OIS reed elastic performance testing device

Abstract

The utility model discloses an OIS reed elastic performance testing device, which comprises an OIS reed mounting seat, a pressure sensor, a displacement sensor, a pressing needle and a pressing needle driving mechanism, and the OIS reed body is fixed on the OIS reed mounting seat through a boss arranged on the side wall of the boss cover plate. According to the OIS reed elastic performance testing device, clamping is carried out through the boss arranged on the side wall of the boss cover plate, an OIS reed body is prevented from moving in the measuring process, the driving mechanism drives the pressing needle to downwards press the testing section of the OIS reed, the displacement of the testing section is measured through the displacement sensor, the pressure of the pressing needle is obtained through the pressure sensor, and the OIS reed elastic performance is tested. Compared with a manual measurement machine, the mechanical measurement machine can calculate numerical values more accurately, and measurement errors can be better avoided.

Description

Technical Field

[0001] The utility model relates to the field of miniature voice coil motor production jigs, in particular to an OIS reed elastic performance testing device. Background Art

[0002] Currently, commonly used OIS drive devices include voice coil motor (VCM), shape memory alloys (SMA), piezoelectric, stepper motor, etc. Among them, the SMA OIS device uses SMA technology to drive the lens to achieve optical image stabilization, which has many advantages such as small drive volume, high efficiency, high speed, low power consumption, and low noise.

[0003] The existing SMA type OIS device includes an SMA wire, an OIS spring, an OIS substrate, an OIS support and an OIS base. The OIS substrate is arranged on the OIS base, the OIS support is arranged on the OIS substrate, the OIS spring is arranged on the OIS support, the SMA wire is connected to the OIS spring, and the SMA wire can pull the OIS spring to move in a predetermined direction, and the optical image stabilization function of the lens is realized by adjusting the OIS spring. Therefore, the elastic performance of the OIS spring is crucial to the driving performance and accuracy of the SMA type OIS device. Utility Model Content

[0004] The purpose of the utility model is to provide an OIS reed elastic performance testing device which has a novel and unique structure, is easy to use, and can quickly measure the preload and K value range of the OIS reed; the specific technical scheme is:

[0005] An OIS spring elastic performance testing device comprises an OIS spring mounting seat, a cover plate, a pressure sensor, a displacement sensor, a pressure needle and a pressure needle driving mechanism; the OIS spring body is fixed on the OIS spring mounting seat through a cover plate boss arranged on a side wall of the cover plate.

[0006] Furthermore, the pressure sensor is an S-type pressure sensor.

[0007] Furthermore, the displacement sensor is composed of a laser rangefinder and a reflective plate.

[0008] Furthermore, the pressing needle driving mechanism is driven by a stepping motor.

[0009] Furthermore, the needle pressing drive mechanism adopts a gear and rack mechanism.

[0010] Furthermore, it also includes a top cover, and the top cover and the OIS spring mounting seat are provided with a cantilever clamping structure that cooperates with each other to clamp the cantilever end of the OIS spring.

[0011] Furthermore, the cantilever clamping structure is a boss arranged on the lower end surface of the top cover and a groove arranged on the top end surface of the OIS spring mounting seat; the boss and the groove cooperate to clamp the OIS spring.

[0012] Furthermore, it also includes a spring avoidance groove for adjusting the height position of the pressing needle.

[0013] The utility model discloses an OIS spring elastic performance testing device which is clamped by a boss arranged on the side wall of the boss cover plate to prevent the OIS spring body from moving during the measurement process. The driving mechanism drives the pressure needle to press down the test section of the OIS spring and measures the displacement of the test section through the displacement sensor, and obtains the pressure of the pressure needle through the pressure sensor. Compared with the manual measurement machine, the mechanical type can calculate the value more accurately, and the measurement error can be better avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the OIS reed and the OIS reed mounting seat;

[0015] Figure 2 This is a schematic diagram of the structure of the OIS reed elastic performance testing device of the utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of structural decomposition;

[0017] Figure 4 It is a schematic diagram of the top cover structure;

[0018] Figure 5 It is a schematic diagram of the OIS reed structure;

[0019] Figure 6 It is a schematic diagram of the structure of the pressing needle sliding seat;

[0020] Figure 7 Schematic diagram of the needle pressing assembly structure;

[0021] Figure 8 Schematic diagram of the pressure needle mounting seat structure;

[0022] Fig. 9 Schematic diagram of the needle pressing structure;

[0023] Fig.10 Schematic diagram of the cover structure.

[0024] In the figure: 1, frame; 101, vertical plate; 102, platform; 2, fixing assembly; 201, OIS reed mounting seat; 2011, OIS reed mounting seat body; 2012, groove; 2013, reed avoidance groove; 2014, threaded hole; 202, cover plate; 2021, cover plate boss; 2022, through hole; 203, top cover; 2031, top cover body; 2032, top cover boss; 2033, cover plate groove; 3. Shell; 4. Laser rangefinder; 401. Reflector; 5. Press needle assembly; 501. Press needle mounting seat; 5011. Threaded portion; 5012. Connecting portion; 5013. Clamping portion; 502. Press needle; 5021. Needle fixing seat; 5022. Needle; 6. Driving mechanism; 601. Gear; 602. Rack; 7. OIS reed; 8. S-type pressure sensor; 9. Sliding slot block; 901. Sliding slot; 902. Support portion; 10. Slide rail. DETAILED DESCRIPTION

[0025] The present invention is described in more detail below using embodiments. The present invention can be embodied in a variety of different forms and should not be construed as being limited to the exemplary embodiments described herein.

[0026] For ease of description, spatially relative terms such as "upper", "lower", "left", "right", etc. may be used herein to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the elements described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here can be interpreted accordingly.

[0027] like Figures 1 to 3 As shown, the OIS spring elastic performance test device in this embodiment is provided with a frame 1; the frame 1 is composed of a vertical stand 101 and a horizontal platform 102; the OIS spring mounting seat 201 for fixing the OIS spring is fixedly installed on the top surface of the platform 102. The driving mechanism 6 of the pressing needle is arranged on the stand 101; wherein the movable part is arranged on the slide rail 10. The pressing needle 502 is fixed at the bottom end of the movable part, and the testing section of the OIS spring is pressed by the pressing needle 502; to obtain the K value and the maximum preload of the OIS spring.

[0028] The movable part is provided with a pressure sensor and a displacement sensor; the elastic force of the OIS spring after being compressed is measured by the pressure sensor; the elastic deformation of the OIS spring is obtained by the displacement sensor, and the K value can be obtained by calculation.

[0029] like Fig.10 As shown, in order to prevent the OIS reed body from moving when the test section is compressed, the OIS reed mounting seat is further provided with a cover plate 202; the OIS reed body is fixed to the OIS reed mounting seat by a cover plate boss 2021 provided on the side wall of the cover plate. A through hole 2022 is provided at the center of the cover plate 202, and a fixing screw passes through the through hole 2022 to fix the cover plate 202 to the OIS reed mounting seat.

[0030] In this embodiment, the pressure sensor is an S-type pressure sensor 8 ; such a pressure sensor has high strength and smaller deformation; and is more suitable for testing the OIS reed 7 of a micro motor.

[0031] Matching with the S-type pressure sensor, the displacement sensor is composed of a laser rangefinder 4 with higher displacement accuracy and a reflector 401. The laser rangefinder 4 is installed on the housing 3 of the movable part, and the reflector 401 is set at a corresponding position on the top surface of the platform.

[0032] The pressing needle drive mechanism is preferably driven by a stepper motor (not shown in the figure); the stepper motor has a low overload capacity, which helps to prevent the pressing needle from being damaged by excessive force; at the same time, there is no need to set a limit mechanism for the pressing needle drive mechanism, making the drive mechanism structure simpler.

[0033] The needle pressing driving mechanism adopts a transmission mechanism composed of a gear 601 and a rack 602; the structure is simple.

[0034] In order to prevent the test section from being deflected in the horizontal direction when under pressure, a top cover 203 is added, and the top cover and the OIS spring mounting seat are arranged to clamp the cantilever end of the OIS spring through a cantilever clamping structure that cooperates with each other; only the test section is exposed for the pressure needle to press. At this time, the fixing assembly 2 is composed of a cover plate 202, a top cover 203 and an OIS spring mounting seat 201; wherein the cover plate 202 is used to fix the OIS spring body; the cover plate is clamped in the cover plate groove 2033 on the lower end surface of the top cover 203; the top cover 203 and the OIS spring mounting seat 201 are fixedly connected by screws inserted into the threaded holes 2014; the top cover clamps most of the cantilever of the OIS spring, leaving only the test section free to move.

[0035] like Figure 4 As shown, the cantilever clamping structure is a top cover boss 2032 arranged on the lower end surface of the top cover body 2031 and a groove 2012 arranged on the top end surface of the OIS reed mounting seat body 2011; the top cover boss 2032 and the groove 2012 are used to clamp the OIS reed.

[0036] like Figure 5As shown, in order to measure the pre-pressure, a reed avoidance groove 2013 for adjusting the height position of the pressure needle is provided on the OIS reed mounting seat, so that the test section can bend downward under the pressure of the pressure needle and can be lower than the upper end surface of the OIS reed mounting seat.

[0037] like Figure 6 As shown, the pressing needle is composed of a needle head 5022 and a needle head fixing seat 5021. The pressing needle 502 can be directly fixedly installed at the bottom end of the pressing needle driving mechanism; or a pressing needle sliding groove block 9 can be set at the bottom end of the pressing needle driving mechanism; by changing the position of the pressing needle in the pressing needle sliding groove block 9, the different positions of the OIS spring can be aligned, and the K values ​​at different positions can be measured.

[0038] like Figures 7 to 9 As shown, the pressure needle assembly 5 is composed of a pressure needle 502 and a pressure needle mounting seat 501, and the pressure needle mounting seat 501 includes a threaded portion 5011, a connecting portion 5012, and a supporting portion 5013 connected in sequence; the pressure needle mounting seat 501 is fixedly connected to the pressure needle 502 through the thread of the threaded portion 5011; the cross-sectional size of the clamping portion 5013 of the pressure needle mounting seat 501 is larger than the width of the pressure needle sliding groove 901; and it is pre-installed in the inner cavity of the sliding groove block 9. When adjusting, rotate the pressure needle counterclockwise to gradually move the pressure needle and the clamping portion 5013 away from each other, then slide the pressure needle assembly 5 along the sliding groove 901 to the required position, and then rotate the pressure needle clockwise to finally clamp the supporting portion 902.

[0039] The stepper motor drives the gear to drive the rack; the pressure needle moves downward to press the test section of the OIS spring; at the same time, the displacement signal and pressure signal of the sensor are read through the intelligent control unit (not shown in the figure) to obtain the test data. The intelligent control unit can be an industrial computer, a single-chip microcomputer or a PLC.

[0040] The above examples are only used to illustrate the present invention. In addition, there are many different implementations. These implementations are all conceivable by those skilled in the art after understanding the concept of the present invention, so they are not listed here one by one.

Claims

1. OIS spring elastic performance testing device, characterized in that: It comprises an OIS spring installation seat, a cover plate, a pressure sensor, a displacement sensor, a pressure needle and a pressure needle driving mechanism; the OIS spring body is fixed on the OIS spring installation seat through a cover plate boss arranged on the side wall of the cover plate.

2. The OIS spring elasticity performance testing device according to claim 1, characterized in that: The pressure sensor is an S-type pressure sensor.

3. The OIS spring elasticity performance testing device according to claim 1, characterized in that: The displacement sensor is composed of a laser rangefinder and a reflector.

4. The OIS spring elasticity performance testing device according to claim 1, characterized in that: The needle pressing driving mechanism is driven by a stepping motor.

5. The OIS spring elasticity performance testing device according to claim 4, characterized in that: The needle pressing driving mechanism adopts a gear and rack mechanism.

6. The OIS spring elasticity performance testing device according to claim 1, characterized in that: It also includes a top cover, and the top cover and the OIS reed mounting seat are provided with a cantilever clamping structure that cooperates with each other to clamp the cantilever end of the OIS reed.

7. The OIS spring elasticity performance testing device according to claim 6, characterized in that: The cantilever clamping structure is a boss arranged on the lower end surface of the top cover and a groove arranged on the top end surface of the OIS spring installation seat; the boss and the groove cooperate to clamp the OIS spring.

8. The OIS spring elasticity performance testing device according to claim 1, characterized in that: It also includes a spring avoidance groove for adjusting the height position of the pressing needle.

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