Vertical probe assembly capable of effectively reducing contact resistance

Abstract

The invention relates to the technical field of probes, and discloses a vertical probe assembly capable of effectively reducing contact resistance, which comprises a connecting part, the connecting part comprises a horizontal plate, the horizontal plate is fixedly connected with a connecting rod through a hollow pipe arranged on the upper surface of the horizontal plate, the top end of the connecting rod is connected with external measuring equipment, and the top end of the connecting rod is connected with a tip part. The tip part comprises a tip body, and the circumferential outer surface of the tip body is in sliding connection with the interior of the horizontal plate. According to the vertical probe assembly capable of effectively reducing the contact resistance, the problems that in the prior art, the design and manufacturing requirements of a vertical probe for high precision are effectively solved, the resistance between the vertical probe and a contact surface is as small as possible, a sharp and slender tip is provided, high contact pressure between the vertical probe and the contact surface is realized, and the tip of the probe is very fine, so that the contact resistance is reduced. Therefore, in the testing process, the pressure applied to the surface of the object to be tested by the tip of the probe is too large, so that the surface can be damaged or scratched.

Description

Technical Field

[0001] The invention relates to the field of probe technology, and in particular to a vertical probe assembly capable of effectively reducing contact resistance. Background Art

[0002] A vertical probe is an electronic test device that is commonly used in semiconductor testing, circuit board testing, integrated circuit (IC) testing, and other applications that require precise electrical connections. The main feature of a vertical probe is that the contact tip of the probe is perpendicular to the probe body, which enables the probe to effectively contact the test points on the circuit board (such as solder joints, pins, or specific test nodes).

[0003] The design and manufacture of vertical probes require high precision to ensure that the resistance with the contact surface is as small as possible, thereby improving the efficiency and accuracy of signal transmission. Generally, materials with high conductivity, such as platinum, gold or silver, are selected because these materials have low resistivity and good corrosion resistance. At the same time, the tip design requires a very fine, sharp and slender tip to achieve high contact pressure with the contact surface, thereby reducing the contact area and reducing resistance to ensure that very small test points can be accurately contacted. Since the tip of the probe is very fine, the pressure applied by the tip of the probe to the surface of the object to be tested during the test is too large, which may cause surface damage or scratches. Summary of the invention

[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a vertical probe assembly that effectively reduces contact resistance, which can effectively solve the problem in the prior art that the design and manufacturing of the vertical probe require high precision to ensure that the resistance with the contact surface is as small as possible, and the tip is sharp and slender to achieve high contact pressure with the contact surface. Since the tip of the probe is very fine, during the test process, the pressure applied by the tip of the probe to the surface of the object to be tested is too large, which may cause surface damage or scratches. Technical Solution

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a vertical probe assembly that effectively reduces contact resistance, comprising: A connecting part, the connecting part comprising a horizontal plate, the horizontal plate being fixedly connected to a connecting rod via a hollow tube arranged on an upper surface thereof, and a top end of the connecting rod being connected to an external measuring device; A tip portion, the tip portion comprising a tip body, the circumferential outer surface of the tip body being slidably connected to the interior of the horizontal plate, the top end of the tip body penetrating the horizontal plate and extending into the hollow tube, the circumferential outer surface of the tip body being sleeved with a circular plate, the upper surface of the circular plate being provided with a return spring connected to the lower surface of the horizontal plate; The horizontal plate is installed with a limit plate through a coupling member arranged on its lower surface, and the limit plate is sleeved on the outer circumferential surface of the tip body, and the lower tip portion of the tip body passes through the limit plate and extends to the outside.

[0006] Furthermore, the structure of the limiting plate adopts a ring-shaped design, and the lower surface of the limiting plate is fixedly connected with a suction plate.

[0007] Furthermore, the coupling member includes an external tube and an internal rod, the top end of the external tube is fixedly connected to the lower surface of the horizontal plate, the inner wall of the external tube is slidably connected to the circumferential outer surface of the internal rod, and the bottom end of the internal rod is fixedly connected to the upper surface of the limit plate.

[0008] Furthermore, the circumferential outer surface of the lower half of the inner connecting rod adopts a threaded design, and the circumferential outer surface of the inner connecting rod is threadedly connected with a threaded tooth block, and the threaded tooth block is rotatably mounted on a rotating seat through a groove opened on its upper surface, and a thin rod is fixedly connected to the upper surface of the rotating seat, and the external connecting tube is fixedly connected to the top end of the thin rod through a ring block arranged on its circumferential outer surface.

[0009] Furthermore, the horizontal plate is fixedly connected to an annular box via a smooth rod arranged on its lower surface, and a gear ring meshing with a threaded gear block is rotatably mounted on the inner wall of the annular box, and an elastic ring is sleeved on the circumferential outer surface of the gear ring, and the elastic ring is located in the space enclosed by the annular box.

[0010] Furthermore, the elastic ring adopts an open design, and the circumferential outer surface of the annular box is provided with a through hole matched with the open end of the elastic ring.

[0011] Furthermore, the circumferential outer surface of the smooth rod is slidably connected to a ring plate, the lower surface of the ring plate is provided with a strong spring connected to the upper surface of the annular box, the circumferential outer surface of the ring plate is fixedly connected to a locking ring that slides with the circumferential outer surface of the thin rod, and the inner side surface of the locking ring adopts a conical surface design, and the non-threaded circumferential outer surface of the inner connecting rod is provided with a conical block that fits tightly with the inner wall of the locking ring. Beneficial Effects

[0012] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a limit plate. During use, the tip body contacts the part to be tested first. As the external measuring device moves downward, the connecting rod, the hollow tube, the horizontal plate, the coupling member, the limit plate and the suction plate are driven to move downward synchronously. At the same time, the tip body begins to squeeze the reset spring until the lower surface of the suction plate is tightly fitted on the surface to be tested. The limit plate is used to control the test pressure of the tip body. Under the premise that the reset spring remains unchanged, the test pressure depends on the distance between the lowest point of the tip body and the lower surface of the suction plate. At the same time, the vertical accuracy of the tip body and the stability of the test can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 3 It is a schematic diagram of a three-dimensional multi-angle structure of an embodiment of the present invention; Figure 4 For the embodiment of the present invention Figure 3 A schematic diagram of the structure with a partial enlargement at the center; Figure 5 It is a schematic diagram of the structure of three-dimensional separation of an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the three-dimensional separation of the connecting part in an embodiment of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the inner connecting rod, threaded tooth block and gear ring according to an embodiment of the present invention.

[0015] The numbers in the figure represent respectively: 1. connecting part; 11. horizontal plate; 111. smooth rod; 112. annular box; 113. gear ring; 114. elastic ring; 115. ring plate; 116. strong spring; 117. locking ring; 12. hollow tube; 13. connecting rod; 14. coupling; 141. external tube; 142. internal rod; 1421. conical block; 143. threaded tooth block; 144. rotating seat; 145. thin rod; 146. ring block; 15. limit plate; 151. suction plate; 2. tip; 21. tip body; 22. round plate; 23. reset spring. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention will be further described below in conjunction with the embodiments. Example

[0018] See also Figure 1-Figure 7 The present invention provides a technical solution: a vertical probe assembly that effectively reduces contact resistance, comprising: A connecting part 1, the connecting part 1 comprises a horizontal plate 11, the horizontal plate 11 is fixedly connected to a connecting rod 13 via a hollow tube 12 arranged on the upper surface thereof, and the top end of the connecting rod 13 is connected to an external measuring device; The tip portion 2 includes a tip body 21, the outer circumferential surface of the tip body 21 is slidably connected to the inside of the horizontal plate 11, the top of the tip body 21 penetrates the horizontal plate 11 and extends into the hollow tube 12, a circular plate 22 is sleeved on the outer circumferential surface of the tip body 21, and a return spring 23 connected to the lower surface of the horizontal plate 11 is provided on the upper surface of the circular plate 22; The horizontal plate 11 is installed with a limit plate 15 via a coupling member 14 disposed on its lower surface, and the limit plate 15 is sleeved on the outer circumferential surface of the tip body 21 , and the lower tip portion of the tip body 21 passes through the limit plate 15 and extends to the outside.

[0019] The structure of the limiting plate 15 is annular in design, and a suction plate 151 is fixedly connected to the lower surface of the limiting plate 15 .

[0020] The coupling member 14 includes an external tube 141 and an internal rod 142. The top of the external tube 141 is fixedly connected to the lower surface of the horizontal plate 11, the inner wall of the external tube 141 is slidably connected to the circumferential outer surface of the internal rod 142, and the bottom end of the internal rod 142 is fixedly connected to the upper surface of the limit plate 15.

[0021] The outer surface of the lower half of the circumference of the inner connecting rod 142 adopts a threaded design, and the outer surface of the circumference of the inner connecting rod 142 is threadedly connected with a threaded tooth block 143. The threaded tooth block 143 is rotatably installed with a rotating seat 144 through a groove opened on its upper surface. A thin rod 145 is fixedly connected to the upper surface of the rotating seat 144, and the external tube 141 is fixedly connected to the top of the thin rod 145 through a ring block 146 arranged on its circumferential outer surface.

[0022] The horizontal plate 11 is fixedly connected to the annular box 112 via a smooth rod 111 arranged on its lower surface. A gear ring 113 meshing with the threaded gear block 143 is rotatably installed on the inner wall of the annular box 112. An elastic ring 114 is sleeved on the circumferential outer surface of the gear ring 113, and the elastic ring 114 is located in the space enclosed by the annular box 112.

[0023] The elastic ring 114 is of open design, and a through hole matching the open end of the elastic ring 114 is formed on the circumferential outer surface of the annular box 112 .

[0024] The circumferential outer surface of the smooth rod 111 is slidably connected with a ring plate 115, and the lower surface of the ring plate 115 is provided with a strong spring 116 connected to the upper surface of the ring box 112, and the circumferential outer surface of the ring plate 115 is fixedly connected with a locking ring 117 that slides with the circumferential outer surface of the thin rod 145, and the inner side surface of the locking ring 117 adopts a conical surface design, and the non-threaded circumferential outer surface of the inner connecting rod 142 is sleeved with a conical block 1421 that fits tightly with the inner wall of the locking ring 117.

[0025] refer to Figure 1-Figure 7 The design and manufacture of vertical probes require high precision to ensure that the resistance with the contact surface is as small as possible, thereby improving the efficiency and accuracy of signal transmission. The sharp and slender tip is used to achieve high contact pressure with the contact surface, thereby reducing the contact area and reducing the resistance to ensure that very small test points can be accurately contacted. Since the tip of the probe is very fine, the pressure applied by the tip of the probe to the surface of the object to be tested is too large during the test, which may cause surface damage or scratches; In order to overcome the above-mentioned defects, the present invention designs a vertical probe assembly which effectively reduces the contact resistance.

[0026] Probe testing process: When testing the circuit nodes, component pins, and contact points of the circuit board, first ensure that the tip surface of the probe is smooth, clean, and free of oxide layers or other contaminants. Then, after the external measuring equipment is calibrated, the tip body 21 on the tip portion 2 begins testing. When the tip body 21 contacts the part to be tested, appropriate pressure can ensure good contact between the tip body 21 and the contact surface. The tip of the tip body 21 is designed to be sharp and slender to achieve high contact pressure with the contact surface, thereby reducing the contact area and reducing resistance. At the same time, the reaction force of the part to be tested will drive the tip body 21 to slide upward along the inside of the horizontal plate 11, driving the reset spring 23 to be further compressed and buffered.

[0027] In order to prevent the tip of the tip body 21 from damaging or scratching the surface to be tested, the present application is provided with a limit plate 15, which is used to control the contact pressure of the tip body 21, so that the test pressure of the tip body 21 is always maintained at a constant value, thereby avoiding the problem that the tip of the tip body 21 damages or scratches the surface to be tested. During use, the tip body 21 contacts the part to be tested first, and as the external measuring device moves downward, the connecting rod 13, the hollow tube 12, the horizontal plate 11, the coupling 14, the limit plate 15 and the suction plate 151 move downward synchronously. At the same time, the tip body 21 begins to squeeze the reset spring 23 until the lower surface of the suction plate 151 is tightly fitted on the surface to be tested. To sum up, for the efficiency and accuracy of signal transmission, the tip of the tip body 21 needs to be made sharp and slender, so as to reduce the contact area and reduce the resistance. At the same time, the present application also provides a limit plate 15 for controlling the test pressure of the tip body 21 (under the premise that the reset spring 23 remains unchanged, the test pressure depends on the distance between the lowest point of the tip body 21 and the lower surface of the suction plate 151). After the limit plate 15 is in contact with the surface to be tested, the limit plate 15 remains parallel to the surface to be tested, which can not only improve the vertical accuracy of the tip body 21, but also improve the stability of the test of the tip body 21, thereby avoiding the deviation of the tip body 21 during the test, which affects the test accuracy.

[0028] Probe test pressure adjustment process: During the test of the tip body 21, the required test pressure is different for different surfaces of the object to be tested. Appropriate pressure is used to ensure good contact between the tip body 21 and the contact surface to avoid increased resistance due to excessive or insufficient pressure. This is achieved by adjusting the distance between the lower surface of the suction plate 151 and the lowest point of the tip body 21.

[0029] Initially, the elastic ring 114 is in an automatic stretching state under the action of its own elastic force, and the inner side of the elastic ring 114 is not tightly fitted with the toothed ring 113 (the elastic ring 114 can rotate freely). When the height of the limit plate 15 and the suction plate 151 needs to be adjusted, the operator holds the open end of the elastic ring 114 with both hands, and the inner side of the elastic ring 114 and the circumferential outer surface of the toothed ring 113 begin to fit tightly (the joint surface can be designed in a rough style), and the two are combined into a whole. The rotating elastic ring 114 drives the toothed ring 113 to rotate around the inside of the annular box 112, and the toothed ring 113 drives the four groups of threaded tooth blocks 143 to rotate synchronously around the rotating seat 144. Since the smooth parts of the four groups of internal connecting rods 142 all extend into the external pipe 141, during the rotation of the four groups of threaded tooth blocks 143, the corresponding internal connecting rods 142 will be driven to move up and down synchronously, driving the limit plate 15 and the suction plate 151 to move up and down synchronously and smoothly.

[0030] As can be seen from the above, the connecting portion 1 has the following advantages: Advantage 1: The elastic ring 114 drives the gear ring 113 to rotate, drives the four sets of threaded tooth blocks 143 to rotate synchronously around the rotating seat 144, drives the inner connecting rod 142, the limit plate 15, and the suction plate 151 to move up and down synchronously, and realizes the test pressure adjustment of the tip body 21.

[0031] Advantage 2: Since the four groups of inner connecting rods 142 move up and down synchronously, the limit plate 15 and the suction plate 151 can achieve horizontal and vertical smooth movement, ensuring the vertical accuracy of the subsequent tip body 21.

[0032] Advantage three: under the action of its own elastic force, the inner side of the elastic ring 114 is not tightly fitted with the toothed ring 113 at the beginning. After the elastic ring 114 is rotated and adjusted, the adjustment distance does not reach the preset value. The elastic ring 114 can be quickly separated by repeatedly locking the toothed ring 113 and rotating it until the adjustment distance reaches the preset value.

[0033] In order to prevent the inner rod 142 from axial movement during long-term testing and affect the test accuracy of the tip body 21, the present application also provides a ring plate 115, a strong spring 116 and a locking ring 117. The outer circumferential surface of the inner rod 142 is sleeved with a conical block 1421, and the conical surface fits tightly with the locking ring 117, which can prevent the inner rod 142 and the conical block 1421 from axial movement. When the height of the inner rod 142 needs to be adjusted, it is only necessary to press two parts of the ring plate 115 with two fingers to drive the locking ring 117 and the conical block 1421 to separate.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vertical probe assembly that effectively reduces contact resistance, characterized in that: include: A connecting portion (1), the connecting portion (1) comprising a horizontal plate (11), the horizontal plate (11) being fixedly connected to a connecting rod (13) via a hollow tube (12) arranged on an upper surface thereof, and the top end of the connecting rod (13) being connected to an external measuring device; A tip portion (2), the tip portion (2) comprising a tip body (21), the circumferential outer surface of the tip body (21) being slidably connected to the interior of the horizontal plate (11), the top end of the tip body (21) penetrating the horizontal plate (11) and extending into the hollow tube (12), the circumferential outer surface of the tip body (21) being sleeved with a circular plate (22), the upper surface of the circular plate (22) being provided with a return spring (23) connected to the lower surface of the horizontal plate (11); The horizontal plate (11) is mounted with a limit plate (15) via a coupling member (14) disposed on its lower surface, and the limit plate (15) is sleeved on the outer circumferential surface of the tip body (21), and the lower tip portion of the tip body (21) penetrates the limit plate (15) and extends to the outside.

2. A vertical probe assembly for effectively reducing contact resistance according to claim 1, characterized in that: The structure of the limiting plate (15) adopts a ring-shaped design, and the lower surface of the limiting plate (15) is fixedly connected to a suction plate (151).

3. A vertical probe assembly for effectively reducing contact resistance according to claim 1, characterized in that: The coupling member (14) comprises an external tube (141) and an internal rod (142); the top end of the external tube (141) is fixedly connected to the lower surface of the horizontal plate (11); the inner wall of the external tube (141) is slidably connected to the circumferential outer surface of the internal rod (142); and the bottom end of the internal rod (142) is fixedly connected to the upper surface of the limit plate (15).

4. A vertical probe assembly for effectively reducing contact resistance according to claim 3, characterized in that: The circumferential outer surface of the lower half of the inner connecting rod (142) is threaded, and the circumferential outer surface of the inner connecting rod (142) is threadedly connected to a threaded tooth block (143). The threaded tooth block (143) is rotatably mounted on a rotating seat (144) via a groove provided on its upper surface. A thin rod (145) is fixedly connected to the upper surface of the rotating seat (144). The external tube (141) is fixedly connected to the top end of the thin rod (145) via a ring block (146) provided on its circumferential outer surface.

5. A vertical probe assembly for effectively reducing contact resistance according to claim 4, characterized in that: The horizontal plate (11) is fixedly connected to an annular box (112) via a smooth rod (111) arranged on its lower surface; a toothed ring (113) meshing with a threaded tooth block (143) is rotatably mounted on the inner wall of the annular box (112); an elastic ring (114) is sleeved on the circumferential outer surface of the toothed ring (113), and the elastic ring (114) is located in a space enclosed by the annular box (112).

6. A vertical probe assembly for effectively reducing contact resistance according to claim 5, characterized in that: The elastic ring (114) adopts an open design, and a through hole matching the open end of the elastic ring (114) is provided on the circumferential outer surface of the annular box (112).

7. A vertical probe assembly for effectively reducing contact resistance according to claim 5, characterized in that: The outer circumferential surface of the smooth rod (111) is slidably connected to a ring plate (115), the lower surface of the ring plate (115) is provided with a strong spring (116) connected to the upper surface of the ring box (112), the outer circumferential surface of the ring plate (115) is fixedly connected to a locking ring (117) that slides with the outer circumferential surface of the thin rod (145), and the inner side surface of the locking ring (117) adopts a conical surface design, and the non-threaded outer circumferential surface of the inner connecting rod (142) is sleeved with a conical block (1421) that fits tightly with the inner wall of the locking ring (117).

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