Film clamping mechanism and feeding device

Abstract

The utility model discloses a film clamping mechanism and a feeding device. The film clamping mechanism comprises a fixed seat, a driving piece and a connecting rod structure; a clamping part is arranged at the bottom of the fixed seat; the driving part is fixed on the fixed seat and is provided with a telescopic rod, and the telescopic rod is fixedly connected with a connecting rod base; the connecting rod structure comprises a first connecting rod and a second connecting rod; the first end of the first connecting rod is hinged with the fixed seat, and the second end is hinged with the middle part of the second connecting rod; the end, away from the clamping part, of the second connecting rod is hinged to the connecting rod base, and the other end of the second connecting rod is provided with a finger clamping part used for being matched with the clamping part to clamp the release film. According to the film clamping mechanism and the feeding device provided by the utility model, the clamping part at the bottom of the fixed seat is matched with the clamping finger part of the second connecting rod, so that a stable clamping point is formed, and the release film is effectively prevented from shifting or loosening in the feeding process.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic component packaging, and particularly relates to a film clamping mechanism and a feeding device. Background Technique

[0002] In modern electronic devices, the packaging technology of chips is particularly important. The packaging technology can not only protect the chips from the influence of the external environment, but also enhance the mechanical strength of the chips, improve their heat dissipation performance, and ensure the reliability and stability of the chips during use. In the existing chip packaging technology, the compression molding method is widely used because it can achieve high-precision packaging effects.

[0003] The basic principle of the compression molding method is that in a packaging device, resin particles are supplied to a molding die and heated to melt the resin particles into molten resin. Then, the molding die is closed, and the chips on the substrate are immersed in the molten resin. Pressure is applied to the molten resin through the molding die to harden the molten resin to form hardened resin, thereby performing resin packaging on the chips on the substrate.

[0004] The resin particles are usually supplied by a feeding device to transport the resin particles carried on a release film into the cavity of the molding die. However, during the feeding process, if the release film is displaced or loosened, it will affect the uniformity of the distribution of the resin particles. The uneven distribution of the resin particles caused by the displacement and relaxation of the release film will cause the molten resin to be unevenly distributed in the molding die during the packaging process, thereby causing packaging defects.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a new solution. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a film clamping mechanism and a feeding device, which can stably clamp the release film during the feeding process and avoid the displacement and relaxation of the release film.

[0007] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0008] In the first aspect, the utility model provides a film clamping mechanism, which includes:

[0009] A fixed seat, the bottom of which is provided with a clamping part;

[0010] A driving member, fixed on the fixed seat, the driving member has a telescopic rod, and a connecting rod base is fixedly connected to the telescopic rod;

[0011] The connecting rod structure comprises a first connecting rod and a second connecting rod; the first end of the first connecting rod is hinged to a fixing seat, and the second end is hinged to a middle part of the second connecting rod; one end of the second connecting rod away from the clamping part is hinged to the connecting rod base, and the other end of the second connecting rod is provided with a clamping finger part for cooperating with the clamping part to clamp the release film;

[0012] When the telescopic rod is extended, the second end of the first connecting rod can rotate toward the clamping portion to drive the second connecting rod to approach the clamping portion; and the second connecting rod can rotate around the second end of the first connecting rod to drive the clamping finger portion to approach the clamping portion.

[0013] In one or more embodiments, a limiting groove is provided at one end of the second connecting rod away from the clamping portion, and a pin is fixedly provided on the connecting rod base. The pin is hinged in the limiting groove and can slide along the limiting groove.

[0014] In one or more embodiments, a connecting portion is formed on the middle portion of the second connecting rod extending toward a side away from the clamping finger portion, and the limiting groove is provided on the connecting portion, and the limiting groove extends along an extending direction of the connecting portion.

[0015] In one or more embodiments, the clamping finger portion is inclined relative to the connecting portion toward a side away from the clamping portion.

[0016] In one or more embodiments, an elastic clip is provided on one side of the clamping finger portion close to the clamping portion.

[0017] In one or more embodiments, the connecting rod structure further includes a third connecting rod, one end of the third connecting rod is hinged to the connecting rod base, and the other end of the third connecting rod is hinged to the middle portion of the first connecting rod.

[0018] In one or more embodiments, the third connecting rod is configured such that: when the telescopic rod is at a first extended length, the angle between the third connecting rod and the telescopic rod is an obtuse angle; when the telescopic rod is at a second extended length, the angle between the third connecting rod and the telescopic rod is an acute angle.

[0019] In one or more embodiments, when the telescopic rod is at a first extended length, the clamping finger portion is away from the clamping portion; when the telescopic rod is at a second extended length, the clamping finger portion is close to the clamping portion.

[0020] In one or more embodiments, the film clamping mechanism includes two connecting rod structures, and the two connecting rod structures are respectively arranged on both sides of the connecting rod base.

[0021] In a second aspect, the utility model provides a feeding device, which comprises at least two oppositely arranged film clamping mechanisms as described above.

[0022] Compared with the prior art, the film clamping mechanism and the loading device provided by the present utility model form a stable clamping point through the cooperation of the clamping part at the bottom of the fixed seat and the finger part of the second connecting rod, effectively avoiding the displacement or relaxation of the release film during the loading process. Through the coordinated movement of the connecting rod structure, the finger part can stably clamp the release film, keeping it flat and fixed during the loading and encapsulation processes. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a side view of the film clamping mechanism in a use state in an embodiment of the present utility model;

[0025] Figure 2 For Figure 1 a side view of the shown clamping member in another use state;

[0026] Figure 3 For Figure 1 a side view of the shown clamping member in the state of clamping the release film;

[0027] Figure 4 It is a rear view of the film clamping mechanism in an embodiment of the present utility model;

[0028] Figure 5 It is a structural schematic diagram of the loading device mechanism in an embodiment of the present utility model.

[0029] Main reference numerals description:

[0030] 100 - film clamping mechanism, 1 - fixed seat, 11 - clamping part, 2 - driving member, 21 - telescopic rod, 22 - connecting rod base, 23 - pin shaft, 3 - connecting rod structure, 31 - first connecting rod, 32 - second connecting rod, 321 - middle part, 322 - finger part, 323 - limiting groove, 324 - connecting part, 33 - third connecting rod, 331 - first hinge point, 332 - second hinge point, 34 - elastic clip, 4 - release film, 200 - loading device. Detailed Embodiments

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] Unless otherwise clearly stated, throughout the specification and claims, the term "comprise" or its variations such as "comprises" or "including" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0033] With the development of modern electronic devices, the importance of chip packaging technology in ensuring chip performance and stability has become increasingly prominent. However, in existing chip packaging technologies, especially in the compression molding method, there are significant deficiencies in the supply mode of resin particles. Generally, resin particles are transported to the cavity of the molding die through a feeding device carried on a release film. However, during this process, the release film is prone to displacement or loosening, resulting in uneven distribution of resin particles. This uneven distribution will cause uneven diffusion of the molten resin in the molding die during the packaging process, and further lead to packaging defects such as uneven thickness of the resin packaging layer, appearance of bubbles or voids. These defects seriously affect the quality and reliability of chip packaging.

[0034] In view of the above problems in the prior art, the present utility model proposes a film clamping mechanism, aiming to solve the problem of displacement and relaxation of the release film during the feeding process through stable clamping of the release film. The technical idea of the present utility model is to design a film clamping mechanism with a clamping part, a driving part and a connecting rod structure, and use the driving part to drive the connecting rod structure to move, so as to achieve stable clamping and convenient release of the release film.

[0035] In the specific implementation process, the present utility model realizes this technical idea through the following aspects: First, by setting a clamping part and a finger part, the release film can be kept stable during the feeding process; Second, a driving part and a connecting rod structure are adopted, and the driving part drives the connecting rod structure to move through the telescopic action of the driving part, realizing the relative movement of the clamping part and the finger part, so as to realize the clamping and release of the release film. Through this design, it is ensured that the resin particles are evenly distributed during the feeding process, and the generation of packaging defects can be reduced.

[0036] Please refer to Figures 1 to 3As shown in the figure, the film clamping mechanism 100 in an embodiment of the present utility model includes: a fixed seat 1, a driving member 2, and a connecting rod structure 3. A clamping portion 11 is provided at the bottom of the fixed seat 1. The driving member 2 is fixed on the fixed seat 1. The driving member 2 has a telescopic rod 21, and a connecting rod base 22 is fixedly connected to the telescopic rod 21. The connecting rod structure 3 includes a first connecting rod 31 and a second connecting rod 32. The first end of the first connecting rod 31 is hinged to the fixed seat 1, and the second end is hinged to the middle portion 321 of the second connecting rod 32. One end of the second connecting rod 32 away from the clamping portion 11 is hinged to the connecting rod base 22, and the other end is provided with a finger portion 322 for cooperating with the clamping portion 11 to clamp the release film 4.

[0037] Among them, when the telescopic rod 21 extends, it can make the second end of the first connecting rod 31 rotate towards the direction close to the clamping portion 11 to drive the second connecting rod 32 close to the clamping portion 11. And the second connecting rod 32 can rotate around the second end of the first connecting rod 31 to drive the finger portion 322 close to the clamping portion 11, so that the release film 4 can be stably clamped between the finger portion 322 and the clamping portion 11, avoiding loosening of the release film 4.

[0038] When the telescopic rod 21 shortens, it can make the second end of the first connecting rod 31 rotate away from the clamping portion 11 to drive the second connecting rod 32 away from the clamping portion 11. And the second connecting rod 32 can rotate around the second end of the first connecting rod 31 to drive the finger portion 322 away from the clamping portion 11 to release the release film 4 clamped between the finger portion 322 and the clamping portion 11.

[0039] The fixed seat 1 is the basic structure of the film clamping mechanism 100. A clamping portion 11 is provided at its bottom, which is used to provide stable support and basic clamping function. The material of the fixed seat 1 can be selected as high-strength metal or engineering plastic to ensure sufficient rigidity and stability during the entire clamping process. The design of the clamping portion 11 can precisely match the finger portion 322 to ensure that the release film 4 can be firmly clamped and avoid loosening.

[0040] The connecting rod base 22 is fixedly connected to the telescopic rod 21 and moves with the telescopic movement of the telescopic rod 21. The connecting rod base 22, as the connection point between the driving member 2 and the connecting rod structure 3, its movement directly affects the position change of the second connecting rod 32. The design of the connecting rod base 22 needs to consider the movement range and torque transmission of the telescopic rod 21 to ensure the stable operation of the entire connecting rod structure 3. The driving member 2 can be a cylinder, a hydraulic cylinder, an electric push rod, a motor, etc.

[0041] The main function of the first link 31 is to transfer the movement of the telescopic rod 21 to the second link 32. The design of its hinge points needs to ensure that the link can rotate smoothly to achieve smooth movement transfer. The second link 32 realizes the relative movement between the finger part 322 and the clamping part 11 through the movement of the telescopic rod 21 and the first link 31. The finger part 322 is located at the end of the second link 32 and is used to cooperate with the clamping part 11 to clamp the release film 4.

[0042] In an exemplary embodiment, please refer to Figures 1 to 3 As shown, a limiting groove 323 is provided at one end of the second link 32 away from the clamping part 11. A pin shaft 23 is fixedly provided on the link base 22, and the pin shaft 23 is hinged in the limiting groove 323 and can slide along the limiting groove 323.

[0043] The limiting groove 323 is provided at one end of the second link 32 away from the clamping part 11. Its main function is to provide a certain displacement space for the second link 32, so that the second link 32 can flexibly adjust its position during movement. Through the setting of the limiting groove 323, the second link 32 can smoothly switch between approaching the clamping part 11 and moving away from the clamping part 11. The length and shape design of the limiting groove 323 need to be optimized according to specific movement requirements to ensure that the second link 32 can obtain sufficient degrees of freedom during movement.

[0044] The function of the pin shaft 23 is to transfer the movement of the link base 22 to the second link 32 and realize the displacement of the second link 32 through the sliding in the limiting groove 323. When the driving member 2 drives the link base 22 to move, the pin shaft 23 slides in the limiting groove 323, enabling the second link 32 to obtain a certain degree of displacement freedom. The design of the pin shaft 23 needs to ensure that it can slide smoothly in the limiting groove 323, and high-strength, low-friction materials such as high-strength steel or alloys coated with low-friction materials can be used for manufacturing.

[0045] Specifically, please refer to Figure 1 and Figure 3 As shown, a connecting portion 324 extends from the middle portion 321 of the second link 32 toward the side away from the finger portion 322. The limiting groove 323 is provided on the connecting portion 324, and the limiting groove 323 extends along the extending direction of the connecting portion 324. The limiting groove 323 extending along the extending direction of the connecting portion 324 enables the limiting groove 323 to make full use of the length of the connecting portion 324 and provide sufficient sliding space. The extending direction of the limiting groove 323 is consistent with the extending direction of the connecting portion 324, ensuring that the pin shaft 23 can maintain smooth and continuous movement during sliding and avoiding jamming.

[0046] The finger clamping part 322 is inclined relative to the connecting part 324 towards the side away from the clamping part 11, and a certain angle is formed between the finger clamping part 322 and the connecting part 324. The existence of the angle enables the finger clamping part 322 to better adapt to different film tensions and position changes when clamping and releasing the release film 4. Specifically, when the finger clamping part 322 is inclined, the direction and magnitude of the clamping force can be controlled by adjusting the size of the angle, thereby improving the clamping effect of the release film 4.

[0047] Further, please refer to Figure 1 and Figure 4 As shown, an elastic clip 34 is provided on the side of the finger clamping part 322 close to the clamping part 11. The elastic clip 34 is a component that cooperates with the clamping part 11 to achieve film clamping. The elastic clip 34 can be made of materials with high elasticity and wear resistance, such as spring steel or engineering plastics. The material selection needs to ensure that the elastic clip 34 can maintain good elastic deformation ability and durability during frequent use. The shape design of the elastic clip 34 needs to be optimized according to the characteristics of the release film 4 and the structure of the clamping part 11 to ensure that it can closely fit the release film 4 during the clamping process and avoid film sliding or falling off.

[0048] When the telescopic rod 21 extends to a predetermined length, it can drive the finger clamping part 322 close to the clamping part 11 and make the elastic clip 34 abut against the clamping part 11 to achieve a stable clamping function. The elastic clip 34 has a certain elastic deformation function and can better fit the surface of the film when clamping the release film 4. The elastic deformation ability of the elastic clip 34 enables it to automatically adjust the adhesion force during the clamping process to adapt to release films 4 of different thicknesses and materials. This design not only improves the clamping effect but also effectively reduces film damage.

[0049] In an exemplary embodiment, please refer to Figures 1 to 3 As shown, the link structure 3 further includes a third link 33. One end of the third link 33 is hinged to the link base 22, and the other end is hinged to the middle of the first link 31. The third link 33 can transmit the movement of the link base 22 to the first link 31, causing it to rotate and drive the second link 32 to move. By providing a hinge point in the middle of the first link 31, the first link 31 can achieve smooth rotation under the drive of the third link 33. This design enables the first link 31 to effectively drive the second link 32 to approach or move away from the clamping part 11 when receiving the movement transmission from the link base 22.

[0050] Specifically, please refer to Figures 1 to 3 As shown, the third link 33 is configured such that when the telescopic rod 21 is at the first extended length, the angle between the third link 33 and the telescopic rod 21 is an obtuse angle ( Figure 1 angle α inFigure 3 When the telescopic rod 21 is at the first extended length, the finger portion 322 is away from the clamping portion 11; when the telescopic rod 21 is at the second extended length, the finger portion 322 is close to the clamping portion 11.

[0051] When the telescopic rod 21 is at the first extended length, the entire film clamping mechanism 100 is in an initial state. In this state, the length of the telescopic rod 21 is shorter, and the finger portion 322 is away from the clamping portion 11. At this time, a relatively large distance is maintained between the finger portion 322 and the clamping portion 11, so that the release film 4 can be freely placed or adjusted. When the telescopic rod 21 extends to the second extended length, the finger portion 322 is close to the clamping portion 11, realizing the clamping of the release film 4. In this state, the length of the telescopic rod 21 reaches the maximum, and each component in the link structure 3 moves coordinately to ensure that the finger portion 322 is in close fit with the clamping portion 11.

[0052] When the telescopic rod 21 is at the first extended length (initial state, the finger portion 322 is in the Figure 1 open state shown), the angle between the third link 33 and the telescopic rod 21 is an obtuse angle. This means that the angle formed between the line connecting the two hinge points of the third link 33 and the axis of the telescopic rod 21 is greater than 90 degrees. In this state, the height of the hinge point (the first hinge point 331) of the third link 33 and the link base 22 is higher than the height of the hinge point (the second hinge point 332) of the third link 33 and the first link 31. At this time, the finger portion 322 is away from the clamping portion 11, and the release film 4 can be freely placed or adjusted.

[0053] As the telescopic rod 21 extends, the angle between the third link 33 and the telescopic rod 21 begins to decrease. Since the distance between the first hinge point 331 and the second hinge point 332 is constant, the extension of the telescopic rod 21 causes the height of the first hinge point 331 to gradually decrease. When the height of the first hinge point 331 drops to the same level as the second hinge point 332 (as shown in Figure 2 ), the angle between the third link 33 and the telescopic rod 21 becomes a right angle. In this process, the third link 33 pushes the first link 31 to rotate towards the direction close to the clamping portion 11, driving the second link 32 to also move towards the clamping portion 11. The finger portion 322 gradually approaches the clamping portion 11, preparing for the subsequent clamping action.

[0054] As the telescopic rod 21 continues to extend, the angle between the third link 33 and the telescopic rod 21 further decreases and becomes an acute angle (as shown in Figure 3As shown). During this process, the height of the first hinge point 331 continues to drop and is lower than the height of the second hinge point 332. Since the third link 33 maintains a constant distance from the hinge point of the first link 31, the third link 33 will pull the first link 31 to rotate in a direction away from the clamping portion 11. This movement drives the second link 32 to move in a direction away from the clamping portion 11. During this process, the clamping finger portion 322 continues to approach the clamping portion 11 to clamp the release film 4. The movement of the second link 32 away from the clamping portion 11 not only causes the clamping finger portion 322 to clamp the release film 4, but also exerts an outward pulling effect on the release film 4. This outward pulling effect further tensions the release film 4 to ensure that the surface of the release film 4 is flat. This tensioning effect is conducive to the uniform distribution of the resin material and avoids uneven distribution due to the relaxation of the release film 4.

[0055] In an exemplary embodiment, please refer to Figure 4 As shown, in the film clamping mechanism 100, in order to ensure the stability and symmetry of the clamping process, a double connecting rod structure is designed. The two connecting rod structures 3 are respectively arranged on both sides of the connecting rod base 22. This symmetrical layout can balance the forces and avoid uneven clamping and structural deformation caused by unilateral force. Each connecting rod structure 3 can independently complete its movement process, including the pushing of the third connecting rod 33, the rotation of the first connecting rod 31, and the clamping action of the second connecting rod 32.

[0056] The connecting rod base 22 serves as the common fulcrum of the two connecting rod structures 3 and plays the role of transmitting power and supporting the connecting rod structures 3. Due to the symmetry of the two connecting rod structures 3, the movement of the telescopic rod 21 can be evenly transmitted to the connecting rod structures 3 on both sides, thereby ensuring that the release film 4 is subjected to balanced force during the clamping process, avoiding deformation or damage of the film material due to uneven force.

[0057] The driving member 2 (such as the telescopic rod 21) is preferably located at the center of the connecting rod base 22, and drives the two connecting rod structures 3 simultaneously through its telescopic action. The design of the driving member 2 ensures that its telescopic force can be evenly transmitted to the two connecting rod structures 3 to achieve synchronous movement.

[0058] Please refer to Figure 5 As shown, in one embodiment of the present invention, a feeding device 200 is further provided, which includes at least two oppositely arranged aforementioned film clamping mechanisms 100. The two film clamping mechanisms 100 can clamp the two side edges of the release film 4 respectively, and through symmetrical and uniform clamping force, the release film 4 can be kept stable and flat during the entire feeding process.

[0059] Before the feeding device 200 is started, the two film clamping mechanisms 100 are in an initial state. At this time, the telescopic rod 21 is at the first extended length, the finger part 322 is away from the clamping part 11, and the release film 4 can be freely placed or adjusted. After the feeding device 200 is started, the driving member 2 (telescopic rod 21) begins to extend. As the telescopic rod 21 extends, the angle between the third connecting rod 33 and the telescopic rod 21 in the connecting rod structure 3 gradually becomes smaller, and the finger part 322 gradually approaches the clamping part 11. Finally, the finger part 322 is close to the clamping part 11 to achieve stable clamping of the release film 4.

[0060] In the clamped state, the release film 4 is transported by the transport system of the feeding device 200. The two film clamping mechanisms 100 ensure the smoothness and stability of the release film 4 during the transmission process through symmetric and uniform clamping forces, avoiding displacement or slack. When the transport reaches the destination (such as the cavity of the forming die of the encapsulation device), the driving member 2 (telescopic rod 21) begins to shorten, and the finger part 322 gradually moves away from the clamping part 11 to release the release film 4. The release film 4 is stably transported to the predetermined position to complete the feeding process.

[0061] In summary, the film clamping mechanism and the feeding device provided by the present utility model form a stable clamping point through the cooperation of the clamping part at the bottom of the fixed seat and the finger part of the second connecting rod, effectively avoiding the displacement or slack of the release film during the feeding process. Through the coordinated movement of the connecting rod structure, the finger part can stably clamp the release film, keeping it flat and fixed during the feeding and encapsulation processes.

[0062] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0063] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and 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.

Claims

1. A membrane clamping mechanism, characterized in that: include: A fixing seat, the bottom of which is provided with a clamping portion; A driving member is fixed on the fixing seat, wherein the driving member has a retractable telescopic rod, and a connecting rod base is fixedly connected to the telescopic rod; The connecting rod structure comprises a first connecting rod and a second connecting rod; the first end of the first connecting rod is hinged to a fixing seat, and the second end is hinged to a middle part of the second connecting rod; one end of the second connecting rod away from the clamping part is hinged to the connecting rod base, and the other end of the second connecting rod is provided with a clamping finger part for cooperating with the clamping part to clamp the release film; When the telescopic rod is extended, the second end of the first connecting rod can rotate toward the clamping portion to drive the second connecting rod to approach the clamping portion; and the second connecting rod can rotate around the second end of the first connecting rod to drive the clamping finger portion to approach the clamping portion.

2. The film clamping mechanism according to claim 1, characterized in that: A limiting groove is provided at one end of the second connecting rod away from the clamping portion, and a pin is fixedly provided on the connecting rod base. The pin is hinged in the limiting groove and can slide along the limiting groove.

3. The film clamping mechanism according to claim 2, characterized in that: A connecting portion is formed by extending the middle portion of the second connecting rod toward a side away from the clamping finger portion, and the limiting groove is arranged on the connecting portion, and the limiting groove extends along an extending direction of the connecting portion.

4. The film clamping mechanism according to claim 3, characterized in that: The clamping finger portion is inclined relative to the connecting portion toward a side away from the clamping portion.

5. The film clamping mechanism according to claim 4, characterized in that: An elastic clip is provided on one side of the clamping finger portion close to the clamping portion.

6. The film clamping mechanism according to claim 1, characterized in that: The connecting rod structure also includes a third connecting rod, one end of which is hinged to the connecting rod base, and the other end of which is hinged to the middle part of the first connecting rod.

7. The film clamping mechanism according to claim 6, characterized in that: The third link is configured as follows: When the telescopic rod is at a first extension length, the angle between the third connecting rod and the telescopic rod is an obtuse angle; When the telescopic rod is at the second extension length, the angle between the third connecting rod and the telescopic rod is an acute angle.

8. The film clamping mechanism according to claim 7, characterized in that: When the telescopic rod is at a first extended length, the clamping finger portion is away from the clamping portion; When the telescopic rod is at the second extended length, the clamping finger portion is close to the clamping portion.

9. The film clamping mechanism according to any one of claims 1 to 8, characterized in that: The film clamping mechanism comprises two connecting rod structures, and the two connecting rod structures are respectively arranged on both sides of the connecting rod base.

10. A feeding device, characterized in that: The invention comprises at least two oppositely arranged film clamping mechanisms as claimed in any one of claims 1 to 9.

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