JP2011138637A - Insertion-coupling method between contact probe and receptacle and contact probe used for this method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the same amount of calling-in as compared with a conventional one by a further compact contact probe, and to stabilize contact characteristics of a contact probe and a receptacle. <P>SOLUTION: The insertion-coupling method of the contact probe includes: a step in which an inverted cone-shaped calling-in protrusion of a tip of a cylindrical insulator fitted in free back-and-forth movement on an outer periphery of a central conductor is made to contact and slide on a slant wall part of a mortar-shaped concave part of the receptacle, and the protrusion is called in until it reaches the bottom part of the mortar-shaped concave part when a contact probe is pushed down in a condition where a receptacle is deviated from an axis center; and a step of pushing down the cylindrical shell of the outer periphery of the receptacle after finishing the calling-in, to make the guide part in contact with a whole outer peripheral surface of the shell of the receptacle by sliding the guide part fitted to the tip of the shell and enlarged to an outer peripheral edge side while bringing the guide part into contact with the outer peripheral edge part of the shell of the receptacle to match both axis centers. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method of fitting a receptacle and a contact probe in a case where a contact probe is fitted to a receptacle such as a coaxial connector with a switch and inspected by using an automatic inspection machine, and a contact probe used in this method. is there.

As shown in FIG. 5, there is known a conventional method for aligning the coaxial connector 80 with a switch with the contact probe 72 when the coaxial connector 80 with a switch as a receptacle is automatically inspected using the contact probe 72. (Patent Document 1).
The coaxial connector with switch 80 has a very small diameter of about 2 mm, and includes a first housing 81 made of an insulating material, a pin insertion hole 82, a shell 89 made of a conductive metal, a fixed terminal 83, and a movable terminal. 85 and is mounted on the pattern electrode 79 of the printed circuit board 78.

The center conductor 74 of the contact probe 72 is fitted into the pin insertion hole 82 of the coaxial connector 80 with a switch as described above, and the contact portion 87 of the movable terminal 85 is pushed down by the tip surface 75 of the center conductor 74, The signal path to the movable terminal 85 is switched to the signal path from the movable terminal 85 to the central conductor 74 and inspected.
Such an inspection is performed by installing the contact probe 72 on the machine and automatically fitting it to the coaxial connector 80 with a switch. When the axial center of the coaxial connector 80 with switch is shifted from the axial center of the contact probe 72 at the time of this fitting, the axial center of the contact probe 72 is called to coincide with the axial center of the coaxial connector 80 with switch. Is called. For this purpose, in the conventional contact probe 72, an inwardly tapered guide surface 76 is formed at the tip of the outer conductor 73.

  In such a configuration, when the contact probe 72 is pushed down and the outer peripheral edge of the shell 89 of the coaxial connector 80 with the switch comes into contact with the guide surface 76 of the outer conductor 73, the coaxial connector with switch 80 becomes the axial center of the contact probe 72. It is called by sliding in the direction corresponding to. Even if they do not completely coincide with each other, if the center conductor 74 is further pushed down, the tip surface 75 is guided by the mortar-shaped recess 90 of the first housing 81 and the axial centers thereof approach each other. Since the diameter D1 of the center conductor 74 is set to be smaller than the diameter D2 of the pin insertion hole 82, the center conductor 74 is fitted into the pin insertion hole 82, and the contact portion 87 of the movable terminal 85 is pushed down. The fixed contact portion 84 of the movable terminal 85 is separated and the switch is turned off. Then, the signal path from the fixed terminal 83 to the movable terminal 85 is switched to the signal path from the movable terminal 85 to the central conductor 74 and inspected.

JP 2003-123910 A

The conventional contact probe 11 has the following problems.
(1) Since the guide surface 76 of the outer conductor 73 is in contact with the shell 89 of the coaxial connector 80 with switch while being pushed in, the coaxial connector 80 with switch has a diameter of 2.0 mm, for example. In this case, the diameter of the outer conductor 73 is required to be 3.2 mm or more when the axial deviation between the contact probe 72 and the coaxial connector 80 with switch is 0.6 mm, and the shape of the outer conductor 73 becomes large. It was.
(2) When the outer conductor 73 of the contact probe 72 becomes larger, the area of the fitting portion with the switch-equipped coaxial connector 80 becomes several times that of the switch-equipped coaxial connector 80. The area occupied by has increased.
(3) The shell 89 of the coaxial connector 80 with a switch for performing the calling and the outer conductor 73 of the contact probe 72 are both made of metal, and are moved while sliding only by the contact between the metals. There was a problem that metal powder was generated.

The purpose of the present invention is to improve the tip of the contact probe that fits into the receptacle, enabling the same amount of calling as before with a smaller contact probe, and stabilizing the contact characteristics between the contact probe and the receptacle. It is to plan.

According to the first aspect of the present invention, there is provided a method for fitting a receptacle and a contact probe.
In the method of aligning the axial center of the receptacle and the contact probe and fitting the tip contact portion of the center conductor of the contact probe into the pin insertion hole of the receptacle,
When the contact probe is pushed down in a state where the receptacle and the contact probe are misaligned, an inverted frustoconical calling protrusion at the tip of a cylindrical insulator provided on the outer periphery of the central conductor is provided on the outer periphery of the receptacle. Sliding while making contact with the inclined wall portion of the mortar-shaped recess, at least one of the receptacle and the contact probe is in a direction substantially orthogonal to the pressing direction of the contact probe, and the calling protrusion is the mortar-shaped Calling up to the bottom of the recess,
After completion of the pull-in, the cylindrical shell provided on the outer periphery of the receptacle is pushed down, and the guide portion provided at the tip of the shell and extending toward the outer peripheral edge is slid while being in contact with the outer peripheral edge of the receptacle shell. A step of bringing the guide portion into contact with the entire outer peripheral surface of the shell of the receptacle so that the axes of the guides coincide with each other;
The center conductor is pushed out with the shaft center aligned, and the tip contact portion of the center conductor descends through the pin insertion hole in the center of the receptacle, pushes down the movable terminal, releases the contact with the fixed terminal, and moves. And switching the signal path from the terminal to the central conductor.

According to the present invention, the contact probe according to claim 2 comprises:
In the contact probe in which the axial center of the receptacle and the contact probe is aligned and the tip contact portion of the center conductor of the contact probe is fitted into the pin insertion hole of the receptacle.
A cylindrical insulator that covers the center conductor so as to freely advance and retract within a central conductor advance / retreat hole, and a cylindrical shell that covers the insulator so as to freely advance and retract,
In order to move the relative position of the contact probe and the receptacle in order to align the axial centers of the contact probe and the receptacle by sliding the inclined wall portion of the mortar-shaped recess formed on the top surface of the receptacle to the tip of the insulator Forming an inverted conical protrusion of
A guide portion is formed at the front end portion of the shell so as to contact and guide the outer periphery of the receptacle and further expand to the outer peripheral edge side in order to make the axes of both coincide.

The contact probe according to claim 3 according to the present invention is the contact probe according to claim 2,
The receptacle has a circular housing and a shell on the outer periphery of the housing. The housing has a diameter d6, a mortar-shaped recess on the upper surface, a pin insertion hole having a diameter d2 in the center, and the mortar. The concave portion is composed of an inclined wall portion and a flat bottom portion in the center having a diameter d4 that is slightly larger than the pin insertion hole, and the calling protrusion of the contact probe is substantially the same as the central conductor advance / retreat hole having an inner diameter larger than d2 and smaller than d4. And the outer diameter d8 of the contact probe shell is d8 ≧ d4−d3 + d7 when the diameter of the shell of the housing of the receptacle is d7. It is characterized by setting.

The contact probe according to claim 4 according to the present invention is the contact probe according to claim 3,
The center conductor has a tip contact portion having a diameter d1 smaller than the diameter d3 of the pin insertion hole at the lower end portion, and a step portion larger than d2 and not more than d3 is formed on the tip contact portion.

The contact probe according to claim 5 according to the present invention is the contact probe according to claim 3,
The angle of the inverted conical calling protrusion is formed sharper than the inclined wall portion of the mortar-shaped recess.

According to invention of Claim 1,
In the method of aligning the axial center of the receptacle and the contact probe and fitting the tip contact portion of the center conductor of the contact probe into the pin insertion hole of the receptacle,
When the contact probe is pushed down in a state where the receptacle and the contact probe are misaligned, an inverted frustoconical calling protrusion at the tip of a cylindrical insulator provided on the outer periphery of the central conductor is provided on the outer periphery of the receptacle. Sliding while making contact with the inclined wall portion of the mortar-shaped recess, at least one of the receptacle and the contact probe is in a direction substantially orthogonal to the pressing direction of the contact probe, and the calling protrusion is the mortar-shaped Calling up to the bottom of the recess,
After completion of the pull-in, the cylindrical shell provided on the outer periphery of the receptacle is pushed down, and the guide portion provided at the tip of the shell and extending toward the outer peripheral edge is slid while being in contact with the outer peripheral edge of the receptacle shell. A step of bringing the guide portion into contact with the entire outer peripheral surface of the shell of the receptacle so that the axes of the guides coincide with each other;
The center conductor is pushed out with the shaft center aligned, and the tip contact portion of the center conductor descends through the pin insertion hole in the center of the receptacle, pushes down the movable terminal, releases the contact with the fixed terminal, and moves. And switching the signal path from the terminal to the central conductor, and thus has the following effects.

(1) Conventionally, the structure is such that only the guide surface 76 of the outer conductor 73 is pushed in and brought into contact with the shell 89 of the coaxial connector 80 with switch, but the inverted frustoconical shape is called at the tip of the cylindrical insulator. The first stage is called by the protrusion, and then the second stage is guided by the guide portion provided at the tip of the shell and extending to the outer peripheral edge side. Therefore, the outer diameter of the shell is reduced by the amount corresponding to the first stage. be able to. Incidentally, the shell of the present invention can be downsized to 40 to 50% in area ratio as compared with the outer diameter of the conventional shell.
(2) If the receptacle is downsized, the area occupied by the contact probe can be reduced accordingly.
(3) Even if both the shell of the receptacle and the cylindrical shell of the contact probe are made of metal, there is very little sliding due to the contact between the metals, so there is almost no wear and no metal powder is generated.

According to invention of Claim 2,
In the contact probe in which the axial center of the receptacle and the contact probe is aligned and the tip contact portion of the center conductor of the contact probe is fitted into the pin insertion hole of the receptacle.
A cylindrical insulator that covers the center conductor so as to freely advance and retract within a central conductor advance / retreat hole, and a cylindrical shell that covers the insulator so as to freely advance and retract,
In order to move the relative position of the contact probe and the receptacle in order to align the axial centers of the contact probe and the receptacle by sliding the inclined wall portion of the mortar-shaped recess formed on the top surface of the receptacle to the tip of the insulator Forming an inverted conical protrusion of
At the tip of the shell, a guide portion is formed which contacts and guides the outer periphery of the receptacle and further expands to the outer peripheral edge side so as to make the axes coincide with each other. Therefore, the outer diameter of the contact probe can be greatly reduced.

According to invention of Claim 3,
The receptacle has a circular housing and a shell on the outer periphery of the housing. The housing has a diameter d6, a mortar-shaped recess on the upper surface, a pin insertion hole having a diameter d2 in the center, and the mortar. The concave portion is composed of an inclined wall portion and a flat bottom portion in the center having a diameter d4 that is slightly larger than the pin insertion hole, and the calling protrusion of the contact probe is substantially the same as the central conductor advance / retreat hole having an inner diameter larger than d2 and smaller than d4. And the outer diameter d8 of the contact probe shell is d8 ≧ d4−d3 + d7 when the diameter of the shell of the housing of the receptacle is d7. Since it is set, the outer diameter of the contact probe can be reduced by d6-d4. Moreover, since the mortar-shaped recessed part consists of a slope wall part and the center flat bottom part of a diameter a little larger than a pin insertion hole, a 1st step calling can be performed on a slope wall part, and it can guide on a flat bottom part.

According to invention of Claim 4,
The center conductor has a tip contact portion having a diameter d1 smaller than the diameter d3 of the pin insertion hole at the lower end portion, and a step portion larger than d2 and less than or equal to d3 is formed above the tip contact portion. It is possible to prevent the portion from being pushed more than necessary.

According to invention of Claim 5,
Since the angle of the inverted conical calling protrusion is formed sharper than the slope wall portion of the mortar-shaped recess, the calling action can be performed smoothly.

The present invention
In the method of aligning the axial center of the receptacle and the contact probe and fitting the tip contact portion of the center conductor of the contact probe into the pin insertion hole of the receptacle,
When the contact probe is pushed down in a state where the receptacle and the contact probe are misaligned, an inverted frustoconical calling protrusion at the tip of a cylindrical insulator provided on the outer periphery of the central conductor is provided on the outer periphery of the receptacle. Sliding while making contact with the inclined wall portion of the mortar-shaped recess, at least one of the receptacle and the contact probe is in a direction substantially orthogonal to the pressing direction of the contact probe, and the calling protrusion is the mortar-shaped Calling up to the bottom of the recess,
After completion of the pull-in, the cylindrical shell provided on the outer periphery of the receptacle is pushed down, and the guide portion provided at the tip of the shell and extending toward the outer peripheral edge is slid while being in contact with the outer peripheral edge of the receptacle shell. A step of bringing the guide portion into contact with the entire outer peripheral surface of the shell of the receptacle so that the axes of the guides coincide with each other;
The center conductor is pushed out with the shaft center aligned, and the tip contact portion of the center conductor descends through the pin insertion hole in the center of the receptacle, pushes down the movable terminal, releases the contact with the fixed terminal, and moves. And switching the signal path from the terminal to the central conductor.

In the contact probe in which the axial center of the receptacle and the contact probe is aligned and the tip contact portion of the center conductor of the contact probe is fitted into the pin insertion hole of the receptacle.
The contact probe according to the present invention comprises:
A cylindrical insulator that covers the center conductor so as to freely advance and retract within a central conductor advance / retreat hole, and a cylindrical shell that covers the insulator so as to freely advance and retract,
In order to move the relative position of the contact probe and the receptacle in order to align the axial centers of the contact probe and the receptacle by sliding the inclined wall portion of the mortar-shaped recess formed on the top surface of the receptacle to the tip of the insulator Forming an inverted conical protrusion of
A contact probe characterized in that, at the tip of the shell, a guide portion is formed which extends to the outer peripheral edge side so as to contact and guide the outer periphery of the receptacle and to align the axial centers of the receptacles.

  The receptacle has a circular housing and a shell on the outer periphery of the housing. The housing has a diameter d6, a mortar-shaped recess on the upper surface, a pin insertion hole having a diameter d2 in the center, and the mortar. The concave portion is composed of an inclined wall portion and a flat bottom portion in the center having a diameter d4 that is slightly larger than the pin insertion hole, and the calling protrusion of the contact probe is substantially the same as the central conductor advance / retreat hole having an inner diameter larger than d2 and smaller than d4. And the outer diameter d8 of the contact probe shell is d8 ≧ d4−d3 + d7 when the diameter of the shell of the housing of the receptacle is d7. Set.

  The center conductor has a tip contact portion having a diameter d1 smaller than the diameter d3 of the pin insertion hole at the lower end portion, and a step portion larger than d2 and less than or equal to d3 is formed above the tip contact portion.

  The angle of the inverted conical calling protrusion is formed sharper than the slope wall of the mortar-shaped recess.

A first embodiment of the present invention will be described with reference to FIGS.
FIG. 2 is a cross-sectional view of Embodiment 1 of the contact probe 11 according to the present invention. In FIG. 2, the contact probe 11 includes an inspection machine connecting part 13 whose upper part is connected to a cable of the inspection machine, and a connector connecting part 14 provided on the lower side of the inspection machine connecting part 13.
In the inspection machine connecting portion 13, a center conductor 17 is provided inside an outer conductor 15 via an insulating cylinder portion 16.
The connector connecting portion 14 is provided with an outer conductor housing 23 on the lower surface of the flange of the outer conductor 15, and an inner cylinder 35 is provided inside the outer conductor housing 23 with a floating coil spring 24 interposed therebetween. Yes. An upper insulator 18 and a washer 19 are provided on the lower side of the insulating cylinder portion 16, and a shell 26 is fitted between the upper insulator 18 and the inner cylinder 35, and between the shell 26 and the washer 19. A shell coil spring 21 is interposed. A cylindrical body 27 is fitted inside the shell 26, and an insulator moving spring 25 is interposed between the cylindrical body 27 and the upper insulator 18. A lower insulator 29 is provided in the advance / retreat hole 28 in the cylindrical body 27, and a center conductor 22 is provided in the lower insulator 29 so as to be able to advance and retract, and between the center conductor 22 and the center conductor 17. A central conductor coil spring 20 is interposed.

  The characteristic configuration of the present invention is shown in the enlarged view shown in FIG. This characteristic portion is such that the center conductor 22 is fitted in a central conductor advance / retreat hole 34 at the center of the lower insulator 29 so that the center conductor 22 can advance and retreat, and the lower insulator 29 forms an inverted truncated cone-shaped inclined portion 32 having a sharp tip. The outer peripheral edge portion of the central conductor advance / retreat hole 34 at the tip of the inclined portion 32 constitutes a calling protrusion 33. The lower surface of the shell 26 fitted to the outer periphery of the lower insulator 29 forms a guide portion 31 composed of a concave portion inclined in a mortar shape inward. The inclined portion 32 is for constituting the calling projection 33, and the inclination angle only needs to be larger than the inclination angle of the mortar-shaped recess 69 of the coaxial connector 9 with a switch to be described later. Any shape such as a straight line or a curved line may be used.

In FIG. 1, reference numeral 11 denotes a contact probe according to the present invention described above, and 9 denotes a coaxial connector 9 with a switch of a device under test as a receptacle. Reference numeral 72 denotes the conventional contact probe shown in FIG. 5 for comparison.
The details of the coaxial connector 9 with a switch as the receptacle are shown in FIG. In FIG. 4, the coaxial connector 9 with a switch has a flat cylindrical shape on the upper half, a mortar shape on the upper surface, and a flat rectangular shape on the lower half so that the overall height is as low as possible. A housing 40 made of an insulating material such as a plastic material, a shell 41 formed by drawing a conductive metal plate, and at least two terminals by pressing a conductive metal plate, specifically, fixed The terminal 42 and the movable terminal 43 are configured.

  The housing 40 has a cylindrical portion 44 with a short upper half, a mortar-shaped recess 69 on the upper surface, and terminal support protrusions 46a and 46b whose lower half slightly protrudes to the left and right, and a non-rotating protrusion that slightly protrudes forward and backward. 47a and 47b form a short square. The mortar-shaped recess 69 is composed of an inclined wall portion 69a inclined toward the center and a flat bottom portion 69b at the center, and a pin insertion hole 45 is formed through the central portion of the flat bottom portion 69b. As described above, the inclination angle of the inclined portion 32 of the contact probe 11 is formed larger than the inclination angle of the inclined wall portion 69a, and the incoming projection 33 slides while making point or line contact with the inclined wall portion 69a. It is configured to do.

A movable gap 67 that is sufficiently larger than the pin insertion hole 45 is formed in communication with the lower portion of the pin insertion hole 45, and a contact piece insertion groove 50 is formed so as to penetrate from the movable gap 67 to the side.
A vertical terminal press-fit groove 48 for press-fitting the fixed terminal 42 is formed in the one terminal support protrusion 46 a so as to communicate with the working gap 67. Further, a vertical terminal press-fit groove 49 for press-fitting the movable terminal 43 is formed in the other terminal support protrusion 46b so as to communicate with the movable gap 67, and the terminal press-fit groove 49 is formed on the right side of FIG. The contact piece insertion groove 50 communicates, and a protrusion insertion groove 49a is formed halfway on the left side of FIG.

  The shell 41 has a cylindrical shape in which a housing fitting hole 51 is formed so that the upper half of the shell 41 covers the cylindrical portion 44 of the housing 40 from above, and a locking groove 55 is formed on the entire outer periphery. In the lower half of the shell 41, side walls 71 and ground terminal portions 56 are formed outwardly on both sides in an L-shape, and these side walls 71 are connected to the locking portions 52 of the housing 40. A locking groove 53 for locking is formed. After the ground terminal portion 56 is assembled to the housing 40, the ground terminal portion 56 is bent toward the lower surface notch portion 70 of the housing 40 as shown by a chain line in FIG.

As shown in FIG. 4, the fixed terminal 42 has a vertical press-fit portion 59 that is press-fitted into the terminal press-fit groove 48, and the lower surface of the tip that rises in a crank shape from the press-fit portion 59 is in contact with the movable terminal 43. A contact piece 57 to be separated is formed, and a base end lower surface portion of the press-fitting portion 59 constitutes a connection terminal portion 58. Reference numeral 59a denotes a press-fit protrusion that is press-fitted and fixed in a not-shown protrusion insertion groove.
As shown in FIG. 4, the movable terminal 43 has a vertical press-fit portion 60 that is press-fitted into the terminal press-fit groove 49, and rises from the midway of the press-fit portion 60 to bend to form a spring portion 61. The horizontal portion of the distal end portion of the spring portion 61 is a pressing portion 68, a part of the distal end of the pressing portion 68 is a contact piece 62, and the base end portion of the press-fit portion 60 constitutes a connection terminal portion 63. Yes. Reference numeral 60a denotes a press-fit protrusion that is press-fitted and fixed in the protrusion insertion groove 49a.

The assembly of the components of the coaxial connector with switch 9 configured as described above will be described.
As shown in FIG. 4, when the press-fit portion 59 of one fixed terminal 42 is press-fitted into the terminal press-fit groove 48 of the housing 40, the contact piece 57 of the fixed terminal 42 enters the movable gap portion 67 and the connection terminal portion. 58 is made to face the lower surface of the housing 40, and the press-fit protrusion 59a is press-fitted into the protrusion insertion groove and fixedly attached.
When the press-fitting part 60 of the other movable terminal 43 is press-fitted into the terminal press-fitting groove 49 of the housing 40, the spring part 61, the pressing part 68, and the contact piece 62 of the movable terminal 43 form the contact piece insertion groove 50 as shown in FIG. And the pressing portion 68 faces the pin insertion hole 45, the contact piece 62 contacts the contact piece 57 of the fixed terminal 42 from the lower surface, and the connection terminal portion. 63 is made to face the lower surface of the housing 40, and the press-fitting protrusion 60a is press-fitted into the protrusion insertion groove 49a and fixedly attached.

Next, the cylindrical portion 44 of the housing 40 is fitted into the housing fitting hole 51 of the shell 41 from above, and the rotation prevention projection 47 of the housing 40 is fitted to the side wall of the rotation prevention groove 53 of the shell 41. After the fitting, when the ground terminal portions 56, 56 protruding from the side wall portions 71, 71 on both sides are folded inward, the ground terminal portions 56, 56 are folded and locked to the lower surfaces of the terminal support protrusions 46a, 46b, respectively. Is done.

  As shown in FIG. 3, the assembled coaxial connector with switch 9 has the connection terminal portion 58, the connection terminal portion 63, and the ground terminal portion 56 placed on the printed wiring pattern portion of the printed circuit board and electrically connected with solder or the like. At the same time, it is mechanically fixed.

Here, the size (inner diameter and outer diameter) of each part where the contact probe 11 and the coaxial connector with switch 9 are fitted is set as follows.
The diameter d1 of the tip contact portion 30 at the tip of the center conductor 22 <the diameter d2 of the pin insertion hole 45 <the outer diameter of the step portion 30a slightly above the tip contact portion 30 of the center conductor 22 (the inner diameter of the center conductor advance / retreat hole 34) d3. <Outer diameter d4 of the flat bottom portion 69b <Outer diameter d5 of the lower insulator 29 <Outer diameter d6 of the housing 40 <Outer diameter d7 of the shell 41 <Outer diameter d8 of the shell 26)

Next, a method of fitting the contact probe 11 and the coaxial connector 9 with a switch by correcting the position (axial center) by calling and guiding will be described with reference to FIG.
(1) FIG. 3A: A distance x0 between the axis L1 of the contact probe 11 and the axis L2 of the coaxial connector 9 with a switch, that is, {(d4-d3) / 2 ≦ x0 ≦ (d6-d3) / 2} It is assumed that there has been a position shift. The maximum value of the initial positional deviation is represented by x0 = (d6−d3) / 2. When the contact probe 11 is pushed down in this state, the calling projection 33 of the lower insulator 29 comes into contact with the inclined wall portion 69a, and the coaxial connector 9 with a switch is called by the calling projection 33 (move to the left in the figure).
(2) FIG. 3B: When the calling projection 33 reaches the flat bottom 69b, the calling of the coaxial connector with switch 9 is terminated. At this time, the positional deviation distance x1 = (d4−d3) / 2 between the axial centers L1 and L2.
(3) FIG. 3C: When the shell 26 of the contact probe 11 is pushed down after the coaxial connector 9 with a switch is finished, the guide portion 31 closest to L2 comes into contact with the outer peripheral edge portion of the shell 41. In addition, by forming an inclined surface having substantially the same inclination angle as that of the guide portion 31 on the upper outer peripheral edge of the shell 41, the sliding of both of them becomes smooth.
(4) FIG. 3D: When the shell 26 is further pushed in while the guide portion 31 is in contact with the shell 41, the coaxial connector 9 with a switch is located on the left side in the drawing while the calling projection 33 is guided on the flat bottom 69b. When the guide part 31 comes into contact with the entire outer peripheral surface of the shell 41, the movement of the switch-equipped coaxial connector 9 stops. At this time, the axial centers L1 and L2 coincide.
(5) FIG. 3 (e): When the center conductor 22 is pushed out with the axial centers L1 and L2 being coincident, the tip contact portion 30 is lowered through the pin insertion hole 45, and the pressing portion 68 of the movable terminal 43 is pushed down. The contact piece 57 of the fixed terminal 42 and the contact piece 62 of the movable terminal 43 are opened, and the signal path from the fixed terminal 42 to the movable terminal 43 is switched to the signal path from the movable terminal 43 to the central conductor 22 and inspected. At this time, the stepped portion 30a of the center conductor 22 abuts against the flat bottom portion 69b, and the tip contact portion 30 is prevented from dropping more than necessary.

FIG. 1 compares the sizes of the contact probe 11 according to the present invention and the conventional contact probe 72. The outer diameter d8 of the shell 26 according to the present invention is d8 ≧ {(d4−d3) / 2 + d7 / 2} ×. 2, i.e., the positional deviation distance x1 = (d4−d3) / 2 after calling is larger than the outer diameter d7 of the shell 41, and therefore d8 ≧ d4−d3 + d7.
On the other hand, since the outer diameter d9 of the outer conductor 73 of the conventional contact probe 72 does not have a calling action, d9 ≧ {(d6−d3) / 2 + d7 / 2} × 2, that is, the maximum initial displacement. Since the value x = (d6-d3) / 2 is effective as it is, it must be d9 ≧ d6-d3 + d7.
This means that the size of the contact probe 11 according to the present invention and the conventional contact probe 72 is expressed as a difference between d4 and d6, and is downsized.

It is sectional drawing explaining the effect | action which the contact probe 11 by this invention and the conventional contact probe 72 fit with the coaxial connector 9 with a switch as a receptacle. (A) is the longitudinal cross-sectional view of the whole contact probe 11 by this invention, (b) is sectional drawing of the principal part of the front-end | tip of the contact probe 11 in (a). (A) (b) (c) (d) (e) is a longitudinal cross-sectional view explaining the fitting operation | movement with the coaxial connector 9 with a switch as a receptacle by the contact probe 11 of this invention. It is a disassembled perspective view of the coaxial connector 9 with a switch. It is a longitudinal cross-sectional view explaining the fitting effect | action with the coaxial connector 80 with a switch by the conventional contact probe 72. FIG.

DESCRIPTION OF SYMBOLS 9 ... Coaxial connector with a switch as a receptacle, 11 ... Contact probe, 12 ... Printed circuit board, 13 ... Inspection machine connection part, 14 ... Connector connection part, 15 ... External conductor, 16 ... Movable terminal, 17 ... Center conductor, 18 ... Upper insulator, 19 ... Washer, 20 ... Coil spring for central conductor, 21 ... Coil spring for shell, 22 ... Central conductor, 23 ... External conductor housing, 24 ... Coil spring for floating, 25 ... Spring for moving insulator, 26 ... Shell 27 ... cylindrical body, 28 ... advancement / retraction hole, 29 ... lower insulator, 30 ... tip contact part, 30a ... step part, 31 ... guide part, 32 ... inclined part, 33 ... calling protrusion, 34 ... center conductor advance / retreat hole, 35 ... Inner cylinder, 40 ... Housing, 41 ... Shell, 42 ... Fixed terminal, 43 ... Movable terminal, 44 ... Cylindrical part, 45 ... Pin difference 46a, 46b ... terminal support protrusion, 47a, 47b ... non-rotating protrusion, 48 ... terminal press-fitting groove, 49 ... terminal press-fitting groove, 49a ... protrusion insertion groove, 50 ... contact piece insertion groove, 51 ... housing Fitting hole, 52 ... locking part, 53 ... locking groove, 55 ... locking groove, 56 ... ground terminal part, 57 ... contact piece, 58 ... connection terminal part, 59 ... press-fitting part, 59a ... press-fitting protrusion, DESCRIPTION OF SYMBOLS 60 ... Press-fit part, 60a ... Press-fit protrusion, 61 ... Spring part, 62 ... Contact piece, 63 ... Connection terminal part, 67 ... Movable space | gap part, 68 ... Press part, 69 ... Mortar-shaped recessed part, 69a ... Slope wall part, 69b: Flat bottom, 70: Notch on the lower surface, 71: Side wall, 72 ... Contact probe, 73 ... External conductor, 74 ... Center conductor, 75 ... Tip surface, 76 ... Guide surface, 77 ... Contact surface, 78 ... Print Substrate, 79 ... pattern electrode, 80 ... coaxial with switch Nectar, 81 ... first housing, 82 ... pin insertion hole, 83 ... fixed terminal, 84 ... fixed contact portion, 85 ... movable terminal, 86 ... second housing, 87 ... contact portion, 88 ... movable contact portion, 89 ... shell , 90 ... mortar-shaped recess.

Claims (5)

In the method of aligning the axial center of the receptacle and the contact probe and fitting the tip contact portion of the center conductor of the contact probe into the pin insertion hole of the receptacle,
When the contact probe is pushed down in a state where the receptacle and the contact probe are misaligned, an inverted frustoconical calling protrusion at the tip of a cylindrical insulator provided on the outer periphery of the central conductor is provided on the outer periphery of the receptacle. Sliding while making contact with the inclined wall portion of the mortar-shaped recess, at least one of the receptacle and the contact probe is in a direction substantially orthogonal to the pressing direction of the contact probe, and the calling protrusion is the mortar-shaped Calling up to the bottom of the recess,
After completion of the pull-in, the cylindrical shell provided on the outer periphery of the receptacle is pushed down, and the guide portion provided at the tip of the shell and extending toward the outer peripheral edge is slid while being in contact with the outer peripheral edge of the receptacle shell. A step of bringing the guide portion into contact with the entire outer peripheral surface of the shell of the receptacle so that the axes of the guides coincide with each other;
The center conductor is pushed out with the shaft center aligned, and the tip contact portion of the center conductor descends through the pin insertion hole in the center of the receptacle, pushes down the movable terminal, releases the contact with the fixed terminal, and moves. A method for fitting a receptacle and a contact probe, comprising: switching a signal path from a terminal to a central conductor. In the contact probe in which the axial center of the receptacle and the contact probe is aligned and the tip contact portion of the center conductor of the contact probe is fitted into the pin insertion hole of the receptacle.
A cylindrical insulator that covers the center conductor so as to freely advance and retract within a central conductor advance / retreat hole, and a cylindrical shell that covers the insulator so as to freely advance and retract,
In order to move the relative position of the contact probe and the receptacle in order to align the axial centers of the contact probe and the receptacle by sliding the inclined wall portion of the mortar-shaped recess formed on the top surface of the receptacle to the tip of the insulator Forming an inverted conical protrusion of
A contact probe characterized in that, at the tip of the shell, a guide portion is formed which extends to the outer peripheral edge side so as to contact and guide the outer periphery of the receptacle and to align the axial centers of the receptacles.   The receptacle has a circular housing and a shell on the outer periphery of the housing. The housing has a diameter d6, a mortar-shaped recess on the upper surface, a pin insertion hole having a diameter d2 in the center, and the mortar. The concave portion is composed of an inclined wall portion and a flat bottom portion in the center having a diameter d4 that is slightly larger than the pin insertion hole, and the calling protrusion of the contact probe is substantially the same as the central conductor advance / retreat hole having an inner diameter larger than d2 and smaller than d4. And the outer diameter d8 of the contact probe shell is d8 ≧ d4−d3 + d7 when the diameter of the shell of the housing of the receptacle is d7. The contact probe according to claim 2, wherein the contact probe is set.   The center conductor has a tip contact portion having a diameter d1 smaller than a diameter d3 of a pin insertion hole at a lower end portion, and a step portion larger than d2 and not more than d3 is formed at an upper portion of the tip contact portion. 3. The contact probe according to 3.   4. The contact probe according to claim 3, wherein the angle of the inverted conical calling protrusion is formed sharper than the inclined wall portion of the mortar-shaped recess.

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