JP2014232595A - Coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial connector capable of improving a high frequency property and relatively positioning and assembling a shield case, an insulation housing and a cylindrical shell in simple configuration.SOLUTION: An engaging recess which is recessed from an outer peripheral surface of an insulator is radially opened on an outer peripheral surface of an insulation housing 5 via a communication hole of a cylindrical shell and a communicating recess of the insulation housing. A cut-and-raised piece 7 is cut and raised from a portion covering a communication recess 54 in a shield case 6. A distal end of the cut-and-raised piece 7 is engaged into the engaging recess while being inserted through the communicating recess 54 and a communication hole 44. The shield case and the cylindrical shell are brought into contact and the insulator, the cylindrical shell and the insulation housing 5 are relatively positioned in a longitudinal direction in the shield case 6 fixed to a printed wiring board.

Description

  The present invention relates to a coaxial connector mounted on a printed wiring board, and more specifically, a leg portion of a shield case attached to the periphery of an insulating housing is soldered to the pattern of the printed wiring board, and mounting strength to the printed wiring board is increased. The present invention relates to a coaxial connector to be reinforced.

  When connecting a coaxial cable to the internal circuit of an electronic device, usually a coaxial connector is mounted on a printed wiring board installed in the device, and a mating connector such as a coaxial plug is connected to the end of the coaxial cable. Connected. The coaxial connector mounted on the printed wiring board has a central contact connected to the inner conductor of the mating connector and a cylindrical shell arranged coaxially around the central contact and connected to the outer conductor of the mating connector in the insulating housing. The attached leg portions are respectively soldered to the signal pattern and the ground pattern of the printed wiring board and mounted on the printed wiring board. As a result, the cylindrical shell arranged equidistantly around the axis of the center contact becomes the ground potential, and a high-frequency transmission path that matches the impedance of the coaxial cable is formed, and the cylindrical shell blocks the high-frequency signal path from the outside. Acts as a shield.

  When the coaxial connector configured in this way is a so-called in-vehicle connector that is used for connection between an electronic device in a vehicle and a coaxial cable, the mating connector that is connected due to vibration or aging changes unintentionally. Because it is coupled with the mating connector with high locking strength, when removing the mating connector, a strong pulling force acts on each leg part, and the solder connection part with the printed wiring board pattern is damaged and connected Defects may occur. Therefore, conventionally, the outer peripheral surface of the insulating housing is surrounded by a shield case made by bending a metal plate, and the soldering legs of the shield case are soldered to the pattern of the printed wiring board to reinforce the mounting strength on the printed wiring board. doing.

  Further, Patent Document 1 discloses a coaxial connector in which an outer peripheral surface of an insulating housing is surrounded by a shield case and a soldering leg portion of the shield case is soldered to a grounding pattern of a printed wiring board for the purpose of completely shielding the center contact. ing. Hereinafter, the conventional coaxial connector 100 will be described with reference to FIGS.

  As shown in FIG. 12, the coaxial connector 100 has a center contact 102 attached from the rear to a center hole drilled in the insulating housing 101 along the insertion direction of the mating connector, and an insulating housing 101 around the center hole. A cylindrical shell 103 that is coaxially attached to the center contact 102 in a drilled annular groove, and a shield case 104 that covers the outer peripheral surface and the rear surface of the insulating housing 101 are configured. The center contact 102 is inserted from the rear of the center hole until the leg portion 102a bent downward contacts the rear surface (left surface in the figure) of the insulating housing 101, and the locking piece is engaged with the inner surface of the center hole at that position. It stops and is positioned in the center hole in the front-rear direction. The cylindrical shell 103 is also inserted from the rear of the annular groove until a pair of L-shaped leg portions 103b connected to the rear end of the cylindrical sleeve 103a contact the rear surface of the insulating housing 101. At that position, the locking piece 103c is locked to the locking step portion 101a of the annular groove and positioned in the front-rear direction in the annular groove.

  The cylindrical sleeve 103a preferably surrounds the entire circumference of the central contact 102 around the same axis and shields the central contact 102. However, the cylindrical sleeve 103a, which is a complete cylindrical body, is inserted from the rear and attached to the insulating housing 101. Then, it is necessary to form the insulating housing 101 with two parts that separate the inside and outside of the cylindrical sleeve 103a, and a configuration for associating each of them in the front-rear direction with respect to the cylindrical sleeve 103a and an assembly process are added. Therefore, in the conventional coaxial connector 100, as shown in FIG. 13, a notch 105 is formed below the cylindrical sleeve 103a along the front-rear direction and separated, and the inside and outside of the cylindrical sleeve 103a are separated via the notch 105. The insulating housing 101 is integrated. On the other hand, since the notch 105 is formed in the cylindrical sleeve 103a, the center contact 102 cannot be completely shielded. Therefore, the same printed wiring board as the L-shaped leg portion 103b of the cylindrical shell 103 is connected by soldering. A shield case 104 in which soldering legs 104a are soldered to the ground pattern is attached to the outer peripheral surface of the insulating housing 101, and the entire periphery of the center contact 102 is surrounded without omission and is completely shielded.

JP 2009-64716 A

  In order to reinforce the mounting strength on the printed wiring board, the conventional coaxial connector that attaches the shield case soldered to the printed wiring board pattern to the outer peripheral surface of the insulating housing has a cylindrical shell with a ground potential. A shield case formed by bending a metal plate is adjacent to each other, and a potential difference is generated between them, which may adversely affect the high frequency characteristics of the coaxial connector.

  In addition, when inserting / removing the mating connector, the cylindrical shell attached to the insulating housing has a strong insertion / extraction force that exceeds the engagement portion set to a high locking strength in the insertion direction (front / rear direction). Further, positioning means for firmly positioning the cylindrical shell in the front-rear direction with respect to the insulating housing is required, the structure of each component is complicated, and the assembly process is complicated.

  Also, with respect to the conventional coaxial connector 100 disclosed in the above-mentioned Patent Document 1, since the shield case 104 and the cylindrical shell 103 are connected only via the ground pattern of the printed wiring board, the position away from the ground pattern There is a possibility that a potential difference occurs between the two and high frequency noise flows, and sufficient shielding performance cannot be obtained.

  Further, in order to prevent the cylindrical shell 103 receiving the insertion force in the insertion direction (rear) from slipping backward with respect to the insulating housing 101, the cylindrical shell 103 and the insulating housing 101 are respectively provided with a locking piece 103c and a locking step. Since it is necessary to form the portion 101a, the structure is complicated.

  Further, the locking piece 103c of the cylindrical shell 103 cannot be locked from the front to the locking step portion 101a unless it is inserted forward from the locking position with the locking step portion 101a. There is a possibility that play in the front-rear direction occurs in 103, and the strong insertion / extraction force received from the mating connector is concentrated on the playable cylindrical shell 103, and the solder connection portion with the ground pattern of the L-shaped leg portion 103b may be damaged. It was.

  The present invention has been made in view of such conventional problems, and has improved high-frequency characteristics and can be assembled by relatively positioning the shield case, the insulating housing, and the cylindrical shell with a simple configuration. A coaxial connector is provided.

  In addition, even if the cylindrical shell that is installed by being inserted through the positioning hole of the insulating housing is positioned without rattling in the insertion direction and receives a strong insertion / extraction force from the mating connector, the solder connection part of the cylindrical shell is damaged. Provide a coaxial connector that does not.

To achieve the above object, the coaxial connector according to claim 1 is formed with a center contact connected to the inner conductor of the mating connector inserted from the front to the rear, and a first positioning hole for inserting the center contact in the front-rear direction. An insulating insulator for positioning and supporting the center contact in the first positioning hole; a cylindrical shell having a cylindrical portion through which the insulator is inserted in the front-rear direction and coaxially attached to the center contact; A second positioning hole for inserting the cylindrical shell in the front-rear direction, an insulating housing for positioning and mounting the cylindrical shell in the second positioning hole, a soldering leg, and bending the conductive metal plate And shield case attached to the outer peripheral surface of the insulating housing to shield the printed circuit board pattern The soldering legs of the over scan solder connected to a coaxial connector for reinforcing the mounting strength of the printed wiring board,
An insertion hole and a communication recess are formed in the cylindrical shell and the insulating housing, respectively. With the cylindrical shell and the insulator attached to the insulating housing, engagement recesses that are recessed from the outer peripheral surface of the insulator are radially communicated with the communication hole. An opening is made on the outer peripheral surface of the insulating housing through the recess, and the cut-and-raised piece cut and raised from the portion covering the communication recess of the shield case is brought into contact with the periphery of the communication hole to bring the shield case and the cylindrical shell into contact with each other. The tip of the cut and raised piece inserted through the recess and the communication hole is engaged with the engagement recess of the insulator, and the insulator, the cylindrical shell, the insulating housing, and the shield case are relatively positioned in the front-rear direction.

  By inserting the cut-and-raised piece of the shield case through the communication recess of the insulation housing and the insertion hole of the cylindrical shell, and engaging the tip of the shield case with the engagement recess of the insulator, the insulator, the cylindrical shell, the insulation housing, and the shield The case is relatively positioned in the front-rear direction.

  In addition, since the cut-and-raised piece of the shield case that is inserted through the insertion hole of the cylindrical shell is in contact with and contacts the periphery of the communication hole, there is no potential difference between the cylindrical shell and the shield case, and high-frequency noise flows. Absent.

  The coaxial connector according to claim 2 is configured such that the width in the front-rear direction of the contact portion that passes through the insertion hole of the cut and raised piece is smaller than the width in the front-rear direction of the base end portion that passes through the communication recess, and the opening area of the insertion hole Is smaller than the opening area of the communication recess.

  Since the opening area of the insertion hole is smaller than the opening area of the communication recess, high-frequency noise is less likely to enter the center contact through the insertion hole, and high-frequency signals flowing through the center contact are less likely to leak to the outside.

  On the other hand, when the mating connector is inserted / removed, the width in the front / rear direction, which is the insertion / removal direction of the base end of the cut-and-raised piece that generates the maximum bending moment, is wider than the contact part, so that the cut-and-raised piece is plastically deformed. Hateful.

  The coaxial connector according to claim 3, wherein a part of the peripheral edge of the communication hole is cut and raised to form an inclined edge that is inclined toward the center of the insertion hole in the bending direction of the piece, and the cut and raised piece that is bent and inserted into the insertion hole is an inclined edge. It is characterized by being brought into pressure contact with.

  The width of the peripheral edge of the communication hole becomes narrower in the bending direction of the cut and raised piece, and the cut and raised piece is in pressure contact with the inclined edge by bending even after the cut and raised piece contacts the inclined edge.

The coaxial connector according to claim 4 is formed with a center contact connected to the inner conductor of the mating connector inserted from the front to the rear, and a first positioning hole through which the center contact is inserted in the front-rear direction. An insulating insulator which is positioned and supported inside, a cylindrical shell fixed on the outside of the insulator coaxially with the center contact by bending a conductive metal plate, and a second positioning for inserting the cylindrical shell in the front-rear direction A printed wiring board pattern comprising: an insulating housing in which a hole is formed and the cylindrical shell is positioned and attached in the second positioning hole; and a shield case having a soldering leg and attached to the outer peripheral surface of the insulating housing. A coaxial connector that reinforces the mounting strength on the printed circuit board by soldering the soldering legs of the shield case A data,
A communication recess and an engagement hole are formed in the insulating housing and the shield case, respectively. With the shield case attached to the insulation housing, the communication recess is radially opened to the outer peripheral surface of the shield case through the engagement hole to form a cylindrical shape. The outer cut and raised piece cut and raised outward from the portion communicating with the communication recess of the shell is inserted into the communication recess and engaged with the engagement hole of the shield case, and the shield case and the cylindrical shell are brought into contact with each other. The cylindrical shell, the insulating housing, and the shield case are relatively positioned in the front-rear direction.

  The cylindrical shell, the insulating housing, and the shield case are moved in the front-rear direction by inserting the outer cut-and-raised piece of the cylindrical shell into the communication recess of the insulating housing and engaging its tip with the engagement hole of the shield case. Relatively positioned.

  Further, since the outwardly raised piece of the cylindrical shell engages and comes into contact with the engagement hole of the shield case, there is no potential difference between the cylindrical shell and the shield case, and high-frequency noise does not flow.

  According to the first aspect of the present invention, the parts other than the center contact can be obtained by simply bending the cut-and-raised piece of the shield case attached to the outer peripheral surface of the insulating housing and engaging the tip of the cut-out piece with the engaging recess of the insulator. Relative positioning and assembly.

  Further, since the shield case and the cylindrical shell can be electrically connected at the same time in the assembly process, high-frequency noise hardly flows through the shield case and the cylindrical shell.

  Further, since the center contact is covered with the cylindrical shell and the shield case so as to overlap each other, the center contact can be shielded completely from the outside.

  According to invention of Claim 2, since the opening area of an insertion hole is comparatively small area, the shielding effect by a cylindrical shell can be maintained.

  Moreover, even if a strong insertion / extraction force is received from the mating connector, the insulating housing and the shield shell metal fitting can be positioned with respect to the insertion / extraction direction without plastic deformation of the cut and raised pieces.

  According to the invention of claim 3, the cut-and-raised piece of the shield case and the cylindrical shell can be electrically connected with low contact resistance.

  In addition, the cut-and-raised piece presses against the inclined edge of the insertion hole, so that the cylindrical shell is positioned without rattling by the cut-and-raised piece of the shield case fixed to the printed wiring board, and the mating connector insertion / extraction force Does not concentrate on the solder connection portion of the cylindrical shell, and does not cause poor solder connection with the pattern of the printed wiring board.

  According to the invention of claim 4, each of the cylindrical shell, the insulating housing, and the shield case can be obtained by bending the outward cut and raised piece of the cylindrical shell and engaging its tip with the engagement hole of the shield case. The parts are relatively positioned and assembled.

  Further, since the shield case and the cylindrical shell can be electrically connected at the same time in the assembly process, high-frequency noise hardly flows through the shield case and the cylindrical shell.

1 is a perspective view of a coaxial connector 1 according to a first embodiment of the present invention. 4 is a perspective view of a center contact 2. FIG. 3 is a perspective view of an insulator 3. FIG. 3 is a perspective view of a cylindrical shell 4. FIG. 4 is a perspective view of an insulating housing 5. FIG. 3 is a perspective view of a shield case 6. FIG. 1 is an exploded perspective view of a coaxial connector 1. FIG. (A) is the perspective view which shows the coaxial connector 1 which bent and assembled the cut-and-raised piece 7 of the shield case 6, and (b) is the perspective view which respectively shows the coaxial connector 1 except the shield case 6 from (a). (A) shows the coaxial connector 1 cut in front of the cut and raised piece 7, (b) shows the coaxial connector 1 cut along the center of the cut and raised piece 7, and (c) shows the shield from (a). It is a longitudinal cross-sectional view which shows the coaxial connector 1 except the case 6, respectively. It is a perspective view which shows the coaxial connector 10 which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the coaxial connector 12 which concerns on 3rd Embodiment of this invention. 1 is a longitudinal sectional view showing a conventional coaxial connector 100. FIG. 3 is a rear view of a cylindrical shell 103 of the coaxial connector 100. FIG.

  Hereinafter, a coaxial connector 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 9. A coaxial connector 1 according to an embodiment of the present invention is a so-called female receptacle connector mounted on a printed wiring board in an electronic device, and is coaxial with a counterpart connector connected to a terminal of a coaxial cable (not shown). Mating and connecting with the plug. Here, it is assumed that the coaxial plug is inserted into the coaxial connector 1 from the lower left in FIG. 1. In the following description of each part of the coaxial connector 1, the direction of connection with the coaxial plug is the front, and each direction viewed from the front is shown. The description will be made in the vertical and horizontal directions.

  As shown in these drawings, the coaxial connector 1 includes a center contact 2, an insulator 3, a cylindrical shell 4, and the like from the inside around the center axis, with a longitudinal axis of a fixing portion 21 described later of the center contact 2 as a center axis. The insulating housing 5 and the shield case 6 are assembled to overlap each other.

  As shown in FIG. 2, the center contact 2 is connected to a fixing portion 21 that is press-fitted into a contact receiving hole 31 (to be described later) of the insulator 3 and fixed to the front of the fixing portion 21, and the coaxial connector 1 is connected to the coaxial plug 1. The center connection portion 22 that comes into contact with the inner conductor of the coaxial plug when connected to the cable, and the signal leg portion 23 that is continuously connected in a crank shape downward from the rear end of the fixed portion 21 is used to process a conductive metal plate. Thus, they are integrally formed in the shape of an elongated rod. The signal leg 23 is formed in a crank shape so as to face a signal pattern formed on a corresponding portion of a printed wiring board (not shown) arranged along the bottom surface of the coaxial connector 1 and is solder-connected to the signal pattern. The

  The insulator 3 is formed in a cylindrical shape with an insulating synthetic resin so that the cylindrical shell 4 having a ground potential is coaxially disposed so as to be insulated from the center contact 2. As shown in FIG. A contact accommodating hole 31 (see FIG. 9A) for positioning and accommodating the center contact 2 is formed along the central axis of the main body 32, and contact is made from the outer peripheral surface of the cylindrical main body 32 around the axis behind the cylindrical main body 32. An annular engagement recess 33 having a depth that does not communicate with the accommodation hole 31 is provided. The rear end of the cylindrical body 32 is integrally formed with an insulating housing portion 34 that surrounds the signal leg 23 of the center contact 2 and is insulated from the surroundings. The rear of the signal leg 23 is hinged to the rear end of the cylindrical body 32. The insulating cover 34a of the combined insulating housing 34 is covered.

  As shown in FIG. 4, the cylindrical shell 4 is formed by pressing a conductive thin metal plate and accommodating a cylindrical grounding cylinder portion 42 that houses the insulator 3 inserted from the rear, and a rear side of the grounding cylinder portion 42. A pair of grounding leg portions 41 integrally connected downward on both sides and a retaining lid 43 hinged to the rear end of the grounding cylinder portion 42 are integrally formed. The cylindrical grounding cylinder portion 42 is arranged around the center of the center contact 2 by accommodating the insulator 3 in which the center contact 2 is positioned, and the coaxial plug 1 is connected to the coaxial plug when the coaxial connector 1 is connected to the coaxial plug. In contact with the outer conductor.

  The retaining lid 43 is formed with an engaging protrusion 43a that can be engaged with an engaging groove 41a that opens to the rear of the pair of grounding legs 41. In the state shown by the wavy line in FIG. 3 is accommodated in the grounding cylinder portion 42, then bent at a right angle as shown by a solid line, the engaging protrusion 43a is engaged with the engaging groove 41a, and the back of the insulator 3 is covered.

  The pair of grounding legs 41 are provided in an L shape on the left and right sides of the rear side of the grounding cylinder part 42, and the horizontal bottom faces the grounding pattern formed in the corresponding part of the printed wiring board. By connecting with solder, the entire cylindrical shell 4 is set to the ground potential.

  Longitudinal communication holes 44 are formed in left and right symmetrical positions from the rear of the grounding cylinder portion 42. Each communication hole 44 has an opening width in the front-rear direction of the upper opening wider than the lower opening, and the peripheral edges in the front-rear direction of the upper opening and the lower opening are inclined edges inclined downward toward the center in the front-rear direction of the communication hole 44. It is continuous at 44a. The insertion holes 44 on both the left and right sides are formed in a front-rear direction portion corresponding to the engagement recess 33 of the insulator 3. Therefore, when the insulator 3 is accommodated in the ground tube portion 42, the engagement recess 33 and the communication hole 44 communicate with each other. .

  Positioning protrusions 45 that project into guide grooves that are recessed in an inner wall surface of a positioning hole 51 (to be described later) of the insulating housing 5 project from two locations above and below the outer peripheral surface of the grounding cylinder portion 42. By engaging the positioning protrusion 45 with the guide groove and accommodating it in the positioning hole 51, the pair of grounding legs 41 of the cylindrical shell 4 are positioned around the axis so as to protrude downward behind the insulating housing 5. The

  As shown in FIG. 5, the insulating housing 5 uses an insulating synthetic resin excellent in heat resistance that is not deformed at a high temperature in a reflow furnace, and has a rectangular parallelepiped housing body 52 and a flange portion 55 at the front end of the housing body 52. An insertion tube portion 53 in which an insertion hole 53a for inserting a coaxial plug from the front is formed in front of the flange portion 55, and a lock protrusion 54 protruding forward from the flange portion 55 along the upper portion of the insertion tube portion 53. Are integrally formed. A positioning hole 51 is formed from the housing main body 52 to the insertion cylinder portion 53 to position and accommodate the grounding cylinder portion 42 of the cylindrical shell 4 in the front-rear direction along the inner central axis.

  On both the left and right side surfaces of the housing main body 52, communication recesses 54 that open from both sides to a plane and communicate with the positioning holes 51 are respectively provided. The communication recess 54 is formed in a front-rear direction portion corresponding to the insertion hole 44 formed in the grounding cylindrical portion 42 of the cylindrical shell 4, and accordingly, the grounding cylindrical portion 42 in which the insulator 3 is attached to the positioning hole 51 from the rear side. When inserted and positioned, the engaging recess 33 of the insulator 3, the communication hole 44 of the cylindrical shell 4, and the communication recess 54 communicate in a radial manner perpendicular to the central axis. Further, the center connection portion 22 and the grounding cylinder portion 42 of the center contact 2 are exposed coaxially with the insertion cylinder portion 53 through the cylindrical body 32 of the insulator 3 inside the insertion cylinder portion 53.

  The outer peripheral surface of the housing main body 52 of the insulating housing 5 is covered with a shield case 6 formed by bending a conductive metal plate. As shown in FIG. 6, the shield case 6 is formed in a U-shaped gate shape that surrounds the plane around the central axis and the left and right sides of the outer peripheral surface of the rectangular parallelepiped housing body 52, and the left and right side plates thereof. 6a and 6b are respectively formed with U-shaped cutouts to form cut-and-raised pieces 7 and 7 that can be bent inward with the lower end as a base end. The front ends of the side plates 6a and 6b project downward and serve as positioning plate portions 61 that pass through the through holes of the printed wiring board. The lower ends of the remaining side plates 6a and 6b are soldered legs bent outward at a right angle. Part 62 is formed.

  When the shield case 6 is attached to the outer peripheral surface of the insulating housing 5, the cut-and-raised pieces 7 and 7 are formed at corresponding portions on the outer side of the communication recess 54, as shown in FIGS. 8 (a) and 9 (a). Thus, when bent inward, the tip 71 reaches the insulator 3 and engages with the engagement recess 33 of the insulator 3.

  The width in the front-rear direction of the cut-and-raised piece 7 is formed narrower from the base end side toward the tip end side, and is bent inwardly from the base end portion 72 of the portion that is inserted through the communication recess 54 of the insulating housing 5. The width in the front-rear direction of the contact portion 73 at the portion that is inserted through the insertion hole 44 of the cylindrical shell 4 is narrow. The width in the front-rear direction of the base end portion 72 is the same as or slightly narrower than the width in the front-rear direction of the communication recess 54 of the insulating housing 5, whereby the front and rear side edges of the base end portion 72 are connected to the communication recess facing in the front-rear direction. 54 abuts against the inner wall surface. Further, the width in the front-rear direction of the contact portion 73 is narrower than the width in the front-rear direction of the upper opening of the communication hole 44 and wider than the width of the lower opening. Accordingly, in the process of bending the cut and raised piece 7 inward, the front and rear side edges of the contact portion 73 are in pressure contact with the inclined edge 44a and electrically connected to the cylindrical shell 4 with a minute contact resistance.

  In assembling the coaxial connector 1, first, the fixing portion 21 of the center contact 2 is press-fitted into the contact receiving hole 31 from the rear with the signal leg portion 23 facing downward, and the center connecting portion 22 is moved forward in the contact receiving hole 31. 3, the center contact 2 is fixed to the insulator 3, and then the rear side of the signal leg 23 is covered with an insulating lid 34 a bent at a right angle from the state shown by the wavy line in FIG. 3, and the periphery of the signal leg 23 is covered. Surrounded by an insulating housing 34.

  Subsequently, the cylindrical main body 32 of the insulator 3 to which the center contact 2 is attached is inserted from the rear side of the grounding cylindrical portion 42 of the cylindrical shell 4 so that the insulating housing portion 34 is disposed between the pair of grounding leg portions 41. And accommodated in the grounding cylinder portion 42. After the cylindrical main body 32 of the insulator 3 is accommodated in the grounding cylinder portion 42, the pair of engaging protrusions 43a of the retaining lid 43 in the state shown by the wavy line shown in FIG. The cylinder body 32 is engaged with 41 a and is prevented from coming off with respect to the rear, and is temporarily held in the grounding cylinder portion 42. In a state where the insulator 3 is temporarily held, the engagement recess 33 of the insulator 3 and the communication hole 44 of the cylindrical shell 4 communicate with each other.

  In the cylindrical shell 4 in which the center contact 2 and the insulator 3 are coaxially assembled, the grounding cylinder portion 42 is positioned in the positioning hole 51 while the positioning protrusion 45 is engaged with a guide groove formed in the inner wall surface of the positioning hole 51. Insert from behind. The cylindrical shell 4 in which the grounding cylindrical part 42 is inserted into the positioning hole 51 until the pair of grounding leg parts 41 abut the rear surface of the insulating housing 5 has the positioning projection 45 engaged with the guide groove, and FIG. 9C, the communication holes 44 formed on both the left and right sides are positioned around the central axis so as to face the communication recesses 54 formed in the left and right side walls of the insulating housing 5, respectively.

  Subsequently, from behind the insulating housing 5, the shield case 6 formed in a U-shaped shape so as to cover the housing main body 52 is slid, the front end is brought into contact with the rear surface of the flange portion 55 of the insulating housing 5, and The attachment piece at the rear end is bent to the rear surface of the insulating housing 5 and attached to the outer peripheral surface of the housing body 52. With the shield case 6 attached to the insulating housing 5, the cut-and-raised pieces 7 and 7 formed on both side plates 6 a and 6 b communicate with the engaging housing 33 and the communicating recess 54 in the radial direction. It faces the recess 54.

  In this state, as shown in FIGS. 8 (a), 9 (a) and 9 (b), when the cut-and-raised pieces 7 and 7 are bent from the proximal end toward the central axis, the distal end 71, the contact portion 73, and the base The end 72 is in contact with the front and rear inner wall surfaces or inclined edges 44a of the engaging recess 33, the insertion hole 44, and the communication recess 54, respectively, and the insulator 3, the cylindrical shell 4, and the insulating housing assembled around the central axis. 5 and the shield case 6 can be collectively positioned and fixed relative to the front-rear direction. At this time, the width in the front-rear direction in which the bending moment of the base end portion 72 of the cut-and-raised piece 7 where a larger bending moment is generated by receiving an insertion force or an extraction force from the mating plug is made wider than the distal end side. Therefore, the insulator 3, the cylindrical shell 4, and the insulating housing 5 can be firmly fixed to the shield case 6 with little bending in the front-rear direction. On the other hand, since the width in the front-rear direction of the contact portion 73 of the cut and raised piece 7 is narrower than the base end portion 72, the opening of the insertion hole 44 formed in the cylindrical shell 4 compared to the opening area of the communication recess 54. The area can be reduced, and the shielding effect by the cylindrical shell 4 and the shielding case 6 can be maintained.

  Further, since the cut-and-raised piece 7 is bent and the contact portion 73 is pressed between the inclined edges 44a from above, the shield case 6 and the cylindrical shell 4 that are grounded can be electrically connected with low contact resistance.

  The coaxial connector 1 assembled by relatively positioning all the components is positioned on the board by inserting the positioning plate portion 61 protruding below the shield case 6 through the through hole of the printed wiring board to be mounted. In this state, the signal leg 23 exposed along the bottom surface of the insulating housing 5 is soldered to the signal pattern formed on the corresponding portion of the printed circuit board, and the ground leg 41 and the soldering leg 62 are respectively associated. Solder connection is made to the ground pattern formed at the site. Thereby, the circumference of the center contact 2 connected to the signal pattern around the coaxial is surrounded by the cylindrical shell 4 and the shield case 6 connected to the ground pattern, and around the center contact 2 connected to the inner conductor of the coaxial plug. Since the cylindrical shell 4 and the shield case 6 are brought into contact with each other via the cut-and-raised piece 7, the high-frequency noise does not flow through the long conductive path of the cylindrical shell 4 or the shield case 6, and the high-frequency noise is more effectively applied. Can be shut off.

  The cut-and-raised piece 7 is not necessarily cut and raised from the left and right side plates 6 a and 6 b of the shield case 6, and is formed by cutting and raising from any surface of the shield case 6 that covers the outer peripheral surface around the central axis of the insulating housing 5. Also good. Hereinafter, a coaxial connector 10 according to a second embodiment of the present invention in which a cut piece 11 is cut and raised from a shield case 6 covering the plane of the insulating housing 5 will be described with reference to FIG. In FIG. 10, the same number is used for the same or similar configuration as the coaxial connector 1 according to the first embodiment, and the detailed description thereof is omitted.

  In the coaxial connector 10, the engagement concave portion 33 of the insulator 3, the insertion hole 44 of the cylindrical shell 4, and the communication concave portion 54 of the insulating housing 5 are respectively formed in upper portions, and the engagement concave portion 33 and the communication hole 44 are The communication recess 54 communicates along a vertical line above the center axis. The cut-and-raised piece 11 is formed by drilling a U-shaped cutout in a flat portion of the shield case 6 that covers the communication recess 54, and can be bent inward toward the front with the rear end as a base end. It has become.

  When the shield case 6 is attached to the outer peripheral surface of the insulating housing 5 to which the center contact 2, the insulator 3, and the cylindrical shell 4 are attached in an overlapped manner from the inside on the center axis side, and the cut and raised piece 11 is bent inward, the tip portion And the base end portion through which the communication recess 54 is inserted contact the engaging recess 33, the insertion hole 44, and the front wall or the front edge of the communication recess 54, respectively. And the shield case 6 are electrically connected to each other, and the insulator 3, the cylindrical shell 4 and the insulating housing 5 which are assembled by being inserted from the rear side are prevented from being detached from the rear side, and the shield case 6 fixed to the printed wiring board is collectively attached. And can be positioned in the front-rear direction.

  Further, the cut-and-raised pieces 7 and 11 are cut and raised from the shield case 6, but like the coaxial connector 12 according to the third embodiment shown in FIG. It may be cut and raised and bent outward. Also for the coaxial connector 12, the same reference numerals are used for the same or similar configurations as those of the coaxial connector 1 according to the first embodiment, and detailed description thereof is omitted.

  In the coaxial connector 12 according to the third embodiment, the insertion hole 44 is not formed in the grounding cylinder portion 42, and a U-shaped notch is formed in a portion where the insertion hole 44 is formed in the first embodiment. The outer cut-and-raised pieces 13 and 13 that can be bent outwardly with the lower end as the base end are formed. On the other hand, in the shield case 6 according to the first embodiment, engagement holes 14 and 14 are formed in the portions where the cut and raised pieces 7 are cut and raised so that the outer cut and raised pieces 13 and 13 engage with each other.

  Similarly, the coaxial connector 12 has a shield case 6 attached to the outer peripheral surface of an insulating housing 5 in which the center contact 2, the insulator 3, and the cylindrical shell 4 are attached in an overlapping manner from the inside on the center axis side. The outer cut-and-raised pieces 13, 13 standing upward in 14 are horizontally bent outward and engaged between the inner edges of the engagement holes 14, 14 facing each other in the front-rear direction. As a result, the cylindrical shell 4 and the shield case 6 are electrically connected via the outer cut-and-raised piece 13, and are inserted into the shield case 6 fixed to the printed wiring board and assembled from behind. The shell 4 and the insulating housing 5 are prevented from coming out backward, and can be assembled by positioning them in the front-rear direction collectively.

  In the above-described embodiment, the width in the front-rear direction of the cut and raised pieces 7 and 11 is made narrower from the base end side toward the tip end side, but is not necessarily limited to this embodiment and may be the same width. .

  Further, the center contact 2 surrounded and shielded by the grounded cylindrical shell 4 is one, but a coaxial connector in which a plurality of contacts are surrounded by the cylindrical shell 4 may be used. In some cases, the cylindrical shell and other components are not necessarily formed in a cylindrical shape.

  The present invention is suitable for an in-vehicle coaxial connector that requires high locking strength with a mating connector.

1 Coaxial connector (first embodiment)
2 Center contact 3 Insulator 31 Contact accommodation hole (first positioning hole)
33 Engaging recess 4 Cylindrical shell 42 Grounding cylinder (cylindrical part)
44 Insertion hole 44a Inclined edge 5 Insulating housing 51 Positioning hole (second positioning hole)
54 communication recess 6 shield case 62 soldering leg 7 cut and raised piece 71 distal end 72 base end 73 contact 10 coaxial connector (second embodiment)
11 Cut and raised pieces 12 Coaxial connector (Third embodiment)
13 External cut and raised piece 14 Engagement hole

Claims (4)

A center contact connected to the inner conductor of the mating connector inserted from the front to the rear;
A first positioning hole through which the center contact is inserted in the front-rear direction; an insulating insulator for positioning and supporting the center contact in the first positioning hole;
A cylindrical shell having a cylindrical portion for inserting the insulator in the front-rear direction, and being attached to the outside of the insulator coaxially with the center contact;
A second positioning hole through which the cylindrical shell is inserted in the front-rear direction; an insulating housing that positions and installs the cylindrical shell in the second positioning hole;
A soldering leg, and a shield case attached to the outer peripheral surface of the insulating housing by bending a conductive metal plate;
A coaxial connector that reinforces the mounting strength to the printed wiring board by soldering the soldering legs of the shield case to the pattern of the printed wiring board,
An insertion recess and a communication recess are formed in the cylindrical shell and the insulating housing, respectively, and an engagement recess that is recessed from the outer peripheral surface of the insulator in a state where the cylindrical shell and the insulator are attached to the insulating housing. Radially opening the outer peripheral surface of the insulating housing through the communication hole and the communication recess,
A cut and raised piece cut and raised from a portion of the shield case that covers the communication recess is brought into contact with a peripheral edge of the communication hole so that the shield case and the cylindrical shell are brought into contact with each other, and the communication recess and the communication hole are inserted. Coaxially characterized by engaging the tip of the cut-and-raised piece with the engaging recess of the insulator and relatively positioning the insulator, the cylindrical shell, the insulating housing, and the shield case in the front-rear direction. connector. A width in the front-rear direction of the contact portion through which the cut-and-raised piece is inserted through the insertion hole is formed to be smaller than a width in the front-rear direction of the base end portion through which the communication recess is inserted, and an opening area of the insertion hole is defined as the communication recess The coaxial connector according to claim 1, wherein the coaxial connector has a small area with respect to the opening area. A part of the peripheral edge of the communication hole is formed as an inclined edge inclined toward the center of the insertion hole in the bending direction of the cut and raised piece, and the cut and raised piece that is bent and inserted into the insertion hole is pressed against the inclined edge. The coaxial connector according to claim 1, wherein the coaxial connector is characterized in that A center contact connected to the inner conductor of the mating connector inserted from the front to the rear;
A first positioning hole through which the center contact is inserted in the front-rear direction; an insulating insulator for positioning and supporting the center contact in the first positioning hole;
A cylindrical shell fixed on the outside of the insulator coaxially with the center contact by bending a conductive metal plate;
A second positioning hole through which the cylindrical shell is inserted in the front-rear direction; an insulating housing that positions and installs the cylindrical shell in the second positioning hole;
A soldering leg, and a shield case attached to the outer peripheral surface of the insulating housing;
A coaxial connector that reinforces the mounting strength to the printed wiring board by soldering the soldering legs of the shield case to the pattern of the printed wiring board,
A communication recess and an engagement hole are formed in the insulating housing and the shield case, respectively, and the communication recess is radiated radially through the engagement hole in a state where the shield case is attached to the insulation housing. Open to the surface,
An outer cut and raised piece cut and raised outward from a portion communicating with the communication recess of the cylindrical shell is inserted into the communication recess and engaged with an engagement hole of the shield case, and the shield case and the A coaxial connector, wherein a cylindrical shell is brought into contact, and the cylindrical shell, the insulating housing, and the shield case are relatively positioned in the front-rear direction.

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