TWM632148U - Ratchet for COF carrier tape conveying - Google Patents

Abstract

The invention discloses a ratchet for COF carrier tape conveying and a method for using the same. The ratchet for COF carrier tape conveying comprises: a ratchet main body is cylindrical, and the left and right sides of the surface of the ratchet main body are respectively provided with a plurality of first positioning teeth and a plurality of second Positioning teeth, a plurality of first positioning teeth and a plurality of second positioning teeth are arranged in parallel; the COF carrier tape, the left and right sides of the COF carrier tape are respectively provided with a plurality of first through holes and a plurality of second through holes, and a plurality of first through holes and a plurality of first through holes. The two through holes are arranged in parallel; when the COF carrier tape is installed on the ratchet body, the first positioning teeth can pass through the first through holes, the second positioning teeth can pass through the second through holes, and the first positioning teeth and the second positioning teeth can pass through the second through holes. The outer peripheral surfaces of the teeth are all smooth surfaces, which can prevent the COF carrier tape from being scratched. By designing the outer peripheral surfaces of the first positioning teeth and the second positioning teeth as smooth surfaces without sharp right angles and edges, the new model can prevent the edges of the first through holes and the second through holes from being scratched during transportation, and reduce COF. The tear rate and defect rate of the carrier tape when it is used later.

Description

Ratchet for COF carrier tape conveying

The new model relates to the technical field of ratchets, in particular to a ratchet for conveying COF carrier tapes.

Carrier Tape refers to a tape-like product used in the field of electronic packaging. It has a specific thickness and is equidistantly distributed along its length with holes for holding electronic components and for indexing positioning. positioning hole.

The full name of COF (chip on film) is chip on film. The display driver chip is directly mounted on the flexible circuit board without any packaging to achieve the purpose of reducing the volume and being able to bend freely. COF flexible packaging carrier tape is a flexible circuit board connecting semiconductor display chips and terminal products, and is a key material in the COF packaging process; COF packaging display driver chips are currently mainly used in the display screens of TVs, computers and mobile phones. One of the key core chips of OLED displays.

Ratchet is often used to transport COF carrier tape. The needle teeth on the ratchet wheel can pass through the square hole on the COF carrier tape. When the ratchet wheel rotates, the tooth needle can drive the COF carrier tape to move.

For example, the Chinese Patent Publication No. CN107504155A discloses a COF carrier tape ratchet, and the needle teeth on the ratchet wheel have a quadrangular pyramid structure (as shown in Figure 1), that is to say, the bottom surface of the needle teeth in the prior art is a quadrilateral, It has four right angles and four edges; the COF carrier tape is film-like and very thin. When the ratchet rotates, the bottom edge and edge of the needle teeth are equivalent to "sharp knives", which can easily cut the COF carrier tape. The square hole of the tape leads to an increase in the tear rate and defective rate of the COF carrier tape in the later use. In addition, the needle teeth in the prior art are usually integrally formed on the surface of the ratchet by turning and milling. This processing method not only fails to improve the sharpness of the four corners of the needle teeth and the existence of burrs, but also has low processing accuracy.

The technical problem to be solved by this new model is: in order to solve the technical problem that the COF carrier tape ratchet in the prior art leads to the increase of the tear rate and the defective rate of the COF carrier tape during use, the present model provides a ratchet for COF carrier tape conveying and its use. The method can prevent the COF carrier tape from being scratched during transmission, thereby reducing the tear rate and defect rate.

The technical solution adopted by this new model to solve the technical problem is: a ratchet for COF carrier tape conveying, comprising: a ratchet body, the ratchet body is cylindrical, and the left and right sides of the ratchet body surface are respectively provided with a plurality of first positioning teeth and The plurality of second positioning teeth, the plurality of first positioning teeth and the plurality of second positioning teeth are arranged in parallel; the COF carrier tape, the left and right sides of the COF carrier tape are respectively provided with a plurality of first through holes and a plurality of second through holes, and the plurality of first through holes are provided. The holes and the plurality of second through holes are arranged in parallel; when the COF carrier tape is installed on the ratchet body, the first positioning teeth can pass through the first through holes, and the second positioning teeth can pass through the second through holes, Moreover, the outer peripheral surfaces of the first positioning teeth and the second positioning teeth are both smooth surfaces, which can prevent the COF carrier tape from being scratched.

By designing the outer peripheral surfaces of the first positioning teeth and the second positioning teeth as smooth surfaces without sharp right angles and edges, the new model can prevent the edges of the first through holes and the second through holes from being scratched during transportation and reduce defects. Rate.

Further, the first positioning tooth includes a first cylindrical portion and a first hemispherical portion, the first hemispherical portion is fixed on the top end of the first cylindrical portion; the second positioning tooth includes a second cylindrical portion and The second hemispherical body part is fixed on the top end of the second cylindrical body part. In this way, the outer peripheral surfaces of the first positioning teeth and the second positioning teeth are both smooth surfaces.

Further, the left side of the ratchet main body is provided with a plurality of first installation holes, the right side of the ratchet main body is provided with a plurality of second installation holes, the first positioning teeth are installed in the first installation holes, and the second positioning teeth are installed in the in the second mounting hole. In this way, the first positioning teeth and the second positioning teeth can be processed separately, which reduces the processing difficulty and improves the processing accuracy.

Further, in order to position the COF carrier tape, the bottom of the first cylindrical portion is located in the first mounting hole, and the top of the first cylindrical portion and the first hemispherical portion are located outside the first mounting hole; The bottom of the second cylindrical portion is located in the second mounting hole, and the top of the second cylindrical portion and the second hemispherical portion are located outside the second mounting hole.

Further, the ratchet body is provided with an annular groove, and the annular groove is located between the first positioning tooth and the second positioning tooth, and a rubber ring is embedded in the annular groove, and the outer surface of the rubber ring is connected to the ratchet body. The outer surface is flush. The rubber ring can increase the friction force and prevent the COF carrier tape from sliding.

Further, the Shore hardness of the rubber ring is 65-95. The harder rubber ring can ensure the flatness of the COF carrier tape.

Further, the first through hole and the second through hole are both 1.42mm*1.42mm square holes, the diameters of the first cylinder part and the first hemispherical part are both 1mm, and the second cylinder part and the first Both hemispheres have a diameter of 1 mm.

Further, the material of the ratchet body is metal or plastic.

The beneficial effect of the present new model is that the ratchet wheel for COF carrier tape conveying and its using method of the present new model, by designing the outer peripheral surfaces of the first positioning teeth and the second positioning teeth as smooth surfaces without sharp right angles and edges, can Prevent the edges of the first through hole and the second through hole from being scratched during transportation; increase the frictional force through the rubber ring, which can prevent the slippage of the COF carrier tape from dislocation, thereby reducing the tear rate and defective rate of the COF carrier tape when it is used later. Also save costs.

The present invention will now be described in further detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or element. It must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, features delimited with "first", "second" may expressly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection. Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in Figures 2 to 10, a ratchet wheel for COF carrier tape conveying includes: a ratchet wheel body 1 and a COF carrier tape 4, the ratchet wheel body 1 is cylindrical, and the left and right sides of the ratchet body 1 surface are respectively provided with a plurality of first positioning Teeth 2 and a plurality of second positioning teeth 3, a plurality of first positioning teeth 2 and a plurality of second positioning teeth 3 are arranged in parallel; the left and right sides of the COF carrier tape 4 are respectively provided with a plurality of first through holes 41 and a plurality of second through holes 42, The plurality of first through holes 41 and the plurality of second through holes 42 are arranged in parallel; when the COF carrier tape 4 is installed on the ratchet body 1, the first positioning teeth 2 can pass through the first through holes 41, and the second positioning teeth 3 can pass through. Passing through the second through hole 42, and the outer peripheral surfaces of the first positioning tooth 2 and the second positioning tooth 3 are both smooth surfaces, which can prevent the COF carrier tape 4 from being scratched. By designing the outer peripheral surfaces of the first positioning teeth 2 and the second positioning teeth 3 to be smooth surfaces without sharp right angles and edges, the present invention can prevent the first through holes 41 and the second through holes 42 from being scratched during transportation. edge, thereby reducing the tear rate and defective rate of the COF carrier tape 4 in later use, and also saving costs.

In one embodiment, the first positioning tooth 2 includes a first cylindrical portion 21 and a first hemispherical portion 22, the first hemispherical portion 22 is fixed on the top of the first cylindrical portion 21; the second positioning tooth 3 includes a first hemispherical portion 22. There are two cylindrical body parts 31 and a second hemispherical body part 32 , and the second hemispherical body part 32 is fixed on the top of the second cylindrical body part 31 . For example, the first through holes 41 and the second through holes 42 are both square holes of 1.42mm*1.42mm, the diameters of the first cylindrical part 21 and the first hemispherical part 22 are both 1 mm, and the second cylindrical part 31 and The diameter of the second hemispherical body portion 32 is both 1 mm. In other words, the outer peripheral surfaces of the first cylindrical portion 21 , the first hemispherical portion 22 , the second cylindrical portion 31 and the second hemispherical portion 32 are all smooth surfaces, and the first cylindrical portion 21 and the second cylindrical portion 31 The outer peripheral surfaces of the first hemispherical body part 22 and the second hemispherical body part 32 are spherical surfaces, and the diameters of the first cylindrical body part 21 and the first hemispherical body part 22 are equal, and they are also smooth. In the transition, the diameters of the second cylindrical part 31 and the second hemispherical part 32 are equal, and the transition between them is also smooth. That is to say, all surfaces of the first positioning tooth 2 and the second positioning tooth 3 of the present invention are smooth surfaces, without sharp right angles or sharp edges. During the conveying process, the first positioning teeth 2 will not If the edge of the first through hole 41 is scratched, the second positioning teeth 3 will not scratch the edge of the second through hole 42 . In other words, the structure of the pin teeth in the prior art is in point contact with the edge of the square hole of the COF carrier tape, and the force point is relatively concentrated, and the edge of the square hole is easily scratched. In this new model, the first positioning tooth 2 and the second positioning teeth 3 are both smooth surfaces, which are in surface contact when contacting with the edge of the through hole, and the stress points are relatively scattered, which reduces the risk of the edge of the through hole being scratched.

In one embodiment, the left side of the ratchet body 1 is provided with a plurality of first mounting holes 11, the right side of the ratchet body 1 is provided with a plurality of second mounting holes 12, the first positioning teeth 2 are mounted in the first mounting holes 11, the second The positioning teeth 3 are installed in the second installation holes 12 . In other words, the first positioning teeth 2 and the second positioning teeth 3 are not integrally formed with the ratchet body 1, but are independent pieces, and the first positioning teeth 2 and the second positioning teeth 3 are formed separately. After the first positioning teeth 2 and the second positioning teeth 3 are formed, they are respectively installed into the first installation holes 11 and the second installation holes 12 one by one. The size of the first mounting hole 11 matches the diameter of the first positioning tooth 2 , and the size of the second mounting hole 12 matches the diameter of the second positioning tooth 3 . Specifically, the bottom of the first cylinder part 21 is located in the first installation hole 11 , the top of the first cylinder part 21 and the first hemispherical part 22 are located outside the first installation hole 11 ; the bottom of the second cylinder part 31 Located inside the second installation hole 12 , the top of the second cylindrical portion 31 and the second hemispherical portion 32 are located outside the second installation hole 12 . In other words, the first hemispherical body part 22 and the second hemispherical body part 32 are located outside the first mounting hole 11 and the second mounting hole 12 respectively, and play a positioning role for the COF carrier tape 4 . Most of the first cylinder part 21 is located in the first installation hole 11, and a small part of the first cylinder part 21 is located outside the first installation hole 11, which can strengthen the positioning effect and prevent the COF carrier tape 4 from directly passing from the first hemisphere. part 22 to disengage. Most of the second cylindrical portion 31 is located in the second mounting hole 12, and a small portion of the second cylindrical portion 31 is located outside the second mounting hole 12, which can strengthen the positioning effect and prevent the COF carrier tape 4 from directly passing from the second hemisphere. part 32 to disengage. For example, let the length of the first cylinder part 21 and the second cylinder part 31 be L, the length inside the mounting hole is L1, and the length outside the mounting hole is L2, L1+L2=L, L1: L2=18 : 1. In other words, most of the first cylinder part 21 and the second cylinder part 31 are located in the installation holes, which can improve the assembly stability of the first positioning tooth 2 and the second positioning tooth 3, and prevent the ratchet wheel from rotating during the rotation process. drop in.

In one embodiment, the ratchet body 1 is provided with an annular groove 13, the annular groove 13 is located between the first positioning tooth 2 and the second positioning tooth 3, and a rubber ring 14 is embedded in the annular groove 13. The rubber ring 14 The outer surface is flush with the outer surface of the ratchet body 1 . Specifically, the width of the rubber ring 14 matches the width of the annular groove 13 , and the thickness of the rubber ring 14 matches the thickness of the annular groove 13 . When the COF carrier tape 4 is installed on the ratchet body 1, the overall width W1 of the COF carrier tape 4 is greater than the distance W2 between the first positioning tooth 2 and the second positioning tooth 3, that is, W1 is greater than W2, therefore, the COF carrier tape 4 The middle part is located on the rubber ring 14, and the two sides of the COF carrier tape 4 are located on the ratchet body 1. Therefore, the outer surface of the rubber ring 14 needs to be kept flush with the outer surface of the ratchet body 1, so that the film surface of the COF carrier tape 4 remains In the same plane to prevent damage to the COF carrier tape 4. For example, the Shore hardness of the rubber ring 14 is 65-95. The higher the Shore hardness is, the harder the rubber ring 14 is, and the surface of the rubber ring 14 is rough. The ratchet body 1 is made of metal or plastic, and the surface of the metal or plastic is generally a smooth surface. The rubber ring 14 provided in the middle part of the ratchet body 1 can increase the frictional force on the COF carrier tape 4 and prevent the COF carrier tape 4 from being conveyed during the conveying process. Damage caused by sliding. As mentioned above, the first through holes 41 and the second through holes 42 are both square holes of 1.42mm*1.42mm, and the diameters of the first cylinder part 21 and the second cylinder part 31 are both 1mm, that is to say, the cylinder There is a gap of 0.42mm between the body and the through hole. If the COF carrier tape 4 is directly placed on the surface of the ratchet body 1, the frictional force is too small. During the transmission process, the through hole will slide forward, causing the edge of the through hole to be damaged. If the external force is pulled, the frictional force is increased by the rubber ring 14, which can prevent the COF carrier tape 4 from sliding and dislocating, so as to ensure that the through hole does not come into contact with the cylinder portion. The rubber ring 14 is made of a hard material, which can prevent the rubber ring 14 from being deformed and ensure the smoothness of the COF carrier tape 4 . In other words, through the first positioning tooth 2, the second positioning tooth 3 and the rubber ring 14, the COF carrier tape 4 can be further prevented from being scratched during the conveying process, the damage of the COF carrier tape 4 can be reduced, and the tearing rate of the COF carrier tape 4 can be reduced. And defect rate, improve production efficiency and economic benefits.

As shown in FIG. 11 , a method of using a ratchet for COF carrier tape conveyance adopts the above-mentioned ratchet for COF carrier tape conveyance. The method of using the ratchet for COF carrier tape conveying includes the following steps: S1. Process and shape the first positioning tooth 2 and the second positioning tooth 3, and the outer peripheral surfaces of the first positioning tooth 2 and the second positioning tooth 3 are both smooth surfaces. S2. Install the plurality of first positioning teeth 2 and the plurality of second positioning teeth 3 into the ratchet body 1 . S3. Install the COF carrier tape 4 on the ratchet body 1, the first positioning teeth 2 pass through the first through holes 41, and the second positioning teeth 3 pass through the second through holes 42; when the ratchet body 1 rotates, the COF carrier tape 4 can be transported forward (ie X direction). The ratchet body 1 can be driven by a motor, for example.

In other words, the first locating teeth 2 and the second locating teeth 3 are not machined from the ratchet body 1 by turning and milling, but are machined separately, which can simplify the machining process and improve the machining accuracy. By designing the outer peripheral surfaces of the first positioning teeth 2 and the second positioning teeth 3 as smooth surfaces, they are in surface contact with the edge of the through hole, and the stress points are relatively scattered, reducing the risk of the edge of the through hole being scratched.

To sum up, by designing the outer peripheral surfaces of the first positioning teeth 2 and the second positioning teeth 3 as smooth surfaces without sharp right angles and edges, the first through holes 41 and the second through holes 41 and the second through holes can be prevented from being scratched during transportation. The edge of the hole 42; the friction force is increased by the rubber ring 14, which can prevent the COF carrier tape 4 from sliding and dislocated, thereby reducing the tear rate and defect rate of the COF carrier tape 4 during later use, and also saving costs.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above descriptions, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the new invention is not limited to the content in the description, and its technical scope must be determined according to the scope of the claims.

1: Ratchet body 2: The first positioning tooth 3: The second positioning tooth 4: COF carrier tape 11: The first mounting hole 12: Second mounting hole 13: Annular groove 14: apron 21: The first cylinder part 22: First hemisphere body 31: Second cylinder part 32: Second hemisphere body 41: first through hole 42: Second through hole

FIG. 1 is a schematic structural diagram of a ratchet wheel in the prior art. FIG. 2 is a schematic view of the structure of the ratchet wheel for COF carrier tape conveying of the present invention. FIG. 3 is a schematic view of the structure of the ratchet main body of the present invention. 4 is a cross-sectional view of the ratchet main body of the present invention. Fig. 5 is a partial schematic view of a cross-sectional view of the ratchet wheel for COF carrier tape conveying of the present invention. 6 is a cross-sectional view of the COF carrier tape of the present invention. FIG. 7 is a schematic diagram of a plurality of first positioning teeth and a plurality of second positioning teeth of the present invention. FIG. 8 is a schematic structural diagram of the first positioning tooth of the present invention. FIG. 9 is a schematic structural diagram of the second positioning tooth of the present invention. FIG. 10 is a schematic view of the first positioning teeth of the present invention passing through the first through holes. 11 is a flowchart of a method of using the ratchet for COF carrier tape conveyance of the present invention.

1: Ratchet body

2: The first positioning tooth

3: The second positioning tooth

4: COF carrier tape

41: first through hole

42: Second through hole

Claims (8)

A ratchet for COF carrier tape conveying, comprising: A ratchet body (1), the ratchet body (1) is cylindrical, and the left and right sides of the ratchet body (1) are respectively provided with a plurality of first positioning teeth (2) and a plurality of second positioning teeth (3). A positioning tooth (2) and a plurality of second positioning teeth (3) are arranged in parallel; A COF carrier tape (4), the left and right sides of the COF carrier tape (4) are respectively provided with a plurality of first through holes (41) and a plurality of second through holes (42), a plurality of first through holes (41) and a plurality of first through holes (41) and a plurality of second through holes (42). Two through holes (42) are arranged in parallel; When the COF carrier tape (4) is installed on the ratchet body (1), the first positioning tooth (2) can pass through the first through hole (41), and the second positioning tooth (3) can pass through The second through hole (42), and the outer peripheral surfaces of the first positioning tooth (2) and the second positioning tooth (3) are both smooth surfaces, which can prevent the COF carrier tape (4) from being scratched. The ratchet for COF carrier tape conveying according to claim 1, wherein the first positioning tooth (2) comprises a first cylindrical part (21) and a first hemispherical part (22), the first half The spherical body part (22) is fixed on the top end of the first cylindrical body part (21); the second positioning tooth (3) comprises a second cylindrical body part (31) and a second hemispherical body part (32). The two hemispherical body parts (32) are fixed on the top end of the second cylindrical body part (31). The ratchet for COF carrier tape conveying according to claim 2, wherein the left side of the ratchet body (1) is provided with a plurality of first mounting holes (11), and the right side of the ratchet body (1) is provided with a plurality of second mounting holes A hole (12), the first positioning tooth (2) is installed in the first installation hole (11), and the second positioning tooth (3) is installed in the second installation hole (12). The ratchet for COF carrier tape conveying according to claim 3, wherein the bottom of the first cylindrical portion (21) is located in the first mounting hole (11), and the top of the first cylindrical portion (21) is located in the first mounting hole (11). and the first hemispherical body portion (22) is located outside the first mounting hole (11); the bottom of the second cylindrical body portion (31) is located in the second mounting hole (12), and the second cylindrical body portion ( The top of 31) and the second hemispherical body portion (32) are located outside the second mounting hole (12). The ratchet for COF carrier tape conveying according to claim 1, wherein the ratchet body (1) is provided with an annular groove (13), and the annular groove (13) is located between the first positioning tooth (2) and the Between the second positioning teeth (3), a rubber ring (14) is embedded in the annular groove (13), and the outer surface of the rubber ring (14) is flush with the outer surface of the ratchet body (1). The ratchet for COF carrier tape conveying according to claim 5, wherein the Shore hardness of the rubber ring (14) is 65-95. The ratchet for COF carrier tape conveying according to claim 2, wherein the first through hole (41) and the second through hole (42) are both 1.42mm*1.42mm square holes, and the first cylinder The diameters of the first hemispherical body part (21) and the first hemispherical body part (22) are both 1 mm, and the diameters of the second cylindrical body part (31) and the second hemispherical body part (32) are both 1 mm. The ratchet for COF carrier tape conveying according to claim 1, wherein the material of the ratchet body (1) is metal or plastic.

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