TWI411365B - Conveyer for flexible printed circuit board - Google Patents

Abstract

The present invention relates to a conveyer for flexible printed circuit board. The conveyer includes an unwinding roller, a rewinding mechanism and a direction mechanism between the unwinding roller and the rewinding mechanism. The unwinding roller is configured for distributing a flexible printed circuit board. The rewinding mechanism is used for rewinding the flexible printed circuit board pass by the direction mechanism. The direction mechanism includes a receiving tank, a direction roller, and a suction structure. The unwinding roller and the direction roller are all above the receiving tank. The receiving tank is adapted for receiving the flexible printed circuit board deposited between the unwinding roller and the direction roller. The direction roller defines a number of through holes. The suction structure connects with the receiving tank and the direction roller and is used for sucking some gas from the receiving tank to the direction roller, then the gas is blown out through the through holes.

Description

Flexible circuit board transmission device

The present invention relates to circuit board technology, and more particularly to a flexible circuit board transmission apparatus that reduces wear on a flexible circuit board.

With the advancement of science and technology, printed circuit boards are widely used in digital fields. For application of the circuit board, please refer to the literature Takahashi, A.Ooki, N.Nagai, A.Akahoshi, H.Mukoh, A.Wajima,M.Res.Lab,High density multilayer printed circuit board for HITAC M-880,IEEE Trans .on Components, Packaging, and Manufacturing Technology, 1992, 15(4): 418-425.

Due to its flexibility, light weight and thin thickness, flexible circuit boards are widely used in digital products that require thin design or movable mechanism design, such as mobile phones, notebook computers, monitors, consumer digital products and touch panels. . The manufacture of flexible circuit boards is usually achieved by a Roll To Roll (RTR) production process. The tape-and-reel production process refers to a process of continuously processing a coil-shaped production and a roll-to-roll delivery of a long-shaped circuit substrate, and can be applied to processes such as etching, electrolysis, electroplating, and screen printing. The production process can greatly improve the automation and productivity of flexible circuit board production, reduce production costs, and improve the qualification rate, quality and reliability of flexible circuit board products. In the current tape and reel manufacturing process, a rotating reel is usually used to provide tension to the flexible circuit board. To change the transmission direction of the flexible circuit board. In the production process of the flexible circuit board, the motor for driving the reel rotation frequently starts and brakes, and the pulling phenomenon of the flexible circuit board is easily generated at the instant of starting, and the overturning phenomenon of the flexible circuit board is easily generated at the moment of braking, frequently pulling The over-rotation causes the tension of the flexible circuit board to change frequently, making the tension difficult to control, and the conductive circuit of the flexible circuit board is damaged by the friction with the reel, thereby affecting the yield of the flexible circuit board.

In view of this, it is necessary to provide a flexible circuit board transmission device that can reduce wear on a flexible circuit board.

A flexible circuit board transmission device includes a delivery wheel, a retracting mechanism, and a reversing mechanism between the delivery wheel and the retracting mechanism. The delivery wheel is used to deliver a flexible circuit board. The retracting mechanism is configured to reel the flexible circuit board passing through the reversing mechanism. The reversing mechanism includes a receiving groove, a reversing wheel and a pumping structure. The delivery wheel and the reversing wheel are both located above the accommodating groove. The accommodating groove is configured to receive a flexible circuit board that is disposed between the feeding wheel and the reversing wheel. The reversing wheel is provided with a plurality of exhausting through holes, and the pumping structure is connected between the receiving groove and the reversing wheel for extracting gas in the receiving groove and supplying the gas The diverting wheel is configured to eject the gas from the plurality of exhaust through holes.

A flexible circuit board transmission device includes a delivery wheel, a retracting mechanism, and a plurality of reversing mechanisms between the delivery wheel and the retracting mechanism. The delivery wheel is used to deliver a flexible circuit board. The retracting mechanism is configured to reel the flexible circuit board passing through the reversing mechanism. Each of the reversing mechanisms includes a receiving groove, a reversing wheel and a pumping structure. The delivery wheel and the reversing wheel are both located above the accommodating groove. The receiving slot is used for accommodating a flexible circuit board that is disposed between the delivery wheel and the reversing wheel or between the two reversing wheels. The reversing wheel is provided with a plurality of exhausting through holes, and the pumping structure is connected between the receiving groove and the reversing wheel for extracting gas in the receiving groove and supplying the gas The diverting wheel is configured to eject the gas from the plurality of exhaust through holes.

The reversing mechanism of the flexible circuit board transmission device provided by the technical solution comprises a receiving groove, a reversing wheel and a pumping structure, and the pumping structure extracts air from the accommodating groove, thereby providing a pulling force to the flexible circuit board to keep the flexible circuit board flat. The reversing wheel is provided with a through hole, and the air discharged from the pumping structure to the reversing wheel is ejected from the through hole, which can avoid the friction of the flexible circuit board and the reversing wheel and damage, without using compressed air. The flexible circuit board transmission device has a simple structure and a low cost, and can be applied to various processes in a tape and tape production process.

10‧‧‧Flexible circuit board transmission

11‧‧‧Distribution wheel

12‧‧‧Reversing agency

13‧‧‧Receipt agency

120‧‧‧ accommodating slots

1200‧‧‧ side panel

1201‧‧‧floor

1202‧‧‧ accommodating space

1203‧‧‧Exhaust communication hole

121‧‧‧Reversing wheel

1210‧‧‧ top wall

1211‧‧‧ side wall

1212‧‧‧ bottom wall

1213‧‧‧ cavity

1214‧‧‧Exhaust communication hole

1215‧‧‧Exhaust through hole

122‧‧‧Exhaust structure

1220‧‧‧Exhaust pipe

1221‧‧‧Air pump

1222‧‧‧Exhaust pipe

1223‧‧‧Exhaust port

1224‧‧‧Exhaust port

130‧‧‧Receipt drive

131‧‧‧Reel

132‧‧‧ Output shaft

133‧‧‧With holes

100‧‧‧ Tape and Reel Flexible Circuit Board

101‧‧‧ rolls

102‧‧‧Flexible circuit board

103‧‧‧Free end

200‧‧‧Cutting tools

FIG. 1 is a schematic structural diagram of a flexible circuit board transmission device provided by the technical solution.

Figure 2 is a schematic cross-sectional view taken along line II-II of Figure 1.

FIG. 3 is a schematic diagram of a flexible circuit board transmission apparatus provided by the present technical solution.

The flexible circuit board transmission device provided by the technical solution will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 and FIG. 2 together, the technical solution provides a flexible circuit board transmission device 10 including a delivery wheel 11, at least one reversing mechanism 12, and a retracting mechanism 13.

The delivery wheel 11 is used to deliver a flexible circuit board. The delivery wheel 11 can be cylindrical. The delivery wheel 11 can be disposed at a certain height by a support frame (not shown), and It can rotate around its own central axis.

The at least one reversing mechanism 12 is located between the delivery wheel 11 and the retracting mechanism 13 and is configured to convert a transmission direction of a flexible circuit board that is disposed between the delivery wheel 11 and the retracting mechanism 13. In this embodiment, there is only one reversing mechanism 12. The reversing mechanism 12 includes a receiving groove 120, a reversing wheel 121 and a pumping structure 122.

The accommodating groove 120 is disposed below the side of the delivery wheel 11 for accommodating a flexible circuit board that is disposed between the delivery wheel 11 and the reversing wheel 121. The accommodating groove 120 includes a side plate 1200 and a bottom plate 1201 connected thereto. The side plate 1200 and the bottom plate 1201 are enclosed together to form an accommodating space 1202. The accommodating groove 120 is provided with an air suction communication hole 1203. The air suction communication hole 1203 is opened at the side plate 1200 near the bottom plate 1201.

The reversing wheel 121 is fixed above the accommodating groove 120 for converting the transmission direction of the flexible circuit board from the accommodating groove 120. The reversing wheel 121 may be a hollow cylindrical shape including a top wall 1210, a side wall 1211 and a bottom wall 1212 which are sequentially connected. The top wall 1210, the side wall 1211 and the bottom wall 1212 are enclosed together to form a cavity 1213. The reversing wheel 121 has an exhaust communication hole 1214. The exhaust communication hole 1214 is defined in the top wall 1210 or the bottom wall 1212. In this embodiment, the exhaust gas communication hole 1214 is opened in the top wall 1210. The reversing wheel 121 also has a plurality of exhaust through holes 1215. The plurality of exhaust through holes 1215 are respectively defined in the sidewall 1211 and adjacent to the receiving groove 120. In this embodiment, the reversing wheel 121 is configured to change the transmission direction of the flexible circuit board from the accommodating groove 120 by 90 degrees, and the plurality of exhaust gases are viewed from a cross section parallel to the top wall 1210 or the bottom wall 1212. The through holes 1215 are mainly distributed on the side wall 1211 to form a quarter circumference, that is, the distribution range of the plurality of exhaust through holes 1215. It occupies one quarter of the surface of the side wall 1211, so that the gas discharged from the reversing wheel 121 can be relatively concentrated. Of course, the plurality of exhaust through holes 1215 may be mainly distributed on the side wall 1211 to form a half circumference, that is, the distribution of the plurality of exhaust through holes 1215 may occupy the surface of the side wall 1211. One-half, as such, the diverting wheel 121 can be used to shift the transmission direction of the flexible circuit board from the accommodating slot 120 by 0 to 180 degrees.

The air extraction structure 122 is connected between the accommodating groove 120 and the reversing wheel 121 for extracting the gas in the accommodating groove 120, and supplies the gas to the reversing wheel 121. The gas is ejected from the plurality of exhaust through holes 1215. The pumping structure 122 includes an exhaust pipe 1220, an air pump 1221, and an exhaust pipe 1222. The air pump 1221 has an air outlet 1223 and an air outlet (not shown), and the air exhaust pipe 1220 is connected between the air inlet 1223 and the air communication hole 1203 of the receiving slot 120. The air pipe 1222 is connected between the exhaust port and the exhaust communication hole 1214 of the accommodating groove 120. The air pump 1221 can be a vacuum pump. During operation, the motor of the vacuum pump performs a circular motion to reciprocate the diaphragm inside the pump, thereby compressing and stretching the air in the pump chamber to form a negative pressure at the air suction port. At 1223, a pressure difference is generated from the outside atmospheric pressure. Under the action of the pressure difference, the gas in the accommodating groove 120 is sucked into the pump chamber, and then discharged from the exhaust port into the reversing wheel 121.

The retracting mechanism 13 is configured to reel the flexible circuit board passing through the at least one reversing mechanism 12. The take-up mechanism 13 includes a take-up drive 130 and at least one take-up reel 131 mechanically coupled to the take-up drive 130. The take-up drive 130 can be a motor having an output shaft 132. The take-up reel 131 may be in the shape of a cylinder, and a protrusion for positioning the flexible circuit board may be formed on the surface thereof as needed. In this embodiment, the The number of the retracting wheels 131 is two, and each of the retracting wheels 131 has a fitting hole 133 which is opened along the central axial direction thereof. The output shaft 132 is embedded in the matching hole 133 and is interference-fitted with the matching hole 133, so that the winding wheel 131 can be synchronously rotated when the output shaft 132 rotates. Of course, the at least one reeling wheel 131 can also be mechanically connected to the retracting drive 130 by a belt, a gear or other linkage device, and only needs to be driven by the retracting drive 130 to receive the material.

Of course, two, three or more commutating mechanisms 12 may be disposed between the delivery wheel 11 and the retracting mechanism 13 according to actual production needs, so as to convert the transmission direction when the flexible circuit board that needs to be protected is transported on the surface. The role. Further, the number of the winding reels 131 of the retracting mechanism 13 may be one, or three or more.

Referring to FIG. 1 and FIG. 3 together, the following is a process of cutting a flexible circuit board as an example to illustrate a method for using the flexible circuit board transmission device 10 provided by the technical solution, which may include the following steps: First, providing a volume The tape type flexible circuit board 100 and the cutting tool 200. The tape-and-reel flexible circuit board 100 includes a cylindrical roll 101 in the middle and a flexible circuit board 102 wound around the roll 101. The flexible circuit board 102 has a free end 103 remote from the roll 101. Of course, the two sides of the tape-type flexible circuit board 100 may also be provided with chain holes for positioning.

Then, the tape-type flexible circuit board 100 is stretched between the delivery wheel 11 and the retracting mechanism 13, and the cutting tool 200 is placed between the delivery wheel 11 and the retracting mechanism 13. The cutting tool 200 is opposed to the take-up type flexible circuit board 100. Specifically, the roll 101 is sleeved on the delivery wheel 11 to make a partial flexible circuit board The material 102 is received in the accommodating groove 120, and the free end portion 103 of the flexible circuit board 102 is finally disposed around the reversing wheel 121 and finally disposed on the retracting mechanism 13. In the present embodiment, the retracting wheel 131 is two, and the free end portion 103 can be cut into two parts from the middle, one part is disposed on one reeling wheel 131, and the other part is disposed on the other reeling wheel 131. The cutting tool 200 is located between the reversing mechanism 12 and the retracting mechanism 13 near the retracting mechanism 13 and opposite to the flexible circuit board 102.

Finally, the pumping structure 122 of the reversing mechanism 12 is opened, and the take-up type flexible circuit board 100 is wound up by the retracting mechanism 13. After the air pump 1221 is turned on, the air in the accommodating tank 120 enters the cavity 1213 of the reversing wheel 121 through the air suction communication hole 1203, the air exhaust pipe 1220, the air pump 1221 and the exhaust pipe 1222. Therefore, a negative pressure is formed in the accommodating space 1202, and a part of the flexible circuit board 102 in the accommodating groove 120 is caused to have a certain adsorption force, so that a part of the flexible circuit board 102 in the accommodating groove 120 is further accommodated in the accommodating groove 120. At the same time, the retracting mechanism 13 provides an upward pulling force to the take-up type flexible circuit board 100 to reel the reel type flexible circuit board 100, so that the accommodating groove 120 and the retracting mechanism 13 can be maintained. The flexible circuit board 102 is flat. By adjusting the air pump 1221 and the retracting drive 130, the upward pulling force generated by the retracting mechanism 13 on the take-up type flexible circuit board 100 is greater than the absorbing force generated by the receiving groove 120 on the tape reel flexible circuit board 100. The size of the flexible circuit board 102 can drive the discharge wheel 11 to rotate for continuous discharge. The flexible circuit board 102 in the accommodating groove 120 moves toward the retracting mechanism 13. When moving to the reversing wheel 121 and facing the side wall 1211, the gas ejected from the plurality of exhaust through holes 1215 makes the flexible The circuit board 102 is spaced apart from the side wall 1211 of the reversing wheel 121 without direct contact. Thus, the flexible circuit board 102 and the reversing wheel 121 can be avoided. There is friction between them and damage occurs. When the flexible circuit board 102 passes through the cutting tool 200, the cutting tool 200 is cut into two parts. After cutting, a part reaches a winding wheel 131 and the other part reaches another winding wheel 131.

The reversing mechanism of the flexible circuit board transmission device provided by the technical solution comprises a receiving groove, a reversing wheel and a pumping structure, and the pumping structure extracts air from the accommodating groove, thereby providing a pulling force to the flexible circuit board to keep the flexible circuit board flat. The reversing wheel is provided with a through hole, and the air discharged from the pumping structure to the reversing wheel is ejected from the through hole, which can avoid the friction of the flexible circuit board and the reversing wheel and damage, without using compressed air. The flexible circuit board transmission device has a simple structure and low cost, and can be applied to various manufacturing processes in the tape and tape production process.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Flexible circuit board transmission

11‧‧‧Distribution wheel

12‧‧‧Reversing agency

13‧‧‧Receipt agency

120‧‧‧ accommodating slots

1200‧‧‧ side panel

1201‧‧‧floor

1202‧‧‧ accommodating space

1203‧‧‧Exhaust communication hole

121‧‧‧Reversing wheel

1210‧‧‧ top wall

1211‧‧‧ side wall

1212‧‧‧ bottom wall

1214‧‧‧Exhaust communication hole

1215‧‧‧Exhaust through hole

122‧‧‧Exhaust structure

1220‧‧‧Exhaust pipe

1221‧‧‧Air pump

1222‧‧‧Exhaust pipe

1223‧‧‧Exhaust port

130‧‧‧Receipt drive

131‧‧‧Reel

132‧‧‧ Output shaft

133‧‧‧With holes

Claims (9)

A flexible circuit board transmission device includes a delivery wheel, a retracting mechanism, and a reversing mechanism between the delivery wheel and the retracting mechanism, the delivery wheel is for delivering a flexible circuit board, and the retracting mechanism is used for a roll Receiving the flexible circuit board of the reversing mechanism, the reversing mechanism includes a receiving groove, a reversing wheel and a pumping structure, wherein the transmitting wheel and the reversing wheel are located above the receiving groove The accommodating groove is configured to receive a flexible circuit board that is disposed between the transmitting wheel and the reversing wheel, the reversing wheel has a side wall opposite to the flexible circuit board, and the side wall is adjacent to the space One of the slots is provided with a plurality of exhaust through holes, and the pumping structure is connected between the receiving slots and the reversing wheels for extracting the gas in the receiving slots and supplying the gas The diverting wheel is configured to eject the gas from the plurality of exhaust through holes. The flexible circuit board transmission device of claim 1, wherein the plurality of exhaust through holes are distributed in a range of one-half of the surface of the side wall. The flexible circuit board transmission device of claim 1, wherein the reversing wheel further has a bottom wall connected to the side wall, and the bottom wall is provided with a row communicating with the air suction structure. Gas communication hole. The flexible circuit board transmission device of claim 3, wherein the air suction structure comprises an air suction pump and an air exhaust pipe and an exhaust pipe connected to the air pump, and the receiving groove is provided with air pumping. a communication hole through which the exhaust pipe communicates with the accommodating groove, and the exhaust pipe communicates with the reversing wheel through the exhaust communication hole. The flexible circuit board transmission device of claim 4, wherein The accommodating groove has a side plate and a bottom plate connected to each other, and the bottom plate is away from the feeding wheel, and the air venting opening is opened in the side plate and close to the bottom plate. The flexible circuit board transmission device of claim 1, wherein the retracting mechanism comprises a retracting drive and at least one reel that is mechanically coupled to the retracting drive. The flexible circuit board transmission device of claim 6, wherein the retracting drive has an output shaft, the retracting wheel has a fitting hole opened along a central axis thereof, and the output shaft is inserted into the The matching hole cooperates with the matching hole to drive the winding wheel to rotate synchronously when the output shaft rotates. A flexible circuit board transmission device includes a delivery wheel, a retracting mechanism, and a plurality of reversing mechanisms between the delivery wheel and the retracting mechanism, the delivery wheel is for delivering a flexible circuit board, and the retracting mechanism is used for Retracting the flexible circuit board of the reversing mechanism, each of the reversing mechanisms includes a receiving groove, a reversing wheel and a pumping structure, wherein the feeding wheel and the reversing wheel are located in the receiving groove The accommodating groove is configured to receive a flexible circuit board that is disposed between the transmitting wheel and the reversing wheel or between the two reversing wheels, and the reversing wheel is provided with a plurality of exhausting through holes. The pumping structure is connected between the accommodating groove and the reversing wheel for extracting the gas in the accommodating groove, and supplying the gas to the reversing wheel to make the gas The plurality of exhaust through holes are ejected. The flexible circuit board transmission device of claim 8, wherein the reversing wheel has a side wall opposite to the flexible circuit board, and the plurality of through holes are respectively opened on the side wall to be adjacent to the receiving One side of the slot.