Device for testing holding force of contact of connector

Abstract

The embodiment of the invention discloses a holding force testing device for a contact element of a connector, which comprises a machine body, a clamp and a testing assembly, and is characterized in that the clamp comprises a rotatable first supporting part, a second supporting part mounted on the machine body and at least three clamping jaws pivotally mounted on the second supporting part; the clamping surfaces of the clamping jaws define a clamping cavity, when the first supporting part rotates relative to the second supporting part, the at least three clamping jaws synchronously rotate to expand or shrink the clamping cavity, and the testing assembly is arranged on the machine body and comprises a testing head with a testing probe; the test assembly is movable relative to the body along a first direction, a second direction, and a third direction which are orthogonal to each other so that the test probe is aligned, contacted, and separated from a predetermined contact of the connector. According to the testing device, the clamping force is large, the size change range of the clamping cavity is large, automatic centering can be achieved, and the applicability is good.

Description

Technical Field

[0001] The invention belongs to the technical field of connector testing, and in particular relates to a holding force testing device for a contact piece of a connector. Background Art

[0002] Connectors are usually used to connect wire harnesses. The size of connectors varies greatly, and the outer dimensions and coordinate distribution of connector contacts are different. The retention force of connector contacts is an important performance indicator of connectors. If the retention force is insufficient, it will lead to poor contact or even disconnection. Therefore, it is necessary to test the retention force of the metal contacts of the connector.

[0003] In the related art, the retention force test device of the connector contact piece usually uses a three-jaw chuck, a six-jaw chuck, a drill chuck and a double V-block clamp to clamp the connector, but the gap between the clamping elements of such a clamp is very large, and the connector is prone to clamping and getting stuck during use. Especially when the size of the connector is small, the connector is easy to get stuck between the clamping elements, and manual operation is required for secondary clamping, which may damage the connector in serious cases. In addition, the clamping cavity size (cross-sectional area) range of some clamps in the related art varies little, and cannot be applied to situations where the size of the connector varies greatly, and the applicability is poor. In addition, the clamping force of the clamp is small, and the clamping elements are prone to wear after a period of use, resulting in reduced clamping accuracy. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a device for testing the retention force of a contact of a connector, which has a large clamping force, a large range of clamping cavity size variations, and good applicability.

[0006] A device for testing the retention force of a contact of a connector according to an embodiment of the present invention comprises:

[0007] Body;

[0008] A clamp, the clamp comprising a first supporting member, a second supporting member and at least three clamping jaws, the second supporting member being mounted on the machine body, the first supporting member being connected to the second supporting member and being rotatable relative to the second supporting member, the first supporting member having a first working through hole, a first gear portion being arranged on the peripheral wall of the first working through hole, the second supporting member having a second working through hole, the central axis of the second working through hole being aligned with the central axis of the first working through hole, the clamping jaw being pivotally mounted on the second supporting member and being evenly arranged along the circumference of the first working through hole, the clamping jaw having a clamping surface, a butt joint surface and a second gear portion, wherein the butt joint surface of one of two adjacent clamping jaws is adjacent to and faces the clamping surface of the other clamping jaw, the clamping surfaces of at least three of the clamping jaws define a clamping cavity for clamping a connector, wherein the first gear portion is meshed with the second gear portion, and when the first supporting member rotates relative to the second supporting member, at least three of the clamping jaws rotate synchronously to expand or reduce the clamping cavity;

[0009] A test assembly is arranged on the body and includes a probe, the probe having a test probe for contacting a contact of a connector, the test assembly is movable relative to the body along a first direction so that the test probe contacts and disengages from the contact of the connector, and the test assembly is movable relative to the body along a second direction and a third direction so that the test probe is aligned with a predetermined contact of the connector, wherein the first direction, the second direction and the third direction are orthogonal to each other.

[0010] The retaining force testing device for the contact piece of the connector of the embodiment of the present invention has a large clamping force, a large size variation range of the clamping cavity, strong applicability, can realize automatic centering of the connector, and has high testing efficiency and accuracy.

[0011] In some embodiments, in two adjacent jaws, the distance between the butt joint surface of one jaw and the clamping surface of the other jaw is greater than or equal to zero and less than or equal to 5 mm.

[0012] In some embodiments, the first gear portion is an inner gear ring formed on the entire circumferential wall of the first working through hole or a plurality of inner gear ring segments spaced apart along the circumference of the first working through hole.

[0013] In some embodiments, the first supporting component is a rotatable turntable, the second supporting component includes two fixed disks mounted on the body, the turntable is rotatably disposed between the two fixed disks along the axial direction of the first working through hole, and the clamp is located in the first working through hole and is rotatably supported on the two fixed disks through a pivot.

[0014] In some embodiments, the pivot is a hollow shaft, and both ends of the pivot are respectively connected to the two fixing plates, and the fixing plates are mounted on the body via fasteners passing through the fixing plates and the pivot.

[0015] In some embodiments, the diameters of both ends of the first working through hole are enlarged to form expanded hole sections, and the two fixed plates are respectively fitted in the expanded hole sections. The side surface of the clamp is generally trapezoidal, and the clamp has a first end and a second end. The end surface area of ​​the first end is smaller than the end surface area of ​​the second end, the end surface of the first end of the clamp is formed as the docking surface, and the bottom surface of the clamp is formed as the clamping surface.

[0016] In some embodiments, the clamp also includes a driving assembly for driving the turntable to rotate, the driving assembly is installed in the body, the driving assembly includes a motor and a worm connected to the motor, and an outer gear ring meshing with the worm is provided on the outer peripheral wall surface of the turntable.

[0017] In some embodiments, a first guide rail, a second guide rail, a third guide rail and a slide are provided in the body, the first guide rail extends along the first direction, the second guide rail extends along the second direction, the third guide rail extends along the third direction, the second guide rail is provided on the first guide rail and is movable along the first guide rail, the third guide rail is provided on the second guide rail and is movable along the second guide rail, the slide is provided on the third guide rail and is movable along the third guide rail, and the test assembly is mounted on the slide.

[0018] In some embodiments, the retention force testing device of the contact piece of the connector also includes a probe storage, which is arranged in the body, and the probe storage is provided with multiple storage cavities, and the multiple storage cavities are used to store different probes. The test assembly can be aligned with any storage cavity to take out the probe in the storage cavity and place the probe into the storage cavity.

[0019] In some embodiments, the retention force testing device for the contact pieces of the connector also includes a camera and a controller, wherein the camera is disposed within the body and opposite to the fixture, the camera is used to obtain dimensional information and position information of the contact pieces of the connector clamped by the fixture, and the controller is connected to the camera to control the movement of the test component according to the dimensional information and position information obtained by the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a device for testing the retention force of a contact piece of a connector according to an embodiment of the present invention.

[0021] Figure 2It is a partial three-dimensional schematic diagram of a device for testing the retention force of a contact piece of a connector according to an embodiment of the present invention.

[0022] Figure 3 It is another partial three-dimensional schematic diagram of the device for testing the retention force of the contact piece of the connector according to the embodiment of the present invention.

[0023] Figure 4 1 is an exploded view of a fixture of a device for testing the retention force of contacts of a connector according to an embodiment of the present invention.

[0024] Figure 5 It is a three-dimensional schematic diagram of a fixture of a device for testing the retention force of a contact of a connector according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of a state in which the clamping cavity of the clamp of the contact retention force testing device of the connector according to the embodiment of the present invention is opened to the maximum.

[0026] Figure 7 It is a schematic diagram of a state in which the clamping cavity of the clamp of the contact retention force testing device of the connector according to the embodiment of the present invention is closed to the minimum.

[0027] Figure 8 It is an exploded view of an example of a test assembly of a retention force test device for a connector contact according to an embodiment of the present invention.

[0028] Fig. 9 The figure is a cross-sectional schematic diagram of an example of a test assembly of a device for testing the retention force of a contact of a connector according to an embodiment of the present invention.

[0029] Fig.10 The figure is a three-dimensional schematic diagram of an example of a test assembly of a device for testing the retention force of a contact of a connector according to an embodiment of the present invention when in contact with a contact of the connector.

[0030] Fig.11 It is a three-dimensional schematic diagram of another example of the retention force testing device for the contact piece of the connector according to the embodiment of the present invention in contact with the contact piece of the connector.

[0031] Reference numerals:

[0032] 100. Device for testing the retention force of the contacts of a connector;

[0033] 1. Machine body; 11. Bottom plate; 12. Side plate; 13. Cover; 14. Touch screen; 15. Handle; 16. Switch; 17. Operation hole;

[0034] 2. Clamp; 21. First support member (turntable); 211. First working through hole; 212. First gear portion; 213. Outer gear ring; 22. Second support member (fixed disk); 221. Second working through hole; 222. Shaft hole; 23. Clamping claw; 231. Clamping surface; 232. Butt joint surface; 233. Second gear portion; 234. Clamping cavity; 235. First end; 236. Second end; 237. Pivot hole; 24. Pivot; 25. Fastener; 26. Expanding section; 27. Drive assembly; 271. Motor; 272. Worm; 273. Support;

[0035] 3. Test assembly; 31. Probe; 311. Test probe; 3110. Probe end, 3111. Probe end hole; 32. Support body; 321. Support shell; 322. Support end cover; 323. Probe sleeve; 3230. Probe matching hole; 324. Buffer spring; 33. Force sensor; 34. Sensor lead wire;

[0036] 51. first guide rail; 52. second guide rail; 53. third guide rail; 54. slide table;

[0037] 6. Probe memory; 61. Storage chamber;

[0038] 7. Camera; 71. Mounting base;

[0039] 8. Connector; 81. Contact; 810. Contact socket; 811. Contact plug. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] The following describes a device for testing the retention force of a contact of a connector according to an embodiment of the present invention in conjunction with the accompanying drawings.

[0042] like Figure 1-7 As shown, the contact retention force testing device 100 of a connector according to an embodiment of the present invention comprises a body 1 , a fixture 2 and a testing assembly 3 .

[0043] The clamp 2 includes a first support member 21, a second support member 22 and at least three clamping jaws 23. For example, there may be 3-6 clamping jaws, thereby ensuring the formation of the clamping cavity and reducing the number of clamping jaws, simplifying the structure of the clamp, and making the clamp compact and miniaturized.

[0044] The second supporting component 22 is mounted on the machine body 1 , that is, the second supporting component 22 is fixed, and the first supporting component 21 is rotatably mounted on the second supporting component 22 .

[0045] The first supporting member 21 has a first working through hole 211 , and a first gear portion 212 is disposed on the peripheral wall of the first working through hole 211 . The second supporting member 22 has a second working through hole 221 , and the central axis of the second working through hole 221 is aligned with the central axis of the first working through hole 211 .

[0046] The clamping jaws 23 are pivotally mounted on the second support member 22 and are evenly arranged along the circumference of the first working through hole 211. The clamping jaws 23 have a clamping surface 231, a docking surface 232, and a second gear portion 233. Among two adjacent clamping jaws 23, the docking surface 232 of one clamping jaw 23 is adjacent to and faces the clamping surface 231 of the other clamping jaw 23, thereby, the clamping surfaces 231 of at least three clamping jaws 23 define or enclose a clamping cavity 234 for clamping the connector 8.

[0047] The first gear portion 212 meshes with the second gear portion 233 . When the first supporting member 21 rotates relative to the second supporting member 22 , at least three clamping jaws 23 rotate synchronously, so that the clamping cavity 234 expands or contracts.

[0048] Here, it should be understood that "the butt joint surface of one clamping jaw is adjacent to the clamping surface of another clamping jaw" means that the butt joint surface of one clamping jaw and the clamping surface of another adjacent clamping jaw can be in contact or the spacing is very small, for example, less than 10 mm, so that the clamping cavity can be called a circumferentially substantially closed cavity. Preferably, the spacing between the butt joint surface of one clamping jaw and the clamping surface of another adjacent clamping jaw is greater than or equal to zero and less than or equal to 5 mm, for example, the spacing can be 0, 1 mm, 1.25 mm, 2 mm, 3.8 mm, 4 mm, 4.5 mm or 5 mm.

[0049] When the above spacing is 0, the butt joint surface of one clamping jaw contacts and fits with the clamping surface of another adjacent clamping jaw and can slide relatively, which can prevent a very small connector from being stuck between two adjacent clamping jaws. When the above spacing is greater than 0 and less than or equal to 5mm, there is a gap between the butt joint surface of one clamping jaw and the clamping surface of another adjacent clamping jaw, but compared with the gap between the clamping elements in the related art, the gap is very small, thereby preventing the connector from being stuck between two adjacent clamping jaws, and reducing the difficulty and cost of processing, thereby improving practicality.

[0050] Figure 6 A schematic diagram showing the clamp in a state where the clamping cavity is opened to the maximum, Figure 7The schematic diagram of the clamp is shown in the state where the clamping cavity is reduced to the minimum. Compared with the three-jaw chuck, six-jaw chuck, drill chuck, and double V-block clamp in the related art, the test device of the embodiment of the present invention has a clamping jaw driven by the first supporting member through the second gear part and the first gear part that mesh with each other to rotate synchronously to expand or reduce the clamping cavity. The clamping jaw has a large clamping force, high precision, low wear, and a long service life. The size (cross-sectional area) of the clamping cavity has a larger range of variation, which is suitable for connectors with a large range of size variations, thereby improving applicability.

[0051] In the embodiment of the present invention, the cross section of the clamping cavity 234 is always a regular polygonal structure, which can clamp connectors with circular, polygonal or other peripheral contours, and the distance between the butt joint surface of one clamping jaw and the clamping surface of another adjacent clamping jaw is always kept constant and does not change with the clamping cavity 34. When clamping the connector 8, the connector 8 can be automatically centered.

[0052] The test assembly 3 is installed in the body 1 and includes a probe 31 having a test probe 311 for contacting the contact piece 81 of the connector 8. The test assembly 3 is movable relative to the body 1 in a first direction so that the test probe 311 can contact and disengage from the contact piece 81 of the connector 8. The test assembly 3 is movable relative to the body 1 in a second direction and a third direction so that the test probe 311 is aligned with a predetermined contact piece of the connector 8, wherein the first direction, the second direction, and the third direction are orthogonal to each other.

[0053] For example, Figure 1 and Figure 2 The left and right direction shown in is the first direction, Figure 1 and Figure 2 The up-down direction shown in is the second direction. Figure 1 and Figure 2 The front-to-back direction shown in is the third direction. By moving the test assembly 3 in the front-to-back direction and the up-down direction, the test probe 311 and the predetermined contact piece of the connector 8 can be aligned in the left-right direction, and then the test assembly 3 is driven to move in the left-right direction, so that the test probe 311 can be brought into contact with or out of contact with the predetermined contact piece 81 of the connector 8, thereby completing the contact force test of the contact piece.

[0054] In some embodiments, the first gear portion 212 may be configured as a complete annular inner gear ring formed on the entire circumferential wall of the first working through hole 211. Optionally, the first gear portion 212 may be configured as a plurality of inner gear ring segments spaced apart along the circumference of the first working through hole 211, the inner gear ring segments corresponding to the second gear portion 233, and the number of the inner gear ring segments may be the same as the number of the second gear portions (i.e., the number of the clamping jaws). Optionally, the number of the inner gear ring segments may be less than the number of the second gear portions, for example, two second gear portions may mesh with one inner gear ring segment respectively.

[0055] Preferably, the clamping surface 231 of the clamping jaw 23 is provided with anti-skid patterns or clamping teeth to improve the clamping effect on the connector 8 and avoid slipping.

[0056] Reference below Figure 1-Figure 11 A retention force testing device for a contact of a connector according to some specific embodiments of the present invention is described.

[0057] like Figure 1-Figure 7 As shown, the testing device 100 of the embodiment of the present invention includes a body 1, a fixture 2, a testing assembly 3, a probe storage 6, a camera 7 and a controller (not shown).

[0058] like Figure 1 As shown, the body 1 is a generally rectangular parallelepiped housing. The body 1 includes a bottom plate 11, a side plate 12 and a cover 13. The side plate 12 is fixed to the left end of the bottom plate 11, and the cover 13 is buckled on the bottom plate 11 and connected to the side plate 12, thereby defining an installation cavity in the body. The fixture 2, the test assembly 3, the probe storage 6 and the camera 7 can be arranged in the installation cavity of the body 1.

[0059] A handle 15 and a switch 16 are provided on the top surface of the housing 13. The handle 15 is used to carry and carry the test device 100. The switch 16 is used to control the power on or off of the test device 100. A touch screen 14 is provided on the housing 13 for setting test parameters, planning test paths, formulating test strategies, displaying retention, and controlling the test device 100 to complete the test.

[0060] like Figure 2 and Figure 3 As described, the installation cavity of the machine body 1 is provided with a first guide rail 51, a second guide rail 52 and a third guide rail 53. There are two first guide rails 51 and they are provided on the bottom plate 11. The two first guide rails 51 are spaced apart in the front-to-back direction and extend in the left-to-right direction. The second guide rail 52 extends in the up-down direction and is provided on the two first guide rails 51. The second guide rail 52 is movable in the left-to-right direction along the first guide rail 51. The second guide rail 51 has an inverted U-shaped structure to increase the structural stability of the second guide rail 52. In some embodiments, the second guide rail 52 can be two independent guide rails and are movably provided on the two first guide rails 51 respectively. The third guide rail 53 extends in the front-to-back direction. The front end and the rear end of the third guide rail 53 are respectively connected to the second guide rail 52 and are movable in the up-to-down direction along the second guide rail 52. A slide 54 is provided on the third guide rail 53, and the slide 54 is movable in the front-to-back direction along the third guide rail 53.

[0061] like Figure 2-Figure 3 As shown, the test assembly 3 is mounted on the slide 54 and is movable in the left-right direction, the front-back direction, and the up-down direction. Figure 8-Figure 10As shown, the test assembly 3 includes a probe 31, a support body 32 and a force sensor 33. The support body 32 includes a support shell 321, a support end cover 322, a probe sleeve 323 and a buffer spring 324. The support end cover 322 is installed at the right end of the support shell 321 to close the right end. The force sensor 33 is arranged in the support shell 321 and adjacent to the support end cover 322, the probe sleeve 323 is slidably arranged in the support shell 321 along the left and right direction (the axial direction of the support shell), and the buffer spring 324 is arranged between the force sensor 33 and the probe sleeve 323.

[0062] like Figure 8-Figure 10 As shown, the contact 81 of the connector 8 is a female contact having a contact receptacle 810, and the test probe 311 has a probe tip 3110, which can be inserted into and removed from the contact receptacle 810. In other embodiments, as Fig.11 As shown, the contact 81 of the connector 8 is a male contact having a contact plug 811 , and the test probe 311 has a probe end hole 3111 , and the contact plug 811 can be inserted into and withdrawn from the probe end hole 3111 .

[0063] The left end of the probe sleeve 323 is provided with a probe matching hole 3230, and the right end of the probe 31 can be plugged into the probe matching hole 3230, so that the probe 31 is installed on the support body 32. The left end of the probe 31 has a test probe 311, which is used to contact and match with the contact member 81 of the connector 8. The force sensor 33 is connected through a sensor lead 34, and the sensor lead 34 passes through the support end cover 322 and extends out of the support housing 321, for example, connected to a controller.

[0064] Those skilled in the art will appreciate that the force sensor may be disposed at other locations as long as it is capable of detecting the thrust exerted by the test component 3 on the connector 8 or the reaction force exerted by the connector 8 on the test component 3 .

[0065] A driving device, such as a motor or an electric push rod, may be provided in the installation cavity of the body 1 to drive the test assembly 3 to move in the left-right direction, the up-down direction, and the front-back direction. The driving device may be connected to a controller so that the controller controls the movement of the test assembly 3.

[0066] The probe storage 6 is arranged in the installation cavity of the body 1. The probe storage 6 is provided with a plurality of storage cavities 61, and the plurality of storage cavities 61 are used to store different probes 31 for different connectors or different contacts 81 of the connector. The test assembly 3 can be aligned with any storage cavity to take out the probe in the storage cavity and put the probe into the storage cavity. The probe storage 6 can be arranged side by side with the fixture 2 in the body 1 to save space.

[0067] like Figure 2 and Figure 3As shown, a mounting seat 71 is provided in the mounting cavity of the body 1, and a camera 7 is mounted on the mounting seat 71 and opposite to the fixture 2, and is used to take pictures of the connector 8 to obtain the external dimension information and position information of each contact 81 of the connector 8. The controller is connected to the camera 7 to control the movement of the test component 3 according to the external dimension information and position information obtained by the camera 7, so that the test component 3 selects a suitable probe from the probe memory 6 and aligns the test probe 311 with the predetermined contact 81. The controller is also connected to the force sensor of the test component 3 to obtain the thrust applied by the test component 3 to the contact 81 of the connector 8 or the reaction force of the contact of the connector 8 on the test component 3. In addition, the controller can also group the contacts, plan the test path, and formulate the test strategy according to the external dimension information and position information obtained, and then test the holding force of multiple contacts in sequence according to the test strategy.

[0068] For example, when grouping the contacts, the same multiple contacts can be grouped into one group. During testing, the same probe is used to test the multiple contacts in the same group in sequence. After the multiple contacts in the same group are tested, the probe is placed in a storage cavity of the probe storage, and then another probe 31 is taken out from another storage cavity to test the multiple contacts in another group in sequence. This can reduce the number of probe replacements and improve test efficiency.

[0069] The fixture 2 is installed in the installation cavity of the body 1, such as Figure 3 As shown, the fixture 2 is mounted on the side plate 12 and is located inside the side plate 12. The side plate 12 is provided with an operation through hole 17, through which the connector 8 can be installed in and removed from the fixture 2 from the outside of the installation cavity of the body 1 without opening the cover 13, thereby improving the test efficiency.

[0070] like Figure 1-Figure 7 As shown, the clamp 2 includes a rotatable turntable 21, two fixed disks 22, four clamping jaws 23 and a driving assembly 27, wherein the turntable 21 is a first supporting component, and the two fixed disks 22 are a second supporting component.

[0071] The rotating disk 22 is a disk and has a circular first working hole 211 located at the center of the disk. The fixed disk 22 is a disk and has a circular second working hole 221 located at the center of the fixed disk and a plurality of axial holes 222 evenly arranged around the second working through hole 221. The two fixed disks 22 are mounted on the side plate 12. The rotating disk 22 is axially ( Figure 2 The second working through hole 221 is rotatably arranged between the two fixed plates (in the left and right directions), and the central axis of the second working through hole 221 coincides with the central axis of the first working through hole 211.

[0072] The diameters of both ends of the first working through hole 211 are enlarged to form an expanded hole section 26. In other words, the first working through hole 211 is divided into three sections, with large diameters at both ends and a small diameter in the middle, so that an annular boss is formed in the middle of the peripheral wall of the first working through hole 211, an inner gear ring 212 is provided on the peripheral wall of the annular boss, and an outer gear ring 213 is provided on the outer peripheral wall of the turntable.

[0073] The two fixed disks 22 are respectively fitted in the two reaming sections 26 and stopped by the annular boss, thereby improving the assembly accuracy and stability of the fixed disk and the rotating disk, reducing the thickness of the fixture, and making the fixture compact and small in size.

[0074] like Figure 4 and Figure 5 As shown, four clamping jaws 23 are located in the first working through hole 211. The clamping jaws 23 are provided with a plurality of pivot holes 237, and the clamping jaws 23 are rotatably mounted between the two fixed disks 22 through the pivot 24 passing through the pivot hole 237. The pivot 24 is a hollow shaft, and the two ends of the pivot 24 are respectively fitted in the shaft holes 222 on the two fixed disks, and the two fixed disks are respectively mounted on the side plate 12 of the body 1 through fasteners 25, such as bolts, passing through the pivot 24. Moreover, the fasteners 25 connect the two fixed disks 22 together, thereby increasing the stability of the overall structure.

[0075] like Figure 4 As shown, the side surface of the clamping jaw 23 is generally trapezoidal, and the clamping jaw 23 has a first end 235 and a second end 236. The end surface area of ​​the first end 235 is smaller than the end surface area of ​​the second end 236. The end surface of the first end 235 of the clamping jaw 23 is formed as a docking surface 232, and the bottom surface of the clamping jaw 23 is formed as a clamping surface 231. The second gear portion is formed at the intersection of the end surface of the second end of the clamping jaw 23 and the upper surface. The bottom surface of the clamping jaw 23 is the surface of the clamping jaw 23 facing the center of the turntable, and the upper surface is the surface of the clamping jaw 23 opposite to the bottom surface.

[0076] like Figure 3-7 As shown, the driving assembly 27 is arranged in the body 1 and includes a motor 271 and a worm 272, one end of the worm 272 is connected to the motor 271, and the other end of the worm 272 is rotatably supported by a support 273. The worm 272 is meshed with the outer ring gear 213 of the turntable 22. For example, under the control of the controller, the motor 271 can drive the turntable 21 to rotate forward relative to the fixed disk 22 by meshing the worm 272 and the inner ring gear (worm wheel) 213 with each other, and then the turntable 21 drives the four clamping claws 3 to swing synchronously around the pivot 24 through the meshing inner ring gear 212 and the second gear part 233, and the clamping cavity 234 gradually opens to the maximum, as shown in FIG. Figure 6 shown.

[0077] When the motor 271 drives the rotating disk 21 to rotate in the opposite direction relative to the fixed disk 22 through the worm 272 and the outer gear ring 213, the clamping claws are driven to reverse synchronously, and the clamping cavity 234 gradually shrinks. Figure 7 As shown, the area of ​​the clamping cavity can be reduced to almost zero. Preferably, in order to reduce the machining accuracy requirements and facilitate assembly, the minimum cross-section of the clamping cavity is greater than zero.

[0078] In the embodiment of the present invention, the motor drives the turntable to rotate through the worm gear pair, and the turntable drives the clamping jaws to rotate synchronously through the gear pair, so that the clamping jaws have a large clamping force, a good clamping effect, are not easy to wear, and have high precision. The size of the clamping cavity has a large range of variation, good applicability, and can automatically center the connector, and the gap between the clamping jaws can be very small, which improves reliability.

[0079] The following describes the testing process of the testing device 100 according to the embodiment of the present invention.

[0080] The switch 16 is operated to power on the test device 100. By operating the touch screen 14, the motor 271 drives the turntable 21 to rotate forward, the four clamping jaws 23 swing forward synchronously, the clamping cavity 234 gradually opens, and the connector 8 is placed in the clamping cavity 234. Then the motor 271 drives the turntable 21 to rotate reversely, the four clamping jaws 23 swing reversely synchronously, the clamping cavity 234 gradually shrinks, and the clamping jaws 23 clamp the connector.

[0081] By operating the touch screen 14, the camera 7 is started to obtain the position information and the size information of the contact, the contact is grouped, the test path is planned, and the test strategy is formulated. The controller controls the driving device to drive the test component 3 to move in the body 1, and the support body 32 takes a corresponding probe 31 from the probe memory 6. Then the controller drives the test component 3 to move according to the position information and size information of the contact obtained by the camera 7, so that the test probe 311 contacts the predetermined contact 81 of the connector 8, and gradually increases the thrust applied by the test component 3 to the predetermined contact 81. When the thrust reaches the preset value, the thrust is stopped for a period of time. The change of the thrust (i.e., the reaction force of the contact on the test component) can be displayed on the touch screen to judge whether the contact is qualified. For example, if the thrust is attenuated, it indicates that the contact has retreated and the holding force of the contact is insufficient. At this time, the test device can mark it as unqualified and issue an alarm. If the thrust is not attenuated, the holding force of the surface contact can reach the preset value and be marked as qualified. Then, the controller controls the test assembly to move away from the connection, so that the test probe is disengaged from the contact, and the test of the contact is completed.

[0082] When all the contact parts are tested, the motor 72 drives the turntable 21 to rotate forward, so that the clamping jaws 23 rotate forward synchronously, and the clamping cavity 234 gradually increases to release the connector 8, so that the connector 8 can be removed from the fixture. For other operations and operations of the test device of the embodiment of the present invention, those skilled in the art can adopt known operation and operation strategies, which will not be repeated here.

[0083] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for testing the retention force of a contact of a connector, characterized in that: include: Body; A clamp, the clamp comprising a first supporting member, a second supporting member and at least three clamping jaws, the second supporting member being mounted on the machine body, the first supporting member being connected to the second supporting member and being rotatable relative to the second supporting member, the first supporting member having a first working through hole, a first gear portion being arranged on the peripheral wall of the first working through hole, the second supporting member having a second working through hole, the central axis of the second working through hole being aligned with the central axis of the first working through hole, the clamping jaw being pivotally mounted on the second supporting member and being evenly arranged along the circumference of the first working through hole, the clamping jaw having a clamping surface, a butt joint surface and a second gear portion, wherein the butt joint surface of one of two adjacent clamping jaws is adjacent to and faces the clamping surface of the other clamping jaw, the clamping surfaces of at least three of the clamping jaws define a clamping cavity for clamping a connector, wherein the first gear portion is meshed with the second gear portion, and when the first supporting member rotates relative to the second supporting member, at least three of the clamping jaws rotate synchronously to expand or reduce the clamping cavity; A test assembly is arranged in the body and includes a probe, the probe having a test probe for contacting a contact of a connector, the test assembly is movable relative to the body along a first direction so that the test probe contacts and disengages from the contact of the connector, and the test assembly is movable relative to the body along a second direction and a third direction so that the test probe is aligned with a predetermined contact of the connector, wherein the first direction, the second direction and the third direction are orthogonal to each other.

2. The device for testing the retention force of a connector contact according to claim 1, characterized in that: In two adjacent clamping jaws, the distance between the butt joint surface of one clamping jaw and the clamping surface of the other clamping jaw is greater than or equal to zero and less than or equal to 5 mm.

3. The device for testing the retention force of a connector contact according to claim 1, characterized in that: The first gear portion is an inner gear ring formed on the entire circumferential wall of the first working through hole or a plurality of inner gear ring segments spaced apart along the circumferential direction of the first working through hole.

4. The device for testing the retention force of a connector contact according to claim 1, characterized in that: The first supporting component is a rotatable turntable, and the second supporting component includes two fixed disks installed on the body. The turntable is rotatably arranged between the two fixed disks along the axial direction of the first working through hole, and the clamp is located in the first working through hole and is rotatably supported on the two fixed disks through a pivot.

5. The device for testing the retention force of a connector contact according to claim 4, characterized in that: The pivot is a hollow shaft, and both ends of the pivot are respectively connected to the two fixing plates, and the fixing plates are mounted on the machine body via fasteners passing through the fixing plates and the pivot.

6. The device for testing the retention force of a connector contact according to claim 5, characterized in that: The diameters of both ends of the first working through hole are enlarged to form expanded hole sections, and the two fixed plates are respectively fitted in the expanded hole sections. The side surface of the clamp is generally trapezoidal, and the clamp has a first end and a second end. The end surface area of ​​the first end is smaller than the end surface area of ​​the second end. The end surface of the first end of the clamp is formed as the docking surface, and the bottom surface of the clamp is formed as the clamping surface.

7. The device for testing the retention force of a connector contact according to claim 4, characterized in that: The fixture also includes a driving assembly for driving the turntable to rotate. The driving assembly is arranged in the body. The driving assembly includes a motor and a worm connected to the motor. An outer gear ring meshing with the worm is provided on the outer peripheral wall surface of the turntable.

8. The device for testing the retention force of a connector contact according to claim 1, characterized in that: A first guide rail, a second guide rail, a third guide rail and a slide are provided in the body, the first guide rail extends along the first direction, the second guide rail extends along the second direction, the third guide rail extends along the third direction, the second guide rail is provided on the first guide rail and is movable along the first guide rail, the third guide rail is provided on the second guide rail and is movable along the second guide rail, the slide is provided on the third guide rail and is movable along the third guide rail, and the test assembly is mounted on the slide.

9. The device for testing the retention force of a connector contact according to claim 1, characterized in that: It also includes a probe storage, which is arranged in the body and has multiple storage cavities. The multiple storage cavities are used to store different probes. The test assembly can be aligned with any storage cavity to take out the probe in the storage cavity and put the probe into the storage cavity.

10. The device for testing the retention force of a contact of a connector according to any one of claims 1 to 9, characterized in that: It also includes a camera and a controller, wherein the camera is arranged in the body and opposite to the clamp, the camera is used to obtain the dimensional information and position information of the contact pieces of the connector clamped by the clamp, and the controller is connected to the camera to control the movement of the test component according to the dimensional information and position information obtained by the camera.

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