A device and method for detecting multi-point pressing of a car navigation screen

Abstract

This invention relates to the field of pressure detection technology, specifically to a multi-point pressure detection device and method for vehicle navigation screens, comprising a detection platform, a pressure execution mechanism, a random drive mechanism, and a pressure drive mechanism. The pressure execution mechanism includes a main shaft, multiple contact assemblies, and a range adjustment assembly. The multiple contact assemblies are mounted on the main shaft, and the range adjustment assembly limits the axial coverage range of the contact assemblies. The random drive mechanism includes a power assembly and a linkage damping assembly. The power assembly provides power for the rotation of the main shaft, and the linkage damping assembly transmits the rotational power and decelerates and brakes the inertial rotation of the main shaft after the power is removed. The pressure drive mechanism includes a translation structure and a pressing structure. Through the combination of the power assembly, the linkage damping assembly, and the multi-phase contact assemblies, multi-point random pressure can be achieved without relying on a preset program, thus realizing a programmable, non-preset trajectory multi-point pressure detection.

Description

Technical Field

[0001] This invention relates to the field of pressure detection technology, specifically to a multi-point pressure detection device for an in-vehicle navigation screen, and also to a multi-point pressure detection method for an in-vehicle navigation screen. Background Technology

[0002] As a core component of in-vehicle interaction, the pressure resistance of the in-vehicle navigation screen directly affects the user experience and service life. Therefore, it is necessary to conduct comprehensive pressure tests during the production process to simulate random touch force scenarios in actual use and ensure that the screen does not crack or display abnormalities when subjected to external pressure.

[0003] Patent CN119757053B discloses a screen testing device and method for display production. The device mainly relies on a servo drive structure controlled by a preset program to drive a single or fixedly arranged pressing head to move along a preset trajectory. The testing is completed by setting fixed pressing points, pressing sequence and pressing force. The working process is as follows: after fixing the display screen, the electronic control system retrieves the preset testing program and drives the pressing structure to complete the pressing action at designated points on the surface of the display screen in sequence. At the same time, the pressing parameters are fed back by the sensor to realize the pressing performance test of the display screen.

[0004] Although the above solution automates the display screen pressure detection through electronic control program, it still has the following problems: the detection points, pressing trajectory, and action sequence are all preset by the electronic control program. The pressing head can only complete the pressing at the preset points along a fixed path. However, in actual vehicle use scenarios, user touch operations are not fixed, touch points are randomly distributed, and pressing actions have no predetermined order. This solution cannot reproduce this real random touch force scenario. The detection only covers a limited number of fixed points, making it difficult to detect the pressure resistance defects in non-preset areas of the screen. As a result, the detection results have a very low degree of consistency with actual use conditions and cannot truly reflect the actual pressure resistance performance of the screen. Summary of the Invention

[0005] To address the aforementioned issues, a multi-point press detection device for in-vehicle navigation screens is provided. Through the combination of a power component, a linkage damping component, and a multi-phase contact component, it achieves multi-point random presses without relying on preset programs or preset trajectories.

[0006] To address the problems of existing technologies, this invention provides a multi-point press detection device for an in-vehicle navigation screen, comprising a detection platform, a press execution mechanism, a random drive mechanism, and a press drive mechanism. The press execution mechanism includes a main shaft, multiple contact assemblies, and a range adjustment assembly. The multiple contact assemblies are arranged along the axial direction of the main shaft and face multiple directions at different circumferential angles. The range adjustment assembly is used to limit the axial coverage range of the contact assemblies to adapt to the display area of ​​the in-vehicle navigation screen. The random drive mechanism is located at one end of the main shaft and includes a power assembly and a linkage damping assembly. The power assembly provides power for the rotation of the main shaft, and the linkage damping assembly transmits the rotational power and decelerates and brakes the inertial rotation of the main shaft after the power is removed, so that at least one contact assembly is perpendicularly facing the in-vehicle navigation screen when the main shaft stops. The press drive mechanism includes a translation structure for driving the press execution mechanism to move horizontally and a pressing structure for driving the press execution mechanism to move vertically.

[0007] Preferably, the plurality of contact assemblies are spirally and equidistantly distributed along the main axis, and adjacent contact assemblies are circumferentially phase-staggered.

[0008] Preferably, the contact assembly includes an annular block, a resilient contact, and a locking bolt; the annular block is slidably sleeved on the main shaft; the resilient contact is mounted on the annular block; the locking bolt passes through and is threadedly connected to the annular block, with its end abutting against the main shaft, for fixing the annular block and the main shaft together.

[0009] Preferably, the main shaft has multiple sliding grooves, which are arranged circumferentially around the axis of the main shaft at equal angles. The inner side of the annular block is provided with a slider that matches the sliding groove, and the slider slides within the sliding groove.

[0010] Preferably, the outer wall surface of the spindle is provided with external threads, and the range adjustment assembly includes two adjustment sleeves and a plurality of first springs; the two adjustment sleeves are respectively disposed at both ends of the spindle, and the adjustment sleeves are threadedly engaged with the spindle; the first springs are disposed between two adjacent contact assemblies.

[0011] Preferably, the linkage damping assembly includes a connecting block, multiple damping arms, and a linkage component; the connecting block is rotatably connected to the main shaft via bearings; the multiple damping arms are radially arranged at equal intervals around the center of the connecting block; the linkage component is used to drive the connection between the connecting block and the main shaft to realize the power transmission between the connecting block and the main shaft.

[0012] Preferably, the linkage component includes a one-way transmission disk and multiple transmission arms; the one-way transmission disk is coaxially and fixedly connected to the main shaft; the multiple transmission arms are correspondingly arranged on the multiple damping arms, and the free ends of the multiple transmission arms abut against the one-way transmission disk.

[0013] Preferably, the damping arm includes a guide rod and a second spring; the guide rod is connected to the connecting block radially along the connecting block, and the transmission arm is slidably sleeved with the guide rod; the second spring is used to provide a force to the transmission arm toward the connecting block.

[0014] Preferably, the linkage damping assembly further includes an angle fixing assembly, which is used to cooperate with the damping arm to position the main shaft and drive a portion of the contact assembly to face the screen vertically.

[0015] A method for detecting multi-point presses on a vehicle navigation screen, applied to a multi-point press detection device for a vehicle navigation screen, includes the following steps:

[0016] S1. Horizontally fix the vehicle navigation screen on the testing platform;

[0017] S2, The translation structure drives the pressing actuator and the random drive mechanism to move above the vehicle navigation screen;

[0018] S3. The range adjustment component adjusts the axial coverage range of the plurality of contact components;

[0019] S4. The power component drives the main shaft to rotate through the linkage damping component. Then the power component removes the power, and the main shaft continues to rotate due to inertia, and stops rotating under the deceleration and braking action of the linkage damping component.

[0020] S5. A portion of the contact assembly on the main shaft is randomly positioned vertically toward the vehicle navigation screen;

[0021] S6. The pressing structure drives the main shaft and the contact assembly to move vertically toward the vehicle navigation screen.

[0022] The advantages of this invention application compared to the prior art are:

[0023] 1. This invention application sets up a detection platform, a pressing actuator, a random drive mechanism, and a pressing drive mechanism. After the detection platform is horizontally fixed to the vehicle navigation screen, the translation structure drives the pressing actuator and the random drive mechanism to move synchronously to the top of the screen, so that the main shaft is parallel and aligned with the display area. The range adjustment component adjusts the distribution boundary of the contact components along the main shaft axis, so that they all fall into the effective display area of ​​the screen to complete the positioning. The power component drives all contact components to rotate synchronously through the main shaft. After the main shaft speed stabilizes, the drive motor removes the power. When the main shaft rotates inertially, the linkage damping component applies deceleration resistance to make it stop smoothly. At this time, at least one contact component is vertically facing the screen. Then, the pressing structure drives the main shaft and the vertically facing contact component to move vertically downward to complete the pressing detection. After a single detection, the pressing structure resets. The translation structure can switch the detection area to repeat the process. Through the combination of the power component, the linkage damping component, and the multi-phase contact components, multi-point random pressing without relying on a preset program can be achieved without programming or preset trajectory.

[0024] 2. In this invention, multiple contact components are arranged spirally and equidistantly along the main shaft axis, with adjacent components maintaining a preset circumferential phase difference. When the power component drives the main shaft to rotate through the linkage damping component, all contact components rotate synchronously circumferentially with the main shaft. Due to the different initial circumferential phases, the orientation of each contact component changes differentially as the main shaft rotates. After the power component is removed, the main shaft rotates inertially, and the linkage damping component applies a deceleration braking force to bring it to a smooth stop. At this time, only some contact components whose circumferential phase matches the vertical direction of the screen are perpendicular to the screen, while the rest are oriented to the side due to phase deviation and cannot contact the screen. This achieves the effect that only some contact components act on the screen during a single press, making the press point naturally random.

[0025] 3. This invention application includes an annular block, elastic contacts, and locking bolts. The axial position of the annular block is adjusted according to the size of the vehicle navigation screen display area, ensuring that the overall coverage area of ​​the elastic contacts on the annular block matches the screen display area. The elastic contacts, acting as the pressing actuator, are fixed to the side of the annular block facing the screen. After the annular block is positioned correctly, the locking bolt is inserted and screwed onto the annular block's threads. Tightening the bolt causes its end to press against the outer wall of the main shaft, locking the annular block to the main shaft through compressive force. This prevents axial displacement of the annular block during main shaft rotation and pressing detection, ensuring the stability of the contact assembly. Through the sliding cooperation between the annular block and the main shaft, the axial position of each contact assembly can be adjusted individually, thereby adapting to display areas of different sized vehicle navigation screens, demonstrating strong adaptability. Attached Figure Description

[0026] Figure 1 This is a perspective view of a multi-point pressure detection device for an in-vehicle navigation screen according to the present invention.

[0027] Figure 2This is a perspective view of the pressing actuator, random drive mechanism, and pressing drive mechanism in a multi-point pressing detection device for a vehicle navigation screen according to this invention application.

[0028] Figure 3 This is a perspective view of the main shaft, contact assembly, range adjustment assembly, power assembly, and linkage damping assembly in a multi-point press detection device for an in-vehicle navigation screen according to the present invention application.

[0029] Figure 4 This is a perspective view of the main shaft and contact assembly in a multi-point press detection device for an in-vehicle navigation screen according to the present invention application.

[0030] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0031] Figure 6 This is a perspective view of the main shaft and range adjustment component in a multi-point press detection device for an in-vehicle navigation screen according to the present invention.

[0032] Figure 7 This is a perspective view of the main shaft, power component, connecting block, damping arm, linkage component, and angle fixing component in a multi-point press detection device for a vehicle navigation screen according to the present invention application.

[0033] Figure 8 This invention relates to a three-dimensional model of a connecting block, damping arm, and linkage component in a multi-point press detection device for an in-vehicle navigation screen. Figure 1 .

[0034] Figure 9 This invention relates to a three-dimensional representation of the connecting block, damping arm, and linkage component in a multi-point press detection device for an in-vehicle navigation screen. Figure 2 .

[0035] Figure 10 This is a perspective view of the connecting block, guide rod, and angle fixing component in a multi-point press detection device for an in-vehicle navigation screen according to this invention application.

[0036] The diagram is labeled as follows: 1. Testing table; 2. Pressing actuator; 21. Main shaft; 211. Slide groove; 22. Contact assembly; 221. Annular block; 2211. Slider; 222. Elastic contact; 223. Locking bolt; 23. Range adjustment assembly; 231. Adjusting sleeve; 232. First spring; 3. Random drive mechanism; 31. Power assembly; 311. Driven gear; 312. Drive gear; 313. Drive motor; 32. Linkage damping assembly; 321. Connecting block; 322. Damping arm; 3221. Guide rod; 3222. Limiting ring; 323. Linkage assembly; 3231. One-way transmission disc; 3232. Transmission arm; 324. Angle fixing assembly; 3241. Fixed claw; 3242. Linear actuator; 4. Pressing drive mechanism; 41. Translation structure; 42. Pressing structure. Detailed Implementation

[0037] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1 to 10 As shown: A multi-point press detection device for a vehicle navigation screen includes a detection platform 1, a press execution mechanism 2, a random drive mechanism 3, and a press drive mechanism 4. The press execution mechanism 2 includes a main shaft 21, multiple contact assemblies 22, and a range adjustment assembly 23. The multiple contact assemblies 22 are arranged along the axial direction of the main shaft 21, and the multiple contact assemblies 22 are oriented in multiple directions at different circumferential angles. The range adjustment assembly 23 is used to limit the axial coverage range of the contact assemblies 22 to adapt to the display area of ​​the vehicle navigation screen. The random drive mechanism 3 is arranged in the detection platform 1, a press execution mechanism 2, a random drive mechanism 3, and a press drive mechanism 4. At one end of the main shaft 21, the random drive mechanism 3 includes a power component 31 and a linkage damping component 32. The power component 31 is used to provide power for the rotation of the main shaft 21, and the linkage damping component 32 is used to transmit rotational power and decelerate and brake the inertial rotation of the main shaft 21 after the power is removed, so that when the main shaft 21 stops, at least one contact component 22 is perpendicularly facing the vehicle navigation screen; the press drive mechanism 4 includes a translation structure 41 for driving the press actuator 2 to move in the horizontal direction and a press structure 42 for driving the press actuator 2 to move in the vertical direction.

[0039] Specifically, the power assembly 31 includes a driven gear 311 and a driving gear 312. The driven gear 311 is connected to the linkage damping assembly 32, and the driving gear 312 meshes with the driven gear 311. A drive motor 313 is provided on one side of the driving gear 312.

[0040] After the vehicle navigation screen is horizontally fixed on the testing platform 1, the translation structure 41 drives the pressing actuator 2 and the random drive mechanism 3 to move synchronously to the top of the screen, so that the main shaft 21 is parallel and aligned with the screen display area. The distribution boundary of the contact assembly 22 is adjusted along the axis of the main shaft 21 by the range adjustment component 23, so that all contact assemblies 22 fall into the effective display area of ​​the vehicle navigation screen, thus completing the pre-test positioning. When the power assembly 31 is started, the drive motor 313 drives the drive gear 312 to rotate. The drive gear 312 transmits power to the driven gear 311 through meshing transmission. The driven gear 311 then transmits power to the linkage damping assembly 32. The linkage damping assembly 32 smoothly transmits the rotational power to the main shaft 21, causing the main shaft 21 to drive all the contact assemblies 22 to rotate synchronously. After the main shaft 21 speed stabilizes, the drive motor 313 removes the power, and the main shaft 21 enters the inertial rotation state. At this time, the linkage damping assembly 32 applies controllable deceleration resistance to the inertial rotation of the main shaft 21, gradually consuming the rotational kinetic energy, and finally causing the main shaft 21 to stop rotating smoothly. When it stops, at least one contact assembly 22 is perpendicular to the vehicle navigation screen due to circumferential phase matching. Subsequently, the pressing structure 42 drives the main shaft 21 and the vertically oriented contact assembly 22 to move downwards in a vertical direction, completing the multi-point random press detection of the screen. After a single detection, the pressing structure 42 resets, and the translation structure 41 can drive the pressing actuator 2 and the random drive mechanism 3 to move horizontally again, switching to other detection areas of the screen, and repeating the above process to achieve comprehensive detection. Through the combination of the power assembly 31, the linkage damping assembly 32, and the multi-phase contact assembly 22, multi-point random pressing without programming or preset trajectory is achieved without relying on a preset program.

[0041] Reference Figure 4 and Figure 5 As shown: a plurality of contact assemblies 22 are spirally and equidistantly distributed along the main axis 21, and adjacent contact assemblies 22 are circumferentially phase-shifted.

[0042] Multiple contact components 22 are arranged spirally and equidistantly along the axis of the main shaft 21, and adjacent contact components 22 maintain a preset circumferential phase difference, achieving a layout design with staggered circumferential phases. When the power component 31 drives the main shaft 21 to rotate through the linkage damping component 32, all contact components 22 rotate circumferentially synchronously with the main shaft 21. Because the initial circumferential phases of each contact component 22 are different, their orientation will continuously change differently as the main shaft 21 rotates. After the drive motor 313 removes power, the main shaft 21 continues to rotate due to inertia. The linkage damping component 32 applies deceleration braking force to the main shaft 21 and brings it to a smooth stop. When the main shaft 21 stops, only some contact components 22 whose circumferential phase matches the vertical direction of the screen will face and be perpendicular to the vehicle navigation screen. The remaining contact components 22 will face the side of the screen due to phase deviation and will not be able to contact the screen. This achieves the effect that only some contact components 22 act on the screen with a single press, making the press point naturally random.

[0043] Reference Figure 5 As shown: The contact assembly 22 includes an annular block 221, an elastic contact 222, and a locking bolt 223; the annular block 221 is slidably sleeved on the main shaft 21; the elastic contact 222 is mounted on the annular block 221; the locking bolt 223 passes through and is threadedly connected to the annular block 221, and its end abuts against the main shaft 21, for fixing the annular block 221 and the main shaft 21.

[0044] The annular block 221 of the contact assembly 22 is slidably fitted onto the outside of the main shaft 21 and can slide freely along the axial direction of the main shaft 21. The operator can adjust the axial position of each annular block 221 on the main shaft 21 according to the display area size of the vehicle navigation screen, so that the overall coverage of all elastic contacts 222 matches the screen display area. The elastic contacts 222 are fixedly installed on the side of the annular block 221 facing the screen, serving as the pressing end that directly contacts the screen. After the position of each annular block 221 is adjusted, the locking bolt 223 is inserted into the annular block 221 and screwed into the thread of the annular block 221. The locking bolt 223 is continuously tightened so that its end gradually presses against the outer wall of the main shaft 21. The clamping force between the bolt and the main shaft 21 forms a fixing effect, locking the annular block 221 to the main shaft 21, preventing the annular block 221 from axially shifting during the subsequent rotation of the main shaft 21 and pressing detection, and ensuring the stability of the contact assembly 22. By sliding the annular block 221 with the main shaft 21, the axial position of each contact assembly 22 can be adjusted individually, thereby adapting to the display area of ​​different sized in-vehicle navigation screens, with strong adaptability.

[0045] Reference Figure 5As shown: The main shaft 21 is provided with a plurality of sliding grooves 211, which are arranged circumferentially around the axis of the main shaft 21 at equal angles. The inner side of the annular block 221 is provided with a slider 2211 that is adapted to the sliding groove 211, and the slider 2211 slides within the sliding groove 211.

[0046] Multiple grooves 211 are circumferentially formed at equal angles around the axis of the main shaft 21 on its outer wall. Correspondingly, sliders 2211, matching the size and number of the grooves 211, are integrally set inside the annular block 221 of the contact assembly 22. During assembly, the annular block 221 is slidably fitted onto the main shaft 21 by the sliders 2211 engaging with the grooves 211, thus forming a precise sliding fit between the sliders 2211 and the grooves 211. When the operator pushes the annular block 221 along the axial direction of the main shaft 21 to adjust the position of the contact assembly 22, The slider 2211 slides directionally along the groove 211. The circumferential limiting function of the groove 211 strictly restricts the annular block 221 from rotating circumferentially relative to the main shaft 21, ensuring that the annular block 221 drives the elastic contact 222 to maintain a preset circumferential phase angle. Throughout the subsequent rotation of the main shaft 21, which drives the contact assembly 22 to rotate synchronously, and throughout the entire pressing and detection process, the cooperation between the slider 2211 and the groove 211 consistently constrains the circumferential freedom of the annular block 221, ensuring that the circumferential phase of each contact assembly 22 does not shift. The precise sliding cooperation between the groove 211 and the slider 2211, without affecting the free adjustment of the contact assembly 22 along the axial direction of the main shaft 21, achieves circumferential limiting of the annular block 221, effectively ensuring that the circumferential phase of each contact assembly 22 remains fixed, and preventing pressing point disorder caused by phase shift during the rotation of the main shaft 21 and the detection process.

[0047] Reference Figure 3 and Figure 6 As shown: the outer wall surface of the main shaft 21 is provided with external threads, and the range adjustment assembly 23 includes two adjustment sleeves 231 and a plurality of first springs 232; the two adjustment sleeves 231 are respectively disposed at both ends of the main shaft 21, and the adjustment sleeves 231 are threadedly engaged with the main shaft 21; the first springs 232 are disposed between two adjacent contact assemblies 22.

[0048] When it is necessary to adapt to the display area of ​​a vehicle navigation screen of different sizes, the adjusting sleeves 231 at both ends of the main shaft 21 are rotated in the forward or reverse direction. By utilizing the linear displacement characteristics of the threaded transmission, the adjusting sleeves 231 are directionally moved along the axial direction of the main shaft 21. The moving adjusting sleeves 231 will directly push the contact assembly 22 at the end to slide synchronously. During the sliding process, the contact assembly 22 will squeeze or release the adjacent first spring 232. The elastic thrust of the first spring 232 will drive the subsequent contact assembly 22 to slide in sequence, so that all contact assemblies 22 are evenly distributed on the main shaft 21, thereby achieving precise and stepless adjustment of the overall axial coverage of the contact assembly 22.

[0049] Reference Figure 3 and Figure 7 As shown: The linkage damping assembly 32 includes a connecting block 321, multiple damping arms 322, and a linkage assembly 323; the connecting block 321 is rotatably connected to the main shaft 21 via bearings; the multiple damping arms 322 are radially arranged at equal intervals around the center of the connecting block 321 on the connecting block 321; the linkage assembly 323 is used to drive the connection between the connecting block 321 and the main shaft 21 to realize the power transmission between the connecting block 321 and the main shaft 21.

[0050] When the power component 31 drives the driven gear 311 to rotate, the driven gear 311 drives the connecting block 321 to rotate synchronously and coaxially. The connecting block 321 transmits the rotational power to the main shaft 21 through the linkage component 323, thereby driving the main shaft 21 to rotate synchronously. When the driving force of the power component 31 is removed, the main shaft 21 continues to rotate due to inertia and drives the linkage component 323 to rotate. During this process, the damping arm 322 continuously acts on the linkage component 323 to generate damping resistance, which is then transmitted to the main shaft 21, forming a continuous deceleration and braking effect on the inertial rotation of the main shaft 21 until the main shaft 21 comes to a smooth stop. The bearing-type coaxial rotational connection between the connecting block 321 and the main shaft 21, combined with the transmission design of the linkage component 323, achieves smooth power transmission and ensures the synchronicity of the rotation of the main shaft 21.

[0051] Reference Figure 7 and Figure 8 As shown: The linkage component 323 includes a one-way transmission disk 3231 and a plurality of transmission arms 3232; the one-way transmission disk 3231 is coaxially and fixedly connected to the main shaft 21; the plurality of transmission arms 3232 are arranged one-to-one on the plurality of damping arms 322, and the free ends of the plurality of transmission arms 3232 abut against the one-way transmission disk 3231.

[0052] When the power assembly 31 drives the connecting block 321 to rotate, the connecting block 321 drives each damping arm 322 to rotate synchronously around the axis of the main shaft 21. The damping arm 322 then drives the transmission arm 3232 on it to rotate together. The rotating transmission arm 3232 continuously presses against the one-way transmission disk 3231 and pushes it to rotate synchronously, thereby driving the main shaft 21 to rotate through the one-way transmission disk 3231, realizing the one-way transmission of power from the connecting block 321 to the main shaft 21. When the power assembly 31 removes the driving force, the connecting block 321 and the damping arm 322... When the active rotation stops, the main shaft 21 continues to rotate due to inertia and drives the one-way transmission disk 3231 to rotate synchronously. At this time, the rotation of the one-way transmission disk 3231 reacts to the abutting transmission arm 3232. The transmission arm 3232 is kept in contact with the one-way transmission disk 3231 by the limiting action of the damping arm 322. The contact friction between the two and the resistance of the damping arm 322 work together to continuously increase the rotational resistance of the one-way transmission disk 3231 and transmit this resistance to the main shaft 21, thereby decelerating and braking the inertial rotation of the main shaft 21.

[0053] Reference Figure 7 and Figure 9 As shown: The damping arm 322 includes a guide rod 3221 and a second spring 3222; the guide rod 3221 is connected to the connecting block 321 radially along the connecting block 321, and the transmission arm 3232 is slidably sleeved with the guide rod 3221; the second spring 3222 is used to provide a force to the transmission arm 3232 toward the connecting block 321.

[0054] When the power assembly 31 drives the connecting block 321 to rotate, the guide rod 3221 rotates synchronously with the connecting block 321. The elastic force of the second spring 3222 continuously presses the transmission arm 3232 against the surface of the one-way transmission disk 3231. The rotating transmission arm 3232 pushes the one-way transmission disk 3231 to rotate synchronously through the frictional force of contact with the one-way transmission disk 3231, thereby driving the main shaft 21 to rotate, realizing stable power transmission. The elastic contact method can buffer the rigid impact during the transmission process. When the power assembly 31 removes the driving force, the main shaft 21 drives the one-way transmission disk 3231 by inertia. When 231 rotates in the reverse direction, the rotation of the one-way transmission disk 3231 will generate a reverse pushing force on the transmission arm 3232. This pushing force overcomes the elastic force of the second spring 3222, pushing the transmission arm 3232 to slide away from the connecting block 321 along the guide rod 3221 and compress the second spring 3222, so that the transmission arm 3232 and the one-way transmission disk 3231 are quickly separated, cutting off the reverse power transmission path. At the same time, the rotational resistance of the damping arm 322 is indirectly applied to the main shaft 21 through the guide rod 3221 and the second spring 3222, realizing deceleration and braking.

[0055] Reference Figure 7 and Figure 10As shown: The linkage damping component 32 also includes an angle fixing component 324, which is used to cooperate with the damping arm 322 to position the main shaft 21 and drive part of the contact component 22 to face the screen vertically.

[0056] Specifically, the angle fixing component 324 includes a fixing claw 3241 and a linear driver 3242. The fixing claw 3241 is used to fix and engage the damping arm 322, and the linear driver 3242 is used to drive the fixing claw 3241 to move to achieve engagement, fixation and separation with the damping arm 322.

[0057] When the driving force of the power component 31 is removed and the main shaft 21 comes to a stop under the deceleration and braking action of the linkage damping component 32, the linear actuator 3242 drives the fixed claw 3241 to move horizontally towards the damping arm 322, so that the fixed claw 3241 engages with the damping arm 322 at the corresponding position. The circumferential position of the fixed damping arm 322 restricts the rotation of the connecting block 321, and then the linkage component 323 locks the circumferential angle of the main shaft 21, so as to achieve precise positioning of the main shaft 21 and ensure that the upper part of the contact component 22 of the main shaft 21 is vertically facing the vehicle navigation screen. After the single press test is completed, the linear actuator 3242 drives the fixed claw 3241 to move horizontally in the opposite direction, so that the fixed claw 3241 separates from the damping arm 322, releases the position restriction on the damping arm 322, and the main shaft 21 returns to a state of free rotation, preparing for the next random rotation and positioning press. The angle fixing component 324 drives the fixing claw 3241 and the damping arm 322 to engage and disengage through the linear driver 3242. This enables precise angle locking during the inertial rotation of the spindle 21, effectively avoiding positioning deviations caused by inertia. This ensures that the contact component 22 is stably and vertically oriented towards the screen, improving the accuracy of the press detection point.

[0058] A method for detecting multi-point presses on a vehicle navigation screen, applied to a multi-point press detection device for a vehicle navigation screen, includes the following steps:

[0059] S1. Horizontally fix the vehicle navigation screen on the testing platform 1;

[0060] S2, The translation structure 41 drives the pressing actuator 2 and the random drive mechanism 3 to move above the vehicle navigation screen;

[0061] S3, the range adjustment component 23 adjusts the axial coverage range of the plurality of contact components 22;

[0062] S4. The power component 31 drives the main shaft 21 to rotate through the linkage damping component 32. Then the power component 31 removes the power, and the main shaft 21 continues to rotate due to inertia, and stops rotating under the deceleration and braking action of the linkage damping component 32.

[0063] S5. A portion of the contact assembly 22 on the main shaft 21 is randomly positioned vertically toward the vehicle navigation screen;

[0064] S6. The pressing structure 42 drives the main shaft 21 and the contact assembly 22 to move vertically toward the vehicle navigation screen.

[0065] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A device for detecting multi-point press of a car navigation screen, characterized in that, It includes a testing platform (1), a pressing actuator (2), a random drive mechanism (3), and a pressing drive mechanism (4); The pressing actuator (2) includes a main shaft (21), multiple contact assemblies (22) and a range adjustment assembly (23). The multiple contact assemblies (22) are arranged on the main shaft (21) along the axial direction of the main shaft (21), and the multiple contact assemblies (22) are oriented in multiple directions at different circumferential angles. The range adjustment assembly (23) is used to limit the axial coverage range of the contact assemblies (22) to adapt to the display area of ​​the vehicle navigation screen. The random drive mechanism (3) is disposed at one end of the main shaft (21). The random drive mechanism (3) includes a power component (31) and a linkage damping component (32). The power component (31) is used to provide power for the rotation of the main shaft (21). The linkage damping component (32) is used to transmit rotational power and decelerate and brake the inertial rotation of the main shaft (21) after the power is removed, so that when the main shaft (21) stops, at least one of the contact components (22) is perpendicular to the vehicle navigation screen. The pressing drive mechanism (4) includes a translation structure (41) for driving the pressing actuator (2) to move in the horizontal direction and a pressing structure (42) for driving the pressing actuator (2) to move in the vertical direction.

2. The device according to claim 1, wherein, Multiple contact assemblies (22) are spirally and equidistantly distributed along the main axis (21), and adjacent contact assemblies (22) are circumferentially phase-shifted.

3. The device according to claim 2, wherein, The contact assembly (22) includes an annular block (221), an elastic contact (222), and a locking bolt (223). The annular block (221) is slidably sleeved on the main shaft (21); The elastic contact (222) is mounted on the annular block (221); The locking bolt (223) passes through and is threaded to the annular block (221), and its end abuts against the main shaft (21) for fixing the annular block (221) and the main shaft (21).

4. The device according to claim 3, wherein, The main shaft (21) is provided with multiple sliding grooves (211), and the multiple sliding grooves (211) are arranged circumferentially around the axis of the main shaft (21) at equal angles. The inner side of the annular block (221) is provided with a slider (2211) that is adapted to the sliding groove (211), and the slider (2211) slides in the sliding groove (211).

5. The device according to claim 1, wherein, The outer wall surface of the main shaft (21) is provided with external threads, and the range adjustment assembly (23) includes two adjustment sleeves (231) and a plurality of first springs (232). The two adjusting sleeves (231) are respectively disposed at both ends of the main shaft (21), and the adjusting sleeves (231) are threadedly engaged with the main shaft (21); The first spring (232) is disposed between two adjacent contact assemblies (22).

6. The device according to claim 1, wherein, The linkage damping assembly (32) includes a connecting block (321), multiple damping arms (322), and a linkage assembly (323). The connecting block (321) and the main shaft (21) are rotatably connected coaxially via bearings; Multiple damping arms (322) are radially arranged at equal intervals around the center of the connecting block (321) on the connecting block (321); The linkage component (323) is used to drive the connection block (321) and the main shaft (21) to realize the power transmission between the connection block (321) and the main shaft (21).

7. The device according to claim 6, wherein, The linkage component (323) includes a one-way transmission disk (3231) and multiple transmission arms (3232). The one-way transmission disk (3231) is coaxially and fixedly connected to the main shaft (21); Multiple transmission arms (3232) are arranged one-to-one on multiple damping arms (322), and the free ends of multiple transmission arms (3232) abut against the one-way transmission disk (3231).

8. The device according to claim 7, wherein, The damping arm (322) includes a guide rod (3221) and a second spring (3222); The guide rod (3221) is radially connected to the connecting block (321), and the transmission arm (3232) is slidably sleeved with the guide rod (3221); The second spring (3222) is used to provide a force to the transmission arm (3232) toward the connecting block (321).

9. The device according to claim 6, wherein, The linkage damping assembly (32) further includes an angle fixing assembly (324), which is used to cooperate with the damping arm (322) to position the main shaft (21) and drive a portion of the contact assembly (22) to face the screen vertically.

10. A method for detecting multi-point press of a car navigation screen, applied to the multi-point press detection device of any one of claims 1-9, characterized in that, Includes the following steps: S1. Fix the vehicle navigation screen horizontally on the test platform (1); S2, The translation structure (41) drives the pressing actuator (2) and the random drive mechanism (3) to move above the vehicle navigation screen; S3, the range adjustment component (23) adjusts the axial coverage range of the plurality of contact components (22); S4. The power component (31) drives the main shaft (21) to rotate through the linkage damping component (32). Then the power component (31) removes the power, and the main shaft (21) continues to rotate due to inertia, and stops rotating under the deceleration and braking action of the linkage damping component (32). S5. Part of the contact assembly (22) on the main shaft (21) is randomly positioned vertically toward the vehicle navigation screen; S6. The pressing structure (42) drives the main shaft (21) and the contact assembly (22) to move vertically toward the vehicle navigation screen.

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