Camera module assembly equipment and assembly method thereof

Abstract

A camera module assembly device and an assembly method thereof, comprising a frame, a feeding mechanism arranged on the frame, a camera picking mechanism, a protective cover removing mechanism, a camera height measuring mechanism, a camera transfer mechanism, a middle frame conveying device, a lens center positioning mechanism, an ink ring center positioning mechanism, a display screen height measuring mechanism, an assembly mechanism, and a re-inspection mechanism; data is acquired before assembly by the camera height measuring mechanism, the lens center positioning mechanism, the ink ring center positioning mechanism, and the display screen height measuring mechanism, and the three-dimensional coordinates of each camera module in the assembled state are calculated; the camera module is assembled with the middle frame by the assembly mechanism, so that each camera module determines the position of the assembly state according to its own measurement result, thereby reducing the assembly error of the camera module and improving the assembly accuracy of the camera module; each mechanism is independently operated and controlled, so that the assembly operation of multiple camera modules can be realized at the same time, thereby improving the assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment production equipment, and in particular to camera module assembly equipment and an assembly method thereof. Background Art

[0002] Today's society is in the rapidly developing information age, and mobile phones, as consumer communications products, have become a necessity in people's daily lives. With the advancement of optoelectronics and precision technologies, mobile phones have integrated multiple functions beyond their original communication capabilities, a typical example being digital photography. Because existing mobile phones are generally large-screen smartphones, their structural characteristics require the front-facing camera to be stacked with the display across the thickness of the phone. During phone assembly, the display and front-facing camera must be sequentially mounted on the phone's midframe before other modules are assembled.

[0003] Currently, before assembling the front camera module, the phone's midframe and display are already assembled. An ink ring is printed on the display, and the camera module is typically placed lens-downward on a tray. In existing technology, the front camera module is directly placed on a step within the phone's midframe during assembly. Glue is then used to bond the step to the camera, securing it to the midframe and maintaining a relative position between the module and the display. During use, the camera module's optical lens changes its distance from the display as it adjusts focus, necessitating a suitable distance between the display and the lens.

[0004] According to the above technical solution, the distance between the step and the display screen is basically determined, but the thickness of the front camera module itself will have an error during assembly. As a result, when the front camera module is assembled with the middle frame of the mobile phone, the distance between the display screen and the front camera module of each device will be different, thereby affecting the focusing action of the optical lens when the camera takes pictures.

[0005] There is a certain design distance and safety range between the front camera and the display screen. When the distance between the assembled front camera and the display screen is too small, the optical lens and the display screen will touch each other during focusing or when the phone is dropped, causing damage to the display screen or the optical lens. When the distance between the front camera and the display screen is too large, that is, the distance between the optical lens and the ink circle is too large, a shadow area will be generated in the area illuminated by the optical lens, affecting the use function of the device. Therefore, how to reduce the assembly error of the camera module is a technical drawback that the industry urgently needs to solve. Summary of the Invention

[0006] The main technical problem solved by the present invention is how to reduce the assembly error of the camera module.

[0007] In a first aspect, an embodiment of the present application provides a camera module assembly device for assembling a camera module into a middle frame, comprising:

[0008] A frame and a camera height measuring mechanism, a middle frame conveying device, a lens center positioning mechanism, an ink circle center positioning mechanism, a display screen height measuring mechanism, and an assembly mechanism arranged on the frame;

[0009] The camera height measuring mechanism is used to measure a first height of the camera module;

[0010] The lens center positioning mechanism is used to locate the lens center of the camera module;

[0011] The middle frame conveying device is used to support and convey the middle frame, and the display screen on the middle frame is placed face down on the middle frame conveying device. The middle frame conveying device is provided with an assembly position; the ink circle center positioning mechanism is used to locate the center of the ink circle at the assembly position;

[0012] The display screen height measuring mechanism is used to measure a second height of the display screen at the assembly position;

[0013] The assembly mechanism is used to drive the camera module to move and suspend at the assembly position, and to make the lens center of the camera module coaxial with the center of the ink circle, and the assembly mechanism is used to assemble the camera module on the middle frame at the assembly position.

[0014] Furthermore, the assembly mechanism includes an adsorption component, a five-axis linkage module and a primary curing device;

[0015] The primary curing device and the adsorption component are both arranged at the moving end of the five-axis linkage module, and the adsorption component is used to adsorb the camera module;

[0016] The five-axis linkage module is used to drive the camera module to move and suspend at the assembly position;

[0017] The display screen is pre-coated with liquid photocuring glue before assembly. The primary curing device is used to emit UV light, and the UV light is projected onto the liquid photocuring glue between the middle frame and the camera module.

[0018] Furthermore, the middle frame conveying device includes a carrier, a conveying rail and a linear module. The middle frame is placed on the carrier, and the display screen is arranged toward the carrier. The carrier is installed on the conveying rail, and the conveying rail is installed on the frame. The linear module is used to drive the carrier to move along the length direction of the conveying rail; the assembly position is set on the conveying rail, and the two sides of the assembly position are respectively set as loading position and unloading position. The carrier passes through the loading position, the assembly position and the unloading position in sequence, and is used for loading, assembling and unloading of the middle frame respectively.

[0019] Furthermore, the assembly mechanism also includes a secondary curing device with the same structure as the primary curing device, the secondary curing device is arranged at one end of the discharge position, and is used to irradiate UV light toward the liquid photocuring adhesive; the irradiation time of the secondary curing device is greater than the irradiation time of the primary curing device.

[0020] Furthermore, it also includes a camera picking mechanism, which is used to pick up the camera module; the camera picking mechanism includes a three-axis moving module, a servo motor, a rotating cylinder and a first clamp cylinder connected in sequence; the servo motor is installed at the moving end of the three-axis moving module, and the output shaft of the servo motor is vertically arranged, the output shaft of the rotating cylinder is horizontally arranged at the output end of the servo motor, the first clamp cylinder is arranged on the output shaft of the rotating cylinder, and the first clamp cylinder is used to clamp the camera module, and the rotating cylinder is used to flip the camera module.

[0021] Furthermore, it also includes a protective cover removal mechanism, which is used to remove the lens protective cover of the camera module; the protective cover removal mechanism is arranged above the TRAY plate of the camera module, and the protective cover removal mechanism includes a waste receiving box and a second clamp cylinder, the second clamp cylinder is used to clamp the lens protective cover, and separate the camera module and the lens protective cover during the process of picking up and rising the camera module, and the waste receiving box is used to hold the lens protective cover.

[0022] Furthermore, it also includes a camera transfer mechanism, which includes a sliding track, a carrier and a sliding module; the carrier is arranged on the sliding track, and a slot for placing the camera module is opened on the carrier, and the lens of the camera module is arranged toward the inner cavity of the slot; one end of the sliding track is arranged close to the three-axis moving module, and the other end is arranged close to the adsorption component, and the sliding module is used to drive the carrier to slide along the sliding track.

[0023] Furthermore, a measuring point and a rechecking point are provided on the display screen, the measuring point is provided at the coverage position of the camera module, and the rechecking point is away from the coverage position of the camera module; the display screen height detection mechanism simultaneously detects the display screen height at the measuring point and the rechecking point; and the display screen height measured at the rechecking point is used to detect whether the distance between the camera module and the display screen is within the design range.

[0024] In a second aspect, an embodiment of the present application provides a method for assembling a camera module, using the above-mentioned camera module assembly device, comprising the following steps:

[0025] S1: measuring a first height of the camera module by the camera height measuring mechanism; measuring a second height of the display screen at the assembly position by the display screen height measuring mechanism;

[0026] S2: transferring the camera module to the assembly mechanism;

[0027] S3: calculating the three-dimensional coordinates of the camera module at the assembly position based on the first height and the second height, and controlling the assembly mechanism to assemble the camera module and the middle frame according to the three-dimensional coordinates;

[0028] S4: Recheck the distance between the camera module and the display screen. If the data is qualified, proceed to the next step of assembly. If not, remove the unqualified workpiece.

[0029] Furthermore, the S3 includes the following steps:

[0030] S31: controlling the adsorption component to adsorb the side of the camera module away from the lens;

[0031] S32: Controlling the adsorption assembly to drive the adsorbed camera module to move to the lens center positioning mechanism to position the lens center of the camera module; the middle frame is transported along the middle frame conveying device until the ink circle center positioning mechanism positions the center of the ink circle, and the middle frame reaches the assembly position. When the camera module is assembled, the lens center is coaxial with the ink circle center.

[0032] S33: determining the lens center coordinates of the camera module at the assembly position based on the center of the ink circle, and obtaining the XY plane two-dimensional coordinates of the camera module at the assembly position;

[0033] S34: Calculating a floating height of the camera module at the assembly position based on the first height, the second height, and the designed distance as the Z-axis coordinate of the camera module at the assembly position; and calculating a three-dimensional coordinate of the camera module at the assembly position based on the two-dimensional coordinates in the XY plane and the Z-axis coordinate;

[0034] S35: controlling the five-axis linkage module to drive the camera module to move to the assembly position according to the three-dimensional coordinates, so that the camera module is suspended above the middle frame and contacts the liquid photocuring adhesive;

[0035] S36: Control the primary curing device to emit UV light and irradiate the liquid light-curing adhesive between the camera module and the middle frame, so that the liquid light-curing adhesive is cured, thereby achieving the connection between the camera module and the middle frame.

[0036] According to the camera module assembly equipment and assembly method of the above-mentioned embodiment, on the one hand, before assembly, by positioning the lens center of a single camera module and the ink circle center of the corresponding display screen in advance, the camera module and the display screen can be positioned at the assembly position; by measuring the height of a single camera module and the corresponding display screen in advance, the suspension height of the camera module when assembled at the assembly position can be calculated, thereby obtaining the three-dimensional coordinates of each camera module in the assembled state; by determining the coordinate position of each camera module in the assembled state through measurement data, each camera module determines the position of the assembly state according to its own measurement results, thereby reducing the assembly error of the camera module and improving the assembly accuracy of the camera module. On the other hand, the suspension assembly of the camera module is realized through the assembly mechanism, so that the camera can be tilted in a small space, with high flexibility, strong adjustability and greater applicability; at the same time, the entire assembly process is divided into multiple measurement steps and assembly steps, which can realize the independent operation of each step at the same time and cooperate with each other, greatly improving the efficiency of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the overall structure of the camera module assembly device according to an embodiment of the present application;

[0038] Figure 2 for Figure 1 A top view of

[0039] Figure 3 for Figure 1 Schematic diagram of the overall structure from another perspective;

[0040] Figure 4 It is a structural diagram of the feeding mechanism;

[0041] Figure 5 It is a structural diagram of the camera pickup mechanism;

[0042] Figure 6 for Figure 5 Enlarged view of part B;

[0043] Figure 7It is a structural diagram of the protective cover removal mechanism;

[0044] Figure 8 for Figure 1 Enlarged view of part A;

[0045] Figure 9 It is a structural schematic diagram of the middle frame conveying device;

[0046] Figure 10 It is a structural diagram of the assembly mechanism;

[0047] Figure 11 It is a structural diagram of the display screen height measurement mechanism;

[0048] Figure 12 The figure is a flow chart of a method for assembling a camera module according to an embodiment.

[0049] Figure numerals: 01, frame; 02, feeding mechanism; 021, TRAY tray; 022, stacking rack; 023, feeding module; 03, camera picking mechanism; 031, three-axis moving module; 032, servo motor; 033, rotating cylinder; 034, first clamp cylinder; 04, camera transfer mechanism; 041, sliding rail; 042, carrier; 043, sliding module; 044, positioning cylinder; 045, push plate; 05, protective cover removal mechanism; 051, waste receiving box; 052, second clamp cylinder; 06, camera height measurement mechanism; 07, middle frame conveying device; 07 1. Carrier; 072. Conveyor track; 073. Linear module; 074. Loading position; 075. Assembly position; 076. Unloading position; 08. Lens center positioning mechanism; 09. Ink circle center positioning mechanism; 10. Display screen height measurement mechanism; 101. Gantry; 102. First linear motor; 103. Second linear motor; 11. Assembly mechanism; 111. Adsorption component; 112. Five-axis linkage module; 113. Primary curing device; 114. Secondary curing device; 12. Re-inspection mechanism; 121. Feeding device; 122. Shifting device; 13. Camera module; 14. Middle frame. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0051] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0052] The serial numbers assigned to the structures herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" in this application, unless otherwise specified, include both direct and indirect connections (couplings).

[0053] Current mobile phones are generally large-screen smartphones. Due to their structural characteristics, the front-facing camera is stacked with the display screen in the thickness direction of the phone. During phone assembly, the display screen and front-facing camera must be sequentially mounted on the phone's midframe before other modules are assembled. This functionality is not limited to mobile phones; electronic devices such as tablets and laptops also share similar functions.

[0054] Currently, a typical electronic device consists of a midframe and a display mounted on it. Before assembling a mobile phone's front-facing camera module, the midframe and display are already assembled. The display is then printed with an ink ring. The camera module is typically placed in a tray, lens-downward, to hold the camera. During use, the distance between the camera module's optical lens and the display changes as it adjusts focus, necessitating a suitable distance between the display and the lens. Therefore, when assembling the front-facing camera, the individual camera modules are removed from the tray and placed in the midframe, with the lens facing the display and maintaining a certain distance. The camera module is then secured to the midframe using adhesive.

[0055] When a mobile phone is initially designed, a specific design distance and safety range is set between the front camera and the display screen. If the distance between the assembled front camera and the display screen is too small, the optical lens and the display screen may come into contact during focusing or if the phone is dropped, causing damage to the display screen or the optical lens. If the distance between the front camera and the display screen is too large, that is, the distance between the optical lens and the ink circle is too large, a shadow area will be generated in the area illuminated by the optical lens, affecting the device's functionality.

[0056] Example 1:

[0057] An embodiment of the present application provides a camera module assembly device for assembling a camera module 13 into a middle frame 14. During the assembly process of a mobile phone, after the mobile phone display screen is installed in the middle frame 14, the camera module 13 is suspended above the mobile phone middle frame 14 and maintains a certain distance from the mobile phone display screen. Liquid photocuring glue is used to fill the space between the mobile phone middle frame 14 and the camera module 13. After the camera module 13 is accurately positioned, an ultraviolet lamp is used to irradiate the liquid photocuring glue to solidify the glue into shape, thereby bonding the camera module 13 to the mobile phone middle frame 14.

[0058] In the embodiment of the present invention, referring to Figure 1 and Figure 2 The camera module assembly equipment includes a frame 01, a feeding mechanism 02 arranged on the frame 01, a camera picking mechanism 03, a protective cover removal mechanism 05, a camera height measuring mechanism 06, a camera transfer mechanism 04, a middle frame conveying device 07, a lens center positioning mechanism 08, an ink circle center positioning mechanism 09, a display screen height measuring mechanism 10, an assembly mechanism 11 and a re-inspection mechanism 12.

[0059] Reference Figure 1 、 Figure 2 and Figure 3The feeding mechanism 02 is used to transfer the TRAY tray 021. The TRAY tray 021 contains multiple camera modules 13 with their lenses facing downwards, and the TRAY tray 021 is provided with a groove for the camera pickup mechanism 03 to clamp the camera module 13. The camera pickup mechanism 03 clamps and picks up the camera module 13 in the TRAY tray 021. The protective cover removal mechanism 05 removes the lens protective cover of the camera module 13 during the process of picking up the camera module 13. The camera height measurement mechanism 06 measures the first height of the camera module 13 after removing the lens protective cover of the camera module 13. The camera transfer mechanism 04 is used to transfer the camera module 13 to a position close to the assembly mechanism 11. The middle frame conveying device 07 is used to support and convey the middle frame 14. The display screen on the middle frame 14 is placed face down on the middle frame conveying device 07. The middle frame conveying device 07 is provided with an assembly position 075. In the ink circle The center positioning mechanism 09 is used to determine the center of the ink circle at the assembly position 075, and the display screen height measuring mechanism 10 is used to measure the second height of the display screen at the assembly position 075; the assembly mechanism 11 absorbs the camera module 13 and moves it to the lens center positioning mechanism 08 to position the lens center of the camera module 13; then continues to drive the camera module 13 to move and float at the assembly position 075 and above the middle frame 14, so that the lens center of the camera module 13 is coaxial with the center of the ink circle, and the floating height is calculated through the first height of the camera module 13, the second height of the display screen and the design height, and finally the camera module 13 is fixed on the middle frame 14.

[0060] The assembly mechanism 11 realizes the suspended assembly of the camera module 13. Before assembly, the coordinate position of each camera module 13 in the assembly state is determined by measurement data, so that each camera module 13 determines the position of the assembly state according to its own measurement results, thereby reducing the assembly error of the camera module 13 and improving the assembly accuracy of the camera module 13.

[0061] Reference Figure 4 In one embodiment, the feeding mechanism 02 includes a stacking rack 022 and a feeding module 023. The stacking rack 022 is used to stack multiple layers of TRAY trays 021. The feeding module 023 is used to separate the single-layer TRAY tray 021 at the bottom from the stacking rack 022 and push it out to the camera pickup mechanism 03. The TRAY tray 021 contains multiple neatly arranged camera modules 13, and the camera modules 13 are placed with the lenses facing downward in multiple slots opened on the TRAY tray. The camera module 13 position on the TRAY tray 021 is provided with an avoidance groove for the camera pickup mechanism 03 to clamp the camera module 13.

[0062] Reference Figure 5 and Figure 6In one embodiment, the camera pickup mechanism 03 includes a three-axis moving module 031, a servo motor 032, a rotating cylinder 033 and a first clamp cylinder 034 connected in sequence; the three-axis moving module 031 is an XYZ three-axis linear moving module, the servo motor 032 is installed at the moving end of the three-axis moving module 031 and the output shaft of the servo motor 032 is vertically arranged; the output shaft of the rotating cylinder 033 is horizontally arranged and installed at the output end of the servo motor 032; the first clamp cylinder 034 is installed on the output shaft of the rotating cylinder 033, and the first clamp cylinder 034 is used to clamp The camera and the rotating cylinder 033 are used to flip the camera module 13. The base of the servo motor 032 is provided with a positioning device for the camera module 13, and moves with the first clamp cylinder 034. The positioning device of the camera module 13 adopts a CCD camera, and the CCD camera is set toward the TRAY disk 021, and is used to locate and select the camera module 13 to be picked up in the slot on the TRAY disk 021, and determine whether there is a camera module 13 in the slot. The servo motor 032 and the three-axis moving module 031 are used to drive the first clamp cylinder 034 to move and pick up the camera module 13 in the corresponding slot.

[0063] After the TRAY disk 021 moves to the position of the camera picking mechanism 03, the three-axis moving module 031 drives the camera module 13 positioning device to select and determine the camera module 13 to be clamped. The first clamp cylinder 034 moves to the top of the camera module 13 to be picked up under the drive of the three-axis moving module 031, and then rotates under the action of the servo motor 032 until the two sets of clamps of the first clamp cylinder 034 correspond to the avoidance grooves on the TRAY disk 021. Then the first clamp cylinder 034 falls and clamps the camera module 13. Then the camera module 13 moves under the action of the three-axis moving module 031 and the servo motor 032 and the height is measured.

[0064] Reference Figure 1 The camera height measuring mechanism 06 of the embodiment of the present application adopts a CCD camera, and the CCD camera is horizontally installed on the frame 01; after the first clamp cylinder 034 clamps the camera module 13 to be picked up, the rotating cylinder 033 drives the first clamp cylinder 034 and the camera module 13 to flip until the lens of the camera module 13 faces upward, and under the action of the three-axis moving module 031, the camera module 13 is moved to the measuring position of the CCD camera, and the first height of the picked camera module 13 is captured and obtained by the side CCD camera.

[0065] Reference Figure 7The protective cover removal mechanism 05 includes a waste receiving box 051 and a second clamp cylinder 052 installed on the frame 01, and the second clamp cylinder 052 is above the TRAY tray 021 of the camera module 13. At this time, the TRAY tray 021 has moved to the position to be picked up, and the two sets of clamps of the second clamp cylinder 052 move in the horizontal direction to clamp. A pause time is set in the process of the first clamp cylinder 034 picking up the camera module 13 and rising. At this time, the lens of the camera module 13 is facing downward, and the lens protection cover is buckled on the lens of the camera module 13. During the pause time, the lens protection cover of the camera module 13 is clamped by the second clamp cylinder 052. After the pause time, the first clamp cylinder 034 drives the camera module 13 to continue to rise, and separates the camera module 13 and the lens protection cover during the rising process. The second clamp cylinder 052 clamps the lens protection cover and drops it above the waste receiving box 051 and releases the clamp. The waste receiving box 051 is used to hold the lens protection cover.

[0066] Reference Figure 8 The camera transfer mechanism 04 includes a sliding rail 041, a carrier 042 and a sliding module 043; the sliding rail 041 is installed on the frame 01, and one end of the sliding rail 041 is set close to the three-axis moving module 031, and the other end is set close to the assembly mechanism 11; the carrier 042 is slidably connected to the sliding rail 041, and a slot for placing the camera module 13 is opened on the carrier 042, and the shape of the slot corresponding to the camera module 13 is set to a stepped groove, and the lens of the camera module 13 is set toward the inner cavity of the slot. A laser detection sensor is provided in the slot to determine whether the camera module 13 is present. If the laser detection sensor detects that the camera module 13 has been placed, it drives the sliding module 043 to slide to one end close to the assembly mechanism 11; if not detected, it continues to wait near the end of the three-axis moving module 031; at the same time, a clamping head avoidance groove is provided on the carrier 042 to facilitate the discharge of the first clamp cylinder 034, so as to facilitate the discharge of the first clamp cylinder 034; the sliding module 043 is used to drive the carrier 042 to slide back and forth along the length direction of the sliding track 041.

[0067] Reference Figure 8The camera transfer mechanism 04 also includes a locking cylinder 044 and a push plate 045. The locking cylinder 044 is installed on the side of the carrier 042, and the push plate 045 is fixed to one end of the telescopic shaft of the locking cylinder 044. The telescopic shaft of the locking cylinder 044 is parallel to the length of the sliding track 041 and is used to abut the side wall of the camera module 13. This can keep the camera module 13 in place during the sliding of the carrier 042, reducing excessive deviation or splashing of the camera module 13 and reducing assembly errors of the camera module 13. The camera transfer mechanism 04 is arranged in two parallel groups, and the carriers 042 on the two groups of camera transfer mechanisms 04 move in an alternating manner. When one carrier 071 is close to the three-axis moving module 031 for receiving materials, the other carrier 042 moves to one end near the assembly mechanism 11 for unloading materials, thereby improving the assembly efficiency of the camera module 13.

[0068] Reference Figure 9 In one embodiment, the middle frame conveying device 07 includes a carrier 071, a conveying rail 072 and a linear module 073. The conveying rail 072 is installed on the frame 01, and the assembly position 075 is set on the conveying rail 072. The two sides of the assembly position 075 are respectively set as the loading position 074 and the unloading position. The conveying rail 072 is sequentially set as the loading position 074, the assembly position 075 and the unloading position along the length direction; the display screen of the middle frame 14 is placed toward the carrier 071 and placed on the carrier 071, and the carrier 071 is set as a special fixture for the middle frame 14. The carrier 071 is installed on the conveying rail 072, and the linear module 073 is used to drive the carrier 071 to move along the length direction of the conveying rail 072, and the middle frame 14 placed on the carrier 071 passes through the loading position 074, the assembly position 075 and the unloading position in sequence, which are used for loading, assembling and unloading of the middle frame 14 respectively.

[0069] Reference Figure 1 In one embodiment, the assembly mechanism 11 includes an adsorption component 111, a five-axis linkage module 112, a primary curing device 113 and a secondary curing device 114; the five-axis linkage module 112 is installed on the frame 01, including an XYZ three-axis linear module 073 and two groups of servo motors 032 arranged at the mobile end of the XYZ three-axis moving module 031, one group of servo motors 032 rotates in the vertical direction (rotating U axis), and the other group of servo motors 032 rotates in the horizontal direction (rotating V axis) to realize the movement of the mobile end of the five-axis linkage module 112 within a spatial range; the primary curing device 113 and the adsorption component 111 are both arranged at the mobile end of the five-axis linkage module 112, and the primary curing device 113 and the adsorption component 111 remain relatively stationary; the adsorption component 111 of the embodiment of the present application uses a suction head for vacuum adsorption, and the primary curing device 113 of the embodiment of the present application uses a UV curing lamp to emit UV light.

[0070] Reference Figure 2 and Figure 3In the embodiment of the present application, the lens center positioning mechanism 08 is arranged on one side of the camera transfer mechanism 04, and a CCD camera is also used. The CCD camera is installed vertically and the lens is set upward; when the camera module 13 is transferred to one end of the assembly mechanism 11, the suction head of the adsorption component 111 moves to the top of the carrier 042 and adsorbs the camera module 13. At this time, the lens of the camera module 13 faces downward, and then the suction head continues to drive the camera module 13 to move to the top of the CCD camera of the lens center positioning mechanism 08, and the CCD camera shoots and determines the lens center position of the camera module 13.

[0071] Reference Figure 9 In the embodiment of the present application, the ink circle center positioning mechanism 09 is positioned below the conveyor track 072 and similarly utilizes a CCD camera, which is mounted horizontally with its lens positioned horizontally. A corner mirror is positioned at one end of the CCD camera lens to reflect light. One side of the corner mirror faces the conveyor track 072, while the other side faces the CCD camera lens. As the middle frame 14 moves along the conveyor track 072, the corner mirror allows the CCD camera to capture and locate the center of the corresponding ink circle. The middle frame 14 then pauses for assembly, i.e., reaches the assembly position 075. This allows the camera module 13, which has already located the lens center, to obtain the XY coordinates for assembly.

[0072] Reference Figure 11 In one embodiment, a gantry 101 is provided on both sides of the middle frame conveyor 07, extending across the middle frame conveyor 07. The bottom end of the gantry 101 is slidably connected to the frame 01 via a first linear motor 102. The first linear motor 102 at the bottom of the gantry 101 is parallel to the length of the conveyor rail 072, enabling the gantry 101 to move along the conveying direction of the middle frame 14. A second linear module 073 is provided on the gantry 101. The first and second linear motors 102, 103 are arranged perpendicular to each other and are not in the same horizontal plane. A display screen height measurement mechanism 10 is mounted on the gantry 101 at the movable end of the linear module 073. In this embodiment, the display screen height measurement mechanism 10 utilizes a laser displacement sensor. The gantry 101 drives the laser displacement sensor to an appropriate position and uses it to measure the depth of the display screen surface, thereby obtaining the second height of the display screen. The camera module 13's suspension height, i.e., the Z-axis coordinate, is then calculated using the first height of the camera module 13, the second height of the display screen, and the designed distance between the two.

[0073] For example, by taking the second height of the display screen as the zero point coordinate, adding the first height of the camera module 13 and the designed distance between the two, the height coordinate of the camera module 13 facing away from the lens can be obtained, thereby avoiding the inconvenience of the lens end of the camera module 13 falling under the action of gravity and affecting the calculation data. By controlling the height coordinate of the camera module 13 facing away from the lens side, the error in the assembly of the camera module 13 can be reduced.

[0074] Reference Figure 1 The secondary curing device 114 has the same structure as the primary curing device 113, and both use a UV curing lamp to emit UV light. The secondary curing device 114 is arranged at one end of the material discharge position and is used to irradiate UV light toward the liquid photocuring adhesive; the irradiation time of the secondary curing device 114 is greater than the irradiation time of the primary curing device 113. The primary curing device 113 is used to pre-fix the camera module 13 so that it remains relatively fixed with the middle frame 14, thereby improving the assembly efficiency of the assembly mechanism 11, and the camera module 13 is subsequently reinforced by the secondary curing device 114 to ensure the stability of the connection of the camera module 13.

[0075] After the camera module 13 is transferred into position, the five-axis linkage module 112 drives the suction assembly 111 to move above the carrier 042. Using the suction head, it grips the side of the camera module 13 facing away from the lens, and drives the camera module 13 to locate the lens center. By locating the center of the ink circle, the XY plane coordinates of the lens center of the camera module 13 are obtained, and the assembly position 075 is determined. The five-axis linkage module 112 then drives the suction assembly 111 to move within the spatial range and suspend it at the assembly position 075. At this point, the lens center of the camera module 13 is coaxial with the center of the ink circle. The suspension height of the camera module 13, i.e., the Z-axis coordinate, is calculated using the first height of the camera module 13, the second height of the display screen, and the designed distance. Therefore, the XYZ three-dimensional coordinates of the camera module 13 are obtained. Before assembling the display screen, the installation position of the camera module 13 is pre-coated with liquid photocuring glue. After the camera module 13 determines the suspension height, the camera module 13 and the middle frame 14 are filled and connected with liquid photocuring glue. The primary curing device 113 emits UV light toward the position of the liquid photocuring glue to pre-cure the liquid photocuring glue, thereby fixing the camera module 13 and the middle frame 14. The assembled product is then moved to the unloading position and continues to be cured through the secondary curing device 114 to strengthen the connection strength between the camera module 13 and the middle frame 14.

[0076] Reference Figure 1In one embodiment, the recheck mechanism 12 is located on the side of the secondary curing device 114 facing away from the discharge position and includes a feeding device 121, a shifting device 122, and a recheck point height measurement device. The recheck point height measurement device of this application shares the same principle as the aforementioned measurement device and utilizes a laser displacement sensor. A measurement point and a recheck point are set on the display screen. The measurement point is located within the coverage area of ​​the camera module 13, while the recheck point is located away from the coverage area of ​​the camera module 13. When measuring the display screen height, the display screen height detection mechanism simultaneously detects the display screen height at both the measurement point and the recheck point.

[0077] After secondary curing, the middle frame 14 is transferred to the feeding device 121 through the shifting device 122. The measuring point position has been covered by the camera module 13. The height of the display screen at the re-inspection point and the height of the camera module 13 away from the lens are measured by the laser displacement sensor. Combined with the data difference between the second height of the display screen at the measuring point and the height of the display screen at the re-inspection point, it is possible to calculate whether the distance between the camera module 13 and the display screen in this product is within the design range.

[0078] Typically, the camera module's lens is retracted by default. When the camera module zooms, the lens extends a certain length, and the design distance between the display screen and the camera module is based on the camera module's zoom length. When the distance between the display screen and the camera module is smaller than the design range, that is, the distance between the display screen and the camera module is smaller than the camera module's focusing length, the camera module's lens cannot be fully extended for focusing, and the lens will collide with the display screen, preventing zooming. When the distance between the display screen and the camera module is larger than the design range, the camera module's lens will still be a certain distance from the display screen when fully extended. That is, the distance between the optical lens and the ink circle is too large, causing the optical lens's illumination range to become smaller or creating a shadow area, affecting the device's functionality.

[0079] The implementation principle of the embodiment of the present application is: after the TRAY tray 021 moves to the position of the camera picking mechanism 03, the three-axis moving module 031 drives the camera module 13 positioning device to select and determine the camera module 13 to be clamped, and the first clamp cylinder 034 moves to the top of the camera module 13 to be picked up under the drive of the three-axis moving module 031, and then rotates under the action of the servo motor 032 until the two sets of clamps of the first clamp cylinder 034 correspond to the avoidance groove on the TRAY tray 021, and then the first clamp cylinder 034 falls and clamps the camera module 13. After clamping is completed, the first clamp cylinder 034 rises.

[0080] A pause is provided during the process of the first clamp cylinder 034 picking up the camera module 13 and ascending. During this pause, the second clamp cylinder 052 clamps the lens cover of the camera module 13. After the pause, the first clamp cylinder 034 drives the camera module 13 to continue ascending, separating the camera module 13 and the lens cover during the ascent. The second clamp cylinder 052 clamps the lens cover and drops it onto the waste receiving box 051. The clamping head releases, and the lens cover falls into the waste receiving box 051 for collection.

[0081] After the first clamp cylinder 034 clamps the camera module 13 to be picked up and rises to a certain height, the rotating cylinder 033 drives the first clamp cylinder 034 and the camera module 13 to flip over until the lens of the camera module 13 faces upward. Under the action of the three-axis moving module 031, the camera module 13 is moved to the measuring position of the CCD camera, and the side CCD camera is used to shoot and obtain the first height of the picked camera module 13.

[0082] After the height measurement is completed, the camera module 13 is placed on the slot of the carrier 042, and the presence of the camera module 13 is determined by the laser detection sensor. Then the carrier 042 is driven by the sliding module 043 to slide to one end close to the assembly mechanism 11 to complete the transfer of the camera module 13. At this time, the lens of the camera module 13 is facing downward.

[0083] After the camera module 13 is moved into position, the five-axis linkage module 112 drives the suction assembly 111 to move and attach to the back of the camera module 13 via the suction head, driving the camera module 13 to the lens center positioning mechanism 08 to locate the lens center. Simultaneously, the middle frame 14 is placed on the carrier 071 and moved along the conveyor track 072 by the linear module 073 until the ink circle center positioning mechanism 09 below the conveyor track 072 grasps the center of the ink circle and determines the assembly position 075. At this point, the middle frame 14 pauses and the camera module 13 is assembled.

[0084] By locating the center of the ink circle, the XY plane coordinates of the lens center of the camera module 13 are determined. The five-axis linkage module 112 drives the adsorption component 111 to move within the spatial range and suspend at the assembly position 075. At this time, the lens center of the camera module 13 is coaxial with the center of the ink circle. The suspension height of the camera module 13, that is, the Z-axis coordinate, is calculated through the first height of the camera module 13, the second height of the display screen, and the design distance. Therefore, the XYZ three-dimensional coordinates of the camera module 13 can be obtained.

[0085] Before assembling the display screen, the installation position of the camera module 13 is pre-coated with liquid photocuring glue. After the camera module 13 reaches the suspension height, the camera module 13 and the middle frame 14 are filled and connected with the liquid photocuring glue. The primary curing device 113 emits UV light toward the position of the liquid photocuring glue to pre-cure the liquid photocuring glue and fix the camera module 13 and the middle frame 14. The assembled product is then moved to the unloading position and continues to be cured through the secondary curing device 114 to strengthen the connection strength between the camera module 13 and the middle frame 14.

[0086] The middle frame 14 that has completed secondary curing is transferred to the feeding device 121 through the shifting device 122. The measuring point position has been covered by the camera module 13. The height of the display screen at the re-inspection point and the height of the camera module 13 away from the lens are measured by the laser displacement sensor. Combined with the data difference between the second height of the display screen at the measuring point and the height of the display screen at the re-inspection point, it can be calculated whether the distance between the camera module 13 and the display screen of the current product is within the design range. The middle frame 14 whose data is within the design range can be placed on the feeding device 121 for the next process. If the calculated data is not within the design range, it needs to be removed to ensure the assembly quality of the assembled product.

[0087] Example 2:

[0088] The present invention provides a method for assembling a camera module. Figure 12 , using the above-mentioned camera module assembly equipment, including the following steps:

[0089] S1: height data measurement;

[0090] Measuring a first height of the camera module 13 by the camera height measuring mechanism 06;

[0091] Step 1: The feeding mechanism 02 transfers the TRAY tray 021 to the camera pickup mechanism 03;

[0092] Step 2: The camera pickup mechanism 03 clamps and picks up the camera module 13 in the TRAY tray 021, and removes the lens protection cover of the camera module 13 through the protection cover removal mechanism 05;

[0093] Step 3: The camera pickup mechanism 03 drives the camera module 13 to flip until the lens of the camera module 13 faces upward;

[0094] Step 4: When the camera module 13 is facing upward, the camera height measuring mechanism 0606 measures the height of the camera module 1313 as a first height.

[0095] Measure a second height of the display screen at the assembly position 075 using the display screen height measuring mechanism 10;

[0096] Step 1: Apply liquid light-curing adhesive to the camera module 13 on the inner side of the display screen;

[0097] Step 2: The middle frame 14 is loaded and transported by the middle frame 14 conveying device 07, and a measuring point and a re-check point are selected on the display screen. The measuring point is set at the coverage position of the camera module 13, and the re-check point is away from the coverage position of the camera module 13. The display screen height measuring mechanism 10 is used to simultaneously detect the height of the display screen at the two points, that is, the second height.

[0098] S2: Transfer the camera module 13 to the assembly mechanism 11; the camera pickup mechanism 03 flips the camera module 13 to a position where the lens faces downward, and transfers the camera module 13 to the assembly mechanism 11 through the camera transfer mechanism 04. At this time, the lens of the camera module 13 faces downward.

[0099] S3: Calculating and obtaining the coordinates of the camera module 13 at the assembly position 075 based on the first height and the second height, and controlling the assembly mechanism 11 to assemble the middle frame 14 and the camera module 13 according to the three-dimensional coordinates;

[0100] S31: Control the adsorption component 111 to adsorb the side of the camera module 13 away from the lens;

[0101] S32: Control the adsorption assembly 111 to move the adsorbed camera module 13 to the lens center positioning mechanism 08 to position the lens center of the camera module 13; the middle frame 14 is transported along the middle frame conveying device 07 until the ink circle center positioning mechanism 09 positions the center of the ink circle. The middle frame 14 arrives at the assembly position 075. During assembly, the lens center of the camera module 13 is coaxial with the center of the ink circle.

[0102] S33: Determine the lens center coordinates of the camera module 13 at the assembly position 075 based on the center of the ink circle, and obtain the XY plane two-dimensional coordinates of the camera module 13 at the assembly position 075;

[0103] S34: Calculating a floating height of the camera module 13 at the assembly position 075 based on the first height, the second height, and the designed distance as the Z-axis coordinate of the camera module 13 at the assembly position; and calculating the three-dimensional coordinate of the camera module 13 at the assembly position 075 based on the two-dimensional coordinates in the XY plane and the Z-axis coordinates;

[0104] S35: Control the five-axis linkage module 112 to move the camera module 13 to the assembly position 075 according to the three-dimensional coordinates, so that the camera module 13 is suspended above the middle frame 14 and contacts the liquid photocuring adhesive;

[0105] S36: Control the primary curing device 113 to emit UV light and irradiate the liquid photocuring adhesive between the camera module 13 and the middle frame 14, so that the liquid photocuring adhesive is cured, connecting the camera module 13 and the middle frame 14, and completing the pre-fixation of the camera module 13; the assembled middle frame 14 is conveyed along the middle frame 14 conveying device 07 to the secondary curing device 114 for secondary strengthening.

[0106] S4: re-examination;

[0107] S41: The shifting device 122 transfers the middle frame 14 that has completed secondary curing to the feeding device 121. At this time, the measuring point position has been covered by the camera module 13.

[0108] S42: Measure the height of the display screen at the recheck point and the height of the camera module 1313 facing away from the lens using a laser displacement sensor;

[0109] S43: The distance between the camera module 13 and the display screen of the current product can be calculated by measuring the data difference between the second height of the display screen at the measurement point and the height of the display screen at the re-inspection point; the middle frame 14 whose data is within the design range can be placed on the feeding device 121 for the next assembly process, and the calculated data that is not within the design range will be discarded.

[0110] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A camera module assembly device for assembling a camera module (13) into a middle frame (14), characterized in that: include: A frame (01) and a camera height measuring mechanism (06), a middle frame conveying device (07), a lens center positioning mechanism (08), an ink ring center positioning mechanism (09), a display screen height measuring mechanism (10), and an assembly mechanism (11) arranged on the frame (01); The camera height measuring mechanism (06) is used to measure a first height of the camera module (13); The lens center positioning mechanism (08) is used to position the lens center of the camera module (13); The middle frame conveying device (07) is used to support and convey the middle frame (14), and the display screen on the middle frame (14) is placed downward on the middle frame conveying device (07). An assembly position (075) is provided on the middle frame conveying device (07); the ink circle center positioning mechanism (09) is used to position the center of the ink circle at the assembly position (075); The middle frame conveying device (07) includes a carrier (071), a conveying track (072) and a linear module (073), the middle frame (14) is placed on the carrier (071), and the display screen is arranged toward the carrier (071), the carrier (071) is installed on the conveying track (072), and the conveying track (072) is installed on the frame (01), and the linear module (073) is used to drive the carrier (071) to move along the length direction of the conveying track (072); the assembly position (075) is set on the conveying track (072), and the two sides of the assembly position (075) are respectively set as the loading position (074) and the unloading position, and the carrier (071) passes through the loading position (074), the assembly position (075) and the unloading position in sequence, and is used for loading, assembling and unloading the middle frame (14) respectively; The display screen height measuring mechanism (10) is used to measure a second height of the display screen at the assembly position (075); The assembly mechanism (11) is used to drive the camera module (13) to move and suspend at the assembly position (075), and to make the lens center of the camera module (13) coaxial with the center of the ink circle, and the assembly mechanism (11) is used to assemble the camera module (13) on the middle frame (14) at the assembly position (075); The assembly mechanism (11) comprises an adsorption component (111), a five-axis linkage module (112), and a primary curing device (113); The primary curing device (113) and the adsorption component (111) are both arranged at the mobile end of the five-axis linkage module (112), and the adsorption component (111) is used to adsorb the camera module (13); The five-axis linkage module (112) is used to drive the camera module (13) to move and suspend at the assembly position (075); The display screen is pre-coated with liquid light-curing glue before assembly, and the primary curing device (113) is used to emit UV light, and the UV light is projected onto the liquid light-curing glue between the middle frame (14) and the camera module (13).

2. The camera module assembly equipment according to claim 1, wherein: The assembly mechanism (11) further comprises a secondary curing device (114) having the same structure as the primary curing device (113), wherein the secondary curing device (114) is arranged at one end of the material discharge position and is used for irradiating UV light toward the liquid light-curing adhesive; the irradiation time of the secondary curing device (114) is greater than the irradiation time of the primary curing device (113).

3. The camera module assembly equipment according to claim 1, wherein: The invention also includes a camera pickup mechanism (03), wherein the camera pickup mechanism (03) is used to pick up the camera module (13); the camera pickup mechanism (03) includes a three-axis moving module (031), a servo motor (032), a rotating cylinder (033) and a first clamp cylinder (034) connected in sequence; the servo motor (032) is installed at the moving end of the three-axis moving module (031), and the output shaft of the servo motor (032) is vertically arranged, the output shaft of the rotating cylinder (033) is horizontally arranged at the output end of the servo motor (032), the first clamp cylinder (034) is arranged on the output shaft of the rotating cylinder (033), and the first clamp cylinder (034) is used to clamp the camera module (13), and the rotating cylinder (033) is used to flip the camera module (13).

4. The camera module assembly equipment according to claim 3, wherein: The invention also includes a protective cover removing mechanism (05), wherein the protective cover removing mechanism (05) is used to remove the lens protective cover of the camera module (13); the protective cover removing mechanism (05) is arranged above the TRAY plate (021) of the camera module (13), and the protective cover removing mechanism (05) includes a waste receiving box (051) and a second clamp cylinder (052), wherein the second clamp cylinder (052) is used to clamp the lens protective cover and separate the camera module (13) from the lens protective cover during the process of the camera module (13) being picked up and raised, and the waste receiving box (051) is used to receive the lens protective cover.

5. The camera module assembly equipment according to claim 4, wherein: The invention also includes a camera transfer mechanism (04), wherein the camera transfer mechanism (04) includes a sliding track (041), a carrier (042) and a sliding module (043); the carrier (042) is arranged on the sliding track (041), and a slot for placing the camera module (13) is provided on the carrier (042), and the lens of the camera module (13) is arranged toward the inner cavity of the slot; one end of the sliding track (041) is arranged close to the three-axis moving module (031), and the other end is arranged close to the adsorption component (111), and the sliding module (043) is used to drive the carrier (042) to slide along the sliding track (041).

6. The camera module assembly equipment according to claim 5, wherein: A measuring point and a rechecking point are provided on the display screen, wherein the measuring point is provided at a position covered by the camera module (13), and the rechecking point is away from the position covered by the camera module (13); the display screen height detection mechanism simultaneously detects the display screen heights at the measuring point and the rechecking point; and whether the distance between the camera module (13) and the display screen is within a design range is detected by measuring the display screen height at the rechecking point.

7. A camera module assembly method, using the camera module assembly device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: measuring a first height of the camera module (13) by means of the camera height measuring mechanism (06); measuring a second height of the display screen at the assembly position (075) by means of the display screen height measuring mechanism (10); S2: transferring the camera module (13) to the assembly mechanism (11); S3: calculating the three-dimensional coordinates of the camera module (13) at the assembly position (075) based on the first height and the second height, and controlling the assembly mechanism (11) to assemble the camera module (13) and the middle frame (14) according to the three-dimensional coordinates; S4: Recheck the distance between the camera module (13) and the display screen. If the data is qualified, proceed to the next step of assembly. If not, remove the unqualified workpiece.

8. The method for assembling a camera module according to claim 7, wherein: The S3 includes the following steps: S31: controlling the adsorption component (111) to adsorb the side of the camera module (13) facing away from the lens; S32: Control the adsorption component (111) to drive the adsorbed camera module (13) to move to the lens center positioning mechanism (08) to position the lens center of the camera module (13); the middle frame (14) is transported along the middle frame conveying device (07) until the ink circle center positioning mechanism (09) positions the center of the ink circle, and the middle frame (14) reaches the assembly position (075). The lens center of the camera module (13) is coaxial with the ink circle center during assembly. S33: determining the lens center coordinates of the camera module (13) at the assembly position (075) based on the center of the ink circle, and obtaining the XY plane two-dimensional coordinates of the camera module (13) at the assembly position (075); S34: Calculating the suspension height of the camera module (13) at the assembly position (075) based on the first height, the second height, and the design distance as the Z-axis coordinate of the camera module (13) at the assembly position (075); and deriving the three-dimensional coordinate of the camera module (13) at the assembly position (075) based on the two-dimensional coordinates of the XY plane and the Z-axis coordinate; S35: controlling the five-axis linkage module (112) to drive the camera module (13) to move to the assembly position (075) according to the three-dimensional coordinates, so that the camera module (13) is suspended above the middle frame (14) and contacts the liquid photoresist; S36: Controlling the primary curing device (113) to emit UV light and irradiate the liquid light-curing adhesive between the camera module (13) and the middle frame (14), so that the liquid light-curing adhesive is cured, thereby achieving the connection between the camera module (13) and the middle frame (14).

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