Fork device for transporting back light module

Abstract

The utility model provides a toothed fork device for transferring back light module, including drive assembly and bearing assembly, bearing assembly includes two opposite bearing mechanism, bearing mechanism includes the connecting arm, first supporting arm and second supporting arm who sets up in proper order, the connecting arm is connected with first supporting arm between horizontal rotation, first supporting arm and second supporting arm between horizontal rotation are connected, set up adsorption device on first supporting arm and second supporting arm, drive assembly can drive bearing mechanism to do perpendicular to bearing mechanism extension direction's motion, bearing mechanism is set up to can carry out angle adjustment's multisection structure, can adapt to the backboard with different surface structure, sets up two drive mechanisms to drive bearing mechanism to move independently, can adapt to the back light module of different size, has improved the flexibility and adjustment range of toothed fork device, has reduced module assembly cost, has improved work efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of backlight module transfer devices, specifically to a toothed fork device for transferring backlight modules. Background Technology

[0002] The backlight module (BLU) is a core component of a liquid crystal display (LCD), providing a uniform and bright light source for the passively emitting liquid crystal panel. Its performance directly affects the display's brightness, color, and energy consumption.

[0003] Currently, backlight module assembly lines widely use a dual-tooth fork vacuum adsorption transfer architecture. Traditional dual-tooth forks employ rigid mechanical linkage, requiring the left and right fork arms to move synchronously. When assembling backlight module backplates with irregular protrusions, positioning posts, or asymmetrical structures, the system cannot independently adjust the position of a single fork arm, failing to achieve differentiated position adjustments. This leads to misalignment between the adsorption surface and the backplate support point, necessitating additional manual intervention and impacting assembly efficiency. Furthermore, the fixed spacing between the fork arms in this dual-tooth fork design lacks flexibility. When handling ultra-large modules, the fork spacing is too small relative to the module width, potentially resulting in insufficient edge overhang and bending deformation, damaging the backlight module's quality. When handling micro-modules, the fork spacing is too large relative to the module width, relying solely on central adsorption without sufficient support, leading to a high displacement rate. Furthermore, the vacuum hole layout is fixed and cannot be reconfigured for modules of different sizes. When the surface structure of different backlight modules changes, the suction holes and structural support points may become misaligned, resulting in uneven distribution of adsorption force and reduction of effective adsorption area. Experimental data shows that when more than 30% of the suction holes are located in the non-supported area of ​​the backlight module, the system vacuum will decrease by more than 40%, which may cause the backlight module to shift. If more than 50% of the suction holes are suspended, the adsorption force will be completely ineffective.

[0004] Therefore, based on the shortcomings of the existing double-tooth fork transfer architecture, in order to improve the yield of backlight modules, there is an urgent need for a highly flexible and automated tooth fork device for transferring backlight modules to meet current production needs. Summary of the Invention

[0005] The purpose of this invention is to provide a toothed fork device for transporting backlight modules, so as to solve the above-mentioned problems.

[0006] The technical solution adopted in this utility model is as follows: A toothed fork device for transporting backlight modules includes a driving component and a carrying component. The carrying component includes two oppositely arranged carrying mechanisms. Each carrying mechanism includes a connecting arm, a first support arm, and a second support arm arranged in sequence. The connecting arm and the first support arm are horizontally rotatably connected, and the first support arm and the second support arm are horizontally rotatably connected. Adsorption devices are provided on the first support arm and the second support arm. The driving component can drive the carrying mechanism to move perpendicular to the extension direction of the carrying mechanism.

[0007] As a further improvement of the present invention, the driving assembly includes a mounting plate and two driving mechanisms disposed on the mounting plate. One of the driving mechanisms can independently drive a bearing mechanism, and the driving mechanism can drive the bearing mechanism to move closer to or away from the other bearing mechanism.

[0008] As a further improvement of the present invention, the adsorption device includes a vacuum pump and a plurality of vacuum adsorption holes, which are evenly distributed along the extension direction of the first support arm and the second support arm.

[0009] As a further improvement of this utility model, a support plate is provided at the end of the second support arm away from the first support arm, and a plurality of vacuum adsorption holes are provided on the support plate.

[0010] As a further improvement of this utility model, the pallet is horizontally rotatably connected to the second support arm.

[0011] As a further improvement of this utility model, the wedge surfaces of the two supporting mechanisms are engaged.

[0012] As a further improvement of this utility model, a first locking rotation structure is provided at the rotatable connection between the connecting arm and the first support arm. The first locking rotation structure can lock or allow the first support arm and the connecting arm to rotate horizontally relative to each other. A second locking rotation structure is provided at the connection between the first support arm and the second support arm. The second locking rotation structure can lock or allow the second support arm and the first support arm to rotate horizontally relative to each other. A third locking rotation structure is provided between the second support arm and the pallet. The third locking rotation structure can lock or allow the pallet and the second support arm to rotate horizontally relative to each other.

[0013] As a further improvement of the present invention, the first locking rotation structure includes a central shaft and a reset member. A protrusion is provided in the radial direction of the central shaft. A shaft hole is provided at the rotational connection between the connecting arm and the first support arm. A slot is provided in the shaft hole. The slot has an opening extending along the axis of the shaft hole. The protrusion cooperates with the slot. The central shaft is provided in the shaft hole. The movement of the central shaft along the axis of the shaft hole can cause the protrusion to slide out or slide into the slot. The reset member is used to reset the protrusion to the state of being locked in the slot.

[0014] As a further improvement of this utility model, the structures of the second locking rotation structure and the third locking rotation structure are consistent with the first locking rotation structure.

[0015] As a further improvement of the present invention, the driving mechanism includes a fixed plate, a lead screw, a lead screw nut, and a drive motor. The fixed plate is disposed on the mounting plate, the lead screw is rotatably disposed on the fixed plate around its axis, the lead screw nut is rotatably disposed on the lead screw, the drive motor is fixed on the lead screw nut, the drive motor can drive the lead screw nut to rotate, and the connecting arm is fixed on the drive motor.

[0016] The beneficial effects of this utility model are as follows: With the above structure, the supporting mechanism is set as a multi-section structure that can be adjusted in angle, which can be adapted to back plates with different surface structures. Two driving mechanisms are set to drive the supporting mechanism to move independently, which can be adapted to backlight modules of different sizes. This improves the flexibility and adjustment range of the toothed fork device, reduces the module assembly cost, and improves work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the top structure of the toothed fork device used to transport backlight modules; Figure 2 This is a schematic diagram of the bottom structure of the toothed fork device that supports the backlight module.

[0018] Wherein: 100-backlight module, 101-positioning post, 102-boob, 200-bearing mechanism, 201-connecting arm, 202-first support arm, 203-second support arm, 204-vacuum adsorption hole, 205-plate, 206-first locking rotation structure, 207-second locking rotation structure, 208-third locking rotation structure, 300-mounting plate, 400-drive mechanism, 401-fixed plate, 402-lead screw, 403-drive motor, 404-slide rail. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0020] If the description of this utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), then the directions involved need to be defined. For example, "To clearly express the position and direction described in this utility model, the operator of the instrument is used as a reference, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end." Or, the paper can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not required.

[0021] A toothed fork device for transporting backlight modules. Figure 1 This is a schematic diagram of the top structure of the toothed fork device used for transporting backlight modules. Figure 2 This is a schematic diagram of the bottom structure of the toothed fork device that supports the backlight module, as shown below. Figures 1-2 As shown, the toothed fork device includes a drive assembly and a support assembly. The support assembly directly supports and fixes the backlight module 100, while the drive assembly provides power for the movement of the support assembly, enabling it to adjust its spatial position to meet the needs of different backlight modules 100. Existing backlight modules 100 of different specifications have different dimensions and may have protruding structures such as bosses 102 and positioning posts 101 on their back plates.

[0022] like Figure 1As shown, the supporting assembly includes two opposing supporting mechanisms 200. Each supporting mechanism 200 includes a connecting arm 201, a first support arm 202, and a second support arm 203 arranged sequentially. The connecting arm 201 and the first support arm 202 are horizontally rotatably connected, thereby allowing adjustment of the angle between them. Similarly, the first support arm 202 and the second support arm 203 are horizontally rotatably connected, allowing adjustment of their angle to accommodate backlight modules 100 of different sizes. For back panels with different surface structures, the angle shape can be adjusted to avoid protruding surface structures, preventing collisions and damage to the back panel during transport. Furthermore, the multi-segment structural design provides a basis for angle adjustment of the supporting mechanism 200, enabling it to better adapt to different working scenarios. Adsorption devices are provided on the first support arm 202 and the second support arm 203. The adsorption devices are used to adsorb and fix the backlight module 100, ensuring that the backlight module 100 will not be displaced or fall off during transportation. The driving component can drive the supporting mechanism 200 to move perpendicular to the extension direction of the supporting mechanism 200.

[0023] For ease of description and understanding, the extension direction of the bearing mechanism 200 (that is, the direction from the connecting arm 201 and the first support arm 202 to the second support arm 203) is defined as the x-direction, and the direction in which the driving component drives the bearing mechanism 200 to move is the y-direction.

[0024] As one embodiment of this utility model, the adsorption device includes a vacuum pump and a plurality of vacuum adsorption holes 204. The backlight module 100 is fixed by negative pressure adsorption, which has advantages such as firm fixation and minimal damage to the surface of the backlight module 100. Simultaneously, the vacuum adsorption function can be individually started and stopped via a control module, allowing for zoned control and enabling operators to flexibly control the adsorption state according to actual conditions, thus improving operational convenience. Specifically, the plurality of vacuum adsorption holes 204 are evenly distributed along the extension directions of the first support arm 202 and the second support arm 203, making the adsorption force more evenly distributed on the backlight module 100, further enhancing the adsorption and fixing effect, and preventing the backlight module 100 from loosening due to insufficient local adsorption force.

[0025] As an embodiment of this utility model, a support plate 205 is provided at the end of the second support arm 203 away from the first support arm 202. The width of the support plate 205 is greater than the width of the second support arm 203 and the width of the first support arm 202. A plurality of vacuum adsorption holes 204 are provided on the support plate 205. The backlight module 100 is adsorbed and fixed by negative pressure adsorption. The support plate 205, which has a larger adsorption area, further expands the contact area between the support mechanism 200 and the backlight module 100. Together with the first support arm 202 and the second support arm 203, which also have vacuum adsorption holes 204, the adsorption and fixation of the backlight module 100 can be enhanced, which helps to improve the stability of bearing and transportation.

[0026] Furthermore, the tray 205 is horizontally rotatably connected to the second support arm 203, thereby allowing adjustment of the angle between the tray 205 and the second support arm 203 to accommodate back panels with different structures. Whether the back panel is flat or has a certain curvature or tilt angle, adjusting the angle of the tray 205 ensures a good fit between the tray 205 and the back panel, thus improving the reliability of adsorption and fixation.

[0027] As an embodiment of this utility model, the wedge surfaces of the support plates 205 of the two supporting mechanisms 200 are engaged. At this time, a plurality of vacuum adsorption holes 204 on the two support plates 205 are centrally symmetrically distributed, so that when the two support plates 205 jointly support the backlight module 100, they can form a more stable support structure and the adsorption force is more balanced, which further improves the fixing effect on the backlight module 100.

[0028] Furthermore, a connecting structure can be provided between the trays 205 of the two supporting mechanisms 200. This connecting structure includes, but is not limited to, snap-fit ​​structures and slider / slide groove structures. Through these types of connecting structures, the relative positions of the two trays 205 can be fixed as needed to enhance the support force at the end of the supporting mechanism 200 away from the driving component, preventing the stability of the backlight module 100 from being affected by the relative movement of the trays 205 during transport. For example, when transporting a large backlight module 100, the two trays 205 can be fixed into a single unit using the connecting structure, enhancing the overall load-bearing capacity and stability.

[0029] As an embodiment of this utility model, a first locking rotation structure 206 is provided at the rotatable connection between the connecting arm 201 and the first support arm 202. The first locking rotation structure 206 can lock or allow the first support arm 202 and the connecting arm 201 to rotate horizontally relative to each other. Therefore, when it is necessary to adjust the angle between the first support arm 202 and the connecting arm 201, the first locking rotation structure 206 switches to the rotation-allowing state. After the adjustment is completed, the first locking rotation structure 206 switches to the locking state. At this time, the angle between the first support arm 202 and the connecting arm 201 is fixed to ensure the stability after the angle adjustment. During the transportation process, the stability of the backlight module 100 will not be affected by the unexpected change of angle.

[0030] Furthermore, a second locking rotation structure 207 is also provided at the rotatable connection between the first support arm 202 and the second support arm 203. This second locking rotation structure 207 can lock or allow the second support arm 203 to rotate horizontally relative to the first support arm 202, thereby adjusting and fixing the angle between the first support arm 202 and the second support arm 203. The structure of the second locking rotation structure 207 is consistent with the structure of the first locking rotation structure 206.

[0031] Furthermore, a third locking rotation structure 208 can also be provided at the rotatable connection between the second support arm 203 and the support plate 205. This third locking rotation structure 208 can lock or allow the support plate 205 to rotate horizontally relative to the second support arm 203, thereby adjusting and fixing the angle between the second support arm 203 and the support plate 205. The structure of the third locking rotation structure 208 is consistent with the structure of the first locking rotation structure 206.

[0032] Specifically, the first locking rotation structure 206 can be a mechanical locking structure, or it can be a hydraulic / pneumatic locking structure in conjunction with an automated adjustment scheme. Mechanical locking structures have advantages such as simple structure, low cost, and high reliability; hydraulic / pneumatic locking structures are more suitable for highly automated production scenarios, enabling remote control and automated operation, reducing manual intervention.

[0033] As an embodiment of this utility model, the first locking rotation structure 206 includes a pressing part, a central shaft, and a resetting member. A protrusion extending away from the central shaft is provided in the radial direction of the central shaft. A shaft hole is provided at the rotatable connection between the connecting arm 201 and the first support arm 202. A slot is provided in the shaft hole. The slot extends into the connecting arm 201 and the first support arm 202 in a direction away from the axis of the shaft hole. The slot has an opening communicating with the shaft hole and an opening extending along the axis of the shaft hole. The protrusion is disposed in the slot and cooperates with the slot. The pressing part is disposed at the axial end of the central shaft. The central shaft is disposed in the shaft hole. The movement of the central shaft along the axis of the shaft hole can cause the protrusion to slide out or slide into the slot. The resetting member is used to reset the protrusion to the state of being locked in the slot.

[0034] Specifically, the reset component is a reset spring, which is disposed in the shaft hole. The central shaft has an annular limiting boss, and the reset spring is sleeved on the central shaft. One end of the reset spring is connected to the annular limiting boss, and the other end of the reset spring is fixedly connected to the wall of the shaft hole. When the pressing part is not subjected to external force, the protrusion is engaged in the slot, thereby restricting the rotation of the connecting arm 201 and the first support arm 202, so that the relative position of the connecting arm 201 and the first support arm 202 remains fixed. When the pressing part is pressed in the direction of the return spring, the annular limiting boss pushes the return spring to compress, and the protrusion slides out of the slot along the axis of the shaft hole, thereby releasing the restriction on the rotation of the connecting arm 201 and the first support arm 202. At this time, the first support arm 202 can be rotated to adjust the angle between the first support arm 202 and the connecting arm 201. After the adjustment is completed, the force applied to the pressing part is removed, the return spring resets and pushes the annular limiting boss to move away from the shaft hole, and the protrusion enters the slot until it is engaged in the limit position. At this time, the protrusion restores the restriction on the rotation of the connecting arm 201 and the first support arm 202.

[0035] The second locking rotation structure 207 and the third locking rotation structure 208 have the same structure as the first locking rotation structure 206, and their working principle is also the same, so they will not be described again here.

[0036] To further improve the anti-slip effect, anti-slip textures can be provided on the bearing mechanism 200.

[0037] In one embodiment of this utility model, the driving assembly includes a mounting plate 300, on which two driving mechanisms 400 are arranged side by side. Each driving mechanism 400 can independently drive one supporting mechanism 200, and can drive the supporting mechanism 200 to move closer to or further away from the other supporting mechanism 200. Specifically, the connecting arm 201 is disposed on the moving output structure of the driving mechanism 400. The driving mechanism 400 can drive the connecting arm 201 to move in the y-direction, thereby the connecting arm 201 can drive the first support arm 202, the second support arm 203, and the support plate 205 to move in the y-direction, realizing the adjustment of the distance between the two supporting mechanisms 200 to accommodate backlight modules 100 of different widths.

[0038] In one embodiment of this utility model, the driving mechanism 400 includes a fixed plate 401, a lead screw 402, a lead screw nut, and a drive motor 403. The fixed plate 401 is disposed on the mounting plate 300, the lead screw 402 is disposed on the fixed plate 401, and the lead screw 402 can rotate around its axis. The lead screw nut is rotatably disposed on the lead screw 402 in cooperation with it. The drive motor 403 is fixed on the lead screw nut and can drive the lead screw nut to rotate. During the rotation of the lead screw nut, the lead screw nut and the lead screw 402 form a helical pair motion, so that the lead screw nut can move along the axis of the lead screw 402 while rotating, thereby driving the drive motor 403 to move in the y-direction.

[0039] Furthermore, the connecting arm 201 is fixed to the drive motor 403, thereby allowing the connecting arm 201 to move in the y-direction along with the drive motor 403. Since each drive mechanism 400 independently drives a supporting mechanism, the two supporting mechanisms 200 can move and adjust their positions individually, or move synchronously to move closer or further apart. This independent drive design overcomes the limitation of traditional double-tooth fork structures that can only move synchronously in one direction, increasing the adjustable distance between the two sets of supporting mechanisms 200 and enabling them to adapt to more backlight modules 100 of different sizes. This significantly improves independence and flexibility.

[0040] Furthermore, to improve the stability of the movement of the connecting arm 201 driven by the drive mechanism 400, a guide mechanism can be added for motion guidance. This guide mechanism includes, but is not limited to, a lead screw and nut mechanism, a slider and slide rail 404 mechanism, etc. By adding the above-mentioned guide mechanism, the movement of the bearing mechanism 200 in the y-direction becomes more stable and precise, avoiding problems such as shaking and collision of the backlight module 100 due to unstable movement, thus providing a more reliable guarantee for the safe transport of the backlight module 100. Figure 1In this embodiment, a structure in which slide rail 404 and slide groove cooperate is adopted. At least two slide rails 404 are provided on the mounting plate 300. The slide rails 404 extend along the y direction. A slide groove that cooperates with the slide rail 404 is provided on the side of the drive motor 403 facing the mounting plate 300. When the drive motor 403 moves in the y direction, the drive motor 403 slides along the slide rail 404 to guide the movement.

[0041] The working principle of this utility model is as follows: Before adjustment begins, the two supporting mechanisms 200 are in a relatively separated state, all locking rotation structures are in a locked state, the posture of the supporting mechanism 200 remains unchanged, and the adsorption device is in a non-working state.

[0042] Based on the dimensions, structure, and other parameters of the backlight module 100 that need to be reproduced, determine the posture of the toothed fork device that needs to be adjusted, and determine the angle and distance that need to be adjusted.

[0043] When it is necessary to adjust the relative position of the two support mechanisms 200, the two drive mechanisms 400 are independently controlled to drive the two connecting arms 201 to move relative to each other in the y direction to the set position until the distance between the two support mechanisms 200 is adapted to the width of the backlight module 100.

[0044] When it is necessary to adjust the posture of the bearing mechanism 200, the first locking rotation structure 206 is operated as needed to allow rotation, the first support arm 202 is rotated, and the angle between the connecting arm 201 and the first support arm 202 is adjusted. After adjusting to a suitable angle, the first locking rotation structure 206 is switched to the locked state. The second locking rotation structure 207 is operated as needed to allow rotation, the second support arm 203 is rotated, and the angle between the first support arm 202 and the second support arm 203 is adjusted. After adjusting to a suitable angle, the second locking rotation structure 207 is switched to the locked state. The third locking rotation structure 208 is operated as needed to allow rotation, the tray 205 is rotated, and the angle between the second support arm 203 and the tray 205 is adjusted. After adjusting to a suitable angle, the third locking rotation structure 208 is switched to the locked state, until the structure of the backlight module 100 is adapted.

[0045] Control the operation of the vacuum pump to generate negative pressure in the vacuum adsorption holes 204 on the first support arm 202, the second support arm 203 and the support plate 205, so as to adsorb and fix the backlight module 100.

[0046] Subsequently, following a predetermined path, the carrier mechanism 200, driven by an external mobile device, transports the backlight module 100.

[0047] Upon reaching the target location, the vacuum adsorption function is turned off, the adsorption on the backlight module 100 is released, and the backlight module 100 is placed in the designated position, completing one transfer operation.

[0048] The toothed fork device for transferring backlight modules provided by this utility model, by setting the carrying mechanism 200 to a rotatable and adjustable structure, and by adjusting the angles between the connecting arm 201 and the first support arm 202, the first support arm 202 and the second support arm 203, and the second support arm 203 and the pallet 205, can adapt to backlight modules 100 of different sizes and backplates with different surface structures, greatly improving the applicability of the device. Two drive mechanisms 400 are provided to independently drive the carrying mechanism 200 to move, enabling individual or synchronous movement of the two carrying mechanisms 200, improving the flexibility and range of movement of the carrying mechanism 200. The use of a locking rotation structure ensures stability after angle adjustment, and the overall structure has high reliability and durability. In summary, this toothed fork device can flexibly adjust its structure according to different models and sizes of backlight modules 100 to achieve efficient and safe transfer. On automated production lines, it can also be used in conjunction with robotic arms, conveyor belts, and other equipment to achieve a fully automated transfer process, further improving production efficiency, reducing labor costs, and increasing product yield. With multi-angle and distance adjustments, it can quickly adapt to various backlight modules of different specifications 100, eliminating the need for frequent tool changes and improving work efficiency.

[0049] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0050] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A toothed fork device for transferring backlight modules, characterized in that: The device includes a drive assembly and a support assembly. The support assembly includes two support mechanisms (200) arranged opposite to each other. Each support mechanism (200) includes a connecting arm (201), a first support arm (202), and a second support arm (203) arranged in sequence. The connecting arm (201) is horizontally rotatably connected to the first support arm (202), and the first support arm (202) is horizontally rotatably connected to the second support arm (203). Adsorption devices are provided on the first support arm (202) and the second support arm (203). The drive assembly can drive the support mechanism (200) to move perpendicular to the extension direction of the support mechanism (200).

2. The toothed fork device for transferring backlight modules according to claim 1, characterized in that: The drive assembly includes a mounting plate (300) and two drive mechanisms (400) disposed on the mounting plate (300). One of the drive mechanisms (400) can independently drive a carrier mechanism (200), and the drive mechanism (400) can drive the carrier mechanism (200) to move closer to or away from the other carrier mechanism (200).

3. The toothed fork device for transferring backlight modules according to claim 1, characterized in that: The adsorption device includes a vacuum pump and a plurality of vacuum adsorption holes (204), which are evenly distributed along the extension directions of the first support arm (202) and the second support arm (203).

4. The toothed fork device for transferring backlight modules according to claim 3, characterized in that: A tray (205) is provided at the end of the second support arm (203) away from the first support arm (202), and a plurality of vacuum adsorption holes (204) are provided on the tray (205).

5. The toothed fork device for transferring backlight modules according to claim 4, characterized in that: The pallet (205) is horizontally rotatably connected to the second support arm (203).

6. The toothed fork device for transferring backlight modules according to claim 4, characterized in that: The two support plates (205) of the two support mechanisms (200) are wedge-shaped.

7. The toothed fork device for transferring backlight modules according to claim 5, characterized in that: A first locking rotation structure (206) is provided at the rotatable connection between the connecting arm (201) and the first support arm (202). The first locking rotation structure (206) can lock or allow the first support arm (202) and the connecting arm (201) to rotate horizontally relative to each other. A second locking rotation structure (207) is provided at the connection between the first support arm (202) and the second support arm (203). The second locking rotation structure (207) can lock or allow the second support arm (203) and the first support arm (202) to rotate horizontally relative to each other. A third locking rotation structure (208) is provided between the second support arm (203) and the pallet (205). The third locking rotation structure (208) can lock or allow the pallet (205) and the second support arm (203) to rotate horizontally relative to each other.

8. The toothed fork device for transferring backlight modules according to claim 7, characterized in that: The first locking rotation structure (206) includes a central shaft and a reset member. A protrusion is provided in the radial direction of the central shaft. A shaft hole is provided at the rotational connection between the connecting arm (201) and the first support arm (202). A slot is provided in the shaft hole. The slot has an opening extending along the axis of the shaft hole. The protrusion cooperates with the slot. The central shaft is provided in the shaft hole. The movement of the central shaft along the axis of the shaft hole can cause the protrusion to slide out or slide into the slot. The reset member is used to reset the protrusion to the state of being locked in the slot.

9. The toothed fork device for transferring backlight modules according to claim 8, characterized in that: The structures of the second locking rotation structure (207) and the third locking rotation structure (208) are consistent with those of the first locking rotation structure (206).

10. The toothed fork device for transferring backlight modules according to claim 2, characterized in that: The drive mechanism (400) includes a fixed plate (401), a lead screw (402), a lead screw nut, and a drive motor (403). The fixed plate (401) is mounted on the mounting plate (300). The lead screw (402) is rotatably mounted on the fixed plate (401) about its axis. The lead screw nut is rotatably mounted on the lead screw (402). The drive motor (403) is fixed on the lead screw nut and can drive the lead screw nut to rotate. The connecting arm (201) is fixed on the drive motor (403).

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