A bending device for FPC cable body

Abstract

This invention proposes a bending device for FPC (Flexible Printed Circuit) cable bodies, comprising: a machine base; a loading and positioning module disposed on the machine base, which includes a material-carrying fixture that can reciprocate along a first horizontal direction, the material-carrying fixture having a positioning groove for accommodating a camera body and the FPC cable, and the material-carrying fixture having a loading station and a bending station along its movement path; and a bending processing module disposed corresponding to the bending station, comprising: a pressing mechanism for pressing the main body of the FPC cable onto the positioning groove; a heating and pressing mechanism for pressing and heating the area of ​​the FPC cable adjacent to the bending axis; and a bending execution mechanism for supporting the part of the product to be bent and driving it to fold around the bending axis during rotation. Through the above method, high-precision and high-consistency bending processing of FPC cables is achieved, effectively improving production efficiency and product yield.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology for flexible circuit boards, and in particular to a bending device for the body of an FPC cable. Background Technology

[0002] In modern electronic devices, flexible printed circuit boards (FPCs) are widely used in camera modules due to their bendability and thinness. Such camera modules (e.g., 400) Figure 1 (As shown) It typically includes a camera body 410 and a flexible printed circuit board (FPC) cable 420. In order to adapt to the increasingly compact space layout inside the device, the bending portion 430 of the FPC cable 420 is usually bent to make it at a specific angle (such as 90°) with the main body of the FPC cable 420 so that the module can be smoothly installed in the designated position of the housing.

[0003] Currently, the bending of such precision ribbon cables is mostly done manually. Manual bending is inefficient, inconsistent, and prone to damage or bending angle deviations due to uneven force or inaccurate positioning, which directly affects the yield and reliability of camera modules. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a bending device for FPC cable bodies that has a simple structure and can achieve precise bending.

[0005] The main contents of this invention include: a machine tool; The loading and positioning module is set on the machine base and includes a loading fixture that can reciprocate along a first horizontal direction. The loading fixture has a positioning groove for accommodating the camera body and the FPC cable. The moving path of the loading fixture has a loading station and a bending station. A bending processing module, corresponding to the bending station, includes: A pressing mechanism is disposed above the material-carrying fixture, and includes a vertically lifting upper pressure plate for pressing the main body of the FPC cable onto the positioning groove. A heating and pressing mechanism is provided above the material carrier fixture, including a movable heating plate and a first driving component that drives the heating plate to move toward the material carrier fixture. The bottom of the heating plate is provided with a downwardly protruding pressing part for pressing and heating the area of ​​the FPC cable adjacent to the bending axis. A bending actuator includes a folding plate that can rotate about a bending axis, a rotary drive that drives the folding plate to rotate, and a second drive assembly that drives the folding plate to move; the folding plate is used to support the part of the product to be bent and drives it to fold about the bending axis when rotating until it abuts against the side of the pressing part.

[0006] Preferably, the positioning groove is configured to conform to the shape of the camera body and the FPC cable, and a positioning block is provided on the periphery of the positioning groove, and a vacuum adsorption hole is provided at the bottom of the positioning groove. When the camera module is placed in the positioning groove, the bending portion of the FPC cable extends outside the material carrier fixture, and the bending axis of the FPC cable is collinear with the edge of the positioning groove.

[0007] Preferably, the pressing part is located on the side of the heating plate near the bending axis and extends along the bending axis, and the extension width of the pressing part is greater than the width of the FPC cable.

[0008] Preferably, the outer wall of the pressing part is provided as an inclined plane, which extends inclinedly from the bottom of the pressing part to the top and toward the inside of the material carrier fixture. The upper end face of the folding plate is rotated upward from the horizontal initial position to fit with the inclined plane, and the rotation angle is greater than 90°.

[0009] Preferably, the upper end face of the folding plate is provided with a first clearance groove on the side away from the bending axis, and the upper side surface of the heating pressure plate is provided with a second clearance groove.

[0010] Preferably, the pressing mechanism further includes a first lifting drive component that drives the upper pressing plate to move vertically up and down.

[0011] Preferably, the first driving component includes a first lateral driving member that drives the heating platen to move horizontally and a second lifting driving member that drives the heating platen to rise and fall vertically.

[0012] Preferably, the second driving component includes a second lateral driving member that drives the folding plate to move horizontally and a third lifting driving member that drives the folding plate to rise and fall vertically.

[0013] Preferably, the loading and positioning module further includes a first linear motion module that drives the loading fixture to move along the first horizontal direction.

[0014] The beneficial effects of this invention are as follows: by heating and softening a local area of ​​the FPC cable before bending through the heating and pressing mechanism, the internal stress of the material is effectively reduced; then, by using the pressing part with the inclined surface, in conjunction with the folding plate to perform the "over-bending" action (rotation angle greater than 90°), the springback of the cable material can be compensated, so that the angle of the cable after bending can be restored to near the target angle, effectively improving the accuracy and consistency of the bending angle. Attached Figure Description

[0015] Figure 1 A schematic diagram of the 3D structure of the camera module to be processed; Figure 2This is a three-dimensional structural schematic diagram of a preferred embodiment; Figure 3 This is a three-dimensional structural schematic diagram of a material-carrying fixture in a preferred embodiment; Figure 4 This is a three-dimensional structural diagram of the bending processing module in a preferred embodiment; Figure 5 for Figure 4 A magnified schematic diagram of the local structure at point A; Figure label: 100. Machine tool; 200. Feeding and positioning module; 210. Loading fixture; 211. Positioning groove; 212. Positioning block; 220. First linear motion module; 300. Bending processing module; 310. Pressing mechanism; 311. Upper pressure plate; 312. First lifting drive component; 320. Heating and pressing mechanism; 321. Heating pressure plate; 322. Pressing part; 323. First transverse drive component; 324. Second lifting drive component; 325. Second clearance groove; 330. Bending execution mechanism; 331. Folding plate; 332. Rotation drive component; 333. Second transverse drive component; 334. Third lifting drive component; 335. First clearance groove; 400. Camera module; 410. Camera body; 420. FPC cable; 430. Section to be bent. Detailed Implementation

[0016] The technical solution protected by this invention will be described in detail below with reference to the accompanying drawings.

[0017] This application proposes a bending device for FPC cable bodies, mainly used for bending... Figure 1 The FPC cable of the camera module shown is bent to achieve the required angle (approximately 90°). For example... Figure 2 As shown, the equipment mainly includes a machine base 100, on which a feeding and positioning module 200 and a bending processing module 300 are installed.

[0018] like Figure 1-3As shown, the loading and positioning module 200 includes a loading fixture 210, which has a positioning groove 211 for accommodating the camera body 410 and the FPC cable 420. The loading fixture 210 is driven by a first linear motion module 220 and can reciprocate along a first horizontal direction. Its movement path includes a loading station and a bending station. The first linear motion module 220 drives the loading fixture 210 to switch between the two stations to achieve continuous operation. Specifically, the shape of the positioning groove 211 matches the shape of the camera body 410 and the FPC cable 420. When the camera module 400 is placed in the positioning groove 211, the bending portion 430 of the FPC cable extends outside the loading fixture 210, and the bending axis of the FPC cable is collinear with the edge of the positioning groove 211, so as to accurately fold the bending portion.

[0019] like Figure 3 As shown, a positioning block 212 is circumferentially arranged in the positioning groove 211. The positioning block 212 guides and limits the product placement process to ensure accurate product placement and effectively restrict the product's horizontal position. In addition, a vacuum adsorption hole (not shown) is provided at the bottom of the positioning groove 211. The vacuum adsorption hole is connected to a vacuum generator. Through negative pressure adsorption, the flexible FPC cable 420 can be flatly fixed in the groove to prevent it from wrinkling or shifting before processing.

[0020] like Figure 2 As shown, when the material carrier fixture 210 moves to the bending station, the bending processing module starts to work. This module mainly includes a material pressing mechanism 310, a heating and pressing mechanism 320, and a bending execution mechanism 330.

[0021] like Figure 1-4 As shown, the pressing mechanism 310 is located above the material carrier fixture 210, and mainly includes an upper pressing plate 311 and a first lifting drive component 312 that drives the upper pressing plate 311 to move vertically up and down. The upper pressing plate 311 is used to press down before bending, to stably press the main body of the FPC cable 420 into the positioning groove 211, preventing it from shifting or sliding during the bending process, thereby ensuring the accuracy of the bending position.

[0022] like Figure 1-5As shown, the heating and pressing mechanism 320 is also positioned above the material carrier fixture 210. It includes a heating pressure plate 321 and a first driving assembly that drives the heating pressure plate 321 to move towards the material carrier fixture. The first driving assembly includes a first lateral movement drive 323 that drives the heating pressure plate 321 to move horizontally, and a second lifting drive 324 that drives the heating pressure plate 321 to move vertically. These drive components work together to achieve precise adjustment of the position of the heating pressure plate 321. The bottom of the heating pressure plate 321, near the bending axis, has a downwardly protruding pressing part 322. This pressing part 322 extends along the bending axis, and its width in the extending direction is greater than the width of the FPC cable 420, ensuring complete coverage of the area to be bent. The heating pressure plate 321 is connected to an electric heater. The pressing part 322 can heat a localized area of ​​the FPC cable 420 near the bending axis, softening the cable material, reducing internal stress during bending, reducing springback, and thus improving the stability of the bending angle.

[0023] like Figure 1-5 As shown, the outer wall of the pressing part 322 is set as an inclined plane. The inclined plane extends from the bottom of the pressing part 322 to the top and towards the inside of the material carrier fixture 210, so that when the upper end face of the folding plate 331 rotates upward from the horizontal initial position to fit with the inclined plane, its rotation angle is greater than 90°. That is, the folding plate 331 can push the ribbon cable to be bent part 430 to rotate more than 90° to achieve "over-bending" to compensate for material springback, so that the ribbon cable can still maintain a target angle close to 90° after springback.

[0024] like Figure 1-5 As shown, the bending actuator 330 is responsible for performing the specific folding action. It includes a folding plate 331, a rotary drive 332 that drives the folding plate 331 to rotate around the bending axis, and a second drive assembly that drives the folding plate 331 to move as a whole. The second drive assembly is specifically composed of a second lateral drive 333 and a third lifting drive 334, which allows the folding plate 331 to move closer to or further away from the product in the horizontal direction and to move up and down in the vertical direction to accurately move it below the part to be bent 430. In the initial state, the upper surface of the folding plate 331 is horizontal in the initial position. Then, the second drive assembly drives the folding plate 331 to move to the working position, so that the upper surface of the folding plate 331 is in contact with the lower surface of the FPC cable to be bent 430, and its side surface is in contact with the side of the material carrier 210.

[0025] like Figure 5 As shown, preferably, the upper end of the folding plate 331 is provided with a first clearance groove 335 on the side away from the bending axis, and the upper side of the heating pressure plate 321 is also provided with a second clearance groove 325, which is used to avoid the protruding structure on the FPC cable to be bent part 430, and to avoid interference when pushed into place.

[0026] Driven by the rotary drive 332, the folding plate 331 rotates upward around the bending axis, pushing the part of the FPC cable 420 to be bent upward until it is completely pressed against the inclined side of the pressing part 322, and the cable springback is effectively suppressed through the "over-bending" design.

[0027] In a specific embodiment, the first transverse drive and the second transverse drive can be cylinders, hydraulic cylinders, or electric slides; the first lifting drive, the second lifting drive, and the third lifting drive can be cylinders, hydraulic cylinders, or electric push rods, without specific limitations.

[0028] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A bending device for FPC cable bodies, characterized in that, Mainly includes: Machine (100); A loading and positioning module (200) is installed on the machine base (100). It includes a loading fixture (210) that can reciprocate along a first horizontal direction. The loading fixture (210) has a positioning groove (211) for accommodating the camera body (410) and the FPC cable (420). The loading fixture (210) has a loading station and a bending station on its movement path. A bending processing module (300), corresponding to the bending station setup, includes: The pressing mechanism (310) is located above the material carrier fixture (210) and includes a vertically lifting upper pressure plate (311) for pressing the main body of the FPC cable (420) onto the positioning groove (211); The heating and pressing mechanism (320) is disposed above the material carrier fixture (210), including a movable heating plate (321) and a first driving component that drives the heating plate (321) to move toward the material carrier fixture (210). The bottom of the heating plate (321) is provided with a downwardly protruding pressing part (322) for pressing and heating the area of ​​the FPC cable (420) adjacent to the bending axis. The bending actuator (330) includes a folding plate (331) rotatable about a bending axis, a rotary drive (332) for driving the folding plate (331) to rotate, and a second drive assembly for driving the folding plate (331) to move; the folding plate (331) is used to support the part of the product to be bent (430) and drive it to fold about the bending axis when rotating until it abuts against the side of the pressing part (322).

2. The bending device for FPC cable body according to claim 1, characterized in that, The positioning groove (211) is configured in the same shape as the camera body (410) and the FPC cable (420). A positioning block (212) is provided on the periphery of the positioning groove (211), and a vacuum adsorption hole is provided at its bottom. When the camera module is placed in the positioning groove (211), the part to be bent (430) extends outside the material carrier (210), and the bending axis of the FPC cable (420) is collinear with the edge of the positioning groove (211).

3. The bending device for FPC cable body according to claim 1, characterized in that, The pressing part (322) is located on the side of the heating plate (321) near the bending axis and extends along the bending axis. The extension width of the pressing part (322) is greater than the width of the FPC cable (420).

4. The bending device for FPC cable body according to claim 3, characterized in that, The outer wall of the pressing part (322) is provided as an inclined plane. The inclined plane extends inclinedly from the bottom of the pressing part (322) to the top and toward the inside of the material carrier (210). The upper end face of the folding plate (331) is rotated upward from the horizontal initial position to fit with the inclined plane, and its rotation angle is greater than 90°.

5. The bending device for FPC cable body according to claim 1, characterized in that, The upper end of the folding plate (331) is provided with a first clearance groove (335) on the side away from the bending axis, and the upper side surface of the heating plate (321) is provided with a second clearance groove (325).

6. The bending device for FPC cable body according to claim 1, characterized in that, The pressing mechanism (310) also includes a first lifting drive (312) that drives the upper pressure plate (311) to rise and fall vertically.

7. The bending device for FPC cable body according to claim 1, characterized in that, The first driving assembly includes a first lateral driving member (323) that drives the heating plate (321) to move horizontally and a second lifting driving member (324) that drives the heating plate (321) to rise and fall vertically.

8. The bending device for FPC cable body according to claim 1, characterized in that, The second drive assembly includes a second lateral drive (333) that drives the folding plate (331) to move horizontally and a third lifting drive (334) that drives the folding plate (331) to rise and fall vertically.

9. The bending device for FPC cable body according to claim 1, characterized in that, The loading and positioning module (200) further includes a first linear motion module (220) that drives the loading fixture (210) to move along the first horizontal direction.

Images