A detection mechanism of a notebook computer keyboard

Abstract

This utility model discloses a detection mechanism for a laptop keyboard, comprising a keyboard fixture mounted on a fixed frame, a first visual detection unit, and a second visual detection unit. The keyboard fixture is disposed on a base plate, the first visual detection unit is disposed on a middle support, and the second visual detection unit is disposed below a top plate. The keyboard fixture includes a keyboard positioning area and a cable detection area. The first visual detection unit includes a first camera and a first driving mechanism for driving the first camera to move along the X / Y directions. The second visual detection unit includes a second camera mounted below the top plate. This utility model detects the keyboard ribbon cable using the first visual detection unit and detects the characters on the keyboard keys using the second visual detection unit. The first and second visual detection units are located at different heights and operate independently. By using a transparent pressure plate to flatten the keyboard ribbon cable, accurate images of the keyboard ribbon cable are obtained, effectively reducing errors and improving detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and specifically to a testing mechanism for a laptop keyboard. Background Technology

[0002] After computer keyboards are manufactured, the characters on the keys need to be inspected. Current inspection methods typically employ image recognition, which involves taking a picture of the keyboard surface with a camera, processing the image, and analyzing whether the characters in the photo match a standard image. See patent application CN114299496A, which discloses a technical solution for a "keyboard key character detection method." This technical solution uses image recognition.

[0003] For laptops, the keyboard is integrated into the laptop body and connected to the computer via a cable, such as an FPC ribbon cable. During product manufacturing, the contact points (commonly known as gold fingers) on the FPC ribbon cable may be damaged, leading to poor contact at the connection between the keyboard and the laptop. Therefore, current laptop keyboard testing also includes testing the cable portion. See utility model patent CN214472814U, which discloses "a three-in-one online testing device for keyboard key characters, ribbon cable, and stabilizer bar," which can simultaneously test keyboard key characters, ribbon cable, and stabilizer bar. However, this technical solution also has the following shortcomings:

[0004] First, the cameras used to detect key characters and ribbon cables are all installed together. For different models of laptop keyboards, the position of the ribbon cable relative to the keyboard will change. Therefore, when testing different models of keyboard products, the camera for the ribbon cable needs to be adjusted, which is troublesome.

[0005] Secondly, due to the characteristics of its material, the ribbon cable is difficult to keep flat. Therefore, when the camera takes pictures using the above method, the curvature of the ribbon cable itself will cause errors in the photos taken, making it difficult to accurately identify the contacts of the ribbon cable.

[0006] Furthermore, with the continuous development of AI capabilities, the recognition efficiency of existing visual inspection systems has greatly improved, making existing laptop keyboard inspection mechanisms inadequate. To address these issues, the inventors propose the following technical solution. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a detection mechanism for a laptop keyboard to improve detection efficiency, effectively reduce errors, and improve detection accuracy.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A detection mechanism for a laptop keyboard, comprising: a fixed frame and a keyboard fixture, a first visual detection unit, and a second visual detection unit mounted on the fixed frame. The frame comprises, from bottom to top, a base plate, a middle support, and a top plate. The keyboard fixture is disposed on the base plate, the first visual detection unit is disposed on the middle support, and the second visual detection unit is disposed below the top plate. The keyboard fixture includes: a keyboard positioning area for positioning the keyboard body and a cable detection area located beside the keyboard positioning area. The first visual detection unit includes: a first camera and a first driving mechanism for driving the first camera to move along the X / Y direction. The first driving mechanism is mounted on the middle support and drives the first camera to move above the cable detection area. The second visual detection unit includes a second camera mounted below the top plate.

[0009] Furthermore, in the above technical solution, the first driving mechanism includes an X-axis driving component and a Y-axis driving component. The Y-axis driving component is mounted on the intermediate support, the X-axis driving component is mounted on the Y-axis driving component, and the first camera is connected to the X-axis driving component.

[0010] Furthermore, in the above technical solution, four sets of light sources are respectively arranged around the lower part of the intermediate support.

[0011] Furthermore, in the above technical solution, the light source is mounted on an adjustable lamp holder.

[0012] Furthermore, in the above technical solution, the second visual detection unit includes at least three second cameras distributed along the X-axis, and the second cameras are fixed by an X-axis horizontal plate, which is fixed to the top plate.

[0013] Furthermore, in the above technical solution, the second camera's shooting range covers the entire area of ​​the keyboard fixture.

[0014] Furthermore, in the above technical solution, a top surface light source is provided on the lower surface of the top plate.

[0015] Furthermore, in the above technical solution, the cable detection area is equipped with a top surface light source.

[0016] Furthermore, in the above technical solution, in the first visual detection unit, the first camera is connected to the first driving mechanism through the first connecting plate, and a pressure plate driven by the second driving mechanism is installed on the first connecting plate. The pressure plate runs along the Z-axis under the drive of the second driving mechanism.

[0017] Furthermore, in the above technical solution, the pressure plate is a transparent plastic plate, and the first camera is located above the pressure plate.

[0018] This invention uses a first visual detection unit to inspect the keyboard ribbon cable and a second visual detection unit to inspect the characters on the keyboard keys. The first and second visual detection units are located at different heights and operate independently. Simultaneously, the first visual detection unit moves in the X / Y directions via a first driving mechanism to adapt to variations in the ribbon cable position in different keyboard models. Finally, a transparent pressure plate flattens the keyboard ribbon cable, obtaining an accurate photograph of the cable, effectively reducing errors and improving inspection accuracy. Attached Figure Description

[0019] Figure 1 This is a first-person perspective view of this utility model;

[0020] Figure 2 This is a second-view perspective perspective view of this utility model;

[0021] Figure 3 This is a third-person perspective view of this utility model;

[0022] Figure 4 This is a perspective view of the first visual detection unit and its lower part in this utility model;

[0023] Figure 5 yes Figure 4 The right view in the middle;

[0024] Figure 6 This is a three-dimensional view of the working state of this utility model;

[0025] Figure 7 This is a three-dimensional view of the working state of Embodiment 2 of this utility model. Detailed Implementation

[0026] This utility model relates to a detection mechanism for a laptop keyboard, see [link / reference]. Figures 1 to 6 As shown, the testing mechanism includes: a fixed frame 1, a keyboard fixture 2, a first vision testing unit 3, a second vision testing unit 4, and a light source 5.

[0027] The fixed frame 1 adopts a frame structure, which includes, from bottom to top, a base plate 11, a middle support 12, and a top plate 13. The base plate 11, the middle support 12, and the top plate 13 are connected by fixed support columns. The keyboard fixture 2 is mounted on the base plate 11, the first visual inspection unit 3 is disposed on the middle support 12, and the second visual inspection unit 4 is disposed below the top plate 11.

[0028] Combination Figure 6As shown, the keyboard fixture 2 is used to position a laptop computer. It includes a keyboard positioning area 21 for positioning the keyboard body 91 and a cable detection area 22 located next to the keyboard positioning area 21.

[0029] The keyboard positioning area 21 is provided with an adjustable positioning block 210. By setting different positioning blocks 210 on the keyboard positioning area 21, an area for positioning the keyboard body 91 is formed.

[0030] The cable detection area 22 is used to place the keyboard ribbon cable 92. For example... Figure 6 As shown, when the keyboard body 91 is positioned in the keyboard positioning area 21, the keyboard ribbon cable 92 is located on the cable detection area 22. At this time, the first camera 31 in the first vision detection unit 3 takes a picture of the keyboard ribbon cable 92 and performs image detection.

[0031] The cable detection area 22 is equipped with a bottom backlight, meaning that a planar light source is used as the backlight for the cable detection area 22. When the first camera 31 takes a picture of the keyboard ribbon cable 92, the presence of the backlight makes the captured image clearer. To avoid damage to the bottom backlight, a layer of transparent plastic material can be covered on the bottom backlight as the surface of the cable detection area 22.

[0032] The first visual detection unit 3 includes a first camera 31 and a first drive mechanism 32 for driving the first camera 31 to move along the X / Y direction. The first drive mechanism 32 is mounted on the intermediate support 12 and drives the first camera 31 to move above the cable detection area 22.

[0033] Combination Figure 4 As shown, the first driving mechanism 32 includes an X-axis driving component 321 and a Y-axis driving component 322. The Y-axis driving component 322 is mounted on the intermediate support 12, and the X-axis driving component 321 is mounted on the Y-axis driving component 322. The first camera 31 is connected to the X-axis driving component 321. In this embodiment, the Y-axis driving component 322 adopts a linear slide rail, and the X-axis driving component 321 adopts a belt drive mechanism.

[0034] In this invention, the first camera 31 of the first visual detection unit 3 is connected to the X-axis drive component 321 via a first connecting plate 33, and a pressure plate 34 driven by a second drive mechanism 34 is mounted on the first connecting plate 33. The pressure plate 34 moves up and down along the Z-axis under the drive of the second drive mechanism 34. The pressure plate 34 is a transparent plastic plate, and the first camera 31 is located above the pressure plate 34. The second drive mechanism 34 can be driven by a cylinder.

[0035] The transparent pressure plate 34 is incorporated into this invention because the keyboard ribbon cable 92, due to the properties of its material, tends to warp. When the first camera 31 points downwards to take a picture, this can lead to errors in the captured image, making it impossible to accurately identify the contacts on the keyboard ribbon cable 92. This invention uses the transparent pressure plate 34 to flatten the keyboard ribbon cable 92, allowing the first camera 31 to take a picture without affecting the clarity of the captured image.

[0036] Combination Figure 3 As shown, the second visual detection unit 4 includes a second camera 42 installed below the top plate 13. Specifically, the second visual detection unit 4 includes three second cameras 42 distributed along the X-axis, and the second cameras 42 are fixed by an X-axis horizontal plate 41, which is fixed to the top plate 13. With three second cameras 42, their shooting range can cover the entire area of ​​the keyboard fixture 2, and different cameras take pictures of the key characters on the keyboard body 91 together, and the mutual comparison and detection can further improve the detection accuracy.

[0037] To further provide sufficient light, a top surface light source is provided on the lower surface of the top plate 13. Both this top surface light source and the previously mentioned bottom backlight source can be LED light-emitting panels.

[0038] In addition, four sets of light sources 5 are respectively arranged around the perimeter below the intermediate support 12. These four sets of light sources 5 are strip LED light sources. The light sources 5 are arranged horizontally below the intermediate support 12 and are mounted on an adjustable lamp holder 51. The illumination angle of the light sources 5 can be adjusted as needed during testing.

[0039] In operation, the keyboard 9 to be tested is first placed on the keyboard fixture 2, with the keyboard body 91 positioned in the keyboard positioning area 21 and the keyboard cable 92 located in the cable detection area 22. Then, the light source 5 and the top light source are turned on, and the first drive mechanism 32 in the first visual detection unit 3 is positioned to the side to avoid obstructing the second camera 42 above. The three second cameras 42 in the second visual detection unit 4 can cover the entire area of ​​the keyboard fixture 2, and the position of the second cameras 42 does not need to be adjusted for different keyboard models.

[0040] Finally, after the second visual detection unit 4 completes its imaging work, the first visual detection unit 3 is activated. The first camera 31 moves above the cable detection area 22 via the first drive mechanism 32, positioning itself directly above the keyboard ribbon cable 92. Next, the pressure plate 34, driven by the second drive mechanism 34, moves downwards along the Z-axis, pressing the transparent pressure plate 34 onto the keyboard ribbon cable 92, at which point the first camera 31 takes an image. After all imaging operations are completed, the entire mechanism resets.

[0041] See Figure 7 The image shown is a perspective view of the working state of Embodiment 2 of this utility model. This second embodiment uses a different model of keyboard 9. The position of its keyboard ribbon cable 92 is changed. The position of the first camera 31 in the first visual detection unit 3 can be adjusted via the first drive mechanism 32.

[0042] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A testing mechanism for a laptop keyboard, the testing mechanism comprising: The fixed frame (1) and the keyboard fixture (2), the first vision inspection unit (3), and the second vision inspection unit (4) mounted on the fixed frame (1) are characterized in that: The frame (1) includes, from bottom to top, a base plate (11), a middle support (12) and a top plate (13). The keyboard fixture (2) is mounted on the base plate (11), the first visual inspection unit (3) is mounted on the middle support (12), and the second visual inspection unit (4) is mounted below the top plate (11). The keyboard fixture (2) includes: a keyboard positioning area (21) for positioning the keyboard body (91) and a cable detection area (22) located next to the keyboard positioning area (21). The first visual detection unit (3) includes: a first camera (31) and a first drive mechanism (32) for driving the first camera (31) to move along the X / Y direction. The first drive mechanism (32) is mounted on the intermediate support (12) and drives the first camera (31) to move above the cable detection area (22) through the first drive mechanism (32). The second visual detection unit (4) includes a second camera (42) mounted below the top plate (13).

2. The detection mechanism for a laptop keyboard according to claim 1, characterized in that: The first drive mechanism (32) includes an X-axis drive (321) and a Y-axis drive (322). The Y-axis drive (322) is mounted on the intermediate support (12), and the X-axis drive (321) is mounted on the Y-axis drive (322). The first camera (31) is connected to the X-axis drive (321).

3. The detection mechanism for a laptop keyboard according to claim 1, characterized in that: Four sets of light sources (5) are respectively arranged around the bottom of the intermediate support (12).

4. The detection mechanism for a laptop keyboard according to claim 3, characterized in that: The light source (5) is mounted on an adjustable lamp holder (51).

5. The detection mechanism for a laptop keyboard according to claim 1, characterized in that: The second visual detection unit (4) includes at least three second cameras (42) distributed along the X-axis, and the second cameras (42) are fixed by an X-axis horizontal plate (41) fixed on the top plate (13).

6. The detection mechanism for a laptop keyboard according to claim 5, characterized in that: The second camera (42) covers the entire area of ​​the keyboard fixture (2).

7. The detection mechanism for a laptop keyboard according to claim 1, characterized in that: The top plate (13) is provided with a top surface light source on its lower surface.

8. The detection mechanism for a laptop keyboard according to claim 1, characterized in that: The cable detection area (22) is equipped with a top surface light source.

9. A detection mechanism for a laptop keyboard according to any one of claims 1-8, characterized in that: In the first visual detection unit (3), the first camera (31) is connected to the first drive mechanism (32) through the first connecting plate (33). The first connecting plate (33) is equipped with a pressure plate (35) driven by the second drive mechanism (34). The pressure plate (35) runs along the Z-axis under the drive of the second drive mechanism (34).

10. The detection mechanism for a laptop keyboard according to claim 9, characterized in that: The pressure plate (34) is a transparent plastic plate, and the first camera (31) is located above the pressure plate (34).

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