CN102365790B - Coaxial connector for inspection - Google Patents

Abstract

Provided is a coaxial connector for inspection which can be fitted to a mating receptacle with an appropriate force. An inspection coaxial connector (1) which is detachably mounted on an object side socket which is an object to be inspected and has an external conductor. The housing (25) has a tubular front end portion (26a) into which the external conductor is inserted, and the front end portion (26a) has a structure in which the diameter thereof is expandable and contractible. The probe (10) extends in the distal end portion (26a) in an insulated state from the housing (25). The regulating member (50) has: a limiting part (50b) arranged opposite to at least one part of the outer peripheral surface of the cylindrical front end part (26a) and a cylindrical fixing part (50a) mounted on the shell (25). The diameter of the fixing portion (50a) is larger than that of the tip portion (26 a). When the mating receptacle is mounted, the diameter expansion of the tip end portion (26a) is restricted by the tip end portion (26a) contacting the restricting portion (50 b).

Description

Coaxial connector for inspection

technical field

The present invention relates to a coaxial connector for inspection, and more specifically, relates to a coaxial connector for inspection that can be attached to and detached from a receptacle on an object to be inspected.

Background technique

An inspection device for a coaxial connector with a switch described in Patent Document 1 is known as a conventional coaxial connector for inspection. Hereinafter, this inspection device will be described with reference to the drawings. (a) of FIG. 8 is a cross-sectional configuration diagram of the front end portion of the inspection device 101 described in Patent Document 1. As shown in FIG. (b) of FIG. 8 is the coaxial connector 201 to which the inspection device 101 is attached. In FIG. 8 , the direction in which the probe 110 extends is defined as the vertical direction.

The inspection device 101 is installed at the tip of a coaxial cable (not shown), and includes a probe 110 , a sleeve 120 , and a housing 125 as shown in FIG. 8( a ). The probe 110 extends vertically and is connected to the central conductor of the coaxial cable. The case 125 is formed in a cylindrical shape, and is connected to a shield conductor of a coaxial cable (not shown). The detector 110 is inserted into the casing 125 . Sleeve 120 insulates probe 110 from housing 125 .

The inspection device 101 having the above configuration is mounted on the coaxial connector 201 as shown in FIG. 8( a ). The coaxial connector 201 is, for example, a coaxial connector with a switch provided between an antenna of a mobile phone and a transmission and reception circuit, and includes a case 203 , an external conductor 205 , a fixed terminal 206 , and a movable terminal 207 . The fixed terminal 206 is connected to the antenna, and the movable terminal 207 is connected to the transceiver circuit. In addition, as shown in (b) of FIG. 8 , usually, since the fixed terminal 206 is in contact with the movable terminal 207, the antenna and the transmission and reception circuit are connected. In addition, when installing a manufacturer to check the electrical characteristics of the transceiver circuit of a mobile phone, as shown in FIG. hole 204 . As a result, the movable terminal 207 is pushed down by the probe 110 in the direction of the arrow a. As a result, the fixed terminal 206 is separated from the movable terminal 207, and the probe 110 and the movable terminal 207 are connected, whereby the transmission and reception circuit and the measuring device are connected.

In addition, when the inspection device 101 is attached to the coaxial connector 201 , the outer conductor 205 is inserted into the housing 125 as shown in FIG. 8( a ). At this time, the case 125 is slightly elastically deformed in a direction in which the diameter becomes wider when the outer conductor 205 is in contact with the inner peripheral surface. As a result, the housing 125 pinches the outer conductor 205 , and the inspection device 101 is fixed to the coaxial connector 201 .

However, in the inspection device 101, it is difficult to fit the case 125 to the outer conductor 205 with an appropriate force as described below. More specifically, in recent years, the miniaturization of the coaxial connector 201 has been promoted in response to the need for miniaturization of mobile phones. When the size of the coaxial connector 201 is reduced, the diameter of the outer conductor 205 shown in FIG. 8 is also reduced. Accordingly, the diameter of the case 125 into which the outer conductor 205 is inserted is also reduced.

As described above, as the diameter of the case 125 becomes smaller, the elastically deformable range of the case 125 becomes smaller. Therefore, if the diameter of the case 125 is made small in order to fit the case 125 to the outer conductor 205 with a sufficiently large force, the case 125 may be plastically deformed. In addition, if the diameter of the case 125 is made large so that the case 125 does not undergo plastic deformation, the case 125 cannot be fitted to the outer conductor 205 with a sufficiently large force. Therefore, the inspection device 101 has a problem that it is necessary to process the casing 125 with high precision, and the manufacturing cost becomes high.

Patent Document 1: Japanese Patent Laid-Open No. 2004-319227 (FIG. 11)

Contents of the invention

Therefore, an object of the present invention is to provide a coaxial connector for inspection that can be fitted to a counterpart socket with an appropriate force.

The coaxial connector for inspection according to one aspect of the present invention is capable of being attached to and detached from a receptacle on the target side, which is an object to be inspected, having an outer conductor. The coaxial connector for inspection is characterized in that it includes: a cylindrical front end portion into which an external conductor is inserted; a probe extending inside the front end portion in a state of being insulated from the case; and a restricting member having a restricting portion and a cylindrical fixing portion, wherein the The restricting portion is provided to face at least a part of the outer peripheral surface of the front end portion, the cylindrical fixing portion is attached to the housing, the diameter of the fixing portion is larger than the diameter of the front end portion, The front end portion has a structure in which the diameter of the front end portion can expand and contract, and the diameter expansion of the front end portion is restricted by contacting the front end portion with the restricting portion when the counterpart socket is assembled.

According to the present invention, the coaxial connector for inspection can be fitted to the mating socket with an appropriate force.

Description of drawings

FIG. 1 is a cross-sectional structural view of an inspection coaxial connector according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the coaxial connector for inspection in FIG. 1 .

Fig. 3 is an exploded perspective view of the inspection coaxial connector of Fig. 1 .

Fig. 4 is a plan view of a restricting member.

Fig. 5 is an exploded perspective view of the detector.

6 is a cross-sectional structural view of the front end portion of the coaxial connector for inspection before and after assembly to the object socket which is the object to be inspected.

7 is a perspective view and a plan view of a restriction member according to a modification.

In FIG. 8 , (a) is a cross-sectional structural view of the front end portion of the inspection device described in Patent Document 1, and (b) is a coaxial connector to which the inspection device is attached.

Detailed ways

(Structure of coaxial connector for inspection)

Hereinafter, the configuration of the inspection coaxial connector according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2 . FIG. 1 is a cross-sectional structural view of an inspection coaxial connector 1 according to an embodiment of the present invention. FIG. 2 is an external perspective view of the inspection coaxial connector 1 of FIG. 1 . FIG. 3 is an exploded perspective view of the inspection coaxial connector 1 of FIG. 1 . FIG. 4 is a plan view of the restricting member 50 . In FIGS. 1 and 2 , the direction in which the probe 10 extends is defined as an up-down direction.

As shown in FIG. 1 , the coaxial connector 1 for inspection includes a probe 10 , a sleeve 20 , a case 25 , and a restricting member 50 . As shown in FIG. 1 , the probe 10 is composed of a plunger 11 , a coil spring 12 and a plunger case 13 . The plunger 11 is, as shown in FIG. 1 , a pin made of beryllium copper having a flat portion at the upper end. The plunger case 13 is a brass cylindrical member having an opening on the lower side. A plunger 11 and a coil spring 12 are inserted into the plunger case 13 . Thereby, when the plunger 11 is pressed from the lower side, the coil spring 12 can contract and retract upward.

In addition, the center conductor 41 of the coaxial cable 40 is welded on the upper side of the plunger sleeve 13 . Since the outer peripheral surface near the upper end of the plunger 11 is in contact with the inner peripheral surface of the cylindrical portion of the plunger case 13 , the plunger 11 and the center conductor 41 are electrically connected via the plunger case 13 .

The housing 25 is provided with the disk 21, the upper part 25a, and the lower part 25b, as shown in FIGS. 1-3. The upper part 25a is a cylindrical body made of a relatively large-diameter conductive member (for example, beryllium copper). An opening 29 is provided in the upper part 25a. The lower part 25b is provided integrally with the upper part 25a on the lower side of the upper part 25a, and is a cylindrical body made of a relatively small-diameter conductive member (for example, beryllium copper). The upper part 25 a and the lower part 25 b are electrically connected to the shield conductor 42 of the coaxial cable 40 via the adapter 43 .

The lower portion 25b includes a front end portion 26a and a protrusion 26b as shown in FIG. 1 . The front-end part 26a is the front-end part of the lower side of the lower part 25b, and the outer conductor of the mating socket mentioned later is inserted. The front end portion 26a has a smaller diameter than the portion of the lower portion 25b other than the front end portion 26a, and has a structure in which the diameter of the front end portion 26a is expandable and contractible. Specifically, as shown in FIG. 3 , the front end portion 26 a is provided with a slit S2 extending upward from the front end of the front end portion 26 a. Thereby, when the slit S2 expands by the elasticity of the front-end|tip part 26a, the front-end|tip part 26a can expand in a horizontal direction. Moreover, as shown in FIG. 1, the protrusion part 26b is provided so that it may protrude toward the center direction of the front-end|tip part 26a on the inner peripheral surface of the front-end|tip part 26a.

The disk 21 is a disk-shaped member, and is provided so as to close the upper opening of the upper part 25 a of the casing 25 as shown in FIG. 1 .

The sleeve 20 is a cylindrical body made of an insulator such as resin. The probe 10 is inserted and fixed in the sleeve 20 as shown in FIG. 1 . The front end of the probe 10 protrudes from the front end of the sleeve 20 .

In addition, the sleeve 20 into which the probe 10 is inserted is inserted into and fixed to a cylindrical case 25 as shown in FIG. 1 . Since the sleeve 20 is made of an insulator, the probe 10 is insulated from the housing 25 . In addition, the plunger 11 extends inside the front end portion 26 a of the housing 25 and protrudes from the front end portion 26 a.

The restricting member 50 has a fixing part 50a and a restricting part 50b as shown in FIGS. 1 to 4 . The fixing part 50a is formed in a cylindrical shape as shown in FIG. 4, and is attached to the case 25. As shown in FIG. Specifically, the inner diameter of the fixing portion 50a is larger than the outer diameter of the front end portion 26a. Furthermore, the fixing part 50a is fixed to the case 25 by being pressed into the lower part 25b of the case 25 from the front end part 26a side (that is, the lower side). The fixing part 50a is fixed to the lower part 25b on the upper side of the front end part 26a, as shown in FIG.

As shown in FIG. 4, the restricting part 50b is connected to the lower side of the fixing part 50a, and has a cylindrical shape. However, the restriction part 50b is C-shaped by providing the slit S1 extended in the up-down direction. Thereby, the restriction|limiting part 50b has the structure whose diameter can expand and contract. Thereby, the slit S1 becomes wide by the elasticity of the restriction part 50b, and the restriction part 50b can expand horizontally.

In addition, the inner diameter of the restriction part 50b is slightly larger than the outer diameter of the front-end|tip part 26a. Therefore, when the fixing part 50a is attached to the lower part 25b, the restriction|limiting part 50b is provided so that the periphery of the front-end|tip part 26a may be surrounded. That is, the inner peripheral surface of the restriction part 50b is provided so that it may oppose at least a part of the outer peripheral surface of the front-end|tip part 26a. In addition, as shown in FIG. 1 , the lower end of the restricting portion 50b coincides with the lower end of the front end portion 26a. The restricting portion 50b configured as described above plays a role of restricting the diameter expansion of the front end portion 26a when the mating socket is assembled, as will be described later.

(Assembly sequence of the coaxial connector for inspection)

Next, an assembly procedure of the inspection coaxial connector 1 will be described with reference to FIGS. 3 and 5 . FIG. 5 is an exploded perspective view of the probe 10 .

First, as shown in FIG. 5 , the probe 10 is assembled by inserting the coil spring 12 and the plunger 11 into the plunger case 13 from below. Next, as shown in FIG. 3 , the probe 10 is inserted into the center hole of the sleeve 20 from the upper side. Next, the sleeve 20 is inserted into the center hole of the housing 25 from the upper side.

Next, as shown in FIG. 3 , the center conductor 41 of the coaxial cable 40 is inserted through the opening 29 of the case 25 (see FIG. 1 ) and welded to the groove 13 a of the plunger sleeve 13 . Thus, the central conductor 41 is electrically connected to the plunger 11 via the plunger sleeve 13 and the coil spring 12 . In addition, an adapter 43 connected to the shield conductor 42 of the coaxial cable 40 is fitted into the opening 29 of the housing 25 , and the ring 44 is crimped to the outer peripheral portion of the adapter 43 . Thus, the shield conductor 42 is brought into electrical conduction with the case 25 via the adapter 43 . In addition, as shown in FIG. 1 , a connection connector 45 (see FIG. 1 ) for connecting to an unillustrated measuring instrument is provided at one end of the coaxial cable 40 .

Next, as shown in FIG. 3 , the disk 21 is placed on the upper surface of the casing 25 . Finally, the restricting member 50 is pressed into the lower part 25b. Thereby, the inspection coaxial connector 1 shown in FIG. 1 and FIG. 2 is completed.

(Check the operation of the coaxial connector)

Next, the operation of the inspection coaxial connector 1 will be described with reference to FIG. 6 . FIG. 6 is a cross-sectional structural view of the front end portion of the inspection coaxial connector 1 before and after attachment to the target socket 301 which is the object to be inspected.

First, the target outlet 301 will be described. The counterparty socket 301 is, for example, a coaxial connector with a switch provided between an antenna of a mobile phone and a transmission and reception circuit, and includes a case 303 , an external conductor 305 , a fixed terminal 306 and a movable terminal 307 . The fixed terminal 306 is connected to the antenna, and the movable terminal 307 is connected to the transceiver circuit.

First, a state in which the inspection coaxial connector 1 is not attached to the counterparty socket 301 will be described. As shown in FIG. 6( a ), the probe 10 protrudes downward from the front end portion 26 a and the restricting portion 50 b. In addition, the outer peripheral surface of the front-end|tip part 26a and the control part 50b contact slightly, or are separated with a slight gap. At this time, in the counterparty socket 301, as shown in (a) of FIG. 6 , since the fixed terminal 306 is in contact with the movable terminal 307, the antenna is connected to the transmission and reception circuit.

Next, a state in which the inspection coaxial connector 1 is attached to the counterparty socket 301 will be described. When installing the manufacturer to check the electrical characteristics of the transceiver circuit of the mobile phone, as shown in FIG. As a result, the movable terminal 307 is pushed downward by the probe 10 . As a result, the fixed terminal 306 is separated from the movable terminal 307, the probe 10 is connected to the movable terminal 307, and the transmitting and receiving circuit is connected to the measuring device. At this time, the coil spring 12 is contracted by the repulsive force from the movable terminal 307, and the probe 10 retracts upward. Accordingly, damage to the movable terminal 307 is prevented.

In addition, in the state of FIG.6(b), the outer conductor 305 is inserted into the front-end|tip part 26a. The inner diameter of the tip portion 26 a is slightly smaller than the outer diameter of the outer conductor 305 . Therefore, the front end portion 26 a is slightly expanded by the outer conductor 305 . However, in the state of FIG. 6( a ), the outer peripheral surface of the front end portion 26 a is in contact with the inner peripheral surface of the restricting portion 50 b or is separated with a slight gap. Therefore, when the front end portion 26a is widened, the outer peripheral surface of the front end portion 26a is in pressure contact with the inner peripheral surface of the restricting portion 50b. As a result, the restricting portion 50b is slightly expanded by the front end portion 26a. Thereby, the restricting part 50b suppresses excessive expansion of the front-end|tip part 26a. Then, the protrusion 26 b engages with the groove 305 a formed on the outer periphery of the outer conductor 305 , and the front end portion 26 a and the restricting portion 50 b come into contact with the upper surface 305 b of the outer conductor 305 . As a result, the inspection coaxial connector 1 is fitted into the counterpart socket 301 with an appropriate force.

(Effect)

The inspection coaxial connector 1 configured as described above can be fitted to the mating socket 301 with an appropriate force as described below. More specifically, in recent years, the miniaturization of the coaxial connector 201 of the type shown in FIG. 8 has been advanced in response to the need for miniaturization of mobile phones. When the size of the coaxial connector 201 is reduced, the diameter of the outer conductor 205 shown in FIG. 8 is also reduced. Accordingly, the diameter of the case 125 into which the outer conductor 205 is inserted is also reduced.

As described above, as the diameter of the case 125 becomes smaller, the elastically deformable range of the case 125 becomes smaller. Therefore, if the diameter of the case 125 is made small in order to fit the case 125 to the outer conductor 205 with a sufficiently large force, the case 125 may be plastically deformed. On the other hand, if the diameter of the case 125 is made large to avoid plastic deformation of the case 125, the case 125 cannot be fitted to the outer conductor 205 with a sufficiently large force. As a result, the inspection device 101 has a problem that it is necessary to process the housing 125 with high precision, which increases the manufacturing cost.

Therefore, the restriction part 50b is provided in the coaxial connector 1 for inspection. As shown in FIG. 6( b ), when the inspection coaxial connector 1 is attached to the counterpart receptacle 301 , the restricting portion 50 b is slightly expanded by the front end portion 26 a. Therefore, compared with the conventional inspection device 101, only the force of fastening the outer conductor 205 by the housing 125 is fitted into the coaxial connector 201, and the coaxial connector 1 for inspection uses the force of fastening the outer conductor 305 by the front end portion 26a and The restricting portion 50b tightens the force of the front end portion 26a and fits into the mating socket 301 .

In the coaxial connector 1 for inspection as described above, the restricting portion 50b assists the tightening of the outer conductor 305 by the front end portion 26a. Thereby, the force with which the front-end|tip part 26a is tightened can be made smaller than the force with which the case 125 is tightened. As a result, plastic deformation of the front end portion 26a can be suppressed by making the diameter of the front end portion 26a larger or by forming the slit S2 larger. In addition, in the coaxial connector 1 for inspection, since there is a fastening force of the restricting part 50b, even if the diameter of the front end part 26a is made larger, or the slit S2 is formed larger, the coaxial connection for inspection will not be possible. The device 1 can also be fitted into the counterpart socket 301 with an appropriate force.

In addition, the coaxial connector 1 for inspection can easily attach the restricting member 50 to the lower part 25b as described below. More specifically, in the inspection coaxial connector 1, the restricting member 50 is composed of a fixing portion 50a and a restricting portion 50b. Moreover, as shown in FIG. 1, the fixing part 50a and the restricting part 50b have an inner diameter larger than the outer diameter of the front-end|tip part 26a. Thereby, the front-end|tip part 26a can pass in the fixed part 50a and the restricting part 50b. As a result, in the coaxial connector 1 for inspection, the restricting member 50 can be attached to the portion 25b from the lower side. Thereby, in the coaxial connector 1 for inspection, it can attach to the lower part 25b by the simple operation of pushing in from the lower side, without deforming the fixed part 50a and the restricting part 50b.

In addition, in the coaxial connector 1 for inspection, as shown in FIG. touch. Therefore, the restricting portion 50b is pushed upward by the repulsive force from the outer conductor 305 . As a result, the press-fitting of the fixing portion 50 a into the lower portion 25 b is repeated every time the inspection coaxial connector 1 is attached to the counterpart socket 301 . As a result, the restriction member 50 is suppressed from coming off from the lower portion 25b.

In addition, in the coaxial connector 1 for inspection, as shown in FIG. touch. Therefore, in the coaxial connector 1 for inspection, the width in the horizontal direction of the portion of the coaxial connector 1 for inspection that contacts the outer conductor 305 becomes larger than when the restricting portion 50 b does not contact the outer conductor 305 . Therefore, the coaxial connector 1 for inspection is less likely to be tilted due to external force or the like, and less likely to fall off from the counterpart socket 301 .

In addition, in the coaxial connector 1 for inspection, the restricting member 50 is composed of a fixing portion 50a and a restricting portion 50b. The fixing portion 50a functions to fix the restricting member 50 to the lower portion 25b, and the restricting portion 50b functions to restrict the expansion of the front end portion 26a. In this way, since the two configurations of the restricting member 50 perform respective functions, compared with the case where one configuration serves two functions, it is possible to perform designs suitable for the fixing portion 50a and the restricting portion 50b respectively.

(Modification)

Hereinafter, a restriction member 50' according to a modified example will be described with reference to the drawings. FIG. 7 is a perspective view and a plan view of a restriction member 50' according to a modified example.

In the restricting member 50, a slit S1 is provided as shown in FIG. 4 . On the other hand, in the restricting member 50', a plurality of (four) slits S1 are provided as shown in FIG. 7 . Thus, the number of slits S1 should just be one or more.

In addition, the coaxial connector 1 for inspection is connected to the measuring device via the coaxial cable 40 , and may be directly connected to the measuring device without the coaxial cable 40 , for example.

Industrial Utilization Possibility

The present invention is useful for a coaxial connector for inspection, and is particularly excellent in that it can be fitted to a counterpart socket with an appropriate force.

Explanation of reference signs

S1, S2: slit; 1: coaxial connector for inspection; 10: detector; 11: plunger; 12: coil spring; 13: plunger sleeve; 20: sleeve; 21: disc; 25: housing ; 25a: upper part; 25b: lower part; 26a: front end; 26b: protruding part;

Claims (6)

1. A coaxial connector for inspection, which can be freely attached to and detached from the socket of the object to be inspected, which has an external conductor, The coaxial connector for inspection is characterized by having: a housing having a cylindrical front end portion into which the outer conductor is inserted; a probe extending within the front end portion in a state of being insulated from the housing; and A restricting member having a restricting portion and a cylindrical fixing portion, wherein the restricting portion is provided to face at least a part of the outer peripheral surface of the front end portion, and the cylindrical fixing portion is attached to the housing body, the diameter of the fixing portion is larger than the diameter of the front end portion, The front end portion has a structure in which the diameter of the front end portion is stretchable, When the mating socket is attached, the diameter expansion of the front end portion is restricted by the contact of the front end portion with the restriction portion. 2. The coaxial connector for inspection according to claim 1, wherein: The fixing portion is press-fitted from the front end portion side with respect to the housing. 3. The coaxial connector for inspection according to claim 1 or 2, wherein: The restricting portion is formed in a cylindrical shape facing an outer peripheral surface of the front end portion. 4. The coaxial connector for inspection according to claim 3, wherein: One or more first slits extending along a direction in which the probe extends are provided in the restricting portion. 5. The coaxial connector for inspection according to claim 1 or 2, wherein: One or more second slits extending along a direction in which the detector extends are provided on the front end portion. 6. The coaxial connector for inspection according to claim 1 or 2, wherein: The restricting portion is in contact with the mating socket when the mating socket is mounted.

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