An automatic testing device for a handwriting pen

Abstract

The utility model discloses a handwriting pen automation test equipment, including frame, control device, X axis moving mechanism, Y axis moving mechanism, Z axis moving mechanism, R axis rotating mechanism and mesa board, is equipped with marble pedestal on the frame, is equipped with force sensor no.

Description

Technical Field

[0001] This utility model relates to the field of stylus technology, and more specifically, to an automated testing device for styluses. Background Technology

[0002] With the widespread use of tablets, smartphones, and other terminal devices, styluses, as an important input tool, have garnered significant attention for their performance. The drawing effect, pressure sensitivity accuracy, and responsiveness of a stylus directly impact user experience, making automated testing essential. Currently, stylus testing for terminal devices primarily relies on manual methods. Testers manually operate the stylus on the terminal device to draw and write, judging its performance based on subjective feelings. This method has several drawbacks: first, it is inefficient and cannot meet the needs of large-scale production testing; second, it lacks precision, as the pressure and speed of manual operation are unstable, leading to significant errors in test results; third, the number of test items is limited, failing to comprehensively cover all performance indicators of the stylus; and fourth, it is labor-intensive, with prolonged testing easily causing tester fatigue and affecting test accuracy. Utility Model Content

[0003] This utility model provides an automated testing device for styluses to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: An automated testing device for styluses includes a frame, a control device, an X-axis moving mechanism, a Y-axis moving mechanism, a Z-axis moving mechanism, an R-axis rotating mechanism, and a table panel; the frame is provided with a marble base, the X-axis moving mechanism is located on the marble base, the Y-axis moving mechanism is located on the X-axis moving mechanism, the Z-axis moving mechanism is located on the Y-axis moving mechanism, and the R-axis rotating mechanism is located on the Z-axis moving mechanism; a force sensor is provided on the R-axis rotating mechanism, and a clamp is provided on the force sensor for holding the styluse;

[0004] Force sensors are provided at the four corners of the tabletop, and the tabletop is connected to the marble base through the force sensors. The control device is located at the bottom of the frame and is electrically connected to the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis moving mechanism, the R-axis rotating mechanism and the force sensors.

[0005] Preferably, the X-axis moving mechanism includes a gantry frame, a linear motor, and a pair of linear guide rails, the pair of linear guide rails being arranged parallel to each other on the marble base; the gantry frame is slidably mounted on the pair of linear guide rails; the linear motor is connected to the gantry frame and drives the gantry frame to slide back and forth on the linear guide rails; a photoelectric limiting mechanism is provided next to the linear motor.

[0006] Preferably, the Y-axis moving mechanism includes a connecting seat, a second linear motor, and a second linear guide rail, the second linear guide rail being mounted on the gantry frame; the connecting seat is slidably mounted on the second linear guide rail, the second linear motor is connected to the connecting seat and drives the connecting seat to reciprocate on the second linear guide rail; a second photoelectric limiting mechanism is provided next to the second linear motor.

[0007] Preferably, the Z-axis moving mechanism includes a support arm, a linear motor, and a pair of linear guide rails, the pair of linear guide rails being arranged parallel to each other on the connecting seat; the support arm is slidably mounted on the pair of linear guide rails, the linear motor is connected to the support arm and drives the support arm to reciprocate on the linear guide rails; a photoelectric limiting mechanism is provided next to the linear motor.

[0008] Preferably, the R-axis rotation mechanism includes a rotary motor, a connecting sleeve, an annular baffle, and a limit switch. The rotary motor is connected to the support arm, one end of the connecting sleeve is connected to the output shaft of the rotary motor, and the other end is connected to the force sensor. The annular baffle is disposed on the outer side wall of the connecting sleeve, and the limit switch is disposed on the support arm. The annular baffle and the limit switch are configured to cooperate with each other.

[0009] Preferably, the control device includes an industrial control computer, and a display, mouse and keyboard, high-speed data acquisition card, and motion control card connected to the industrial control computer; the high-speed data acquisition card is used to acquire various dynamic signals generated during the stylus pen test in real time, and convert the dynamic signals into digital data that the industrial control computer can process; the motion control card is electrically connected to the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis moving mechanism, and the R-axis rotating mechanism, and controls their movement trajectory, speed, and position.

[0010] Preferably, the tabletop is a replaceable tabletop.

[0011] Preferably, both the first force sensor and the second force sensor are weighing sensors.

[0012] Compared with existing technologies, the advantages of this invention are as follows: This invention features a reasonable design and simple structure. It utilizes a marble base combined with high-precision X-axis, Y-axis, Z-axis, and R-axis rotation mechanisms, and incorporates force sensors one and two for pressure monitoring. Linear motors along the three axes enable precise movement and downward pressure of the stylus on the tabletop, simulating various operations for testing. The R-axis rotation mechanism allows for vertical testing of the stylus or testing at angles within 45 degrees. Furthermore, this invention is equipped with a high-speed signal acquisition card, enabling high-sampling-rate, high-precision data acquisition and analysis. This invention automates the stylus testing process, significantly reducing personnel workload and increasing testing efficiency, meeting the needs of mass production. Simultaneously, the testing process is stable, with small testing errors and high accuracy. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the automated testing device for handwriting pens according to an embodiment of the present invention;

[0014] Figure 2 This is an internal structural diagram of the automated testing device for handwriting pens according to an embodiment of the present utility model;

[0015] Figure 3 This is a top view of the internal structure of the automated testing device for handwriting pens according to an embodiment of this utility model;

[0016] Figure 4 This is a structural diagram showing another perspective of the internal structure of the automated testing device for a stylus pen according to an embodiment of the present invention.

[0017] Figure 5 for Figure 4 Enlarged view of point A in the middle

[0018] exist Figures 1 to 5 In the diagram, the correspondence between the component names and the drawing numbers is as follows:

[0019] 1--Frame, 2--Control device, 3--X-axis moving mechanism, 301--Gantry, 302--Linear motor I, 303--Linear guide rail I, 304--Photoelectric limit mechanism I, 4--Y-axis moving mechanism, 401--Connecting seat, 402--Linear motor II, 403--Linear guide rail II, 404--Photoelectric limit mechanism II, 5--Z-axis moving mechanism, 501--Support arm, 502--Linear motor III, 503--Linear guide rail III, 504--Photoelectric limit mechanism III, 6--R-axis rotating mechanism, 601--Rotating motor, 602--Connecting sleeve, 603--Annular baffle, 604--Limit switch, 7--Table panel, 8--Marble base, 9--Force sensor I, 10--Clamping device, 11--Stylus pen, 12--Force sensor II. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please refer to Figures 1 to 5 This utility model provides an automated testing device for a stylus, including a frame 1, a control device 2, an X-axis moving mechanism 3, a Y-axis moving mechanism 4, a Z-axis moving mechanism 5, an R-axis rotating mechanism 6, and a platform 7; the frame 1 is provided with a marble base 8, the X-axis moving mechanism 3 is provided on the marble base 8, the Y-axis moving mechanism 4 is provided on the X-axis moving mechanism 3, the Z-axis moving mechanism 5 is provided on the Y-axis moving mechanism 4, and the R-axis rotating mechanism 6 is provided on the Z-axis moving mechanism 5; the R-axis rotating mechanism 6 is provided with a force sensor 9, and the force sensor 9 is provided with a clamp 10, which is used to hold a stylus 11;

[0024] Force sensors 12 are provided at the four corners of the tabletop 7, and the tabletop 7 is connected to the marble base 8 through the force sensors 12. The control device 2 is located at the bottom of the frame 1 and is electrically connected to the X-axis moving mechanism 3, the Y-axis moving mechanism 4, the Z-axis moving mechanism 5, the R-axis rotating mechanism 6 and the force sensors.

[0025] In this embodiment, the X-axis movement mechanism 3 and the Y-axis movement mechanism 4 can simulate the writing trajectory of the stylus 11 on a plane (such as straight lines, curves, and characters), the Z-axis movement mechanism 5 can simulate the pressure changes applied by the stylus 11 to the writing surface (corresponding to different writing effects), and the R-axis rotation mechanism 6 can simulate the tilt angle or rotation posture of the stylus 11 during writing (such as changes in the direction of the pen tip). These dimensions of motion control can cover the core action scenarios of the stylus 11 in actual use.

[0026] This embodiment of the device is equipped with two types of force sensors, forming a bidirectional force detection mechanism. Force sensor 9 is located at the end of clamp 10, directly installed between the R-axis rotation mechanism 6 and clamp 10. It can monitor the pressure applied by the stylus 11 itself in real time (such as the active pressure of the pen tip on the table surface), accurately capturing dynamic changes in pressure during writing (such as differences in force at the beginning, middle, and end of the stroke). Force sensor 12 is located at the end of the table panel 7, distributed at the four corners of the table panel 7 and connected to the marble base 8. Through force analysis at the four corners, the magnitude and location of the pressure exerted by the pen tip on the table surface can be indirectly calculated, avoiding test errors caused by the failure of a single sensor. The table panel 7 is connected to the marble base 8 through the pressure sensors. The marble base 8 has high rigidity, low deformation, and good temperature stability, effectively reducing the impact of external vibrations (such as ground vibration and impact from mechanical movement) and environmental temperature changes on the testing system, improving the accuracy of pressure detection.

[0027] In this embodiment, the integrated connection of the control device 2 with all motion mechanisms (X / Y / Z / R axes), force sensor 9, and force sensor 12 enables fully automated control of the entire process. Test parameters, such as the trajectory path, movement speed, pressure threshold, and tilt angle of the stylus 11, can be preset. The program drives the coordinated movement of each axis, replacing manual operation and reducing the interference of human factors on the test results. Furthermore, automated control can accurately reproduce the same test conditions, ensuring consistency across multiple tests and providing reliable data support for the quantitative analysis of the stylus 11's performance. This embodiment integrates the control system at the bottom of the frame 1, saving space and reducing interference between the control module and the motion mechanisms, thus ensuring system stability.

[0028] The working process of this utility model is as follows:

[0029] The stylus 11 to be tested is manually fixed onto the fixture 10. The control device 2 initializes each axis movement mechanism (X, Y, Z axes) and rotation mechanism (R axis) to ensure they are in their initial positions. The tabletop 7 is connected to the marble base 8 through force sensors 12 at the four corners, forming a stable writing test reference surface. According to the preset test program, the control device 2 sends commands to each axis mechanism. The X-axis movement mechanism 3 and the Y-axis movement mechanism 4 work together to drive the Z-axis movement mechanism 5, the R-axis rotation mechanism 6, and the stylus 11 to move on the horizontal plane, simulating the planar writing trajectory of the stylus 11. 5. The stylus 11 is moved up and down to adjust the contact pressure between the pen tip and the table panel 7; the R-axis rotation mechanism 6 controls the stylus 11 to rotate around its own axis to adjust the pen tip tilt angle; force sensor 19 detects the pen tip pressure applied by the stylus 11 in real time and transmits the data back to the control device 2 to ensure that the pressure meets the test setting value; force sensors 22 at the four corners of the table panel 7 detect the overall force distribution when the stylus 11 contacts the table surface to help judge the contact stability; the control device 2 dynamically adjusts the motion parameters of each axis mechanism according to the real-time data fed back by the sensors to ensure the accuracy and consistency of the test process. After all preset working condition tests are completed, the control device 2 drives each axis mechanism to reset, releases the clamp 10 to remove the stylus 11, and records and stores various data during the test process for subsequent analysis of the stylus 11 performance.

[0030] Preferably, the X-axis moving mechanism 3 includes a gantry frame 301, a linear motor 302, and a pair of linear guide rails 303, which are parallel to each other on the marble base 8. The gantry frame 301 is slidably mounted on the pair of linear guide rails 303. The linear motor 302 is connected to the gantry frame 301 and drives the gantry frame 301 to reciprocate on the linear guide rails 303. A photoelectric limiting mechanism 304 is provided next to the linear motor 302. In this embodiment, the pair of parallel linear guide rails 303 provide precise guidance for the gantry frame 301. The double guide rail support effectively suppresses the tilting or swaying of the gantry frame 301 during movement. Combined with the high rigidity and low deformation characteristics of the marble base 8, this further ensures the straightness and positional accuracy of the movement in the X-axis direction.

[0031] A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy by expanding a closed magnetic field into an open magnetic field, without requiring any intermediate conversion mechanisms. Because some mechanical transmission components with large response time constants are directly eliminated from the system, the dynamic response performance of the entire closed-loop control system is greatly improved, featuring fast response speed, smooth motion, and high positioning accuracy, and is suitable for high-speed reciprocating motion. In this embodiment, linear motor 302 directly drives the gantry 301, which can meet the high-precision requirements for dynamic trajectory simulation in the stylus 11 test.

[0032] The photoelectric limit mechanism 304 consists of a shielding plate and several photoelectric switches. The shielding plate can be installed on the moving structure of the gantry 301 or the linear motor 302. The photoelectric switches are fixedly installed next to the linear motor. When the shielding plate triggers the photoelectric switches, it can assist the linear motor in limiting the movement, so as to accurately monitor the movement limit, prevent overtravel damage, and enhance the safety of equipment operation.

[0033] Preferably, the Y-axis moving mechanism 4 includes a connecting seat 401, a second linear motor 402, and a second linear guide rail 403. The second linear guide rail 403 is mounted on the gantry frame 301. The connecting seat 401 is slidably mounted on the second linear guide rail 403. The second linear motor 402 is connected to the connecting seat 401 and drives the connecting seat 401 to reciprocate on the second linear guide rail 403. A photoelectric limiting mechanism 404 is provided next to the second linear motor 402. In this embodiment, a linear motor 402 directly drives the connecting seat 401, eliminating the backlash and friction of traditional transmissions. This results in fast response speed and high positioning accuracy, making it suitable for the high-precision requirements of the stylus 11 for dynamic trajectory testing. The linear guide rail 403 provides stable guidance for the connecting seat 401, ensuring linearity of movement, reducing swaying, and improving overall operational stability. The connecting seat 401 has a compact structure, which can stably support the Z-axis and subsequent mechanisms, balancing rigidity and lightweight design. The photoelectric limit mechanism 404 accurately monitors the movement limits, preventing overtravel damage and enhancing the safety of equipment operation.

[0034] Preferably, the Z-axis moving mechanism 5 includes a support arm 501, a linear motor 502, and a pair of linear guide rails 503, the pair of linear guide rails 503 being arranged parallel to each other on the connecting seat 401; the support arm 501 is slidably arranged on the pair of linear guide rails 503, the linear motor 502 is connected to the support arm 501 and drives the support arm 501 to reciprocate on the linear guide rails 503; a photoelectric limiting mechanism 504 is provided next to the linear motor 502. In this embodiment, linear motor 502 directly drives support arm 501, providing rapid response and precise positioning, adapting to the fine adjustment requirements of pen tip pressure during stylus 11 testing. A pair of parallel linear guides 503 provide stable guidance for support arm 501, effectively suppressing sway during movement and ensuring the straightness and stability of vertical movement along the Z-axis. Support arm 501 has a strong structural rigidity, firmly supporting the R-axis and stylus 11 components, reducing deformation caused by load. Photoelectric limit mechanism 504 accurately monitors movement limits, improving operational safety. The overall design coordinates with the X and Y axes to better achieve high-precision testing actions in three-dimensional space.

[0035] Preferably, the R-axis rotation mechanism 6 includes a rotary motor 601, a connecting sleeve 602, an annular baffle 603, and a limit switch 604. The rotary motor 601 is connected to the support arm 501. One end of the connecting sleeve 602 is connected to the output shaft of the rotary motor 601, and the other end is connected to the force sensor 9. The annular baffle 603 is disposed on the outer side wall of the connecting sleeve 602, and the limit switch 604 is disposed on the support arm 501. The annular baffle 603 and the limit switch 604 are configured to cooperate with each other. In this embodiment, the rotary motor 601 directly drives the connecting sleeve 602, resulting in a short transmission link, rapid response, and high rotational accuracy. This allows for quick adjustment of the stylus 11's tilt angle, adapting to simulation tests of different pen-holding postures. The connecting sleeve 602 has a simple structure and good rigidity, ensuring stable transmission of motor power while guaranteeing that the force sensor 9 can accurately collect pen tip pressure, reducing force transmission loss. Its hollow structure also facilitates the passage of the force sensor 9's wiring harness. The annular baffle 603, in conjunction with the limit switch 604, precisely limits the rotation range, preventing over-travel rotation that could damage the mechanism and improving operational safety.

[0036] Preferably, the control device 2 includes an industrial control computer, and a display, mouse and keyboard, high-speed data acquisition card, and motion control card connected to the industrial control computer. The high-speed data acquisition card is used to acquire various dynamic signals generated during the testing process of the stylus 11 in real time and convert the dynamic signals into digital data that the industrial control computer can process. The motion control card is electrically connected to the X-axis moving mechanism 3, the Y-axis moving mechanism 4, the Z-axis moving mechanism 5, and the R-axis rotating mechanism 6, and controls their movement trajectory, speed, and position. In this embodiment, the industrial control computer serves as the core, possessing high stability and strong computing power, adapting to the needs of long-term automated testing. The display and mouse and keyboard form an intuitive human-computer interaction interface, facilitating parameter setting, process monitoring, and data viewing. The high-speed data acquisition card can capture and digitize dynamic signals (such as pressure and position) during testing in real time and with high precision, providing accurate raw data for performance analysis. The motion control card precisely regulates the trajectory, speed, and position of the multi-axis mechanisms, achieving coordinated linkage of each axis and ensuring the consistency and standardization of test actions. The two work together to form a closed-loop control, enabling the device to have both efficient data acquisition and precise motion execution capabilities, greatly improving the automation level and reliability of the stylus 11 test results.

[0037] Furthermore, equipped with a self-developed high-speed signal acquisition card and motion control card, the sampling frequency can reach 100-10000 times / second, enabling real-time recording and analysis of force and displacement.

[0038] In addition, this embodiment also has an overload protection function, with 10 times overload protection for the sensor body hardware, and the software will immediately reverse the movement within 1ms when an overload is detected. At the same time, multiple limit protections are provided to ensure the safety of the equipment and the product under test.

[0039] Preferably, the work surface 7 is a replaceable work surface 7. By setting it as a replaceable structure, the work surface can be replaced according to different materials, thus realizing the adaptation test of different writing surface materials.

[0040] Preferably, both the force sensor 9 and the force sensor 12 are weighing sensors.

[0041] Compared with existing technologies, the advantages of this invention are as follows: This invention features a reasonable design and simple structure. It utilizes a marble base combined with high-precision X-axis, Y-axis, Z-axis, and R-axis rotation mechanisms, and incorporates force sensors one and two for pressure monitoring. Linear motors along the three axes enable precise movement and downward pressure of the stylus on the tabletop, simulating various operations for testing. The R-axis rotation mechanism allows for vertical testing of the stylus or testing at angles within 45 degrees. Furthermore, this invention is equipped with a high-speed signal acquisition card, enabling high-sampling-rate, high-precision data acquisition and analysis. This invention automates the stylus testing process, significantly reducing personnel workload and increasing testing efficiency, meeting the needs of mass production. Simultaneously, the testing process is stable, with small testing errors and high accuracy.

[0042] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An automated testing device for styluses, characterized in that, The device includes a frame (1), a control device (2), an X-axis moving mechanism (3), a Y-axis moving mechanism (4), a Z-axis moving mechanism (5), an R-axis rotating mechanism (6), and a tabletop (7); the frame is provided with a marble base (8), the X-axis moving mechanism is provided on the marble base, the Y-axis moving mechanism is provided on the X-axis moving mechanism, the Z-axis moving mechanism is provided on the Y-axis moving mechanism, and the R-axis rotating mechanism is provided on the Z-axis moving mechanism; the R-axis rotating mechanism is provided with a force sensor (9), and the force sensor is provided with a clamp (10), which is used to hold a stylus (11); Force sensors 2 (12) are respectively provided at the four corners of the table panel, and the table panel is connected to the marble base through the force sensors 2; the control device is located at the bottom of the frame and is electrically connected to the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis moving mechanism, the R-axis rotating mechanism and the force sensors respectively.

2. The automated testing device for handwriting pens according to claim 1, characterized in that, The X-axis moving mechanism includes a gantry frame (301), a linear motor (302), and a pair of linear guide rails (303). The pair of linear guide rails are arranged parallel to each other on the marble base. The gantry frame is slidably mounted on the pair of linear guide rails. The linear motor is connected to the gantry frame and drives the gantry frame to slide back and forth on the linear guide rails. A photoelectric limiting mechanism (304) is provided next to the linear motor.

3. The automated testing device for handwriting pens according to claim 2, characterized in that, The Y-axis moving mechanism includes a connecting seat (401), a second linear motor (402), and a second linear guide rail (403). The second linear guide rail is mounted on the gantry frame. The connecting seat is slidably mounted on the second linear guide rail. The second linear motor is connected to the connecting seat and drives the connecting seat to reciprocate on the second linear guide rail. A second photoelectric limiting mechanism (404) is provided next to the second linear motor.

4. The automated testing device for handwriting pens according to claim 3, characterized in that, The Z-axis moving mechanism includes a support arm (501), a linear motor (502), and a pair of linear guide rails (503). The pair of linear guide rails are arranged parallel to each other on the connecting seat. The support arm is slidably mounted on the pair of linear guide rails. The linear motor is connected to the support arm and drives the support arm to slide back and forth on the linear guide rails. A photoelectric limiting mechanism (504) is provided next to the linear motor.

5. The automated testing device for styluses according to claim 4, characterized in that, The R-axis rotation mechanism includes a rotary motor (601), a connecting sleeve (602), an annular baffle (603), and a limit switch (604). The rotary motor is connected to the support arm. One end of the connecting sleeve is connected to the output shaft of the rotary motor, and the other end is connected to the force sensor. The annular baffle is disposed on the outer wall of the connecting sleeve, and the limit switch is disposed on the support arm. The annular baffle and the limit switch are configured to cooperate with each other.

6. The automated testing device for handwriting pens according to claim 1, characterized in that, The control device includes an industrial control computer, and a display, mouse and keyboard, high-speed data acquisition card, and motion control card connected to the industrial control computer. The high-speed data acquisition card is used to acquire various dynamic signals generated during the handwriting pen test in real time and convert the dynamic signals into digital data that can be processed by the industrial control computer. The motion control card is electrically connected to the X-axis moving mechanism, the Y-axis moving mechanism, the Z-axis moving mechanism, and the R-axis rotating mechanism, and controls their movement trajectory, speed, and position.

7. The automated testing device for handwriting pens according to claim 1, characterized in that, The tabletop is a replaceable tabletop.

8. The automated testing device for handwriting pens according to claim 1, characterized in that, Both the force sensor one and the force sensor two are weighing sensors.

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