Cutting tool for diffusion film

Abstract

The utility model provides a diffusion film cutting tool which comprises a back plate, a cutting blade and a film pressing contact, the cutting blade and the film pressing contact are installed on the back plate, the cutting blade comprises an outer contour blade and a plurality of inner ring blades located within the range of the outer contour blade, and the film pressing contact is selectively arranged between every two inner ring blades.

Description

Technical Field

[0001] The utility model relates to the field of diffusion film production, and particularly to a cutting tool for diffusion films. Background Art

[0002] Diffusion films are widely used in optical devices and display screens. Their main function is to uniformly disperse optical fibers to improve the display effect. However, due to the fragility of the diffusion film material, problems such as breakage and uneven edges are likely to occur during the cutting process. These problems of breakage and uneven edges are not only related to the sharpness of the cutting tool, but also related to the unstable position of the diffusion film during cutting, resulting in offset cutting. Therefore, in order to improve the cutting accuracy and cutting efficiency, a cutting tool for diffusion films is proposed. Summary of the Utility Model

[0003] The utility model aims at the existing problems and proposes a cutting tool for diffusion films.

[0004] The utility model provides a cutting tool for diffusion films, which includes a back plate, a cutting blade and a film pressing contact point installed on the back plate. The cutting blade includes an outer contour blade and a number of inner ring blades within the range of the outer contour blade. Among them, the film pressing contact points are selectively arranged between every two inner ring blades.

[0005] Preferably, the film pressing contact point includes a contact cavity and a contact head installed inside the contact cavity.

[0006] Preferably, the contact head is telescopically installed inside the contact cavity through a spring. Among them, the end face of the contact head is higher than the end face of the contact cavity.

[0007] Preferably, the telescopic stroke of the contact head during the film pressing operation is less than the distance between the end face of the contact head and the end face of the contact cavity.

[0008] Preferably, the inner ring blade is specifically a hollow annular blade, and the hollow part of the hollow annular blade is filled with foam cotton.

[0009] Preferably, the end face of the foam cotton is higher than the end face of the inner ring blade.

[0010] Preferably, the blade inclination angle of the cutting blade is 30° - 45°.

[0011] Preferably, a number of inner ring blades include two rows of symmetrically arranged inner ring blades, and every two inner ring blades in each row of inner ring blades are distributed at a predetermined interval.

[0012] Preferably, the film pressing contact points are selectively arranged on each row of inner ring blades, and the film pressing contact points are also arranged between the two rows of inner ring blades.

[0013] Preferably, a threaded hole for installing the contact cavity is provided at the position of the back plate corresponding to the film pressing point, and a threaded joint is provided on one side of the back plate corresponding to the threaded hole for installing the contact cavity.

[0014] The beneficial effects of the cutting tool for diffusion film and the cutting tool for diffusion film provided by the present utility model are as follows:

[0015] The cutting tool for diffusion film can be detachably applied to the film cutting device. In view of the diversity of current diffusion films, when the inner ring blade is required for hole cutting of the diffusion film, a film pressing contact can be selectively set near the hole position, so that the raw material film can be compacted and fixed during the inner ring hole cutting, avoiding problems such as uneven edges and breakage caused by local arching or displacement of the raw material film during the inner ring cutting, and improving the cutting accuracy and cutting efficiency. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a cutting tool for diffusion film provided by the present utility model;

[0017] Figure 2 is a schematic structural relationship diagram of the inner ring blade and the foam cotton;

[0018] Figure 3 is a schematic structural relationship diagram of the contact head and the contact cavity. Detailed Embodiments

[0019] The following further describes the cutting tool for diffusion film provided by the present utility model with reference to the drawings. It should be noted that only one optimal technical solution is used to elaborate the technical solution and design principle of the present utility model in detail below.

[0020] Throughout the description of the present utility model, it should be noted that for orientation terms, such as terms "center", "horizontal", "vertical", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating orientation and position relationships are based on the orientations or position relationships shown in the drawings or the common terms used by those skilled in the art, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model

[0021] First, refer to Figure 1, the present utility model provides a cutting tool for a diffusion film. The cutting tool for the diffusion film is detachably mounted on a film cutting device and is used to cut a raw material film into a diffusion film with a target shape or target creases. Among them, the cutting tool includes a back plate 1, a cutting blade mounted on the back plate, and a film pressing contact 3. The cutting blade includes an outer contour blade 4, a crease blade 5, and a plurality of inner ring blades 2 located within the range of the outer contour blade. Among them, the film pressing contact 2 is selectively provided between every two inner ring blades. In this embodiment, the shape of the outer contour blade 4 is adapted to the outer contour of the target diffusion film. The cutting positions of the eighteen inner ring blades 2 correspond to the light emitting hole positions of the target diffusion film, and the crease blade 5 corresponds to the expected crease position of the target diffusion film. Among them, the film pressing contact 3 is ensured to be provided between every two inner ring blades 2 or on one side of every two inner ring blades, so as to tightly press the raw material film during cutting to prevent uneven cutting caused by bulging or displacement of the raw material film during cutting.

[0022] Among them, referring to Figure 3 , the film pressing contact 3 includes a contact cavity 32 and a contact head 31 mounted in the contact cavity body 32. The contact head 31 is movably mounted in the contact cavity 32 and fixedly presses the diffusion film in a movable manner to prevent the raw material film from being directly damaged by rigid force.

[0023] Continue to refer to Figure 3 , the way to realize the movable mounting of the contact head 31 and the contact cavity 32 in this embodiment is: the contact head 31 is telescopically mounted in the contact cavity 32 through a spring 33. Among them, the contact head 31 and the side of the contact cavity 32 close to the spring 33 both extend convex columns that are in interference fit with the hollow part of the spring. Among them, the end face of the contact head 31 is higher than the end face of the contact cavity 32. When the cutting tool presses down on the raw material film, the contact head 31 first touches the raw material film. When continuing to press down, the contact head 31 gradually presses the raw material film under the action of elastic force until the cutting tool stops pressing down. It should be noted that the telescopic stroke of the contact head 31 during the film pressing operation is less than the distance between the end face of the contact head 31 and the end face of the contact cavity 32, that is, the pressing down stroke of the cutting tool is less than the distance between the two end faces, so as to prevent the contact cavity 32 from damaging the raw material film due to excessive pressing down.

[0024] Preferably, referring to Figure 2 , the inner ring blade 2 is specifically a hollow annular blade, and the hollow part of the hollow annular blade is filled with foam cotton 22. The function of the foam cotton 22 is similar to that of the contact, and it also plays a role in tightly pressing the raw material film. Moreover, the pressing effect of the foam cotton 22 can further improve the cutting effect and the yield rate. Because during the cutting process of the raw material film, the raw material film corresponding to the hole position of the annular blade may bulge and cannot be pressed by the film pressing contact, so it is necessary to add a film pressing action near the blade.

[0025] Preferably, the end face of the foam cotton is higher than the end face of the inner ring blade. In this embodiment, the end face of the foam cotton is an arc surface, and the end face of the foam cotton is 0.2 mm to 0.5 mm higher than the end face of the inner ring blade. Additionally, in this embodiment, the end face of the foam surface is lower than the end face of the contact head of the film pressing contact. That is, during the film pressing process, first, the film pressing contact contacts the raw material film first and presses the whole raw material film tightly, then the foam cotton inside the inner ring blade presses it tightly, and finally cutting is performed. Due to the characteristics of the foam cotton, when the foam cotton is squeezed, it will be compressed into the cavity of the inner ring blade, achieving the pressing effect without hindering cutting.

[0026] Preferably, the inclination angles of the outer contour blade and the blade edge 21 of the inner ring blade in the cutting blade are 30° to 45°, and the creasing blade 5 does not include a blade edge.

[0027] In some embodiments, several inner ring blades include two rows of symmetrically arranged inner ring blades, and every two inner ring blades in each row of inner ring blades are distributed at a predetermined interval.

[0028] In some embodiments, the film pressing contacts are selectively arranged on each row of inner ring blades, and film pressing contacts are also arranged between the two rows of inner ring blades.

[0029] Preferably, the back plate 1 is provided with a threaded hole for installing the contact cavity 3 at the position corresponding to the installation of the film pressing contact. The contact cavity 3 is provided with a threaded joint 34 on one side of the back plate corresponding to the threaded hole. This detachable installation method of the film pressing contact can flexibly adjust the position according to the shape of the film in cooperation with the cutting blade to achieve the best film pressing effect and improve versatility.

[0030] In view of the diversity of the current diffusion films, the present utility model can selectively set film pressing contacts near the hole positions when the inner ring blade of the diffusion film is required to cut the hole positions, so that the raw material film can be compacted and fixed during the inner ring hole position cutting, avoiding problems such as uneven edges and breakage caused by local arching or displacement of the raw material film during the inner ring cutting, and improving the cutting accuracy and cutting efficiency.

[0031] The above are only the preferred embodiments of the present utility model. It should be noted that the above preferred embodiments should not be regarded as a limitation of the present utility model. The protection scope of the present utility model should be subject to the scope defined by the claims. For those of ordinary skill in the art in this technical field, without departing from the spirit and scope of the present utility model, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present utility model.

Claims

1. A cutting tool for a diffusion film, characterized in that: It comprises a back plate, a cutting blade and a film pressing contact mounted on the back plate, wherein the cutting blade comprises an outer contour blade and a plurality of inner circle blades within the range of the outer contour blade, wherein the film pressing contact is arranged between every two inner circle blades.

2. A cutting tool for a diffusion film according to claim 1, characterized in that: The pressed film contact comprises a contact cavity and a contact installed in the contact cavity.

3. A cutting tool for a diffusion film according to claim 2, characterized in that: The contact is telescopically mounted in the contact cavity through a spring, wherein the end surface of the contact is higher than the end surface of the contact cavity.

4. A cutting tool for a diffusion film according to claim 3, characterized in that: The telescopic stroke of the contact during the film pressing operation is smaller than the distance between the end surface of the contact and the end surface of the contact cavity.

5. The cutting tool for a diffusion film according to claim 1, characterized in that: The inner ring blade is specifically a hollow annular blade, and the hollow part of the hollow annular blade is filled with foam cotton.

6. The cutting tool for a diffusion film according to claim 5, characterized in that: The end surface of the foam cotton is higher than the end surface of the inner ring blade.

7. The cutting tool for a diffusion film according to claim 1, characterized in that: The cutting blade has a cutting edge inclination angle of 30° to 45°.

8. The cutting tool for a diffusion film according to claim 1, characterized in that: The plurality of inner ring blades include two rows of symmetrically arranged inner ring blades, and every two inner ring blades in each row of inner ring blades are distributed at a predetermined interval.

9. The cutting tool for diffusion film according to claim 8, characterized in that: Each row of inner ring blades is provided with the above-mentioned film pressing contact point, and a film pressing contact point is also provided between two rows of inner ring blades.

10. The cutting tool for diffusion film according to claim 2, characterized in that: The back plate is provided with a threaded hole for installing the contact cavity at a position corresponding to the installation of the film pressing point, and the contact cavity is installed on one side of the back plate and is provided with a threaded joint corresponding to the threaded hole.

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