a development view shown in FIG. The rear end side opening 411 is fitted in the rear end side opening 411 of the center contact main body 41 to close the rear end side opening 411.

  The resin leakage prevention plate 42 also serves as a connection terminal for connecting the central conductor 11 of the coaxial cable 1 and the central contact 4, and the central conductor 11 is connected thereto by soldering.

  In that case, by preliminarily soldering the front end portion of the center conductor 11, the solder flows between the inner peripheral surface of the center contact body 41 and the resin leakage prevention plate 42, thereby the rear end of the center contact 4. The side opening 411 is more strictly sealed.

  The connection work space 7 is formed in a concave hole shape with the rear end surface of the insulator 3 surrounded by the inner peripheral surface of the shell body 21 and the insulator 3 as a bottom, and is filled with a sealing resin 8.

  The sealing resin 8 is a resin that has high fluidity before curing, excellent filling properties, and exhibits high airtightness after curing, for example, an epoxy resin.

  Next, a method for assembling the L-shaped coaxial connector A will be described with reference to FIGS.

  First, as shown in FIG. 5A, the contact shell 22, the insulator 3, and the center contact 4 are inserted into the shell body 21 through the connection work hole 71, and the contact shell 22, the insulator 3, and the center are inserted into the shell body 21. The contacts 4 are accommodated in a coaxial arrangement with each other so that they cannot be pulled out toward the mating connector.

  At that time, a part of the insulator 3 holding the center contact 4 does not overlap with the opening of the cable connecting portion 23, and the U-shaped opening side of the cable positioning portion 43 of the center contact 4 faces the cable connecting portion 23 side. Positioned to face.

  Next, as shown in FIG. 5 (b), the end of the coaxial cable 1 with the outer covering 14 and the outer conductor 13 peeled off is connected to the position where the end face of the derivative 12 is inserted into the connection work space 7. It is inserted into the shell body 21 through the portion 23, that is, into the connection work space 7.

  At that time, as shown in FIG. 6, the center conductor 11 is guided by the side guide pieces 433 and 433 of the cable positioning portion 43 at both sides, and the leading end is inserted into the positioning hole 431, and the resin leakage prevention plate of the center contact 4. 42 is in a state where it cannot be lifted.

  Further, the outer conductor 13 of the coaxial cable 1 is disposed outside the cable connection portion 23, and the connection sleeve 24 is fitted therein, and the outer conductor 13 is sandwiched between the outer periphery of the cable connection portion 23 and the connection sleeve 24. By doing so, the shell 2 and the outer conductor 13 of the coaxial cable 1 are conducted, and the coaxial cable 1 is temporarily fixed.

  In this state, by soldering the center conductor 11 to the resin leakage prevention plate 42 of the center contact 4 through the connection work hole 71, the center contact 4 and the center conductor 11 of the coaxial cable 1 are fixed in a conductive state. The

  At that time, the center conductor 11 is held in a state in which it cannot be lifted with respect to the center contact 4, so that it is possible to efficiently perform the connection work by solder.

  Further, by preliminarily soldering the central conductor 11, the preliminary solder flows between the inner periphery of the central contact body 41 and the resin leakage prevention plate 42, and the resin leakage prevention plate 42 and the center contact body 41 are in contact with each other. A gap with the inner periphery is sealed.

  Then, as shown in FIG. 5C, the sealing resin 8 is filled into the connection work space 7 from the connection work hole 71 and hardened, whereby the center conductor 11 and the shell body are sealed by the sealing resin 8. And the gap between the shell 12 and the derivative 12 of the coaxial cable 11 are sealed.

  At that time, since the opening edge 231 of the cable connection portion 23 is exposed in the connection work space 7, the sealing resin 8 filled in the connection work space 7 is in the connection work space 7 of the coaxial cable 1. Since it can wrap around the outer periphery of the inserted part and can cover the whole part inserted in the connection work space 7 of the coaxial cable 1, the gap between the coaxial cable 1 and the shell main body 21 can be covered. Can be suitably sealed.

  The sealing resin 8 has a certain fluidity until it is cured, but the center contact 4 is provided with a resin leakage prevention plate 42 that closes the rear end side opening 411 of the center contact body 41, so that the center contact is provided. It is possible to prevent the resin from leaking out to the 4 connection portion side, and the resin does not adversely affect the contact performance.

  Further, when the sealing resin 8 is cured, the sealing resin 8 is fixed to the shell main body 21, and this sealing resin 8 functions as a stopper, toward the rear end side of the contact shell 22, the insulator 3, and the center contact 4. Is prevented from coming out, and resistance to pushing force when connecting to the mating connector is secured.

  Then, as shown in FIG. 1, a closing lid 72 is fitted into the connection work hole 71 to close as necessary, and the outside of the resin 2 is covered so as to cover the outside of the shell 2 and the front end of the coaxial cable 1. The cover 5 is formed.

  The L-shaped coaxial connector A configured as described above has the connection work space 7 formed at the rear end portion of the shell main body 21 so that the connection work between the center contact 4 and the coaxial cable 1 can be performed easily and efficiently. In addition, by filling the connecting work space 7 with the sealing resin 8, a structure having high waterproofness and airtightness can be obtained.

  On the other hand, the L-shaped coaxial connector A includes a resin leakage prevention plate 42 that closes the rear end side opening 411 of the center contact body 41 to prevent the sealing resin 8 from leaking to the connection portion side with the counterpart connector. Therefore, the center contact 4 of the press-processed product can be introduced, and the manufacturing cost can be reduced.

  In addition, since the L-shaped coaxial connector A includes the sealing resin 8 filled on the rear side of the insulator 3 in the shell main body 21, the contact shell 22 and the insulator 3 can be provided without any additional stopper parts and structures. When the center contact 4 is connected to the mating connector, each part is supported by the sealing resin 8 and can resist the load in the pushing direction received from the mating connector.

  In the above-described embodiment, the example in which the closing lid that fits into the connection work hole 71 and closes the hole has been described, but the closing lid is not necessarily provided.

A L-type coaxial connector 1 coaxial cable 11 central conductor 12 derivative 13 outer conductor 14 outer sheath 2 shell 21 shell main body 22 contact shell 23 cable connection portion 24 cable connection sleeve 3 insulator 31 insulator main body portion 32 contact accommodating protrusion 33 contact accommodation Hole 4 Center contact 41 Center contact body 411 Opening 42 Resin leakage prevention plate 43 Cable positioning portion 431 Positioning hole 432 Lifting prevention portion 433 Side guide piece 44 Center connection portion 45 Fixing convex piece 5 External cover 6 Sealing member 7 For connection work Space 71 Hole for connection work 8 Sealing resin

Claims (4)

A shell having a cylindrical shell body, an insulator housed in the shell body, and a center contact held by the insulator and coaxially arranged inside the shell body, the shell body and the center contact On the other hand, an L-shaped coaxial connector that is held in the direction in which the coaxial cables intersect,
The shell body includes a connection work space formed on the rear side of the insulator, and a connection work hole that is open to the connection work space at a rear end of the shell body, and the connection work space. In the L-shaped coaxial connector, the central contact exposed to the central conductor and the central conductor of the coaxial cable are connected.
With a sealing resin filled in the connection work space,
The center contact includes a center contact body in which a conductive plate is formed in a cylindrical shape, and a resin leakage prevention plate that is integrally supported by a rear end side opening edge of the center contact body and closes the rear end side opening of the center contact body. And a cable positioning portion into which the central conductor of the coaxial cable is inserted at the rear end side, and the central conductor is held in the cable positioning portion so as not to be lifted with respect to the resin leakage prevention plate. L-type coaxial connector, characterized in that the. 2. The L-shaped coaxial connector according to claim 1 , wherein the cable positioning portion includes a lifting prevention portion in which a positioning hole is formed, and the resin leakage prevention plate is formed by a portion cut and raised from the positioning hole. It includes a cable connecting portion that communicates with the connecting work space on the sides of the shell body, according to claim connection work space side opening edge of the cable connection portion is exposed to the connection working space 1 or 2 L type coaxial connector as described in 2. The L-shaped coaxial connector according to any one of claims 1 to 3 , wherein a gap between the resin leakage prevention plate and the center contact body is sealed by a preliminary solder of the center conductor.

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