Pressure calibration structure

Abstract

The utility model relates to a pressure calibration structure, which comprises a fixed seat, a driving assembly capable of controlling the fixed seat to act at a constant speed and a movable rod arranged on the fixed seat in a sliding manner, a plurality of balancing weights are arranged on the fixed seat, each balancing weight slides relative to the fixed seat, and the movable rod is arranged on the fixed seat. The balancing weights are sequentially arranged in the movement direction of the movable rod, the driving assembly controls the movement direction of the fixed base, and the movement direction of the movable rod is the same as the sliding direction of each balancing weight. According to the utility model, the movable rod is utilized to push the balancing weights to control the magnitude of the pressure acting on the touch screen in real time, and further, the plurality of balancing weights can be sequentially pushed by the movable rod, so that the pressure of different gears can be applied to the touch screen for testing without changing the gravity of the balancing weights; and the applied pressure is stable.

Description

Technical Field

[0001] The utility model belongs to the field of pressure calibration, and particularly relates to a pressure calibration structure. Background Art

[0002] Before leaving the factory, the touch screen needs to perform pressure calibration and linear value test at various positions of the touch screen to detect the situation of the touch screen being touched and pressed, so as to ensure whether the sensitivity of the touch screen is qualified.

[0003] The existing pressure calibration test usually uses a pressure calibration device in the form of a sensor. When it does not touch the surface of the product, there is no data feedback. When it touches the surface of the product, the pressure starts to increase iteratively. After reaching the specified value, the sensor feeds back data. However, there is a certain time delay in the sensor feedback data. During this delay process, the servo will continue to act and pressurize without receiving a signal, so there is a defect that the pressure value is unstable. At the same time, the pressure applied to the surface of the product will continue to increase, resulting in the feedback data not meeting the predetermined value. At the same time, since the pressure calibration tooling in the form of a sensor moves point by point during calibration, there is also a problem of low efficiency. Summary of the Invention

[0004] The purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a pressure calibration structure, which solves the problems of unstable pressure value of the pressure calibration device and low test efficiency.

[0005] The technical solution of the utility model: A pressure calibration structure includes a fixed seat, a driving component capable of controlling the uniform movement of the fixed seat, and a movable rod slidably arranged on the fixed seat. A plurality of counterweight blocks are arranged above the fixed seat. Each counterweight block slides relative to the fixed seat, and each counterweight block is arranged in sequence along the movement direction of the movable rod. The driving component controls the movement direction of the fixed seat, the movement direction of the movable rod, and the sliding direction of each counterweight block to be the vertical direction, and the movable rod can push each counterweight block to move in sequence.

[0006] By adopting the above technical solution, the movable rod is used to push the counterweight block to control the pressure applied to the touch screen in real time. Further, a plurality of counterweight blocks are arranged, which can be sequentially pushed by the movable rod. Without changing the gravity of the counterweight block, different gears of pressure can be applied to the touch screen for testing. At the same time, the applied pressure is stable, and there is no need to move point by point, so the test efficiency is high.

[0007] A further setting of the utility model is that a plurality of limiting rods with different heights are arranged above the fixed seat. Each limiting rod is fixedly connected to the fixed seat, and each stage of the counterweight block is slidably connected to the corresponding limiting rod.

[0008] With the above further settings, each of the counterweight blocks is correspondingly provided with the limiting rod to limit the position of the corresponding counterweight block, preventing the counterweight block from contacting the adjacent counterweight block under the influence of external force, so as to ensure that all the counterweight blocks are sequentially pushed by the movable rod, thereby ensuring that multiple gears of pressure can be applied to the touch screen under the movable rod.

[0009] In a further setting of the present utility model, the movable rod includes a measuring round head, a sliding rod slidably connected to the fixed seat, and a limiting end for contacting and pushing the counterweight block, and the size of the limiting end is wider than that of the sliding rod.

[0010] With the above further settings, the test round head can contact the touch screen, and the contact position is a point, which can more accurately contact the test position of the touch screen. The limiting end can limit the sliding range of the movable rod to prevent it from falling off the fixed seat.

[0011] In a further setting of the present utility model, the driving assembly includes a mounting seat, a first driving device, and a first guide rail slider pair fixedly connected to the output end of the first driving device, and the first guide rail slider pair is fixedly connected to the fixed seat through a connecting member.

[0012] With the above further settings, the first driving device is used to drive the fixed seat to move or lock, so that after the movable rod contacts the touch screen, the fixed seat can be controlled to move at a constant speed, preventing the acceleration from affecting the calibrated test pressure, and after the calibrated measurement is completed, it can be reset by reverse driving.

[0013] In a further setting of the present utility model, it further includes a positioning assembly and a control assembly. The driving assembly is arranged on the positioning assembly. The positioning assembly includes a mounting bracket, a telescopic support foot, a second guide rail slider pair for fixing the mounting seat, and a second driving device for driving the slider in the second guide rail slider pair. The second driving device and the second guide rail slider pair are both arranged on the mounting bracket.

[0014] With the above further settings, by setting the positioning assembly, the second driving device can be driven to adjust the position of the mounting seat, so as to adjust the positions of the fixed seat and the movable rod, and different positions of the touch screen can be detected.

[0015] In a further setting of the present utility model, the control assembly is arranged on the connecting member. Two sensors are provided on both the mounting seat and the mounting bracket. Sensor stoppers for assisting the sensors to detect are provided on both the connecting member and the mounting seat. The first driving device, the second driving device, and the four sensors are all electrically connected to the control assembly.

[0016] With the above further settings, sensors are provided on the mounting base and the mounting bracket to detect whether the positioning component and the driving component exceed the travel range, so as to avoid failures caused by the second guide rail slider pair and the first guide rail slider pair exceeding the travel. The control component is used to control the first driving device and the second driving device, and the first driving device, the second driving device and the control component are electrically connected to the power supply to realize automatic calibration control, making the calibration test more convenient and accurate. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the overall structure of another perspective of a specific embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the overall structure after hiding the positioning component in a specific embodiment of the utility model;

[0020] Figure 4 is a schematic diagram of the overall structure of the cooperation of the fixed seat, the movable rod and the counterweight in a specific embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of the overall structure of the cooperation of the fixed seat and one counterweight in a specific embodiment of the present invention;

[0022] Figure 6 is a schematic diagram of the overall structure of the movable rod in a specific embodiment of the present invention.

[0023] In the figure: 1, fixed seat; 2, movable rod; 3, counterweight; 4, limiting rod; 5, measuring round head; 6, sliding rod; 7, limiting end; 8, mounting base; 9, first driving device; 10, first guide rail slider pair; 11, connecting piece; 12, sensor; 13, sensor baffle; 14, support foot; 15, second guide rail slider pair; 16, second driving device; 17, control component; 18, mounting bracket. Detailed Description of the Embodiment

[0024] Next, the technical solutions in this embodiment will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that in the description of the present utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] A pressure calibration structure, as Figures 1 to 6 shown, includes a fixed seat 1, a driving component that can control the uniform movement of the fixed seat 1, and a movable rod 2 slidably disposed on the fixed seat 1. The movable rod 1 includes a measuring round head 5, a sliding rod 6 slidably connected to the fixed seat 1, and a limiting end 7 for contacting and pushing the counterweight 3. The overall structure is in a "T" shape. The limiting end is located above the fixed seat 1. The sliding rod 6 is slidably connected to the fixed seat 1 through a bearing. The test round head 5 is located below the fixed seat 1. The test round head 5 can contact the touch screen, and the contact position is a point, which can more accurately contact the test position of the touch screen. The size of the limiting end 7 is wider than that of the sliding rod 6. The limiting end 7 can also be used as a counterweight to control the weight of the entire movable rod 2. The movable rod 2 is vertically arranged and can slide in the vertical direction. In the case of being affected by gravity and having no downward force, the lower surface of the limiting end 7 contacts the surface of the fixed seat 1. The limiting end 7 can limit the sliding range of the movable rod 2 and prevent it from falling off the fixed seat 1.

[0028] Above the fixed seat 1, there are three counterweights 3. The three counterweights 3 can be set to different weights. Their upper and lower end faces are parallel to the upper surface of the limit end 7, and their centers of gravity are all on the vertical line where the end point of the test round head 5 is located, so as to avoid the tilting of the movable rod 2 caused by uneven force. For example, in linear value measurement, the counterweights can be set to 1N, 2N, and 2N, and the movable rod 2 including the limit end 7 can be 2N as a whole. Each counterweight 3 is slidably connected to the fixed seat 1 through two symmetrically arranged sliding rods. Each counterweight 3 is arranged in sequence from bottom to top along the movement direction of the movable rod 2, and the area of each counterweight 3 increases in sequence from bottom to top. Ensure that when the lower counterweight 3 moves upward under the action of the movable rod 2, it can contact and sequentially push the counterweight 3 above it. The driving assembly controls the movement directions of the fixed seat 1, the movable rod 2, and the sliding direction of each counterweight 3 to be the same, all in the vertical direction. Thus, after the fixed seat 1 moves downward, when the movable rod 2 contacts the lower test piece and moves upward relative to the fixed seat 1, at this time, the counterweight 3 remains stationary relative to the fixed seat 1. Thus, after the movable rod 2 moves upward to different heights and sequentially pushes the counterweight 3, multiple counterweights 3 are stacked, providing four force value gears downward, which are 2N, 3N, 5N, and 7N respectively, meeting the calibration of linear values and the tests with different force requirements. Without changing the gravity of the counterweight 3, different gears of pressure can be applied to the touch screen for testing, and through the movement distance of the movable rod 2, that is, after moving to a certain distance, the applied pressure value increases according to the gear, and there is no pressure change during this period, making the applied pressure stable, without having to move little by little to ensure the accuracy of the pressure, so as to improve the test efficiency.

[0029] Between each counterweight 3 and the fixed seat 1, there are two limit rods 4, and the two limit rods 4 are at the diagonal corners of the corresponding counterweight 3. The two limit rods 4 and the two sliding rods prevent the counterweight 3 from tilting and deforming. Each limit rod 4 is slidably connected to the corresponding counterweight 3. The height of the limit rod 4 corresponding to the counterweight 3 from bottom to top increases in sequence. According to the movement distance required for each force value gear, the height of each limit rod 4 from the fixed seat 1 is set. Each counterweight 3 is respectively placed above the corresponding limit rod 4, so as to realize different initial heights of different counterweights 3. According to the position of the counterweight 3, it is avoided that the configuration block 3 contacts the adjacent counterweight 3 under the influence of external force, ensuring that all counterweights 3 can be sequentially contacted after being pushed by the movable rod 2, so as to ensure that different gears of pressure can be applied to the touch screen below the movable rod 2.

[0030] In this embodiment, the driving assembly includes a mounting base 8, a first driving device 9, a guide rail, a lead screw nut pair, and a first guide rail slider pair 10. The first driving device 9 and the first guide rail slider pair 10 are respectively mounted on the mounting base 8. The output end of the first driving device 9 is fixedly connected to the lead screw in the lead screw nut pair through a coupling. The first driving device 9 can be a servo motor. The nut in the lead screw nut pair is slidably connected to the slider and the guide rail in the first guide rail slider pair 10, and a connecting member 11 is fixedly connected to the slider in the first guide rail slider pair 10. The connecting member 11 is fixedly connected to the fixed seat 1. Since the fixed seat 1 is relatively fixed to the slider in the first guide rail slider pair 10, the fixed seat 1 can be controlled to act by the first driving device 9. At the same time, the first guide rail slider pair 10 and the first driving device 9 are vertically arranged on the mounting base 8, so that the fixed seat 1 can move in the vertical direction, so that the movable rod 2 and each counterweight 3 fall under the action of gravity and respectively contact the upper end surfaces of the fixed seat 1 and the corresponding limiting rod 4.

[0031] The first driving device 9 is used to drive the fixed seat 1 to act or lock, so that after the movable rod 2 contacts the touch screen, the fixed seat 1 can be controlled to move at a constant speed, avoiding the influence of acceleration on the pressure of the calibration test. After the calibration measurement is completed, reverse driving can be used for resetting.

[0032] This embodiment further includes a positioning assembly and a control assembly. The driving assembly is mounted on the positioning assembly, and the positioning assembly controls the driving assembly to act on the horizontal plane. The positioning assembly includes a mounting bracket 18, two telescopically adjustable support feet 14, a second guide rail slider pair 15 for fixing the mounting base 8, and a second driving device 16 for driving the slider in the second guide rail slider pair 15 to act. The second driving device 16 and the second guide rail slider pair 15 are both arranged on the mounting bracket 18. The second driving device 16 can be a servo motor. The slider in the second guide rail slider pair 15 is fixedly connected to the mounting base 8. The output end of the second driving device 16 is fixedly connected to a lead screw nut pair through a coupling. The nut in the lead screw nut pair and the slider in the second guide rail slider pair 15 are respectively fixedly connected to the mounting base 8 in the driving assembly. By controlling the action of the second driving device 16, the horizontal position of the mounting base 8 can be adjusted to adjust the positions of the fixed seat 1 and the movable rod 2, so as to realize the detection of different positions of the touch screen. The support feet 14 are provided with through holes and can be fixed to the detection platform through bolts, avoiding the shaking of the fixed seat 1 and keeping the movable rod 2 vertical, so as to maintain smooth sliding and avoid the influence of resistance.

[0033] The connecting member 11 is provided with a control component 17. The control component 17 is electrically connected to the first driving device 9, the second driving device 16, and two sensors 12. The control component 17 is used to control the first driving device 9 and the second driving device 16 to achieve automatic calibration control, making the calibration test more convenient and accurate. In addition, two sensors 12 are provided on the mounting seat 8, and a sensor baffle 13 for assisting the detection of the sensors 12 is provided on the connecting member 11. The sensors 12 are used to prompt the position of the slider in the second guide rail slider pair 15 to avoid damage caused by overshooting.

[0034] Specifically, when the touch screen needs to perform pressure calibration or linear value test, the device is placed vertically, and the support feet 14 are fixed by bolts. First, the device is calibrated. The pressure sensor is placed under the movable rod 2. Then, the first driving device 9 is controlled to drive the fixed seat 1 to move downward evenly, so that the measuring round head 5 contacts the pressure sensor. After the movable rod 2 contacts the zero to three counterweights 3 and moves, the value of the pressure sensor is recorded, which is the value of the four pressure levels. The weight of the counterweight 3 can be changed according to the required pressure to eliminate the influence of the resistance of each counterweight 3 and the sliding of the movable rod 1. After resetting the fixed seat 1, then the positioning component is used to move the movable rod 2 above the touch screen to be measured. The first driving device 9 is controlled to drive the fixed seat 1 to move downward evenly, so that the measuring round head 5 contacts the position to be detected on the touch screen. According to the required pressure and the distance required to move for each pressure level, continue to move evenly for the corresponding distance and then reset, and the pressure calibration of the touch screen can be achieved. Since the heights of different pressure levels are different and the pressure on the lower part remains unchanged before contacting the next counterweight 3, the pressure value measured by the touch screen is more stable and the efficiency is higher.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the premise that those skilled in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

Claims

1. A pressure calibration structure, comprising a fixing seat (1), characterized in that: It also comprises a driving component capable of controlling the fixed seat (1) to move at a uniform speed and a movable rod (2) slidably arranged on the fixed seat (1); a plurality of counterweight blocks (3) are arranged on the fixed seat (1); each of the counterweight blocks (3) slides relative to the fixed seat (1); each of the counterweight blocks (3) is arranged at intervals in a graded manner in the vertical direction; the movement directions of the fixed seat (1), the movable rod (2) and each of the counterweight blocks (3) are all in the vertical direction; and the movable rod (2) can push each of the counterweight blocks (3) to move in sequence.

2. A pressure calibration structure according to claim 1, characterized in that: A plurality of limit rods (4) of different heights are arranged above the fixed seat (1), each of the limit rods (4) is fixedly connected to the fixed seat (1), and each level of the counterweight block (3) is correspondingly slidably connected to the limit rod (4).

3. A pressure calibration structure according to claim 1, characterized in that: The movable rod (1) comprises a measuring round head (5), a sliding rod (6) slidably connected to the fixed seat (1), and a limiting end (7) for contacting and pushing the counterweight (3); the size of the limiting end (7) is wider than the size of the sliding rod (6).

4. A pressure calibration structure according to claim 1, characterized in that: The driving assembly comprises a mounting seat (8), a first driving device (9), and a first guide rail slider pair (10) fixedly connected to an output end of the first driving device (9); the first driving device (9) and the first guide rail slider pair (10) are both arranged on the mounting seat (8); and a slider in the first guide rail slider pair (10) is fixedly connected to the fixed seat (1) by means of a connecting piece (11).

5. A pressure calibration structure according to claim 4, characterized in that: The invention also comprises a positioning assembly for controlling the movement or locking of the driving assembly on a horizontal plane, wherein the driving assembly is arranged on the positioning assembly, and the positioning assembly comprises a mounting bracket (18), a telescopically adjustable support foot (14), a second guide rail slider pair (15) for fixing and driving the driving assembly, and a second driving device (16) for driving the slider in the second guide rail slider pair (15) to move, wherein the second driving device (16) and the second guide rail slider pair (15) are both arranged on the mounting bracket (18).

6. A pressure calibration structure according to claim 5, characterized in that: The mounting seat (8) and the mounting bracket (18) are each provided with two sensors (12), and the connecting member (11) and the mounting seat (8) are each provided with a sensor baffle (13) for assisting the sensors (12) in detecting.

7. A pressure calibration structure according to claim 6, characterized in that: It also includes a control component, wherein the control component (17) is arranged on the connecting member (11), and the first drive device (9), the second drive device (16) and the four sensors (12) are all electrically connected to the control component (17).

Images