JP2007042336A - Plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plug for a coaxial cable of which a dielectric is made of foamed fluororesin and a plug for a discrete wire capable of using constituent components in common. <P>SOLUTION: A housing has cavities 11a to 11e in which a contact to be connected to a mate side contact is press fitted from an opening at the other side. A cover housing 2 is connected to the housing 1 so as to surround the contact. One end part 31 of a shell 3 holds the housing 1 and the cover housing 2 so as to envelop them, and the other end 32 holds a cable holder 4. The contact of a plug 10 for the coaxial cable is composed of a first contact 5 and a second contact 6 to which a terminal part of the coaxial cable 5c is connected by soldering. The contact of a plug 100 for a discrete wire is composed of three first contacts 5 to which terminal part of the discrete wire 5d is connected by soldering. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plug for electrical connection. The plug of the present invention is attached to a terminal of a coaxial cable or a terminal of a discrete wire, and is connected to a receptacle.

  For example, a semiconductor test apparatus for testing a semiconductor component such as a packaged IC or wafer includes a test head having a DUT board on which a DUT (Device Under Test) is mounted or a test board in contact with the DUT. Inside this test head, a large number of rectangular receptacles connected to the wire connecting plug are arranged radially.

  The receptacle is connected to a coaxial cable plug provided at the end of the coaxial cable and a discrete wire plug provided at the end of the discrete wire. For example, 40 coaxial cable plugs and 20 discrete wire plugs are connected to one receptacle.

  The coaxial cable plug to which the coaxial cable is connected is easy to process, attach and connect to the end of the coaxial cable, and can easily produce contacts, etc., and can reduce the cost. A coaxial cable plug that ensures a good shielding effect has been invented (see, for example, Patent Document 1).

  The coaxial cable plug according to Patent Document 1 includes a signal contact, a ground contact, and first and second insulators.

  The signal contact is formed of a conductive plate and includes a signal connection arm and a central conductor connection portion. The signal connection arm is provided with a tuning fork-shaped contact connection at one end. The center conductor connecting portion is coupled to the other end of the signal connection arm, and the center conductor of the coaxial cable is connected by pressure welding.

  The ground contact is formed of a conductive plate and includes a ground connection arm and an external conductor connection portion. The ground connection arm is arranged so as to surround the signal contact only in a predetermined range, and a tuning fork-shaped contact connection portion is provided at one end portion. The outer conductor connecting portion is coupled to the other end of the ground connection arm, and the outer conductor of the coaxial cable is connected by pressure welding.

The first insulator is arranged and press-fitted so that each contact connection portion of the signal contact and the ground contact is on the fitting end side with the mating connector. The second insulator holds one end side of the coaxial cable by dividing and arranging the central conductor and the outer conductor in different parts, and is coupled to the first insulator to connect the central conductor of the coaxial cable to the central conductor connecting portion of the signal contact. The outer conductor of the coaxial cable is connected to the outer conductor connecting portion of the ground contact.
JP 2002-134236 A

  For example, in the coaxial cable used in the test head described above, the dielectric surrounding the center conductor is formed of a foamed fluororesin, so-called Teflon (registered trademark). Such a coaxial cable using a foamable fluororesin containing a large amount of an air layer in a dielectric is particularly useful for a semiconductor test apparatus that transmits high-speed measurement and measurement.

  However, the coaxial cable plug according to Patent Document 1 has a problem that the connection of the coaxial cable is unstable because the contact connects the coaxial cable by pressure contact and the dielectric made of foamed fluororesin is too flexible. There is. It is preferable to connect the coaxial cable having a dielectric made of such foamable fluororesin by solder bonding to a contact provided on the coaxial cable plug.

  Further, the receptacle provided in the above-described test head has a plurality of slots in which the coaxial cable plug and the discrete wire plug can be shared. Therefore, by making the components of the coaxial cable plug and the discrete wire plug common, there are advantages that the manufacturing cost of the parts can be reduced and the assembling work can be simplified. These can be said to be the problems of the present invention.

  In view of such problems, the present invention provides a coaxial cable plug for connecting a coaxial cable made of a foamed fluororesin with a dielectric surrounding a central conductor by solder bonding, and a discrete wire for connecting a discrete wire by solder bonding. The purpose of the plug is to provide a plug that can share components.

  In order to satisfy the above-mentioned object, the inventor has invented the following new plug, in which the first contact for attaching the central conductor of the coaxial cable by soldering has a structure in which the core of the discrete wire can be attached by soldering.

  (1) A mating contact is inserted from one opening side, a housing having a plurality of cavities into which contacts connected to the mating contact are press-fitted from the other opening, and the housing is coupled so as to surround the contact A cover housing, one end of which is held so as to enclose the housing and the cover housing, and the other end of which is a plug holding a cable holder, wherein the contact is connected to the end of the coaxial cable by soldering The first and second contacts are connected to each other, and the first contact is a plug capable of connecting a terminal of a discrete wire by soldering.

  The plug according to the invention of (1) includes a housing having a plurality of cavities, a cover housing, and a shell. The mating contact is inserted from one opening side of the cavity. A contact connected to the mating contact is press-fitted from the other opening of the cavity. The cover housing is coupled to the housing so as to surround the contact. One end of the shell is held so as to enclose the housing and the cover housing. The other end of the shell holds the cable holder.

  The housing may have an insulating property and may be a housing made of a non-conductive material. For example, an engineering plastic may be molded to obtain an insulating housing having a desired shape having a plurality of cavities. it can. For example, the housing is formed in a substantially rectangular parallelepiped shape, and a plate-like portion protrudes from the other opening side.

  For example, as will be described later, the mating contact may be a blade contact, and a first rectangular hole into which the blade contact is inserted is opened on one side of the housing. For example, as will be described later, the contact connected to the counterpart contact has a tuning-fork-shaped first contact connection portion that is connected so as to sandwich the blade contact, and the first contact connection portion is inserted. A second rectangular hole is opened on the other side of the housing. The second rectangular hole penetrates from one opening side to the other opening side, and when the housing is viewed from one opening side, the first and second rectangular holes intersect so as to form a cross.

  The cover housing may be insulating and may be a cover housing made of a non-conductive material. For example, an engineering cover can be molded to obtain an insulating cover housing having a desired shape. The housing and the cover housing are preferably made of the same material, but are not limited to the same material. For example, the cover housing is formed in a substantially rectangular parallelepiped shape, and is provided with a recess on one surface. Then, the cover housing is assembled and coupled to the housing such that the plate-like portion of the housing and the recess of the cover housing surround the contact. The fact that the housing and the cover housing are coupled so as to surround the contact does not deny that the coaxial cable or discrete wire soldered to the contact extends from the space surrounded by the plate-shaped portion and the recess.

  The shell is preferably formed of a metal plate, more preferably a metal plate having electromagnetic shielding properties. For example, the metal plate can be bent to obtain a metal shell having a desired shape. . For example, one end portion of the shell is formed in a concave shape, and one end portion of the shell is inserted from the other end side of the housing to which the cover housing is coupled, and is held so as to enclose the housing and the cover housing. One end of the shell constitutes an outer shell on the other end side of the plug. The other end of the shell is U-shaped, and the tip of the U-shaped piece is bent to hold the cable holder.

  In the plug according to the invention of (1), the contact is composed of the first and second contacts that connect the ends of the coaxial cable by soldering. The first contact can connect the end of the discrete wire by soldering.

  The first and second contacts connect the ends of the coaxial cable by soldering, as will be described later, the first contact has a first joint that can be soldered to the central conductor of the coaxial cable. The second contact has a second joint portion capable of soldering the outer conductor of the coaxial cable. In the coaxial cable plug, the first and second contacts are press-fitted into the housing. The fact that the first contact can connect the end of the discrete wire by solder joint indicates that the first joint can connect the core wire of the discrete wire by solder joint, as will be described later. For example, in the plug for discrete wires, three first contacts that connect the ends of the discrete wires by soldering are press-fitted into the housing.

  When the plug according to the invention of (1) is used as a plug for a coaxial cable, since the first and second contacts connect the ends of the coaxial cable by soldering, the dielectric surrounding the central conductor is foamable. Even a coaxial cable made of fluororesin can be securely connected to the contact. In addition, the plug according to the invention of (1) reduces the cost of manufacturing parts because the components for the housing, cover housing, shell, cable holder, and first contact are shared by the coaxial cable plug and the discrete wire plug. In addition, there is an effect that the assembling work can be simplified.

  (2) The first contact is connected to the counterpart contact, and is provided on a tuning fork-shaped first contact connection portion to be press-fitted into the cavity, and on a base end side of the first contact connection portion, and the coaxial contact The plug according to (1), further comprising: a first joint portion capable of soldering a center conductor of the cable or a core wire of the discrete wire.

  The first contact is made of a conductive metal plate and includes a tuning fork-shaped first contact connection portion and a first joint portion. The tuning-fork-shaped first contact connecting portion may be a tuning-fork-shaped elastic contact piece that applies a contact force in a direction facing by two arms, for example, a blade that is a counterpart contact between two arms. By inserting the contact, the first contact and the counterpart contact can be electrically connected. Fine protrusions are formed on both wings of the base end portion of the first contact connecting portion, and when the first contact connecting portion is inserted into the cavity, the fine protrusion is locked to the inner wall of the cavity and can be press-fitted. The two arms can be opened and closed within the cavity.

  For example, the first joint has a cylindrical closed barrel and an open barrel opened in a U-shape, and after the end of the central conductor of the coaxial cable is formed with a predetermined dimension, preliminary soldering is performed, The end of the central conductor is inserted into the closed barrel and placed on the open barrel. And the terminal of the center conductor of a coaxial cable is connected to the 1st junction part by soldering. Also, after the end of the core wire of the discrete wire is formed to a predetermined size, preliminary soldering is performed, and the end of the core wire is inserted into the closed barrel and placed on the open barrel. And the terminal of the core wire of a discrete wire is connected to a 1st junction part by soldering.

  Thus, in the plug according to the invention of (2), the first contact can be connected to either the central conductor of the coaxial cable or the core wire of the discrete wire by soldering.

  (3) The second contact is provided on a base end portion side of the second contact connection portion, a second contact connection portion in which the first contact connection portion is disposed in a pair and a base end portion is coupled, A plug according to (1) or (2), comprising: a second joint portion capable of soldering the outer conductor of the coaxial cable.

  The second contact is made of a conductive metal plate and includes a second contact connection portion and a second joint portion. The second contact connection portion has a pair of tuning fork-shaped first contact connection portions and a base end portion coupled thereto. The outer conductor of the coaxial cable is connected to the second joint by solder joint.

  For example, the second joint portion has a cylindrical closed barrel and an open barrel opened in a U shape, and after the end of the outer conductor of the coaxial cable is formed with a predetermined dimension, preliminary soldering is performed, The end of the outer conductor is inserted into the closed barrel and placed on the open barrel. And the terminal of the outer conductor of a coaxial cable is connected to the 2nd junction part by soldering.

  In this way, by connecting the contact with the coaxial cable by soldering, the coaxial cable can be reliably held in the plug, and this holding state can be stably maintained. Also, in the coaxial cable pressure connection, there are many places where the signal path bends at right angles, and when high-frequency signals are transmitted through the coaxial cable, this part becomes a component with a large inductance, and the characteristic impedance increases, so that the signal reflection is reduced. Become more. On the other hand, in the connection by the solder joint of the coaxial cable, it is possible to straighten the connection portion of the coaxial cable and the contact, the characteristic impedance can be easily matched, and the mismatched portion can be made as short as possible. There is a merit that reflection by a high frequency signal is also reduced.

  (4) The cable holder has a first hole capable of holding the coaxial cable substantially in the center of the axis, and a plurality of second holes communicating with the first hole around the first hole and capable of holding the discrete wire. The plug according to any one of (1) to (3), wherein a hole is provided.

  The cable holder is preferably made of a synthetic resin material. For example, an engineering plastic made of the same material as the housing and the cover housing can be molded to obtain a cable holder having a desired shape. For example, the one end side of the cable holder is formed in a substantially quadrangular prism shape, and the one end side of the cable holder is inserted into the shell. The other end portion side of the cable holder is formed in a substantially cylindrical shape, and the other end portion side of the cable holder is held by the other end portion of the shell.

  The cable holder is provided with a slit that partially divides the cable holder, and this slit extends from one outer surface of the cable holder to one second hole and further to the first hole. When the other end of the shell is closed by crimping the other end of the cable holder, the diameter of the first hole is reduced, and the coaxial cable inscribed in the first hole can be securely held by the plug. Further, for example, the three second holes are radially divided from the center of the first hole, and the discrete wires inscribed in the three second holes are in contact with each other. Therefore, when the other end of the shell is closed by crimping the other end of the cable holder, the diameter of the first hole is reduced, and the discrete wires inscribed in the three second holes can be securely held by the plug. .

  Thus, in the plug according to the invention of (4), the cable holder is a common part that can hold the coaxial cable or the discrete wire. Further, for example, when the cable holder is formed of a synthetic resin material, the coaxial cable or the plurality of discrete wires are held with elasticity.

  (5) The plug according to any one of (1) to (4), wherein the counterpart contact is a blade contact inserted into the cavity.

  (6) The plug according to any one of (1) to (5), wherein the coaxial cable is made of a foamed fluororesin and a dielectric surrounding the central conductor.

  When the plug according to the present invention is used as a plug for a coaxial cable, since the first and second contacts connect the ends of the coaxial cable by soldering, the dielectric surrounding the central conductor is made of foamable fluororesin. Even a coaxial cable made of this can be securely connected to the contact. In addition, the plug according to the present invention shares components of the housing, the cover housing, the shell, the cable holder, and the first contact with the coaxial cable plug and the discrete wire plug. There is an effect that the assembling work can be simplified.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is an exploded perspective view showing an embodiment of a plug according to the present invention. FIG. 1 shows components when a plug according to the present invention is used as a plug for a coaxial cable. FIG. 2 is a plan view of a terminal of a coaxial cable used for the plug of the embodiment. FIG. 3 is a configuration diagram in which the first and second contacts are assembled to the housing of the plug according to the embodiment. 3A is a plan view and FIG. 3B is a front view.

  FIG. 4 is a front view in which the cover housing is assembled to the plug of the embodiment. FIG. 5 is a front view in which the cable holder is assembled to the plug of the embodiment. FIG. 6 is a front view in which a shell is assembled to the plug of the embodiment. FIG. 7 is a front view in which a shell is assembled to the plug of the embodiment. FIG. 7 is a state change diagram of FIG. FIG. 8 is a front view showing a state before the other end of the shell is crimped to the plug of the embodiment. FIG. 9 is a front view showing a state in which the other end of the shell is crimped to the plug of the embodiment. FIG. 2 to FIG. 9 show state change diagrams according to a series of assembly orders when the plug according to the present invention is used as a plug for a coaxial cable.

  FIG. 10 is a right side view of the plug according to the embodiment. FIG. 10A is a right side view when the plug according to the present invention is used as a plug for a coaxial cable, and shows the cross section of the coaxial cable. FIG. 10B is a right side view when the plug according to the present invention is used as a plug for discrete wires, and shows three discrete wires in cross section. FIG. 11 is a cross-sectional view of the cable holder of the embodiment. FIG. 11A shows a coaxial cable in section. FIG. 11B shows three discrete wires in cross section.

  FIG. 12 is a block diagram when the plug according to the present invention is used as a discrete wire plug. 12A is a front view, FIG. 12B is a bottom view of FIG. 12A, FIG. 12C is a plan view of FIG. 12A, and FIG. 12D is FIG. FIG. 12E is a right side view of FIG.

  First, the configuration of the plug according to the present invention will be described. In FIG. 1, a plug 10 according to the present invention includes a housing 1 having a plurality of cavities 11a to 11e, a cover housing 2, and a shell 3. A mating contact (not shown) is inserted from one opening side of the cavities 11a to 11e. A contact connected to the counterpart contact is press-fitted from the other openings of the cavities 11a to 11e. The cavities 11d and 11e may be empty terminals. The cover housing 2 is coupled to the housing 1 so as to surround the contacts. One end of the shell 3 is held so as to enclose the housing 1 and the cover housing 2. The other end of the shell 3 holds the cable holder 4.

  FIG. 1 shows a plug according to the present invention as a plug 10 for a coaxial cable, in which the first and second contacts 5 and 6 connect the terminals of the coaxial cable 5c (see FIG. 2) by soldering. It consists of On the other hand, FIG. 12 shows a plug according to the present invention as a discrete wire plug 100, and the contact is composed of three first contacts 5 for connecting the ends of the discrete wires 5d by soldering ( (See FIG. 1).

  In FIG. 1, the housing 1 is molded from an insulating synthetic resin. The housing 1 is formed in a substantially rectangular parallelepiped shape with one portion having a plurality of cavities 11 a to 11 e, and the other portion has a plate-like portion 12. It protrudes.

  In FIG. 1, for example, the mating contact is a blade contact, and a first rectangular hole into which the blade contact is inserted is opened on one side of the housing 1. The first and second contacts 5 and 6 connected to the mating contact have a tuning fork-shaped first contact connecting portion 51 connected so as to sandwich the blade contact, and the first contact connecting portion 51 is inserted. A second rectangular hole is opened on the other side of the housing 1. The second rectangular hole penetrates from the other opening side to the one opening side, and when the housing 1 is viewed from the one opening side, the first and second rectangular holes intersect so as to form a cross ( (See FIG. 12D).

  In FIG. 1, a cover housing 2 is formed by molding an insulating synthetic resin, and the cover housing 2 is formed in a substantially rectangular parallelepiped shape, and a concave portion 21 is provided on one surface. The cover housing 2 is assembled and coupled to the housing 1 such that the plate-like portion 12 of the housing 1 and the recess 21 of the cover housing 2 surround the first and second contacts 5 and 6 (see FIGS. 4 and 5). ). In the coaxial cable plug 10, the coaxial cable 5 c extends from the space surrounded by the plate-like portion 12 and the recess 21 (see FIG. 5). In the discrete wire plug 100, three discrete wires 5d extend from the space surrounded by the plate-like portion 12 and the recess 21 (see FIG. 12).

  1 and 6, the shell 3 is formed of a metal plate having electromagnetic shielding properties, and one end portion 31 of the shell 3 is formed by bending to form a concave shape. One end 31 of the shell 3 is inserted from the other end of the housing 1 to which the cover housing 2 is coupled, and is held so as to enclose the housing 1 and the cover housing 2 (see FIGS. 8 and 12). The other end 32 of the shell 3 is formed in a U-shape, and the tip of the U-shaped piece is bent to hold the cable holder 4.

  In FIG. 11, the coaxial cable 5c has a central conductor c1 composed of a stranded wire, and the dielectric c2 surrounds the central conductor c1. For example, the dielectric c2 may be made of a foamable fluororesin. Further, the outer conductor c3 surrounds the dielectric c2. The outer conductor c3 is formed of a braided wire, for example. The outer conductor c3 is covered with an insulating coating c4. On the other hand, the discrete wire 5d has a core wire d1 composed of a stranded wire, and the core wire d1 is covered with an insulating coating d2.

  In FIG. 1, the first contact 5 is made of a conductive metal plate, and includes a tuning fork-shaped first contact connection portion 51 and a first joint portion 52. The first contact connecting portion 51 is a tuning fork-shaped elastic contact piece that applies a contact force in a direction facing by the two arms 51a and 51b. For example, by inserting a blade contact that is a counterpart contact between the two arms 51a and 51b, the first contact 5 and the counterpart contact can be electrically connected. A plurality of fine projections 51c are formed on both wings of the base end portion of the first contact connection portion 51. When the first contact connection portion 51 is inserted into the central cavity 11c, the plurality of fine projections 51c are formed on the inner wall of the cavity 11c. Lock and press-fit are possible. The two arms 51a and 51b can be opened and closed in the cavity 11c.

  In FIG. 3, the 1st junction part 52 can connect the center conductor c1 of the coaxial cable 5c by soldering. As the coaxial cable plug 10, the first contact 5 is press-fitted into the cavity 11c (see FIG. 1). Further, the first joint portion 52 can connect the core wire d1 of the discrete wire 5d by solder joint. As the discrete wire plug 100, the first contact 5 is press-fitted into the cavities 11a to 11c (see FIG. 12).

  In FIG. 3, the 1st junction part 52 has the cylindrical closed barrel 52a and the open barrel 52b opened in the U-shape. After the end of the center conductor c1 of the coaxial cable 5c is formed with a predetermined dimension, preliminary soldering is performed (see FIG. 2). The end of the center conductor c1 is inserted into the closed barrel 52a and placed on the open barrel 52b. Then, the end of the central conductor c1 is connected to the first joint portion 52 by solder joint. Further, after the end of the core wire d1 of the discrete wire 5d is formed with a predetermined dimension, preliminary soldering is performed (not shown). The end of the core wire d1 is inserted into the closed barrel 52a and placed on the open barrel 52b. The end of the core wire d1 of the discrete wire 52d is connected to the first joint portion 52 by solder joint.

  In FIG. 1, the second contact 6 is made of a conductive metal plate and includes a second contact connection portion 61 and a second joint portion 62. The second contact connection portion 61 has a tuning fork-shaped first contact connection portion 51 disposed in a pair and a base end portion coupled thereto. The second joint portion 62 can connect the outer conductor c3 of the coaxial cable 5c by solder joint (see FIG. 3). The second contact connecting portion 61 is inserted into the lower cavities 11a and 11b.

  In FIG. 3, the 2nd junction part 62 has the cylindrical closed barrel 62a and the open barrel 62b opened in the U-shape. After the end of the outer conductor c3 of the coaxial cable 5c is formed with a predetermined dimension, preliminary soldering is performed (see FIG. 2). The end of the outer conductor c3 is inserted into the closed barrel 62a and placed on the open barrel 62b. Then, the end of the external conductor c3 is connected to the second joint portion 62 by solder joint.

  In FIG. 1, the cable holder 4 is formed of a synthetic resin material. One end portion side of the cable holder 4 is a prismatic portion 41 formed in a substantially quadrangular prism shape, and the prismatic portion 41 is inserted into the shell 3. The other end portion side of the cable holder 4 is a cylindrical portion 42 formed in a substantially cylindrical shape, and the cylindrical portion 42 is held by the other end portion 32 of the shell 3.

  In FIG. 10, the cable holder 4 is provided with a first hole 43h capable of holding the coaxial cable 5c substantially at the center of the axis. In addition, the cable holder 4 is provided with three second holes 44h that communicate with the first hole 43h and can hold the discrete wire 5d around the first hole 43h.

  In FIG. 10, the cable holder 4 is provided with slits 4s for partially dividing the cable holder 4 (see FIG. 1). The slit 4s extends from one outer surface of the cable holder 4 to one second hole 44h and further to the first hole 43h. When the other end portion 32 of the shell 3 presses and closes the cylindrical portion 42 (see FIG. 8), the diameter of the first hole 43h is reduced, and the coaxial cable 5c inscribed in the first hole 43h is securely plugged. Can be retained.

  Further, the three second holes 44h are radially divided from the center of the first hole 43h, and the discrete wires 5d inscribed in the three second holes 44h are in contact with each other. Therefore, when the other end portion 32 of the shell 3 presses and closes the cylindrical portion 42, the first hole 43h is reduced in diameter, and the discrete wire 5d inscribed in the three second holes 44h is securely connected to the plug 100. Can be held (see FIG. 12).

  Next, a method for assembling the coaxial cable plug 10 shown in FIG. 1 will be described.

  First, the end of the coaxial cable 5c is processed. In FIG. 2, the dielectric c2 is cut to a length L1 from the tip of the center conductor c1. The outer conductor c3 is cut to a length of L2 from the tip of the dielectric c2. The insulating coating c4 is cut to a length L3 from the tip of the center conductor c1. In the above processing, a jacket strip is preferably used so that the outer conductor c3 which is a braided wire does not open. Then, preliminary solder is applied to the center conductor c1 and the outer conductor c3.

  Next, the end of the center conductor c1 is inserted into the closed barrel 52a and placed on the open barrel 52b. Then, the end of the central conductor c1 is connected to the first joint portion 52 by solder joint. Further, the end of the outer conductor c3 is inserted into the closed barrel 62a and placed on the open barrel 62b. Then, the end of the external conductor c3 is connected to the second joint portion 62 by solder joint.

  Next, the cover housing 2 is assembled to the housing 1 (see FIG. 4). And the cable holder 4 is assembled | attached to the subassembly with which the housing 1 and the cover housing 2 couple | bond (refer FIG. 5). Next, a coaxial cable is inserted into the shell 3 (see FIG. 6). Next, when the shell 3 is moved to the housing 1 (see FIG. 7), the shell 3 is locked to the housing 1 (see FIG. 8). In FIG. 8, the cable holder 4 can be held by crimping the other end 32 of the shell 3 with a crimping tool (see FIG. 9).

  When the plug according to the present invention is used as a plug for a coaxial cable, since the first and second contacts connect the ends of the coaxial cable by soldering, the dielectric surrounding the central conductor is made of foamable fluororesin. Even a coaxial cable made of this can be securely connected to the contact. In addition, the plug according to the present invention shares components of the housing, the cover housing, the shell, the cable holder, and the first contact with the coaxial cable plug and the discrete wire plug. There is an effect that the assembling work can be simplified.

  Furthermore, the plug according to the present invention can securely hold the coaxial cable in the plug by connecting the contact of the coaxial cable by soldering, and can maintain this holding state stably. Also, in the coaxial cable pressure connection, there are many places where the signal path bends at right angles, and when high-frequency signals are transmitted through the coaxial cable, this part becomes a component with a large inductance, and the characteristic impedance increases, so that the signal reflection is reduced. Become more. On the other hand, in the connection by the solder joint of the coaxial cable, it is possible to straighten the connection portion of the coaxial cable and the contact, the characteristic impedance can be easily matched, and the mismatched portion can be made as short as possible. There is a merit that reflection by a high frequency signal is also reduced.

1 is an exploded perspective view showing an embodiment of a plug according to the present invention. It is a top view of the terminal of the coaxial cable used for the plug of the embodiment. It is the block diagram by which the 1st and 2nd contact was assembled | attached to the housing of the plug of the said embodiment. It is a front view by which a cover housing is assembled | attached to the plug of the said embodiment. It is a front view by which a cable holder is assembled | attached to the plug of the said embodiment. It is a front view by which a shell is assembled | attached to the plug of the said embodiment. It is a front view by which a shell is assembled | attached to the plug of the said embodiment. It is a front view which shows the state before the other end part of a shell is crimped | bonded to the plug of the said embodiment. It is a front view which shows the state by which the other end part of the shell was crimped | bonded to the plug of the said embodiment. It is a right view of the plug of the embodiment. It is a cross-sectional view of the cable holder of the embodiment. It is a block diagram in the case of using the plug by this invention as a plug for discrete wires.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Cover housing 3 Shell 4 Cable holder 5 * 6 1st and 2nd contact 5c Coaxial cable 5d Discrete wire 10 Coaxial cable plug 11a-11e Cavity 100 Discrete wire plug

Claims (6)

A housing having a plurality of cavities in which a mating contact is inserted from one opening side, and a contact connected to the mating contact is press-fitted from the other opening; and a cover housing coupled to the housing so as to surround the contact; The one end is held so as to wrap the housing and the cover housing, and the other end is a shell that holds the cable holder,
The contact is composed of first and second contacts that connect the ends of the coaxial cable by soldering,
The first contact is a plug that can connect a terminal of a discrete wire by soldering.   The first contact is provided with a tuning fork-shaped first contact connection portion that is connected to the counterpart contact and is press-fitted into the cavity, and is provided on the base end side of the first contact connection portion. The plug according to claim 1, further comprising: a first joint portion capable of soldering a conductor or a core wire of the discrete wire.   The second contact is provided on the proximal end portion side of the second contact connection portion, in which the first contact connection portion is disposed in a pair and the proximal end portion is coupled, and the coaxial cable is provided. The plug according to claim 1, further comprising: a second joint portion capable of solder-joining the outer conductor.   The cable holder has a first hole that can hold the coaxial cable substantially at the center of the axis, and a plurality of second holes that can communicate with the first hole and hold the discrete wire around the first hole, The plug according to claim 1, wherein the plug is provided.   The plug according to any one of claims 1 to 4, wherein the counterpart contact is a blade contact inserted into the cavity.   The plug according to any one of claims 1 to 5, wherein in the coaxial cable, a dielectric surrounding the central conductor is made of a foamed fluororesin.

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