Installation structure of pupil tracking anti-fatigue driving image acquisition device

Abstract

The utility model discloses a kind of pupil tracking anti-fatigue driving image acquisition equipment's mounting structure applied to image communication field, including the mounting plate of fixedly connected with image acquisition equipment and multiple two-way fasteners for installing mounting plate in vehicle interior, two-way fastener includes outer bolt, multilateral limiting sleeve, first fastener and second fastener, a plurality of screw holes corresponding one-to-one with two-way fastener are opened on mounting plate, by adopting the first fastener and second fastener of opposite screwing direction, image acquisition equipment is installed in vehicle interior with mounting plate, then the first fastener and second fastener are connected by multilateral limiting sleeve and defined, the motion state of three is kept synchronous, the interdependence of first fastener and second fastener to each other operating state is realized, so that both are not prone to loosening condition, and then effectively improve the stability of image acquisition equipment and mounting plate.

Description

Technical Field

[0001] This utility model relates to the field of image communication, and in particular to an installation structure for a pupil tracking anti-fatigue driving image acquisition device. Background Technology

[0002] Pupil tracking technology in fatigue driving monitoring mainly provides early warnings by analyzing changes in pupil diameter and blinking characteristics. For example, when fatigued, the pupil will shrink. The system monitors changes in pupil size in real time through an infrared camera, and triggers an early warning when abnormal contraction is detected.

[0003] During long-distance driving, drivers are prone to fatigue. Eye-tracking technology can issue an alert when drivers begin to show signs of fatigue, allowing them to rest in time and reducing the risk of accidents caused by fatigue driving. With the continuous development and improvement of eye-tracking technology, its application prospects in the automotive industry are very broad. For example, Chinese patent CN210725030U discloses a car fatigue driving detection camera. It can quickly and flexibly install the camera to the drive seat through a screw-on structure and connect the camera to the on-board computer to perform real-time facial image detection of the driver, avoiding driver fatigue driving. It can also adaptively adjust the light intensity of the infrared lamp to ensure that the camera can clearly capture the driver's facial information.

[0004] In existing technologies, a common method is to use bolts to directly fix the image acquisition device inside the vehicle. Although bolts are a relatively stable connection method, they are prone to loosening after long-term use due to vehicle bumps or vibrations. This can cause the image acquisition device to become loose, resulting in blurry and unclear image data of the driver, which in turn affects the results of pupil recognition. Summary of the Invention

[0005] The core of this invention lies in using a first and a second fastener with opposite tightening directions to secure the mounting plate and the image acquisition device. The mutual constraint between the first and second fasteners on their operational states solves the problem of loosening easily in existing ordinary bolt connections under vehicle vibration and bumps. Simultaneously, the addition of an outer washer and a colored marking ring provides a visual indication of the looseness of the outer bolts.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An installation structure for a pupil-tracking anti-fatigue driving image acquisition device includes a mounting plate to which the image acquisition device is fixedly connected, and multiple bidirectional fasteners for mounting the mounting plate inside a vehicle. Each bidirectional fastener includes an outer bolt, a polygonal retaining sleeve, a first fastener, and a second fastener. The mounting plate has multiple screw holes corresponding to the bidirectional fasteners. The outer end of the first fastener is threaded to the inner surface of the screw hole. The second fastener is located inside the first fastener, with one end passing through the first fastener and threaded to the vehicle's interior trim panel. The polygonal retaining sleeve is placed inside the first fastener, with one end fitted onto the outer side of the second fastener. The outer bolt is threaded to the inside of the polygonal retaining sleeve and the second fastener. The tightening direction of the first fastener in the screw hole is opposite to the tightening direction of the second fastener inside the vehicle's interior trim panel.

[0008] Furthermore, the second fastener includes a threaded section and a polygonal end, the polygonal end being located inside the first fastener, one end of the threaded section being fixedly connected to one end of the polygonal end, and the other end of the threaded section passing through the first fastener and being threadedly connected to the vehicle interior panel.

[0009] Furthermore, the first fastener has a first polygonal limiting groove and a round hole that are interconnected. The polygonal limiting sleeve is placed inside the first polygonal limiting groove, and the outer surface of the polygonal limiting sleeve and the inner surface of the first polygonal limiting groove are matching polygonal structures. The round hole is used for the threaded section to move through.

[0010] Furthermore, the polygonal limiting sleeve has an external threaded groove and a second polygonal limiting groove that are interconnected. The polygonal end is inserted into the interior of the second polygonal limiting groove. The outer surface of the polygonal end and the inner surface of the second polygonal limiting groove are matching polygonal structures.

[0011] Furthermore, the end of the polygonal end furthest from the threaded section has an internal thread groove, and the external bolt is threaded into the interior of the external thread groove and the internal thread groove.

[0012] Furthermore, the first polygonal limiting groove is provided with an inner gasket, which is movably sleeved on the outside of the threaded section. One end face of the inner gasket is in contact with the inner wall of the first polygonal limiting groove, and the other end face is in contact with the end face of the polygonal limiting sleeve and the polygonal end.

[0013] Optionally, an outer washer is provided between the outer bolt and the mounting plate. The surface of the mounting plate is coated with multiple colored marking rings, which are located on the outside of the openings of multiple screw holes. The colored marking rings and screw holes are coaxially arranged, and the diameter of the colored marking rings is the same as the outer diameter of the outer washer.

[0014] Compared with existing technologies, the advantages of this utility model are: This solution uses a first and a second fastener with opposite screwing directions to install the mounting plate and image acquisition equipment inside the vehicle. Then, a polygonal limiting sleeve is used to connect and limit the first and second fasteners, keeping their movement synchronized. This achieves mutual constraint between the first and second fasteners on each other's operating states, making it difficult for either to loosen, thereby effectively improving the stability of the image acquisition equipment and the mounting plate. By adding external washers and colored marking rings, the loosening of external bolts can be detected in a timely manner, eliminating the need for manual inspection. Furthermore, even if personnel forget to regularly inspect the external bolts, the loosening can be detected promptly through unconscious visual observation. Attached Figure Description

[0015] Figure 1 This is a perspective view of the first embodiment of the present invention after installation; Figure 2 Partial disassembly three-dimensional representation of the first embodiment of this utility model Figure 1 ; Figure 3 Partial disassembly three-dimensional representation of the first embodiment of this utility model Figure 2 ; Figure 4 This is a side view of the first embodiment of the present invention after installation; Figure 5 This is a schematic diagram of the side structure during the installation process of the first embodiment of this utility model. Figure 1 ; Figure 6 This is a schematic diagram of the side structure during the installation process of the first embodiment of this utility model. Figure 2 ; Figure 7 This is a schematic diagram of the side structure during the installation process of the first embodiment of this utility model. Figure 3 ; Figure 8 This is a schematic diagram of the side structure during the installation process of the first embodiment of this utility model. Figure 4 ; Figure 9 This is a perspective view of the second embodiment of the present invention after installation; Figure 10 This is a side view of the second embodiment of the present invention after installation; Figure 11 This is a side view of the structure when the outer bolt is loose in the second embodiment of this utility model.

[0016] Explanation of the labels in the diagram: 1 Mounting plate, 101 screw hole, 2 outer bolt, 3 polygonal limiting sleeve, 301 outer thread groove, 302 second polygonal limiting groove, 4 first fastener, 401 first polygonal limiting groove, 402 round hole, 5 second fastener, 51 threaded section, 52 polygonal end, 5201 inner thread groove, 6 inner washer, 7 outer washer, 8 colored marking ring. Detailed Implementation

[0017] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0018] First implementation method: Please see Figures 1-4 An installation structure for a pupil-tracking anti-fatigue driving image acquisition device includes a mounting plate 1 fixedly connected to the image acquisition device and multiple bidirectional fasteners for installing the mounting plate 1 inside a vehicle. In the figure, B represents the image acquisition device, which is generally an infrared device, and A represents the part to be installed inside the vehicle, which is generally a vehicle interior panel. The bidirectional fasteners include an outer bolt 2, a polygonal limiting sleeve 3, a first fastener 4, and a second fastener 5. The mounting plate 1 has multiple screw holes 101 corresponding to the bidirectional fasteners. The outer end of the first fastener 4 is threaded to the inner surface of the screw hole 101. The second fastener 5 is located inside the first fastener 4, and one end of the second fastener 5 passes through the first fastener 4 and is threaded to the vehicle interior panel. The polygonal limiting sleeve 3 is placed inside the first fastener 4, and one end of the polygonal limiting sleeve 3 is sleeved on the outer side of the second fastener 5. The outer bolt 2 is threaded to the inside of the polygonal limiting sleeve 3 and the second fastener 5. The tightening direction of the first fastener 4 in the screw hole 101 is opposite to the tightening direction of the second fastener 5 inside the vehicle interior panel.

[0019] Please see Figure 3 and Figure 4 The second fastener 5 includes a threaded section 51 and a polygonal end 52. The polygonal end 52 is located inside the first fastener 4. One end of the threaded section 51 is fixedly connected to one end of the polygonal end 52. The other end of the threaded section 51 passes through the first fastener 4 and is threadedly connected to the vehicle interior trim panel. Figure 3 and Figure 5 The first fastener 4 has a first polygonal limiting groove 401 and a circular hole 402 that are interconnected. The polygonal limiting sleeve 3 is placed inside the first polygonal limiting groove 401. The outer surface of the polygonal limiting sleeve 3 and the inner surface of the first polygonal limiting groove 401 are matching polygonal structures. The polygonal structure plays a role in restricting rotation, so that when either the polygonal limiting sleeve 3 or the first fastener 4 rotates, the other will rotate synchronously. The circular hole 402 is used for the threaded section 51 to pass through.

[0020] Please see Figure 2 and Figure 7The polygonal limiting sleeve 3 has an external threaded groove 301 and a second polygonal limiting groove 302 that are interconnected. The polygonal end 52 is inserted into the second polygonal limiting groove 302. The outer surface of the polygonal end 52 and the inner surface of the second polygonal limiting groove 302 are matching polygonal structures. This polygonal structure also serves to restrict rotation, so that when one of the polygonal limiting sleeve 3 or the second fastener 5 rotates, the other will rotate synchronously. Combined with the mutual rotation restriction between the polygonal limiting sleeve 3 and the first fastener 4 described above, there is a restriction between the assembled polygonal limiting sleeve 3, the first fastener 4 and the second fastener 5. When one of them rotates, the other two need to rotate synchronously. In other words, when one of them cannot rotate, the other two cannot rotate even if they have a loosening tendency.

[0021] Please see Figure 8 The end of the polygonal end 52 away from the threaded section 51 has an internal thread groove 5201, and the external bolt 2 is threaded into the interior of the external thread groove 301 and the internal thread groove 5201.

[0022] Please see Figure 6 and Figure 7 An inner gasket 6 is provided inside the first polygonal limiting groove 401. The inner gasket 6 is movably sleeved on the outside of the threaded section 51. One end face of the inner gasket 6 is in contact with the inner wall of the first polygonal limiting groove 401, and the other end face is in contact with the end face of the polygonal limiting sleeve 3 and the polygonal end 52. The inner gasket 6 is a rubber gasket in the prior art, which fills the gap between the polygonal end 52 and the inner wall of the first polygonal limiting groove 401, further improving the installation stability between the second fastener 5 and the vehicle.

[0023] When it is necessary to install the image acquisition device and mounting plate 1 inside a vehicle, the usage steps of this application are as follows: Step 1, such as Figure 5 As shown, firstly, multiple mounting holes (represented by a in the figure) matching the position distribution of screw holes 101 are opened on the part A to be installed (generally the interior panel of the vehicle). Then, the mounting plate 1 is attached to the surface of part A, and the screw holes 101 are connected to the mounting holes a. First, the first fastener 4 is fully threaded into the screw holes 101. Step Two, as follows Figure 6 As shown, the inner gasket 6 is placed in the first polygonal limiting groove 401, and then the threaded section 51 passes through the first polygonal limiting groove 401 and the inner gasket 6 and is threaded into the mounting hole a. The inner gasket 6 abuts between the polygonal end 52 and the first fastener 4. Step 3, as follows Figure 7As shown, the polygonal limiting sleeve 3 is placed inside the first polygonal limiting groove 401, and the polygonal end 52 is inserted into the second polygonal limiting groove 302. Due to the polygonal structure on the three, the three form mutual running restrictions and are in a state of needing to move synchronously. Step 4, as follows Figure 8 As shown, the outer bolt 2 is threaded between the outer thread groove 301 and the inner thread groove 5201, which serves to connect and fix the polygonal limiting sleeve 3 and the second fastener 5, making it difficult for the polygonal limiting sleeve 3 to move out of the first polygonal limiting groove 401.

[0024] Compared to existing threaded fastening methods, the threaded fixing method of this application has a more stable and anti-loosening effect, specifically as follows: Because the first fastener 4, the polygonal limiting sleeve 3, and the polygonal end 52 mutually restrict each other, and considering that the tightening direction of the first fastener 4 in the threaded hole 101 is opposite to the tightening direction of the second fastener 5 in the mounting hole a, if the first fastener 4 is loose, the loosening and tightening direction of the first fastener 4 will be the same as the tightening direction of the second fastener 5. The loosening of the first fastener 4 will cause the second fastener 5 to continue tightening into the mounting hole a, but since the second fastener 5 is already in a tightened state... Therefore, the second fastener 5 will hinder and restrict the loosening of the first fastener 4. In other words, even if the second fastener 5 is not tightened during initial installation, the loosening of the first fastener 4 will cause the threaded section 51 to tighten further into the mounting hole a. At this time, the second fastener 5 will further press the first fastener 4 onto the mounting part A through the inner washer 6, thereby indirectly achieving further tightening of the mounting plate 1. Conversely, if the second fastener 5 is loose, the loosening and tightening direction of the second fastener 5 is the same as the tightening direction of the first fastener 4. Therefore, the first fastener 4 will also hinder and restrict the loosening of the second fastener 5. In summary, this application uses a first fastener 4 and a second fastener 5 with opposite screwing directions to install the mounting plate 1 and the image acquisition device inside the vehicle. Then, the first fastener 4 and the second fastener 5 are connected and limited by the polygonal limiting sleeve 3, so that the movement of the three is kept synchronized. This achieves mutual restraint between the first fastener 4 and the second fastener 5 on each other's operating states, making it difficult for either of them to loosen, thereby effectively improving the stability of the image acquisition device and the mounting plate 1.

[0025] Second implementation method: This embodiment adds the following structure based on the first embodiment: Please refer to Figure 9 and Figure 10An outer washer 7 abuts against the outer bolt 2 and the mounting plate 1. The surface of the mounting plate 1 is coated with multiple colored marking rings 8. The multiple colored marking rings 8 are located on the outside of the openings of multiple screw holes 101, and the colored marking rings 8 and screw holes 101 are coaxially arranged. The diameter of the colored marking rings 8 is the same as the outer diameter of the outer washer 7, or the diameter of the colored marking rings 8 is slightly smaller than the outer diameter of the outer washer 7, so that the outer washer 7 completely covers the colored marking rings 8 under normal circumstances.

[0026] Since the outer bolt 2 itself is also at risk of loosening, after the outer bolt 2 loosens, the polygonal limiting sleeve 3 is prone to horizontal displacement between the first fastener 4 and the second fastener 5. Once the polygonal limiting sleeve 3 moves excessively to the outside, the polygonal end 52 will disengage from the second polygonal limiting groove 302, causing the polygonal limiting sleeve 3 to lose its connection limiting function for the first fastener 4 and the second fastener 5. This will cause the first fastener 4 and the second fastener 5 to lose their mutual restraint function. At this time, this application will lose the loosening effect in the first embodiment, which is the same as the ordinary bolt connection method in the prior art. Therefore, in order to promptly detect any loosening of the outer bolt 2, an outer washer 7 is provided in this embodiment. Under normal circumstances, the outer washer 7 is pressed between the outer bolt 2 and the mounting plate 1, and the placement of the outer washer 7 is approximately coaxial with the colored marking ring 8, with the colored marking ring 8 located precisely at the outer edge of the outer washer 7. When the outer bolt 2 becomes loose, the outer washer 7 is also in a loose state. At this time, under the action of the outer washer 7's own weight and the vibration of the vehicle, the position of the outer washer 7 will shift, such as... Figure 10 As shown, the outer gasket 7 covers part of the colored marking ring 8, while the other part of the colored marking ring 8 is completely exposed, allowing the driver or other people in the vehicle to clearly observe the exposed part of the colored marking ring 8. This allows them to know in time if the outer bolt 2 is loose, without the need for manual inspection of the outer bolt 2. Furthermore, if people forget to check the outer bolt 2 regularly, they can also know the looseness in time through unconscious visual observation (generally, the image acquisition device is installed directly in front of the driver, diagonally above or diagonally below, to facilitate the acquisition of the driver's pupil situation, so the driver's line of sight can be scanned relatively easily).

[0027] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. An installation structure for a pupil-tracking anti-fatigue driving image acquisition device, comprising a mounting plate (1) to which the image acquisition device is fixedly connected, characterized in that: It also includes multiple bidirectional fasteners for installing the mounting plate (1) inside the vehicle. The bidirectional fasteners include an outer bolt (2), a polygonal retaining sleeve (3), a first fastener (4), and a second fastener (5). The mounting plate (1) has multiple screw holes (101) that correspond one-to-one with the bidirectional fasteners. The outer end of the first fastener (4) is threaded to the inner surface of the screw hole (101). The second fastener (5) is located inside the first fastener (4), and one end of the second fastener (5) passes through the first fastener (4) and is threaded to the vehicle interior panel. The polygonal retaining sleeve (3) is placed inside the first fastener (4), and one end of the polygonal retaining sleeve (3) is sleeved on the outside of the second fastener (5). The outer bolt (2) is threaded to the inside of the polygonal retaining sleeve (3) and the second fastener (5). The tightening direction of the first fastener (4) in the screw hole (101) is opposite to the tightening direction of the second fastener (5) inside the vehicle interior panel.

2. The installation structure of the pupil-tracking anti-fatigue driving image acquisition device according to claim 1, characterized in that: The second fastener (5) includes a threaded section (51) and a polygonal end (52). The polygonal end (52) is located inside the first fastener (4). One end of the threaded section (51) is fixedly connected to one end of the polygonal end (52). The other end of the threaded section (51) passes through the first fastener (4) and is threadedly connected to the vehicle interior panel.

3. The installation structure of the pupil-tracking anti-fatigue driving image acquisition device according to claim 2, characterized in that: The first fastener (4) has a first polygonal limiting groove (401) and a round hole (402) that are interconnected. The polygonal limiting sleeve (3) is placed inside the first polygonal limiting groove (401), and the outer surface of the polygonal limiting sleeve (3) and the inner surface of the first polygonal limiting groove (401) are matching polygonal structures. The round hole (402) is used for the threaded section (51) to pass through.

4. The installation structure of the pupil-tracking anti-fatigue driving image acquisition device according to claim 3, characterized in that: The polygonal limiting sleeve (3) has an external threaded groove (301) and a second polygonal limiting groove (302) that are interconnected. The polygonal end (52) is inserted into the interior of the second polygonal limiting groove (302). The outer surface of the polygonal end (52) and the inner surface of the second polygonal limiting groove (302) are mutually matched polygonal structures.

5. The installation structure of the pupil-tracking anti-fatigue driving image acquisition device according to claim 4, characterized in that: The polygonal end (52) has an inner thread groove (5201) at the end away from the threaded section (51), and the outer bolt (2) is threaded into the inner thread groove (301) and the outer thread groove (5201).

6. The installation structure of the pupil-tracking anti-fatigue driving image acquisition device according to claim 3, characterized in that: The first polygonal limiting groove (401) is provided with an inner gasket (6), which is movably sleeved on the outside of the threaded section (51). One end face of the inner gasket (6) is in contact with the inner wall of the first polygonal limiting groove (401), and its other end face is in contact with the end face of the polygonal limiting sleeve (3) and the polygonal end (52).

7. The installation structure of the pupil-tracking anti-fatigue driving image acquisition device according to claim 1, characterized in that: An outer washer (7) abuts against the outer bolt (2) and the mounting plate (1). The surface of the mounting plate (1) is coated with multiple colored marking rings (8). The multiple colored marking rings (8) are located on the outside of the openings of multiple screw holes (101), and the colored marking rings (8) and screw holes (101) are coaxially arranged. The diameter of the colored marking rings (8) is the same as the outer diameter of the outer washer (7).

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