JP2017107083A - Coating apparatus, lens drive module assembling apparatus, coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble articles with high accuracy and high efficiency.SOLUTION: A coating apparatus 70 for coating an adhesive between a lens unit LL and a drive unit KK comprises: a drive unit holding part 76 for holding the drive unit KK; an output terminal 77U contacting an input terminal of the drive unit KK to supply electric power; an electric power controller 90 for controlling the electric power supplied from the output terminal 77U; and a dispenser DP for coating the adhesive at a predetermined position. In the coating apparatus 70, the dispenser DP coats the adhesive between the lens unit LL and the drive unit KK in the state that the electric power is supplied to the drive unit KK by the output terminal 77U.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lens driving module assembling apparatus and the like for assembling an article by combining a lens portion and a driving portion.

  Optical modules used in digital cameras and smartphones require various parts to be assembled with high precision in order to capture high-definition images. This optical module is known in which a lens driving module for forming an image of a subject is integrally combined with a semiconductor element (imaging element) such as a CCD or CMOS (see, for example, Patent Document 1). The lens driving module includes a lens unit and a driving unit such as a VCM (voice coil motor unit) that moves the lens unit.

  When assembling this optical module, the chart is picked up by the image pickup device via the lens drive module, the position of the lens drive module is adjusted in the optical axis direction with respect to the image pickup device while looking at the image, and at the just focus position. The lens driving module is fixed to the image sensor.

  Further, in focusing between the image sensor and the lens driving module, a focusing process for focusing the lens driving module on a reference (master) image sensor different from the image sensor, and a just focus obtained by the focusing process. A just focus position reproduction process in which the image pickup element and the lens driving module are arranged based on the position, and a fixing process in which the image pickup element and the lens arranged at a predetermined position by the just focus position reproduction process are fixed.

  An optical axis adjusting device is used to align the optical axes of the two optical components. In this optical axis adjusting device, shift adjustment for matching the optical axes of both optical components on a predetermined plane and tilt adjustment for making the optical axes of both optical components coaxial are performed (for example, Patent Document 2). reference).

JP 2010-114731 A JP 2008-46630 A

  Although recent optical modules have been required to capture even higher-definition images, there is a limit to improving the assembly accuracy of the lens driving module and the image sensor.

  On the other hand, the lens drive module itself is assembled by fixing the lens portion and the driven portion of the VCM that moves the lens portion with an adhesive (for example, an ultraviolet curable resin). According to this, there is a possibility that a higher definition image can be obtained by improving the assembly accuracy of the lens unit and the drive unit. However, since the miniaturization of the lens driving module is remarkably progressing, it is not easy to improve the assembly accuracy of the lens unit and the VCM. Further, as described above, when trying to improve the assembly accuracy of the lens unit and the drive unit, it takes a long time to position each other, and there is a problem that the assembly efficiency deteriorates.

  Furthermore, conventionally, after the assembly of the lens drive module is completed, the lens drive module is checked for scratches and dust attached to the lens of the lens drive module by visual inspection, etc. However, there was a problem that the mass production efficiency deteriorated because all of the VCM including the normal VCM had to be discarded.

  In view of such circumstances, the present invention intends to provide an adhesive application device and the like that can improve the assembly accuracy of a lens driving module.

  The present invention that achieves the above object provides a coating apparatus that applies an adhesive between the lens unit and the drive unit when the lens drive module is assembled by combining the lens unit and the drive unit that moves the lens unit. A driving unit holding unit that holds the driving unit combined with the lens unit, an output terminal that abuts an input terminal of the driving unit and supplies power to the driving unit, and the output terminal A power controller that controls the power to be supplied; and a dispenser that applies the adhesive to a predetermined position. In the state in which power is supplied to the drive unit by the output terminal, the dispenser And an applicator for applying an adhesive between the driving unit and the driving unit.

  In relation to the coating apparatus, the dispenser applies an adhesive between the lens unit and the drive unit in a state where the position of the lens unit in the optical axis direction is stopped at the position dedicated for coating by the drive unit. It is characterized by doing.

  In relation to the coating apparatus, the driving unit includes a position detection device that detects a stop position of the lens unit in a state where the position of the lens unit in the optical axis direction is stopped at a dedicated position for coating. To do.

  In relation to the coating apparatus, the apparatus includes a determination device that determines whether or not the operation of the drive unit is normal, supplies power to the drive unit via the output terminal, operates the drive unit, and performs the determination. The dispenser applies an adhesive to the drive unit that is determined to be normal by the apparatus.

  In relation to the coating device, the device includes an appearance inspection device that inspects the appearance of the lens unit or the drive unit before applying the adhesive by the dispenser, and the appearance inspection device determines that the appearance is normal. In some cases, the dispenser applies an adhesive.

  The present invention that achieves the above object is a lens driving module assembling apparatus that assembles a lens driving module by combining a lens unit and a driving unit that moves the lens unit, the coating apparatus according to any one of the above, A position adjustment unit that relatively positions the lens unit to which the adhesive is applied and the drive unit, the position adjustment unit holding a first holding unit that holds the lens unit, and the drive unit. A lens driving module assembling apparatus, comprising: a second holding portion that adjusts, and a position adjusting mechanism that adjusts a relative position between the first holding portion and the second holding portion.

  In relation to the lens driving module assembling apparatus, the second holding part of the position adjusting unit also serves as the driving part holding part of the coating apparatus.

  The present invention that achieves the above object provides a coating method for applying an adhesive between the lens unit and the driving unit when the lens driving module is assembled by combining the lens unit and the driving unit that moves the lens unit. The output terminal is brought into contact with the input terminal of the drive unit to supply power to the drive unit, the power supplied from the output terminal is controlled by a power controller, and the drive unit is controlled by the output terminal. In the application method, an adhesive is applied between the lens unit and the drive unit by a dispenser in a state where electric power is supplied.

  According to the present invention, the lens driving module can be assembled with high accuracy and in a short time.

(A) It is front sectional drawing of the lens drive module assembled with the lens drive module assembly apparatus which concerns on embodiment of this invention, (B) is a plane sectional view. It is a top view of the lens drive module. It is a top view explaining the outline | summary of the lens drive module assembly apparatus. It is a top view explaining the holding | maintenance part for drive parts of the coating device of the lens drive module assembly apparatus. It is front sectional drawing explaining operation | movement of the drive part holding | maintenance part. It is front sectional drawing explaining operation | movement of the coating device. It is a side view explaining the positioning unit of the positioning device of the lens drive module assembling apparatus. It is a top view explaining the positioning unit. It is a partial enlarged plan view explaining operation of the positioning unit. It is a partial enlarged plan view explaining operation of the positioning unit. It is a partial expanded front view explaining operation | movement of the positioning unit. It is a partial enlarged plan view explaining operation of the positioning unit. It is a partial expanded side view explaining operation | movement of the positioning unit. It is a partial expanded front view explaining operation | movement of the positioning unit. (A) is a top view which shows a test chart, (B) is explanatory drawing which shows typically the state which image | photographed the test chart with the image pick-up element. (A)-(D) is a graph which shows the change of the shading difference value of the surrounding pixel of an image sensor, (E) is a figure for demonstrating arrangement | positioning of the surrounding pixel on an image sensor, (F) and (G) is a diagram for explaining a trigonometric function for calculating a tilt correction amount. (A)-(C) is a figure for demonstrating the change of the best focus position by the tilt control from the 1st time to the 3rd time. It is a top view explaining the outline | summary of the modification of the lens drive module assembly apparatus. It is a top view explaining the outline | summary of the modification of the lens drive module assembly apparatus.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In this specification, one direction in the horizontal plane is defined as the X direction, a direction perpendicular to the X direction in the horizontal plane is defined as the Y direction, and a direction perpendicular to the X direction and the Y direction is defined as the Z direction.

  In the present embodiment, a lens driving module assembling apparatus that assembles a lens driving module using a lens unit and a driving unit is shown.

  (Lens drive module LM)

  As illustrated in FIGS. 1 and 2, the lens driving module LM includes a lens unit LL and a driving unit KK. The lens unit LL includes a lens barrel LT and a lens element LX fixed to the lens barrel LT.

  The drive unit KK includes a lens drive motor MT, a casing QT that protects the lens drive motor MT, and an input terminal LN for supplying predetermined power to the lens drive motor MT. Here, the lens drive motor MT is a boil coil motor, and includes a drive source MT1 that generates magnetic force by a ring-shaped coil and a ring-shaped magnet MG, and uses the magnetic force of the drive source MT1 in the optical axis direction. It has a follower MT2 that moves.

  The driven portion MT2 is a cylindrical member, and a pair of L-shaped holding grooves MM for holding the lens portion LL is formed on the inner peripheral surface thereof. The holding groove MM has an axial groove MJ extending in the axial direction from the end surface, and a circumferential groove MS extending in the circumferential direction so as to be continuous with the axial groove MJ and the back side. Therefore, when the pair of engaging protrusions TT formed on the outer peripheral surface of the lens barrel LT are caused to enter along the holding groove MM, the engaging protrusion TT and the holding groove MM are engaged. In addition, the groove width and depth of the holding groove MM are set larger than the size of the engaging protrusion TT, and within the margin of the clearance until both are fixed by the adhesive. The driven part MT2 and the lens part LL can be moved relative to each other.

  Between the axial end surface of the driven portion MT2 and the peripheral surface of the lens barrel LT, an adhesive UJ is applied to a plurality of locations (here, four locations) in the circumferential direction. The adhesive UJ is cured by ultraviolet rays after adjusting the relative position of the driven portion MT2 and the lens barrel LT. As a result, in a state where the lens driving module LM is completed, the driven portion MT2 and the lens barrel LT are fixed to each other.

  When a predetermined voltage is input to the input terminal LN, the lens driving motor MT moves the lens unit LL in the optical axis direction according to the input voltage condition. For example, when no voltage is input to the input terminal LN, the lens unit LL is in an indefinite position. On the other hand, when the voltage input to the input terminal LN is V1, the lens unit LL is in the INF position (focus position at infinity). Although illustration is omitted, when the voltage input to the input terminal LN is V2, the lens unit LL is in another position (for example, a macro position).

  (Outline of the lens driving module assembling apparatus 1)

  As shown in FIG. 3, the lens drive module assembling apparatus 1 includes a coating apparatus 70, a positioning apparatus 3, and a controller 90 that outputs a control signal for controlling these apparatuses.

  The coating device 70 includes a component carrier 72, a component supply device 79A that supplies the lens portion LL and the drive unit KK to the component carrier 72 in the component supply region F-IN, and a lens drive module LM in the article carry-out region L-OUT. And a transfer device 80 for moving a plurality of component carriers 72 so as to pass through the component supply region F-IN and the item discharge region L-OUT. The transfer device 80 is a so-called turret mechanism, and has a rotary table that is rotated by a drive source such as a motor (not shown). Around the turntable, a plurality of (here, twelve) component carriers 72 are arranged at equal intervals (30 ° intervals) in the circumferential direction.

  In the article supply region F-IN, a lens portion tray SL in which a plurality of lens portions LL are stocked and a driving portion side tray SK in which a plurality of driving portions KK are stocked are arranged. The component supply device 79A sequentially takes out the lens unit LL and the drive unit KK from each tray and places them on the component carrier 72.

  Further, in the coating apparatus 70, a temporary assembly area AS and a coating area DS exist in the middle from a component supply area F-IN to a component temporary carry-out area D-OUT described later. In the temporary assembly area AS, the lens unit LL and the drive unit KK are temporarily assembled. In the application region DS, the adhesive UJ is applied to the lens unit LL and / or the drive unit KK.

  In this embodiment, the coating device 70 and the positioning device 3 are interlocked. Accordingly, in the middle from the component supply area F-IN of the coating device 70 to the article discharge area L-OUT, the component temporary discharge area D-OUT linked to the component supply area IN of the positioning apparatus 3 and the article of the positioning apparatus 3 There is an article temporary carry-in area D-IN that cooperates with the carry-out area OUT. Therefore, in the component temporary carry-out region D-OUT, the lens unit LL and the drive unit KK are transferred to the positioning device 3 side by the component supply device 65. Similarly, in the article temporary carry-in area D-IN, the lens driving module LM is transferred from the positioning device 3 to the coating device 70 by the component supply device 65.

  In the article carry-out area L-OUT, a collection tray OT that collects the correctly assembled lens drive module LM and an error tray ET that collects the incorrectly assembled lens drive module LM are arranged. The article carry-out device 79B takes out the lens driving module LM from the component carrier 72 and distributes it to the collection tray OT and the error tray ET.

  The positioning device 3 includes a plurality of position adjustment units 10, a component supply device 65 that supplies the lens unit LL and the drive unit KK to the position adjustment unit 10 in the component supply region IN, and a lens from the position adjustment unit 10 in the article unloading region OUT. An article unloading device (common to the component supply device 65) for unloading the drive module LM, and a transfer device 60 for moving the plurality of position adjustment units 10 so as to pass through the component supply area IN and the article unloading area OUT. .

  The transfer device 60 is a so-called turret mechanism, and has a rotary table that is rotated by a drive source such as a motor (not shown). Around the rotary table, a plurality of (here, eight) position adjustment units 10 are arranged at equal intervals (45 ° intervals) in the circumferential direction. Further, in the present embodiment, since the component supply area IN and the article carry-out area OUT are at the same position, the transfer device 60 revolves each position adjustment unit 10 by 360 ° to supply the position adjustment unit 10 to the component supply. Transfer from the area IN to the article unloading area OUT.

  A position adjustment area AA exists between the parts supply area IN and the article carry-out area OUT, and when the position adjustment unit 10 passes the position adjustment area AA, the relative positioning of the lens unit LL and the drive unit KK is completed. .

  (Structure of coating device)

  Next, the structure of the coating device 70 will be described. As shown in FIG. 4, the component carrier 72 in the coating apparatus 70 is mounted on a base 73, a lens portion accommodating portion 73A and a drive portion accommodating portion 73B formed on the base, and a drive portion accommodating portion 73B. And a driving unit holding unit 76 that holds the driving unit KK.

  The lens portion accommodating portion 73A is a cylindrical accommodating space, and the bottom surface side is open. As shown in FIG. 5, in the assembly area AS, a lens portion holding portion 74 is arranged to be movable up and down and rotatable. The lens portion holding portion 74 is a suction nozzle, and enters the lens portion accommodating portion 73A of the base 73 temporarily stopped here from the bottom surface side to constitute the bottom surface of the lens portion accommodating portion 73A. To do. Accordingly, the lens unit holding unit 74 can hold the lens unit LL placed on the lens unit housing unit 73A from the bottom surface side, and can move the lens unit LL up and down and rotate with respect to the optical axis. .

  Returning to FIG. 4, the driving unit holding unit 76 can be switched between holding and releasing the driving unit KK, and the driving unit KK has the bottom surface (lower surface) opened with respect to the lens unit LL. Hold. The drive unit holding unit 76 includes a first and second arms 77A and 77B for holding the drive unit KK, an arm moving unit 77M that can change the relative positions of the first and second arms 77A and 77B, and a drive. An output terminal 77U for supplying predetermined power to the unit KK, and a power controller (not shown) for outputting power under predetermined conditions from the output terminal 77U under the control of the controller 90.

  The arm moving unit 77M enables the relative positions of the first and second arms 77A and 77B to be changed between the holding state and the holding release state of the driving unit KK. As shown in FIG. 4B, when the first and second arms 77A and 77B hold the drive unit KK, the output terminal 77U is electrically connected to the input terminal LN of the drive unit KK. In the present embodiment, a biasing member 77T that biases the second arm 77B is further provided.

  The first arm 77A is formed with a recess 77D that accommodates a part of the drive unit KK, and is fixed to the base portion 77G. The second arm 77B is movable along a rail-shaped guide mechanism 77H provided on the base portion 77G, and is relatively close to and away from the first arm 77A. The arm moving part 77M is provided integrally with the base part 77G, and swings the cam 77J by a motor (not shown). Due to the lift operation of the cam 77J, the second arm 77B in contact with the cam 77J moves along the guide mechanism 77H. The biasing member 77T is a tension spring so that the second arm 77B and the cam 77J are always in close contact with each other.

  Therefore, in a state where the second arm 77B is separated from the first arm 77A, the drive unit KK is positioned in the recess 77D of the first arm 77A, and then the cam 77J is swung to move the second arm 77B to the first arm 77A. To approach. As a result, while the output terminal 77U is in contact with the input terminal of the drive unit KK, the drive unit KK is sandwiched and positioned by the first arm 77A and the second arm 77B.

  The driving unit holding unit 76 preferably includes a biasing member (not shown) that biases the output terminal 77U. As the urging member, a known urging member such as a coil spring or a leaf spring can be used. According to the biasing member, when the first and second arms 77A and 77B hold the drive unit KK, the electrical connection between the output terminal 51U and the input terminal LN can be more reliably performed.

  In this way, if the adhesive UJ is applied in a state where electric power is supplied to the drive unit KK and the driven unit MT2 is positioned at a predetermined position (application dedicated position), the axial direction of the driven unit MT2 Alternatively, the position in the direction perpendicular to the axis can be stabilized in advance, and the tip of the dispenser DP and the application location on the upper surface of the driven portion MT2 are positioned with high accuracy, and the application position and application amount of the adhesive UJ are more accurately controlled. it can. The stationary position (dedicated position for application) of the driven unit MT2 by the drive unit KK is preferably set in advance so as to match the tip of the dispenser DP at the time of application. It is also possible to control the tip of the dispenser DP after individually measuring the height of the driven part MT2 or the lens part LL.

  (Inspection operation in the pre-inspection area P-CK)

  The pre-inspection area P-CK is located in common with or upstream of the application area DS described later. In this preliminary inspection region P-CK, before applying the ultraviolet curable resin UJ to the drive unit KK and the lens unit LL, specifically, before and after performing temporary assembly in the assembly region AS described later, and before application, Electric power is supplied to the drive unit KK to determine whether or not the drive unit KK operates normally. This determination may be performed by software on the controller side that supplies power to the drive unit KK, and the operation and posture of the driven unit MT2 (or the lens unit LL) are inspected from the outside by a camera or a laser displacement meter. You may judge by. When it is determined that the drive unit KK is out of order, application of the ultraviolet curable resin UJ in the application region DS is avoided. As a result, it is possible to collect and maintain (reuse) the failed drive unit KK in a clean state.

  Furthermore, in the preliminary inspection region P-CK, an imaging device serving as an appearance inspection device is arranged, and the appearance inspection of the lens unit LL and / or the drive unit KK is performed using the imaging device. For example, if the controller determines that the lens unit LL and / or the driving unit KK are scratched or dust is attached based on the image captured by the imaging device, the UV curable property in the application region DS is determined. Avoid application of resin UJ itself. As a result, the lens part LL and the drive part KK that are not coated with the ultraviolet curable resin UJ can be collected in a clean state, and it is possible to maintain (reuse) these parts. In addition, since the appearance of the lens portion LL and the like can be inspected before the ultraviolet curable resin UJ is applied, whether the appearance abnormality is essentially present in the lens portion LL or the like, Since it is possible to determine whether it is caused by the coating process (including the case where the resin UJ itself adheres to the lens), it is possible to take a quick countermeasure against the appearance abnormality.

  In addition, it is also preferable to arrange this preliminary inspection area P-CK in a process after an assembly area AS described later. In this way, it is possible to determine in advance whether the lens unit LL and the drive unit KK are assembled incorrectly (for example, misalignment). In this case, for example, it is desirable to install an appearance inspection device (imaging device) below the assembled lens unit LL and drive unit KK and detect the positional relationship between them.

  (Temporary assembly operation in assembly area AS)

  In the assembly area AS, as shown in FIG. 5A, first, the driving unit holding unit 76 is opened, and the lens unit holding unit 74 enters the lens unit housing unit 73A of the base 73. Let Next, the component supply device 79A places the lens unit LL on the lens unit accommodating unit 73A. After that, as shown in FIG. 5B, the drive unit KK is placed on the drive unit accommodating unit 73B above the lens unit LL. Thereafter, the drive unit holding unit 76 is closed to pinch the drive unit KK and position it with high accuracy, and power is supplied to the drive unit KK as necessary. This power feeding has the advantage that the attitude of the driven portion MT2 is stabilized and the collision with the lens portion LL during temporary assembly can be reduced.

  As shown in FIG. 5C, the lens unit holding unit 74 raises the lens unit LL while sucking and holding the lens unit LL, and after the lens unit LL enters the driven unit MT2 of the driving unit KK, As shown in FIG. 5D, it is rotated 90 °. As a result, the pair of engaging protrusions TT formed on the outer peripheral surface of the lens barrel LT enters along the L-shaped holding groove MM, and the engaging protrusion TT and the holding groove MM are engaged. Thereafter, as shown in FIG. 5E, the lens assembly holding portion 74 is retracted downward from the base 73, whereby the temporary assembly process is completed. The driving mechanism (not shown) for moving the lens unit holding portion 74 up and down may be arranged on the back side of the base 73 and pivoted together with the base 73. A structure may be used in which the lens unit holding unit 74 is moved up and down and rotated from the outside by being fixedly installed in the assembly region AS.

  Here, the structure in which the engaging protrusion TT of the lens portion LL is inserted into the holding groove MM of the driven portion MT2 is illustrated, but the present invention is not limited to this. There are various coupling structures of the lens unit LL and the driving unit KK. For example, a male screw is formed on the outer periphery of the lens unit LL, and a female screw is formed on the inner periphery of the driving unit KK. Anyway. In any case, the lens unit LL and the driven unit MT2 may be relatively moved in accordance with the coupling structure of the parts.

  (Application operation in application area DS)

  As shown in FIGS. 6A and 6B, in the application region DS, the dispenser DP applies the ultraviolet curable resin UJ as an adhesive to a predetermined position that is a boundary between the lens barrel LT and the driven portion MT2. To do. In the first application region DS1 in FIG. 3, the UV curable resin UJ is applied to one place (first position) in the circumferential direction of the lens barrel LT, and in the second application region DS2, The UV curable resin UJ is applied to the second position having a phase difference of 90 °, and the UV curable resin UJ is applied to the third position having a phase difference of 90 ° with respect to the second position in the third application region DS3. In the fourth application region DS4, the ultraviolet curable resin UJ is applied to the fourth position having a phase difference of 90 ° with respect to the third position. As a result, the ultraviolet curable resin UJ is applied to four places in the circumferential direction around the lens barrel LT (see FIG. 2). As already described, since the adhesive UJ is applied in a state where power is supplied to the drive unit KK and the driven unit MT2 is accurately positioned at a predetermined position, the displacement of the application position is suppressed. it can. In particular, when a camera shake correction mechanism using a spring wire or the like is built in the drive unit KK, the driven unit MT2 swings due to slight external vibration when power is not supplied to the drive unit KK. The application position tends to shift. Accordingly, by supplying power to the drive unit KK at the time of application as in the case of the application apparatus 70, the vibration of the camera shake correction mechanism can be attenuated, so that the deviation of the application position can be suppressed.

  In particular, in the present embodiment, since the drive unit holding unit 76 holds the drive unit KK and maintains the supply of electric power, the plurality of application regions (the first application region DS1 to the fourth application region DS4) move together. Even if the coating process is dispersed in a plurality, the posture of the drive unit KK can always be accurately maintained. For example, if the power supply to the drive unit KK is turned off during the transfer, a certain amount of time is required to stabilize the holding posture of the drive unit KK again, so that the coating efficiency is likely to decrease.

  Further, in the present embodiment, the four component carriers 72 are simultaneously stopped between the first application region DS1 to the fourth application region DS4 and the application operation is simultaneously advanced, so that the application efficiency is dramatically improved. In addition, it is desirable to arrange the application confirmation area CK after the application area DS, and take an image of the ultraviolet curable resin UJ with a camera arranged above to confirm whether or not the application is correctly performed. In this way, it becomes possible to discharge the defective application of the UV curable resin UJ in advance, and even if the parts are guided to the positioning device, assembly (UV irradiation to the resin UJ) can be avoided. The collection and reuse of defective products can be facilitated. Moreover, the frequency | count of application | coating and an application order are not limited to this, Other procedures may be sufficient.

  (Structure of positioning device)

  Next, the structure of the positioning device 3 will be described. As shown in FIG. 3, in the positioning device 3, the position adjustment unit 10 moved by the transfer device 60 is from the upstream side toward the downstream side, the component carry-in area IN, the lens measurement area NPU, the grip area GL, the first It passes through the position adjustment area AA1, the second position adjustment area AA2, the third position adjustment area AA3, the first curing area UV1, the second curing area UV2, and the article carry-out area OUT. Since these regions are arranged at intervals of 45 °, the eight position adjustment units 10 are simultaneously stopped in any of these regions, and the processes of the respective regions are performed simultaneously. The entire first position adjustment area AA1, the second position adjustment area AA2, and the third position adjustment area AA3 are defined as the position adjustment area AA, and the entire first hardening area UV1 and the second hardening area UV2 are set as the hardening area UV. It is defined as

  As shown in FIGS. 7 and 8, the position adjustment unit 10 of the positioning device 3 includes a first holding unit 20 that holds the lens unit LL and a second holding unit that is disposed on the base 5 and holds the driving unit KK. Part 30, and a position adjusting mechanism 40 that is disposed on the base 5 and adjusts the relative positions of the first holding part 20 and the second holding part 30.

  (Detailed structure of the first holding part)

  The first holding unit 20 is a so-called chuck mechanism, and the first arm 22 and the second arm 24 extending in the radial direction of the rotary table, and the first arm 22 and the second arm 24 are connected in the tangential direction of the rotary table or It has an arm moving part (first opening / closing mechanism) 26 that opens and closes in the circumferential direction. The arm moving unit 26 is a slide guide, and slides the first arm 22 and the second arm 24 in the horizontal direction so as to approach and separate from each other. The opening / closing method may employ other methods such as turning.

  As shown in FIG. 12A, partial arc-shaped concave portions 22 </ b> A and 24 </ b> A for holding the lens portion LL are formed at the tips of the first arm 22 and the second arm 24. Therefore, the lens portion LL is stably held by bringing the concave portions 22A and 24A into contact with the outer peripheral surface of the lens barrel LT of the lens portion LL.

  Further, an adhesive escape portion 25 </ b> A is formed at the tips of the first arm 22 and the second arm 24. The adhesive relief portion 25A is a notch that extends further outward in the radial direction from the recesses 22A and 24A. As shown in FIG. 12B, in a state where the lens portion LL is held by the first arm 22 and the second arm 24, when viewed from the optical axis direction of the lens portion LL, the adhesive escape portion 25A causes the lens Interference (covering state) between the UV curable resin (adhesive) UJ applied to a plurality of locations around the portion LL and the arms 22 and 24 is avoided. Here, the case where the adhesive escape portion 25A is configured by the notch is illustrated, but a space (for example, a gap) in which the first arm 22 and the second arm 24 do not exist in the first place is used as the adhesive escape portion 25A. You can also. Specifically, a structure is adopted in which four arms with different phases in the circumferential direction and the application position of the UV curable resin UJ are brought closer to the inside in the radial direction and the lens portion LL is held by the tip of each arm. May be.

  Furthermore, in the present embodiment, a pressing protrusion escape portion 25 </ b> B is formed at the tips of the first arm 22 and the second arm 24. The pressing protrusion escape portion 25B utilizes a gap formed between the first arm 22 and the second arm 24, that is, a space where no arm exists. As shown in FIG. 12C, the pressing protrusion escape portion 25B causes interference between the pressing protrusion 37B (details will be described later) and the arms 22 and 24 when viewed from the optical axis direction of the lens portion LL. Avoided.

  As shown in FIG. 13, the portion that holds the lens portion LL in the first holding portion 20 is configured by a very thin member when viewed from the horizontal direction. If it does in this way, when the lens part LL is hold | maintained, even if the 1st holding part 20 does not protrude from the upper end surface of the lens part LL, even if it protrudes, it will be restrict | limited to the protrusion amount within 5 mm. Thereby, since the pressing protrusion 37B (details will be described later) can be made compact, it can be efficiently irradiated with ultraviolet rays and cured (see FIG. 13D).

  (Detailed structure of the second holding part)

  As shown in FIG. 8, the second holding unit 30 presses the end surface in the optical axis direction of the drive source side holding unit 31 that holds the housing QT side or the drive source MT1 side in the drive unit KK and the driven unit MT2. And a pressing portion 36 that defines the position of the driven portion MT2 in the optical axis direction.

  As shown in FIG. 9, the drive source side holding portion 31 is a so-called chuck mechanism, and the first arm 32 and the second arm 34 that are movable in the tangential direction of the rotary table, the first arm 32, and the second arm 32. An arm moving part (second opening / closing mechanism) 33 for opening and closing the arm 34 is provided. The arm moving unit 33 is a slide guide, and slides the first arm 32 and the second arm 34 in the horizontal direction so as to approach and separate from each other.

  At the tips of the first arm 32 and the second arm 34, rectangular recesses 32A and 34A for holding the drive unit KK are formed. Therefore, the drive source MT1 side of the drive unit KK is held by bringing the recesses 32A and 34A into contact with the outer peripheral surface of the housing QT of the drive unit KK. In addition, at least one of the first arm 32 and the second arm 34 is supplied with power under a predetermined condition from the output terminal 35 under the control of the output terminal 35 for supplying predetermined power to the drive unit KK and the controller 90. A power controller (not shown) for output.

  The pressing part 36 has a pressing body 37 that presses the end surface of the driven part MT2 in the optical axis direction, and an advance / retreat mechanism 38 that moves the pressing body 37 in the horizontal direction (radial direction of the rotary table) to advance and retreat upward of the driving unit KK. And a vertical movement mechanism 39 that moves the pressing body 37 in the optical axis direction.

  As shown in FIG. 13, the pressing body 37 has a mortar-shaped opening 37A having a wide upper edge and a narrow lower edge, and is further continued to the lower edge of the opening 37A. A plurality of rod-like pressing protrusions 37B protruding in the shape are provided. In the present embodiment, two pressing protrusions 37B are formed with a phase difference of 180 ° (see FIG. 12). As shown in FIGS. 13A and 13B, the advancing / retreating mechanism 38 moves the pressing body 37 forward and backward in the radial direction of the rotary table so that the opening 37A and the pressing protrusion 37B enter above the driving unit KK. Then, the drive unit KK is retracted from above. As shown in FIGS. 13B and 13C, the vertical movement mechanism 39 moves the pressing body 37 located above the drive unit KK up and down so as to approach and separate from the drive unit KK. As shown in FIG. 14B, when the pressing body 37 approaches the drive unit KK, the lower end (protruding end) of the pressing projection 37B comes into contact with the upper end of the driven portion MT2, and the driven portion MT2 is moved to the infinite end (INF end). ) The pressing protrusions 37B that press the driven portion MT2 do not interfere with each other because they are located in the pressing protrusion escape portion 25B of the first holding portion 20.

    (Detailed structure of position adjustment mechanism)

  Returning to FIGS. 7 and 8, the position adjustment mechanism 40 supports the first holding unit 20 and can individually adjust the position and posture of the first holding unit 20, and is fixed to the base 5. X shift mechanism 40XS, Y shift mechanism 40YS fixed to the slide member of X shift mechanism 40XS, Z shift mechanism 40ZS fixed to the slide member of Y shift mechanism 40YS, and slide of Z shift mechanism 40ZS A Y tilt mechanism 40YT fixed to the member, a Z tilt mechanism 40ZT fixed to the tilt table of the Y tilt mechanism 40YT, and an X tilt mechanism (rotation mechanism) 40XT fixed to the tilt table of the Z tilt mechanism 40ZT Have. The first holding unit 20 is installed on the tilt table of the X tilt mechanism 40XT. Note that the X axis, Y axis, and Z axis, which are the rotation centers of the tilt, are set to the approximate center of the lens portion LL.

  Therefore, the position adjustment mechanism 40 is configured by stacking the X, Y and Z shift mechanisms 40XS, 40YS, and 40ZS along the Z-axis direction, and further, the X, Y, and Z tilt mechanisms 40XT toward the radially outer side of the rotary table. , 40YT, 40ZT are stacked. The Y and Z tilt mechanisms 40YT and 40ZT are so-called gonio stages.

  Although not particularly illustrated, the drive mechanism of the X shift mechanism 40XS includes an elastic member (for example, a spring or rubber) that connects the base side and the slide member and urges the slide member to one side, and an urging force of the elastic member. It is comprised by the drive source (for example, a servomotor or a solenoid) which moves a slide member with a cam etc. against this. This structure is similarly applied to the Y and Z shift mechanisms 40YS and 40ZS.

  Although not particularly illustrated, the drive structure of the X tilt mechanism 40XT includes an elastic member (for example, a spring or rubber) that connects the base side and the tilt table to swing the tilt table to one side, and an urging force of the elastic member. Against this, it is constituted by a drive source (for example, a servo motor or a solenoid) that swings the tilt table to the opposite side by a cam or the like. This structure is similarly applied to the Y and Z tilt mechanisms 40YT and 40ZT. As described above, when the elastic member and the cam are combined as the drive structure, the position adjustment mechanism 40 corresponding to 6 axes can be driven with a very compact configuration as a whole.

  According to the position adjustment mechanism 40 of the present embodiment, the Y and Z tilt mechanisms 40YT and 40ZT approach the first holding unit 20, so that the tilt radii RY and RZ can be reduced. The control error in can be reduced.

  (Positioning device operation)

  Next, operations in each region of the positioning device 3 shown in FIG. 3 will be described.

  Component carry-in area IN: As shown in FIGS. 9A to 9C, the lens unit LL and the drive unit KK are supplied from the coating device 70 to the position adjustment unit 10. Here, the drive unit KK is held by the second holding unit 30. In the upstream application device 70, the lens unit LL and the drive unit KK are combined with each other, and the ultraviolet curable resin UJ is applied in advance to predetermined positions of the lens unit LL and the drive unit KK. In this example, the lens unit LL and the drive unit KK are supplied in a combined state. However, the lens unit LL and the drive unit KK are separately supplied, and an adhesive is applied on the rotary table. May be. Of course, as illustrated in the present embodiment, the entire device including the coating device 70 can be defined as a positioning device.

  Lens measurement area NPU: A laser displacement meter (ranging device) (not shown) is arranged above the lens measurement area NPU and measures the height of the top surface of the lens element LX of the lens unit LL. Here, the distance measuring device estimates the actual height of the top surface by measuring the heights of four locations around the virtual optical axis. This top surface height information is used in a vacuum process in the grip region GL.

  Grip region GL: The lens unit LL is held by the first holding unit 20. At this time, as shown in FIG. 11A, the top surface of the lens element LX of the lens portion LL is adsorbed by the vacuum chuck BC in which the grip region GL is arranged, and held as shown in FIG. The lens portion LL is lifted up to a predetermined grip height within the range allowed by the groove MM, and then the lens portion LL is held by the first holding portion 20 as shown in FIG. 11C (FIG. 12A). (See (B)). After the lens unit LL is held by the first holding unit 20, the negative pressure of the vacuum chuck BC is released and retracted upward (see FIG. 14A).

  After that, in the grip region GL, the VCM is driven by supplying power to the drive unit KK via the drive source side holding unit 31, and FIGS. 10 (B), 13 (A), (B), and 14 (B). As shown in FIG. 4, the driven portion (lens carrier) MT2 is pushed in the farthest (to the INF end) by the pressing body 37 of the pressing portion. That is, the driven unit MT2 is set to the deepest stop position when the VCM is ON. Note that the pressing operation by the pressing unit and the power supply to the driving unit KK are continued until the fixed region UV described later.

  First position adjustment area AA1: The relative angle of each reference axis of the lens unit LL and the drive unit KK is adjusted (this is called tilt adjustment). Specifically, as shown in FIGS. 7 and 13C, an optical axis adjustment device (chart device) W is arranged above the first position adjustment area AA1, and the reference imaging element MC is arranged below. Is arranged to be movable up and down. When the lens unit LL and the drive unit KK are inserted between the optical axis adjustment device W and the reference image sensor MC, the reference image sensor MC rises and approaches the lens unit LL. Next, a chart image of the optical axis adjustment device W is picked up by the reference image pickup device MC through the lens unit LL. As shown in FIG. 14C, using this imaging result (imaging information), the position adjustment mechanism 40 controls the tilt of the first holding unit 20 and sets each reference axis of the lens unit LL and the driving unit KK. Parallel to each other. After the adjustment, the reference image sensor MC is lowered.

  Second position adjustment area AA2: adjusts the relative position in the sliding direction (XY plane direction) perpendicular to the approaching or separating direction (Z-axis direction) of the lens unit LL and the driving unit KK (this is the X-Y direction). Called Y adjustment). Specifically, a camera (not shown) is disposed above the second position adjustment area AA2, and the lens unit LL and the drive unit KK are simultaneously photographed from above, and the image is analyzed, whereby the lens unit is analyzed. The shift in the XY plane direction of the LL and the drive unit KK is calculated. Using this calculated information, as shown in FIG. 14D, the position adjustment mechanism 40 controls the slide of the first holding unit 20 within the XY plane, and the X− of the lens unit LL and the driving unit KK. The relative position in the Y plane direction is adjusted.

  Third position adjustment area AA3: The relative position of the lens unit LL and the drive unit KK in the perspective direction (Z-axis direction) is adjusted (this is referred to as focus adjustment). Specifically, as shown in FIGS. 7 and 13C, an optical axis adjustment device (chart device) W is arranged above the third position adjustment area AA3, and the reference image sensor MC is arranged below. Is arranged to be movable up and down. When the lens unit LL and the drive unit KK are inserted between the optical axis adjustment device W and the reference image sensor MC, the reference image sensor MC rises and approaches the lens unit LL. Next, a chart image of the optical axis adjustment device W is picked up by the reference image pickup device MC through the lens unit LL. As shown in FIG. 14E, using this imaging result (imaging information), the position adjustment mechanism 40 controls the first holding unit 20 in the Z-axis direction, until the lens unit is in the just focus position. The distance between the LL and the drive unit KK is adjusted. At this time, tilt adjustment and XY adjustment are also finely adjusted as necessary. After the adjustment, the reference image sensor MC is lowered.

  Fixed region UV (first cured region UV1 and first cured region UV2): As shown in FIGS. 10C, 12C, 13D, and 14F, the ultraviolet irradiation device U The ultraviolet curable resin UJ applied to four places between the lens unit LL and the drive unit KK is cured by irradiating ultraviolet rays from four directions. For example, irradiation is performed for, for example, 5 seconds in each of the first curing region UV1 and the first curing region UV2. As a result, the lens unit LL and the driven unit MT2 of the driving unit KK are fixed to each other. After the curing, the power supply to the VCM is turned off, and the pushing of the driven portion (lens carrier) MT2 by the pressing portion 36 is released. The opening operation after curing may be performed while the rotary table is rotating. In addition, in the coating device 70, when it is determined that the application of the ultraviolet curable resin UJ is defective, it is preferable to stop (avoid) ultraviolet irradiation only for the component. By doing in this way, since it can collect | recover, without fixing the lens part LL and the drive part KK, reuse of inferior goods can be facilitated.

  Article unloading area OUT: The completed lens driving module LM is unloaded to the coating device 70 side. Although not shown here, the process includes a step of securing an air blow area downstream of the fixed area UV, blowing air to the lens driving module LM, and scattering dust adhering to the lens portion LL and the like. It is preferable. Further, it may include a step of inspecting whether or not dust is attached to the lens unit LL by imaging the lens unit LL with a camera or the like at any place (preferably in the article unloading area OUT) of all the steps. preferable.

  (Details of position adjustment area AA)

  The optical axis adjustment device (chart device) W provides a test chart that is imaged through the lens unit LL using the reference imaging element MC that is inserted below the lens unit LL. In the controller 90, image analysis of the photographed image of the test chart is performed, and deviation amounts (tilt error, XY error, focus error) between various optical axes of the lens unit LL and the reference image sensor MC can be calculated. Further, the optical axis adjustment device W outputs the correction condition of the position adjustment unit 10 from the calculated deviation amount. Here, the correction condition is for performing optical axis adjustment between the lens unit LL and the reference imaging element MC. Specifically, the movement direction in the X direction, the Y direction, and the Z direction, the amount of movement thereof, , The swing direction and the swing angle around the X, Y, and Z axes.

  In the present embodiment, the relative positional relationship between the reference image sensor MC and the drive unit KK is determined by the transfer device 80, the second holding unit 30 of the position adjustment unit 10, the vertical movement unit of the reference image sensor MC, and the optical axis adjustment device W. It has been adjusted with high accuracy in advance by mechanical setting. Therefore, if the relative position of the lens unit LL is controlled with high accuracy using the reference image sensor MC as a reference, the relative position of the lens unit LL and the driving unit KK is adjusted as a result.

  An example of the test chart F is shown in FIG. On the test chart F, a striped pattern F1 is drawn. In the video obtained by photographing the striped pattern F1, for example, when the focus is matched, the density of the video (the difference between the black and white of the output signal) becomes large, and when the focus is mismatched (blurred), the density is shaded. Becomes smaller. Further, the test chart F has a cross pattern F2 for determining the center thereof. Thereby, the plate center F3 can be determined. Further, the rotation angle around the Z axis can be determined by the angle of the stripe pattern F1 or the cross pattern F2.

  FIG. 15B schematically shows a state in which the test chart F is photographed by the reference image sensor MC. The data area (frame) imaged by the reference image sensor MC is defined as G, and is defined as the frame center E of the data area G, and there are a plurality of three or more locations (here, four locations) around the frame center E. Are defined as peripheral pixels A to D. The correction condition calculation device calculates errors Gxs and Gys in the XY directions between the frame center E and the plate center F3 projected in the data area G. Also, an error Gzt around the Z axis is calculated from the difference between the intersecting pattern F2 displayed in the data area G and the frame reference lines KX and KY in the X direction and Y direction of the data area G. These errors Gxs, Gys, and Gzt are correction conditions for X shift, Y shift, and Z tilt (rotation around the Z axis) for aligning the center of the lens unit LL with the center of the chart unit 61.

  Here, the errors Gxs and Gys in the XY direction between the frame center E and the plate center F3 projected in the data area G are used as the X shift and Y shift correction conditions, but the present invention is not limited to this. Not. For example, the center of the lens unit LL is the brightest position in the image of the reference image sensor MC, and gradually becomes darker in a ring shape as it spreads around. Therefore, by analyzing the image captured by the reference image sensor MC, the brightest region in the data region G is determined as the center (lens center) FM of the lens portion LL, and the lens center FM and the data region G are determined. It is also preferable that the errors Gxs and Gys in the X direction and the Y direction with respect to the frame center E are used as correction conditions for X shift and Y shift. This technique is effective when the lens center of the lens portion LL does not coincide with the center of the focus determination pattern plate F.

  When X or Y tilt adjustment or focus adjustment is performed, the position adjustment unit 10 raises the lens unit LL in the Z-axis direction (moves in the plus direction), and performs reference imaging of the test chart F at a plurality of locations in the Z-axis direction. Imaging is performed with the element MC. The correction condition calculation device calculates a density difference value (brightness / darkness difference value) BW in the peripheral pixels A to D, and calculates a tilt error from an output fluctuation of the density difference value BW along the movement in the Z direction. Specifically, as shown in FIGS. 16A to 16D, for each of the peripheral pixels A to D, the peak point of the density difference value (light / dark difference value) BW accompanying the movement in the Z direction (this is the best). AZ, ZB, ZC, and ZD of the Z direction position (referred to as the Z direction focus position) of the focus) are determined. When the best focus timing, that is, the Z-direction focus positions ZA, ZB, ZC, and ZD are deviated from each other in each of the peripheral pixels A to D, the angle between the optical axis of the reference imaging element MC and the optical axis of the lens unit LL Since it can be defined that there is a difference, the lens unit LL is tilt-controlled around the Y axis and the X axis so that the Z-direction focus position almost coincides with all the peripheral pixels A to D.

  For example, as shown in FIG. 16E, analysis is performed on the pixel A and the pixel B having the actual distance Xab in the X-axis direction, and the Z-direction focus position of the pixel A and the pixel B as shown in FIGS. Assume that the actual distance Zab (= ZA−ZB) in the Z-axis direction is calculated as the difference between the two. By calculating the inclination angle of the hypotenuse of the right triangle having the two actual distances Xab and Zab as the adjacent sides by the relational expression in FIG. Similarly, as shown in FIG. 16E, the pixels A and C having the actual distance Yac in the Y-axis direction are analyzed, and the Z-direction focus of the pixels A and C is analyzed as shown in FIGS. Assume a case where an actual distance Zac (= ZA−ZC) in the Z-axis direction as a position difference is calculated. Further, by calculating the inclination angle of the hypotenuse of the right triangle having the two actual distances Yac and Zac as the adjacent sides according to the relational expression of FIG. 16G, the amount of inclination deviation Gxt of the optical axis around the X axis is determined. it can. These tilt shift amounts Gyt and Gxt are correction conditions for Y tilt and X tilt.

  Here, the case where the correction conditions for the X tilt and the Y tilt are calculated using the Z-direction focus positions ZA, ZB, and ZC of the three pixels A to C is illustrated. That is, when calculating the X tilt and the Y tilt, it is possible to use at least three peripheral pixels A to C constituting the apex of the triangle. On the other hand, it is also possible to calculate using four pixels A to D or more. For example, as shown in FIG. 16E, the average value (ZA + ZC) / 2 of the Z-direction position of the pixel A and the pixel C existing at the same position in the X direction, and the pixel B existing at the same position in the X direction Using the average value (ZB + ZD) / 2 of the pixels D, the amount of tilt deviation around the Y axis (Y tilt correction condition) may be calculated. The same applies when calculating the amount of tilt deviation around the X axis.

  The average value of the Z-direction focus positions of the peripheral pixels A to D is the final Z shift setting condition Gzt. Since the Z shift is an axis for performing a search operation to calculate other correction values, the Z shift is not a concept of correction conditions but a final setting condition.

  As a result, correction conditions for the X shift, Y shift, Z shift, X tilt, Y tilt, and Z tilt (setting conditions for the Z shift) can be output by calculating the correction conditions using the optical axis adjustment device W. it can. In addition, here, when determining correction conditions for X tilt and Y tilt, a case where geometric calculation is performed using a trigonometric function using a Z-direction focus position difference and an inter-pixel distance between a plurality of pixels is illustrated. However, it goes without saying that the present invention is not limited to this method.

  <Pre-setting of reference image sensor>

  Before the positioning device 3 is operated, the shift calibration condition and the tilt calibration condition of the reference image sensor MC are calculated through image analysis on the captured image of the test chart by the reference image sensor MC. The shift calibration condition of the position adjustment unit 10 here is for making the optical axis of the test chart coincide with the optical axis of the reference imaging element MC on a predetermined plane. For example, when the optical axis of the test chart and the optical axis of the reference imaging element MC are made to coincide on the XY plane, the shift calibration conditions are X shift calibration conditions Gxs, Y that are the movement direction and the movement amount in the X direction to the Y direction. This is the shift calibration condition Gys. Further, the tilt calibration condition is for making the XY axis of the reference image sensor MC coincide with the XY axis of the test chart, and is a Z tilt calibration condition Gzt that is a rotation direction and a rotation amount around the X axis. .

  The controller 90 calculates a shift calibration condition and a tilt calibration condition. In response to this result, the fixed position of the reference image sensor MC is manually adjusted. Specifically, shift adjustment is performed in the X direction and the Y direction so that the optical axis of the test chart coincides with the optical axis of the reference image sensor MC on a predetermined plane (for example, the XY plane). Similarly, the tilt adjustment in the Z direction is performed so that the XY axis of the reference image sensor MC and the XY axis of the test chart coincide with each other. This completes the X-shift adjustment, Y-shift adjustment, and Z-tilt adjustment in the pre-setting stage.

  <Detailed control in the first position adjustment area AA1>

  In the first position adjustment area AA1, the optical axis adjustment device W is used to shoot a test chart for adjusting X tilt, Y tilt, and Z shift. In this case, as shown in FIG. 16A, the test chart is photographed at a plurality of positions in the Z direction while moving the first holding unit 20 in the Z direction. The controller 90 calculates the tilt correction condition of the position adjustment unit 10 based on the image analysis with respect to the photographing result. The tilt correction condition is a condition for adjusting the attitude of the first holding unit 20 so that the optical axis of the lens unit LL and the optical axis of the reference imaging element MC are coaxial, and the tilt radius RX described above is used. , RY. The tilt correction condition of the position adjustment unit 10 is, for example, the X tilt correction condition Gxt and the Y tilt correction condition Gyt that are the swing direction and the swing amount about the X axis to the Y axis, and the Z shift correction condition is Z This is the Z shift correction condition Gzs that is the direction of movement and the amount of movement. Note that the Z shift correction condition Gzs is a value that is used only during the final positioning (final stage) of the reference image sensor MC, and therefore need not be used here. The controller 90 controls the position adjustment unit 10 according to the tilt correction condition.

  After the tilt adjustment of the first holding unit 20 is completed, the controller 90 takes an image of the test chart using the optical axis adjustment device W, and again calculates tilt correction conditions similar to those described above.

  After calculating the tilt correction condition, the controller 90 determines whether or not the second tilt correction condition is within an allowable range by a built-in determination unit. That is, it is determined whether or not the X tilt correction amount Gxt and the Y tilt correction amount Gyt (in other words, the shift amount of the optical axis between the lens unit LL and the reference image sensor MC) are within the allowable range. This determination may be made using the correction amount Gxt and the Y tilt correction amount Gyt, but it is also possible to make the determination based on the deviation amounts of the Z-direction focus positions ZA to ZD already described.

  When it is determined that the second tilt correction condition is within the allowable range of light irradiation, the second position adjustment region is not performed without performing the tilt adjustment of the first holding unit 20 according to the second tilt correction condition. Move to AA2. On the other hand, if it is out of the allowable range, the above steps are repeated after performing the tilt adjustment under the tilt correction condition. That is, (1) execution of predetermined determination processing and setting processing regarding the recalculated tilt correction condition, (2) tilt adjustment of the first holding unit 20 reflecting the results of the determination processing and setting processing, and (3) tilt correction. Repeat the recalculation of conditions.

  <Detailed control in the second position adjustment area AA2>

  Here, centering of the lens unit LL is performed by a camera disposed above. Since the tilt control of the lens unit LL is completed in the first position adjustment area AA1, since the tilt of the optical axis of the lens unit LL is reduced, accurate centering can be performed. If the lens unit LL is inclined with respect to the optical axis of the camera, the imaging result becomes elliptical and accurate centering becomes difficult.

  <Detailed control in the third position adjustment area AA3>

  Here, the optical axis adjusting device W is used to shoot a test chart for adjusting preliminary X tilt and Y tilt and Z shift. In this case, as shown in FIG. 16A, the test chart is photographed at a plurality of positions in the Z direction while moving the first holding unit 20 in the Z direction. The controller 90 calculates the tilt correction condition and the Z shift correction condition (focus condition) of the position adjustment unit 10 based on the image analysis on the photographing result. However, since the tilt correction condition has already been adjusted in the first position adjustment area AA1, it is almost within the determination threshold value.

  Therefore, in the third position adjustment area AA3, the position adjustment unit 10 is focus-controlled according to the Z shift correction condition Gzs.

  After the focus adjustment of the first holding unit 20 is completed, the controller 90 takes an image of the test chart again by using the optical axis adjustment device W, and again calculates the Z shift correction condition and the tilt correction condition as described above. .

  After calculating the Z shift correction condition, the controller 90 determines whether or not the second Z shift correction condition is within the allowable range by a built-in determination unit. That is, it is determined whether or not the Z shift correction amount is within an allowable range. When it is determined that the second and subsequent Z shift correction conditions are within the allowable range of light irradiation, positioning is performed without performing the Z shift adjustment of the first holding unit 20 according to the second Z shift correction condition. To move to the fixed region UV. On the other hand, when the Z shift correction condition is out of the allowable range, in order to repeat the above process, the focus control is performed based on the Z shift correction condition, and then the test chart is photographed again. (1) Execution of predetermined determination processing and setting processing regarding the recalculated Z shift correction condition, (2) Z shift adjustment of the first holding unit 20 reflecting the results of the determination processing and setting processing, (3) The recalculation of the Z shift correction condition is repeated.

  FIG. 17 shows a diagram in which the Z-direction focus positions of the peripheral pixels A to D analyzed by the controller 90 in the first position adjustment area AA1 are displayed in an overlapping manner. 17A is after the first tilt correction, FIG. 17B is after the second tilt correction, and FIG. 17C is after the third tilt correction. In the first time, the Z-direction focus positions ZA to ZD are greatly shifted, but in the second time, the Z-direction focus positions ZA to ZD approach rapidly. In the third time, the Z-direction focus positions ZA to ZD almost coincide. In the third time, the shift amount of the Z direction focus positions ZA to ZD falls within the range of the predetermined range AP, so that the process proceeds to <second position adjustment area AA2>. As can be seen from FIG. 17, in the first position adjustment area AA1, the search range Zsr for imaging while moving the reference imaging element MC in the Z direction needs to be set wide in the first time, but the second After the first time, it is preferable that the average value and the center of the Z-direction focus positions ZA to ZD are set narrow, and the imaging time can be shortened.

  As described above, according to the lens drive module assembling apparatus 1 of the present embodiment, the plurality of position adjustment units 10 move together with the lens unit LL and the drive unit KK from the component supply area IN to the article carry-out area OUT. Since each position adjustment unit 10 completes the relative positioning of the lens unit LL and the drive unit KK in the position adjustment area AA in the meantime, the assembly efficiency can be dramatically improved. In particular, since a single path (assembly path) through which each part to be assembled passes can be unified, it becomes possible to quickly identify the cause when trouble occurs on the assembly path. When the relative positioning is performed by supplying the lens unit LL and the driving unit KK to the plurality of position adjustment units 10 that are fixedly arranged as in the related art, the path on which each component is transferred is Since it branches to a plurality of position adjustment units 10, it takes a long time to identify where the cause is when an assembly trouble occurs.

  Further, the position adjustment area AA of the lens drive module assembling apparatus 1 has a plurality of position adjustment areas (first position adjustment area AA1, second position adjustment area AA2, and third position adjustment area AA3). The position adjustment unit 10 can pass through the first position adjustment area AA1, the second position adjustment area AA2, and the third position adjustment area AA3 in order, and adjust the relative position little by little (divided). Thereby, since each position adjustment time of 1st position adjustment area AA1, 2nd position adjustment area AA2, and 3rd position adjustment area AA3 can be shortened, the time for the transfer apparatus 60 to stop uselessly can be reduced. For example, the position adjustment times of the first position adjustment area AA1, the second position adjustment area AA2, and the third position adjustment area AA3 are made closer to the parts carry-in time of the parts supply area IN or the parts carry-out time of the article carry-out area OUT. As a result, assembly efficiency is greatly improved.

  Further, in this lens drive module assembling apparatus 1, focus adjustment (approach / separation direction), XY adjustment (slide direction), and tilt adjustment (tilt direction) are simultaneously performed by three position adjustment areas AA1, AA2, and AA3. Since it can be performed in parallel and separately, the position control of each position adjustment area AA1, AA2, AA3 can be simplified. In particular, by completing the tilt adjustment that may affect the focus adjustment and the XY adjustment in the first first position adjustment area AA1, the subsequent focus adjustment (the approach / separation direction) and the XY adjustment (the slide direction). ) Is further simplified. For example, if the tilt adjustment is performed last (for example, the third position adjustment area AA3), it becomes necessary to perform the XY adjustment and the focus adjustment again by the tilt adjustment, so that the adjustment time tends to be long.

  In the first position adjustment area AA1 and the third position adjustment area AA3, the reference image pickup device MC is vertically movable (movable toward and away from the lens unit LL) below, and above the optical axis adjustment. A device (chart device) W is arranged. As a result, it is possible to detect the position / posture of the lens unit LL with high accuracy by capturing the chart image with the reference imaging element MC via the lens unit LL.

  Furthermore, since the lens drive module assembling apparatus 1 has the fixed region UV (the first curing region UV1 and the first curing region UV2) on the downstream side of the position adjustment region AA, the lens drive module assembling apparatus 1 is driven with the lens unit LL that has completed the position adjustment. The parts KK can be fixed to each other. At this time, on the position adjustment unit 10 that stops in the first curing region UV1 and the first curing region UV2, the time during which the adhesive is cured by the ultraviolet irradiation device and the relative position in the position adjustment region AA are adjusted. Since the time can be advanced simultaneously, useless time is eliminated and the assembly efficiency can be improved. In particular, when the irradiation time of ultraviolet rays is long, dividing the first curing region UV1 and the first curing region UV2 as in the present embodiment can halve the irradiation time of each region, so that the assembly efficiency is improved. It can be further enhanced.

  In the lens drive module assembling apparatus 1, the transfer device 60 has a rotary table structure, and the position adjustment units 10 that are modularized based on the base 5 are installed at equal intervals in the circumferential direction of the rotary table. ing. Therefore, in the manufacturing stage of the lens drive module assembling apparatus 1, it is possible to perform an accuracy inspection and an operation test in advance in units of the position adjustment unit 10. In addition, when setting up the lens driving module assembling apparatus 1 at a site such as an assembly factory, if the base 5 of the position adjusting unit 10 is fixed on the rotary table (adjusted), the installation work can be performed in a short time. Can be completed. Maintenance is also facilitated when the lens drive module assembling apparatus 1 fails.

  In the lens drive module assembling apparatus 1, since the adhesive escape portions 25A are formed on the arms 22 and 24 of the first holding portion 20 that holds the lens portion LL, the lens portion LL and the drive portion KK are fixed. The ultraviolet curable resin (adhesive) UJ can be irradiated with ultraviolet rays through the adhesive relief portion 25A. As a result, the positioning of the lens unit LL by the position adjusting mechanism 40 and the subsequent ultraviolet irradiation can be continued, so that the assembly accuracy can be increased.

  In the lens drive module assembling apparatus 1, the second holding unit 30 includes a pressing unit 36 that regulates the position of the driven unit MT <b> 2 in the optical axis direction in the driving unit KK. Therefore, when the lens unit LL and the driven unit MT2 are fixed to each other, the relative positions of both can be adjusted with high accuracy. At this time, the pressing protrusion escape portions 25B are formed on the arms 22 and 24 of the first holding portion 20, and interference between the pressing protrusion 37B of the pressing portion 36 and the arms 22 and 24 is avoided. As a result, the relative position of the driven portion MT2 and the lens portion LL can be adjusted while positioning the driven portion MT2. Furthermore, since the output terminal 35 is provided in the second holding unit 30 and power can be supplied to the driving unit KK, the reference position adjustment of the driven unit MT2 by the pressing unit 36 can be made more accurate.

  Further, the lens driving module assembling apparatus 1 has a coating apparatus 70 on the upstream side of the positioning apparatus 3. Accordingly, the lens unit LL and the drive unit KK are temporarily assembled, and the ultraviolet curable resin UJ is applied between them, and then the lens unit LL and the drive unit KK can be brought together into the positioning device 3. Since the application process, the position adjustment process, and the fixing (adhesive curing) process can be continued, it is possible to reduce the time that the component is left unfixed after the ultraviolet curable resin UJ (adhesive) is applied.

  Further, in the coating apparatus 70, the provisional assembly region AS and the coating region DS are arranged in the movement path of the component carrier 72, so that the lens unit LL and the driving unit KK are temporarily assembled, and an ultraviolet curable resin (adhesive) is used. ) UJ coating process can proceed simultaneously and coating efficiency can be increased. Further, the application region DS is divided into a first application region DS1 to a fourth application region DS4, and four application processes can be performed simultaneously. In addition, when there are three application positions, the application area DS may be divided into three, and if the dispenser DP and the component can be moved relative to each other, a plurality of application areas DS can be used in one application area DS. An ultraviolet curable resin (adhesive) UJ may be applied to the location.

  In the lens drive module assembling apparatus 1 of the above embodiment, the case where the positioning device 3 and the coating device 70 are configured by separate rotary tables is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 18, in the single transfer device 60, the provisional assembly area AS, the application area DS, the position adjustment area AA, the fixed area UV, and the like are gathered together by increasing the number of the position adjustment units 10. It can also be arranged. In the coating region DS in this case, the state shown in FIG. 9C, that is, the first holding unit 20 while holding the driving unit KK by the driving source side holding unit (driving unit holding unit in the present invention) 31. Is preferably opened, and after the adhesive UJ is applied by the dispenser DP, the lens unit LL is held by the first holding unit 20 to perform relative positioning with the driving unit KK.

  On the other hand, the lens driving module assembling apparatus is not limited to the case where the coating apparatus 70 is integrated, but the coating apparatus 70 shown in FIG. 3 and the like is arranged in another place (not shown), and the lens driving module assembly shown in FIG. Like the apparatus 1, the lens unit LL and the drive unit KK that have been provisionally assembled and applied with the adhesive may be supplied by the tray TT, and the position adjustment apparatus 3 may perform position adjustment or the like to collect the lens unit LL.

  In the above embodiment, when the optical axes of the components are adjusted, the direction of the optical axis is the vertical direction. However, the present invention is not limited to this, and the optical axis direction is close to the original use state of the camera. It may be a horizontal direction or an oblique direction intersecting the vertical direction.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1,100 Lens drive module assembly apparatus 3 Positioning apparatus 5 Base 10 Position adjustment unit 20 First holding part 20C Signal input / output part 22 First arm 24 Second arm 26 Arm moving part 30 Second holding part 31 Drive source side holding Part 32 first arm 34 second arm 35 output terminal 36 pressing part 37 pressing body 37B pressing projection 38 advance / retreat mechanism 39 vertical movement mechanism 40 position adjustment mechanism 40XS shift mechanism 40YS shift mechanism 40YT tilt mechanism 40ZT shift mechanism 40ZT tilt mechanism 51U Output terminal 60 Transfer device 61 Chart unit 65 Component supply device 70 Application device 72 Component carrier 73 Base 73A Lens portion storage portion 73B Drive portion storage portion 74 Lens portion holding portion 76 Drive portion holding portion 79A Component supply device 79B Article carry-out device 80 Transfer device 90 controller AA position adjustment area AA1 each position adjustment area AA1 first position adjustment area AA2 second position adjustment area AA3 third position adjustment area BC vacuum chuck DP dispenser DS application area DS1 first application area DS2 second application area DS3 third Coating area DS4 Fourth coating area KK Drive unit LL Lens unit LM Lens drive module LX Lens element MC Reference imaging element MM Holding groove MS Circumferential groove MT Lens drive motor MT1 Drive source MT2 Driven part NPU Lens measurement area OT Collection tray QT Body TT Engagement projection U Ultraviolet irradiation device UJ UV curable resin UV Fixed region UV1 First cured region UV2 First cured region UV2 Second cured region

Claims (8)

When assembling a lens driving module by combining a lens unit and a driving unit that moves the lens unit, an application device that applies an adhesive between the lens unit and the driving unit,
A driving unit holding unit that holds the driving unit combined with the lens unit;
An output terminal for contacting the input terminal of the drive unit and supplying power to the drive unit;
A power controller for controlling the power supplied from the output terminal;
A dispenser for applying the adhesive to a predetermined position;
The coating apparatus, wherein the dispenser applies an adhesive between the lens unit and the driving unit in a state where electric power is supplied to the driving unit by the output terminal. The dispenser applies an adhesive between the lens unit and the drive unit in a state where the position of the lens unit in the optical axis direction is stopped at the application-dedicated position by the drive unit.
The coating apparatus according to claim 1. A position detection device that detects a stop position of the lens unit in a state in which the position of the lens unit in the optical axis direction is stopped at the application-dedicated position by the drive unit,
The coating device according to claim 1 or 2. A determination device for determining whether the operation of the drive unit is normal;
Power is supplied to the drive unit via the output terminal to operate the drive unit, and the dispenser applies an adhesive to the drive unit that is determined to be normal by the determination device. Characterized by the
The coating apparatus according to any one of claims 1 to 3. Before applying the adhesive by the dispenser, the apparatus includes an appearance inspection device that inspects the appearance of the lens unit or the drive unit, and the dispenser is an adhesive when the appearance inspection device determines that the appearance is normal. It is characterized by applying
The coating device according to any one of claims 1 to 4. A lens driving module assembling apparatus that assembles a lens driving module by combining a lens unit and a driving unit that moves the lens unit,
A coating apparatus according to any one of claims 1 to 5;
A position adjustment unit that performs relative positioning of the lens unit to which the adhesive is applied and the drive unit;
The position adjustment unit includes:
A first holding part for holding the lens part;
A second holding part for holding the driving part;
A position adjusting mechanism for adjusting a relative position of the first holding part and the second holding part,
Lens drive module assembly device. The second holding part of the position adjusting unit also serves as the driving part holding part of the coating device,
The lens driving module assembling apparatus according to claim 6. When assembling a lens driving module by combining a lens unit and a driving unit that moves the lens unit, an application method for applying an adhesive between the lens unit and the driving unit,
Power is supplied to the drive unit by bringing the output terminal into contact with the input terminal of the drive unit,
The power supplied from the output terminal is controlled by a power controller,
An application method, wherein an adhesive is applied between the lens unit and the drive unit by a dispenser in a state where electric power is supplied to the drive unit by the output terminal.

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