A vertical probe assembly for effectively reducing contact resistance

Abstract

The present invention relates to the field of probe technology, and discloses a vertical probe assembly that effectively reduces contact resistance, including a connection part. The connection part includes a horizontal plate, and the horizontal plate is fixedly connected with a connecting rod through a hollow tube arranged on its upper surface, and the top end of the connecting rod is connected to an external measuring device. A tip part, the tip part includes a tip body, and the circumferential outer surface of the tip body is slidably connected to the inside of the horizontal plate. This vertical probe assembly that effectively reduces contact resistance can effectively solve the problems in the prior art that the design and manufacture of vertical probes require high precision to ensure that the resistance to the contact surface is as small as possible, and the tip is sharp and slender to achieve a high contact pressure with the contact surface. Since the tip of the probe is very delicate, during the test process, if the pressure applied by the tip of the probe to the surface of the object to be measured is too large, it may cause surface damage or scratches.

Description

Technical Field

[0001] The present invention relates to the technical field of probes, and particularly to a vertical probe assembly that effectively reduces contact resistance. Background Art

[0002] A vertical probe is an electronic test device, usually used in semiconductor testing, circuit board testing, integrated circuit (IC) testing, and other occasions 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. This design 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 to the contact surface is as small as possible, thereby improving the efficiency and accuracy of signal transmission. Generally, materials with high electrical 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 needs to be very fine, with a sharp and slender tip to achieve a high contact pressure between the tip and the contact surface, thereby reducing the contact area and resistance to ensure that it can accurately contact very small test points. Since the tip of the probe is very fine, during the test process, if the pressure applied by the tip of the probe to the surface of the object to be tested is too large, it may cause surface damage or scratches. Summary of the Invention

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a vertical probe assembly that effectively reduces contact resistance, which can effectively solve the problems in the prior art that the design and manufacture of vertical probes require high precision to ensure that the resistance to the contact surface is as small as possible, with a sharp and slender tip to achieve a high contact pressure between the tip and the contact surface. Since the tip of the probe is very fine, during the test process, if the pressure applied by the tip of the probe to the surface of the object to be tested is too large, it may cause surface damage or scratches.

[0006] Technical Solution

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] The present invention provides a vertical probe assembly that effectively reduces contact resistance, including:

[0009] A connection part, the connection part includes a horizontal plate, the horizontal plate is fixedly connected with a connecting rod through a hollow tube arranged on its upper surface, and the top of the connecting rod is connected to an external measuring device;

[0010] The tip part, the tip part includes a tip body, the circumferential outer surface of the tip body is slidably connected to the inside of the horizontal plate, the top of the tip body penetrates through the horizontal plate and extends into the hollow tube, a circular plate is sleeved on the circumferential outer surface of the tip body, and a return spring connected to the lower surface of the horizontal plate is arranged on the upper surface of the circular plate;

[0011] Wherein, the horizontal plate is provided with a limiting plate through a connecting piece arranged on its lower surface, and the limiting plate is sleeved on the circumferential outer surface of the tip body, and the lower tip part of the tip body penetrates through the limiting plate and extends to the outside.

[0012] Further, the structure of the limiting plate is designed in a ring shape, and a suction plate is fixedly connected to the lower surface of the limiting plate.

[0013] Further, the connecting piece includes an outer connecting pipe and an inner connecting rod, the top of the outer connecting pipe is fixedly connected to the lower surface of the horizontal plate, the inner wall of the outer connecting pipe is slidably connected to the circumferential outer surface of the inner connecting rod, and the bottom end of the inner connecting rod is fixedly connected to the upper surface of the limiting plate.

[0014] Further, the circumferential outer surface of the lower half of the inner connecting rod is designed with threads, a threaded tooth block is threadedly connected to the circumferential outer surface of the inner connecting rod, a rotating seat is rotatably installed on the threaded tooth block through a groove opened on its upper surface, a thin rod is fixedly connected to the upper surface of the rotating seat, and the outer connecting pipe is fixedly connected to the top end of the thin rod through a ring block arranged on its circumferential outer surface.

[0015] Further, the horizontal plate is fixedly connected to an annular box through a smooth rod arranged on its lower surface, a toothed ring meshing with the threaded tooth block is rotatably installed on the inner wall of the annular box, and an elastic ring is sleeved on the circumferential outer surface of the toothed ring, and the elastic ring is located in the space surrounded by the annular box.

[0016] Further, the elastic ring is designed in an open type, and a through hole adapted to the open end of the elastic ring is opened on the circumferential outer surface of the annular box.

[0017] Further, a ring plate is slidably connected to the circumferential outer surface of the smooth rod, a strong spring connecting the ring plate to the upper surface of the annular box is arranged on the lower surface of the ring plate, a locking ring sliding on the circumferential outer surface of the thin rod is fixedly connected to the circumferential outer surface of the ring plate, and the inner side surface of the locking ring is designed with a conical surface, and a conical block closely fitting the inner wall of the locking ring is sleeved on the non-threaded circumferential outer surface of the inner connecting rod. Beneficial effects

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0019] The present invention is provided with a limiting plate. During use, the tip body first contacts the part to be measured. As the external measuring device moves downward, it drives the connecting rod, the hollow tube, the horizontal plate, the coupling member, the limiting plate, and the suction plate to move downward synchronously. At the same time, the tip body begins to compress the return spring until the lower surface of the suction plate closely adheres to the surface to be measured. The limiting plate is used to control the test pressure of the tip body. On the premise that the return 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, it can improve the vertical accuracy of the tip body and the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the front view of the embodiment of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the three-dimensional view of the embodiment of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the three-dimensional multi-angle view of the embodiment of the present invention;

[0024] Figure 4 For the embodiment of the present invention Figure 3 It is a schematic structural diagram of the partial enlargement at A in the embodiment;

[0025] Figure 5 It is a schematic structural diagram of the three-dimensional separation of the embodiment of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the three-dimensional separation of the connecting part of the embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the three-dimensional view of the inner connecting rod, the threaded tooth block, and the tooth ring of the embodiment of the present invention.

[0028] The reference numerals in the figure respectively represent: 1. connecting part; 11. horizontal plate; 111. smooth rod; 112. annular box; 113. toothed ring; 114. elastic ring; 115. ring plate; 116. strong spring; 117. locking ring; 12. hollow tube; 13. connecting rod; 14. coupling part; 141. external connecting tube; 142. internal connecting rod; 1421. tapered block; 143. threaded tooth block; 144. rotating seat; 145. thin rod; 146. ring block; 15. limiting plate; 151. attracting plate; 2. pointed end part; 21. pointed end body; 22. round plate; 23. reset spring. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The present invention will be further described below with reference to the embodiments. Embodiment

[0031] Please refer to Figures 1-7 , the present invention provides a technical solution: a vertical probe assembly for effectively reducing contact resistance, comprising:

[0032] Connecting part 1, the connecting part 1 includes a horizontal plate 11, the horizontal plate 11 is fixedly connected with a connecting rod 13 through a hollow tube 12 arranged on its upper surface, and the top end of the connecting rod 13 is connected to an external measuring device;

[0033] Pointed end part 2, the pointed end part 2 includes a pointed end body 21, the circumferential outer surface of the pointed end body 21 is slidably connected to the inside of the horizontal plate 11, the top end of the pointed end body 21 penetrates through the horizontal plate 11 and extends into the hollow tube 12, a round plate 22 is sleeved on the circumferential outer surface of the pointed end body 21, and a reset spring 23 connected to the lower surface of the horizontal plate 11 is arranged on the upper surface of the round plate 22;

[0034] Wherein, the horizontal plate 11 is provided with a limiting plate 15 through a coupling part 14 arranged on its lower surface, and the limiting plate 15 is sleeved on the circumferential outer surface of the pointed end body 21, and the lower pointed part of the pointed end body 21 penetrates through the limiting plate 15 and extends to the outside.

[0035] The structure of the limiting plate 15 adopts an annular design, and an attracting plate 151 is fixedly connected to the lower surface of the limiting plate 15.

[0036] The coupling member 14 includes an outer connecting pipe 141 and an inner connecting rod 142. The top end of the outer connecting pipe 141 is fixedly connected to the lower surface of the horizontal plate 11. The inner wall of the outer connecting pipe 141 is slidably connected to the circumferential outer surface of the inner connecting rod 142. The bottom end of the inner connecting rod 142 is fixedly connected to the upper surface of the limiting plate 15.

[0037] The circumferential outer surface of the lower half of the inner connecting rod 142 is designed with threads. A threaded tooth block 143 is threadedly connected to the circumferential outer surface of the inner connecting rod 142. A rotating seat 144 is rotatably installed on the threaded tooth block 143 through a groove opened on its upper surface. A thin rod 145 is fixedly connected to the upper surface of the rotating seat 144. The outer connecting pipe 141 is fixedly connected to the top end of the thin rod 145 through a ring block 146 provided on its circumferential outer surface.

[0038] The horizontal plate 11 is fixedly connected to an annular box 112 through a smooth rod 111 provided on its lower surface. A tooth ring 113 meshing with the threaded tooth 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 tooth ring 113, and the elastic ring 114 is located in the space enclosed by the annular box 112.

[0039] The elastic ring 114 is designed in an open type. A through hole adapted to the open end of the elastic ring 114 is opened on the circumferential outer surface of the annular box 112.

[0040] A ring plate 115 is slidably connected to the circumferential outer surface of the smooth rod 111. A strong spring 116 connecting the lower surface of the ring plate 115 to the upper surface of the annular box 112 is provided. A locking ring 117 slidable on the circumferential outer surface of the thin rod 145 is fixedly connected to the circumferential outer surface of the ring plate 115, and the inner side surface of the locking ring 117 is designed with a conical surface. A conical block 1421 closely fitting the inner wall of the locking ring 117 is sleeved on the non-threaded circumferential outer surface of the inner connecting rod 142.

[0041] Reference Figures 1-7 , the design and manufacture of vertical probes require high precision to ensure that the resistance to the contact surface is as small as possible, thereby improving the efficiency and accuracy of signal transmission. A sharp and slender tip is used to achieve a high contact pressure between the probe and the contact surface, thereby reducing the contact area and resistance to ensure that it can accurately contact very small test points. Since the tip of the probe is very delicate, during the test process, if the pressure applied by the tip of the probe to the surface of the object to be tested is too large, it may cause surface damage or scratches;

[0042] To overcome the above-mentioned defects, the present invention designs a vertical probe assembly that can effectively reduce the contact resistance.

[0043] Probe testing process:

[0044] When testing the circuit nodes, component pins, and contact points of a circuit board, first ensure that the tip surface of the probe is smooth, clean, free of oxide layers or other contaminants. Then, after the external measuring device is calibrated, the tip body 21 on the tip 2 starts the test. 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 part of the tip body 21 is designed to be sharp and slender to achieve a high contact pressure with the contact surface, thereby reducing the contact area and resistance. At the same time, the reaction force of the part to be tested will drive the tip body 21 to slide upward inside the horizontal plate 11, driving the further compression of the return spring 23 to buffer it.

[0045] To avoid damage or scratching of the tip part of the tip body 21 to the surface to be tested, this application is provided with a limit plate 15 for controlling the contact pressure of the tip body 21, so that the test pressure of the tip body 21 always remains at a constant value, thus avoiding problems such as damage or scratching of the tip part of the tip body 21 to the surface to be tested. During use, the tip body 21 first contacts the part to be tested. As the external measuring device moves downward, it drives the connecting rod 13, the hollow tube 12, the horizontal plate 11, the coupling member 14, the limit plate 15, and the suction plate 151 to move downward synchronously. At the same time, the tip body 21 starts to compress the return spring 23 until the lower surface of the suction plate 151 is closely attached to the surface to be tested. To sum up, for the efficiency and accuracy of signal transmission, the tip part of the tip body 21 needs to be made sharp and slender to reduce the contact area and resistance. At the same time, this application is also provided with a limit plate 15 for controlling the test pressure of the tip body 21 (under the premise that the return 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 attached to 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, and avoid the tip body 21 deviating during the test, affecting the test accuracy.

[0046] Probe test pressure adjustment process:

[0047] During the test of the tip body 21, for different surfaces of the objects to be tested, the required test pressures are different. Appropriate pressure is used to ensure good contact between the tip body 21 and the contact surface, avoiding an increase in resistance caused by excessive or insufficient pressure. Furthermore, it is achieved by adjusting the distance between the lower surface of the suction plate 151 and the lowest point of the tip body 21.

[0048] Initially, under the action of its own elastic force, the elastic ring 114 is in an automatically stretched state, and there is no close fit between the inner side surface of the elastic ring 114 and the tooth ring 113 (the elastic ring 114 can rotate freely). When the heights of the limit plate 15 and the suction plate 151 need to be adjusted, the operator holds the open end of the elastic ring 114 with both hands, and the inner side surface of the elastic ring 114 begins to closely fit with the circumferential outer surface of the tooth ring 113 (the joint surface can be designed in a rough manner), and the two are combined into a whole. Rotating the elastic ring 114 drives the tooth ring 113 to rotate inside the annular box 112, and the tooth ring 113 drives the four threaded tooth blocks 143 to rotate synchronously around the rotating seat 144. Since the smooth parts of the four inner connecting rods 142 all extend into the outer connecting pipe 141, during the rotation of the four threaded tooth blocks 143, they will drive their corresponding inner connecting rods 142 to move up and down synchronously, driving the limit plate 15 and the suction plate 151 to move up and down smoothly synchronously.

[0049] As can be seen from the above, the connecting part 1 has the following advantages:

[0050] Advantage 1: By driving the tooth ring 113 to rotate through the elastic ring 114, driving the four threaded tooth blocks 143 to rotate synchronously around the rotating seat 144, and driving the inner connecting rods 142, the limit plate 15, and the suction plate 151 to move up and down synchronously, the test pressure of the tip body 21 is adjusted.

[0051] Advantage 2: Since the four inner connecting rods 142 move up and down synchronously, the limit plate 15 and the suction plate 151 can move horizontally up and down smoothly, ensuring the vertical accuracy of the subsequent tip body 21.

[0052] Advantage 3: Under the action of its own elastic force, initially, there is no close fit between the inner side surface of the elastic ring 114 and the tooth ring 113. After the rotation adjustment of the elastic ring 114 is completed and the adjustment distance does not reach the predetermined value, the elastic ring 114 can be quickly separated. By repeatedly locking the tooth ring 113 and rotating it until the adjustment distance reaches the predetermined value.

[0053] During the long-term test, to prevent the inner connecting rod 142 from axially moving, which affects 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. A conical block 1421 is sleeved on the circumferential outer surface of the inner connecting rod 142, and the conical surface is in close fit with the locking ring 117, which can prevent the inner connecting rod 142 and the conical block 1421 from axially moving. When the height of the inner connecting rod 142 needs to be adjusted, just press two parts of the ring plate 115 with two fingers to drive the separation between the locking ring 117 and the conical block 1421.

[0054] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and 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 part (1), the connecting part (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 installed with a limit plate (15) via a coupling member (14) arranged 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; 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); the bottom end of the internal rod (142) is fixedly connected to the upper surface of the limiting plate (15); the circumferential outer surface of the lower half of the internal rod (142) is threaded; the circumferential outer surface of the internal rod (142) is threadedly connected to a threaded tooth block (143); the threaded tooth block (143) is rotatably mounted on a rotating seat (144) through a groove provided on its upper surface; the upper surface of the rotating seat (144) is fixedly connected to a thin rod (145); the external tube (141) is fixedly connected to the top end of the thin rod (145) through a ring block (146) provided on its circumferential outer surface.

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 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 the space enclosed by the annular box (112).

4. A vertical probe assembly for effectively reducing contact resistance according to claim 3, characterized in that: The elastic ring (114) is of 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).

5. A vertical probe assembly for effectively reducing contact resistance according to claim 3, 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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