Test fixture

Abstract

The invention provides a test fixture. The test fixture comprises a base, a test seat, a carrying seat, a lifting mechanism and a driving mechanism, the test seat and the base are oppositely arranged along a first direction. The test seat is provided with a test module. The carrier is provided with a circuit board. The lifting mechanism drives the carrying seat to move to a first position or a second position and comprises a first connecting rod and a second connecting rod. And the first connecting rod and the second connecting rod are rotationally connected and are rotationally connected with the carrying seat and the base respectively. The driving mechanism is used for driving the second connecting rod to rotate relative to the base and comprises a first driving rod and a second driving rod. And the first driving rod and the second driving rod are rotationally connected and are rotationally connected with the base and the second connecting rod respectively. The first driving rod is used for being stressed to rotate relative to the base. When the first connecting rod rotates and the included angle between the first connecting rod and the carrying seat is gradually reduced, the included angle between the first driving rod and the second driving rod is gradually increased. According to the test fixture provided by the invention, the influence of sudden increase of resistance when the circuit board is moved is relieved.

Description

Technical Field

[0001] This application relates to the technical field of servers, and more particularly, to a test fixture. Background Art

[0002] During the production and manufacturing process of some circuit boards, it is necessary to plug the interface to be tested of the circuit board into the test interface of the test module to test the interface to be tested of the circuit board. However, resistance will be generated during the plugging process after the interface to be tested and the test interface are in contact, so that the resistance that the user needs to overcome suddenly increases when moving the circuit board towards the test module, which is not conducive to operation. Summary of the Invention

[0003] In view of this, an embodiment of this application provides a test fixture to alleviate the impact of sudden increase in resistance when moving the circuit board.

[0004] An embodiment of this application provides a test fixture. The test fixture includes a base, a test seat, a carrier seat, a lifting mechanism, and a driving mechanism. The test seat is disposed opposite to the base in a first direction. The test seat is used to carry the test module. The test module is used to test the circuit board. The carrier seat is disposed between the base and the test seat in the first direction. And the carrier seat is used to carry the circuit board. The lifting mechanism includes a lifting component. The lifting component is used to drive the carrier seat to move to a first position or a second position. The lifting component includes a first connecting rod and a second connecting rod. The first connecting rod is rotatably connected to the second connecting rod. The first connecting rod is rotatably connected to the carrier seat. The second connecting rod is rotatably connected to the base. When the carrier seat is in the first position, the interface to be tested of the circuit board is plugged into the test interface of the test module. When the carrier seat is in the second position, the interface to be tested is separated from the test interface. The driving mechanism includes a driving component. The driving component is used to drive the second connecting rod to rotate relative to the base. The driving component includes a first driving rod and a second driving rod. The first driving rod and the second driving rod are rotatably connected. The first driving rod is rotatably connected to the base. The first driving rod is used to be stressed to rotate relative to the base. The second driving rod is rotatably connected to the second connecting rod. When the first connecting rod rotates and the included angle between the first connecting rod and the carrier seat gradually decreases, the included angle between the first driving rod and the second driving rod gradually increases.

[0005] When the carrier moves closer to the test base, the angle between the first connecting rod and the carrier gradually increases, and the trend of the component force of the force required to push the first connecting rod in the direction perpendicular to the first direction is gradually decreasing. Therefore, during the process of the interface to be tested on the circuit board being switched from not plugged to plugged with the test interface of the test module, the force exerted on the circuit board by the test module is transmitted to the first connecting rod through the carrier, and when a sudden increase in resistance is encountered when pushing the first connecting rod, the component force of the sudden increase in resistance in the direction perpendicular to the first direction still has a gradually decreasing trend, making the total force required to push the first connecting rod move gradually decrease, thereby reducing the impact of the sudden increase in resistance on controlling the movement of the carrier; and before the first connecting rod encounters the sudden increase in resistance, a part of the total force required to push the first connecting rod has already decreased, and it can "digest" at least part of the sudden increase in resistance. Therefore, from the overall process of controlling the movement of the carrier, the overall range of change in the magnitude of the force for controlling the movement of the carrier through the lifting component is reduced, thereby alleviating the impact of the sudden increase in resistance when moving the circuit board. When the angle between the first connecting rod and the carrier gradually decreases, the total force exerted by the first connecting rod on the second connecting rod generally has an increasing trend, and then the force exerted by the second connecting rod on the second driving rod has an increasing trend. When the angle between the first driving rod and the second driving rod gradually increases, the component force of the force required to drive the second driving rod in the direction perpendicular to the line connecting the distal ends of the first driving rod and the second driving rod gradually decreases. If the force received by the second driving rod from the second connecting rod is constant, then the total force required to drive the second driving rod through the first driving rod can be reduced. Therefore, the trend of change in the magnitude of the force exerted by the second connecting rod on the second driving rod is opposite to the trend of change in the magnitude of the force for driving the second driving rod to move by the first driving rod, which is beneficial to maintaining the force applied to the first driving rod to rotate the first driving rod at a relatively stable magnitude, so as to reduce the difficulty of controlling the movement of the first driving rod.

[0006] In some embodiments of the present application, when the carrier is in the second position, the elastic member between the circuit board and the test module is separated.

[0007] During the process of the carrier moving from the second position to the first position, the elastic member contacts the circuit board before the test interface. Therefore, by gradually increasing the angle between the first connecting rod and the carrier, at least part of the newly added resistance due to the elastic deformation of the elastic member can be "digested", so as to alleviate the impact of the sudden increase in resistance when moving the circuit board from the overall process of controlling the movement of the carrier.

[0008] In some embodiments of the present application, the first driving rod and the second driving rod are rotatably connected through a first driving shaft. The first driving rod and the base are rotatably connected through a second driving shaft. The second driving rod and the second connecting rod are rotatably connected through a third driving shaft. When the carrier moves to the second position, the axes of the first driving shaft, the second driving shaft, and the third driving shaft are coplanar.

[0009] When the axes of the first drive shaft, the second drive shaft, and the third drive shaft are coplanar, the interaction force between the first drive rod and the second drive rod has no component force in the direction perpendicular to the plane where the axes of the first drive shaft, the second drive shaft, and the third drive shaft are located. On the one hand, it is convenient to drive the first drive rod to rotate with a smaller force, so that it is very easy to move the carrier from the second position to the first position; on the other hand, it is convenient to lock the position of the first drive rod with a smaller force, so that it is very easy to keep the carrier in the second position.

[0010] In some embodiments of the present application, the drive mechanism further includes a control rod. The control rod is fixedly connected to the first drive rod, and the control rod is used to be stressed to drive the first drive rod to rotate relative to the base.

[0011] By providing the control rod, the setting position of the structure of the drive mechanism for receiving force can be transferred, which is beneficial to reducing the possibility of interfering with or hindering the linkage cooperation between the drive component and the lifting component, thereby facilitating the stable control of the movement of the carrier close to or away from the test seat.

[0012] In some embodiments of the present application, there are multiple lifting mechanisms. The multiple lifting mechanisms are distributed at intervals. There are multiple drive components. Each lifting mechanism is connected to one drive component. The drive mechanism further includes a transmission rod. The multiple drive components are connected to the transmission rod so that when one of the multiple drive components acts, the other drive components in the multiple drive components act synchronously. In each lifting mechanism, there are multiple lifting components. The multiple lifting components are distributed at intervals. And the distribution direction of the multiple lifting mechanisms intersects with the distribution direction of the multiple lifting components in the same lifting mechanism. The lifting mechanism further includes a linkage rod. The multiple lifting components are connected to the linkage rod so that the first connecting rods in the multiple lifting components act synchronously. Setting multiple lifting mechanisms at intervals and dispersing the force application positions for moving the carrier is beneficial to the stable movement of the carrier. And by providing the transmission rod, the multiple drive components can act synchronously, so that the multiple lifting mechanisms can be driven to act synchronously. On the one hand, it is beneficial to simplify the operation of controlling the action of the drive mechanism, and on the other hand, it is beneficial to reduce the occupied space of the drive mechanism and improve the overall space utilization rate of the test fixture. Setting multiple lifting components at intervals and dispersing the force application positions for moving the carrier is beneficial to the stable movement of the carrier. And by providing the linkage rod, the multiple lifting components can act synchronously. On the one hand, it is beneficial to simplify the structure and operation of controlling the action of the lifting mechanism, and on the other hand, it is beneficial to reduce the occupied space of the lifting mechanism and improve the overall space utilization rate of the test fixture. And the distribution direction of the lifting mechanism is different from the distribution direction of the lifting components in the same lifting mechanism, which can further disperse the force application positions on the carrier and is beneficial to the stable movement of the carrier.

[0013] In some embodiments of the present application, the first connecting rod and the second connecting rod are rotatably connected through a first connecting shaft. The first connecting rod and the carrier are rotatably connected through a second connecting shaft. The second connecting shaft and the base are rotatably connected through a third connecting shaft. When the carrier moves to the first position, the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are coplanar.

[0014] When the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are coplanar, the mutual acting force between the first connecting rod and the second connecting rod has no component force in the direction perpendicular to the plane where the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are located. On the one hand, it is convenient to drive the second connecting rod to rotate with a smaller force, so that it is easy to move the carrier from the first position to the second position; on the other hand, it is convenient to lock the position of the second connecting rod with a smaller force, so that it is easy to keep the carrier in the first position.

[0015] In some embodiments of the present application, when the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are coplanar, the plane where the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are located is parallel to the first direction.

[0016] At this time, the acting force direction of the carrier on the first connecting rod and the acting force direction of the first connecting rod on the second connecting rod are both parallel to the first direction. Therefore, the acting force applied to the first connecting rod by the carrier has no component force in the direction perpendicular to the plane where the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are located. It is difficult for the acting force applied to the first connecting rod by the carrier to cause a tendency for the first connecting rod to rotate relative to the carrier, so that it is more convenient to drive the second connecting rod to rotate with a smaller force, and it is also more convenient to lock the position of the second connecting rod with a smaller force.

[0017] In some embodiments of the present application, the third drive shaft penetrates through the second connecting rod, and both ends of the third drive shaft extend out of both sides of the second connecting rod. The second drive rod has two drive arms. The two drive arms are respectively rotatably connected to both ends of the third drive shaft. The second drive rod bends away from the second connecting rod.

[0018] The two driving arms are located on both sides of the second driving rod, so as to balance the force on the third driving shaft with respect to the second driving rod and the second connecting rod, which is beneficial to avoiding the rotational tendency of the end of the third driving shaft along its radial direction, reducing the loss of the acting force when the second driving rod drives the second connecting rod to rotate, and thus making it easier for the user to control the movement of the carrier. When the carrier moves to the second position, the second driving rod gradually abuts against the second connecting rod. The second driving rod is arranged in a bent structure to avoid the structures of the second connecting rod and the third connecting shaft, which is beneficial to making the included angle between the second connecting rod and the base smaller, so that the carrier is farther away from the test seat when moving to the second position, facilitating the user to disassemble and assemble the circuit board. In some embodiments of the present application, the test fixture further includes a guiding mechanism. The guiding mechanism includes a guiding rod and a sliding sleeve. The guiding rod connects the base and the test seat. The sliding sleeve is sleeved on the guiding rod and is used to slide relative to the guiding rod in the first direction. The sliding sleeve is fixedly connected to the carrier.

[0019] The relative positions of the guiding rod, the base and the test seat are fixed. The carrier can slide along the guiding rod through the sliding sleeve, thereby improving the accuracy of the position of the carrier relative to the base and the test seat when moving. Moreover, the guiding rod, the base and the test seat are connected to form an integral body, improving the stability of the relative position of the guiding rod, which is beneficial to alleviating the influence of the component of the acting force applied by the first connecting rod to the carrier in the direction perpendicular to the first direction on the guiding rod.

[0020] In some embodiments of the present application, the test fixture further includes a limiting member. The limiting member is fixedly arranged relative to the base. The limiting member is used to stop the carrier from moving closer to the test seat when the carrier moves to the first position.

[0021] By setting the limiting member to stop the movement of the carrier, it is convenient to judge whether the carrier has moved to the first position, simplifying the operation of controlling the plugging of the interface to be tested and the test interface in place. And after the carrier moves to the first position, by continuing to apply an acting force to the carrier to make the carrier move closer to the test seat, the carrier can be maintained at the first position in cooperation with the limiting member, and the operation is simple.

[0022] In some embodiments of the present application, when the carrier moves to the first position, the limiting member abuts against the lifting assembly to stop the first connecting rod and the second connecting rod from continuing to rotate in a direction that increases the included angle between the first connecting rod and the second connecting rod.

[0023] The lifting assembly acts under force, thereby driving the movement of the carrier. The limiting member abuts against the lifting assembly, enabling the lifting assembly to be simultaneously subjected to the driving force that drives its movement and the blocking force that stops its movement by the limiting member, making the lifting assembly balanced in force without the need to transfer the acting force through other structures, and making it easier to stabilize the posture of the lifting assembly.

[0024] In some embodiments of the present application, the test fixture further includes an auxiliary lifting member. The auxiliary lifting member is arranged on the base and is used to apply an acting force to the carrier to make the carrier move in the direction closer to the test seat.

[0025] By providing an auxiliary lifting member, the force applied to the test fixture to move the carrier closer to the test base can be reduced. During the process of the interface under test on the circuit board being switched from not plugged to plugged with the test interface of the test module, the auxiliary lifting member can help overcome the resistance exerted by the test module on the circuit board and hindering the carrier from approaching the test base, thereby reducing the difficulty of plugging the interface under test and the test interface. And during the process of the interface under test on the circuit board being switched from plugged to not plugged with the test interface of the test module, the resistance originally exerted by the test module on the circuit board and hindering the carrier from approaching the test base can be used in the reverse direction to assist in counteracting the force applied by the auxiliary lifting member, thereby making the user's operation of controlling the carrier to switch between the first position and the second position more stable.

[0026] In some embodiments of the present application, the auxiliary lifting member is connected between the base and the lifting assembly. The auxiliary lifting member has a telescopic structure. The auxiliary lifting member is used to extend and apply a force to the lifting assembly, so that the first connecting rod and the second connecting rod rotate in the direction of increasing the angle between the first connecting rod and the second connecting rod.

[0027] The lifting assembly acts under the force, thereby driving the movement of the carrier. The auxiliary lifting member applies a force to the lifting assembly to assist the carrier in moving closer to the test base, so that multiple forces can form a resultant force at the lifting assembly, and the lifting assembly can be in force balance without the need to transfer the force through other structures, making it easier to stabilize the attitude of the lifting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope.

[0029] Figure 1 Schematic structural diagram of a test fixture provided by an embodiment of the present application; Figure 2 For Figure 1 Schematic structural diagram of the test fixture when the carrier is in the first position; Figure 3 For Figure 1 Schematic structural diagram of the test fixture when the carrier is in the first position; Figure 4 For Figure 1 Schematic structural diagram of the test fixture with some structures omitted; Figure 5 For Figure 4 Schematic structural diagram of the lifting mechanism; Figure 6 For Figure 5 Schematic structural diagram of the lifting assembly; Figure 7 ForFigure 4 Schematic diagram of the structure of the middle drive mechanism; Figure 8 For Figure 7 Schematic diagram of the structure of the middle drive component; Figure 9 Schematic diagram of the cooperation structure of the control rod, positioning seat and elastic member provided in an embodiment of the present application.

[0030] Description of main component symbols: 100, test fixture; 10, base; 20, test seat; 30, carrier seat; 40, guiding mechanism; 41, guiding rod; 42, sliding sleeve; 50, lifting mechanism; 51, lifting component; 511, first connecting rod; 512, second connecting rod; 513, first connecting shaft; 514, second connecting shaft; 515, third connecting shaft; 52, linkage rod; 60, drive mechanism; 61, drive component; 611, first drive rod; 612, second drive rod; 6121, drive arm; 613, first drive shaft; 614, second drive shaft; 615, third drive shaft; 62, transmission rod; 63, control rod; 631, strip-shaped hole; 64, positioning seat; 641, moving channel; 6411, first positioning portion; 6412, second positioning portion; 65, positioning pin; 66, resetting member; 70, limiting member; 80, auxiliary lifting member; 200, test module; 201, test interface; 202, elastic member; Z, first direction; Y, second direction; X, third direction. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art belonging to the field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific implementation manners, and are not intended to limit the present application.

[0033] The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] The symbol "~" should be understood to include its endpoint values %.

[0035] In addition, terms such as "first", "second", "third", etc. are for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] During the production and manufacturing process of a partial circuit board, it is necessary to plug the interface to be tested of the circuit board into the test interface of the test module to test the interface to be tested of the circuit board. In the related art, some circuit boards (such as server motherboards) have complex circuits and a large number of interfaces. Before testing them, various interfaces need to be connected. To meet the requirements of efficient production, all the interfaces to be tested are inserted at one time by the method of upper and lower mold clamping. In order to achieve stable plugging and matching between the interface to be tested and the test interface, at least one of the interface to be tested and the test interface is installed in an elastic modular manner, so that the plugging elastic force needs to be overcome during the plugging and matching. For example, if there are 43 interfaces to be tested and the plugging elastic force of each is 40N, the driving force required to overcome the plugging elastic force during testing is 1720N. In the related art, the sliding frame is provided with an inclined groove to cooperate with the carrier for assembling the circuit board. By horizontally moving the sliding frame, the carrier moves longitudinally to approach the test seat for assembling the test module, and the resistance (such as the plugging elastic force, etc.) during the process of moving the circuit board closer to the test module will suddenly increase, which is not conducive to user operation. Among them, the user can be a human or a robot, etc.

[0037] An embodiment of the present application provides a test fixture. The test fixture includes a base, a test seat, a carrier, a lifting mechanism, and a driving mechanism. The test seat is disposed opposite to the base in a first direction. The test seat is used to carry the test module. The test module is used to test the circuit board. The carrier is disposed between the base and the test seat in the first direction. And the carrier is used to carry the circuit board. The lifting mechanism includes a lifting component. The lifting component is used to drive the carrier to move to a first position or a second position. The lifting component includes a first connecting rod and a second connecting rod. The first connecting rod is rotatably connected to the second connecting rod. The first connecting rod is rotatably connected to the carrier. The second connecting rod is rotatably connected to the base. When the carrier is in the first position, the interface to be tested of the circuit board is plugged into the test interface of the test module. When the carrier is in the second position, the interface to be tested is separated from the test interface. The driving mechanism includes a driving component. The driving component is used to drive the second connecting rod to rotate relative to the base. The driving component includes a first driving rod and a second driving rod. The first driving rod and the second driving rod are rotatably connected. The first driving rod is rotatably connected to the base. The first driving rod is used to be stressed to rotate relative to the base. The second driving rod is rotatably connected to the second connecting rod. When the first connecting rod rotates and the included angle between the first connecting rod and the carrier gradually decreases, the included angle between the first driving rod and the second driving rod gradually increases.

[0038] When the carrier is pushed closer to the test base, the angle between the first connecting rod and the carrier gradually increases, and the component force of the force required to push the first connecting rod in the direction perpendicular to the first direction gradually decreases. Therefore, during the process of the interface to be tested of the circuit board and the test interface of the test module changing from not being plugged to being plugged, the acting force of the test module on the circuit board is transmitted to the first connecting rod through the carrier. When the first connecting rod is suddenly increased in resistance, the component force corresponding to the suddenly increased resistance in the direction perpendicular to the first direction still has a gradually decreasing trend, so that the total acting force required to push the first connecting rod to move gradually decreases, thereby reducing the influence of the suddenly increased resistance on controlling the movement of the carrier; and before the first connecting rod is not suddenly increased in resistance, a part of the total acting force required to push the first connecting rod to move has been reduced, and at least part of the suddenly increased resistance can be "digested". Therefore, from the overall process of controlling the movement of the carrier, the total range change of the acting force size for controlling the movement of the carrier through the lifting component is reduced, thereby alleviating the influence of the sudden increase in resistance when moving the circuit board. When the angle between the first connecting rod and the carrier gradually decreases, the total acting force applied by the first connecting rod to the second connecting rod generally has an increasing trend, and the acting force of the second connecting rod on the second driving rod has an increasing trend. When the angle between the first driving rod and the second driving rod gradually increases, the component force of the acting force required to drive the second driving rod in the direction perpendicular to the line connecting the distal ends of the first driving rod and the second driving rod gradually decreases. If the acting force received by the second driving rod from the second connecting rod is constant, the total acting force for driving the second driving rod to act through the first driving rod can be reduced. Therefore, the change trend of the acting force size of the second connecting rod on the second driving rod is opposite to the change trend of the acting force size for driving the second driving rod to move by the first driving rod, which is beneficial to maintaining the acting force applied to the first driving rod to rotate the first driving rod at a relatively stable size, so as to reduce the difficulty of controlling the movement of the first driving rod.

[0039] The following will describe some embodiments of the present application in detail with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. In the present application, Figure 2 shows the state of cooperation between the test fixture and the test module when the carrier is in the first position, Figure 3 shows the state of cooperation between the test fixture and the test module when the carrier is in the second position, Figure 4 The base, the test base, the carrier and the guiding mechanism are omitted.

[0040] See Figure 1 In an embodiment of the present application, a test fixture 100 is provided for driving a circuit board (not shown in the figure) closer to a test module 200 (such as Figure 2 and Figure 3As shown). The test module 200 is used to test the circuit board. The circuit board has an interface to be tested, and the test module 200 has a test interface 201. The test fixture 100 drives the circuit board to move, so that the interface to be tested and the test interface 201 are plugged in to implement the test of the interface to be tested of the circuit board.

[0041] See Figure 1 and Figure 4 In some embodiments, the test fixture 100 includes a base 10, a test base 20, a carrier base 30, and a lifting mechanism 50. The test base 20 is used to carry the test module 200. The carrier base 30 is used to carry the circuit board. The test base 20 is fixedly arranged relative to the base 10. The carrier base 30 is movably arranged on the base 10 through the lifting mechanism 50. The lifting mechanism 50 drives the carrier base 30 to move closer to or away from the test base 20 to implement the plugging of the interface to be tested and the test interface 201.

[0042] In some embodiments, a first direction Z, a second direction Y, and a third direction X that are perpendicular to each other in pairs are defined. Among them, the relative perpendicularity of the two does not mean an absolute 90° relationship, but allows a certain deviation as long as it does not hinder the lifting mechanism 50 from driving the carrier base 30 to move.

[0043] See Figures 1 to 3 In some embodiments, the test base 20 and the base 10 are arranged opposite to each other along the first direction Z. The carrier base 30 is arranged on the base 10 and between the test base 20 along the first direction Z. The guiding mechanism 40 is connected to the carrier base 30 and guides the carrier base 30 to move along the first direction Z. The lifting mechanism 50 includes a lifting component 51. The lifting component 51 is used to drive the carrier base 30 to move to a first position or a second position. When the carrier base 30 is in the first position, the distance between the carrier base 30 and the test base 20 satisfies the condition that the interface to be tested of the circuit board and the test interface 201 of the test module 200 are plugged in. When the carrier base 30 is in the second position, the distance between the carrier base 30 and the test base 20 satisfies the condition that the interface to be tested and the test interface 201 are not plugged in. It can be understood that in some embodiments, the base 10, the test base 20, and the carrier base 30 are all arranged perpendicular to the first direction Z.

[0044] By setting the lifting mechanism 50, the lifting component 51 of the lifting mechanism 50 can drive the carrier base 30 to move away from the test base 20 along the first direction Z to facilitate the loading and unloading of the circuit board on the carrier base 30, and the lifting component 51 can also drive the carrier base 30 to move closer to the test base 20 along the first direction Z to facilitate the plugging and matching of the circuit board and the test module 200.

[0045] It can be understood that in some embodiments, when the test fixture 100 is in the use state where the interface to be tested of the control circuit board is plugged into the test interface 201 of the test module 200, the first direction Z is parallel to the direction of gravity, and the circuit board is assembled on the upper side of the carrier 30 along the direction of gravity, so as to facilitate the loading and unloading operations between the circuit board and the carrier 30. In other embodiments, the first direction Z may also be perpendicular to the direction of gravity or other directions.

[0046] See also Figure 2 and Figure 3 It can be understood that in some embodiments, when the carrier 30 is in the first position, it is the position closest to the test seat 20 along the first direction Z; when the carrier 30 is in the second position, it is the position farthest from the test seat 20 along the first direction Z.

[0047] See also Figure 1 , Figure 5 and Figure 6 In some embodiments, the lifting assembly 51 includes a first connecting rod 511 and a second connecting rod 512. The first connecting rod 511 is rotatably connected to the second connecting rod 512 via a first connecting shaft 513. The first connecting rod 511 is rotatably connected to the carrier 30 via a second connecting shaft 514. The second connecting rod 512 is rotatably connected to the base 10 via a third connecting shaft 515. The axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are all parallel to the second direction Y. And along the first direction Z, the first connecting shaft 513 is located between the second connecting shaft 514 and the third connecting shaft 515. Figure 2 and Figure 3 As shown, when the carrier 30 moves from the second position to the first position, the angle between the plane where the axis of the first connecting shaft 513 and the axis of the second connecting shaft 514 are located and the third direction X gradually increases.

[0048] Among them, under the mutual constraint of each structure, when one of the first connecting rod 511 and the second connecting rod 512 is rotated by force, the first connecting rod 511 and the second connecting rod 512 will rotate in conjunction, so that the second connecting shaft 514 and the third connecting shaft 515 can approach or move away from each other in the first direction Z, so as to drive the carrier 30 away from or close to the test seat 20 along the first direction Z. And the first connecting shaft 513 is located between the second connecting shaft 514 and the third connecting shaft 515 along the first direction Z, so if the second connecting shaft 514 and the third connecting shaft 515 approach each other along the first direction Z, the carrier 30 moves away from the test seat 20; if the second connecting shaft 514 and the third connecting shaft 515 move away from each other along the first direction Z, the carrier 30 moves close to the test seat 20.

[0049] The carrier 30 can only move along the first direction Z. Therefore, the direction of the mutual force between the carrier 30 and the first connecting rod 511 is parallel to the first direction Z. When the carrier 30 is pushed to move closer to the test base 20, the angle between the first connecting rod 511 and the carrier 30 gradually increases, that is, the angle between the plane where the axes of the first connecting shaft 513 and the second connecting shaft 514 are located and the third direction X gradually increases. Therefore, the change trend of the component force of the force required to push the first connecting rod 511 in the third direction X is gradually decreasing. If the mutual force between the carrier 30 and the first connecting rod 511 remains unchanged, the change trend of the total force required to push the first connecting rod 511 is gradually decreasing.

[0050] Therefore, during the process of the interface to be tested of the circuit board and the test interface 201 of the test module 200 being switched from non-plugged to plugged, the force exerted on the circuit board by the test module 200 is transmitted to the first connecting rod 511 through the carrier 30. When the first connecting rod 511 is pushed and suddenly increased resistance is encountered, the component force of the suddenly increased resistance corresponding to the third direction X still has a gradually decreasing trend, so that the total force required to push the first connecting rod 511 gradually decreases, thereby reducing the influence of the suddenly increased resistance on controlling the movement of the carrier 30; and before the first connecting rod 511 encounters the suddenly increased resistance, a part of the total force required to push the first connecting rod 511 has already decreased, which can "digest" at least part of the suddenly increased resistance. Therefore, from the overall process of controlling the movement of the carrier 30, the overall range change of the force magnitude for controlling the movement of the carrier 30 by the lifting component 51 is reduced, thereby alleviating the influence of the suddenly increased resistance when moving the circuit board.

[0051] In the related art, to facilitate the separation of the circuit board and the test module 200, the test module 200 is provided with an elastic member 202 to assist in pushing the circuit board when the circuit board and the test module 200 are separated, so that the interface to be tested and the test interface 201 can be smoothly separated. Therefore, when the circuit board and the test module 200 are plugged into each other, the elastic member 202 is compressed and applies an elastic force to the circuit board, thereby hindering the circuit board from approaching the test module 200. For example, if 12 elastic members 202 are provided and each generates an elastic force of 20 N, then a driving force of 240 N is required to overcome the elastic force of the elastic members 202 during the test. Therefore, the suddenly increased resistance encountered during the process of moving the circuit board closer to the test module 200 will be further increased, which is not conducive to the operation of the user.

[0052] See Figure 2 and Figure 3 , in some embodiments, when the carrier 30 is in the second position, the distance between the carrier 30 and the test base 20 satisfies that the elastic member 202 of the circuit board and the test module 200 is not in contact.

[0053] During the process of the carrier 30 moving from the second position to the first position, the elastic member 202 contacts the circuit board prior to the test interface 201. Therefore, by gradually increasing the angle between the first connecting rod 512 and the carrier 30, that is, by gradually increasing the angle between the plane where the axes of the first connecting shaft 513 and the second connecting shaft 514 are located and the third direction X, at least part of the newly added resistance due to the elastic deformation of the elastic member 202 can be "digested". Thus, from the perspective of the overall process of controlling the movement of the carrier 30, it is beneficial to alleviate the impact of a sudden increase in resistance when moving the circuit board.

[0054] See Figure 2 , Figure 5 and Figure 6 , in some embodiments, when the carrier 30 moves to the first position, the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are coplanar.

[0055] When the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are coplanar, the interaction force between the first connecting rod 511 and the second connecting rod 512 has no component force in the direction perpendicular to the plane where the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are located. Therefore, at this time, the second connecting rod 512 can be driven to rotate without having to overcome the resistance exerted by the first connecting rod 511 on the second connecting rod 512. On the one hand, it is convenient to drive the second connecting rod 512 to rotate with a relatively small force, so that it is very easy to move the carrier 30 from the first position to the second position; on the other hand, it is convenient to lock the position of the second connecting rod 512 with a relatively small force, so that it is very easy to maintain the carrier 30 at the first position, facilitating the stable plugging and matching between the interface to be tested and the test interface 201.

[0056] It can be understood that in some embodiments, the coplanarity of the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 means that the three are approximately in the same plane. The component force of the interaction force between the first connecting rod 511 and the second connecting rod 512 in the direction perpendicular to the plane where the axes of the second connecting shaft 514 and the third connecting shaft 515 are located is very small, and the obstruction to the control of the second connecting rod 512 is also very small. As an exemplary example, when the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are coplanar, the angle between the plane where the axes of the first connecting shaft 513 and the second connecting shaft 514 are located and the plane where the axes of the first connecting shaft 513 and the third connecting shaft 515 are located is 160° - 180°.

[0057] In some embodiments, when the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are coplanar, the plane where the axes of the first connecting shaft 513, the second connecting shaft 514, and the third connecting shaft 515 are located is parallel to the first direction Z.

[0058] At this time, the acting force direction of the carrier 30 on the first connecting rod 511 and the acting force direction of the first connecting rod 511 on the second connecting rod 512 are both parallel to the first direction Z. Therefore, the acting force applied to the first connecting rod 511 by the carrier 30 has no component force in the direction perpendicular to the plane where the axes of the first connecting shaft 513 and the second connecting shaft 514 are located. It is difficult for the acting force applied to the first connecting rod 511 by the carrier 30 to cause the first connecting rod 511 to have a tendency to rotate relative to the carrier 30. Thus, it is more convenient to drive the second connecting rod 512 to rotate with a smaller force, and it is also more convenient to lock the position of the second connecting rod 512 with a smaller force.

[0059] See Figure 1 、 Figure 4 and Figure 5 In some embodiments, there are multiple lifting assemblies 51. The multiple lifting assemblies 51 are spaced apart along the third direction X. The lifting mechanism 50 further includes a linkage rod 52. The multiple lifting assemblies 51 are connected to the linkage rod 52 so that the first connecting rods 511 in the multiple lifting assemblies 51 act synchronously.

[0060] Setting multiple lifting assemblies 51 at intervals disperses the force application positions for moving the carrier 30, which is beneficial to the stable movement of the carrier 30. By providing the linkage rod 52, the multiple lifting assemblies 51 can act synchronously. On the one hand, it is beneficial to simplify the structure and operation for controlling the movement of the lifting mechanism 50. On the other hand, it is beneficial to reduce the occupied space of the lifting mechanism 50 and improve the overall space utilization rate of the test fixture 100.

[0061] It can be understood that in some embodiments, when there are multiple lifting mechanisms 50, the lifting mechanisms 50 are distributed along the second direction Y, and the multiple lifting assemblies 51 in the same lifting mechanism 50 are distributed along the third direction X. Among them, Figure 1 As shown, there are two lifting assemblies 51 in the same lifting mechanism 50. In other embodiments, the number of lifting assemblies 51 in the same lifting mechanism 50 can also be set to three or more. And the distribution direction of the lifting mechanisms 50 is different from the distribution direction of the lifting assemblies 51 in the same lifting mechanism 50, which can further disperse the force application positions on the carrier 30 and is beneficial to the stable movement of the carrier 30.

[0062] In some embodiments, the linkage rod 52 is connected to the first connecting shafts 513 of the lifting assemblies 51 distributed along the third direction X and is rotatably arranged relative to the first connecting rod 511 and the second connecting rod 512.

[0063] The first connecting rod 511 rotates relative to the carrier 30 about the second connecting shaft 514, and the second connecting rod 512 rotates relative to the base 10 about the third connecting shaft 515. The linkage rod 52 is connected to the first connecting shaft 513, and thus is at the maximum force arm for driving the first connecting rod 511 and the second connecting rod 512 to rotate, reducing the resistance when controlling the movement of each lifting assembly 51.

[0064] In other embodiments, the linkage rod 52 is rotatably connected to the first connecting rod 511 of each lifting assembly 51, or the second connecting rod 512 of each lifting assembly 51.

[0065] See Figures 1 to 3 , in some embodiments, the test fixture 100 further includes a guiding mechanism 40. The guiding mechanism 40 is configured to guide the carrier 30 to move along the first direction Z. The guiding mechanism 40 includes a guiding rod 41 and a sliding sleeve 42. The guiding rod 41 connects the base 10 and the test seat 20. The sliding sleeve 42 is sleeved on the guiding rod 41 and is configured to slide relative to the guiding rod 41 along the first direction Z. The sliding sleeve 42 and the carrier 30 are fixedly connected.

[0066] The relative positions of the guiding rod 41, the base 10 and the test seat 20 are fixed. The carrier 30 can slide along the guiding rod 41 through the sliding sleeve 42, thereby improving the accuracy of the position of the carrier 30 relative to the base 10 and the test seat 20 when moving. Moreover, the guiding rod 41, the base 10 and the test seat 20 are connected to form an integral body, improving the stability of the relative position of the guiding rod 41, which is beneficial to alleviating the influence of the component of the acting force applied by the first connecting rod 511 to the carrier 30 along the third direction X on the guiding rod 41.

[0067] It can be understood that in some embodiments, there are multiple guiding mechanisms 40. The multiple guiding rods 41 are spaced apart along the second direction Y, and the multiple guiding rods 41 are spaced apart along the third direction X, which is beneficial to improving the stability of the relative positions of the base 10 and the test seat 20, as well as the stability of the sliding of the carrier 30. As an exemplary example, the guiding rods 41 pass through the four corners of the carrier 30.

[0068] In other embodiments, the guiding mechanism 40 can be omitted. The first connecting rod 511 and the second connecting rod 512 can be connected between the base 10 and the carrier 30 in the manner of a "scissor lift platform", so as to directly restrict the movement of the carrier 30 along the first direction Z.

[0069] See Figure 1 , Figure 4 and Figure 7 , in some embodiments, the test fixture 100 further includes a driving mechanism 60. The driving mechanism 60 includes a driving assembly 61. The driving assembly 61 is connected to the second connecting rod 512 and is configured to drive the second connecting rod 512 to rotate relative to the base 10.

[0070] By setting the driving mechanism 60, the first connecting rod 511 and the second connecting rod 512 can be driven to rotate, so as to realize the control of the movement of the carrier 30 close to or away from the test seat 20. Among them, the driving assembly 61 of the driving mechanism 60 is connected to the second connecting rod 512. The driving assembly 61 drives the second connecting rod 512 to rotate, so that the first connecting rod 511 and the second connecting rod 512 are rotated in conjunction, thereby moving the carrier 30. When the first connecting rod 511 and the second connecting rod 512 are in linkage, the first connecting shaft 513 and the second connecting shaft 514 will both move in the first direction Z, so that the movement of the first connecting rod 511 is a combination of rotation and translation. If it is connected and matched with the driving assembly 61, the connection structure between the two is relatively complicated, and the movement of the driving assembly 61 is increased, and it is relatively difficult to set the driving assembly 61.

[0071] When the first connecting rod 511 and the second connecting rod 512 move in linkage, the relative position of the third connecting shaft 515 is fixed, and the first connecting shaft 513 rotates around the third connecting shaft 515, so that the second connecting rod 512 only rotates around the third connecting shaft 515. The action logic and path are simple, which facilitates the connection and coordination between the driving component 61 and the second connecting rod 512, and simplifies the structure of the driving component 61, thereby facilitating the control of the action of the lifting component 51 through the driving component 61.

[0072] In some embodiments, there are multiple lifting mechanisms 50. The multiple lifting mechanisms 50 are spaced apart along the second direction Y. There are multiple drive assemblies 61. Each lifting mechanism 50 is connected to a drive assembly 61. The drive mechanism 60 also includes a transmission rod 62. The multiple drive assemblies 61 are connected to the transmission rod 62 so that when one of the multiple drive assemblies 61 moves, the other multiple drive assemblies 61 move synchronously. Figure 1 There are two lifting mechanisms 50 shown in the figure. In other embodiments, there may be three or more lifting mechanisms 50.

[0073] Multiple lifting mechanisms 50 are arranged at intervals to disperse the force positions for moving the carrier 30, which is conducive to the stable movement of the carrier 30. By arranging a transmission rod 62, multiple driving components 61 can be moved synchronously, thereby driving multiple lifting mechanisms 50 to move synchronously, which is conducive to simplifying the operation of controlling the movement of the driving mechanism 60, and on the other hand, it is conducive to reducing the space occupied by the driving mechanism 60, thereby improving the overall space utilization of the test fixture 100.

[0074] It is understandable that in some embodiments, in the same lifting mechanism 50, one lifting assembly 51 is connected to the driving assembly 61. The driving assembly 61 drives the lifting assembly 51 connected thereto to move, and drives other lifting assemblies 51 to move through the linkage rod 52, which is conducive to simplifying the structure of the driving mechanism 60 and improving the space utilization of the test fixture 100.

[0075] In some embodiments, the driving assembly 61 includes a first driving rod 611 and a second driving rod 612. The first driving rod 611 is rotatably connected to the second driving rod 612 through a first driving shaft 613. The first driving rod 611 is rotatably connected to the base 10 through a second driving shaft 614. The first driving rod 611 is used to receive force to rotate relative to the base 10. The second driving rod 612 is rotatably connected to the second connecting rod 512 through a third driving shaft 615. The axis of the first driving shaft 613, the axis of the second driving shaft 614, and the axis of the third driving shaft are all parallel to the second direction Y.

[0076] The first driving rod 611, the second driving rod 612 and the second connecting rod 512 form a connecting rod matching structure relative to the base 10, simplifying the structure for driving the second connecting rod 512 to rotate, so as to reduce the difficulty of realizing the driving component 61 to control the movement of the lifting component 51. Among them, when the first driving rod 611, the second driving rod 612 and the second connecting rod 512 act in conjunction, the first driving shaft 613 and the second driving shaft 614 will both move in the first direction Z and the third direction X, so the movement of the second driving rod 612 is more complicated. If the second driving rod 612 is used to move due to force, the action for controlling the movement of the second driving rod 612 is more complicated, which increases the difficulty of controlling the rotation of the second connecting rod 512.

[0077] When the first driving rod 611, the second driving rod 612 and the second connecting rod 512 move in linkage, the relative position of the second driving shaft 614 is fixed, and the first driving shaft 613 rotates around the second driving shaft 614, so that the movement of the first driving rod 611 is only to rotate around the second driving shaft 614. The movement logic and path are simple, which makes it easy to control the movement of the first driving rod 611, thereby facilitating the control of the movement of the lifting assembly 51 through the driving assembly 61.

[0078] In other embodiments, the first driving rod 611 and the second driving rod 612 may be omitted, and the driving assembly 61 may also be a structure such as a synchronous belt or a chain to drive the second connecting rod 512 to rotate.

[0079] It can be understood that in some embodiments, the transmission rod 62 is fixedly connected to the second drive shaft 614 of each drive assembly 61 distributed along the second direction Y, and the first drive rods 611 connected thereto are rotated in conjunction with each other by rotating around its own axis, which is beneficial to reduce the space required for the transmission rod 62 to move, thereby facilitating the arrangement of other structures of the test fixture 100. In other embodiments, the transmission rod 62 can be fixedly connected to the second connecting rod 512 of each drive assembly 61 or the middle of the first connecting rod 511.

[0080] See also Figure 1 , Figure 4 and Figure 7, in some embodiments, when the first connecting rod 511 rotates and the included angle between the first connecting rod 511 and the carrier 30 gradually decreases, the included angle between the first driving rod 611 and the second driving rod 612 gradually increases. Combining with Figure 2 and Figure 3 shown, that is, when the first connecting rod 511 rotates and the included angle between the plane where the axes of the first connecting shaft 513 and the second connecting shaft 514 are located and the third direction X gradually decreases, the included angle between the plane where the axes of the first driving shaft 613 and the third driving shaft 615 are located and the plane where the axes of the second driving shaft 614 and the third driving shaft 615 are located gradually decreases.

[0081] When the included angle between the first connecting rod 511 and the carrier 30 gradually decreases, that is, when the included angle between the plane where the axes of the first connecting shaft 513 and the second connecting shaft 514 are located and the third direction X gradually decreases, if during the period when the test module 200 applies a force to the circuit board, the component force of the force applied by the first connecting rod 511 to the second connecting rod 512 in the third direction X has a gradually increasing trend, and if during the period when the test module 200 does not apply a force to the circuit board, the component force of the force applied by the first connecting rod 511 to the second connecting rod 512 in the third direction X also has a gradually increasing trend. Therefore, ignoring the influence brought by the test module 200 applying a force to the circuit board, the total force applied by the first connecting rod 511 to the second connecting rod 512 generally has an increasing trend, and then the force applied by the second connecting rod 512 to the second driving rod 612 has an increasing trend.

[0082] When the included angle between the first driving rod 611 and the second driving rod 612 gradually increases, that is, when the included angle between the plane where the axes of the first driving shaft 613 and the third driving shaft 615 are located and the plane where the axes of the second driving shaft 614 and the third driving shaft 615 are located gradually decreases, the component force of the force required to drive the second driving rod 612 in the direction perpendicular to the plane where the axes of the second driving shaft 614 and the third driving shaft 615 are located gradually decreases. If the force received by the second driving rod 612 from the second connecting rod 512 is constant, then the total force to drive the second driving rod 612 through the first driving rod 611 can be reduced. Therefore, the change trend of the magnitude of the force applied by the second connecting rod 512 to the second driving rod 612 is opposite to the change trend of the magnitude of the force that the first driving rod 611 trends the second driving rod 612 to move, which is beneficial to maintaining the force applied to the first driving rod 611 to make the first driving rod 611 rotate at a relatively stable magnitude, so as to reduce the difficulty of controlling the movement of the first driving rod 611.

[0083] See Figure 3 、 Figure 4 and Figure 7, in some embodiments, when the carrier 30 moves to the second position, the axes of the first drive shaft 613, the second drive shaft 614, and the third drive shaft 615 are coplanar.

[0084] When the axes of the first drive shaft 613, the second drive shaft 614, and the third drive shaft 615 are coplanar, the interaction force between the first drive rod 611 and the second drive rod 612 has no component force in the direction perpendicular to the plane where the axes of the first drive shaft 613, the second drive shaft 614, and the third drive shaft 615 are located. Therefore, at this time, the first drive rod 611 can be driven to rotate without having to overcome the resistance exerted by the second drive rod 612 on the first drive rod 611. On the one hand, it is convenient to drive the first drive rod 611 to rotate with a relatively small force, so that the carrier 30 can easily move from the second position to the first position; on the other hand, it is convenient to lock the position of the first drive rod 611 with a relatively small force, so that the carrier 30 can easily be maintained at the second position, facilitating the assembly of the circuit board and the carrier 30.

[0085] It can be understood that in some embodiments, the coplanarity of the axes of the first drive shaft 613, the second drive shaft 614, and the third drive shaft 615 means that the three are approximately in the same plane. The component force of the interaction force between the first drive rod 611 and the second drive rod 612 in the direction perpendicular to the plane where the axes of the second drive shaft 614 and the third drive shaft 615 are located is very small, and the obstruction to the control of the first drive rod 611 is also very small. As an exemplary example, when the axes of the first drive shaft 613, the second drive shaft 614, and the third drive shaft 615 are coplanar, the angle between the plane where the axes of the first drive shaft 613 and the second drive shaft 614 are located and the plane where the axes of the first drive shaft 613 and the third drive shaft 615 are located is 160° - 180°.

[0086] See Figure 4 , Figure 6 and Figure 8 , in some embodiments, the third drive shaft 615 passes through the second connecting rod 512. And both ends of the third drive shaft 615 extend out of both sides of the second connecting rod 512. The second drive rod 612 has two drive arms 6121. The two drive arms 6121 are respectively rotatably connected to both ends of the third drive shaft 615. The second drive rod 612 is bent away from the second connecting rod 512.

[0087] Two driving arms 6121 are located on both sides of the second driving rod 612, so as to facilitate the balanced force on the third driving shaft 615 with respect to the second driving rod 612 and the second connecting rod 512, which is beneficial to avoiding the rotational tendency of the end of the third driving shaft 615 along its radial direction, reducing the loss of the acting force when the second driving rod 612 drives the second connecting rod 515 to rotate, and thus making it easier for the user to control the movement of the carrier 30. When the carrier 30 moves to the second position, the second driving rod 612 gradually abuts against the second connecting rod 512. The second driving rod 612 is arranged in a bent structure to avoid the structures of the second connecting rod 512 and the third connecting shaft 515, which is beneficial to making the included angle between the second connecting rod 512 and the base 10 smaller, that is, making the included angle between the plane where the axes of the first connecting shaft 513 and the third connecting shaft 515 are located and the third direction X smaller, so that the carrier 30 is farther away from the test seat 20 when moving to the second position, facilitating the user to disassemble and assemble the circuit board.

[0088] See Figure 1 、 Figure 4 and Figure 7 , in some embodiments, the driving mechanism 60 further includes a control rod 63. The control rod 63 is fixedly connected to the first driving rod 611, and the control rod 63 is used to be stressed to drive the first driving rod 611 to rotate relative to the base 10.

[0089] By providing the control rod 63, the setting position of the structure for the driving mechanism 60 to be stressed can be transferred, which is beneficial to reducing the possibility of interfering with or hindering the linkage cooperation between the driving component 61 and the lifting component 51, and thus facilitating the stable control of the movement of the carrier 30 close to or away from the test seat 20.

[0090] In some embodiments, one end of the control rod 63 is fixedly connected to the second driving shaft 614, and the control rod 63 rotates synchronously with the first driving rod 611. By controlling the rotation of the control rod 63, the rotation of the first driving rod 611 can be controlled, and their action logics are the same, which is convenient for the user to operate.

[0091] In some embodiments, the length of the control rod 63 is greater than the distance between the first driving shaft 613 and the second driving shaft 614, and the farthest distance between the stressed part of the control rod 63 and the second driving shaft 614 is greater than the distance between the first driving shaft 613 and the second driving shaft 614, thereby reducing the acting force required for the user to drive the first driving rod 611 through the control rod 63.

[0092] See Figure 1 、 Figure 7 and Figure 9, in some embodiments, the driving mechanism 60 further includes a positioning seat 64 and a positioning pin 65. The positioning seat 64 is provided on the carrier seat 30. The positioning seat 64 is provided with a moving channel 641. The moving channel 641 is an arc segment with the rotation axis of the control rod 63 as the axis. And the moving channel 641 has a first positioning portion 6411 and a second positioning portion 6412. The first positioning portion 6411 and the second positioning portion 6412 are respectively recessed along the rotation radius direction of the control rod 63. The control rod 63 has a strip-shaped hole 631 extending along its own rotation radius direction. The positioning pin 65 is simultaneously inserted through the moving channel 641 and the strip-shaped hole 631 along the rotation axis of the control rod 63. When the control rod 63 rotates, it drives the positioning pin 65 to move along the moving channel 641.

[0093] Combined with Figure 2 As shown, when the carrier seat 30 moves to the first position, the positioning pin 65 can move to the first positioning portion 6411 to lock the relative position of the control rod 63. Combined with Figure 3 As shown, when the carrier seat 30 moves to the second position, the positioning pin 65 can move to the second positioning portion 6412 to lock the relative position of the control rod 63.

[0094] It can be understood that, in some embodiments, the moving channel 641 restricts the movement range of the positioning pin 65 to restrict the movement range of the control rod 63, so as to restrict the movement of the carrier seat 30 between the first position and the second position.

[0095] In some embodiments, the driving mechanism 60 further includes a reset member 66. The reset member 66 is provided between the positioning pin 65 and the control rod 63. The reset member 66 is used to apply a force to the positioning pin 65 to make the positioning pin 65 move along the rotation radius direction of the control rod 63 within the strip-shaped hole 631.

[0096] Combined with Figure 2 As shown, when the carrier seat 30 moves to the first position, the positioning pin 65 is driven by the reset member 66 and automatically moves to the first positioning portion 6411 to realize the automatic locking of the carrier seat 30 at the first position. Combined with Figure 3 As shown, when the carrier seat 30 moves to the second position, the positioning pin 65 is driven by the reset member 66 and automatically moves to the second positioning portion 6412 to realize the automatic locking of the carrier seat 30 at the second position.

[0097] It can be understood that, in some embodiments, the reset member 66 is a threaded spring, and the elastic force generated by elastic deformation drives the positioning pin 65 to move.

[0098] See Figure 1 and Figure 4, in some embodiments, one or more of the first connecting rod 511, the second connecting rod 512, the first driving rod 611, the second driving rod 612, the linkage rod 52, the transmission rod 62, and the control rod 63 have a hollow structure to reduce their own weight, which is conducive to reducing the force required to control the movement of the carrier base 30.

[0099] See Figure 1 and Figure 4 , in some embodiments, the test fixture 100 further includes a limiting member 70. The limiting member 70 is fixedly arranged relative to the base 10. The limiting member 70 is used to stop the carrier base 30 from continuing to move closer to the test base 20 when the carrier base 30 moves to the first position.

[0100] By setting the limiting member 70 to stop the movement of the carrier base 30, it is convenient to determine whether the carrier base 30 has moved to the first position, and the operation of controlling the insertion of the interface to be tested and the test interface 201 in place is simplified. And after the carrier base 30 moves to the first position, by continuing to apply a force to the carrier base 30 to make it move closer to the test base 20, the carrier base 30 can be maintained at the first position in cooperation with the limiting member 70, and the operation is simple.

[0101] Combined with Figure 1 As shown, in some embodiments, when the carrier base 30 moves to the first position, the limiting member 70 abuts against the lifting assembly 51 to stop the first connecting rod 511 and the second connecting rod 512 from continuing to rotate in the direction that increases the angle between the first connecting rod 511 and the second connecting rod 512, that is, to stop the first connecting rod 511 and the second connecting rod 512 from continuing to rotate in the direction that makes the second connecting shaft 514 and the third connecting shaft 515 move away from each other.

[0102] The lifting assembly 51 is actuated by force, thereby driving the movement of the carrier base 30. The limiting member 70 abuts against the lifting assembly 51, enabling the lifting assembly 51 to be simultaneously subjected to the driving force that drives its movement and the resistance force that stops its movement by the limiting member 70. The lifting assembly 51 can be balanced by force without transmitting the force through other structures, and it is easier to stabilize the posture of the lifting assembly 51, which is beneficial to stabilizing the carrier base 30 at the first position.

[0103] In other embodiments, the limiting member 70 can be arranged on the guide rod 41 or the test base 20 to directly abut against the carrier base 30 to stop the movement of the carrier base 30.

[0104] See Figure 1 and Figure 4 , in some embodiments, the test fixture 100 further includes an auxiliary lifting member 80. The auxiliary lifting member 80 is arranged on the base 10 and is used to apply a force to the carrier base 30 to make the carrier base 30 move in the direction closer to the test base 20.

[0105] By providing the auxiliary lifting member 80, the force applied to the test fixture 100 to move the carrier 30 closer to the test base 20 can be reduced. During the process of the interface under test of the circuit board being switched from non-inserted to inserted with the test interface 201 of the test module 200, the auxiliary lifting member 80 can help overcome the resistance of the test module 200 acting on the circuit board to hinder the carrier 30 from approaching the test base 20, thereby reducing the difficulty of inserting the interface under test and the test interface 201. Moreover, during the process of the interface under test of the circuit board being switched from inserted to non-inserted with the test interface 201 of the test module 200, the original resistance of the test module 200 acting on the circuit board to hinder the carrier 30 from approaching the test base 20 can be used in the reverse direction to assist in counteracting the force applied by the auxiliary lifting member 80, which is beneficial to reducing the difference in magnitude between the force applied to the test fixture 100 to move the carrier 30 from the first position to the second position and the force applied to the test fixture 100 to move the carrier 30 from the second position to the first position, thereby facilitating the user to control the switching action of the carrier 30 between the first position and the second position more stably.

[0106] In some embodiments, the auxiliary lifting member 80 is connected between the base 10 and the lifting assembly 51. The auxiliary lifting member 80 has a telescopic structure. The auxiliary lifting member 80 is configured to extend to apply a force to the lifting assembly 51, so that the first connecting rod 511 and the second connecting rod 512 rotate in a direction to increase the angle between the first connecting rod 511 and the second connecting rod 512, that is, to rotate the first connecting rod 511 and the second connecting rod 512 in a direction to move the second connecting shaft 514 and the third connecting shaft 515 away from each other.

[0107] The lifting assembly 51 is actuated by the force, thereby driving the carrier 30 to move. The auxiliary lifting member 80 applies a force to the lifting assembly 51 to assist the carrier 30 in moving closer to the test base 20, enabling a plurality of forces to form a resultant force at the lifting assembly 51, so that the lifting assembly 51 can be in force balance without transmitting the force through other structures, making it easier to stabilize the attitude of the lifting assembly 51 and facilitating the stable driving of the carrier 30 to move.

[0108] It can be understood that in some embodiments, when the carrier 30 moves to the first position, the auxiliary lifting member 80 pushes the lifting assembly 51 and causes the lifting assembly 51 to abut against the limiting member 70, thereby maintaining the carrier 30 at the first position.

[0109] Figure 3The structure of the driving assembly 61 shown in the figure is such that the angle between the plane where the axis of the first driving shaft 613 and the axis of the second driving shaft 614 are located and the plane where the axis of the first driving shaft 613 and the axis of the third driving shaft 615 are located is less than 180°, and the angle opening faces the base 10 side along the first direction Z. Usually, when the test vehicle is in use, the first direction Z is parallel to the gravity direction. A certain gravity will be generated by the circuit board, the carrier 30, a part of the structure of the lifting assembly 51, and a part of the structure of the driving assembly 61. After this part of the gravity interacts with the auxiliary force provided by the auxiliary lifting member, the first driving rod 611 and the second driving rod 612 can be maintained in this state, so that the driving assembly 61 can be locked in this state with a very small force.

[0110] In some embodiments, one end of the auxiliary lifting member 80 is rotatably connected to the carrier 30, and the other end is rotatably connected to the first connecting shaft 513. The auxiliary lifting member 80 acts at the maximum force arm for driving the first connecting rod 511 and the second connecting rod 512 to rotate, reducing the loss of the force for the auxiliary lifting member 80 to assist in controlling the movement of the lifting assembly 51.

[0111] In other embodiments, one end of the auxiliary lifting member 80 is rotatably connected to the carrier 30, and the other end can be rotatably connected to the carrier 30, or the middle of the first connecting rod 511, or the middle of the second connecting rod 512, etc.

[0112] In some embodiments, the auxiliary lifting member 80 is a gas spring. In other embodiments, the auxiliary lifting member 80 can also be a spiral spring or other structures.

[0113] In addition, those of ordinary skill in the art of this technology should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. As long as it is within the scope of the substantial spirit of the present application, appropriate changes and variations made to the above embodiments fall within the scope of the disclosure of the present application.

Claims

1. A test fixture, characterized in that, Comprising: Base; Test base, oppositely arranged with the base along a first direction, the test base being used for carrying a test module, and the test module being used for testing a circuit board; Carrier base, arranged between the base and the test base along the first direction, and the carrier base being used for carrying the circuit board; Lifting mechanism, including a lifting component, the lifting component being used for driving the carrier base to move to a first position or a second position, the lifting component including a first connecting rod and a second connecting rod, the first connecting rod being rotatably connected to the second connecting rod, the first connecting rod being rotatably connected to the carrier base, the second connecting rod being rotatably connected to the base, when the carrier base is in the first position, enabling the to-be-tested interface of the circuit board to be plugged into the test interface of the test module; when the carrier base is in the second position, enabling the to-be-tested interface to be separated from the test interface; Driving mechanism, including a driving component, the driving component being used for driving the second connecting rod to rotate relative to the base, the driving component including a first driving rod and a second driving rod, the first driving rod being rotatably connected to the second driving rod, the first driving rod being rotatably connected to the base, the first driving rod being used for being stressed to rotate relative to the base, the second driving rod being rotatably connected to the second connecting rod, When the first connecting rod rotates and the included angle between the first connecting rod and the carrier base gradually decreases, the included angle between the first driving rod and the second driving rod gradually increases.

2. The test fixture according to claim 1, characterized in that, The driving mechanism further includes a control rod, the control rod and the first driving rod being fixedly connected, the control rod being used for being stressed to drive the first driving rod to rotate relative to the base.

3. The test fixture according to claim 1, wherein, A plurality of the lifting mechanisms are provided, and the plurality of lifting mechanisms are distributed at intervals. A plurality of the driving components are provided, each of the lifting mechanisms being connected to one of the driving components. The driving mechanism further includes a transmission rod, and the plurality of driving components are connected to the transmission rod, so that when one of the plurality of driving components acts, the others of the plurality of driving components act synchronously; In each of the lifting mechanisms, a plurality of the lifting components are provided, and the plurality of lifting components are distributed at intervals, and the distribution direction of the plurality of lifting mechanisms intersects with the distribution direction of the plurality of lifting components in the same lifting mechanism. The lifting mechanism further includes a linkage rod, and the plurality of lifting components are connected to the linkage rod, so that the first connecting rods in the plurality of lifting components act synchronously.

4. The test fixture according to claim 1, wherein The first connecting rod and the second connecting rod are rotatably connected through a first connecting shaft, the first connecting rod and the carrier base are rotatably connected through a second connecting shaft, the second connecting shaft and the base are rotatably connected through a third connecting shaft. When the carrier base moves to the first position, the axes of the first connecting shaft, the second connecting shaft and the third connecting shaft are coplanar; And / or The first driving rod and the second driving rod are rotationally connected through a first driving shaft. The first driving rod and the base are rotationally connected through a second driving shaft. The second driving rod and the second connecting rod are rotationally connected through a third driving shaft. When the carrier moves to the second position, the axes of the first driving shaft, the second driving shaft, and the third driving shaft are coplanar.

5. The test fixture according to claim 4, characterized in that, When the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are coplanar, the plane where the axes of the first connecting shaft, the second connecting shaft, and the third connecting shaft are located is parallel to the first direction.

6. The test fixture according to any one of claims 1 to 5, characterized in that The test fixture further includes a guiding mechanism. The guiding mechanism includes a guiding rod and a sliding sleeve. The guiding rod connects the base and the test seat. The sliding sleeve is sleeved on the guiding rod and is used to slide relative to the guiding rod along the first direction. The sliding sleeve and the carrier are fixedly connected.

7. The test fixture according to any one of claims 1 to 5, characterized in that The test fixture further includes a limiting member. The limiting member is fixedly arranged relative to the base. The limiting member is used to stop the carrier from moving closer to the test seat when the carrier moves to the first position.

8. The test fixture according to claim 7, characterized in that, When the carrier moves to the first position, the limiting member abuts against the lifting assembly to stop the first connecting rod and the second connecting rod from continuing to rotate in the direction that increases the angle between the first connecting rod and the second connecting rod.

9. The test fixture according to any one of claims 1 to 5, characterized in that The test fixture further includes an auxiliary lifting member. The auxiliary lifting member is arranged on the base and is used to apply a force to the carrier to move the carrier in the direction close to the test seat.

10. The test fixture according to claim 9, characterized in that, The auxiliary lifting member is connected between the base and the lifting assembly. The auxiliary lifting member has a telescopic structure. The auxiliary lifting member is used to extend to apply a force to the lifting assembly so that the first connecting rod and the second connecting rod rotate in the direction that increases the angle between the first connecting rod and the second connecting rod.

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