Flexible flat cable bending test device

Abstract

The utility model relates to a flexible flat cable bending test device, relates to flexible flat cable durability test technical field, including base, vertical installation on it mounting plate, with mounting plate vertical fixed hinge shaft, two turnover plates of symmetrical arrangement and can overturn around hinge shaft, and drive arrangement. Turnover plate bottom is equipped with gear teeth, realizes synchronous overturn through drive motor drive drive gear and transmission gear, to fix and bend flexible flat cable both ends. Can realize compression type or stretching type bending through different assembly mode, adapts to multiple test demand. The protection cover is externally installed to drive system to prevent foreign matter from invading, ensure that operation stability and prolong service life. Photoelectric counter is used for accurate record bending times, provides data support for the evaluation flexible flat cable fatigue life. The utility model improves the effectiveness, representativeness and flexibility of test, is applicable to high frequency durability test under industrial environment.

Description

Technical Field

[0001] This utility model relates to the field of flexible cable durability testing technology, and in particular to a flexible cable bending testing device. Background Technology

[0002] In the continuous iteration and upgrading of electronic products, flexible ribbon cables, as key connection components for complex spatial wiring, directly affect the stability of the overall device performance due to their long-term reliability. Especially in applications such as foldable phones and wearable devices where frequent deformation occurs, flexible ribbon cables need to withstand tens or even hundreds of thousands of repeated bends. Therefore, accurate assessment of their bending resistance is crucial. Currently, the testing methods commonly used in the industry still have many technical shortcomings.

[0003] On the one hand, many testing devices have simple structures and rely on manual bending or asynchronous drive mechanisms, resulting in inconsistent bending actions. This makes it difficult to ensure the stability of bending frequency, angle, and stress state during the test, seriously affecting the repeatability and comparability of test data. On the other hand, existing equipment can often only simulate bending conditions in a single direction or mode, and cannot take into account both compression bending and tensile bending that may occur in the actual assembly of flexible wiring harnesses, thus limiting the comprehensiveness and applicability of the test.

[0004] Furthermore, some automated testing equipment is complex in structure, expensive, and lacks reasonable avoidance design for moving parts, making it prone to mechanical interference during repeated operation, affecting equipment lifespan and testing continuity. These technical bottlenecks not only reduce testing efficiency but also fail to accurately reflect the fatigue characteristics of flexible ribbon cables under complex working conditions. Therefore, there is an urgent need for a testing device that can overcome the above-mentioned defects, stably simulate various bending modes, has a reasonable structure, and possesses automated control capabilities, to meet the practical needs of scientifically, efficiently, and accurately evaluating the durability of flexible ribbon cables. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a flexible cable bending test device.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A flexible cable bending test device, comprising: Base; Mounting plate, vertically mounted on the base; The hinge shaft is fixedly connected perpendicularly to the surface of the mounting plate. The flip plates are two symmetrically arranged plates. The bottom of the two flip plates is hinged to the hinge axis, and the two flip plates can be flipped around the hinge axis to the corresponding fitting state. Each of the two flip plates has a clearance notch at the position corresponding to the hinge axis. The flip plates are used to fix the two ends of the flexible ribbon cable and drive the flexible ribbon cable to bend around the hinge axis. The drive unit, mounted on the mounting plate, is used to drive the two flip plates to rotate around the hinge axis.

[0007] Preferably, the bottom of the tilting plate is provided with gear teeth, and the driving device includes: The drive motor is mounted on the side of the mounting plate away from the flip plate, and the output shaft of the drive motor moves through the mounting plate. The drive gear is mounted on the output shaft of the drive motor. The transmission gears consist of two gears that are rotatably connected to the mounting plate. The two transmission gears mesh with the drive gear and are respectively meshed with the corresponding teeth of the two flip plates.

[0008] Preferably, the mounting plate is fitted with a protective cover at the position corresponding to the drive gear and the transmission gear.

[0009] Preferably, the hinge shaft is detachably connected to a stop bar.

[0010] Preferably, the inner surface of the flip plate is a stepped surface, and a magnet for pressing the flexible cable is magnetically connected to the stepped surface.

[0011] Preferably, a photoelectric counter is mounted on the mounting plate.

[0012] By adopting the technical solution described above, this utility model has the following beneficial effects: (1) The two flip plates of this utility model are symmetrically hinged to the mounting plate through the hinge axis, and are provided with a clearance notch to achieve smooth rotation around the hinge axis. The flip plates can be flipped from the unfolded state to fit together, forming a periodic opening and closing motion, thereby driving the flexible ribbon cable fixed on its surface to bend repeatedly, simulating the dynamic bending condition in actual use. The test process is close to the real application scenario, improving the effectiveness and representativeness of the test.

[0013] (2) The surface of the flip plate of this utility model can be used to fix the two ends of the flexible ribbon cable. According to the test requirements, it can be fixed on the inner or outer surface to realize different test modes of compression bending or tensile bending, adapt to the bending performance evaluation under various assembly methods, and enhance the flexibility and applicability of the test. The drive device is integrated on the mounting plate. The drive motor drives the drive gear to rotate, and then the two meshing transmission gears drive the arc-shaped gear tooth structure at the bottom of the flip plate respectively to realize synchronous and symmetrical reciprocating flipping action. The transmission path is clear and the structure is compact, which ensures the stability and repeatability of the movement process, effectively avoids the problem of uneven force on the ribbon cable caused by asynchronous movement, and improves the consistency and reliability of the test results.

[0014] (3) This utility model further adds a protective cover to the outside of the drive system, which can effectively isolate dust, debris and other foreign objects from entering the gear meshing area, prevent transmission jamming, increased wear or motor overload caused by impurities, significantly improve the operation stability and service life of the transmission system, and ensure the smooth progress of long-term continuous testing, especially suitable for high-frequency durability test scenarios in industrial environments. The detachable stop bar on the hinge shaft serves as a bending forming mandrel, so that the flexible cable always bends around its outer circumference during the test, limiting the minimum bending radius, ensuring that the geometric conditions of each bend are highly consistent. By changing the stop bar of different diameters, various bending radius conditions can be simulated, comprehensively examining the bending resistance of the flexible cable under different curvatures, greatly enhancing the test coverage and versatility of the equipment.

[0015] (4) The present invention further provides a photoelectric counter on the mounting plate, which can detect the movement cycle of the flip plate in a non-contact manner. Each time the flip plate passes through the sensing area, a signal is triggered, realizing the accurate accumulation of the number of bends. This provides quantifiable data support for evaluating the fatigue life of the flexible cable. This counting method has a fast response, high accuracy, and strong anti-interference ability. It is suitable for long-term automated testing and helps to realize the data-driven and intelligent management of the testing process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the drive device. Figure 4 This is a schematic diagram of the three-dimensional structure of the flip panel.

[0017] In the diagram: 1. Base; 2. Mounting plate; 3. Flip plate; 4. Drive device; 4-1. Drive motor; 4-2. Drive gear; 4-3. Transmission gear; 5. Protective cover; 6. Stop bar; 7. Magnet; 8. Photoelectric counter. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] Example 1: Combined with appendix Figures 1-3 A flexible ribbon cable bending test device includes a base 1, a mounting plate 2, a flipping plate 3, and a driving device 4. The base 1 serves as the fundamental support structure for the entire device, providing stable load-bearing capacity. The mounting plate 2 is fixedly connected to the base 1 and arranged vertically, providing a mounting reference surface for other functional components. A hinge axis is vertically arranged on the surface of the mounting plate 2. Two flipping plates 3 are symmetrically arranged, with their bottoms hinged to the hinge axis. Each flipping plate 3 has a clearance notch at the position corresponding to the hinge axis. The two flipping plates 3 can rotate relative to each other around the hinge axis, and their movement trajectory allows them to flip from an unfolded state to a mutually fitted state, forming a closed action. The clearance notch design allows the flipping plates 3 to rotate smoothly around the hinge axis, avoiding structural interference.

[0022] During the flexible cable bending test, tape can be used to fix both ends of the flexible cable under test to the surfaces of two flip plates 3. As the two flip plates 3 reciprocate around the hinge axis, the flexible cable undergoes periodic bending and stretching around the center line of the hinge axis, thus simulating repeated bending conditions in actual applications. Depending on the testing requirements, the flexible cable can be fixed to either the inner surface of the two flip plates 3 facing each other or the outer surface facing away from each other. When fixed to the inner surface, the flexible cable is subjected to compressive bending during the closing of the flip plates 3; when fixed to the outer surface, it is stretched and bent during the opening of the flip plates 3. Both methods are suitable for evaluating the bending resistance of flexible cables under different assembly conditions.

[0023] To achieve automated bending operations, a drive device 4 is also provided on the mounting plate 2 to drive the two flipping plates 3 to perform reciprocating flipping actions synchronously. Specifically, each flipping plate 3 has a toothed structure at its bottom, with the teeth distributed along an arc path and their center coinciding with the axis of the hinge shaft, ensuring coordinated movement during transmission.

[0024] As attached Figure 3 As shown, the driving device 4 includes a drive motor 4-1, a drive gear 4-2, and a transmission gear 4-3. The drive motor 4-1 is mounted on the side of the mounting plate 2 opposite to the flipping plate 3, and its output shaft passes through a through hole on the mounting plate 2 and extends to the front. The drive gear 4-2 is fixedly sleeved on the output shaft of the drive motor 4-1 and rotates synchronously with the output shaft. On the mounting plate 2, in the area above the drive gear 4-2, two transmission gears 4-3 are rotatably connected by a rotating shaft. These two transmission gears 4-3 are arranged side by side and axially offset, and both mesh with the drive gear 4-2. At the same time, each transmission gear 4-3 meshes with the gear tooth structure at the bottom of one of the flipping plates 3. When the drive motor 4-1 is started, the drive gear 4-2 rotates, driving the two transmission gears 4-3 to rotate synchronously in opposite directions, thereby driving the corresponding flipping plates 3 to open and close around the hinge axis. Due to the reasonable design of the transmission relationship, the two flipping plates 3 always maintain symmetrical flipping, realizing uniform and stable bending of the flexible wiring, and meeting the basic requirements of durability testing.

[0025] Example 2: Combined with appendix Figure 1A flexible cable bending test device differs from Embodiment 1 in that, based on Embodiment 1, a protective cover 5 is added to the mounting plate 2 corresponding to the areas where the drive gear 4-2 and transmission gear 4-3 are located. This protective cover 5 is made of metal or engineering plastic, has a box-like structure, and is fixed to the surface of the mounting plate 2 by screws or clips. The protective cover 5 covers the drive gear 4-2 and the two transmission gears 4-3 and their meshing areas, forming a closed or semi-closed space, effectively preventing external dust, debris, or other foreign objects from entering the gear meshing area. If foreign objects fall between the gears, it may cause increased transmission resistance or even jamming, affecting the continuity of the test, and in severe cases, may damage the motor or gears. Therefore, the presence of the protective cover 5 improves the operational reliability and service life of the transmission system and ensures the stability of the bending test process.

[0026] Example 3: Combined with appendix Figure 1 A flexible ribbon cable bending test device, based on Embodiment 1 or Embodiment 2, includes a stop rod detachably connected to the hinge shaft. The stop rod 6 is a cylindrical component extending axially along the hinge shaft, with its outer diameter selected according to testing standards or product specifications. Before the bending test, the flexible ribbon cable to be tested is wrapped around the outer circumference of the stop rod 6 from its center, ensuring it is in close contact with the surface of the stop rod 6. At this time, the stop rod 6 acts as a bending forming mandrel, limiting the minimum radius of curvature of the flexible ribbon cable during bending, ensuring consistent geometric conditions for each bend. By replacing the stop rod 6 with different diameters, bending radius conditions under various application scenarios can be simulated, thereby comprehensively evaluating the bending resistance of the flexible ribbon cable under different curvatures. The stop rod 6 and the hinge shaft are detachably connected via an interference fit, threaded connection, or quick-change clamping structure, facilitating rapid replacement and maintenance. This design enhances the adaptability and versatility of the test device.

[0027] Example 4: Combined with appendix Figure 4 A flexible ribbon cable bending test device is disclosed. Based on any one of the embodiments from Example 1 to Example 3, the inner surface of the flipping plate 3 is processed into a stepped surface structure. This stepped surface consists of a high-order region near one edge of the flipping plate 3 and a low-order region on the other side, wherein the low-order region is used to accommodate a magnet 7. The magnet 7 is fixed to the low-order region of the stepped surface of the flipping plate 3 by magnetic attraction, and reliable adsorption is achieved by utilizing the magnetic permeability of the flipping plate 3 body material or by an internal iron insert. During operation, after placing the flexible ribbon cable on the surface of the flipping plate 3, the magnet 7 is placed to press down on a portion of the ribbon cable, thus quickly fixing it without the need for tape or other auxiliary tools, improving clamping efficiency. The position of the magnet 7 can be flexibly adjusted according to the actual direction of the flexible ribbon cable to adapt to ribbon cable samples of different widths or shapes.

[0028] To avoid interfering with the flipping action, the height difference design of the step surfaces must ensure that the installation of magnet 7 does not affect the complete fit of the two flipping plates 3 in the closed state. Furthermore, it is particularly important to note that when installing magnet 7 on the inner surfaces of the two flipping plates 3, the magnets 7 on both sides must be staggered, i.e., not directly facing each other in the same axial position. Otherwise, during the process of the flipping plates 3 approaching closure, the two magnets 7 will generate a strong mutual attraction, which may cause the flexible ribbon cable to be accidentally pulled or detached from its original fixed position, affecting the accuracy of the test results and even causing damage to the ribbon cable. Therefore, staggered arrangement is a necessary measure to ensure the safety and effectiveness of the test.

[0029] Example 5: Combined with appendix Figure 1 A flexible ribbon cable bending test device, based on any one of embodiments one through four, further includes a photoelectric counter 8 mounted on the mounting plate 2. The photoelectric counter 8 is fixed to the mounting plate 2 near the movement path of one of the flip plates 3. When the two flip plates 3 unfold outward from their closed state to a predetermined angle, the edge of one of the flip plates 3 passes through the sensing area of ​​the photoelectric counter 8, blocking the light path or triggering a signal change, thereby generating a pulse signal. The control system records this signal, completing the counting of one bending cycle. By accumulating the number of triggers of the photoelectric counter 8, the actual number of bends completed by the flexible ribbon cable can be obtained, providing a quantitative basis for judging its fatigue life. This counting method is non-contact, fast-responding, and highly accurate, suitable for long-term continuous testing scenarios, and helps to achieve data-driven management of the testing process.

[0030] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A flexible flat cable bending test apparatus characterized by comprising: include: Base (1); Mounting plate (2) is vertically mounted on base (1); The hinge shaft is fixedly connected perpendicularly to the surface of the mounting plate (2); The flip plate (3) consists of two symmetrically arranged flip plates (3). The bottom of the two flip plates (3) is hinged to the hinge axis, and the two flip plates (3) can be flipped around the hinge axis to the corresponding fitting state. The two flip plates (3) are provided with clearance notches at the positions corresponding to the hinge axis. The flip plate (3) is used to fix the two ends of the flexible ribbon cable and drive the flexible ribbon cable to bend around the hinge axis. The drive unit (4) is mounted on the mounting plate (2); it is used to drive the two flip plates (3) to flip around the hinge axis.

2. The flexible flat cable bending test apparatus according to claim 1, wherein The bottom of the flip plate (3) is provided with wheel teeth, and the driving device (4) includes: The drive motor (4-1) is installed on the side of the mounting plate (2) away from the flip plate (3), and the output shaft of the drive motor (4-1) moves through the mounting plate (2). The drive gear (4-2) is mounted on the output shaft of the drive motor (4-1); The transmission gears (4-3) are two gears that are rotatably connected to the mounting plate (2). The two transmission gears (4-3) mesh with the drive gears (4-2) and respectively mesh with the teeth of the two flip plates (3).

3. The flexible cable bending test device as described in claim 2, characterized in that: The mounting plate (2) is equipped with a protective cover (5) at the position corresponding to the drive gear (4-2) and the transmission gear (4-3).

4. The flexible cable bending test device as described in claim 1, characterized in that: The hinge shaft is detachably connected to a stop bar (6).

5. The flexible cable bending test device as described in claim 1, characterized in that: The inner surface of the flip plate (3) is a stepped surface, and a magnet (7) for pressing the flexible ribbon cable is magnetically connected to the stepped surface.

6. The flexible cable bending test device as described in claim 1, characterized in that: A photoelectric counter (8) is installed on the mounting plate (2).

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