TWI813241B - Probe contact - Google Patents

Abstract

Disclosed is a probe contact for electrical connection between a first terminal and a second terminal. The probe contact comprising a stationary plunger which comprises a first main body having a first end to come into contact with the first terminal, and a first protrusion protruding transversely to a longitudinal direction of the first main body, a plurality of movable plungers which comprises a second main body having a first end to come into contact with the second terminal and a second end being in electric contact with the stationary plunger, and a second protrusion protruding transversely to a longitudinal direction of the second main body, and are disposed to relatively slide independently of each other in the longitudinal direction of the second main body; and a spring which is provided between the first protrusion and the second protrusion.

Description

Probe contacts

The present disclosure relates to a probe contact used for testing the electrical characteristics of an object to be tested.

In order to test the electrical characteristics of the object to be tested, the probe contacts can electrically connect the first terminal of the test circuit board and the second terminal of the object to be tested.

Patent document 1 has disclosed a probe contact, which includes: a first plunger; a second plunger and a third plunger, which are disposed on both sides of the first plunger and capable of moving and sliding; a spring disposed between the first plunger and the second plunger and having a small diameter; and a second spring disposed between the first plunger and the third plunger and having a large diameter to accommodate the first spring .

[Patent document 1] Japanese Patent No. 5629611.

Since the first spring and the second spring allow the second plunger and the third plunger to operate independently, the probe contact disclosed in Patent Document 1 has the advantage of adaptively responding to various shapes of test terminals. However, due to The complex structure has the disadvantage of increasing manufacturing costs. In particular, probe contacts having such a structure have the following problem: it is difficult to make the probe contacts small enough to be applied to devices with fine pitch terminals. Test object.

One aspect of the present disclosure is to provide a probe contact that has a simple structure and can be manufactured very small.

According to various embodiments of the present disclosure, a probe contact is provided. The probe contact for electrically connecting the first terminal and the second terminal includes: a stationary plunger including a first body and a first protrusion, the first body having a third portion in contact with the first terminal. At one end, the first protrusion protrudes transversely to the longitudinal direction of the first body; a plurality of movable plungers includes a second body and a second protrusion, and the second body has a first protrusion in contact with the second terminal. end and a second end in electrical contact with the stationary plunger, the second protrusion protrudes transversely to the longitudinal direction of the second body, and the plurality of movable plungers are disposed on the second body. sliding relative to each other independently in the longitudinal direction; and a spring disposed between the first protrusion and the second protrusion.

Only the movable plunger that is pressed during the test can slide and move.

Each of the plurality of movable plungers may include a first coupling portion having a second end coupled to and slidably movable relative to the second end of the stationary plunger, the The stationary plunger may include a second coupling portion disposed at a second end of the stationary plunger and coupled to the first coupling portion, one of the first coupling portion and the second coupling portion disposed therebetween. At least one support protrusion may be included on the coupling surface, and the other one of the first coupling part and the second coupling part may include a support groove, so that the at least one support protrusion is detachably embedded in the support groove. .

The second protrusion can exert an unbalanced force on the end portion of the spring in the longitudinal direction with respect to the center of said spring during testing and can induce in the spring cause buckling deformation.

The shape of the second body may be plate-like, and the second protrusion may protrude from one side of the second body in a width direction.

The second protrusion of the movable plunger may be positioned symmetrically in the longitudinal direction about the center of the spring.

The second protrusions of the movable plunger may project in opposite directions to each other.

The shape of the second body may be plate-like, the second protrusions may include a pair of protrusions protruding from opposite sides of the second body in a width direction, and the pair of protrusions may be formed in a longitudinal direction. have different heights from each other.

The shape of the second body may be plate-like, and the second protrusion may protrude from one surface of the second body in a thickness direction.

The second protrusion may include an inclined surface that contacts an end portion of the spring.

The first body of the stationary plunger may include a guide rail with which the plurality of movable plungers are engaged, and the second body of the movable plunger may include a guide groove that is recessed in the longitudinal direction and Place on the guide rail.

The guide rail may include guide walls extending in a longitudinal direction on opposite sides of the guide rail and protruding in a thickness direction.

A test socket is provided that supports probe contacts having one of the above configurations.

1: Probe contact

2: Test the circuit board

3: Object to be tested

11:Static plunger

12, 42, 52, 62, 72, 82: movable plunger

12-1, 42-1, 52-1, 62-1, 72-1, 82-1: first movable plunger

12-2, 42-2, 52-2, 62-2, 72-2, 82-2: Second movable plunger

13:Spring

21:First terminal

31: Second terminal

32: Non-terminal part

111:First subject

112:The first protrusion

113: Stationary contact part

114: First coupling part

115:Open your mouth

116:Inner wall

121, 421, 521, 621, 721, 821: Second subject

122, 422, 522, 622-1, 622-2: Second protrusion

123:Activity Contact Department

124: Second coupling part

423, 523, 623-1, 623-2: The third protrusion

722, 822: First contact end part

723, 823: Second contact end part

1141:Guide rail

1141a: Fastening groove

1142:Guide wall

1241, 4241: Guide groove

1241a: Fastening protrusion

1242:Track supports

1244:hook

1246:Extended groove

7221, 8221: first tip

7222, 8222: Second tip

7223:First intermediate tip

7231, 8231: The third tip

7232, 8232: The fourth tip

7233:Second intermediate tip

A-A, B-B: line

P1, P2: points

The above and/or other aspects will become apparent and easier to understand by reading the following description of the embodiments in conjunction with the accompanying drawings, in which: FIG. 1 is a perspective view of a probe contact according to a first embodiment of the present disclosure. .

FIG. 2 is an exploded perspective view of the probe contact shown in FIG. 1 .

Figure 3 is a side view of the probe contact.

FIG. 4 is a cross-sectional view taken along lines A-A and B-B of FIG. 2 .

FIG. 5 is a cross-sectional view showing the independent sliding operation of the first movable plunger and the second movable plunger in FIG. 4 .

FIG. 6 is a cross-sectional view showing the simultaneous sliding operation of the first movable plunger and the second movable plunger in FIG. 4 .

FIG. 7 shows the contact state between the ball grid array (BGA) type second terminal and the first movable plunger and the second movable plunger.

FIG. 8 shows the contact state between the pad-type second terminal and the first and second movable plungers.

Figure 9 shows a movable plunger according to a second embodiment of the present disclosure.

Figure 10 shows a plurality of movable plungers according to a third embodiment of the present disclosure.

Figure 11 shows a probe contact utilizing the movable plunger of Figure 10.

Figure 12 shows a plurality of movable plungers according to a fourth embodiment of the present disclosure.

Figure 13 shows a plurality of movable plungers according to a fifth embodiment of the present disclosure.

Figure 14 shows a plurality of movable plungers according to a sixth embodiment of the present disclosure.

Below, embodiments of the present disclosure will be explained in detail with reference to the accompanying drawings.

Figure 1 is a perspective view of the probe contact 1 according to the first embodiment of the present disclosure. Figure 2 is an exploded perspective view of the probe contact 1 shown in Figure 1. Figure 3 is a side view of the probe contact 1. Figure 4 is A cross-sectional view taken along lines A-A and B-B of FIG. 2 , FIG. 5 is a cross-sectional view showing the independent sliding operation of the first movable plunger 12 - 1 and the second movable plunger 12 - 2 in FIG. 4 , and FIG. 6 is a cross-sectional view showing The cross-sectional view of the first movable plunger 12-1 and the second movable plunger 12-2 in simultaneous sliding operation is shown in Figure 4.

The probe contact 1 can be supported on a flat-type test socket (not shown) parallel to the test direction. The probe contacts 1 may include opposing end portions partially protruding from the top and bottom surfaces of the test socket. During testing, the second terminal 31 of the object under test 3 may press one end portion of the probe contact 1 protruding from the top or bottom surface. In this case, the probe contact 1 can, for example, electrically connect the first terminal 21 of the test circuit board 2 and the second terminal 31 of the object to be tested 3 (for example, a semiconductor).

Referring to FIGS. 1 to 6 , the probe contact 1 may include: a stationary plunger 11 having a first end that contacts the first terminal 21 of the test circuit board 2 ; a plurality of movable plungers 12 having contacts with the object to be tested. The first end of the second terminal 31 of 3 makes contact; and the spring 13 is provided between the stationary plunger 11 and the movable plunger 12 and provides elasticity.

The stationary plunger 11 may include a first body 111 and a pair of first protrusions 112 protruding from the first body 111 in a direction transverse to a longitudinal direction of the first body 111 .

The stationary plunger 11 can be made of conductive material and manufactured by microelectromechanical systems (MEMS) or molds.

The first body 111 may include a stationary contact part 113 provided at a first end thereof for contacting the first terminal 21 , and a first coupling part 114 provided at a second end thereof.

The first coupling part 114 may include a guide rail 1141 embedded in the guide groove 1241 of the movable plunger 12 , and a guide wall 1142 protruding from a side wall of the guide rail 1141 .

The shape of the guide rail 1141 is plate-like, and the thickness may be equal to or thicker than the width of the guide groove 1241 of the movable plunger 12 . The guide rail 1141 is formed with fastening grooves 1141a which are recessed on both surfaces of the guide rail 1141 in the width direction. The fastening groove 1141a may be detachably engageable with a fastening protrusion 1241a formed on the track support 1242 of the movable plunger 12.

The guide wall 1142 not only prevents the movable plunger 12 placed on the guide rail 1141 from being separated in the width direction during sliding movement, but also guides the movable plunger 12 from sliding movement.

The first body 111 may include an opening 115 formed between the stationary contact part 113 and the first coupling part 114 in a longitudinal direction.

As shown in FIG. 2 , the opening 115 may be formed to penetrate the first body 111 in the thickness direction. The opening 115 has an inner wall 116 that interfaces with the guide rail 1141 so that a pair of hooks 1244 (to be explained later) provided in the second coupling portion 124 of the movable plunger 12 can be hooked and coupled to the inner wall 116 . The opening 115 may provide a space in which the pair of hooks 1244 can move as the movable plunger 12 slides.

According to an alternative embodiment, the opening 115 may be formed to be recessed to a predetermined depth on both sides of the first body 111 .

The pair of first protrusions 112 may protrude from both sides of the first body 111 transversely to the longitudinal direction.

The stationary plunger 11 can be partially embedded in the spring 13 from the first protrusion 112 to the second end portion.

The movable plunger 12 may include a first movable plunger 12-1 and a second movable plunger 12-2 that overlap each other in surface contact. Movable plunger 12 may include three or more plungers.

Each movable plunger 12 may include a second body 121 and a pair of second protrusions 122 protruding from the second body 121 in a direction transverse to a longitudinal direction of the second body 121 .

The movable plunger 12 can be made of conductive material and manufactured by MEMS or molding.

The second body 121 may include a movable contact part 123 provided at a first end thereof for contacting the second terminal 31 , and a second coupling part 124 provided at a second end thereof.

The second coupling portion 124 may cross and be coupled to the first coupling portion 114 of the stationary plunger 11 at an angle of 90 degrees.

The second coupling part 124 may include a guide groove 1241 that is recessed toward the second end portion of the second body 121 in the longitudinal direction.

The second coupling portion 124 may include a pair of rail supports 1242 separated by a guide groove 1241 . The pair of rail supports 1242 can respectively contact two surfaces of the guide rail 1141 of the stationary plunger 11 and achieve electrical connection.

The pair of track supports 1242 may each include the pair of hooks 1244 at free end portions thereof.

The pair of hooks 1244 may protrude toward each other and hook to the inner wall 116 of the opening 115 of the stationary plunger 11 . The pair of hooks 1244 can prevent the stationary plunger 11 and the plurality of movable plungers 12 that are coupled and engaged with each other from being separated during sliding.

The pair of hooks 1244 may protrude toward the inside of the guide groove 1241 . As the guide groove 1241 becomes narrower, the protruding length of the pair of hooks 1244 is more limited. Therefore, it is impossible to ensure that the pair of hooks 1244 are reliably hooked to the inner wall of the opening 115 . An extension groove 1246 extending in the width direction of the pair of rail supports 1242 may be formed between the pair of rail supports 1242 and the pair of hooks 1244 .

The width of the guide groove 1241 may be equal to or greater than the thickness of the guide rail 1141 of the stationary plunger 11 .

The pair of second protrusions 122 may protrude from both sides of the second body 121 transversely to the longitudinal direction of the second body 121 . The pair of second protrusions 122 can support the second end of the spring 13 , thereby constraining the spring 13 together with the first protrusion 112 of the stationary plunger 11 that supports the first end of the spring 13 .

The first movable plunger 12-1 and the second movable plunger 12-2 may be partially embedded in the spring 13 from the second protrusion 122 to the second end where the hook 1244 is located.

The first movable plunger 12-1 and the second movable plunger 12-2 can slide and operate independently of each other. In other words, when the second terminal 31 is only pressed against the first movable plunger 12-1, the second movable plunger 12-2 may not slide. On the other hand, when the second terminal 31 When only pressed against the second movable plunger 12-2, the first movable plunger 12-1 may not slide and move. In addition, when the second terminal 31 is pressed against both the first movable plunger 12-1 and the second movable plunger 12-2, both the first movable plunger 12-1 and the second movable plunger 12-2 can slide. Move.

The detailed structure of the first movable plunger 12-1 and the second movable plunger 12-2 to slide and operate independently of each other will be explained later.

The spring 13 is sandwiched between the stationary plunger 11 and the plurality of movable plungers 12 that cross each other and are coupled to each other. In other words, the spring 13 is located between the first protrusion 112 and the second protrusion 122, thereby providing elasticity. During the test, the stationary plunger 11 or the plurality of movable plungers 12 slides and moves when pressed by the first terminal 21 or the second terminal 31 . In this case, the first protrusion 112 or the second protrusion 122 can compress the spring 13 .

The spring 13 can provide elasticity in the range of 1 gram force (gf) to 10 gf (this is not limited).

The pair of first protrusions 112 and the pair of second protrusions 122 can support two ends of the spring 13 respectively, thereby restricting the spring 13 .

Hereinafter, the independent sliding structure and operation of the plurality of movable plungers 12 will be explained in detail with reference to FIGS. 3 to 5 .

Referring to FIG. 4 , the guide rail 1141 is formed with fastening grooves 1141a recessed on both surfaces thereof, and the track support 1242 coupled to the guide rail 1141 includes a fastening protrusion 1241a embedded in the fastening groove 1141a.

The fastening groove 1141a and the fastening protrusion 1241a may be formed to have gentle ramp, so that the fastening groove 1141a and the fastening protrusion 1241a can be easily released from the engagement state pressed by the second terminal 31 during testing, and engage with each other again when the elasticity of the spring 13 is restored.

Referring to FIG. 5 , when the second terminal 31 is only pressed by the first movable plunger 12 - 1 , the second movable plunger 12 - 2 may not slide. In other words, the second movable plunger 12-2 to which pressure is not applied may not slide to support the load through the engagement between the fastening groove 1141a and the fastening protrusion 1241a. On the other hand, when pressure is applied only to the second movable plunger 12-2, the first movable plunger 12-1 may not slide to operate.

Referring to Figure 6, the second terminal 31 is pressed against both the first movable plunger 12-1 and the second movable plunger 12-2, and both the first movable plunger 12-1 and the second movable plunger 12-2 can slide. operate.

According to an alternative embodiment, the fastening groove 1141a of the guide rail 1141 and the fastening protrusion 1241a of the rail support 1242 may be omitted. In this case, the first movable plunger 12-1 and the second movable plunger 12-2 may be engaged with and supported by the track support 1242.

7 and 8 illustrate the contact state of the first movable plunger 12-1 and the second movable plunger 12-2 with the ball grid array (BGA) type second terminal 31 and the pad type second terminal 31.

Referring to FIG. 7 , the BGA type second terminal 31 is not flat but hemispherical, and therefore moves downward and first comes into contact with the first movable plunger 12 - 1 . Then, the second terminal 31 further moves downward and also comes into contact with the second movable plunger 12-2.

Referring to FIG. 8 , the pad-type second terminal 31 may be disposed on the same plane as the surrounding non-terminal portion 32 . In this case, as the second terminal 31 moves downward, the first movable plunger 12-1 comes into contact with the non-terminal part 32, and the second movable plunger 12-2 comes into contact with the second terminal 31.

In a conventional probe contact, both the first movable plunger and the second movable plunger move simultaneously as a single body, and therefore the tip of the second movable plunger does not press the pad with enough force. type second terminal. Therefore, the reliability of the test is reduced. In addition, the traditional probe contacts require two independent springs to enable the movable plungers to slide independently, thereby making the manufacturing of the traditional probe contacts difficult and increasing the cost.

Figure 9 shows a movable plunger 42 according to a second embodiment of the present disclosure.

Referring to FIG. 9 , the plurality of movable plungers 42 may include a first movable plunger 42 - 1 and a second movable plunger 42 - 2 that overlap and are in surface contact with each other. The plurality of movable plungers 42 may include three or more movable plungers. Hereinafter, repeated description of the same structure as the first movable plunger 12-1 and the second movable plunger 12-2 according to the first embodiment will be omitted.

The first movable plunger 42 - 1 may include a second protrusion 422 protruding from one surface thereof in a direction transverse to the longitudinal direction of the second body 421 .

The second movable plunger 42-2 may include a third protrusion 423 protruding from one surface thereof in a direction transverse to the longitudinal direction of the second body 421.

The second protrusion 422 and the third protrusion 423 may protrude in opposite directions.

The second protrusion 422 and the third protrusion 423 may include a guide groove 4241 extending in the longitudinal direction of the second body 421 . When the first movable plunger 42-1 and the second movable plunger 42-1 When the moving plunger 42 - 2 slides and moves alone or simultaneously, the second protrusion 422 and the third protrusion 423 can press the two points P1 and P2 of the spring 13 in opposite directions.

Therefore, when the second terminal (see "31" in Figure 7) is pressed against the first movable plunger 42-1 during testing, the second protrusion 422 can be offset in the longitudinal direction relative to the center of the spring 13. Press the point P1 of the spring 13 in a positioning manner. Therefore, the spring 13 is first pressed at the point P1 supported on the second protrusion 422 and may buckle and deform relative to the central axis of the spring 13 . Therefore, the first movable plunger 42-1 is pressed and slides, but the second movable plunger 42-2 is not pressed and does not slide.

In this way, it is different from the structure of the first movable plunger 12-1 and the second movable plunger 12-2 according to the first embodiment (ie, the engagement structure between the fastening groove 1141a and the fastening protrusion 1241a). Independently or in combination, the points of the spring 13 may be pressed in an offset manner in the longitudinal direction relative to the center of the spring 13 .

FIG. 10 shows a plurality of movable plungers 52 according to a third embodiment of the present disclosure, and FIG. 11 shows a probe contact 1 using the movable plungers 52 of FIG. 10 .

Referring to FIGS. 10 and 11 , the plurality of movable plungers 52 may include a first movable plunger 52 - 1 and a second movable plunger 52 - 2 that overlap and are in surface contact with each other. The movable plunger 52 may include three or more movable plungers. Hereinafter, repeated description of the same structure as the first movable plunger 12-1 and the second movable plunger 12-2 according to the first embodiment will be omitted.

The first movable plunger 52 - 1 may include a second protrusion 522 protruding from one side thereof in a first direction transverse to the longitudinal direction of the second body 521 .

The second movable plunger 52-2 may include a third protrusion 523 protruding from one side thereof in a second direction transverse to the longitudinal direction of the second body 521 and opposite to the first direction.

The second protrusion 522 and the third protrusion 523 may be disposed symmetrically about the center of the spring 13 in the longitudinal direction. When the first movable plunger 52-1 and the second movable plunger 52-2 slide and move individually or simultaneously, the second protrusion 522 and the third protrusion 523 can respectively move the two points P1 and P1 in opposite directions of the spring 13. P2 performs compression.

Therefore, when the second protrusion 522 and the third protrusion 523 protruding in opposite directions to each other exert an unbalanced force in the longitudinal direction with respect to the center of the spring 13 to the point of the spring 13, the first movable plunger 52 -1 and the second movable plunger 52-2 can cause the buckling deformation of the spring 13.

Figure 12 shows a plurality of movable plungers 62 according to a fourth embodiment of the present disclosure.

Referring to FIG. 12 , the plurality of movable plungers 62 may include a first movable plunger 62 - 1 and a second movable plunger 62 - 2 that overlap and are in surface contact with each other. The plurality of movable plungers 62 may include three or more movable plungers. Hereinafter, repeated description of the same structure as the first movable plunger 12-1 and the second movable plunger 12-2 according to the first embodiment will be omitted.

The first movable plunger 62-1 may include a pair of second protrusions 622-1 and 622-2 protruding from opposite sides thereof in a direction transverse to the longitudinal direction of the second body 621.

The second movable plunger 62-2 may include a pair of third protrusions 623-1 and a third protrusion 623-1 protruding from opposite sides thereof in a direction transverse to the longitudinal direction of the second body 621. Protuberance 623-2.

The pair of second protrusions 622-1 and 622-2 protrude in opposite directions to each other and have different lengths relative to the length direction of the second body 621.

The pair of third protrusions 623-1 and 623-2 protrude in opposite directions to each other and have different lengths relative to the length direction of the second body 621.

In addition, with respect to the length direction of the second body 621, the second protrusions 622-1 and the third protrusions 623-1 that are adjacent to each other may have different lengths, and the second protrusions 622-2 and the third protrusions that are adjacent to each other may have different lengths. The three protrusions 623-2 may have different lengths. In other words, the second protrusion 622-1 and the third protrusion 623-2 may contact the end portion of the spring 13 at opposite positions. At this time, the second protrusion 622-2 and the third protrusion 623-1 may be spaced apart from the end portion of the spring 13 at opposite positions.

Therefore, when the second terminal 31 is pressed only against the first movable plunger 62-1 during testing, the second protrusion 622-1 may exert an unbalanced force on the end portion of the spring 13 relative to the center of the spring 13 . Therefore, the spring 13 is first compressed at the portion supported by the second protrusion 622 - 1 and the opposite portion is lifted, thereby causing buckling deformation relative to the central axis of the spring 13 . Therefore, the first movable plunger 62-1 is pressed and slides, but the second movable plunger 62-2 is not pressed and does not slide.

Figure 13 shows a plurality of movable plungers 72 according to a fifth embodiment of the present disclosure.

Referring to FIG. 13 , the plurality of movable plungers 72 may include a first movable plunger 72 - 1 and a second movable plunger 72 - 2 that overlap and are in surface contact with each other. the plurality of The movable plunger 72 may include three or more movable plungers. Hereinafter, repeated description of the same structure as the first movable plunger 12-1 and the second movable plunger 12-2 according to the first embodiment will be omitted.

The first movable plunger 72 - 1 may include a first contact end portion 722 provided at one end portion of the second body 721 to make contact with the second terminal 31 .

The first contact end portion 722 may include a first tip 7221 extending in the width direction of the second body 721, a second tip 7222 extending to half the width of the second body 721, and a second tip 7222 disposed between the first tip 7221 and the second tip 7222. A first intermediate tip 7223 between the tips 7222.

The first tip 7221 may be inclined downward toward the middle from one side in the width direction, and the second tip 7222 may be inclined downward toward the middle from the other side in the width direction. The first intermediate tip 7223 may be disposed in a V-shaped groove formed between the first tip 7221 and the second tip 7222.

The second movable plunger 72 - 2 may include a second contact end portion 723 provided at one end portion of the second body 721 to make contact with the second terminal 31 .

The second contact end portion 723 may include a third tip 7231 extending in the width direction of the second body 721, a fourth tip 7232 extending to half the width of the second body 721, and a third tip 7231 and a fourth tip 7232 disposed between the third tip 7231 and the fourth tip 7232. A second intermediate tip 7233 between the tips 7232.

The third tip 7231 may be inclined downward toward the middle from one side in the width direction, the fourth tip 7232 may be inclined downward toward the middle from the other side in the width direction, and the second middle tip 7233 may be disposed at the third tip 7231 and fourth tip 7232 in the V-shaped groove formed between them.

As mentioned above, the plurality of movable plungers 72 include six contact points to thereby improve test reliability, and by embedding the second terminal 31 into the V-shaped groove to thereby strengthen the hard second terminal 31 Conduct tests to implement said tests.

Figure 14 shows a plurality of movable plungers 82 according to a sixth embodiment of the present disclosure.

Referring to FIG. 14 , the plurality of movable plungers 82 may include a first movable plunger 82 - 1 and a second movable plunger 82 - 2 that overlap and are in surface contact with each other. The plurality of movable plungers 82 may include three or more movable plungers. Hereinafter, repeated description of the same structure as the first movable plunger 12-1 and the second movable plunger 12-2 according to the first embodiment will be omitted.

The first movable plunger 82 - 1 may include a first contact end portion 822 provided at one end portion of the second body 821 to make contact with the second terminal 31 .

The first contact end portion 822 may include a first tip 8221 inclined downward from a first side in the width direction of the second body 821 toward a second side, and a second tip 8222 inclined downward parallel to the first tip 8221 .

The first tip 8221 is higher than the second tip 8222, thereby forming a height difference in the longitudinal direction of the second body 821.

The second movable plunger 82 - 2 may include a second contact end portion 823 provided at one end portion of the second body 821 to make contact with the second terminal 31 .

The second contact end portion 823 may include a third tip 8231 that is inclined downward from the second side in the width direction of the second body 821 toward the first side, and a fourth tip 8232 that is inclined downward parallel to the third tip 8231 .

The third tip 8231 is higher than the fourth tip 8232, thereby forming a height difference in the longitudinal direction of the second body 821.

As described above, the plurality of movable plungers 82 include first and second tips 8221 and 8222 that are inclined and have different heights from each other in the longitudinal direction, and a third tip that is inclined and have different heights from each other in the longitudinal direction. 8231 and a fourth tip 8232, whereby inclined or highly different portions are used to push out foreign objects (eg, tin (Sn)) during testing.

According to the present disclosure, although the probe contact has a simple structure (ie, a pair of plungers are provided in a single spring structure and operate independently to make contact with the test terminal), the probe contact can adaptively respond to Various shapes of test terminals, thereby reducing costs and making it possible to manufacture very small probe contacts.

In the foregoing description, advantages of the present disclosure have been set forth with reference to specific embodiments. However, it will be apparent to one of ordinary skill in the art that various modifications and changes can be made without departing from the scope of the disclosure as defined in the appended claims. Accordingly, the description and drawings need to be construed as examples of the disclosure and not as limitations of the disclosure. All such possible modifications are intended to be made within the scope of this disclosure.

11:Static plunger

12: Movable plunger

12-1:The first movable plunger

12-2: Second movable plunger

13:Spring

111:First subject

112:The first protrusion

113: Stationary contact part

114: First coupling part

115:Open your mouth

116:Inner wall

121:Second subject

122:Second protrusion

123:Activity Contact Department

124: Second coupling part

1141:Guide rail

1141a: Fastening groove

1142:Guide wall

1241:Guide groove

1241a: Fastening protrusion

1242:Track supports

1244:hook

1246:Extended groove

Claims (12)

A probe contact for electrical connection between a first terminal and a second terminal, including: a stationary plunger, including a first body and a first protrusion, the first body having a connection with the first terminal The first end for making contact, the first protrusion protrudes transversely to the longitudinal direction of the first body; a plurality of movable plungers includes a second body and a second protrusion, the second body has a The first end of the second terminal makes contact and the second end makes electrical contact with the stationary plunger, the second protrusion protrudes transversely to the longitudinal direction of the second body, and the plurality of movable A plunger is arranged to slide relative to each other independently in the longitudinal direction of the second body; and a spring is arranged between the first protrusion and the second protrusion, wherein only the first protrusion is pressed during the test. The movable plunger moves slidingly. The probe contact of claim 1, wherein each of the plurality of movable plungers includes a first coupling portion, and a second end of the first coupling portion of the movable plunger is coupled to the stationary plunger. The second end of the stationary plunger is slidably movable relative to the second end of the stationary plunger, the stationary plunger includes a second coupling portion, and the second coupling portion of the stationary plunger is disposed on the stationary plunger. The second end of the plunger is coupled to the first coupling portion of the movable plunger, the first coupling portion of the movable plunger, and the second coupling portion of the stationary plunger. One of includes at least one support protrusion on its coupling surface, and The other one of the first coupling portion of the movable plunger and the second coupling portion of the stationary plunger includes a support groove to detachably embed the at least one support protrusion in the in the support groove. The probe contact of claim 1, wherein the second protrusion exerts on the end portion of the spring in the longitudinal direction of the second body relative to the center of the spring during testing. unbalanced forces and cause buckling deformation in the spring. The probe contact according to claim 1, wherein the second body is plate-like in shape, and the second protrusion protrudes from one side of the second body in the width direction. The probe joint of claim 4, wherein the second protrusion of the movable plunger is positioned symmetrically about the center of the spring in the longitudinal direction of the second body. The probe contact of claim 1, wherein the second protrusions of the movable plunger protrude in opposite directions to each other. The probe contact of claim 1, wherein the second body is plate-like in shape, and the second protrusion includes a pair of protrusions protruding from opposite sides of the second body in the width direction. , and the pair of protrusions are formed to have different heights from each other in the longitudinal direction of the second body. A probe contact as claimed in claim 1, wherein The second body is plate-like in shape, and the second protrusion protrudes from one surface of the second body in a thickness direction. The probe contact of claim 8, wherein the second protrusion includes an inclined surface in contact with an end portion of the spring. The probe joint of claim 1, wherein the first body of the stationary plunger includes a guide rail, the plurality of movable plungers are engaged with the guide rail, and all of the movable plungers are engaged with the guide rail. The second body includes a guide groove recessed along the longitudinal direction of the second body and disposed on the guide rail. The probe joint of claim 10, wherein the guide rail includes guide walls extending on opposite sides of the guide rail along the longitudinal direction of the first body and protruding in the thickness direction. A test socket supports the probe contact according to any one of claims 1 to 11.

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