KR19980075202A - Flexural resistance test apparatus of flexible PC for optical pickup - Google Patents

Abstract

The present invention relates to an apparatus for testing the flex resistance of a flexible PC for an optical pickup, and the flex resistance of the flexible PC having a complex bending portion having irregular bending characteristics defined by a plurality of bending radii and having different fixed positions at both ends thereof can be tested. Rectangle base frame (1) made of metal having protrusions (5) formed on one side, support rod (20) standing upright on all sides of base frame (1), rail (25) installed on support rod (20), and rail A plate spring 16 is installed on the bottom surface of the sliding plate 30 to which one end of the flexible PCB 70 and 70 'is fixed and connected to one side of the sliding plate 30. 1) the constant speed holding unit 60, the rack gear 35 formed laterally from the upper surface of the sliding plate 30, and the pinion gear 45 meshed with the rack gear 35 are provided on the outer circumferential surface thereof. Drive the rotating plate 40 and the rotating plate 40 processed in one piece, the bay The transfer plate 10 having a motor 50 installed on the frame 1 and a magnet attached to the upper surface of the base frame 1, the height of which is variable, and the other end of the flexible PC 70 and 70 ′ fixed to the upper surface. It is a test device consisting of a flexible PC, and it is possible to conduct a flexural experiment and evaluation without being limited by the bending characteristics of the flexible PC, so that the design of the flexible PC is not limited and various players can be designed, so that a player having excellent dynamic characteristics and durability can be manufactured. It can be effective.

Description

Flexural resistance test apparatus of flexible PC for optical pickup

The present invention relates to a bending resistance test apparatus of the flexible PC for optical pickup, and in particular, since the position and height of the transfer plate to which one end of the flexible PC is fixed are freely adjusted, the curvature is constant, and the curvature is defined as a plurality of longitudinal directions. This invention relates to a flex resistance test apparatus for an optical pick-up flexible PC which can be flexibly tested for flexible PC ratios that are bent or have different end positions, so that the design of the flexible PC ratio is not limited.

Generally, players of optical recording media are devices that play digital audio disks (DADs) or digital video disks (DVDs) for music reproduction using laser light. An optical pickup device is provided below the recording medium for recording.

The optical pickup device installs an actuator-mounted plate on the pickup base while vertically injecting the laser light downward of the disc, and moves the pickup base linearly in the radial direction of the disc to track the desired track position on the disc. Laser light reflected on the disk at the position is detected through the optical elements installed in the actuator and the pickup base, and then converted into an electrical signal to reproduce the optical information of the disk. An example of a conventional optical pickup apparatus is shown in FIG. Similarly, the hologram optical element 100 in which the laser light is emitted and the optical information reflected on the disk is received, and the laser light emitted from the hologram optical element 100 are focused on the disk to correct fine differences in the light spots. An actuator 110 for driving the objective lens 115 and a fine drive of the actuator 110 are required. A power supply and signal transmission and a flexible PC (120) for transmitting a signal for controlling the holographic optical device 100, and the holographic optical device 100 and the actuator 110 is installed and connected to the flexible PC (120) When the pickup base 130 is moved in the radial direction of the disc, the length of both ends of the flexible PC 120 is variable, so that signals between the control and reproducing circuit and the optical pickup device built in the player are transmitted. To be delivered.

Then, the flexible PC 120 connecting the optical pickup device and the player's regeneration circuit is laminated with a conductor such as a copper foil on the surface of the resin film, and printed on a circuit using a corrosion resistant paint on the surface of the copper foil. Next, when stored in an acidic solution, the copper sheet except for the circuit portion coated with paint is corroded to form only a circuit board.

The flexible PC 120 manufactured as described above accommodates the movement of the pick-up base 130 because one end thereof is connected to the optical pickup device so that both ends of the flexible PC 120 are variable according to the linear motion of the pick-up base 130. The flexible PCB 120 has a circuit portion formed on the surface of the film in an extremely fine size, and is bent and repeated so that the lengths of both ends of the flexible PCB 120 are variable, so that the peeling limit or the resin film of the copper foil circuit portion on the film may be Since the flex resistance and durability should be more than a certain level, the flexible PC ratio 120 manufactured in the process is randomly extracted and repeatedly bent tens of thousands of times to evaluate the reliability of the flexible PC ratio 120.

As an example of a conventional apparatus for testing the bending resistance of the flexible PC 120 as described above, as shown in Figure 2 (a), the support plate 121, and is installed on the top of the support plate 121, the flexible PC 120 One end of the sliding plate 122 is fixed, the sliding plate 122 guides the rail 125 is installed on the support plate 121, and installed on the lower end of the sliding plate 122 is a flexible PC ( The lifting plate 123 is provided with a fixing portion 126 of the 120, and the motor 129 and the link 128 for reciprocating the sliding plate 122.

In operation of the conventional bending resistance test apparatus, first, both ends of the flexible PC 120 are fixed to the leaf spring between the sliding plate 122 and the elevating plate 123. At this time, both ends of the flexible PC 120 Since the position is located on the same axis, only the height of both ends is set in the free bending state of the flexible PC 120, and the gap between the lifting plate 123 and the sliding plate 122 is adjusted and fixed to this height. When the flexible PC 120 is fixed as described above, an external power is applied to the motor 129, and the motor 129 articulates the link 128. The rotational movement of the motor 129 by this joint movement converts the link 128 into a reciprocating reciprocation movement, and by this link 128, the sliding plate 122 is guided to the rail 125 so that the reciprocating lateral movement from side to side do. When the sliding plate 122 is reciprocated as described above, the flexible PC 120 having one end fixed to the sliding plate 122 is repeatedly refracted, and the sliding plate 122 and the elevating plate 123 are repeatedly refracted. Since the height of the control is applied to the case of the flexible bending ratio (R) of a single flexible PC (120), the experiment is carried out by measuring the resistance of both ends of the flexible PC (120) and whether the peeling of the printed circuit and the flexible PC ratio (120) It is to test the durability and bending resistance of the resin material.

However, in the conventional test apparatus, as shown in FIG. 2 (b), in the case of the flexible PC ratio 120 ′ having the compound bends having different bending radii (R, R ′) and different mutual positions at both ends, The lower part of the sliding plate 122 and the upper part of the elevating plate 123 contact the upper and lower parts of the flexible bend 120 'more than necessary to limit the free bending motion of the flexible PCB 120' and at the same time, the excessive bend curvature. Since it is repeated refraction, it is installed in the player and the bending conditions actually used and the conditions between the test apparatus are different from each other, and the vibration of the link 128 due to the unevenness of the rotation angle acceleration according to the speed of the link 128 and the rotational motion of the motor 129. This occurred, there was a problem that the durability of the test apparatus is required.

The present invention has been made in view of the above problems, the bending radius is defined as a plurality, and the fixed bending portion of the flexible bending having a compound bending portion of the irregular bending characteristics of different fixed position of the both ends, without limiting the repeated bending motion The reciprocating speed of the flexible PC ratio is maintained at the same time as the speed of the actual installation state without changing the acceleration, and the flexural resistance test condition is optimally tested for the installation condition of the player. The purpose of the present invention is to provide a bending resistance test apparatus of a flexible PC for optical pickup, which can improve the reliability of the flexible PC and accurately measure the flex resistance against various complex flexural properties of the flexible PC according to various kinds of products.

The present invention for achieving the above object is a rectangular base frame of a metal material with a projection formed on one side of the upper surface, a support rod standing upright on all sides of the base frame, the rail is installed on the support rod, and is fitted to this rail Sliding plate is installed on the lower surface is fixed to one end of the flexible PC, the fixed plate is connected to one side of the sliding plate, the constant speed holding portion is installed on the base frame, the rack formed in the transverse direction on the upper surface of the sliding plate A gear and a pinion gear meshed with the rack gear are machined on one side of the outer circumferential surface, a motor installed on the base frame by driving the rotor plate, and a height is detached and attached to the upper surface of the base frame, and the height is variable. Flexure resistance of the flexible PC for the optical pickup device, which is composed of a transfer plate on which the other end of the flexible PC is fixed on the upper surface This is achieved by providing a sex tester.

1 is an exploded perspective view of a general optical pickup device,

Figure 2 (a) (b) is a cross-sectional view showing a use state according to one embodiment of the conventional flexible PC resistance test

Figure 3 is an exploded perspective view showing the bending resistance test apparatus of the flexible PC according to the present invention,

Figure 4 (a) (b) is a cross-sectional view showing a use state according to an embodiment of the flexible PC of the flex resistance test apparatus according to the present invention,

<Explanation of symbols for main parts of drawing>

1: base frame 5, 11: protrusion

10: transfer plate 12: fixed plate

14: temporary rod 15: lifting plate

16: leaf spring 20: support rod

25: rail 30: sliding plate

35: rack gear 40: rotating plate

45: pinion 50: motor

55: shaft 60: constant speed holding unit

62 frame 65 cylinder

66: original piston 67: spring

68: pore 69: oil

70, 70 ': Flexible PC

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the present invention has a rectangular base frame 1 of a metal material having protrusions 5 formed on one side thereof, a support bar 20 standing upright on all sides of the base frame 1, and the support bar. Rail 25 is installed in the transverse direction at the upper end of the 20, and the sliding plate 30 is fitted to the rail 25 and a leaf spring (not shown) is installed on the bottom surface is fixed one end of the flexible PC, and A constant speed maintenance unit 60 connected to one side of the sliding plate 30 and installed in the base frame 1, a rack gear 35 formed in a transverse direction on an upper surface of the sliding plate 30, and The pinion tooth 45 meshed with the rack gear 35 is machined on one outer circumferential surface, and the motor 50 is installed on the base frame 1 while driving the rotary plate 40. Attached to the upper surface of the base frame 1 by magnetic force and the height is variable, the other end of the flexible PC on the upper surface It consists of a fixed feed plate 10, which is.

The transfer plate 10 is formed of a magnet, and has a cylindrical fixing cylinder 12 having a protrusion 11 formed on the lower surface thereof, and a temporary rod 14 having a screw thread formed on an outer circumferential surface thereof and fitted into the center of the fixing cylinder 12. And a lifting plate 15 connected to an upper end of the temporary rod 14 to be moved to and from the screw rotation of the temporary rod 14, and a leaf spring 16 provided on an upper surface of the lifting plate 15. Is done.

In addition, the constant speed maintenance unit 60 reciprocates in the frame 62 installed on the base frame 1, the cylinder 65 installed on the frame 62, and the inner circumferential surface of the cylinder 65. The original piston piston 66, the oil hole 68 perforated on the surface of the original piston 66, the oil 69 injected into the cylinder 65 and flowing the oil hole 68, and the cylinder 65 It consists of a shaft 55 passing through the disc piston 66 and connected to one side of the sliding plate 30, and a spring 67 fitted to the shaft 55 at one side of the disc piston 66.

Next will be described the operation of the present invention made as described above.

First, in the case of flexible PCs having a plurality of curvatures, as shown in FIG. 4A, when the flexible PCs 70 used for the experiment are set, the specification of the player to which the flexible PCs 70 are installed is set. For reference, the height of the transfer plate 10 is adjusted by the length of both ends of the flexible PC 70, which is rotated by the fixing cylinder 12 in which the temporary rods 14 are fitted at the lower part of the elevating plate 15. The height between the steel plate 15 and the fixed cylinder 12 is temporarily adjusted, and the fixed cylinder 12 is positioned on the upper surface of the base frame 1, and then between the lifting plate 15 and the sliding plate 30. The height is positioned equal to both ends of the flexible PC 70, that is, the side height.

Then, one end of the flexible plate 70 of the flexible plate 70 in the state that the height of the elevating plate 15 and the sliding plate 30, the upper portion of the transfer plate 10 is adjusted by the gap between both ends of the flexible plate 70 (sliding plate 30) It is fixed to the leaf spring installed on the lower surface of the When one end of the flexible PC 70 is fixed to the lower surface of the sliding plate 30, the transverse position of the other end is not constant, so the horizontal position of the other end is set while the flexible PC 70 is freely curvature. Then, the transfer plate 10 is moved laterally on the base frame 1 to the other end position of the flexible PC 70. When the position of the conveying plate 10 is properly positioned on the upper surface of the base frame 1, the fixing cylinder 12 is formed of a magnet so that the conveying plate 10 can be fixed magnetically at an arbitrary position of the base frame 1. Since the projections 11 formed under the fixing cylinder 12 are rubbed with the projections 5 on the upper surface of the base frame 1, the fixing by the magnetic force is further improved and the slipping of the transfer plate 10 is prevented. When the position of the fixing cylinder 12 is set in this way, the other end of the flexible PC 70 is fixed to the plate spring 16 on the upper surface of the elevating plate 15.

When the flexible PC 70 is fixed to the test apparatus as described above, an external power is applied to the motor 50 installed on the base frame 1, and the motor 50 is built up by the rotation of the motor 50. The rotating plate 40 rotates. When the rotation of the rotating plate 40 starts, the pinion tooth 45 formed on a part of the outer circumferential surface of the rotating plate 40 rotates, and the rack gear 35 of the sliding plate 30 engaged with the pinion tooth 45 is rotated. Moves the sliding plate 30 in the lateral direction. In this way, while the rack gear 35 is engaged with the pinion tooth 45 and rotates, the shaft 55 connected to one side of the sliding plate 30 also moves laterally, and the cylinder 55 is penetrated by the shaft 55. The disc piston 66 in the cross section moves laterally. At this time, the spring 67 arranged on the shaft 55 at one side of the disc piston 66 is compressed by the disc piston 66 and is supported by one surface of the cylinder 65. Then, the oil 69 injected into the cylinder 65 flows into the oil hole 68 of the disc piston 66, and this flow causes the transverse velocity of the shaft 55 to decelerate and at the same time the viscous force of the oil 69. This makes the speed of the disc piston 66 constant. Thus, while the shaft 55 moves at a constant speed, the pinion teeth 45 of the rotating plate 40 are only partially formed on the outer circumferential surface of the rotating plate 40, so the pinions 45 are not formed at the portion where the pinion teeth 45 are not formed. ) And the rack gear 35 is finished. When the rack gear 35 is separated from the pinion tooth 45, the spring 67, which is built up on the shaft 55 in the cylinder 65 and is compressed, is supported by one surface of the cylinder 65, and the shaft 55 is moved. The shaft 55 is elastically restored by pushing the disc piston 66 of the. In this case, the shaft 55 is prevented by the elastic piston 69 and the oil 69 flowing through the hole 68 is sudden elastic restoration is moved at a constant speed and the elastic restoring force of the spring 67 is the shaft 55 Is moved in the transverse direction opposite to the transverse movement. When the rotating plate 40 of the motor 50 makes one rotation, the pinion teeth 45 of the rotating plate 40 are meshed with the rack gears 35 of the sliding plate 30 again, and the rotating plate 40 is rotated. When the rotation of) is repeated, the shaft 55 is repeatedly moved in the lateral direction stably at a constant speed with the same action as above.

Thus, the sliding plate 30 is the shaft 55 is repeatedly slid at a stable constant speed so that the flexible PC ratio 70 is repeatedly refracted. In the meantime, the transfer plate 10 fixes the other end of the flexible PC 70 by the magnetic force of the fixing cylinder 12, and the protrusions 11 and the protrusions 5 on the upper surface of the base frame 1 below the fixing cylinder 12. ) Is rubbed to prevent slippage that may be caused by vibration of the flexible PC 70. Since the number of times of the repeated refraction experiment is repeated tens of thousands of times, for example, 70,000 to 80,000 times within the lifetime of the player, the test apparatus of the present invention also performs the repeated refraction experiments with the aforementioned number of times for the single flexible PC ratio. By measuring the resistance at both ends of the circuit, the degree of peeling or wiring of the circuit board is measured, and the durability and bending resistance of the resin of the flexible PCB are evaluated.

And, if the curvature is defined as a plurality of bends in the longitudinal direction or both ends of the flexible PC ratio is different from each other, as shown in Figure 4b, refer to the specification of the player is installed a flexible PC 70 'used for the experiment It is to adjust the transfer plate 10 by the length of both ends of the flexible PC ratio 70 ', which is the plurality of curvature while rotating the fixed cylinder 12, the lower portion of the transfer plate 10 in the temporary rod 14 As in the case of the flexible PC 70 having a temporary adjustment of the height between the elevating plate 15 and the fixed cylinder 12, the fixed cylinder 12 is located on the upper surface of the base frame (1) The height between the elevating plate 15 and the sliding plate 30 is positioned equal to the gap between both ends of the flexible PCB 70 ', that is, the side height.

Then, one end portion of the flexible PCB 70 'in the state that the height of the elevating plate 15 and the sliding plate 30, which is the upper portion of the transfer plate 10, is adjusted by the both ends of the flexible PC 70'. Fix it to the leaf spring installed on the lower surface of 30). If one end of the flexible PC 70 'is fixed to the lower surface of the sliding plate 30, the transverse position of the other end is not constant, so the flexible PC 70' is freely curvature and the transverse position of the other end The longitudinal position is set, and the conveying plate 10 is moved laterally and longitudinally to the other end position of the flexible PC 70 '. When the position of the conveying plate 10 is properly positioned on the upper surface of the base frame 1, the fixing cylinder 12 is formed of a magnet so that the conveying plate 10 is fixed to the fixed frame 12 at an arbitrary position of the base frame 1. It can be fixed by the magnetic force of. When the position of the fixing cylinder 12 is set in this way, the other end of the flexible PC 70 'is fixed to the plate spring 16 on the upper surface of the elevating plate 15.

When the flexible PC 70 'is fixed to the test apparatus as described above, an external power source is applied to the motor 50, and the motor 50 is driven by the power source, and the flexible PC 70' has a plurality of curvatures. The sliding plate 30 is repeatedly moved in the lateral direction in the same manner as in the case, and the bending resistance of the flexible PCB 70 'which is bent in the longitudinal direction or the opposite ends are different from each other while the curvature is defined as a plurality of repeated movements. It can be.

On the other hand, in order to make the movement distance of the sliding plate 30 equal to the movement distance in the player actually applied, the length of the molded part of the pinion tooth 45 formed on the outer circumferential surface of the rotating plate 40 built in the motor 50. And, it adjusts the molding length of the rack gear 35 of the upper surface of the sliding plate 30 to be engaged with the pinion tooth 45, which is determined by the diameter of the rotating plate 40, it is easy to adjust the respective molding length It can be done.

Thus, in the present invention, the lower fixing cylinder 12 is formed of a magnet transfer plate 10 is fixed to the position of the base frame 1 is adjusted arbitrarily, between the transfer plate 10 and the sliding plate 30 When a plurality of curvatures are defined in the longitudinal direction and the flexible PCs 70 and 70 'having different ends are fixed to each other and the motor 50 is driven, the rotating plate 40 built in the motor 50 rotates. The pinion teeth 45 formed on a part of the outer circumferential surface of the rotating plate 40 reciprocate the sliding plate 30 laterally while repeatedly engaging and disengaging with the rack gear 35 on the upper surface of the sliding plate 30. A shaft 55 connected to one side of the sliding plate 30 reciprocates the disc piston 66 and at the same time the oil 69 injected into the cylinder 65 into the hole 68 of the disc piston 66 is As the shaft 55 reciprocates at a constant speed, the rack gear 35 and the pinion tooth 45 flow. Since the sliding plate 30 is reciprocated by the engagement, vibration of the rotation of the motor 50 does not occur, so that the application of the flexible PCs 70 and 70 ′ in which the sliding plate 30 is moved from the player of the optical pickup device is performed. Since it is moved similarly to the conditions, the bending resistance test of the flexible PCs 70 and 70 'is performed.

In the present invention, the bending resistance test apparatus of the flexible PC ratio for the optical pickup device has a bending radius because the sliding plate repeatedly repeating the flexible PC ratio reciprocates at a constant constant speed, and the position and height of the transfer plate to which one end of the flexible PC ratio is fixed are adjusted freely. Since it is defined as a plurality and does not restrict the free bending motion of the flexible PC with the complex bending part having irregular bending characteristics with different fixed positions at both ends, the reciprocating speed of the flexible PC with the repeated bending motion is constant without a sudden change in acceleration. Since the experiment is performed without vibration on the rotation of the motor, the durability of the test apparatus is improved, and the flexural resistance test condition is optimal for the condition where the player is installed in the player by making the experimental bending speed of the flexible PC ratio similar to the speed of the actual installation state. Experimental value of flex resistance It can improve the reliability of the flexible PC, and the flexibility experiments and evaluations can be conducted without being limited by the bending characteristics of the flexible PCs applied to the players of various products. There is an effect that can produce a player having excellent dynamic characteristics and durability.

Claims (3)

Rectangle base frame (1) made of metal formed with projections (5) on one side, support rods 20 standing up on all sides of the base frame (1), rails (25) installed on the support rods 20 and The slide spring 30 is fitted to the rail 25 and the leaf spring 16 is installed on the lower surface thereof to which one end of the flexible PCB 70 and 70 'is fixed, and connected to one side of the sliding plate 30. And a constant speed maintenance unit 60 installed on the base frame 1, a rack gear 35 formed transversely from an upper surface of the sliding plate 30, and engaged with the rack gear 35. The pinion tooth 45 has a rotary plate 40 machined on one outer circumferential surface, a motor 50 installed on the base frame 1 to drive the rotary plate 40, and a magnet on the upper surface of the base frame 1. And the height is variable, characterized in that consisting of the transfer plate 10 is fixed to the other end of the flexible PC 70, 70 'on the upper surface Bending resistance test of the flexible PCB apparatus for the optical pickup device. The hypothesis according to claim 1, wherein the transfer plate 10 is formed of a magnet, and has a cylindrical fixed cylinder 12 having a projection 11 formed on a lower surface thereof, and a hypothesis in which a screw thread is formed on an outer circumferential surface thereof. Rod 14, elevating plate 15 formed on the upper end of the temporary rod 14, and a leaf spring 16 provided on the upper surface of the elevating plate 15, the flexible PC for the optical pickup device Bending resistance test apparatus. 2. The constant speed maintenance unit (60) according to claim 1, wherein the constant speed maintenance unit (60) includes a frame (62) installed on the base frame (1), a cylinder (65) provided on the frame (62), and the cylinder (65). A disc piston 66 reciprocating on an inner circumferential surface, a perforation 68 perforated in the disc piston 66 surface, an oil 69 injected into the cylinder 65 and flowing through the perforation 68, and the cylinder A shaft 55 penetrating through the 65 and the disc piston 66 and connected to one side of the sliding plate 30, and a spring 67 fitted to the shaft 55 at one side of the disc piston 66. Flexibility resistance test apparatus of flexible PC for optical pickup apparatus.