Test device

Abstract

The application discloses a kind of testing devices, it is related to testing device technical field, wherein, testing device includes workbench, positioning tool, moving assembly, range finder, transmission assembly and magnetic hysteresis brake, positioning tool is installed to workbench, moving assembly includes sliding frame, calibration piece and force sensor, sliding frame includes first support and second support, first support is connected with the moving block of workpiece to be measured, second support is slidably installed on workbench, calibration piece is installed in first support or second support and can slide together with it;Force sensor one end is connected to first support, the other end is connected to second support;Range finder is used to measure the sliding distance of calibration piece;Transmission assembly includes gear and rack that are engaged with each other, rack is installed to second support;Magnetic hysteresis brake is drivingly connected with gear, and magnetic hysteresis brake is used to provide the resistance that prevents gear rotation.The application can improve the displacement adjustment precision of intelligent wearable device lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a testing device. BACKGROUND

[0002] In the adjustment process of intelligent wearable devices, such as VR (Virtual Reality), the adjustment of the interpupillary distance is achieved by driving a moving block to move along a sliding shaft. However, in the related art, there is a large gap between the actual adjustment distance and the ideal adjustment distance of the lens of the intelligent wearable device, and the adjustment accuracy is low. SUMMARY

[0003] The main purpose of the present application is to provide a testing device, which aims to solve the technical problem of low adjustment accuracy of the lens of the intelligent wearable device in the related art.

[0004] To achieve the above-mentioned purpose, according to some embodiments of the present application, a testing device is provided, comprising:

[0005] a workbench;

[0006] a positioning tool, which is installed on the workbench and is used to place a workpiece to be tested;

[0007] a moving assembly, which comprises a sliding frame, a calibration piece and a force sensor, the sliding frame comprises a first support and a second support, the first support is connected with a moving block of the workpiece to be tested, the second support is slidingly installed on the workbench, the calibration piece is installed on the first support or the second support and can slide together; one end of the force sensor is connected to the first support, and the other end is connected to the second support;

[0008] a range finder, which is used to measure the sliding distance of the calibration piece;

[0009] a transmission assembly, which comprises a gear and a rack that are engaged with each other, the rack is installed on the second support;

[0010] a hysteresis brake, which is in transmission connection with the gear, and is used to provide resistance to prevent the gear from rotating.

[0011] In some embodiments, the testing device further comprises a shaft coupling and a first transmission shaft, the gear is sleeved on the first transmission shaft, the hysteresis brake comprises a second transmission shaft coaxially arranged with the first transmission shaft, the shaft coupling connects the first transmission shaft and the second transmission shaft, and the central axis direction of the first transmission shaft is perpendicular to the moving direction of the rack.

[0012] In some embodiments, the moving assembly further comprises a mounting base and a threaded fastener, the mounting base is provided with a first mounting hole and an elastic pin, the first support is provided with a positioning hole and a second mounting hole, the elastic pin is arranged to extend out of the first support through the positioning hole from the bottom of the first support, and the threaded fastener is arranged to pass through the first mounting hole and the second mounting hole to connect the mounting base and the first support.

[0013] In some embodiments, the first support is provided with a plurality of positioning holes, and the elastic pin can be arranged in any of the positioning holes.

[0014] In some embodiments, the second support comprises a bottom plate and a vertical plate arranged on the bottom plate, the bottom plate is slidably connected to the workbench, the rack is arranged on the bottom plate, and one end of the force sensor is connected to the vertical plate.

[0015] In some embodiments, the first support is provided with a first blocking piece, the vertical plate is provided with a second blocking piece, one end of the force sensor is in abutment with the first blocking piece, and the other end of the force sensor is in abutment with the second blocking piece.

[0016] In some embodiments, the first blocking piece comprises two first blocking blocks arranged at intervals, a first interval is arranged between the two first blocking blocks, the second blocking piece comprises two second blocking blocks arranged at intervals, a second interval is arranged between the two second blocking blocks, and the testing device further comprises a first fastener and a second fastener, the first fastener is arranged on one end of the force sensor through the first interval, and the second fastener is arranged on the other end of the force sensor through the second interval.

[0017] In some embodiments, the bottom plate is further provided with a limiting plate extending towards the first support, a gap is arranged between the limiting plate and the bottom surface of the first support facing the workbench, and the limiting plate is used to limit the distance of the downward movement of the first support towards the limiting plate.

[0018] In some embodiments, the sliding direction of the moving block, the sliding direction of the second support, and the moving direction of the rack are the same.

[0019] In some embodiments, the positioning tool is provided with a positioning groove and a positioning column, the positioning groove is used to accommodate the workpiece to be tested, and the positioning column is used to cooperate with the hole position of the workpiece to be tested, and the testing device further comprises a pressing tool, the pressing tool comprises a pressing plate and a pressing rod arranged on the pressing plate, and the pressing plate is arranged on the workbench to insert the pressing rod on the positioning column.

[0020] In some embodiments, the number of the moving assemblies, the transmission assemblies and the hysteresis brakes are two groups and are connected one by one, and the workpiece to be tested includes two moving blocks, and one moving assembly is connected with one moving block.

[0021] In the above scheme, the test device includes a workbench, a positioning tool, a moving assembly, a distance meter, a transmission assembly and a hysteresis brake. The positioning tool is installed on the workbench and is used for placing the workpiece to be tested. The moving assembly includes a sliding frame, a calibration piece and a force sensor. The sliding frame includes a first support and a second support. The first support is connected with a moving block of the workpiece to be tested. The second support is slidingly installed on the workbench. The calibration piece is installed on the first support or the second support and can slide together. One end of the force sensor is connected with the first support, and the other end is connected with the second support. The distance meter is used for measuring the sliding distance of the calibration piece. The transmission assembly includes a gear and a rack which are engaged with each other. The rack is installed on the second support. The hysteresis brake is in transmission connection with the gear. The hysteresis brake is used to provide a resistance to prevent the gear from rotating. The hysteresis brake can provide a constant load force by adjusting the current, so as to simulate the resistance received by the moving block of the pupil distance adjustment module during the movement, thereby improving the displacement adjustment precision of the lens of the intelligent wearable device. The driving force can be controlled in a reasonable range through the force sensor. The actual displacement of the moving block can be measured through the calibration piece and the distance meter, and can be compared with the ideal displacement to detect the displacement measurement precision. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0023] Figure 1 It is a three-dimensional structure schematic diagram of the test device of the embodiment of the present application.

[0024] Figure 2 It is a structure schematic diagram of the test device of the embodiment of the present application from one perspective.

[0025] Figure 3 It is a part of the structure schematic diagram of the test device of the embodiment of the present application.

[0026] Figure 4 It is a structure schematic diagram of the transmission assembly, the shaft coupling and the hysteresis brake of the test device of the embodiment of the present application.

[0027] Figure 5 It is a part of the structure schematic diagram of the test device of the embodiment of the present application.

[0028] Figure 6 Structure diagram of a first support, a positioning pin and a mounting seat of a testing device in an embodiment of the present application;

[0029] Figure 7 Structure diagram of a positioning pin and a mounting seat of a testing device in an embodiment of the present application;

[0030] Figure 8 Structure diagram of another part of a testing device in an embodiment of the present application;

[0031] Figure 9 Structure diagram of another part of a testing device in an embodiment of the present application;

[0032] Figure 10 Structure diagram of Figure 9 .

[0033] Explanation of reference numerals:

[0034] 100, testing device; 200, workpiece to be tested; 210, moving block;

[0035] 2, workbench; 3, positioning tool; 31, positioning column; 4, sliding frame; 41, first support; 411, first blocking block; 412, first spacing; 42, second support; 421, bottom plate; 422, vertical plate; 4221, second blocking block; 4222, second spacing; 423, limiting plate; 5, first transmission shaft; 6, force sensor; 7, distance meter; 8, coupling; 9, gear; 10, rack; 11, hysteresis brake; 111, second transmission shaft; 12, mounting seat; 121, elastic space; 13, threaded part; 14, elastic pin; 141, spring; 142, pin body; 15, gap; 16, pressing tool; 161, pressing plate; 162, pressing rod; 17, calibration piece; 18, first fastener; 19, second fastener.

[0036] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0038] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0039] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0040] In the adjustment process of intelligent wearable devices such as VR (English full name: Virtual Reality, virtual reality), AR (English full name: Augmented Reality, augmented reality), MR (English full name: Mixed Reality, mixed reality), the actual adjustment distance of the lens and the ideal adjustment distance are greatly different, and the adjustment accuracy is low.

[0041] The applicant found through careful research that, taking VR as an example, in the process of moving the moving block driven by the motor, the moving block will be subjected to some resistance such as friction. Due to the existence of these resistances, after the motor output driving force is applied to the moving block, the actual displacement of the moving block will be different from the ideal displacement, which reduces the adjustment accuracy. The skilled in the art has made efforts in the direction of how to reduce resistance, but due to the complexity of the generation of system resistance, it is difficult to eliminate the friction itself, so the effect is very small.

[0042] The applicant thinks that since the system resistance cannot be avoided, can it be recognized that it exists? Through the design of a testing device, the displacement adjustment accuracy of the lens in the presence of resistance is tested.

[0043] Therefore, the applicant proposes a testing device.

[0044] Please refer to Figure 1 and Figure 2According to some embodiments of the present application, the present application provides a testing device 100, comprising a workbench 2, a positioning tool 3, a moving assembly, a distance meter 7, a transmission assembly and a hysteresis brake 11, the positioning tool 3 is installed on the workbench 2 and used for placing a workpiece 200 to be tested; the moving assembly comprises a sliding frame 4, a calibration piece 17 and a force sensor 6, the sliding frame 4 comprises a first support 41 and a second support 42, the first support 41 is connected with a moving block 210 of the workpiece 200 to be tested, the second support 42 is slidingly installed on the workbench 2, the calibration piece 17 is installed on the first support 41 or the second support 42 and can slide together; one end of the force sensor 6 is connected to the first support 41, and the other end is connected to the second support 42; the distance meter 7 is used for measuring the sliding distance of the calibration piece 17; the transmission assembly comprises a gear 9 and a rack 10 which are engaged with each other, and the rack 10 is installed on the second support 42; the hysteresis brake 11 is in transmission connection with the gear 9, and the hysteresis brake 11 is used to provide resistance to prevent the gear 9 from rotating.

[0045] With reference to Figure 1 and Figure 2 , the workbench 2 refers to a seat body on which various components are placed, and the workbench 2 can be placed on a workbench top, and the positioning tool 3 is used for positioning and placing the workpiece 200 to be tested. When the workpiece 200 to be tested is a pupil distance adjustment module, the pupil distance adjustment module is part of a smart wearable device and is used for adjusting the position of a lens. The pupil distance adjustment module comprises a driving motor and a moving block 210 connected with the driving motor, the moving block 210 is connected with a lens frame, and the lens frame is provided with a lens. Generally, the number of the driving motor and the moving block 210 is two and they are connected one by one, the moving block 210 can move along an axis, and the two moving blocks 210 are respectively connected with two lens frames, which are used for adjusting the distance between the two lenses, that is, adjusting the pupil distance.

[0046] With reference to Figure 3 , the sliding frame 4 comprises the first support 41 and the second support 42 which are connected with each other, the first support 41 is connected with the moving block 210 and can move under the driving of the moving block 210, the second support 42 is slidingly installed on the workbench 2, and the two ends of the force sensor 6 are respectively connected with the first support 41 and the second support 42, the force sensor 6 can measure the driving force of the driving motor on the moving block 210 through the pressure between the first support 41 and the second support 42, so as to detect the driving force of the motor, and the testing device 100 can judge whether the driving force is within a preset range according to the driving force value.

[0047] The distance measuring instrument 7 can be fixedly installed on the workbench 2. Specifically, the distance measuring instrument 7 can be a laser displacement meter, and the laser displacement meter has higher measurement accuracy. The calibration member 17 refers to a component for measurement by the distance measuring instrument 7. Specifically, the calibration member 17 can be a vertical rod or a vertical plate. Generally, the laser emitted by the laser distance measuring instrument 7 is horizontally emitted, and the calibration member 17 is vertically arranged. The calibration member 17 can move together with the sliding frame 4 and can be arranged on the first support 41 or the second support 42. Because the first support 41 and the second support 42 move synchronously during actual movement of the sliding frame 4, and because the sliding block is connected to the first support 41 and is used to drive the first support 41 to move, the actual displacement of the calibration member 17 is actually the displacement of the moving block 210. Thus, the actual displacement of the moving block 210 can be measured by measuring the displacement of the calibration member 17.

[0048] Referring to Figure 1 or Figure 3 In some embodiments, the number of moving assemblies, transmission assemblies, and hysteresis brakes 11 is two, and each is connected in one-to-one correspondence. The workpiece 200 to be measured includes two moving blocks 210, and each moving assembly is connected to a moving block 210. Because the number of moving blocks 210 is two, the corresponding moving assemblies, transmission assemblies, and hysteresis brakes 11 are also two, and are respectively used to provide a constant load force to the two moving blocks 210 and measure the actual displacement of the moving blocks 210, detect and adjust the measurement accuracy.

[0049] Referring to Figure 3 The rack 10 is installed on the second support 42 and can be arranged on the top of the second support 42. The rack 10 can be connected to the second support 42 by screws or can be welded to the second support 42. The rack 10 moves synchronously with the second support 42. The rack 10 performs linear motion to drive the gear 9 to rotate. The rack 10 and the gear 9 are designed to mesh with each other, so that the conversion between linear torque and rotary torque can be achieved.

[0050] The hysteresis brake 11 is in transmission connection with the gear 9. The hysteresis brake 11 is used to provide resistance to prevent the gear 9 from rotating. The hysteresis brake 11 can provide a constant resistance. The resistance is used to simulate the resistance received by the moving block 210 of the pupil distance adjustment module during movement. Thus, the displacement of the moving block 210 during actual use of the pupil distance adjustment module can be measured. Thus, the displacement of the lens can be obtained. The resistance provided by the hysteresis brake 11 is constant and will not change due to the movement of the moving block 210, which is beneficial to improve the adjustment accuracy.

[0051] The principle of the hysteresis brake 11 is described as follows.

[0052] For the hysteresis brake 11, the relationship between force and load torque is:

[0053] T = n * I;

[0054] wherein I refers to the driving current input into the hysteresis brake 11, n is a conversion coefficient, and T is the torque. It can be known that the load torque of the hysteresis brake 11 is in proportional relationship with the driving current, the hysteresis brake 11 can realize contactless torque transmission, and stable load torque control that is smooth, stepless, and independent of rotation speed can be realized. The driving current of the hysteresis brake 11 can be controlled through software, and adjustable load torque, i.e., adjustable load force, can be realized.

[0055] In the above embodiments of the present application, the hysteresis brake 11 can provide a constant and adjustable load force through adjustment of the driving current, simulate the resistance received by the moving block 210 of the pupil distance adjustment module during movement, detect and adjust the displacement of the moving block 210, and thus the displacement adjustment precision of the lens can be improved. In addition, the driving force can be controlled in a reasonable range through the force sensor 6, the actual movement displacement of the moving block 210 can be measured through the calibration member 17 and the range finder 7, and the ideal movement displacement can be compared to detect the displacement measurement precision.

[0056] Referring to Figure 4 In some embodiments, the test device 100 further comprises a coupling 8 and a first transmission shaft 5, the gear 9 is sleeved on the first transmission shaft 5, the hysteresis brake 11 comprises a second transmission shaft 111 coaxially arranged with the first transmission shaft 5, the coupling 8 connects the first transmission shaft 5 and the second transmission shaft 111, and the central axis direction of the first transmission shaft 5 is arranged perpendicularly to the movement direction of the rack 10.

[0057] Coaxial arrangement refers to the center axes of the two coincide, the gear 9 is sleeved on the first transmission shaft 5, and can rotate with the first transmission shaft 5. The hysteresis brake 11 includes a body and a second transmission shaft 111 connected with the body, and the first transmission shaft 5 and the second transmission shaft 111 are connected through the shaft coupling 8, which plays a role in connecting and transmitting torque. It is worth mentioning that the size of the shaft coupling 8 in the direction of the center axis of the first transmission shaft 5 and the second transmission shaft 111 is relatively large, that is, the shaft coupling 8 is sleeved on most of the length of the first transmission shaft 5, and also on most of the length of the second transmission shaft 111. The length refers to the distance in the direction of the center axis of the first transmission shaft 5, which can protect the first transmission shaft 5 and the second transmission shaft 111. In addition, the center axis of the first transmission shaft 5 is arranged perpendicularly to the moving direction of the rack 10, that is, the length direction of the rack 10, that is, the arrangement direction of the first bracket 41 and the second bracket 42. The relatively large gear 9 and the hysteresis brake 11 are not arranged in a straight line with the rack 10, which can reduce the length of the entire test device 100 and facilitate the reasonable arrangement of space.

[0058] Referring to Figure 5 In some embodiments, the positioning tool 3 is provided with a positioning groove for accommodating the workpiece 200 to be tested and a positioning column 31 for cooperating with the hole position of the workpiece 200 to be tested. The test device 100 further comprises a pressing tool 16, which comprises a pressing plate 161 and a pressing rod 162 arranged on the pressing plate 161. The pressing plate 161 is mounted on the workbench 2 to insert the pressing rod 162 on the positioning column 31. The workpiece 200 to be tested may, itself, have some hole positions or have its general or specific shape. When designing the tool, some positioning grooves and positioning columns 31 can be designed according to the shape and structural features of the workpiece 200 to be tested for positioning the workpiece 200 to be tested. The pressing tool 16 is movably mounted. When the workpiece 200 to be tested is placed in position on the positioning tool 3, the pressing tool 16 is pressed on the workpiece 200 to be tested to reduce the risk of movement of the workpiece 200 to be tested during testing. Specifically, the pressing tool 16 can include a pressing plate 161 and a pressing rod 162, the pressing rod 162 is inserted on the positioning column 31, and the pressing plate 161 can rotate or move up and down or left and right to insert the pressing rod 162 mounted thereon on the positioning column 31 to achieve positioning.

[0059] Referring to Figure 5 and Figure 6In some embodiments, the moving assembly further comprises a mounting base 12 and a threaded member 13, the mounting base 12 is provided with a first mounting hole and an elastic pin 14, the first support 41 is provided with a positioning hole and a second mounting hole, the elastic pin 14 passes through the positioning hole from the bottom of the first support 41 and extends out of the first support 41, and the threaded member 13 penetrates into the first mounting hole and the second mounting hole to connect the mounting base 12 and the first support 41. The mounting base 12 is a base connected with the first support 41 and can move together with the first support 41. Specifically, the mounting base 12 is arranged at the bottom of the first support 41, that is, below in the vertical direction, the top of the mounting base 12 is provided with the first mounting hole, the positioning pin is used to connect with the moving block 210 to realize the positioning and mounting of the moving block 210, and the positioning pin can be the elastic pin 14. The first support 41 is provided with the positioning hole and the second mounting hole, the elastic pin 14 passes through the positioning hole from the bottom of the first support 41 and extends out of the top of the first support 41 by a distance to be connected with the moving block 210. The threaded member 13 penetrates into the first positioning hole and the second positioning hole to mount the mounting base 12 on the first support 41, so as to realize the connection between the first support 41 and the mounting base 12.

[0060] Referring to Figure 5 and Figure 6 , the number of the elastic pins 14 is generally two, and the two elastic pins 14 are respectively connected with the two moving blocks 210 of the pupil distance adjustment module. Since there can be deviations in the mounting of the positioning tool 3, or deviations in the positioning positions on the positioning tool 3, or deviations in the mounting of the pupil distance adjustment module itself, the two moving blocks 210 can not be at the same height, that is, the heights of the bottoms of the two moving blocks 210 in the vertical direction are inconsistent, or the vertical heights of the two moving blocks 210 both have a certain degree of deviation, so the positioning pin is set as the elastic pin 14, and the elastic space 121 is arranged in the mounting base 12, and the elastic pin 14 can be extended and retracted in the elastic space 121 in the vertical direction, so as to offset the deviation of the vertical height of the moving block 210. Compared with the positioning pin arranged at a fixed position, the damage caused by the collision with the moving block 210 can be reduced, and the deviation of the height of the moving block 210 can also be accommodated. Specifically, referring to Figure 7 , the elastic pin 14 can include a spring 141 arranged in the elastic space 121 and a pin body 142 mounted at one end of the spring 141, and the end of the pin body 142 away from the spring 141 is connected with the moving block 210. It should be noted that the vertical direction in the present application is indicated by the arrow Y in Figure 2 , and the horizontal direction is indicated by the arrow X in Figure 2 .

[0061] In some embodiments, the first support 41 is provided with a plurality of positioning holes, and the elastic pin 14 can be installed in any positioning hole. The elastic pin 14 in the previous embodiment is provided to accommodate the height deviation of the two moving blocks 210 in the vertical direction. If the moving blocks 210 have deviation in the horizontal plane perpendicular to the vertical direction, or the positions of the moving blocks 210 of different models of the pupil distance adjustment module are slightly different in the horizontal direction, the elastic pin 14 can be moved to the positioning hole corresponding to the installation position of the moving block 210 to realize the connection of the elastic pin 14 and the moving block 210. The plurality of positioning holes in this embodiment are provided to overcome the position deviation of the moving blocks 210 in the horizontal plane.

[0062] With reference to Figure 8 In some embodiments, the second support 42 includes a bottom plate 421 and a vertical plate 422 provided on the bottom plate 421. The bottom plate 421 is in sliding connection with the workbench 2, and the rack 10 is installed on the bottom plate 421. One end of the force sensor 6 is connected to the vertical plate 422. The bottom plate 421 can be a horizontal plate, and the vertical plate 422 is provided above or on the top of the bottom plate 421. The vertical plate 422 can be provided in extension in the vertical direction. The bottom plate 421 is used to be in sliding connection with the workbench 2 and can slide along the workbench 2 under the drive of an external force. Since the second support 42 is provided as a whole below the first support 41, the vertical plate 422 is provided in extension in the vertical direction to facilitate the connection of the other end of the sensor in the horizontal direction.

[0063] With reference to Figure 8 And Figure 9 In some embodiments, the bottom plate 421 is further provided with a limiting plate 423 extending towards the first support 41. A gap 15 is provided between the limiting plate 423 and the bottom surface of the first support 41 facing the workbench 2. The limiting plate 423 is used to limit the distance of the downward movement of the first support 41 towards the limiting plate 423.

[0064] The limiting plate 423 is provided on the side of the bottom plate 421 facing the first support 41. The bottom plate 421 is below the first support 41. The limiting plate 423 extends towards the first support 41 and does not exceed the first support 41. Specifically, a gap 15 is provided between the top surface of the limiting plate 423 and the bottom surface of the first support 41. In this way, if the moving blocks 210 have vertical fluctuations during the detection process, the first support 41 will hit the limiting plate 423 when it shakes too much, and the limiting plate 423 can play a limiting role. The gap 15 provided between the first support 41 and the limiting plate 423 is to avoid friction between the first support 41 and the limiting plate 423 during normal use, increase the sliding resistance, and if an additional resistance is added, it will also affect the displacement measurement accuracy of the moving blocks 210.

[0065] With reference to Figure 9And Figure 10 In some embodiments, the first support 41 is provided with a first blocking piece, the vertical plate 422 is provided with a second blocking piece, one end of the force sensor 6 abuts against the first blocking piece, and the other end of the force sensor 6 abuts against the second blocking piece. The first blocking piece and the second blocking piece are respectively used to abut against both ends of the force sensor 6, and both abut in the same horizontal direction, facilitating detection of pressure and improving the accuracy of force detection.

[0066] With reference to Figure 9 And Figure 10 In some embodiments, the first blocking piece includes two first blocking blocks 411 arranged at intervals, and a first interval 412 is arranged between the two first blocking blocks 411, the second blocking piece includes two second blocking blocks 4221 arranged at intervals, and a second interval 4222 is arranged between the two second blocking blocks 4221, the testing device 100 further includes a first fastener 18 and a second fastener 19, the first fastener 18 is installed at one end through the first interval 412, and the second fastener 19 is installed at the other end through the second interval 4222. Both of the two first blocking blocks 411 abut against one end of the sensor, and both of the two second blocking blocks 4221 abut against the other end of the sensor, the first fastener 18 fixes one end of the force sensor 6 on the first support 41 through the first interval 412, and the second fastener 19 fixes the other end of the force sensor 6 on the vertical plate 422 through the second interval 4222, achieving fixed installation of the force sensor 6.

[0067] In some embodiments, the sliding direction of the moving block 210, the sliding direction of the second support 42, and the moving direction of the rack 10 are all the same. The same sliding direction or moving direction can reduce the loss of non-horizontal direction components, improve the accuracy of sliding, and further improve the accuracy of detection.

[0068] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A test device, characterized by The test device comprises a workbench, a positioning tool mounted on the workbench and used for placing a pupil distance adjustment module, a moving assembly comprising a sliding frame, a calibration piece and a force sensor, the sliding frame comprising a first support connected with a moving block of the pupil distance adjustment module and a second support slidingly mounted on the workbench, the calibration piece being mounted on the first support or the second support and capable of sliding together with the first support or the second support, and the force sensor being connected at one end with the first support and at the other end with the second support. The moving assembly further comprises a mounting seat provided with a first mounting hole and an elastic pin and a threaded member, the first support is provided with a positioning hole and a second mounting hole, the elastic pin is arranged to extend out of the first support from the bottom of the first support through the positioning hole, and the threaded member is arranged to pass through the first mounting hole and the second mounting hole to connect the mounting seat and the first support, the number of the elastic pins is two, and the two elastic pins are respectively connected with two moving blocks of the pupil distance adjustment module. The test device further comprises a distance meter used for measuring the sliding distance of the calibration piece, a transmission assembly comprising a gear and a rack in mesh with each other, the rack being mounted on the second support, and a hysteresis brake in transmission connection with the gear and used to provide resistance to prevent the gear from rotating. The test device further comprises a shaft coupling and a first transmission shaft, the gear is sleeved on the first transmission shaft, the hysteresis brake comprises a second transmission shaft coaxially arranged with the first transmission shaft, the shaft coupling connects the first transmission shaft and the second transmission shaft, and the central axis direction of the first transmission shaft is arranged perpendicularly to the moving direction of the rack. The first support is provided with a plurality of positioning holes, and the elastic pin can be arranged in any one of the positioning holes. The second support comprises a bottom plate and a vertical plate arranged on the bottom plate, the bottom plate is slidingly connected with the workbench, the rack is mounted on the bottom plate, and the force sensor is connected at one end with the vertical plate. The first support is provided with a first blocking piece, the vertical plate is provided with a second blocking piece, one end of the force sensor is in abutment with the first blocking piece, and the other end of the force sensor is in abutment with the second blocking piece. The first blocking piece comprises two first blocking blocks arranged at intervals, a first interval is arranged between the two first blocking blocks, the second blocking piece comprises two second blocking blocks arranged at intervals, a second interval is arranged between the two second blocking blocks, the test device further comprises a first fastener and a second fastener, the first fastener is arranged to pass through the first interval and is mounted at one end of the force sensor, and the second fastener is arranged to pass through the second interval and is mounted at the other end of the force sensor.

2. The test device of claim 1, wherein, The bottom plate is further provided with a limiting plate extending towards the first support, a gap is arranged between the limiting plate and the bottom surface of the first support facing the workbench, and the limiting plate is used to limit the distance of the first support moving downwards towards the limiting plate.

3. The test device of claim 1, wherein, ​ 4. The test device of claim 1, wherein, ​ 5. The test device of claim 4, wherein, ​ 6. The test device of claim 5, wherein, ​ 7. The test device of claim 4, wherein, ​ And / or, the sliding direction of the moving block, the sliding direction of the second support and the moving direction of the rack are all the same.

8. The test device of any one of claims 1 to 4, wherein, The positioning tool is provided with a positioning groove for accommodating the pupil distance adjustment module and a positioning column for cooperating with a hole position of the pupil distance adjustment module, and the testing device further comprises a pressing tool including a pressing plate and a pressing rod arranged on the pressing plate, the pressing plate being installed on the workbench to insert the pressing rod on the positioning column.

9. The test device of any one of claims 1 to 4, wherein, The number of the moving assemblies, the transmission assemblies and the magnetic hysteresis brakes is two, and each of the moving assemblies is connected with one of the moving blocks.

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