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, screw rod and hysteresis brake, positioning tool is installed to workbench, moving assembly includes sliding frame, calibration piece, nut 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, nut is connected with second support, calibration piece is installed to first support or second support and can slide together;Range finder is used to measure the sliding distance of calibration piece;Screw rod is rotatably installed at one end of the workbench, nut is threadedly connected with screw rod;Hysteresis brake is connected with the other end of screw rod, and hysteresis brake is used to provide resistance to prevent screw rod from rotating.The application can improve the displacement adjustment accuracy of intelligent wearable device lens.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a testing device. Background Technology

[0002] In the adjustment process of smart wearable devices, such as VR (Virtual Reality), the interpupillary distance is adjusted by moving a moving block along a sliding axis driven by a motor. However, in related technologies, there is a large gap between the actual adjustment distance and the ideal adjustment distance of the lenses of smart wearable devices, resulting in low adjustment accuracy. Summary of the Invention

[0003] The main objective of this invention is to provide a testing device that addresses the technical problem of low lens adjustment accuracy in smart wearable devices in related technologies.

[0004] To achieve the above objectives, according to some embodiments of the present invention, the present invention provides a testing apparatus, comprising:

[0005] Workbench;

[0006] A positioning fixture is installed on the worktable and is used to place the workpiece to be measured.

[0007] A movable component includes a sliding frame, a calibration component, a nut, and a force sensor. The sliding frame includes a first support and a second support. The first support is connected to the moving block of the workpiece to be tested. The second support is slidably mounted on the worktable. The nut is connected to the second support. The calibration component is mounted on the first support or the second support and can slide together with it. One end of the force sensor is connected to the first support, and the other end is connected to the second support.

[0008] A rangefinder, used to measure the sliding distance of the calibration component;

[0009] A lead screw, one end of which is rotatably mounted on the worktable, and a nut threadedly connected to the lead screw to drive the lead screw to rotate;

[0010] A hysteresis brake is connected to the other end of the lead screw, and the hysteresis brake is used to provide resistance to prevent the lead screw from rotating.

[0011] In some embodiments, the second bracket is integrally formed with the nut; or, the second bracket and the nut are separate components.

[0012] In some embodiments, the movable component further includes a mounting base and a threaded member. The mounting base is provided with a first mounting hole and a resilient pin. The first bracket is provided with a positioning hole and a second mounting hole. The resilient pin passes through the positioning hole from the bottom of the first bracket and extends out of the first bracket. The threaded member passes through the first mounting hole and the second mounting hole to connect the mounting base and the first bracket.

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

[0014] In some embodiments, the second support includes a first sub-frame and a second sub-frame. The first sub-frame includes a base plate and a vertical plate disposed on the base plate, and the base plate is slidably connected to the workbench. The second sub-frame includes a connecting plate and two side plates disposed at both ends of the connecting plate. The two side plates are respectively connected to the end of the vertical plate away from the base plate, and the side of the connecting plate away from the side plates is connected to the nut.

[0015] In some embodiments, the second subframe is arranged parallel to the base plate at a distance, and the second subframe is located on the side of the base plate away from the workbench. The sliding direction of the moving block, the sliding direction of the sliding frame, and the moving direction of the nut are all the same.

[0016] In some embodiments, the vertical plate cooperates with the second sub-frame to form a through hole, the workbench includes a table surface and a fixed plate, the fixed plate passes through the through hole from the table surface, the fixed plate is provided with a shaft hole, and one end of the lead screw is installed in the shaft hole.

[0017] In some embodiments, the force sensor is connected to the first bracket and the vertical plate respectively, and the force sensor is used to detect the thrust of the moving block.

[0018] In some embodiments, the base plate is further provided with a limiting plate extending toward the first bracket, and a gap is provided between the limiting plate and the bottom surface of the first bracket facing the worktable, and the limiting plate is used to limit the distance by which the first bracket moves downward toward the limiting plate.

[0019] In some embodiments, the positioning fixture is provided with a positioning groove and a positioning post. The positioning groove is used to accommodate the workpiece to be tested, and the positioning post is used to cooperate with the hole of the workpiece to be tested. The testing device further includes a clamping fixture, which includes a pressure plate and a pressure rod disposed on the pressure plate. The pressure plate is mounted on the worktable to insert the pressure rod into the positioning post.

[0020] In some embodiments, the number of the moving component, the lead screw, and the hysteresis brake are all two sets, and they are connected in a one-to-one correspondence. The workpiece to be tested includes two moving blocks, and one moving component is connected to one moving block.

[0021] In the above scheme, the testing device includes a worktable, a positioning fixture, a moving component, a rangefinder, a lead screw, and a hysteresis brake. The positioning fixture is mounted on the worktable and is used to place the workpiece to be tested. The moving component includes a sliding frame, a calibration component, a nut, and a force sensor. The sliding frame includes a first support and a second support. The first support is connected to the moving block of the workpiece to be tested, and the second support is slidably mounted on the worktable. The nut is connected to the second support. The calibration component is mounted on the first or second support and can slide along with it. One end of the force sensor is connected to the first support, and the other end is connected to the second support. The rangefinder is used to measure the sliding distance of the calibration component. One end of the lead screw is rotatably mounted on the worktable, and the nut is threadedly connected to the lead screw to drive the lead screw to rotate. The hysteresis brake is connected to the other end of the lead screw and is used to provide resistance to prevent the lead screw from rotating. This invention, by setting a hysteresis brake, can provide a constant load force by adjusting the current, simulating the resistance encountered by the moving block of the interpupillary distance adjustment module during movement, thereby improving the displacement adjustment accuracy of the lens of the smart wearable device. The driving force can be controlled within a reasonable range by force sensors. The actual displacement of the moving block can be measured by calibration components and a rangefinder, and compared with the ideal displacement to test the accuracy of displacement measurement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the testing device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the test device from one perspective according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the nut and lead screw of the testing device according to an embodiment of the present invention;

[0026] Figure 4 This is a partial structural schematic diagram of the testing device according to an embodiment of the present invention;

[0027] Figure 5This is another structural schematic diagram of the testing device according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the positioning pin and mounting base of the testing device according to an embodiment of the present invention;

[0029] Figure 7 This is another structural schematic diagram of the testing device according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the first subframe, lead screw, and nut of the testing device according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the first subframe and nut of the testing device in an embodiment of the present invention.

[0032] Explanation of icon numbers:

[0033] 100. Testing device; 200. Workpiece to be tested; 210. Moving block;

[0034] 2. Workbench; 21. Fixed plate; 3. Positioning fixture; 31. Positioning column; 4. Sliding frame; 41. First support; 42. Second support; 421. First sub-frame; 4211. Base plate; 4212. Vertical plate; 4213. Limiting plate; 422. Second sub-frame; 4221. Connecting plate; 42211. Mounting groove; 42212. Second connecting hole; 4222. Side plate; 423. Through hole; 5. Nut; 51. Threaded part; 52. Mounting part; 521. First connecting hole; 6. Force sensor; 7. Rangefinder; 8. Lead screw; 11. Hysteresis brake; 12. Mounting base; 121. Elastic space; 13. Threaded part; 14. Elastic pin; 141. Spring; 142. Pin body; 15. Clearance; 16. Clamping fixture; 161. Pressure plate; 162. Pressure rod; 17. Calibration part.

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] In the adjustment process of smart wearable devices, such as VR (Virtual Reality), AR (Augmented Reality), and MR (Mixed Reality), the interpupillary distance is adjusted by moving a moving block along a sliding axis driven by a motor. However, there is a large gap between the actual adjustment distance of the lens and the ideal adjustment distance in related technologies, resulting in low adjustment accuracy.

[0040] After careful research, the applicant discovered that, taking VR as an example, during the movement of the moving block driven by the motor, the moving block encounters resistance such as friction. Due to this resistance, the actual displacement of the moving block differs from the ideal displacement after the motor outputs driving force, reducing the adjustment accuracy. Those skilled in the art have made efforts to reduce this resistance, but because the generation of system resistance is complex and friction itself is difficult to eliminate, the results have been minimal.

[0041] The applicant considered whether, since system resistance is unavoidable, its existence could be accepted, and a testing device could be designed to test the accuracy of lens displacement adjustment under the presence of resistance.

[0042] Therefore, the applicant proposes a testing device.

[0043] Please see Figure 1 and Figure 2According to some embodiments of the present invention, a testing device 100 is provided, including a worktable 2, a positioning fixture 3, a moving assembly, a rangefinder 7, a lead screw, and a hysteresis brake 11. The positioning fixture 3 is mounted on the worktable 2 and is used to place the workpiece 200 to be tested. The moving assembly includes a sliding frame 4, a calibration component 17, a nut 5, and a force sensor 6. The sliding frame 4 includes a first support 41 and a second support 42. The first support 41 is connected to the moving block 210 of the workpiece 200, and the second support 42 is slidably mounted on the worktable 2. On the worktable 2, nut 5 is connected to the second bracket 42, and calibration component 17 is installed on the first bracket 41 or the second bracket 42 and can slide together with it; one end of force sensor 6 is connected to the first bracket 41 and the other end is connected to the second bracket 42; rangefinder 7 is used to measure the sliding distance of calibration component 17; one end of lead screw 8 is rotatably installed on the worktable 2, and nut 5 is threadedly connected to lead screw 8 to drive lead screw 8 to rotate; hysteresis brake 11 is connected to the other end of lead screw 8, and hysteresis brake 11 is used to provide resistance to prevent lead screw 8 from rotating.

[0044] Reference Figure 1 and Figure 2 Workbench 2 refers to the base on which various components are placed. Workbench 2 can be placed on a workbench. Positioning fixture 3 is used to position the workpiece 200 to be tested. If the workpiece 200 to be tested is an interpupillary distance adjustment module, the interpupillary distance adjustment module is part of a smart wearable device and is used to adjust the position of the lenses. The interpupillary distance adjustment module includes a drive motor and a moving block 210 connected to the drive motor. The moving block 210 is connected to the lens frame, and the lens is set inside the lens frame. Generally, there are two drive motors and two moving blocks 210, which are connected one-to-one. The moving blocks 210 can move along the axis. The two moving blocks 210 are connected to two lens frames respectively to adjust the distance between the two lenses, which can also be described as adjusting the interpupillary distance.

[0045] The sliding frame 4 includes a first support 41 and a second support 42 connected to each other. The first support 41 is connected to the moving block 210 and can move under the drive of the moving block 210. The second support 42 is slidably mounted on the worktable 2. The two ends of the force sensor 6 are connected to the first support 41 and the second support 42 respectively. The force sensor 6 can measure the magnitude of the driving force of the drive motor on the moving block 210 to detect the magnitude of the driving force of the motor. The testing device 100 can determine whether the driving force is within the preset range based on the driving force value.

[0046] The rangefinder 7 can be fixedly mounted on the workbench 2. Specifically, the rangefinder 7 can be a laser displacement device, which offers higher measurement accuracy. The calibration component 17 refers to the part used for measurement by the rangefinder 7. Specifically, the calibration component 17 can be a vertical rod or a vertical plate. Generally, the laser emitted by the laser rangefinder 7 is horizontal, while the calibration component 17 is vertically positioned. The calibration component 17 can move together with the sliding frame 4. It can be mounted on the first support 41 or the second support 42. Because the first support 41 and the second support 42 move synchronously during the actual movement of the sliding frame 4, and because the sliding block is connected to and drives the first support 41, the actual displacement of the calibration component 17 is the displacement of the moving block 210. Thus, by measuring the displacement of the calibration component 17, the actual displacement of the moving block 210 can be measured.

[0047] Reference Figure 1 or Figure 2 In some embodiments, the number of moving components, lead screws, and hysteresis brakes 11 are all two sets, connected in a one-to-one correspondence. The workpiece 200 to be measured includes two moving blocks 210, and one moving component is connected to one moving block 210. Since there are two moving blocks 210, there are also two corresponding moving components, lead screws, and hysteresis brakes 11, which are used to provide a constant load force for the two moving blocks 210 and to measure the actual displacement of the moving blocks 210, thereby detecting and adjusting the measurement accuracy.

[0048] Reference Figure 3 One end of the lead screw 8 is rotatably mounted on the workbench 2. The nut 5 has an internal thread in its hole and the lead screw 8 has an external thread that connects with the internal thread. The second bracket 42 can drive the nut 5 to move along the central axis of the lead screw 8, thereby driving the lead screw 8 connected to the nut 5 to rotate. The threaded connection design of the lead screw 8 and the nut 5 can realize the conversion between linear torque and rotational torque.

[0049] The hysteresis brake 11 is connected to the other end of the lead screw 8. The hysteresis brake 11 provides resistance to prevent the lead screw 8 from rotating. The hysteresis brake 11 can provide a constant resistance, which is used to simulate the resistance encountered by the moving block 210 of the interpupillary distance adjustment module during movement. In this way, by simulating the resistance encountered by the moving block 210 through the hysteresis brake 11, the displacement of the moving block 210 during actual use can be measured, thus obtaining the displacement of the lens. Moreover, 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 improving the adjustment accuracy.

[0050] The principle of the hysteresis brake 11 and the lead screw is explained as follows:

[0051] For the hysteresis brake 11, the relationship between force and load torque is as follows:

[0052] T = n * I (Formula 1);

[0053] Where I refers to the driving current supplied to the hysteresis brake 11, n is the conversion coefficient, and T is the torque. It can be seen that the load torque of the hysteresis brake 11 is proportional to the driving current. The hysteresis brake 11 can achieve contactless torque transmission and realize smooth, steplessly adjustable, and speed-independent stable load torque control.

[0054] For lead screw 8 and nut 5, the relationship between force and torque is as follows:

[0055] F = T * 2π / S / η (Formula 2);

[0056] Where F is the driving force, η is the screw efficiency, S is the screw lead, and T is the torque. When the nut 5 moves linearly to the left or right, the screw 8 will be driven to rotate clockwise or counterclockwise, thus realizing the conversion between linear motion and rotational motion, and converting the load torque into a linear load force. Combining formulas 1 and 2, we can obtain:

[0057] F = K * I; where K = n * 2π / S / η

[0058] As can be seen from the above formula, the driving current of the hysteresis brake 11 can be controlled by software to achieve adjustable load torque, that is, adjustable load force.

[0059] In the above embodiments of this application, by setting a hysteresis brake 11, a constant and adjustable load force can be provided by adjusting the drive current to simulate the resistance encountered by the moving block 210 of the interpupillary distance adjustment module during movement. This allows for the detection and adjustment of the displacement of the moving block 210, thereby improving the displacement adjustment accuracy of the lens in the smart wearable device. Furthermore, the driving force can be controlled within a reasonable range by the force sensor 6. The actual displacement of the moving block 210 can be measured by the calibration component 17 and the rangefinder 7, and compared with the ideal displacement to detect the accuracy of the displacement measurement.

[0060] Reference Figure 4In some embodiments, the positioning fixture 3 is provided with a positioning groove and a positioning post 31. The positioning groove is used to accommodate the workpiece 200 to be tested, and the positioning post 31 is used to cooperate with the holes of the workpiece 200 to be tested. The testing device 100 also includes a clamping fixture 16, which includes a pressure plate 161 and a pressure rod 162 disposed on the pressure plate 161. The pressure plate 161 is mounted on the worktable 2 to insert the pressure rod 162 into the positioning post 31. The workpiece 200 to be tested may have some holes or have a general or specific shape. When designing the fixture, some positioning grooves and positioning posts 31 can be designed according to the shape and structural characteristics of the workpiece 200 to be tested for positioning. The clamping fixture 16 is movably installed. After the workpiece 200 to be tested is placed on the positioning fixture 3 and positioned, the clamping fixture 16 is pressed on the workpiece 200 to reduce the risk of the workpiece 200 to be tested moving during the testing process. Specifically, the clamping fixture 16 may include a pressure plate 161 and a pressure rod 162. The pressure rod 162 is inserted into the positioning post 31. The pressure plate 161 can rotate, move up and down, or move left and right to insert the pressure rod 162 installed on it into the positioning post 31 to achieve positioning.

[0061] Reference Figure 4 and Figure 5 In some embodiments, the movable component further includes a mounting base 12 and a threaded member 13. The mounting base 12 is provided with a first mounting hole and a resilient pin 14. The first bracket 41 is provided with a positioning hole and a second mounting hole. The resilient pin 14 passes through the positioning hole from the bottom of the first bracket 41 and extends out of the first bracket 41. The threaded member 13 passes through the first mounting hole and the second mounting hole to connect the mounting base 12 and the first bracket 41.

[0062] Mounting base 12 is a base connected to the first bracket 41 and capable of moving together with the first bracket 41. Specifically, mounting base 12 is located at the bottom of the first bracket 41, that is, vertically below it. A first mounting hole is provided at the top of mounting base 12, and a positioning pin is used to connect with the movable block 210 to achieve positioning and installation of the movable block 210. The positioning pin can be an elastic pin 14. A positioning hole and a second mounting hole are provided on the first bracket 41. The elastic pin 14 passes through the positioning hole from the bottom of the first bracket 41 and extends a certain distance from the top of the first bracket 41 for connection with the movable block 210. A threaded component 13 passes through the first and second positioning holes to mount mounting base 12 onto the first bracket 41, thus connecting the first bracket 41 and mounting base 12.

[0063] Reference Figure 4 and Figure 5Here, there are generally two elastic pins 14, which are connected to the two moving blocks 210 of the interpupillary distance adjustment module, respectively. Because the installation of the positioning fixture 3 may be misaligned, or the positioning position on the positioning fixture 3 may be misaligned, or the installation of the interpupillary distance adjustment module itself may be misaligned, the two moving blocks 210 may not be at the same height. That is, the bottom of the two moving blocks 210 may not be at the same vertical height, or there may be a certain degree of deviation in the vertical height of the two moving blocks 210. Therefore, elastic pins 14 are used as positioning pins, and an elastic space 121 is provided within the installation. The elastic pins 14 can extend and retract within the elastic space 121 in the vertical direction, thereby compensating for the deviation in the vertical height of the moving blocks 210. Compared with positioning pins with fixed positions, this reduces damage caused by collisions with the moving blocks 210 and can also accommodate deviations in the height direction of the moving blocks 210. Specifically, refer to... Figure 6 The elastic pin 14 may include a spring 141 disposed within the elastic space 121 and a pin body 142 mounted on one end of the spring 141. The end of the pin body 142 away from the spring 141 is connected to the moving block 210. It should be noted that the vertical direction in this application is as follows... Figure 2 As indicated by the middle arrow Y, the horizontal direction is as follows: Figure 2 As indicated by the middle arrow X.

[0064] In some embodiments, the first bracket 41 is provided with multiple positioning holes, and the elastic pin 14 can be installed in any of the positioning holes. The previous embodiment provided the elastic pin 14 to accommodate the height difference between the two moving blocks 210 in the vertical direction. This embodiment provides multiple positioning holes on the first bracket 41. If the moving blocks 210 have a deviation in the horizontal plane perpendicular to the vertical direction, or if the positions of the moving blocks 210 of different models of interpupillary distance adjustment modules differ slightly 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, thus connecting the elastic pin 14 to the moving block 210. This embodiment provides multiple positioning holes to overcome the positional deviation of the moving blocks 210 in the horizontal plane.

[0065] Reference Figure 4 and Figure 7In some embodiments, the second bracket 42 and the nut 5 are integrally formed; or, the second bracket 42 and the nut 5 are separate components. The term "integrated" here can refer to a single molding process, or it can be a process where the nut 5 and the second bracket 42 are manufactured as a single unit. This could be achieved through welding or screw connection, with the lead screw 8 then connected via threads. Using an integrated design simplifies the installation process. Alternatively, the second bracket 42 and the nut 5 can be separate components, which increases installation flexibility. The nut 5 can be installed onto the lead screw 8 before installing the second bracket 42, or the nut 5 can be installed onto the second bracket 42 first, and then connected to the lead screw 8. Those skilled in the art can configure the design according to their specific needs.

[0066] Reference Figure 7 In some embodiments, the second support 42 includes a first sub-frame 421 and a second sub-frame 422. The first sub-frame 421 includes a base plate 4211 and a vertical plate 4212 disposed on the base plate 4211. The base plate 4211 is slidably connected to the workbench 2, and the vertical plate 4212 is connected to the first support 41. The second sub-frame 422 includes a connecting plate 4221 and two side plates 4222 disposed at both ends of the connecting plate 4221. The two side plates 4222 are respectively connected to the end of the vertical plate 4212 away from the base plate 4211, and the side of the connecting plate 4221 away from the side plates 4222 is connected to a nut 5.

[0067] The first sub-frame 421 is positioned below the second sub-frame 422. The base plate 4211 can be a horizontal plate, and the vertical plate 4212 is positioned above or at the top of the base plate 4211. The vertical plate 4212 can extend vertically. The base plate 4211 is slidably connected to the worktable 2 and can slide along the worktable 2 under external force. The second sub-frame 422 includes a connecting plate 4221 and two side plates 4222 arranged parallel to each other on the same side of the connecting plate 4221. The two side plates 4222 are respectively connected to the end of the vertical plate 4212 facing away from the base plate 4211. Thus, the first sub-frame 421 and the second sub-frame 422 are connected together and can move together. The side of the connecting plate 4221 facing away from the side plates 4222 is connected to a nut 5, thereby allowing the nut 5 to move in the same direction via the movement of the second support 42.

[0068] Reference Figure 8 and Figure 9In some embodiments, the connecting plate 4221 is provided with a mounting groove 42211, the nut 5 includes a threaded part 51 and a mounting part 52 installed on the outer periphery of the threaded part 51, the threaded part 51 is installed in the mounting groove 42211, and the threaded part 51 is provided with an internal thread that is threaded to the lead screw 8, the mounting part 52 is provided with a first connecting hole 521, and the connecting plate 4221 is also provided with a second connecting hole 42212. The mounting part 52 and the connecting plate 4221 are threadedly connected by setting a screw to pass through the first connecting hole 521 and the second connecting hole 42212.

[0069] Reference Figure 7 In some embodiments, the second subframe 422 is arranged parallel to the base plate 4211 at intervals, and the second subframe 422 is located on the side of the base plate 4211 away from the worktable 2. The sliding direction of the moving block 210, the sliding direction of the sliding frame 4, and the moving direction of the nut 5 are all the same. The connecting plate 4221 is vertically arranged, the two side plates 4222 extend horizontally, and the base plate 4211 is horizontally arranged. The sliding directions of the first subframe 421, the second subframe 422, and the moving block 210 are all horizontal, and the nut 5 also moves horizontally along the horizontally arranged lead screw 8. In this way, the moving direction of each component is not changed during the force transmission process, reducing the risk of inaccurate measurement due to torque components.

[0070] Reference Figure 7 In some embodiments, the vertical plate 4212 and the second sub-frame 422 cooperate to form a through hole 423. The worktable 2 includes a table surface and a fixed plate 21. The fixed plate 21 passes through the through hole 423 from the table surface. The fixed plate 21 is provided with a shaft hole, and one end of the lead screw 8 is installed in the shaft hole. The fixed plate 21 is fixedly set on the table surface and remains stationary during use. There can be two fixed plates 21, which are arranged opposite each other and respectively set at both ends of the lead screw 8. The two fixed plates 21 are provided with coaxial shaft holes for installing the lead screw 8 and ensuring that the lead screw 8 is set horizontally. The main purpose of setting the fixed plate 21 is also for installing the lead screw 8, and the lead screw 8 can rotate in the shaft hole.

[0071] Reference Figure 7 In some embodiments, the force sensor 6 is connected to the first bracket 41 and the vertical plate 4212 respectively, and the force sensor 6 is used to detect the thrust of the moving block 210. Specifically, the drive motor drives the moving block 210 to move, and the movement of the moving block 210 causes the first bracket 41 connected to the moving block 210 to move. The two ends of the force sensor 6 are connected to the first bracket 41 and the second bracket 42 respectively. Through the connection of the force sensor 6, the first bracket 41 drives the second bracket 42 to move together. At the same time, the force sensor 6 can measure the force between the first bracket 41 and the second bracket 42, thereby obtaining the thrust of the moving block 210, and thus determining whether the thrust is within a preset range.

[0072] Reference Figure 7 In some embodiments, a limiting plate 4213 extending toward the first support 41 is also provided on the base plate 4211. A gap 15 is provided between the limiting plate 4213 and the bottom surface of the first support 41 facing the worktable 2. The limiting plate 4213 is used to limit the distance that the first support 41 moves downward toward the limiting plate 4213.

[0073] A limiting plate 4213 is disposed on the side of the base plate 4211 facing the first support 41. The base plate 4211 is located below the first support 41, and the limiting plate 4213 extends toward the first support 41 but does not exceed it. Specifically, a gap 15 is provided between the top surface of the limiting plate 4213 and the bottom surface of the first support 41. With this configuration, if the moving block 210 fluctuates vertically during the detection process, the first support 41 will hit the limiting plate 4213 if the vibration is too large, and the limiting plate 4213 can play a limiting role. The gap 15 between the first support 41 and the limiting plate 4213 is to avoid friction between the first support 41 and the limiting plate 4213 during normal use, which would increase the sliding resistance. Moreover, if an additional resistance is added, it will also affect the displacement measurement accuracy of the moving block 210.

[0074] The above are merely exemplary embodiments of the present invention and do not limit the scope of the patent of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A testing device, characterized in that, include: Workbench; A positioning fixture is installed on the worktable and is used to place the interpupillary distance adjustment module. A movable component includes a sliding frame, a calibration component, a nut, and a force sensor. The sliding frame includes a first bracket and a second bracket. The first bracket is connected to the movable block of the interpupillary distance adjustment module. The second bracket is slidably mounted on the worktable. The nut is connected to the second bracket. The calibration component is mounted on the first bracket or the second bracket and can slide together with it. One end of the force sensor is connected to the first bracket, and the other end is connected to the second bracket. The movable component further includes a mounting base and a threaded component. The mounting base is provided with a first mounting hole and a resilient pin. The first bracket is provided with a positioning hole and a second mounting hole. The resilient pin passes through the positioning hole from the bottom of the first bracket and extends out of the first bracket. The threaded component passes through the first mounting hole and the second mounting hole to connect the mounting base and the first bracket. There are two resilient pins, and the two resilient pins are respectively connected to the two movable blocks of the interpupillary distance adjustment module. A rangefinder, used to measure the sliding distance of the calibration component; A lead screw, one end of which is rotatably mounted on the worktable, and a nut threadedly connected to the lead screw to drive the lead screw to rotate; A hysteresis brake is connected to the other end of the lead screw, and the hysteresis brake is used to provide resistance to prevent the lead screw from rotating.

2. The testing apparatus as described in claim 1, characterized in that, The second bracket is integrally formed with the nut; or, the second bracket and the nut are separate components.

3. The testing apparatus as described in claim 1, characterized in that, The first bracket is provided with multiple positioning holes, and the elastic pin can be installed in any of the positioning holes.

4. The testing apparatus as described in claim 1, characterized in that, The second support includes a first sub-frame and a second sub-frame. The first sub-frame includes a base plate and a vertical plate disposed on the base plate. The base plate is slidably connected to the workbench. The second sub-frame includes a connecting plate and two side plates disposed at both ends of the connecting plate. The two side plates are respectively connected to the end of the vertical plate away from the base plate. The side of the connecting plate away from the side plates is connected to the nut.

5. The testing apparatus as described in claim 4, characterized in that, The second sub-frame is arranged parallel to the base plate at a distance, and the second sub-frame is located on the side of the base plate away from the workbench. The sliding direction of the moving block, the sliding direction of the sliding frame, and the moving direction of the nut are all the same. And / or, the vertical plate cooperates with the second sub-frame to form a through hole, the worktable includes a table surface and a fixed plate, the fixed plate passes through the through hole from the table surface, the fixed plate is provided with a shaft hole, and one end of the lead screw is installed in the shaft hole.

6. The testing apparatus as described in claim 4, characterized in that, The force sensor is connected to the first bracket and the vertical plate respectively, and the force sensor is used to detect the thrust of the moving block.

7. The testing apparatus as described in claim 4, characterized in that, The base plate is also provided with a limiting plate extending toward the first bracket. A gap is provided between the limiting plate and the bottom surface of the first bracket facing the workbench. The limiting plate is used to limit the distance that the first bracket moves downward toward the limiting plate.

8. The testing apparatus as described in any one of claims 1 to 4, characterized in that, The positioning fixture is provided with a positioning groove and a positioning post. The positioning groove is used to accommodate the interpupillary distance adjustment module, and the positioning post is used to cooperate with the hole of the interpupillary distance adjustment module. The testing device also includes a clamping fixture, which includes a pressure plate and a pressure rod disposed on the pressure plate. The pressure plate is installed on the worktable to insert the pressure rod into the positioning post.

9. The testing apparatus as described in any one of claims 1 to 4, characterized in that, The number of each of the moving component, the lead screw, and the hysteresis brake is two sets, and they are connected in a one-to-one correspondence. Each moving component is connected to one moving block.

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