A precision spring pin elastic force testing device

Abstract

The present invention relates to the field of elastic force testing technology, and provides an elastic force testing device for a precision spring needle, comprising a shell mechanism, a bearing mechanism, a testing mechanism, an adaptive opening and closing mechanism, and a centering mechanism. On the one hand, the present application can achieve the purpose of automatically feeding spring needles of different diameters between three arc plates by controlling the rotation angle of two arc plates. On the other hand, the three arc plates can achieve the purpose of centering, limiting, and unloading by radially moving and rotating 120 degrees with the spring needle as the axis. Since the three arc plates and the inclined plate are all inclined, one end of the needle tube of the spring needle can achieve the purpose of axially limiting one end of the spring needle by automatically abutting against a center pad. The first telescopic member is used to control the movement of the test contact and squeeze the needle end of the spring needle to complete the test. The device can automatically complete loading, centering, detection, and unloading according to the size of the spring needle, and has the characteristics of wide application range, reduced development costs, accurate detection, and easy use.

Description

Technical Field

[0001] The invention relates to the technical field of elastic force testing, and in particular to an elastic force testing device for a precision spring needle. Background Art

[0002] A spring pin is a spring-type probe consisting of three basic components: a pin shaft, a spring, and a pin tube. It is widely used in semiconductor devices to provide electrical connections. After the spring pin is assembled, it is necessary to use a spring force test device to perform a spring force test to ensure the consistency of the spring pin. Generally, multiple spring pins are placed in a test fixture, and then tested using a spring force test probe.

[0003] Since the spring pins have different models or uses, their diameter and length parameters will also be different. In order to improve the measurement accuracy, matching test fixtures are generally developed according to spring pins of different sizes. This will increase the cost of spring force testing on the one hand, and on the other hand, since the spring pins in the test fixture need to be manually placed and cannot be automatically placed, the work efficiency of spring force testing will be reduced. Summary of the invention

[0004] The object of the present invention is to provide a precision spring pin elastic force testing device, aiming to solve the problems existing when using the existing elastic force testing device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a precision spring pin elastic force testing device, comprising a housing mechanism and a bearing mechanism, wherein the housing mechanism comprises a material box, a loading housing, a tube shell and a unloading housing, wherein the loading housing is fixedly connected to the bottom of the material box, and the tube shell is fixedly connected between the loading housing and the unloading housing, wherein the bearing mechanism comprises a fixing ring and an inclined plate, wherein the material box and the fixing ring are both fixedly connected to the inclined plate, and further comprises:

[0006] A testing mechanism, the testing mechanism comprising a testing contact, a first telescopic member and a base plate, the first telescopic member being fixedly connected to the inclined plate, the base plate being fixedly connected to an end of the first telescopic member, and a testing contact being arranged on one side of the base plate;

[0007] An adaptive opening and closing mechanism, the adaptive opening and closing mechanism comprises an arc plate, an arc rack, a second telescopic member, a rack plate, a first transmission gear and a cantilever, the second telescopic member is fixedly connected to the material box, the upper part of the cantilever is fixedly connected to the second telescopic member, the rack plate is fixedly connected to the lower part of the cantilever, the first transmission gear is connected to the surface of the fixed ring, the two arc plates are movably connected to the fixed ring, the surface of the arc plate is fixedly connected with an arc rack, the two sides of the first transmission gear are respectively transmission-connected to the arc rack and the rack plate, and the inner wall of the tube shell is in sliding contact with the outer surface of the arc plate;

[0008] A centering mechanism, the centering mechanism comprises a driving assembly, a radial limiting assembly, a first shell and a second shell, the first shell and the second shell are respectively movably sleeved on the surfaces of two fixing rings, the driving assembly is mounted on the surface of the inclined plate, and the radial limiting assembly is located on the inner side of the arc plate, the surface of the first shell is fixedly connected with a third transmission gear, and the three arc plates are used to clamp the spring pin;

[0009] The radial limiting assembly includes an arc-shaped limiting plate, a transmission ring, a second transmission gear and a third screw. The transmission ring is movably sleeved on the surface of the first shell. The third screw is connected to the first shell. The second transmission gear is fixedly connected to the third screw. One end of the arc-shaped limiting plate is threadedly connected to the third screw. The other end of the arc-shaped limiting plate is slidably connected to the second shell. The third transmission gear and the transmission ring are both transmission-connected to the driving assembly. The second transmission gear is transmission-connected to the transmission ring.

[0010] As a further solution of the present invention, the driving assembly includes a driving motor, a driving shaft, a driving gear, a magnetic ring, an electromagnet, a reset spring, a key bar and a limit block. The driving motor is fixedly connected to the inclined plate, the driving shaft is connected to the driving motor, the driving gear is movably sleeved on the surface of the driving shaft, the surface of the driving shaft is provided with a key bar and a limit block, the surface of the driving gear is provided with a key slot, the key bar is slidably connected to the key slot, the electromagnet is fixedly connected to the end of the driving motor, the reset spring is connected between the electromagnet and the driving gear, and the surface of the driving gear is inlaid with a magnetic ring.

[0011] As a further solution of the present invention, after the electromagnet is energized, the electromagnet is magnetically bonded to the magnetic ring, and the third transmission gear is transmission connected to the driving gear; after the electromagnet is de-energized, the elastic force of the return spring drives the driving gear to contact the limit block, and the transmission ring is transmission connected to the driving gear.

[0012] As a further solution of the present invention, the shell mechanism also includes a partition plate, a first screw, a first threaded tube, a sliding rod, and a first knob. The two partition plates are located in the loading shell, the first threaded tube is fixedly connected to the surface of the loading shell, the first screw is threadedly connected in the first threaded tube, the partition plate and the first knob are respectively fixedly connected at both ends of the first screw, and several sliding rods are fixedly connected to the upper surface of the partition plate, and the sliding rods pass through the loading shell.

[0013] As a further solution of the present invention, the testing mechanism also includes a second screw, a second threaded tube and a second knob, the second threaded tube is fixedly connected to the substrate, the second screw is threadedly connected to the second threaded tube, and the test contact and the second knob are respectively fixedly connected to both ends of the second screw.

[0014] As a further solution of the present invention, the supporting mechanism also includes an arc-shaped keel, an annular guide rail and a base, the inclined plate is fixedly connected to the base, the two arc-shaped keels are fixedly connected between two fixed rings, the inner side of the arc-shaped plate is in sliding contact with the surface of the arc-shaped keel, the surface of the fixed ring is provided with an annular guide rail, and the two arc-shaped plates are both slidably connected in the annular guide rail.

[0015] As a further solution of the present invention, a central pad is provided on the surface of the second shell, and the inclined plate is inclined toward the second shell.

[0016] The beneficial effect of the present invention is that after the maximum diameter and maximum length parameters of the spring needle are input into the control panel, the structural design that cooperates with the testing mechanism, the adaptive opening and closing mechanism and the centering mechanism can, on the one hand, achieve the purpose of automatically sending spring needles of different diameters between the three arc plates by controlling the rotation angle of the two arc plates, and on the other hand, the three arc plates achieve the purpose of centering, limiting and unloading by moving radially and rotating 120 degrees with the spring needle as the axis. Since the three arc plates and the inclined plate are all inclined, one end of the needle tube of the spring needle automatically abuts against the center pad to achieve the purpose of axially limiting one end of the spring needle. The first telescopic part is used to control the movement of the test contact and squeeze the needle end of the spring needle to complete the test. The present application can automatically complete loading, centering, detection and unloading according to the size of the spring needle. Compared with the method of developing a matching fixture according to the size of the spring needle, it has the characteristics of wide application range, low development cost, accurate detection and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0018] Figure 2 An exploded view of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0019] Figure 3 It is a three-dimensional diagram of the housing structure of an embodiment of the present invention.

[0020] Figure 4 It is a planar cross-sectional view of the housing mechanism of an embodiment of the present invention.

[0021] Figure 5 It is a three-dimensional diagram of the carrying mechanism according to an embodiment of the present invention.

[0022] Figure 6 It is a three-dimensional diagram of the testing mechanism according to an embodiment of the present invention.

[0023] Figure 7 It is a three-dimensional diagram of the adaptive opening and closing mechanism according to an embodiment of the present invention.

[0024] Figure 8It is an exploded view of the centering mechanism according to an embodiment of the present invention.

[0025] Fig. 9 It is a three-dimensional diagram of a driving assembly according to an embodiment of the present invention.

[0026] Fig.10 It is a stereoscopic diagram of a radial limiting assembly according to an embodiment of the present invention.

[0027] Fig.11 A partial cross-sectional view of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0028] Fig.12 For the present invention Fig.11 A partial enlarged view of point a in the middle.

[0029] Fig.13 For the present invention Fig.11 A partial enlarged view of point b in the middle.

[0030] Fig.14 It is a first plane cross-sectional view of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0031] Fig.15 It is a second plane cross-sectional view of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0032] Fig.16 It is a third plane cross-sectional view of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0033] Fig.17 It is a fourth plane cross-sectional view of a precision spring pin elastic force testing device according to an embodiment of the present invention.

[0034] Figure numerals: 1-housing mechanism, 11-material box, 12-loading housing, 13-tube shell, 14-unloading housing, 15-partition plate, 16-first screw, 17-first threaded tube, 18-sliding rod, 19-first knob, 2-bearing mechanism, 21-fixing ring, 22-arc keel, 23-annular guide rail, 24-inclined plate, 25-base, 3-testing mechanism, 31-testing contact, 32-first telescopic member, 33-base plate, 34-second screw, 35-second threaded tube, 36-second knob, 4-adaptive opening and closing mechanism, 41-arc plate, 42-arc rack, 43-second telescopic member, 44-rack plate, 45-first transmission gear , 46-cantilever, 5-centering mechanism, 51-drive assembly, 511-drive motor, 512-drive shaft, 513-drive gear, 514-magnetic ring, 515-electromagnet, 516-reset spring, 517-key bar, 518-limit block, 52-radial limit assembly, 521-arc limit plate, 522-base, 523-transmission ring, 524-second transmission gear, 525-third screw, 53-first shell, 531-first guide rail, 532-third transmission gear, 533-center hole, 54-second shell, 541-center pad, 542-second guide rail, 543-limit rod, 6-spring pin, 7-control panel. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0037] See also Figures 1 to 17 In one embodiment of the present invention, a precision spring needle elastic force testing device includes a housing mechanism 1, a bearing mechanism 2 and a control panel 7. The housing mechanism 1 includes a material box 11, a loading housing 12, a tube shell 13 and a unloading housing 14. The loading housing 12 is fixedly connected to the bottom of the material box 11. The tube shell 13 is fixedly connected between the loading housing 12 and the unloading housing 14. The bearing mechanism 2 includes a fixing ring 21 and an inclined plate 24. The material box 11 and the fixing ring 21 are both fixedly connected to the inclined plate 24. The control panel 7 is installed on the surface of the material box 11, and also includes:

[0038] The testing mechanism 3 includes a testing contact 31, a first telescopic member 32 and a base plate 33. The first telescopic member 32 is fixedly connected to the inclined plate 24. The base plate 33 is fixedly connected to the end of the first telescopic member 32. The testing contact 31 is provided on one side of the base plate 33.

[0039] The adaptive opening and closing mechanism 4 includes an arc plate 41, an arc rack 42, a second telescopic member 43, a rack plate 44, a first transmission gear 45 and a cantilever 46. The second telescopic member 43 is fixedly connected to the material box 11, the upper part of the cantilever 46 is fixedly connected to the second telescopic member 43, the rack plate 44 is fixedly connected to the lower part of the cantilever 46, the first transmission gear 45 is connected to the surface of the fixed ring 21, the two arc plates 41 are movably connected to the fixed ring 21, the surface of the arc plate 41 is fixedly connected with an arc rack 42, the two sides of the first transmission gear 45 are respectively connected to the arc rack 42 and the rack plate 44, and the inner wall of the tube shell 13 is in sliding contact with the outer surface of the arc plate 41;

[0040] The centering mechanism 5 comprises a driving assembly 51, a radial limiting assembly 52, a first shell 53 and a second shell 54. The first shell 53 and the second shell 54 are respectively movably sleeved on the surfaces of the two fixing rings 21. The inclined plate 24 is inclined toward the second shell 54. The driving assembly 51 is mounted on the surface of the inclined plate 24, and the radial limiting assembly 52 is located on the inner side of the arc plate 41. The surface of the first shell 53 is fixedly connected with a third transmission gear 532. The surface of the second shell 54 is provided with a center pad 541. The three arc plates 41 are used to clamp the spring pin 6. The surfaces of the first shell 53 and the second shell 54 are respectively provided with a first guide rail 531 and a second guide rail 542. The second guide rail 542 is fixedly connected with a limiting rod 543. The surface of the first shell 53 is provided with a center hole 533. The test contact 31 passes through the center hole 533.

[0041] The radial limiting assembly 52 comprises an arc-shaped limiting plate 521, a base 522, a transmission ring 523, a second transmission gear 524 and a third screw 525. The transmission ring 523 is movably sleeved on the surface of the first shell 53. The third screw 525 is connected to the first shell 53. The second transmission gear 524 is fixedly connected to the third screw 525. One end of the arc-shaped limiting plate 521 is threadedly connected to the third screw 525. The other end of the arc-shaped limiting plate 521 is slidably connected to the second shell 54. The third transmission gear 532 and the transmission ring 523 are both transmission-connected to the driving assembly 51. The second transmission gear 524 is transmission-connected to the transmission ring 523. Both ends of the arc-shaped limiting plate 521 are fixedly connected to the base 522. The third screw 525 is installed in the first guide rail 531. One base 522 is threadedly connected to the third screw 525. The other base 522 is slidably connected to the limiting rod 543.

[0042] See also Figure 1 , Figure 5 and Fig.11Furthermore, the supporting mechanism 2 also includes an arc-shaped keel 22, an annular guide rail 23 and a base 25, the inclined plate 24 is fixedly connected to the base 25, the two arc-shaped keels 22 are fixedly connected between the two fixing rings 21, the inner side of the arc plate 41 is in sliding contact with the surface of the arc-shaped keel 22, the surface of the fixing ring 21 is provided with an annular guide rail 23, and the two arc-shaped plates 41 are both slidably connected in the annular guide rail 23.

[0043] In the embodiment of the present invention, the first telescopic member 32 and the second telescopic member 43 are both electric telescopic rods, and the control panel 7 is used to control the telescopic length parameter of the electric telescopic rod according to the maximum diameter of the spring pin 6 .

[0044] See also Figure 1 , Fig. 9 and Fig.12 In one embodiment of the present invention, the driving assembly 51 includes a driving motor 511, a driving shaft 512, a driving gear 513, a magnetic ring 514, an electromagnet 515, a return spring 516, a key bar 517 and a limit block 518. The driving motor 511 is fixedly connected to the inclined plate 24, the driving shaft 512 is connected to the driving motor 511, the driving gear 513 is movably sleeved on the surface of the driving shaft 512, the surface of the driving shaft 512 is provided with a key bar 517 and a limit block 518, the surface of the driving gear 513 is provided with a key slot, the key bar 517 is slidably connected to the key slot, the electromagnet 515 is fixedly connected to the end of the driving motor 511, the return spring 516 is connected between the electromagnet 515 and the driving gear 513, and the surface of the driving gear 513 is inlaid with a magnetic ring 514.

[0045] In the embodiment of the present invention, after the control panel 7 controls the electromagnet 515 to be energized, the electromagnet 515 is magnetically bonded to the magnetic ring 514, and the third transmission gear 532 is transmission-connected to the driving gear 513. After the control panel 7 controls the electromagnet 515 to be deenergized, the elastic force of the return spring 516 drives the driving gear 513 to contact the limit block 518, and the transmission ring 523 is transmission-connected to the driving gear 513.

[0046] See also Figure 3 , Figure 4 and Fig.15 In one embodiment of the present invention, the shell mechanism 1 also includes a partition plate 15, a first screw 16, a first threaded tube 17, a slide rod 18, and a first knob 19. The two partition plates 15 are located in the loading shell 12, the first threaded tube 17 is fixedly connected to the surface of the loading shell 12, the first screw 16 is threadedly connected in the first threaded tube 17, the partition plate 15 and the first knob 19 are respectively fixedly connected at both ends of the first screw 16, and a plurality of slide rods 18 are fixedly connected to the upper surface of the partition plate 15, and the slide rod 18 passes through the loading shell 12.

[0047] In the embodiment of the present invention, based on the maximum diameter parameter of the spring needle 6, the first knob 19 is used to rotate the first screw 16 in the first threaded tube 17. Due to the limiting effect of the slide bar 18, the two partition plates 15 can make linear motion until the spacing between the two partition plates 15 is no more than twice the maximum diameter of the spring needle 6. Scale lines are provided on the surface of the slide bar 18 to facilitate the staff to control the moving distance of the partition plate 15. The slide bar 18 in the material box 11 also plays a role in supporting the spring needle 6.

[0048] See also Figure 6 , Fig.11 and Fig.12 In one embodiment of the present invention, the testing mechanism 3 also includes a second screw 34, a second threaded tube 35 and a second knob 36. The second threaded tube 35 is fixedly connected to the base plate 33. The second screw 34 is threadedly connected to the second threaded tube 35. The test contact 31 and the second knob 36 are respectively fixedly connected to both ends of the second screw 34.

[0049] In the embodiment of the present invention, based on the length parameter of the spring needle 6, the second screw 34 is rotated by the second knob 36 to adjust the distance between the test contact 31 and the center pad 541. Since the three arc plates 41 and the inclined plate 24 are all inclined, one end of the needle tube of the spring needle 6 automatically abuts against the center pad 541 to achieve the purpose of axially limiting one end of the spring needle 6. When one end of the spring needle 6 is limited, it is convenient to accurately control the position and pressing distance of the test contact 31 according to the length of the spring needle, thereby accurately obtaining the elastic force parameters at the same pressing distance.

[0050] Working principle: First, input the maximum diameter and maximum length parameters of the spring needle 6 into the control panel 7. Based on the maximum diameter parameter of the spring needle 6, use the first screw 16 to adjust the distance between the two partition plates 15, so that the distance between the two partition plates 15 is not greater than 2 times the maximum diameter of the spring needle 6, to prevent the two spring needles 6 from being arranged in parallel in the feeding shell 12 or above the arc plate 41, causing the material to be stuck. It should be noted that the spring needle 6 placed in the material box 11 has its needle tube end facing the direction of the central pad 541;

[0051] Reference Fig.15 In the initial state, one of the arc plates 41 is located directly below the loading housing 12, and then the control panel 7 controls the second telescopic member 43 to drive the two rack plates 44 to rise and fall a certain distance, and the two rack plates 44 respectively drive the two arc plates 41 to rotate in opposite directions along the annular guide rail 23 through the two arc racks 42 until the distance between the two arc plates 41 is greater than the maximum diameter of the spring pin 6 or only one spring pin 6 is allowed to pass through, and when the spring pin 6 falls, refer to the attached Fig.16, the control panel 7 controls the second telescopic member 43 and the two arc-shaped plates 41 to reset, controls the electromagnet 515 to cut off the power, and controls the driving motor 511 to start. After the electromagnet 515 is cut off, the elastic force of the reset spring 516 drives the driving gear 513 to contact the limit block 518, and the transmission ring 523 is connected to the driving gear 513 in transmission. Therefore, when the driving motor 511 controls the driving gear 513 to rotate through the driving shaft 512 and the key bar 517, the rotating driving gear 513 controls the third screw 525 to rotate through the transmission ring 523 and the second transmission gear 524. The rotating third screw 525 drives the three arc-shaped plates 41 to make radial movement through the base 522 until the three arc-shaped plates 41 adjust the axis of the spring needle 6 to coincide with or align with the axis of the center hole 533 and stop. Since the three arc-shaped plates 41 and the inclined plate 24 are all inclined, one end of the needle tube of the spring needle 6 will abut the center pad 541, thereby completing the center positioning of the spring needle 6;

[0052] Next, based on the length parameter of the spring needle 6, the second screw 34 is used to adjust the distance between the test contact 31 and the central pad 541, and the control panel 7 controls the first telescopic member 32 to drive the test contact 31, the substrate 33 and the second screw 34 to move. The test contact 31 and the second screw 34 enter between the three arc plates 41 through the central hole 533. When the test contact 31 contacts one end of the needle of the spring needle 6 and presses the needle to obtain the elastic force parameter, after the test is completed, refer to the attached figure. Fig.17 After the control panel 7 controls the first telescopic member 32 and the test contact 31 to reset, the electromagnet 515 is first controlled to be energized. After the electromagnet 515 is energized, the electromagnet 515 is magnetically attached to the magnetic ring 514, and the third transmission gear 532 is connected to the driving gear 513. Therefore, when the driving motor 511 controls the driving gear 513 to rotate, the rotating driving gear 513 controls the radial limit assembly 52, the first shell 53 and the second shell 54 to rotate 120 degrees through the third transmission gear 532. During this process, the electromagnet 515 is controlled to be powered off, and the driving motor 511 and the driving gear 513 are used again to control the three arc plates 41 to move radially to release the spring needle 6. The spring needle 6 automatically completes the unloading from the unloading shell 14. Finally, the electromagnet 515 is controlled to be energized again, so as to control the radial limit assembly 52, the first shell 53 and the second shell 54 to rotate 120 degrees in the opposite direction to reset. This rotation is repeated to achieve the function of automatically and accurately detecting spring needles 6 of different sizes.

[0053] In summary, after the maximum diameter and maximum length parameters of the spring needle 6 are input into the control panel 7, the structural design coordinated with the testing mechanism 3, the adaptive opening and closing mechanism 4 and the centering mechanism 5 can be used to automatically feed the spring needles 6 of different diameters between the three arc plates 41 by controlling the rotation angle of the two arc plates 41. On the other hand, the three arc plates 41 can achieve the purpose of centering, limiting and unloading by moving radially and rotating 120 degrees with the spring needle 6 as the axis. Since the three arc plates 41 and the inclined plate 24 are all inclined, one end of the needle tube of the spring needle 6 automatically abuts against the center pad 541 to achieve the purpose of axially limiting one end of the spring needle 6. The first telescopic member 32 is used to control the movement of the test contact 31 and squeeze the needle end of the spring needle 6 to complete the test. The present application can automatically complete loading, centering, detection and unloading according to the size of the spring needle 6. Compared with the method of developing a matching fixture according to the size of the spring needle 6, it has the characteristics of wide application range, low development cost, accurate detection and easy use.

[0054] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the main purpose of the invention.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A precision spring needle elastic force testing device, comprising a housing mechanism (1) and a bearing mechanism (2), wherein the housing mechanism (1) comprises a material box (11), a loading housing (12), a tube shell (13) and a unloading housing (14), wherein the loading housing (12) is fixedly connected to the lower part of the material box (11), and the tube shell (13) is fixedly connected between the loading housing (12) and the unloading housing (14), and the bearing mechanism (2) comprises a fixing ring (21) and an inclined plate (24), wherein the material box (11) and the fixing ring (21) are both fixedly connected to the inclined plate (24), and wherein: Also includes: A testing mechanism (3), the testing mechanism (3) comprising a testing contact (31), a first telescopic member (32) and a base plate (33), the first telescopic member (32) being fixedly connected to the inclined plate (24), the base plate (33) being fixedly connected to an end of the first telescopic member (32), and the testing contact (31) being arranged on one side of the base plate (33); An adaptive opening and closing mechanism (4), the adaptive opening and closing mechanism (4) comprising an arc-shaped plate (41), an arc-shaped rack (42), a second telescopic member (43), a rack plate (44), a first transmission gear (45) and a cantilever (46), the second telescopic member (43) being fixedly connected to the material box (11), the upper part of the cantilever (46) being fixedly connected to the second telescopic member (43), the rack plate (44) being fixedly connected to the lower part of the cantilever (46), the first transmission gear (45) being connected to the surface of a fixed ring (21), the two arc-shaped plates (41) being movably connected to the fixed ring (21), the surface of the arc-shaped plate (41) being fixedly connected with an arc-shaped rack (42), the two sides of the first transmission gear (45) being respectively transmission-connected to the arc-shaped rack (42) and the rack plate (44), and the inner wall of the tube shell (13) being in sliding contact with the outer surface of the arc-shaped plate (41); A centering mechanism (5), the centering mechanism (5) comprising a driving assembly (51), a radial limiting assembly (52), a first housing (53) and a second housing (54), the first housing (53) and the second housing (54) being respectively movably sleeved on the surfaces of two fixing rings (21), the driving assembly (51) being mounted on the surface of the inclined plate (24), and the radial limiting assembly (52) being located on the inner side of the arc plate (41), the surface of the first housing (53) being fixedly connected with a third transmission gear (532), and the three arc plates (41) being used for clamping the spring pin (6); The radial limiting assembly (52) comprises an arc-shaped limiting plate (521), a transmission ring (523), a second transmission gear (524) and a third screw (525); the transmission ring (523) is movably sleeved on the surface of the first shell (53); the third screw (525) is connected to the first shell (53); the second transmission gear (524) is fixedly connected to the third screw (525); one end of the arc-shaped limiting plate (521) is threadedly connected to the third screw (525); the other end of the arc-shaped limiting plate (521) is slidably connected to the second shell (54); the third transmission gear (532) and the transmission ring (523) are both transmission-connected to the driving assembly (51); and the second transmission gear (524) is transmission-connected to the transmission ring (523); The driving assembly (51) comprises a driving motor (511), a driving shaft (512), a driving gear (513), a magnetic ring (514), an electromagnet (515), a reset spring (516), a key bar (517) and a limit block (518); the driving motor (511) is fixedly connected to the inclined plate (24); the driving shaft (512) is connected to the driving motor (511); the driving gear (513) is movably sleeved on the surface of the driving shaft (512); the surface of the driving shaft (512) is provided with a key bar (517) and a limit block (518); the surface of the driving gear (513) is provided with a key slot; the key bar (517) is slidably connected to the key slot; the electromagnet (515) is fixedly connected to the end of the driving motor (511); the reset spring (516) is connected between the electromagnet (515) and the driving gear (513); and the surface of the driving gear (513) is inlaid with a magnetic ring (514); When the electromagnet (515) is powered on, the electromagnet (515) and the magnetic ring (514) are magnetically attached, and the third transmission gear (532) is transmission-connected to the driving gear (513); when the electromagnet (515) is powered off, the elastic force of the return spring (516) drives the driving gear (513) to contact the limit block (518), and the transmission ring (523) is transmission-connected to the driving gear (513).

2. The elastic force testing device of a precision spring pin according to claim 1, characterized in that: The housing mechanism (1) further comprises a partition plate (15), a first screw rod (16), a first threaded tube (17), a slide rod (18), and a first knob (19); the two partition plates (15) are located in the feeding housing (12); the first threaded tube (17) is fixedly connected to the surface of the feeding housing (12); the first screw rod (16) is threadedly connected in the first threaded tube (17); the partition plate (15) and the first knob (19) are respectively fixedly connected to the two ends of the first screw rod (16); a plurality of slide rods (18) are fixedly connected to the upper surface of the partition plate (15); and the slide rod (18) passes through the feeding housing (12).

3. The elastic force testing device of a precision spring pin according to claim 2, characterized in that: The testing mechanism (3) further comprises a second screw rod (34), a second threaded tube (35) and a second knob (36); the second threaded tube (35) is fixedly connected to the base plate (33); the second screw rod (34) is threadedly connected to the second threaded tube (35); and the testing contact (31) and the second knob (36) are respectively fixedly connected to both ends of the second screw rod (34).

4. The elastic force testing device of a precision spring pin according to claim 1, characterized in that: The bearing mechanism (2) further comprises an arcuate keel (22), an annular guide rail (23) and a base (25); the inclined plate (24) is fixedly connected to the base (25); the two arcuate keels (22) are fixedly connected between two fixing rings (21); the inner side of the arcuate plate (41) is in sliding contact with the surface of the arcuate keel (22); the surface of the fixing ring (21) is provided with an annular guide rail (23); and the two arcuate plates (41) are both slidably connected in the annular guide rail (23).

5. The elastic force testing device of a precision spring pin according to claim 1, characterized in that: A central cushion block (541) is provided on the surface of the second shell (54), and the inclined plate (24) is inclined towards the second shell (54).

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