Assembly mechanism and equipment for instrument panel

Abstract

The present invention relates to an assembly mechanism and assembly equipment for an instrument screen, including a base, two working components, a manipulator, a first light source, a second light source, an image acquisition component and a controller; the base has an assembly station and a spare parts station; each working component is movably installed on the base, including a first support platform and a second support platform, the first support platform has a first light-transmitting hole corresponding to a first positioning mark, and the second support platform has a second light-transmitting hole; at the assembly station, the first light source is located below the first support platform to illuminate the first positioning mark through the first light-transmitting hole, and the second light source is located below the second support platform to illuminate the segment code screen through the second light-transmitting hole; the manipulator and the image acquisition component are movably installed on the base. The segment code screen can be automatically bonded to the backlight sheet alternately, thereby improving the bonding efficiency and yield rate of the two, and improving the user experience of the instrument screen.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument panel assembly, and in particular to an instrument panel assembly mechanism and assembly equipment. Background Art

[0002] The instrument screen can display rich colors by bonding the backlight sheet and the segment screen together. Therefore, it is used in display screens in many fields, such as the instrument screen on the car. In the prior art, the segment screen and the backlight sheet are mostly bonded by manual bonding. However, as users have higher and higher requirements for display effects, the bonding accuracy requirements for the segment screen and the backlight sheet are also getting higher and higher. The level requirements for operators are too high, and due to individual differences, it is difficult to ensure the consistency of the alignment of the segment screen and the backlight sheet after bonding, resulting in uneven display effects and poor user experience. In addition, this method has low production efficiency and is not conducive to mass production. Summary of the invention

[0003] Based on the above situation, the main purpose of the present invention is to provide an instrument screen assembly mechanism and assembly equipment, which can automatically bond the segment code screen and the backlight sheet, improve the bonding efficiency and yield rate of the two, and enhance the user experience of the instrument screen.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An assembly mechanism for an instrument screen, the instrument screen comprising a segment code screen and a backlight sheet which are attached to each other, the backlight sheet being provided with a first positioning mark, and the segment code screen being provided with a second positioning mark corresponding to the first positioning mark; the assembly mechanism comprising a base, two working components, a manipulator, a first light source, a second light source, an image acquisition component and a controller;

[0006] The base has an assembly station and a spare parts station; each of the working components is movably installed on the base, including a first support table and a second support table, the first support table has a first light-transmitting hole corresponding to the first positioning mark, and the second support table has a second light-transmitting hole; at the assembly station, the first light source is located below the first support table to illuminate the first positioning mark through the first light-transmitting hole, and the second light source is located below the second support table to illuminate the segment code screen through the second light-transmitting hole; the manipulator and the image acquisition component are movably installed on the base;

[0007] The controller controls the two working components to alternately be at the assembly station and the spare parts station, and wait at the spare parts station for the backlight sheet and the segment code screen to be placed on the first support table and the second support table respectively; at the assembly station, the controller also controls the first light source and the second light source to work to illuminate the first positioning mark and the second positioning mark, and controls the image acquisition component to respectively acquire image information of the first positioning mark and the second positioning mark, and controls the manipulator to move the backlight sheet to a position where the corresponding first positioning mark and the second positioning mark are aligned according to the position information determined by the image information, and then fits the backlight sheet to the back of the segment code screen.

[0008] Preferably, the working component also includes a bracket, and the first support platform and the second support platform are installed side by side on the bracket; each working component has the first light source installed between the bracket and the first support platform, and the second light source installed between the bracket and the second support platform.

[0009] Preferably, one group of the two working components is arranged below the other group, and the two are slidably mounted on the base along mutually parallel tracks in the horizontal direction.

[0010] Preferably, two of the first positioning marks and two of the second positioning marks are respectively provided; the assembly station is provided with fixed shooting positions corresponding to the respective positioning marks, and the controller controls the image acquisition component to move to the respective fixed shooting positions to acquire image information of the corresponding positioning marks, and the optical axis of the acquisition component is located near the corresponding positioning mark when the component is at the fixed shooting position.

[0011] Preferably, the assembly mechanism further comprises a calibration rod, and the calibration rod is detachably mounted on the manipulator;

[0012] When a working component is at the assembly station, the controller also controls the robot to drive the calibration rod to move to the position of each positioning mark, and records each position information, so as to determine the movement displacement of the backlight film in combination with the image information so that the first positioning mark is aligned with the second positioning mark.

[0013] Preferably, the first support platform has a first placement area for placing the backlight sheet, a plurality of first positioning bosses are respectively arranged at two adjacent edges of the first placement area, and the first light-transmitting hole is arranged in the first placement area so as to position the backlight sheet through the first positioning bosses;

[0014] The second supporting platform has a second placement area for placing the segment code screen, and a plurality of second positioning bosses are respectively arranged at two adjacent edges of the second placement area so as to position the segment code screen through the second positioning bosses.

[0015] Preferably, two first placement areas are arranged side by side along the length direction of the second placement area, and the first positioning boss is arranged at the edge of each first placement area.

[0016] Preferably, the second support platform comprises a substrate and a transparent support plate, the upper surface of the substrate is provided with a recessed area, and the bottom surface of the recessed area is provided with the second light-transmitting hole; the transparent support plate is installed in the recessed area to form the second placement area.

[0017] Preferably, the assembly mechanism also includes a three-axis translation stage installed on the base, the manipulator is rotatably installed on the three-axis translation stage, and the rotation axis of the manipulator is parallel to the vertical axis of the three-axis translation stage; the image acquisition component is fixedly installed on the three-axis translation stage.

[0018] The present invention also relates to an instrument panel assembly device, comprising the aforementioned assembly mechanism.

[0019] The assembly mechanism of the present invention, when attaching the backlight sheet to the segment code screen, realizes simultaneous assembly and material preparation through two working components that work alternately at the assembly station and the spare parts station, and illuminates each light source and captures an image of each positioning mark at the assembly station, thereby determining the position of the corresponding positioning mark on the backlight sheet and the segment code screen according to the image information, and then controlling the manipulator to move the backlight sheet to the position where the corresponding first positioning mark is aligned with the second positioning mark according to the two position information, and then attaching the backlight sheet to the segment code screen. This fully automated assembly method of image acquisition positioning and automatic bonding greatly reduces the process requirements for operators, and through the setting and control of each light source, it is possible to improve the accuracy of image acquisition of each positioning mark, thereby improving the position accuracy of each determined positioning mark, so that the bonding and alignment accuracy of the backlight sheet and the segment code screen is improved, the consistency is better, there is basically no difference between the finished products, and the display effect is basically indistinguishable to the human eye, thereby improving the user experience.

[0020] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the assembly mechanism and assembly equipment of the instrument panel of the present invention will be described below with reference to the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of a preferred embodiment of an assembly mechanism of an instrument panel according to the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the working component and the track;

[0024] Figure 3 It is a schematic diagram of the structure of the working components;

[0025] Figure 4 It is an exploded view of the first support platform and the first light source in the working assembly;

[0026] Figure 5 An exploded view of the second light source, the substrate and the transparent support plate in the working assembly;

[0027] Figure 6 This is a schematic diagram of the structure of the robot.

[0028] Among them: 1. Base; 2. Working component; 3. Manipulator; 4. Image acquisition component; 5. Three-axis translation stage;

[0029] 21. First working assembly; 22. Second working assembly; 23. First supporting platform; 24. Second supporting platform; 25. Bracket; 26. First light source; 27. Second light source;

[0030] 31. Suction cup; 32. Rotating shaft;

[0031] 211, first track; 221, second track;

[0032] 231, first positioning boss; 232, first placement area; 233, first light-transmitting hole; 234, glue-avoiding groove;

[0033] 241, second positioning boss; 242, second placement area; 243, substrate; 244, transparent support plate;

[0034] 311, avoidance port; 321, connection port;

[0035] 2431. Second light-transmitting hole. DETAILED DESCRIPTION

[0036] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0037] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0038] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0039] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] See also Figure 1-Figure 6 The present invention provides an assembly mechanism for an instrument screen (hereinafter referred to as "assembly mechanism"), which is used to automatically bond a backlight sheet and a segment code screen to form an instrument screen. The instrument screen includes a segment code screen and a backlight sheet bonded to each other, the backlight sheet is provided with a first positioning mark, and the segment code screen is provided with a second positioning mark corresponding to the first positioning mark; the assembly mechanism includes a base 1, two working components 2, a manipulator 3, a first light source 26, a second light source 27, an image acquisition component 4 and a controller. The first positioning mark is a light-transmitting area provided on the backlight sheet. Under the irradiation of the first light source 26, light can pass through the first positioning mark, thereby illuminating the first positioning mark to indicate the location of the first positioning mark; similarly, under the irradiation of the second light source 27, light can pass through the second positioning mark on the segment code screen, thereby illuminating the second positioning mark to indicate the location of the second positioning mark. The second positioning mark can be a liquid crystal area in the segment code screen. When the liquid crystal area is powered on, the liquid crystal in the liquid crystal area twists, so that the light from the light source can pass through the second positioning mark, thereby illuminating the second positioning mark.

[0041] The base 1 has an assembly station and a spare parts station; each working component 2 is movably installed on the base 1, and each working component 2 includes a first support table 23 and a second support table 24, the first support table 23 has a first light-transmitting hole 233 corresponding to the first positioning mark, and the second support table 24 has a second light-transmitting hole 2431; at the assembly station, the first light source 26 is located below the first support table 23 to illuminate the first positioning mark through the first light-transmitting hole 233, and the second light source 27 is located below the second support table 24 to illuminate the segment code screen through the second light-transmitting hole 2431; the manipulator 3 and the image acquisition component 4 are movably installed on the base 1.

[0042] The controller is electrically connected to the two working components, the manipulator, and the image acquisition component. The controller controls the two working components 2 to alternately be at the assembly station and the spare parts station, and wait at the spare parts station for the backlight and the segment code screen to be placed on the first support table 23 and the second support table 24 respectively; at the assembly station, the controller also controls the first light source 26 and the second light source 27 to work to illuminate the first positioning mark and the second positioning mark, and controls the image acquisition component 4 to collect image information of the first positioning mark and the second positioning mark respectively, and controls the manipulator 3 to move the backlight to a position where the corresponding first positioning mark and the second positioning mark are aligned according to the position information determined by the image information, and then fits the backlight to the back of the segment code screen.

[0043] First, a working component 2 is taken as an example to illustrate the bonding process of the segment code screen and the backlight sheet. Initially, the controller controls the working component 2 to be located at the spare parts station. At this time, spare parts can be placed on it, that is, the backlight sheet is placed face down on the first support table 23, and the segment code screen is placed face down on the second support table 24. Then the controller controls the working component 2 to move to the assembly station, and controls the first light source 26 and the second light source 27 to work. The light emitted by the first light source 26 illuminates the first positioning mark through the first light-transmitting hole, and the light emitted by the second light source 27 illuminates the second positioning mark through the second light-transmitting hole; the image acquisition component 4 can be a photographic device, which shoots the first positioning mark and the second positioning mark at a specific shooting position to obtain image information. The controller determines the positions of the first positioning mark and the second positioning mark in the assembly mechanism (that is, the coordinates in the mechanical coordinate system of the space) according to the positions of the first positioning mark and the second positioning mark in the image information, thereby realizing the first positioning mark. The purpose of positioning is to mark the first positioning mark and the second positioning mark; and then the controller can determine the position and placement angle of the backlight according to the first positioning mark, and determine the position and placement angle of the segment code screen according to the second positioning mark. The controller controls the manipulator 3 to move and grab the backlight according to the position of the backlight, and then adjusts the angle of the backlight according to the placement angle of the backlight and the placement angle of the segment code screen to make it consistent with the placement angle of the segment code screen, and then moves the backlight to the segment code screen and fits it according to the placement position of the segment code screen (first translate it to the top of the segment code screen, and then moves the backlight downward to fit the segment code screen), thereby achieving high-precision alignment and fitting between the backlight and the segment code screen. Of course, in another embodiment, the backlight can also be moved to the top of the segment code screen according to the placement position of the segment code screen, and then adjusts the angle of the backlight according to the placement angle of the backlight and the placement angle of the segment code screen to make it consistent with the placement angle of the segment code screen, and then moves the backlight downward to fit the segment code screen to obtain the instrument screen.

[0044] Specifically, take the example that the number of the first positioning marks on the backlight sheet is two, such as distributed at two diagonal positions of the backlight sheet, the image acquisition component 4 obtains first image information after photographing the first positioning marks, establishes a first image coordinate system corresponding to the first image information, and determines the coordinates of the two first positioning marks in the first image coordinate system respectively. For example, the coordinates of the two first positioning marks are (x1, y1) and (x2, y2) respectively, and the position of the backlight sheet in the first image coordinate system can be determined according to these two coordinates. For example, the position of the backlight sheet is marked with the midpoint of the line connecting the two first positioning marks, and the position of the backlight sheet in the first image coordinate system is the midpoint (x3, y3) of the two coordinates; then, according to the coordinates of the two first positioning marks, determine the x-axis of the line connecting the two first positioning marks relative to the first image coordinate system. Angle, which is used as the placement angle of the backlight sheet; a mechanical coordinate system is established in the assembly mechanism, and the image acquisition device can be adjusted when the assembly mechanism is assembled, so that the X axis of the mechanical coordinate system is parallel to the x axis of the first image coordinate system, and the Y axis of the mechanical coordinate system is parallel to the y axis of the first image coordinate system. The mechanical coordinate system has a first standard mechanical coordinate (X0, Y0), and the first image coordinate system has a first standard pixel coordinate (x0, y0). The first standard mechanical coordinate corresponds to the first standard pixel coordinate. Therefore, the deviation of the position coordinate of the backlight sheet in the mechanical coordinate system relative to the first standard mechanical coordinate (X0, Y0) can be obtained by multiplying the deviation between (x3, y3) and (x0, y0) by the conversion coefficient k1 between the first image coordinate system and the mechanical coordinate system, and then the position coordinate (X3, Y3) of the backlight sheet in the mechanical coordinate system can be obtained.

[0045] There are two second positioning marks on the segment code screen corresponding to the two first positioning marks on the same backlight film. The image acquisition component 4 obtains second image information after photographing the second positioning marks, establishes a second image coordinate system corresponding to the second image information, and determines the coordinates of the two second positioning marks in the second image coordinate system. For example, the coordinates of the two second positioning marks are (x4, y4) and (x5, y5) respectively. The position of the backlight film in the second image coordinate system can be determined based on these two coordinates. For example, the position of the segment code screen is marked with the midpoint of the two second positioning marks, and the position of the segment code screen in the second image coordinate system is the midpoint (x6, y6) of the two coordinates. Then, based on the coordinates of the two second positioning marks, the line connecting the two second positioning marks relative to the second image coordinate system is determined. The angle of the x-axis of the standard system is used as the placement angle of the segment code screen; when assembling the assembly mechanism, the image acquisition device is adjusted so that the x-axis of the mechanical coordinate system is parallel to the x-axis of the second image coordinate system, and the y-axis of the mechanical coordinate system is parallel to the y-axis of the second image coordinate system. The mechanical coordinate system has a second standard mechanical coordinate (X7, Y7), and the second image coordinate system has a second standard pixel coordinate (x7, y7). The second standard mechanical coordinate corresponds to the second standard pixel coordinate. Therefore, the deviation of the position coordinate of the segment code screen in the mechanical coordinate system relative to the second standard mechanical coordinate (X7, Y7) can be obtained according to the deviation of (x6, y6) and (x7, y7) multiplied by the conversion coefficient k2 between the second image coordinate system and the mechanical coordinate system, and then the position coordinate (X6, Y6) of the segment code screen in the mechanical coordinate system can be obtained.

[0046] In this way, the controller moves the manipulator 3 to grab the backlight according to the position coordinates of the backlight in the mechanical coordinate system, and then rotates the backlight according to the difference between the placement angle of the backlight and the placement angle of the segment code screen, so that the placement angle of the backlight is consistent with the placement angle of the segment code screen, and then, the backlight is moved to the position coordinates of the segment code screen in the mechanical coordinate system, so that the backlight and the segment code screen can be fitted, and the two first positioning marks coincide with the two second positioning marks.

[0047] At the assembly station, there is a corresponding shooting position directly above each positioning mark. At a shooting position, the image acquisition component 4 only shoots the positioning mark directly below it to obtain image information. In the obtained image information, the photographed positioning mark is basically in the middle area of ​​the image information, which improves the recognition of the positioning mark in the image information. In addition, the distortion of the partial information located in the middle area of ​​the image information is very small (the size of the mechanical coordinate system corresponding to the partial pixels in the middle area is consistent, and the size of the mechanical coordinate system corresponding to the partial pixels farther away from the middle area tends to become larger. The middle area is circular or rectangular, and the center point of the middle area is consistent with the center point of the image information. The area of ​​the middle area is 0.05-0.1 of the area of ​​the image information. 5), so that the image positioning marks are all located in the middle area of ​​the image information, and the coordinates of the positioning marks in the image coordinate system can be obtained with high precision; in this embodiment, taking two first positioning marks as an example, since the two first positioning marks taken are respectively in the two image information, the coordinates of the two first positioning marks in their respective image coordinate systems are (x1, y1) and (x2, y2), respectively, according to the standard pixel coordinates and standard mechanical coordinates corresponding to the respective image coordinate systems and the mechanical coordinate system and the conversion coefficient k, the position coordinates (X1, Y1) and (X2, Y2) of the two first positioning marks in the mechanical coordinate system are determined, and then the position coordinates (X3, Y3) of the backlight sheet in the mechanical coordinate system and the placement angle of the backlight sheet are determined based on the two (the midpoint coordinates of the two). In the same way, the position coordinates (X6, Y6) of the segment code screen in the mechanical coordinate system and the placement angle of the segment code screen are determined.

[0048] The present invention has two working components 2, and both working components 2 can be moved between an assembly station and a spare parts station. When in use, one working component 2 is located at the assembly station and the other working component 2 is located at the spare parts station. At this time, a backlight sheet and a segment code screen can be placed on the working component 2 located at the spare parts station, and the backlight sheet and the segment code screen on the working component 2 located at the assembly station are bonded to obtain an instrument screen. After both are completed, the working component 2 located at the assembly station is moved from the assembly station to the spare parts station. At the same time, the working component 2 located at the spare parts station is moved from the spare parts station to the assembly station. At this time, the instrument screen on the working component 2 located at the spare parts station can be removed, and new backlight sheet and segment code screen can be placed, and the backlight sheet and the segment code screen on the working component 2 located at the assembly station are bonded to obtain an instrument screen. In this way, the two working components 2 move alternately between the assembly station and the spare parts station, and the backlight sheet and the segment code screen can be bonded efficiently.

[0049] For example, see Figure 1The two working components 2 are respectively the first working component 21 and the second working component 22. When the first working component 21 is located at the assembly station, the second working component 22 is located at the spare parts station. At this time, the backlight sheet and the segment code screen on the first working component 21 can be bonded, and the operator can place the segment code screen and backlight sheet to be bonded on the second working component 22. After completion, the second working component 22 is moved to the assembly station, and the first working component 21 is moved to the spare parts station. Then, the backlight sheet and the segment code screen on the second working component 22 can be bonded, and the operator can remove the instrument screen on the first working component 21 and place a new backlight sheet and segment code screen to be bonded.

[0050] See also Figure 3-Figure 5 The working component 2 also includes a bracket 25, through which the working component can be slidably connected to the base. The first support platform 23 and the second support platform 24 are installed side by side on the bracket 25; each working component 2 is equipped with a first light source 26 between the bracket 25 and the first support platform 23, and a second light source 27 between the bracket 25 and the second support platform 24, that is, each working component is equipped with a set of first light sources and second light sources, and the first light sources and second light sources of the two working components work independently.

[0051] Taking a working component 2 as an example, the first support platform 23 and the second support platform 24 thereon are fixedly connected to the bracket 25, that is to say, no matter in the assembly station or the spare parts station, the position of the bracket 25 relative to the position of the first support platform 23 and the second support platform 24 remains unchanged, and the first light source 26 and the second light source 27 are installed on the bracket 25, wherein the first light source 26 is located below the first support platform 23, and the second light source 27 is located below the second support platform 24, so that no matter which station, the position of the first light source 26 relative to the first support platform 23 remains unchanged, and the position of the second light source 27 relative to the second support platform 24 remains unchanged, so that the light emitted by the first light source 26 can pass through the first light-transmitting hole 233, thereby illuminating the first positioning mark on the backlight sheet, and the light emitted by the second light source 27 can pass through the second light-transmitting hole 2431, thereby illuminating the second positioning mark on the segment code screen. In this embodiment, the distance between the two light sources and the first support plate and the second support plate is small, so that the utilization rate of the light sources can be improved, and even light sources with lower power can be used; and each working component 2 is equipped with a corresponding first light source 26 and a second light source 27, so that after the first light source 26 or the second light source 27 of one working component 2 is damaged, it will not affect the operation of the other working component 2. Of course, in this embodiment, the controller can control the corresponding light source to emit light according to the work station where the working component is located, that is, only when the working component is in the assembly station, the first light source 26 and the second light source 27 on it will emit light.

[0052] In another embodiment, the number of the first light source 26 and the second light source 27 are both one, and the first light source 26 and the second light source 27 are fixed on the base 1, and when the working component 2 is located at the assembly station, the first light source 26 is located directly below the first support platform 23 of the working component 2, and the second light source 27 is located directly below the second support platform 24 of the working component 2. In this embodiment, during the entire process of the two working components working alternately, the two light sources can be controlled to be in a working state all the time, so that the first positioning mark and the second positioning mark in different working groups can be illuminated respectively. This method saves the number of light sources and is conducive to making the structure of each working component more compact.

[0053] See also Figure 1 and Figure 2 The two working components 2 can be arranged in one group below the other group, and the two can be slidably installed on the base 1 along mutually parallel tracks in the horizontal direction.

[0054] The first working component 21 and the second working component 22 are arranged side by side up and down, with the first working component 21 on the top and the second working component 22 on the bottom. The first working component 21 slides along the first track 211 and the second working component 22 slides along the second track 221. The first track 211 and the second track 221 are parallel to each other and have the same sliding direction. The first working component 21 at the assembly station is located directly above the second working component 22 at the assembly station, and the first working component 21 at the spare parts station is located directly above the second working component 22 at the spare parts station, so that the operator can place the backlight and the segment code screen on the first working component 21 and the second working component 22 at a fixed position.

[0055] In another embodiment, two working components can be installed on the base through the same track, and the first working component 21 and the second working component 22 both slide through the track. At this time, the assembly station of the first working component 21 and the second working component 22 are in the middle position of the track, the spare parts station of the first working component 21 is at one end of the track, and the spare parts station of the second working component 22 is at the other end of the track. That is to say, the spare parts stations of the two working components 2 are respectively located at the two ends of the track, and not at the same position.

[0056] In another embodiment, the first rail 211 can be perpendicular to the second rail 221, and one end of the first rail 211 is located directly above one end of the second rail 221. When the first working component 21 slides to one end of the first rail 211, the first working component 21 is located at its assembly position, and when the second working component 22 slides to one end of the second rail 221, the second working component 22 is located at its assembly position, so that the assembly positions of the two working components 2 are basically in the same position (just misaligned up and down), when the first working component 21 slides to the other end of the first rail 211, the first working component 21 is at its spare parts position, and when the second working component 22 slides to the other end of the second rail 221, the second working component 22 is at its spare parts position.

[0057] The tracks involved in all the above embodiments extend in the horizontal direction.

[0058] Two first positioning marks and two second positioning marks are respectively provided; the assembly station has fixed shooting positions corresponding to the respective positioning marks, and the controller controls the image acquisition component 4 to move to the respective fixed shooting positions to collect image information of the corresponding positioning marks, and the optical axis of the acquisition component is located near the corresponding positioning mark when the acquisition component is at the fixed shooting position.

[0059] In this embodiment, since there is only one positioning mark in each image information, the coordinates of the positioning mark in the mechanical coordinate system can be determined based on the coordinates of the positioning mark in the image coordinate system. In this way, the coordinates of each positioning mark in the mechanical coordinate system are determined based on each image information, thereby determining the position coordinates and placement angle of the backlight film in the mechanical coordinate system, and determining the position coordinates and placement angle of the segment code screen in the mechanical coordinate system.

[0060] See also Figure 3 The first support platform 23 has a first placement area 232 for placing the backlight film, and a plurality of first positioning bosses 231 are respectively arranged at two adjacent edges of the first placement area 232. The first light-transmitting hole 233 is arranged in the first placement area to position the backlight film through the first positioning bosses 231.

[0061] A plurality of first positioning bosses 231 are provided on the first support platform 23, and the first positioning bosses 231 define a first placement area 232. Thus, when the backlight sheet is placed in the first placement area 232, the first positioning bosses 231 can position the periphery of the backlight sheet to position the backlight sheet, so that the two first positioning marks on the backlight sheet are located directly below the corresponding two shooting positions, so that the coordinates of the first positioning marks on the mechanical coordinate system can be accurately obtained through the image acquisition component 4.

[0062] The second support platform 24 has a second placement area 242 for placing the segment code screen. A plurality of second positioning bosses 241 are respectively arranged at two adjacent edges of the second placement area 242 to position the segment code screen through the second positioning bosses 241 .

[0063] A plurality of second positioning bosses 241 are provided on the second support platform 24, and the second positioning bosses 241 limit a second placement area 242. When the segment code screen is placed in the second placement area 242, the second positioning bosses 241 can position the periphery of the segment code screen to roughly position the segment code screen. The two second positioning marks on the lower segment code screen are located directly below the corresponding two shooting positions, so that the coordinates of the second positioning marks on the mechanical coordinate system can be accurately obtained through the image acquisition component 4.

[0064] Of course, in other embodiments, the first support platform 23 may be recessed to form a first placement area 232 to achieve rough positioning of the backlight sheet, and the second support platform 24 may be recessed to form a second placement area 242 to achieve rough positioning of the segment code screen.

[0065] The assembly mechanism also includes a calibration rod, which is detachably mounted on the manipulator 3 .

[0066] See also Figure 6 When the working component 2 is at the assembly station, the controller also controls the manipulator 3 to drive the calibration rod to move to the position of each positioning mark, and records each position information, so as to determine the position of the backlight and the segment code screen in the mechanical coordinate system in combination with the image information, and then determine the movement displacement to align the first positioning mark with the second positioning mark.

[0067] The calibration rod is vertically arranged. When the calibration rod is installed on the manipulator 3 , the axis of the calibration rod and the axis of the rotating shaft 32 of the manipulator 3 are on the same straight line, which can be used to determine the aforementioned standard mechanical coordinates. Taking the backlight sheet as an example, the backlight sheet is placed in the first placement area 232, and the image acquisition component 4 is at a shooting position to shoot a first positioning coordinate directly below it to obtain a shot image, and determine the coordinates of the first positioning coordinate in the first image coordinate system, which are the first standard pixel coordinates (x0, y0), and then the manipulator 3 is controlled to move so that the calibration rod is located directly above the first positioning mark (the first positioning mark photographed). At this time, the coordinates of the calibration rod in the mechanical coordinate system are the coordinates of the first positioning mark in the mechanical coordinate system, that is, the first standard mechanical coordinates (X0, Y0), thereby obtaining the first standard pixel coordinates and the first standard mechanical coordinates, so that any coordinates in the first image coordinate system can be converted into mechanical coordinates in the mechanical coordinate system, so as to position the first positioning mark on the newly placed backlight sheet later; similarly, the above operations are performed at each shooting position to obtain the standard pixel coordinates and standard mechanical coordinates corresponding to each image coordinate system and the mechanical coordinate system, respectively.

[0068] See also Figure 6 In one embodiment, the manipulator 3 includes a suction cup 31, which is mounted on a rotating shaft 32 so that the suction cup 31 can rotate in a vertical direction. A clearance opening 311 is provided in the middle of the suction cup 31, and a connecting opening 321 is provided at the lower end of the rotating shaft 32. When the calibration rod is installed on the manipulator 3, the upper end of the calibration rod passes through the clearance opening 311 and is connected to the connecting opening 321. When the calibration rod is separated from the manipulator 3, the calibration rod can be directly unscrewed from the connecting opening 321.

[0069] In the embodiment where the robot 3 includes a suction cup 31 , the suction cup 31 absorbs the backlight sheet and drives the backlight sheet to fit with the segment code screen.

[0070] See also Figure 3 For the first support platform 23, a glue avoidance groove 234 is also provided on the first placement area 232, and a double-sided tape is provided on the front of the backlight sheet. When the backlight sheet is placed in the first placement area 232, the double-sided tape is just located in the glue avoidance groove 234, thereby avoiding the backlight sheet from being bonded to the first support platform 23, making it convenient for the robot 3 to move the backlight sheet later, and making the front of the backlight sheet fit and bond with the back of the segment code screen.

[0071] Furthermore, two first placement areas 232 are arranged side by side along the length direction of the second placement area 242 , and a first positioning boss 231 is arranged at the edge of each first placement area 232 .

[0072] Two first placement areas 232 are provided on the first support table 23, and the two first placement areas 232 are arranged side by side in the length direction of the second placement area 242, so that two backlight films can be placed on the first support table 23 at the same time, and two groups of second positioning marks are provided on the corresponding segment code screen, which are located in two fitting areas of the segment code screen, and each group of second positioning marks includes two second positioning marks, and one group of second positioning marks corresponds to the two first positioning marks on the backlight film on a first placement area 232; at the assembly station, the robot 3 can grab the two backlight films respectively and fit them with the two fitting areas on the segment code screen respectively, so as to achieve the purpose of fitting two backlight films to one segment code screen.

[0073] Of course, when only one backlight sheet and one segment screen need to be attached, there is only one first placement area 232 on the first support platform 23 .

[0074] The first light-transmitting hole 233 is a small circular hole that passes through the first supporting platform 23 . When the backlight sheet is placed on the first placement area 232 , the first positioning mark is located within the range of the first light-transmitting hole 233 so that the first positioning mark can be illuminated by the first light source 26 .

[0075] When the working component 2 is at the spare parts station, the first light source 26 is in the illuminated state. At this time, the light emitted by the first light source 26 can only be emitted from the first light-transmitting hole 233. When the backlight sheet is placed in the first placement area 232, it is possible to determine whether the backlight sheet is in place by observing whether the first positioning mark is illuminated, thereby timely adjusting the position of the backlight sheet so that the first positioning marks on the backlight sheet are all illuminated, so that at the assembly station, the first positioning mark is directly below the shooting position.

[0076] See also Figure 5 The second support platform 24 includes a substrate 243 and a transparent support plate 244. The upper surface of the substrate 243 is provided with a recessed area, and the bottom surface of the recessed area is provided with a second light-transmitting hole 2431; the transparent support plate 244 is installed in the recessed area to form a second placement area 242.

[0077] The transparent support plate 244 can be made of a transparent acrylic plate. The area of ​​the second light-transmitting hole 2431 is slightly smaller than the area of ​​the recessed area, so that the transparent support plate 244 can be relatively fixed in the recessed area. The upper surface of the transparent support plate 244 forms a second placement area 242, and the second placement area 242 is located within the range of the second light-transmitting hole 2431. After the segment code screen is placed in the second placement area 242, the light emitted by the second light source 27 can pass through the entire transparent support plate 244 and illuminate the entire segment code screen. The second positioning mark belongs to the light-transmitting area on the segment code screen, thereby illuminating the second positioning mark. For the part outside the light-transmitting area on the segment code screen, the light cannot pass through to highlight the second positioning mark.

[0078] When the working component 2 is at the spare parts station, the second light source 27 is extinguished. Under this condition, the segment code screen is placed in the second placement area 242 to prevent the strong light emitted by the second light source 27 from causing damage to the operator's eyes. When the working component 2 is moved to the assembly station, the second light source 27 is turned on to illuminate the second positioning mark.

[0079] The assembly mechanism also includes a three-axis translation stage 5 installed on the base 1 , the manipulator 3 is rotatably installed on the three-axis translation stage 5 , and the rotation axis of the manipulator 3 is parallel to the vertical axis of the three-axis translation stage 5 ; the image acquisition component 4 is fixedly installed on the three-axis translation stage 5 .

[0080] The three-axis translation stage 5 can be Figure 1 The structure shown controls the servo motor to drive the manipulator 3 and the image acquisition component 4 installed on the three-axis translation stage 5 to move in the assembly mechanism, so that the image acquisition component 4 can reach each shooting position to shoot the corresponding positioning mark, and the manipulator 3 can grab the backlight sheet and drive the backlight sheet to fit with the segment code screen.

[0081] See also Figure 1The present invention also provides an instrument panel assembly device, including a mounting cover and the aforementioned assembly mechanism, the mounting cover having a connecting port, the manipulator 3, the image acquisition component 4 and the three-axis translation stage 5 are all arranged in the mounting cover, the assembly station is located in the mounting cover, the spare parts station is located outside the mounting cover, and the working component 2 moves between the assembly station and the spare parts station through the connecting port.

[0082] At the assembly station, the mounting cover can block external light from interfering with the image acquisition component 4, so that the inside of the mounting cover is in a dark light environment, making the illuminated positioning mark more obvious, thereby enabling high-precision positioning of the positioning mark, thereby achieving high-precision fitting of the backlight sheet and the segment code screen.

[0083] The assembly mechanism of the present invention, when attaching the backlight sheet to the segment code screen, realizes simultaneous assembly and material preparation through two working components 2 that work alternately at the assembly station and the spare parts station, and at the assembly station, each light source is lit and an image of each positioning mark is captured, so as to determine the position of the corresponding positioning mark on the backlight sheet and the segment code screen according to the image information, and then control the manipulator 3 to move the backlight sheet to the position where the corresponding first positioning mark is aligned with the second positioning mark according to the two position information, and then attach the backlight sheet to the segment code screen. This fully automated assembly method of image acquisition positioning and automatic bonding greatly reduces the process requirements for operators, and through the setting and control of each light source, it is possible to improve the accuracy of image acquisition of each positioning mark, thereby improving the position accuracy of each determined positioning mark, so that the bonding and alignment accuracy of the backlight sheet and the segment code screen is improved, the consistency is better, there is basically no difference between the finished products, and the display effect is basically indistinguishable to the human eye, thereby improving the user experience.

[0084] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0085] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. An assembly mechanism for an instrument screen, the instrument screen comprising a segment screen and a backlight sheet which are attached to each other, the backlight sheet being provided with a first positioning mark, and the segment screen being provided with a second positioning mark corresponding to the first positioning mark; characterized in that: The assembly mechanism includes a base, two working components, a manipulator, a first light source, a second light source, an image acquisition component and a controller; The base has an assembly station and a spare parts station; each of the working components is movably installed on the base, including a first support table and a second support table, the first support table has a first light-transmitting hole corresponding to the first positioning mark, and the second support table has a second light-transmitting hole; at the assembly station, the first light source is located below the first support table to illuminate the first positioning mark through the first light-transmitting hole, and the second light source is located below the second support table to illuminate the segment code screen through the second light-transmitting hole; the manipulator and the image acquisition component are movably installed on the base; The controller controls the two working components to alternately be at the assembly station and the spare parts station, and wait at the spare parts station for the backlight sheet and the segment code screen to be placed on the first support table and the second support table respectively; at the assembly station, the controller also controls the first light source and the second light source to work to illuminate the first positioning mark and the second positioning mark, and controls the image acquisition component to respectively acquire image information of the first positioning mark and the second positioning mark, and controls the manipulator to move the backlight sheet to a position where the corresponding first positioning mark and the second positioning mark are aligned according to the position information determined by the image information, and then fits the backlight sheet to the back of the segment code screen; wherein, the position information is the position information of the first positioning mark and the second positioning mark in the assembly mechanism.

2. The assembly mechanism according to claim 1, characterized in that: The working component also includes a bracket, and the first support platform and the second support platform are installed side by side on the bracket; each working component has the first light source installed between the bracket and the first support platform, and the second light source installed between the bracket and the second support platform.

3. The assembly mechanism according to claim 2, characterized in that: One group of the two working components is arranged below the other group, and the two are slidably installed on the base along mutually parallel tracks in the horizontal direction.

4. The assembly mechanism according to claim 1, characterized in that: Two of the first positioning marks and the second positioning marks are respectively provided; the assembly station is provided with fixed shooting positions corresponding to the respective positioning marks, and the controller controls the image acquisition component to move to the respective fixed shooting positions to acquire image information of the corresponding positioning marks, and the optical axis of the acquisition component is located near the corresponding positioning mark when the component is at the fixed shooting position.

5. The assembly mechanism according to claim 4, characterized in that: It also includes a calibration rod, which is detachably mounted on the manipulator; When a working component is at the assembly station, the controller also controls the robot to drive the calibration rod to move to the position of each positioning mark, and records each position information, so as to determine the movement displacement of the backlight film in combination with the image information so that the first positioning mark is aligned with the second positioning mark.

6. The assembly mechanism according to claim 4, characterized in that: The first support platform has a first placement area for placing the backlight sheet, a plurality of first positioning bosses are respectively arranged at two adjacent edges of the first placement area, and the first light-transmitting hole is arranged in the first placement area so as to position the backlight sheet through the first positioning bosses; The second supporting platform has a second placement area for placing the segment code screen, and a plurality of second positioning bosses are respectively arranged at two adjacent edges of the second placement area so as to position the segment code screen through the second positioning bosses.

7. The assembly mechanism according to claim 6, characterized in that: Two first placement areas are arranged side by side along the length direction of the second placement area, and the first positioning boss is arranged at the edge of each first placement area.

8. The assembly mechanism according to claim 6, characterized in that: The second support platform includes a substrate and a transparent support plate. The upper surface of the substrate is provided with a recessed area, and the bottom surface of the recessed area is provided with the second light-transmitting hole. The transparent support plate is installed in the recessed area to form the second placement area.

9. The assembly mechanism according to any one of claims 1 to 8, characterized in that: It also includes a three-axis translation stage installed on the base, the manipulator is rotatably installed on the three-axis translation stage, and the rotation axis of the manipulator is parallel to the vertical axis of the three-axis translation stage; the image acquisition component is fixedly installed on the three-axis translation stage.

10. An instrument panel assembly device, characterized in that: Comprising the assembly mechanism described in any one of claims 1-9.

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