CN113495174A - Contact pin and socket - Google Patents
Contact pin and socket Download PDFInfo
- Publication number
- CN113495174A CN113495174A CN202110291848.4A CN202110291848A CN113495174A CN 113495174 A CN113495174 A CN 113495174A CN 202110291848 A CN202110291848 A CN 202110291848A CN 113495174 A CN113495174 A CN 113495174A
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- CN
- China
- Prior art keywords
- contact
- end portion
- needle
- engagement end
- body member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06733—Geometry aspects
- G01R1/06738—Geometry aspects related to tip portion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06716—Elastic
- G01R1/06722—Spring-loaded
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06733—Geometry aspects
- G01R1/0675—Needle-like
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/073—Multiple probes
- G01R1/07307—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card
- G01R1/07314—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card the body of the probe being perpendicular to test object, e.g. bed of nails or probe with bump contacts on a rigid support
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2886—Features relating to contacting the IC under test, e.g. probe heads; chucks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Leads Or Probes (AREA)
- Connecting Device With Holders (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
A contact pin and a socket, the contact pin comprising: a first needle including a first hollow portion extending from the first contact end portion to the first engagement end portion in the axial direction and open on the first engagement end portion side; a second needle including a second hollow portion extending from the second contact end portion to the second engagement end portion in the axial direction and open on the second engagement end portion side, the second engagement end portion and the first engagement end portion being slidably engaged with each other in a state where the second hollow portion and the first hollow portion are communicated; and a biasing member disposed in a space formed by the first hollow portion and the second hollow portion and configured to bias the first needle and the second needle to extend in the axial direction, the first needle including: a cylindrical main body member that is open on a first engagement end side and a first contact end side; and a contact member that is provided so as to close the open portion of the main body member on the first contact end side, that constitutes the first contact end, and that has a higher hardness than the main body member and the second needle.
Description
Technical Field
The present invention relates to a contact pin and a socket used for electrical connection of an electrical component such as an IC (Integrated Circuit) package in a performance test or the like of the electrical component.
Background
In the inspection of electrical components such as IC packages, sockets in which a plurality of probes are arranged are used. The socket is configured to be disposed on an inspection substrate, which is a substrate on the inspection apparatus side, and to accommodate an IC package, which is an inspection target. The socket electrically connects the terminals of the accommodated IC package and the terminals of the inspection substrate via the probes as the contact pins to perform a test such as a conduction test, thereby inspecting the performance of the IC package.
As a conventional probe, for example, a probe having a structure shown in patent document 1 is known. The probe includes: a lower contact member having a hollow shape with an open lower end, the lower contact member contacting a terminal of the inspection substrate; an upper contact member having a lower end portion fitted to an upper end portion of the lower contact member so as to be slidable in the vertical direction, the upper contact member having an upper end portion contacting a terminal of the IC package; and a spring disposed inside the upper contact member and the lower contact member and biasing the upper contact member and the lower contact member in a direction in which both extend. Since the probe has a structure in which springs are accommodated in hollow portions of the upper contact member and the lower contact member, the overall length of the probe is shortened as compared with a structure in which two contact pins that move forward and backward at both ends of a tubular needle tube are urged by springs in the needle tube, and the probe is suitable as a signal pin for high-frequency signal transmission, for example, and has a low on-resistance.
Since the IC package is accommodated in the socket disposed on the inspection board, when the upper contact member of the probe pin is pressed downward by being brought into contact with the terminal (for example, solder ball) of the electric component, the lower contact member presses the terminal of the inspection board downward by the spring to secure the contact.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-213010
Disclosure of Invention
Problems to be solved by the invention
However, in the probe pin having a structure in which the spring is accommodated in the space formed by the hollow portions of the upper contact member and the lower contact member, and the entire length of the pin can be shortened, it is desired to make the upper contact member in contact with the IC package harder, prevent abrasion due to inspection, and improve durability.
However, in the above-described structure, when the hollow portion for accommodating the spring is provided in the upper contact member, the upper contact member having high hardness is subjected to the hollow processing using a cutter such as a drill. Thus, there are problems as follows: during machining, the cutting tool side is worn out, and sufficient hollowing of the upper contact member cannot be performed, and therefore, the spring cannot be appropriately housed, the yield is lowered, and a product with stable quality cannot be manufactured.
The present invention has been made in view of such circumstances, and an object thereof is to provide a contact pin and a receptacle that can shorten the entire length of the pin and can achieve both durability and mass productivity.
Means for solving the problems
The contact pin of the present invention is a contact pin for electrically connecting a first electrical component and a second electrical component, and includes:
a first needle including a first hollow portion extending from a first contact end portion, which is in contact with the first electrical component when in use, to a first engagement end portion along an axial direction, and being open on a side of the first engagement end portion;
a second needle including a second hollow portion extending from a second contact end portion, which is in contact with the second electrical component when in use, to a second engagement end portion along the axial direction, and being open on the second engagement end portion side, the second engagement end portion and the first engagement end portion being slidably engaged with each other in a state where the second hollow portion and the first hollow portion are communicated; and
a biasing member disposed in a space formed by the first hollow portion and the second hollow portion and configured to bias the first needle and the second needle to extend in the axial direction,
the first needle further comprises:
a cylindrical main body member that is open on the first engagement end portion side and the first contact end portion side; and
and a contact member that is provided so as to close the open portion of the main body member on the first contact end side, that constitutes the first contact end, and that has a higher hardness than the main body member and the second needle.
The socket of the present invention adopts a structure including:
the contact pin of the above structure; and
and a support body for supporting the contact pins.
Effects of the invention
According to the present invention, the entire length of the needle can be shortened, and durability and mass productivity can be both achieved.
Drawings
Fig. 1 is an external perspective view of a contact pin according to an embodiment of the present invention.
Fig. 2 is a longitudinal sectional view showing the structure of a main part of a contact pin according to an embodiment of the present invention.
Fig. 3 is a plan view of the socket with the contact pins mounted thereon.
Fig. 4 is a partially sectional view of a-a line of fig. 3.
Fig. 5A, 5B, and 5C are diagrams illustrating the operation of the contact pin.
Fig. 6 is a partial cross-sectional view of the first needle showing a fixed state of the first contact member.
Fig. 7 is a partial cross-sectional view showing the first needle tip in a state where the first contact member is in contact with the tapered portion of the cylindrical body from the lower end portion side.
Fig. 8 is a view for explaining the positioning protrusion.
Fig. 9 is a view showing an example of the first contact member before being attached to the first needle.
Fig. 10 is a view showing an example of the first contact member without the positioning protrusion.
Description of the reference numerals
2 socket main body (support)
3 through hole
3a upper side hole part
3b flange hole part
3c lower side hole part
5 Wiring board
6 tin ball
7 working table
10 socket
71 hole part
72 working table
100 contact pin
110 first needle
120. 120A first contact member
122 first contact end
124 base part
124a outer peripheral portion
124b contact portion side tapered portion
124c engaging end side tapered portion
126 positioning protrusion
130 main body component
131 lower end (the other end)
132 upper end portion
133 first hollow part
134 outer wall portion
135 first engaging end
136 flange portion
137 taper part
142 movement restricting part
144 marking part
150 second needle
152 second contact end portion
153 second hollow part
153a bottom
154 body portion
155 second engaging end portion
170 spring (force applying component)
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present specification, for convenience, the description will be made assuming that the center axis of the contact pin is vertical, the first needle is disposed on the upper side, and the second needle is disposed on the lower side. However, the arrangement of the contact pins and the socket including the contact pins is not limited to this.
< integral Structure of contact pin >
Fig. 1 is an external perspective view of a contact pin 100 according to an embodiment of the present invention in a non-use state, and fig. 2 is a longitudinal sectional view illustrating a structure of a main part of the contact pin.
The contact pin 100 shown in fig. 1 and 2 electrically connects the first electrical component and the second electrical component.
The contact pin 100 includes a first pin 110 contacting the first electrical component, a second pin 150 contacting the second contact component, and a spring 170. The first needle 110, the second needle 150 and the spring 170 are made of metal material.
The contact pin 100 is a contact pin called a "capsule contact pin" and includes a spring that biases both the first needle 110 and the second needle 150 in an extending direction in a space in which hollow interiors of the first needle 110 and the second needle 150 slidably provided along a direction of a central axis communicate with each other.
The first needle 110 is disposed on the upper side (one end side) of the contact pin 100, and the second needle 150 is disposed on the lower side (the other end side) of the contact pin 100.
The contact pin 100 may be any contact pin that is in contact with the first electrical component and the second contact component, respectively, and electrically connects the first electrical component and the second contact component to each other, and any electronic components may be connected to each other.
In the present embodiment, the contact pin 100 is used as a probe pin for an IC socket for inspection that inspects electrical characteristics of an IC package as the first electrical component. In this inspection, various tests such as an overload (burn-in) test are performed on the first electrical component to be inspected. For example, it is checked whether or not the electrical component is operating properly in the same environment as the actual usage environment of the electrical component or in an environment in which a load greater than the actual environment is applied.
Fig. 3 is a plan view of a socket with contact pins mounted thereon, and fig. 4 is a partial sectional view of a-a line of fig. 3. The contact pins shown in fig. 3 and 4 are schematically illustrated.
< socket 10 >
The socket 10 shown in fig. 3 and 4 is disposed on a wiring board as a second electrical component, and accommodates an IC package as a first electrical component in an upper portion thereof.
The socket 10 includes a plurality of contact pins 100 and a plate-like socket main body (support body) 2 supporting the contact pins 100.
The socket body 2 is disposed on the wiring board, and through holes 3 formed in the socket body 2 are formed so as to penetrate in the vertical direction in accordance with the number of terminals of the IC package to be tested. In each of these through holes 3, a contact pin 100 is disposed.
Fig. 5A, 5B, and 5C are cross-sectional views for explaining the operation of the contact pins in the socket, and fig. 5A is a view showing the contact pins to which no load is applied to the socket. Fig. 5B is a diagram showing a state in which the socket 10 is disposed on the wiring substrate 5, and fig. 5C is a diagram showing a state in which the IC package and the wiring substrate are connected.
As shown in fig. 5A, the through-hole 3 includes, in the thickness direction of the socket main body 2: an upper hole 3a provided at an upper side and through which the first needle 110 is inserted, a flange hole 3b provided at a central portion, and a lower hole 3c provided at a lower side and through which the second needle 150 is inserted. The upper hole portion 3a has a diameter through which the first needle 110 is inserted so as to be movable in the axial direction, and the lower hole portion 3c has a diameter through which the second needle 150 is inserted so as to be movable in the axial direction. The diameter of the flange hole 3b is larger than the diameters of the upper and lower holes 3a and 3c, and the diameter is such that the flange 136 of the first needle can be disposed so as to be movable in the axial direction.
The flange 136 of the contact pin 100 inserted into the through hole 3 is disposed in the central flange hole 3b, and thus, the movement in the vertical direction with respect to the socket main body 2 is restricted.
The contact pins 100 in the socket shown in fig. 5A are not in contact with the wiring substrate and the IC package, and therefore are in a fully extended maximum elongation state.
When the socket body 2 is mounted on the wiring substrate 5, the contact pins 100 are pressed upward by the wiring substrate 5. Thereby, the flange 136 moves upward and comes into contact with the edge of the upper hole 3a, and the movement of the first needle 110 upward is restricted. Thus, as shown in fig. 5B, the second needle 150 moves upward against the urging force of the spring 170. At this time, the second needle 150 and the wiring board 5 (specifically, for example, an electrode of the wiring board) are pressed against each other by the biasing force of the spring 170, and a reliable conduction state can be maintained.
Next, as shown in fig. 5C, when the solder ball 6 of the IC package as the first electrical component contacts the first needle 110, the first needle 110 moves downward so as to contract with respect to the second needle 150. Thus, the contact pin 100 can be reliably brought into contact with both the IC package and the wiring board in a state where both are pressed against each other.
The spring 170 may be not made of metal, as long as it has a biasing force in a direction in which both the first needle 110 and the second needle 150 are extended, that is, in a direction in which the end of the first needle 110 and the end of the second needle 150 are separated.
< first needle 110 >
As shown in fig. 2, the first needle 110 includes: the first contact member 120 provided on the upper end (one end) side, the tubular body member 130 having a hollow first hollow portion 133 with an open lower end (the other end) 131, and the first engagement end 135 provided on the lower end 131.
In the body member 130, the first hollow portion 133 is formed as follows: the first contact end 122, which is in contact with the first electrical component in use, extends toward the first engagement end 135 along the axial direction, and is open on the first engagement end 135 side.
The diameter of the first hollow portion 133 is formed larger than the outer diameter of the outer peripheral portion (outer periphery of the body portion 154) of the second needle 150. Thus, the second needle 150 is movable in the axial direction, i.e., in the up-down direction, in the first hollow portion 133 of the first needle 110.
The first hollow portion 133 communicates with a second hollow portion 153 of the second needle 150, which will be described later, and forms a space for accommodating the spring 170.
The body member 130 is cylindrical and includes a tapered portion 137 and a first engagement end portion 135 which are integrally provided. The body member 130 is formed by processing a metal cylinder (needle tube). The body member 130 is composed of a metal that is more flexible than the first contact member 120.
The body member 130 is formed of a metal material such as phosphor bronze or beryllium copper.
At the lower end 131 of the body member 130, a first engaging end 135 is provided in such a manner as to slidably engage with a second engaging end 155, whereby the second needle 150 is not dropped out from the state in which the first needle 110 has been inserted.
Specifically, the first engagement end 135 is a narrow portion having a shape in which a portion on the lower end side is narrowed at the lower end 131. The first engagement end 135 is provided so as to extend toward the inner peripheral side as it approaches the lower end. For example, the first engagement end 135 is formed by a process such as bending a part of the lower end 131 from the outside to the inside of the body member 130 in a state where the second engagement end 155 of the second needle 150 is positioned inside the body member 130.
By bending a part of the lower end portion 131 toward the inner diameter side, the first engagement end portion 135 engages with the second engagement end portion 155 when the second engagement end portion 155 moves toward the open portion side of the body member 130, and the movement of the second engagement end portion 155 is prevented.
At the upper end portion 132 of the body member 130, a tapered portion 137 inclined to the inner diameter side is provided.
The tapered portion 137 abuts against the first contact member 120 in a direction intersecting the axial direction of the body member 130, thereby fixing the first contact member 120 to the body member 130.
Fig. 6 is a partial cross-sectional view of the first needle showing a fixed state of the first contact member.
As shown in fig. 6, the inclination angle θ of the tapered portion 137 in the longitudinal section of the first contact member 120 is preferably equal to or greater than an angle (e.g., 90 °) formed by the contact side tapered portion 124b of the first contact member 120, centering on a point passing through the central axis of the first needle 110. By adjusting the inclination angle of the tapered portion 137 and the inclination angle of the contact portion side tapered portion 124b of the first contact member 120, the fixed state of the first contact member 120 with respect to the body member 130 can be adjusted. By this adjustment, the two can be brought into close contact with each other, and dust and residue from the first contact point member 120 side during use can be prevented from falling into the first needle 110.
The tapered portion 137 has elasticity, i.e., elasticity, and is in contact with the first contact member 120 at one end side, i.e., the upper side, and fixes the first contact member 120 in a state where the first contact member 120 is pressed from the upper side. The first contact member 120 may be fixed to the upper end of the body member 130 using the tapered portion 137 by welding, press-fitting, or the like. In the present embodiment, the first contact point member 120 is held by at least a part of the body member 130 in the circumferential direction. More specifically, for example, the fixing may be performed by press fastening such as press fastening.
The body member 130 may include a movement restricting portion 142 that protrudes from the inner circumferential surface toward the inner circumferential surface, for example. The movement restricting portion 142 abuts the first contact member 120 from the first engagement end 135 side, supports the first contact member 120, and restricts the movement of the first contact member 120 toward the first engagement end 135 side.
In the present embodiment, the movement restricting portion 142 is provided by deforming a part of the body member 130.
The movement restricting portion 142 holds the first contact member 120 in the axial direction together with the tapered portion 137 and firmly fixes it to the body member 130.
A scored portion 144 is provided on the outer peripheral surface of the body member 130. The score 144 secures the first contact member 120 to the upper end 132 of the body member 130.
For example, when a part of the body member 130 is pressed from the outside and deformed to form the movement restricting portion 142, the trace portion 144 is formed.
When the first contact member 120 is fixed to the main body member 130, as shown in fig. 7, the first contact member 120 is inserted from the opening on the lower end side into the main body member 130 such as a needle tube including the tapered portion 137 and not including the first engagement end 135. By this insertion, the first contact member 120 is pushed against the tapered portion 137 to be deformed, and is pushed against the tapered portion at a plurality of points so as to be in close contact with each other. Next, the body member 130 is subjected to press fastening to provide a mark portion 144 and a movement restricting portion 142 (see fig. 6). Thus, the first contact member 120 is inserted into the body member 130 from the lower end 131 side, and fixed so as to close the open portion on the upper end side of the body member 130.
Note that, instead of using the trace portion 144 and the movement restricting portion 142, as shown in fig. 7, the contact portion side tapered portion 124b of the first contact member 120 may be fixed by press fastening, welding, press fitting, or the like in a state of being in contact with the tapered portion 137.
The outer wall 134, which is an outer portion of the body member 130, has a flange 136 that protrudes by a predetermined amount in the radial direction.
As shown in fig. 5, the flange 136 abuts against the opening edge of the upper hole 3a and the opening edge of the lower hole 3c, thereby preventing movement in the vertical direction. The flange 136 is disposed in the flange hole 3b in the through hole 3 of the socket 10 so as to be movable in the axial direction.
< first contact member 120 >
The first contact member 120 constitutes a first contact end 122 which, in use, is in contact with a first electrical component, such as an IC package.
The first contact member 120 is provided so as to close the opening portion of the body member 130 on the first contact end portion 122 side.
The first contact member 120 has a higher hardness than the body member 130 and the second needle 150. As a result, even if the number of times of use is increased, the first contact member 120 is less likely to be worn, and the durability as the contact pin 100 can be improved.
For example, the first contact member 120 is preferably formed of a palladium alloy, in which case the body member 130 and the second needle 150 are formed of beryllium copper, phosphor bronze, brass, or the like.
The first contact member 120 includes a first contact end portion 122, a base portion 124 disposed in an upper end portion of the body member 130, and a positioning protrusion portion 126, and the first contact end portion 122 is protrudingly provided on the base portion 124.
The first contact end portion 122 is in contact with a terminal of an electrical component such as a solder ball 6 (see fig. 5C) of an IC package. In the present embodiment, the first contact end portion 122 is a contact end portion having a crown-shaped protrusion. Here, the first contact end portion 122 is configured as a crown-shaped contact end portion, but the first contact end portion 122 may have a shape corresponding to a terminal of an electrical component to be contacted. For example, the first contact end portion 122 may be formed in an R shape, a needle shape, a flat shape, an inverted truncated cone shape, a triangular pyramid shape, or the like.
The first contact end portion 122 is disposed so as to protrude from the opening surrounded by the tapered portion 137 in the first contact member 120 toward the upper side, i.e., the one end side.
The base 124 is disposed inside one end of the body member 130, i.e., inside the opening of the upper end 132, and is fixed to the upper end 132. The base 124 closes an opening on the upper end 132 side, which is one end of the body member 130.
The base 124 includes an outer peripheral portion 124a, and a contact portion side tapered portion 124b and an engagement end portion side tapered portion 124c provided on both sides in the axial direction with respect to the outer peripheral portion 124a, and the base 124 has a truncated cone shape.
The outer peripheral portion 124a is a portion having an outer diameter substantially equal to the inner diameter of the body member 130, and the outer peripheral portion 124a closes the open portion.
The contact portion side tapered portion 124b has an outer surface inclined so as to decrease in diameter as it approaches from the first engagement end portion 135 side toward the first contact end portion 122 side of the lower end portion 131.
The engagement end portion side tapered portion 124c is provided on the first engagement end portion 135 side with respect to the contact portion side tapered portion 124b, and has an outer surface inclined so as to decrease in diameter as it approaches from the first contact end portion side to the first engagement end portion.
The base 124 is fixed by pressure fastening in a state pressed by the tapered portion 137 of the body member 130, and is firmly fixed in a state sandwiched at least by the tapered portion 137 and the movement restricting portion 142.
The bottom surface of the base 124 is a surface that comes into contact with one end of a compression coil spring serving as an urging member, and a positioning protrusion 126 is provided at the center thereof so as to protrude from the first contact member 120 into the body member 130.
The positioning protrusion 126 positions the spring 170 in the contact pin 100, and the positioning protrusion 126 is inserted into one end of the spring 170.
Accordingly, even when the spring 170 is accidentally operated in the direction orthogonal to the axial direction, for example, when the second needle 150 is moved toward the first contact member 120 of the first needle 110 as shown in fig. 8, the positioning protrusion 126 restricts the lateral displacement of the spring 170, that is, the movement in the direction intersecting the axial direction. Thus, the spring 170 is not sandwiched between the first needle 110 and the second needle 150.
The length of the positioning protrusion 126 may be a length that can reach the hollow of the second needle when the first needle 110 and the second needle 150 are separated to the maximum extent in the axial direction, that is, when the first engagement end 135 is engaged with the second engagement end 155. With the positioning protrusion 126 having such a length, the lateral displacement of the spring 170 can be prevented in any state in which the first needle 110 and the second needle 150 are relatively moved in the axial direction.
Further, a positioning protrusion 126 is provided to protrude from the bottom surface of the base 124, which is a surface against which the end of the spring 170 abuts. As shown in fig. 9, holes 71 into which the positioning protrusions 126 are inserted are provided at predetermined intervals in the table 7 on which the first contact member 120 is placed. Thus, the positioning protrusion 126 can be inserted into the hole 71 in advance when the contact pin 100 is assembled. When the first contact point member 120 is mounted, the orientation of the first contact point member 120 can be easily made uniform to be an upright orientation. As a result, as compared with the case where the first contact members 120A without the positioning protrusions 126 are mounted as shown in fig. 10, they are more easily arranged in a uniform orientation on the table 72, and the mounting work of the first contact members 120 can be easily performed.
< second needle 150 >
The second needle 150 includes a second contact end portion 152 that contacts a second electrical component, such as a circuit board, in use, and is provided to be extendable and retractable in the axial direction with respect to the first needle 110.
The second needle 150 is formed of a metal material that is softer than the first contact member 120. For example, the metal material softer than the first contact member 120 is preferably a metal material that can be appropriately processed without causing wear on the cutting machine side and has a high yield when punching is performed using a cutting machine such as a drill.
For example, the second needle 150 is formed by processing a metal material such as beryllium copper, phosphor bronze, or brass. The second needle 150 made of such a metal material may be subjected to plating treatment with nickel, gold, or the like.
The second needle 150 includes: a second contact end portion 152, a body portion 154 including a second hollow portion 153, and a second engagement end portion 155. The second contact end portion 152, the body portion 154, and the second engagement end portion 155 are integrally provided.
The second contact end portion 152 is provided so as to protrude downward from the bottom surface of the body portion 154.
The second contact end 152 is disposed in such a manner that the center is located on the axis of the contact pin 100. The second contact end 152 may also be formed as follows: the area of the cross section orthogonal to the axis of the second contact end portion 152 decreases from the bottom surface of the body portion 154 toward the projecting direction. In the present embodiment, the second contact end portion 152 is formed in a hemispherical shape.
The body portion 154 is formed in a bottomed cylindrical shape, and has a second hollow portion 153 provided therein.
The body portion 154 is provided in the body member 130 of the first needle 110 so as to be movable in the axial direction.
At the end of the body 154 on the opening side, a second engagement end 155 is formed so as to protrude in the radial direction from the upper end of the body 154, and the second engagement end 155 is disposed in the body member 130 and slidably engaged with the first engagement end 135.
In the present embodiment, the second needle 150 is provided on the inner circumferential side of the first needle 110 so as to be movable in the axial direction, but the second needle 150 may be provided on the outer circumferential side of the first needle so as to be movable in the axial direction. In this configuration, the inner diameter of the body portion 154 of the second needle 150 is made larger than the outer diameter of the first needle 110, and a flange portion having the same function as the flange portion 136 provided on the outer periphery of the first needle 110 is provided on the outer periphery of the body portion 154. In this configuration, the second engagement end portion 155 is formed so as to protrude inward of the body portion 154, and the first engagement end portion 135 engages with the second engagement end portion 155 inward of the second engagement end portion 155.
The second hollow portion 153 communicates with the first hollow portion 133, and a spring 170 is disposed in a space formed by the communication.
The bottom 153a of the second hollow portion 153 is formed in a shape tapered toward the lower space. The other end of the spring 170 enters the bottom 153a, and the spring 170 is locked in a state of being less likely to be displaced.
< spring 170 >
The spring 170 is an example of a biasing member that biases the first needle 110 and the second needle 150 to extend in the axial direction.
The spring 170 is, for example, a compression coil spring.
The spring 170 is disposed in the space S formed by the first hollow portion 133 and the second hollow portion 153. The spring 170 is disposed in the space S in a preloaded state.
Specifically, the spring 170 is disposed so as to bias both the first needle 110 and the second needle 150 in a direction in which both are extended in a state in which the first needle 110 and the second needle 150 are maximally extended in the axial direction.
Specifically, the spring 170 presses the bottom surface of the base portion 124, which is the back surface of the first contact member 120, in a state of being externally fitted to the positioning protrusion 126 on the first needle 110 side, and presses the bottom portion 153a on the second needle 150 side.
According to the present embodiment, the first needle 110 includes: a cylindrical body member 130 that is open on the first engagement end 135 side and the first contact end 122 side; and a first contact member 120 which is provided so as to close the opening of the body member 130 on the side of the first contact end 122, constitutes the first contact end 122, and has a higher hardness than the body member 130 and the second needle 150.
Thus, since the first needle 110 including the first hollow portion 133 is constituted by the body member 130 and the first contact member 120, the first needle 110 can be formed without cutting or punching the first contact member 120 itself having a higher hardness than the body member 130 and the second needle 150. The contact pin 100 has a short overall length, and functions as a pin having a low on-resistance, which is suitable for use as a signal pin for high-frequency signal transmission, for example.
Thus, since the first needle 110 is not manufactured by performing the recess hole shape processing on the material having the higher hardness than the body member 130 and the second needle 150, the contact pin having a stable shape to which the preload is applied can be manufactured with a high yield.
As described above, according to the present embodiment, the entire length of the needle can be shortened, and durability and mass productivity can be both achieved.
When the first contact member 120 is fixed to the body member 130, the tapered portion 137 that abuts against the first contact member 120 is elastically deformed. This makes it possible to bring the contact portion side tapered portions 124b of the first contact member 120 into close contact at a plurality of points, thereby stabilizing the holding force of the first contact member 120 and stabilizing the contact with each other. Further, since the first contact member 120 is pressed and deformed in the axial direction against the tapered portion 137, and the first contact member 120 is brought into close contact with the tapered portion 137, the protruding length of the first contact end portion 122 protruding from the body member 130 can be changed.
The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the spirit thereof.
Industrial applicability
The present invention has the effect of shortening the overall length of the pin and of achieving both durability and mass productivity, and can be suitably used as a contact pin and a socket.
Claims (10)
1. A contact pin for electrically connecting a first electrical component and a second electrical component, comprising:
a first needle including a first hollow portion extending from a first contact end portion, which is in contact with the first electrical component when in use, to a first engagement end portion along an axial direction, and being open on a side of the first engagement end portion;
a second needle including a second hollow portion extending from a second contact end portion, which is in contact with the second electrical component when in use, to a second engagement end portion along the axial direction, and being open on the second engagement end portion side, the second engagement end portion and the first engagement end portion being slidably engaged with each other in a state where the second hollow portion and the first hollow portion are communicated; and
a biasing member disposed in a space formed by the first hollow portion and the second hollow portion and configured to bias the first needle and the second needle to extend in the axial direction,
the first needle further comprises:
a cylindrical main body member that is open on the first engagement end portion side and the first contact end portion side; and
and a contact member that is provided so as to close the open portion of the main body member on the first contact end side, that constitutes the first contact end, and that has a higher hardness than the main body member and the second needle.
2. The contact pin of claim 1,
the second engagement end portion is engaged with the first engagement end portion inside the first engagement end portion so that the second needle extends in the axial direction inside the first needle.
3. The contact pin of claim 1,
an end of the open portion on the first contact end side in the main body member includes a tapered portion inclined inward in a manner of reducing a diameter,
the contact member includes a contact portion side tapered portion inclined so as to decrease in diameter as approaching from the first engagement end portion side to the first contact portion side,
the contact member closes the opening portion in a state where the tapered portion abuts against the contact portion-side tapered portion.
4. The contact pin of claim 3,
the tapered portion of the body member has elasticity that urges the contact portion-side tapered portion of the contact member to come into close contact with the contact portion-side tapered portion.
5. The contact pin of claim 3,
the contact member further includes an engagement end portion side tapered portion that is provided at a position closer to the first engagement end portion side than the contact portion side tapered portion and that is inclined so as to decrease in diameter as approaching from the first contact end portion side to the first engagement end portion,
the contact member is held by at least a part of the main body member in the circumferential direction at the engagement end portion side tapered portion.
6. The contact pin of claim 5,
the body member includes a scored portion protruding inward in the radial direction and corresponding to a portion holding the engaging end side tapered portion.
7. The contact pin of any one of claims 1 to 6,
the urging member is a compression coil spring,
the contact point member includes a protrusion portion provided so as to protrude into the body member and inserted into one end portion of the compression coil spring to restrict lateral displacement of the compression coil spring.
8. The contact pin of claim 1,
the contact point member is inserted into the main body member from the first engagement end portion side, and is fixed at the first contact end portion side.
9. The contact pin of claim 1,
the contact member is composed of a palladium alloy.
10. A socket, comprising:
the contact pin of claim 1; and
and a support body for supporting the contact pins.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020049576A JP7444659B2 (en) | 2020-03-19 | 2020-03-19 | Contact pins and sockets |
| JP2020-049576 | 2020-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113495174A true CN113495174A (en) | 2021-10-12 |
Family
ID=77848469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110291848.4A Pending CN113495174A (en) | 2020-03-19 | 2021-03-18 | Contact pin and socket |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7444659B2 (en) |
| CN (1) | CN113495174A (en) |
| TW (1) | TW202201012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024034908A1 (en) * | 2022-08-10 | 2024-02-15 | (주)포인트엔지니어링 | Electro-conductive contact pin and testing device having same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004340867A (en) | 2003-05-19 | 2004-12-02 | Nec Electronics Corp | Spring probe and ic socket |
| JP5378273B2 (en) | 2010-03-12 | 2013-12-25 | 株式会社アドバンテスト | Contact probe and socket, method for manufacturing tubular plunger, and method for manufacturing contact probe |
| JP5861423B2 (en) | 2011-12-06 | 2016-02-16 | 山一電機株式会社 | Contact probe and socket for semiconductor device provided with the same |
| JP6881972B2 (en) | 2016-12-27 | 2021-06-02 | 株式会社エンプラス | Sockets for electrical contacts and electrical components |
-
2020
- 2020-03-19 JP JP2020049576A patent/JP7444659B2/en active Active
-
2021
- 2021-03-15 TW TW110109147A patent/TW202201012A/en unknown
- 2021-03-18 CN CN202110291848.4A patent/CN113495174A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024034908A1 (en) * | 2022-08-10 | 2024-02-15 | (주)포인트엔지니어링 | Electro-conductive contact pin and testing device having same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7444659B2 (en) | 2024-03-06 |
| TW202201012A (en) | 2022-01-01 |
| JP2021148642A (en) | 2021-09-27 |
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