A folding screen mute test device

Abstract

The application discloses a kind of folding screen mute test device, including mute shielding box, the mute shielding box includes a switch door, mute shielding box is equipped with: suspension mechanism, for suspending and fixing the folding screen to be measured;Folding mechanism, for driving the folding screen to be measured to fold along rotating hinge;Noise detection sensor, for monitoring and collecting the noise generated in the folding process of the folding screen to be measured, and outputting noise as electrical signal;Pressure detection sensor, the input end of the pressure detection sensor is in contact with the outer edge of the folding screen to be measured, for monitoring and collecting the change of torque when rotating hinge of the folding screen to be measured, and outputting pressure as electrical signal.The external environmental noise and vibration are effectively isolated by mute shielding box to interfere with the test process, and simultaneously, the torque change of hinge is monitored by pressure detection sensor, so that noise and mechanical performance data can be synchronously collected in the same pure space, to provide reliable and consistent test conditions for the correlation between wear state and abnormal sound of hinge.

Description

Technical Field

[0001] This utility model relates to the field of noise testing technology, and in particular to a foldable screen noise testing device. Background Technology

[0002] As automotive intelligence continues to advance, in-vehicle central control screens are evolving towards larger sizes and foldable designs to balance display area and space utilization. These foldable screens undergo tens or even hundreds of thousands of repeated opening and closing cycles throughout their lifespan. The durability and stability of their hinge structure, as well as the noise level during operation, directly impact the overall vehicle quality and user experience. Therefore, precise, reliable, and repeatable noise and performance testing of in-vehicle foldable screens is crucial during the research and development and production phases.

[0003] Currently, testing this type of product typically faces the following technical challenges: 1. Conventional testing workshops or laboratories have a lot of environmental noise. This noise will seriously interfere with the capture and measurement of the subtle friction sounds and abnormal noises generated by the folding screen mechanism itself, resulting in distorted test data that cannot truly reflect the noise level of the product.

[0004] 2. Existing testing methods are often fragmented, requiring different equipment and manual operation to measure parameters such as noise, angle, and pressure. This approach is not only inefficient but also makes it difficult to ensure consistency of test conditions (such as folding speed and angle) each time, introducing human error and affecting the accuracy and comparability of test results.

[0005] 3. Existing testing methods typically measure and analyze parameters such as noise and torque / pressure independently, making it difficult to establish a direct, quantitative correlation between hinge wear and abnormal noise. This makes it impossible to effectively warn of potential failures caused by component wear during product testing, and also fails to provide accurate data feedback for the durability design and optimization of hinge structures. Utility Model Content

[0006] In view of this, the present invention provides a precise automated folding screen noise testing device, which can provide a standardized noise testing environment and simultaneously achieve accurate detection of multiple parameters such as noise, rotation angle, hinge pressure, and anti-pinch function of the folding screen, thereby providing reliable data support for product quality control and design optimization.

[0007] A foldable screen noise testing device includes a noise shielding box, the noise shielding box having a switchable door, and the noise shielding box containing: Suspension mechanism, used to suspend and fix the folding screen under test; Folding mechanism, used to drive the folding screen under test to fold along the rotating hinge; A noise detection sensor is used to monitor and collect the noise generated during the folding process of the foldable screen under test, and output the noise as an electrical signal. A pressure detection sensor is provided, the input end of which contacts the outer edge of the folding screen under test. The sensor is used to monitor and collect the change in torque when the hinge of the folding screen under test rotates, and outputs the pressure as an electrical signal.

[0008] Furthermore, the suspension mechanism includes a rotating arm base fixedly installed inside a soundproof shielding box, a rotating arm rotatably connected to the rotating arm base, and a test fixture fixedly connected to the rotating arm. The test fixture is used to fix and install the folding screen to be tested.

[0009] Furthermore, the rotating arm is also fixedly connected to a noise sensor bracket for fixing and installing the noise detection sensor.

[0010] Furthermore, there are at least two noise detection sensors, arranged along the axis of the rotating hinge of the folding screen under test.

[0011] Furthermore, the folding mechanism is disposed inside the test fixture, and the output end of the folding mechanism is connected to the rotating hinge of the folding screen under test.

[0012] Furthermore, the enclosure of the silent shielding box is made of at least one of the following materials: high-density sound insulation board, sound insulation felt, sound-absorbing cotton, sound insulation glass, and sound insulation coating.

[0013] Furthermore, a vibration damper is provided at the bottom of the silent shielding box.

[0014] Furthermore, the vibration dampers consist of four units, all horizontally placed on the same fixed plane and respectively located at the four bottom corners of the silent shielding box.

[0015] Furthermore, a pressure sensor bracket is fixedly installed inside the silent shielding box. The pressure sensor bracket has an arc-shaped slide rail, and the pressure detection sensor has a sliding shaft, which is coupled to the arc-shaped slide rail.

[0016] By integrating a soundproof enclosure, suspension mechanism, folding mechanism, noise detection sensor, and pressure detection sensor, a highly integrated and controlled environment can be provided for the silent testing of automotive folding screens. The soundproof enclosure effectively isolates external environmental noise and vibration from the testing process. Simultaneously, the coordination between the suspension and folding mechanisms simulates real folding motion, while the pressure detection sensor synchronously monitors the torque changes of the hinge. This allows noise and mechanical performance data to be collected simultaneously in the same clean space, providing reliable and consistent testing conditions for comprehensive analysis of the hinge's wear condition and its correlation with abnormal noise. Attached Figure Description

[0017] Figure 1 This is a perspective view of an embodiment of the foldable screen silent testing device of this utility model.

[0018] Figure 2 for Figure 1 A 3D view of the interior of the silent test device for a foldable screen.

[0019] Figure 3 for Figure 1 A 3D view of the pressure detection sensor in the silent testing device for a foldable screen.

[0020] Explanation of reference numerals in the attached figures: 1. Silent shielding box; 2. Opening and closing door; 3. Rotating arm base; 4. Rotating arm; 5. Folding screen under test; 6. Test fixture; 7. Noise sensor bracket; 8. Noise detection sensor; 9. Pressure sensor bracket; 10. Pressure detection sensor; 11. Arc-shaped slide; 12. Fixing part; 13. Rotating part; 14. Rotating shaft; 15. Sensor head; 16. Sliding shaft; 17. Vibration damper. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", 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 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. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 and Figure 2As shown in the figure, a folding screen noise testing device according to an embodiment of the present invention includes a noise shielding box 1, the noise shielding box 1 includes a switch door 2, and a rotating arm base 3 is fixedly installed inside the noise shielding box 1. The rotating arm base 3 is used to install and connect a rotating arm 4. The rotating arm 4 is approximately "L" shaped and can rotate horizontally around the rotating arm base 3 so that the end of the rotating arm 4 extends out or retracts into the noise shielding box 1, which facilitates the installation or removal of the folding screen 5 to be tested by the staff.

[0025] The end of the rotating arm 4 is fixedly connected to a test fixture 6, which is used to fix and install the foldable screen 5 under test. In this embodiment, the test fixture 6 is an inverted groove, and the base of the foldable screen 5 under test is inserted into the groove, so that the display screen hangs downward. The end of the rotating arm 4 is also fixedly connected to a noise sensor bracket 7, which is used to fix and install the noise detection sensor 8. The noise detection sensor is used to monitor and collect the noise generated during the folding process of the foldable screen under test. The noise sound wave is transmitted through the vibration of the electret film in the noise sensor, causing a change in the capacitance inside the sensor, thereby converting the noise into a corresponding small voltage and outputting it to the test display screen. The noise sensor bracket 7 is parallel to the test fixture 6, so that the noise monitoring sensor 8 is directly facing the rotating hinge of the foldable screen under test.

[0026] The number of noise detection sensors 8 is 2, which are arranged along the axis of the rotating hinge of the folding screen under test. The two noise monitoring sensors 8 are installed side by side and symmetrically above the rotating hinge of the folding screen, so that during the test, the usage status of the left and right hinges of the folding screen under test can be accurately judged by the difference in data collected by the two noise monitoring sensors 8 respectively.

[0027] The test fixture 6 is equipped with a folding mechanism, including a high-precision servo motor. The output end of the high-precision servo motor is connected to the rotating hinge of the folding screen under test, so that the folding speed and angle of the folding screen under test can be precisely adjusted to simulate the real user's folding action.

[0028] Once the rotating arm 4 is in place, the display screen 5 under test is positioned directly above the pressure sensor bracket 9 fixedly mounted on the bottom of the silent shielding box 1. A pressure detection sensor 10 is fixedly mounted on the pressure sensor bracket 9. The input end of the pressure detection sensor 10 contacts the outer edge of the folding screen 5 under test, and is used to monitor and collect changes in torque during hinge rotation of the folding screen, identify abnormal resistance caused by wear, and output the pressure as an electrical signal.

[0029] like Figure 3As shown, in this embodiment, the pressure sensor bracket 9 has an arc-shaped slide rail 11; the pressure detection sensor 10 includes a fixed part 12 and a rotating part 13. The fixed part 12 is connected to the rotating part 13 via a rotating shaft 14. The top of the rotating part 13 is provided with a sensing head 15, and one side of the rotating part 14 is provided with a sliding shaft 16. The sliding shaft 16 is coupled to the arc-shaped slide rail 11. In actual use, the position and orientation of the sensing head 15 can be adjusted in real time through the rotating shaft 14 to ensure that the sensing head 15 remains in contact with the folding screen 5 under test, and to avoid the folding screen 5 under test applying excessive pressure to the sensing head 15 and causing damage.

[0030] The silent shielding box 1 has a layered structure, including high-density sound insulation board, sound insulation felt, sound-absorbing cotton, sound insulation glass and sound insulation coating, which effectively absorbs and reflects sound waves, reduces noise transmission, and ensures a quiet environment inside the box.

[0031] The bottom of the silent shielding box 1 is equipped with vibration isolators 17. Specifically, there are four vibration isolators 17, all horizontally placed on the same fixed plane and respectively located at the four corners of the bottom of the silent shielding box 1. The vibration isolators 17 convert mechanical vibration energy into heat energy or other forms of energy, thereby reducing the amplitude and intensity of vibration of the silent shielding box 1, achieving the purpose of vibration reduction or energy dissipation, and avoiding interference with test data.

[0032] The foldable screen noise testing device of this embodiment includes the following specific steps when in use: S1. The door 2 opens automatically, the rotating arm 4 rotates around the base 3 of the rotating arm, and the test fixture 6 is sent to the outside of the silent shielding box 1. The staff will then snap the folding screen 5 to be tested downwards and fix it in the groove of the test fixture 6. S2. Rotate the rotating arm 4 around the rotating arm base 3 to send the test fixture 6 into the silent shielding box 1 and place it in place. The door 2 closes automatically. The pressure detection sensor 10 adjusts the position of the sensing head 15 to contact the outer edge of the folding screen 5 to be tested. S3. The high-precision servo motor of the folding mechanism drives the folding screen 5 under test to fold repeatedly. At the same time, the noise detection sensor 8 and the pressure detection sensor 10 collect the corresponding data in real time and output the noise and pressure data as electrical signals. S4. After the test is completed, the door 2 opens automatically, and the rotating arm 4 sends out the folding screen 5 to be tested.

[0033] In summary, this utility model has the following significant advantages: 1. By adopting a multi-layered composite structure for the silent shielding box and a vibration isolator at the bottom, the interference of external environmental noise and mechanical vibration on the testing process is effectively isolated, creating a pure acoustic environment for capturing the subtle friction sounds and abnormal noises of the folding screen hinge, thus fundamentally ensuring the accuracy and authenticity of the noise detection data.

[0034] 2. The device integrates a rotating arm and folding mechanism driven by a high-precision servo motor, capable of automatically and accurately simulating user folding actions (speed and angle adjustable). Combined with an automatic opening and closing door and a fixing platform, it achieves automatic sample loading, unloading, and positioning, integrating the detection of multiple parameters such as noise, angle, and pressure into one unit. This not only significantly improves testing efficiency but, more importantly, eliminates errors introduced by human operation, ensuring a high degree of consistency in testing conditions for each test, resulting in highly comparable and reliable test results.

[0035] 3. By synchronously and in real-time collecting data such as noise, hinge torque / pressure, and folding angle during the folding process, a direct and quantitative correlation can be established between the mechanical performance of the hinge (such as changes in resistance due to wear) and its acoustic performance (noise generation). This allows the device to not only effectively assess the current noise level of the product but also provide early warnings of potential faults (such as the risk of abnormal noise due to wear), offering precise data feedback for the durability design, process optimization, and quality control of the hinge structure.

[0036] The above embodiments describe the technical principles of this utility model. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A foldable screen noise testing device, characterized in that: The system includes a soundproof shielding box, which has a switchable door, and the soundproof shielding box contains: Suspension mechanism, used to suspend and fix the folding screen under test; Folding mechanism, used to drive the folding screen under test to fold along the rotating hinge; A noise detection sensor is used to monitor and collect the noise generated during the folding process of the foldable screen under test, and output the noise as an electrical signal. A pressure detection sensor is provided, the input end of which contacts the outer edge of the folding screen under test. The sensor is used to monitor and collect the change in torque when the hinge of the folding screen under test rotates, and outputs the pressure as an electrical signal.

2. The foldable screen silent testing device according to claim 1, characterized in that: The suspension mechanism includes a rotating arm base fixedly installed inside a soundproof box, a rotating arm rotatably connected to the rotating arm base, and a test fixture fixedly connected to the rotating arm. The test fixture is used to fix and install the folding screen under test.

3. The foldable screen silent testing device according to claim 2, characterized in that: The rotating arm is also fixedly connected to a noise sensor bracket for fixing and installing the noise detection sensor.

4. The foldable screen silent testing device according to claim 3, characterized in that: There are at least two noise detection sensors, arranged along the axis of the rotating hinge of the folding screen under test.

5. The foldable screen silent testing device according to claim 2, characterized in that: The folding mechanism is located inside the test fixture, and the output end of the folding mechanism is connected to the rotating hinge of the folding screen under test.

6. The foldable screen silent testing device according to claim 1, characterized in that: The enclosure of the silent shielding box is made of at least one of the following materials: high-density sound insulation board, sound insulation felt, sound-absorbing cotton, sound insulation glass, and sound insulation coating.

7. The foldable screen silent testing device according to claim 1, characterized in that: The bottom of the silent shielding box is equipped with a vibration damper.

8. The foldable screen silent testing device according to claim 7, characterized in that: The vibration dampers consist of four units, all placed horizontally on the same fixed plane and positioned at the four bottom corners of the silent shielding box.

9. The foldable screen silent testing device according to claim 1, characterized in that: A pressure sensor bracket is fixedly installed inside the silent shielding box. An arc-shaped slide is provided on the pressure sensor bracket. A sliding shaft is provided on the pressure detection sensor. The sliding shaft is coupled to the arc-shaped slide.

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