MES-based tracking system for TP testing
Patent Information
- Application Number
- CN202210766509.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-07-01
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2042-07-01
AI Technical Summary
[0004]但是由于生产的产线规模较大,对产线增加检测工位的时候,需要大幅度调整产线结构和位置,整改时间长,需要耗费大量的人力物理,同时严重影响产品的生产加工效率;为此需要一种基于MES的TP测试用追踪系统
[0018]通过设置的MES系统模块、数据存储模块和测试模块,可对出货的产品都有一对一测试Log数据保存,没有经过测试与测试NG的产品MES系统判定NG,产品没有办法进行包装入库,可有效的防止产线漏测试问题;
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Figure CN115269287B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of TP testing technology, and in particular to a MES-based TP testing tracking system. Background Technology
[0002] Smartphones, tablets, smart furniture, cars, robots, and smart devices are ubiquitous. These electronic devices are composed of hundreds or thousands of components, and touchscreens are a small part of them. Assembly plants need to integrate and assemble all components. To ensure the performance of touchscreen products, manufacturers need to perform functional tests on the touchscreens during the manufacturing process and before shipment. Most touchscreen manufacturers operate on assembly lines, and it is easy for testing to be missed during the product manufacturing process. This results in defective products not being tested at the testing station and flowing directly to the assembly plant. This involves the cost of disassembly and rework for the assembly plant. In severe cases, it can damage the company's reputation in the industry and even raise questions about the company's design capabilities, factory manufacturing capabilities, and quality control management capabilities. Secondly, if the product is damaged at the assembly plant, it involves the issue of shirking responsibility between the assembly plant and the touchscreen manufacturer.
[0003] Application number CN201910612561X describes a MES system for an electronic workshop. The key technical points of this system include: a local area network (LAN) and a communication module for communication between the SMT assembly workshop and the office; a barcode scanner, a processor, and a display; the barcode scanner is located at each assembly station in the SMT assembly workshop, scanning the products at each station to obtain information about the product's location, and then transmitting this information to the office via the LAN, communication module, and processor, displaying it in real-time on the display. This MES system can monitor the location of PCB boards in real-time, sending the PCB location information to the office and displaying it on the display, allowing operators to easily and quickly understand the PCB location. While this application addresses product inspection issues in terms of mobility, it is not without its limitations.
[0004] However, due to the large scale of the production line, adding testing stations requires significant adjustments to the production line structure and location, which takes a long time and consumes a lot of manpower and resources, while also seriously affecting the production and processing efficiency of the products; therefore, a TP testing tracking system based on MES is needed. Summary of the Invention
[0005] The present invention proposes a tracking system for TP testing based on MES, which solves the problems existing in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A TP testing trace system based on MES includes an MES system module, a data storage module connected to the MES system module, and a test module connected to the data storage module.
[0008] A tracking system for TP testing based on MES also includes a mobile test station for carrying test modules. The test station includes: a lifting bracket, two sets of side baffles fixed to the top of the lifting bracket, a conveying unit disposed between the two sets of side baffles, end adjustment units disposed at both ends of the conveying unit, and an installation mechanism for mounting the test module disposed on the top of the conveying unit. A cover is installed on one of the side baffles away from the conveying unit, and an attitude adjustment mechanism connected to the end adjustment unit is installed inside the cover.
[0009] Preferably, the end adjustment unit includes a support plate with a U-shaped structure between two sets of side baffles. One end of the support plate is movably sleeved with a drive shaft. The outer rings of both ends of the drive shaft are slidably sleeved with adjustment tubes that are fixedly sleeved with the support plate. One end of the adjustment tube extending into the cover is fixedly sleeved with an adjustment gear. A horizontal plate that is movably sleeved with the adjustment tube is installed on one side of the adjustment gear. The end of the drive shaft extending out of the adjustment tube is fixedly connected to a drive unit located inside the cover. The outer ring of the drive shaft is fixedly sleeved with a drive roller located inside the support plate.
[0010] Preferably, the attitude adjustment mechanism includes a push plate slidably connected to the cover, an adjustment plate one fixedly connected to one end of the push plate near the end adjustment unit, a rotary adjustment groove formed on the adjustment plate one, a push rod one slidably connected to the rotary adjustment groove, an adjustment rack on the push rod one that meshes with the end adjustment unit, an adjustment plate two fixedly connected to the other end of the push plate near the end adjustment unit, a push groove formed on the adjustment plate two, a push rod two slidably sleeved with the push groove, and a connecting rod on the push rod two that is fixedly connected to the end adjustment unit. The top of the push plate is fixedly connected to the push unit one that is fixedly connected to the top of the cover.
[0011] Preferably, the installation mechanism includes a second pushing unit fixedly connected to the side baffle, a fixed plate fixedly connected to the bottom of the second pushing unit along the horizontal direction, a third pushing unit fixedly connected to the bottom of the fixed plate, a fourth pushing unit fixedly connected to the bottom output end of the third pushing unit, a conveying plate fixedly connected to the bottom of the fourth pushing unit, a suction cup fixedly connected to the bottom of the conveying plate, a connecting plate disposed on one side of the third pushing unit, a test fixture placement plate fixedly connected to the bottom of the connecting plate, and baffles disposed on both sides of the front end of the test fixture placement plate. A fifth pushing unit is installed on the side of the two sets of baffles that are close to each other. A positioning plate is fixedly connected to the output end of the fifth pushing unit. A data acquisition mounting plate fixedly connected to the connecting plate is installed on the top of the test fixture placement plate.
[0012] Preferably, the outer ring of the drive roller is fitted with a conveyor belt with an annular structure, and the inner ring of the conveyor belt is fitted with driven rollers distributed along the length direction of the support plate, and the driven rollers are movably fitted with the support plate.
[0013] Preferably, both sets of side baffles are permeated with an inclined guide groove that is slidably sleeved with the end adjustment unit. The opening of the guide groove is provided with a retaining groove on both sides along its length direction. The retaining groove is slidably sleeved with a retaining ring that is slidably sleeved with the end adjustment unit.
[0014] Preferably, the rotary adjustment groove includes a pushing groove 1, a stabilizing groove 1, and a pushing groove 2 connected sequentially from bottom to top on the adjustment plate 1, and the pushing groove 1, the stabilizing groove 1, and the pushing groove 2 are slidably sleeved with the pushing rod 1, and the pushing groove 1, the stabilizing groove 1, and the pushing groove 2 are all inclined; the pushing groove includes a stabilizing groove 2, a pushing groove 3, and a stabilizing groove 3 connected sequentially from bottom to top on the adjustment plate 2, the stabilizing groove 2, the pushing groove 3, and the stabilizing groove 3 are slidably sleeved with the pushing rod 2, the pushing groove 3 is inclined, the stabilizing groove 2 and the stabilizing groove 3 are arranged in a vertical direction, and the pushing groove 3 is parallel to the stabilizing groove 1;
[0015] During the downward movement of the push plate, when push rod one slides upward along push groove one towards stabilizing groove one, push rod two slides upward along stabilizing groove two. Since stabilizing groove two is set vertically, push rod two remains stationary while sliding along stabilizing groove two. At this time, push groove one gives push rod one a pushing force away from the push plate, thereby ensuring that the end adjustment unit is flipped.
[0016] When push rod 2 slides along push groove 3 and push rod 1 slides along stabilizing groove 1, since stabilizing groove 1 and push groove 3 remain parallel, it can be ensured that push rod 2 and push rod 1 remain relatively stationary when they move.
[0017] In this invention:
[0018] By setting up the MES system modules, data storage modules, and testing modules, one-to-one test log data can be saved for each shipped product. Products that have not been tested or have failed the test are judged as NG by the MES system and cannot be packaged and put into storage, which can effectively prevent the production line from missing tests.
[0019] By incorporating a lifting bracket, side baffles, conveying unit, installation mechanism, end adjustment unit, cover, attitude adjustment mechanism, support plate, drive shaft, adjustment tube, adjustment gear, drive unit, drive roller, cross plate, push plate, adjustment plate one, push rod one, adjustment rack, adjustment plate two, push rod two, connecting rod, push groove one, stabilizing groove one, push groove two, stabilizing groove two, push groove three, and stabilizing groove three, the test module can be installed and placed at any position on the production line for testing operations. The height and position can be adjusted according to the specific location on the production line, facilitating connection and integration with the production line, reducing the effort and cost of production line modifications, and rapidly improving product testing efficiency and quality. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a MES-based TP testing tracking system proposed in this invention;
[0021] Figure 2 This is a schematic diagram of the structure of a test station for a MES-based TP testing tracking system proposed in this invention;
[0022] Figure 3 This is a schematic diagram of the attitude adjustment mechanism of a test station for a MES-based TP testing tracking system proposed in this invention.
[0023] Figure 4 This is a schematic diagram of the end adjustment unit of a test station for a MES-based TP testing tracking system proposed in this invention;
[0024] Figure 5 This is a schematic diagram of the rotating adjustment groove and the pushing groove of the test station of the MES-based TP testing tracking system proposed in this invention.
[0025] In the diagram: 1 Lifting bracket, 2 Side baffle, 3 Conveying unit, 4 Installation mechanism, 5 End adjustment unit, 6 Cover, 7 Attitude adjustment mechanism, 51 Support plate, 52 Drive shaft, 53 Adjusting pipe, 54 Adjusting gear, 55 Drive unit, 56 Drive roller, 57 Horizontal plate, 71 Push plate, 72 Adjusting plate one, 73 Push rod one, 74 Adjusting rack, 75 Adjusting plate two, 76 Push rod two, 77 Connecting rod, 701 Push groove one, 702 Stabilizing groove one, 703 Push groove two, 704 Stabilizing groove two, 705 Push groove three, 706 Stabilizing groove three. Detailed Implementation
[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0027] Reference Figure 1 A TP testing tracking system based on MES includes an MES system module, a data storage module connected to the MES system module, and a test module connected to the data storage module.
[0028] Reference Figure 2-5 A tracking system for TP testing based on MES also includes a mobile test station for carrying test modules. The test station includes: a lifting bracket 1, two sets of side baffles 2 fixed to the top of the lifting bracket 1, a conveying unit 3 set between the two sets of side baffles 2, end adjustment units 5 set at both ends of the conveying unit 3, and a mounting mechanism 4 set on the top of the conveying unit 3 for mounting the test modules. A cover 6 is installed on the side of one of the side baffles away from the conveying unit 3, and an attitude adjustment mechanism 7 connected to the end adjustment unit 5 is installed inside the cover 6. When using the test station for testing, the control components are installed on the mounting mechanism 4. During testing, the test station is horizontally unfolded according to the testing needs and placed at the end of the TP touch screen production line for testing. Alternatively, the test station can be tilted at both ends and placed above the production line to connect with the production line for testing.
[0029] Furthermore, the end adjustment unit 5 includes a support plate 51 with a U-shaped structure between two sets of side baffles 2. One end of the support plate 51 is movably sleeved with a drive shaft 52. The outer rings of both ends of the drive shaft 52 are slidably sleeved with adjustment tubes 53 that are fixedly sleeved with the support plate 51. One end of the adjustment tube 53 extends into the cover 6 and is fixedly sleeved with an adjustment gear 54. A horizontal plate 57 that is movably sleeved with the adjustment tube 53 is installed on one side of the adjustment gear 54. The end of the drive shaft 52 that extends out of the adjustment tube 53 is fixedly connected to a drive unit 55 located inside the cover 6. The outer ring of the drive shaft 52 is fixedly sleeved with a drive roller 56 located inside the support plate 51.
[0030] Specifically, the attitude adjustment mechanism 7 includes a push plate 71 slidably connected to the cover 6, an adjustment plate 72 fixedly connected to one end of the push plate 71 near the end adjustment unit 5, a rotary adjustment groove opened on the adjustment plate 72, a push rod 73 slidably connected to the rotary adjustment groove, an adjustment rack 74 on the push rod 73 meshing with the adjustment gear 54 of the end adjustment unit 5, an adjustment plate 75 fixedly connected to the other end of the push plate 71 near the end adjustment unit 5, a push groove opened on the adjustment plate 75, a push rod 76 slidably sleeved with the push groove, and a connecting rod 77 fixedly connected to the horizontal plate 57 of the end adjustment unit 5 on the push rod 76. The top of the push plate 71 is fixedly connected to the push unit 71, which is fixedly connected to the top of the cover 6.
[0031] When adjusting the position and unfolding angle of the end adjustment unit 5 using the attitude adjustment mechanism 7, the push unit 1 is activated, and the push plate 71 moves downward. At this time, both the adjustment plate 1 72 and the adjustment plate 2 75 move downward. Under the action of the rotating adjustment groove and the push groove, the push rod 2 76 is initially kept in a stopped state, and the push rod 1 73 moves away from the push plate 71. At this time, the push rod 1 73 moves relative to the push rod 2 75. Then, the adjusting rack 74 moves relative to the connecting rod 77. Then, the adjusting rack 74 drives the adjusting gear 54 meshing with it to rotate, thereby causing the adjusting tube 53 to rotate. When the adjusting tube 53 rotates, the support plate 51 connected to it rotates, thereby causing the support plate 51 to rotate along the drive shaft 52, rotating and unfolding the end adjustment unit 5 from between the two sets of side baffles 2 towards the end. After rotation and unfolding, the end adjustment unit 5 is in an inclined state with the conveying unit 3. Then, the end adjustment unit 5 is pushed towards the end of the conveying unit 3, so that the end adjustment unit 5 remains parallel to one end of the adjacent conveying unit 3.
[0032] At this time, the push plate 71 continues to move downward. Under the continued action of the rotating adjustment groove and the pushing groove, the second push rod 76 and the first push rod 73 move synchronously to the side away from the push plate 71. At this time, the second push rod 76 and the first push rod 73 remain relatively stationary, which can ensure that the end adjustment unit 5 slides smoothly upward along the guide groove 61. When the end adjustment unit 5 slides to the uppermost end of the guide groove 61, the end adjustment unit 5 is in an inclined state and can be placed directly above the production line for testing.
[0033] When it is necessary to place the device at the end of the flow line in a horizontal position for testing, the push unit 1 continues to start, and the above method is used to adjust the end adjustment unit 5 to be parallel with the conveying unit 3. Finally, the lifting bracket 1 is used to adjust the test height to match the flow line.
[0034] Example 1:
[0035] The mounting mechanism 4 includes a pushing unit 2 fixedly connected to the side baffle 2, a fixed plate fixedly connected to the bottom of the pushing unit 2 along the horizontal direction, a pushing unit 3 fixedly connected to the bottom of the fixed plate, a pushing unit 4 fixedly connected to the bottom output end of the pushing unit 3, a conveying plate fixedly connected to the bottom of the pushing unit 4, a suction cup fixedly connected to the bottom of the conveying plate, a connecting plate set on one side of the pushing unit 3, a test fixture placement plate fixedly connected to the bottom of the connecting plate, and baffles set on both sides of the front end of the test fixture placement plate. A pushing unit 5 is installed on the side of the two sets of baffles that are close to each other. A positioning plate is fixedly connected to the output end of the pushing unit 5. A data acquisition mounting plate fixedly connected to the connecting plate is installed on the top of the test fixture placement plate.
[0036] Example 2:
[0037] The outer ring of the drive roller 56 is fitted with a conveyor belt with an annular structure, and the inner ring of the conveyor belt is fitted with driven rollers distributed along the length of the support plate 51, and the driven rollers are movably fitted with the support plate 51.
[0038] Example 3:
[0039] Both sets of side baffles 2 are permeated with inclined guide grooves 61 that are slidably sleeved with the end adjustment unit 5. Both sides of the opening of the guide grooves 61 are provided with retaining grooves along their length direction. The inside of each retaining groove is slidably sleeved with a retaining ring that is slidably sleeved with the end adjustment unit 5.
[0040] Example 4:
[0041] The rotary adjustment slot includes a push slot 701, a stabilizing slot 702, and a second push slot 703 connected sequentially from bottom to top on the adjustment plate 72. The push slot 701, stabilizing slot 702, and second push slot 703 are slidably sleeved with the push rod 73. The push slot 701, stabilizing slot 702, and second push slot 703 are all inclined. The push slot includes a stabilizing slot 704, a third push slot 705, and a third stabilizing slot 706 connected sequentially from bottom to top on the adjustment plate 75. The stabilizing slot 704, push slot 705, and third stabilizing slot 706 are slidably sleeved with the push rod 76. The third push slot 705 is inclined. The stabilizing slots 704 and 706 are arranged vertically. The push slot 705 is parallel to the stabilizing slot 702.
[0042] Example 5:
[0043] The MES system module includes a host with the MES system installed, a data storage module including a storage database containing Pass Log folders and Fail Log folders, and a testing module including a test host, a TP test board, a test fixture for placing products, and a barcode scanner. The test host is equipped with testing software, the test fixture is mounted on the test fixture placement board, the barcode scanner is mounted on the acquisition mounting board, and the test host is mounted on one side of the side baffle 2.
[0044] During testing, the product to be tested is placed on the test fixture on the test module. The placement slot on the test fixture positions the product, and then a barcode scanner is used to scan the QR code on the product. The scanner reads the current product information, and then the TP test board and test software are used to test the product. The test information and product information are transmitted together to the public disk data storage. The product QR code Log information obtained from scanning is then compared with the PassLog folder. The product QR code Log result is then fed back to the MES system for judgment. If the product QR code Log data is found in the PassLog folder, it is judged as OK; otherwise, it is judged as NG. Through this testing process, one-to-one test Log data can be saved for each product shipped. Products that have not been tested or that have failed the test are judged as NG by the MES system and cannot be packaged and put into storage, which can effectively prevent the production line from missing tests.
[0045] Example 6:
[0046] The lifting support 1 includes a support plate fixedly attached to the middle position of the bottom of two sets of side baffles 2. Both sides of the bottom of the support plate are equipped with U-shaped fixed frames. The bottom of the fixed frames is slidably connected to a U-shaped movable frame. The end of the movable frame is fixedly connected to a pushing unit 6. The output end of the pushing unit 6 is fixedly connected to the fixed frame.
[0047] Pushing unit 1, pushing unit 2, pushing unit 4, pushing unit 5 and pushing unit 6 all use push rod motors, while pushing unit 3 uses a linear module.
[0048] Example 7:
[0049] The drive unit 55 includes a gear 1 that is fixedly sleeved with the outer ring of the drive shaft 52. A gear 2 meshes with one side of the gear 1. A rotating shaft that is fixedly sleeved with the horizontal plate 57 is movably sleeved with the gear 2. One end of the rotating shaft is connected to a motor that is fixedly connected with the horizontal plate 57. The conveying unit 3 adopts a belt conveyor line.
[0050] This design firstly saves one-to-one test log data for each shipped product. Products that have not been tested or that fail the test are deemed NG by the MES system and cannot be packaged and put into storage, which can effectively prevent the problem of missed testing on the production line.
[0051] Secondly, the testing module can be installed and placed anywhere on the production line to perform testing operations according to the product manufacturing needs. The height and position can be adjusted according to the specific location of the production line, which facilitates docking and connection with the production line, reduces the effort and cost of production line modification, and quickly improves product testing efficiency and quality.
[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A tracking system for TP testing based on MES, characterized in that, It includes an MES system module, a data storage module connected to the MES system module, and a test module connected to the data storage module; It also includes a mobile test station for carrying the test module. The test station includes: a lifting bracket, two sets of side baffles fixed to the top of the lifting bracket, a conveying unit disposed between the two sets of side baffles, end adjustment units disposed at both ends of the conveying unit, and an installation mechanism for installing the test module disposed on the top of the conveying unit. A cover is installed on one of the side baffles away from the conveying unit, and an attitude adjustment mechanism connected to the end adjustment unit is installed inside the cover. The end adjustment unit includes a support plate with a U-shaped structure between two sets of side baffles. One end of the support plate is movably sleeved with a drive shaft. The outer rings of both ends of the drive shaft are slidably sleeved with adjustment tubes that are fixedly sleeved with the support plate. One end of the adjustment tube extends into the cover and is fixedly sleeved with an adjustment gear. A horizontal plate that is movably sleeved with the adjustment tube is installed on one side of the adjustment gear. The end of the drive shaft that extends out of the adjustment tube is fixedly connected to a drive unit located inside the cover. The outer ring of the drive shaft is fixedly sleeved with a drive roller located inside the support plate. The attitude adjustment mechanism includes a push plate slidably connected to the cover, an adjustment plate one fixedly connected to one end of the push plate near the end adjustment unit, a rotary adjustment groove opened on the adjustment plate one, a push rod one slidably connected to the rotary adjustment groove, an adjustment rack on the push rod one that meshes with the end adjustment unit, an adjustment plate two fixedly connected to the other end of the push plate near the end adjustment unit, a push groove opened on the adjustment plate two, a push rod two slidably sleeved with the push groove, and a connecting rod on the push rod two that is fixedly connected to the end adjustment unit. The top of the push plate is fixedly connected to the push unit one that is fixedly connected to the top of the cover. The rotary adjustment groove includes a first pushing groove, a first stabilizing groove, and a second pushing groove, which are connected sequentially from bottom to top on the first adjustment plate. The first pushing groove, the first stabilizing groove, and the second pushing groove are slidably sleeved with the first pushing rod. The first pushing groove, the first stabilizing groove, and the second pushing groove are all inclined. The pushing groove includes a second stabilizing groove, a third pushing groove, and a third stabilizing groove, which are connected sequentially from bottom to top on the second adjustment plate. The second stabilizing groove, the third pushing groove, and the third stabilizing groove are slidably sleeved with the second pushing rod. The third pushing groove is inclined. The second stabilizing groove and the third stabilizing groove are arranged in a vertical direction. The third pushing groove is parallel to the first stabilizing groove.
2. The MES-based TP testing tracking system according to claim 1, characterized in that, The installation mechanism includes a second pushing unit fixed to the side baffle, a fixed plate fixed to the bottom of the second pushing unit along the horizontal direction, a third pushing unit fixed to the bottom of the fixed plate, a fourth pushing unit fixed to the bottom output end of the third pushing unit, a conveying plate fixed to the bottom of the fourth pushing unit, a suction cup fixed to the bottom of the conveying plate, a connecting plate set on one side of the third pushing unit, a test fixture placement plate fixed to the bottom of the connecting plate, and baffles set on both sides of the front end of the test fixture placement plate. A fifth pushing unit is installed on the side of the two sets of baffles that are close to each other. A positioning plate is fixed to the output end of the fifth pushing unit. A data acquisition mounting plate fixed to the connecting plate is installed on the top of the test fixture placement plate.
3. The MES-based TP testing tracking system according to claim 1, characterized in that, The outer ring of the drive roller is fitted with a conveyor belt with an annular structure, and the inner ring of the conveyor belt is fitted with driven rollers distributed along the length of the support plate, and the driven rollers are movably fitted with the support plate.
4. The MES-based TP testing tracking system according to claim 1, characterized in that, Both sets of side baffles are permeated with an inclined guide groove that is slidably sleeved with the end adjustment unit. The opening of the guide groove is provided with a retaining groove on both sides along its length direction. The retaining groove is slidably sleeved with a retaining ring that is slidably sleeved with the end adjustment unit.
Citation Information
Patent Citations
Output statistical method, device and equipment and readable storage medium
CN109615308A