KR100771305B1 - Photo curable device for camera lens - Google Patents

Abstract

A photo-curing device for a camera lens is provided to increase inside space utility for a clean room with a huge spatial limit, by simplifying a structure thereof and to prevent a thin film of the lens from being damaged due to heat generated from an UV(UltraViolet) lamp. A photo-curing device for a camera lens(1) comprises a table bed(10), a tray(20), an actuator(30), a photo spot injection unit(40), and a controller. The table bed includes a transfer rail groove at an upper surface longitudinally. The tray is positioned and moved at the transfer rail groove of the table bed, and has a camera lens(c) mounted on the upper surface for a cured object. The actuator is mounted on one side of the table bed, and has a moving end moving the tray to a curing position by receiving a control signal from the controller. The light spot lamp includes a light output unit installed at the table bed to cover an upper part of the tray moved to the curing position, corresponded to the camera lens to emit light. The controller consists of a sensor(51) installed at one side of the transfer rail groove to detect an initial position of the moving end for the actuator and a presence of the tray, and a microcomputer receiving a sensing signal from the sensor and delivering the control signal to the light spot lamp and the actuator.

Description

Photo curable device for camera lens

1 is a schematic view showing a light curing apparatus for a camera lens according to the present invention;

Figure 2 is a side cross-sectional view for explaining the internal configuration of the optical curing device for a camera lens according to the present invention,

3 is a side cross-sectional view for explaining an operating state of FIG. 2;

Figure 4 is a schematic view illustrating a control device in the optical curing device for a camera lens according to the present invention.

Figure 5 is a schematic diagram for explaining the configuration of the controller in the optical curing device for a camera lens according to the present invention,

6 is a flowchart showing a curing process by the optical curing device for a camera lens of the present invention.

<Explanation of symbols for main parts of the drawings>

1: optical curing device for camera lens 10: table bed

11: transfer rail groove 20: tray

21: receiving groove 30: actuator

31: cylinder 32: rod

35 lever 40 light spot irradiator

41: duct 41a: mounting hole

43: optical fiber 45: light generator

45a: housing 45b: UV lamp

45c: reflector 50: controller

51: first detector 53: second detector

55: microcomputer c: lens for the camera

The present invention relates to a photo-curing device for a camera lens mounted on a mobile device, and more particularly, to improve the yield of the product by improving the curability by intensively irradiating light independently to a plurality of lenses arranged on the tray It relates to a light curing apparatus for a camera lens that can be.

In recent years, technologies of various mobile devices, which are easy to carry and have enhanced functions for transmitting and receiving voice information and data, are rapidly being developed and distributed. In particular, as the spread of next-generation mobile communication terminals such as PDAs and IMT2000 terminals increases, these small pieces of information The demand for a small camera module for utilizing a communication terminal for video communication and imaging operations is greatly increasing.

The camera module is largely composed of an image sensor module and a lens housing. The image sensor module includes an image pickup device, a circuit board electrically connected to the image pickup device, and a flexible printed circuit board (FPCB) for transmitting a captured signal to an external circuit. And the lens housing includes one or more lenses and filters for hermetically receiving the image sensor module.

Here, the image pickup device is a device for converting an optical image signal from the outside into an electrical signal, and can be largely divided into an image tube and a solid state image sensor, and electronically, a Vicon and a Plumbicon are used. The latter include a Complementary Metal-Oxide Semiconductor (CMOS) sensor and a Charge Coupled Device (CCD) sensor. That is, the CCD image sensor is used to move the electrons generated by light to the output unit as it is, and the CMOS image sensor converts the electrons generated by light into voltage in each pixel and then outputs them through various CMOS switches.

CCD image sensor has low noise signal output and maintains uniformity between pixels, so it is possible to realize higher image quality than CMOS image sensor, whereas CMOS image sensor has simpler peripheral circuit and lower power consumption and economical efficiency than CCD image sensor. Due to this high advantage, it is applied to mobile devices (mobile communication terminals, PDAs, PC cameras, etc.) requiring portability.

On the other hand, in the camera module configured as described above, the lens is fixed by the curing of the adhesive injected in the state accommodated in the lens housing, and at this time through the drying furnace in which the heater is installed as a method for quickly curing the adhesive, There is a problem of damaging the circuit board and the lens by the high temperature heat.

In order to solve this problem, Korean Patent Application No. 2003-0099059 has developed a UV curing apparatus for applying a UV adhesive which is a kind of photocuring adhesive to the lens and the lens housing and irradiated with a UV light source to cure.

Looking at the configuration of the UV curing apparatus according to the prior art, first has a tray that can put a plurality of camera modules coated with UV adhesive, the conveyor for transporting the tray, and a plurality of cameras provided on the path of the conveyor And an irradiator with a UV lamp for irradiating light to the module.

UV curing device having such a configuration, after assembling each component constituting the camera module and applying the UV adhesive to the last part and put it on the conveyor through the tray, the conveyor moves and passes through the irradiator with UV lamp At the UV adhesive cures.

However, the conventional UV curing apparatus irradiates a plurality of lenses widely disposed on a tray by using a single large UV lamp, and as a result, the irradiation distance of the UV lamp to the lens is not constant and a difference occurs. The degree of hardening occurs, and the degree of hardening also occurs depending on the position of the tray on the conveyor, which prevents the uniform level of hardening work and exposes the external parts of the lens to UV. There was a disadvantage.

In addition, waiting time is required to simultaneously cure a plurality of lenses on the conveyor. During this waiting time, since the camera lens to be cured is exposed to the outside, contaminants such as dust adhere to the surface of the UV adhesive and are cured together. There was a problem that occurred.

In addition, since most of the UV curing apparatus taking the form of a conveyor requires a wide installation and a working space with a width of 1 meter, a length of 0.4 meters, and a height of 1.2 meters, there is a problem in that the degree of freedom of space is impaired in other process configurations.

The UV lamp becomes high temperature when it generates light. In the conveyor method, the camera module is hardened inside the curing device for 15 to 20 seconds. At this time, the high temperature generated by the UV lamp causes coating to improve the protection and performance of the lens. The damaged thin film not only causes the deterioration of the product, but also has a problem of greatly reducing the production yield.

The present invention was created in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a rapid and stable curing performance by precisely irradiating light individually to a plurality of lenses arranged on a tray. An optical curing apparatus for a lens is provided.

In addition, the present invention prevents damage to the lens thin film due to the high temperature heat generated by the UV lamp while reducing the defect rate due to the contaminants due to the shortening of the curing time, and through the simple configuration to reduce the space occupancy degree of freedom of space There are other purposes.

The optical curing device for a camera lens according to the present invention for achieving the above object is a table bed having a conveying rail groove formed in a longitudinal direction on an upper surface thereof, and is provided in a conveying rail groove of the table bed to be hardened on an upper surface thereof. An actuator having a tray having an array of lenses for a target camera, an actuator provided at one side of the table bed and receiving a signal from a controller to move the tray to a curing position, and an upper side of the tray moved to the curing position. It is characterized in that it comprises a light spot irradiator which is installed on the table bed to cover and provided corresponding to each camera lens arranged in the tray and having a light output unit for irradiating light.

As a preferred feature of the present invention, the controller is installed on one side of the transfer rail groove, the first sensor for detecting the initial position of the movable end of the actuator and the second sensor for detecting whether the tray is mounted, and the first, It is configured to include a microcomputer that receives the detection signal from the two detectors and transmits a control signal to the actuator and the light spot irradiator.

Another desirable feature of the present invention is that the tray is provided with receiving grooves at equal intervals so that the camera module can be arranged in a grid arrangement.

In another preferred aspect of the present invention, the actuator is a pneumatic cylinder using a pneumatic operation source, the movable end is integrally connected to the rod and the tip of the rod in and out of the pneumatic cylinder based on the traveling direction of the tray It consists of a lever which contacts the rear end side.

In another preferred aspect of the present invention, the light spot irradiator is provided in a tunnel form at a position to be cured of the tray, and a duct in which a plurality of installation holes corresponding to the lattice arrangement of the tray are formed on an upper side thereof, and Inserted and fixed in each installation hole is provided so that the light output unit is irradiated to the light output provided at one end facing the upper surface of the tray and the other end is configured to include an optical fiber connected to the light generator for generating light.

In another preferred aspect of the present invention, the optical generator forms an outer body, and a housing to which the other end of the optical fiber is connected to one side thereof, and the other side of the optical fiber, which is housed in the housing and is supplied with power by a control signal of a controller. UV lamp for irradiating light toward the end, and the reflector is provided on one side of the UV lamp to collect the irradiation direction of light.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Hereinafter, a light curing apparatus for a camera lens according to the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram schematically showing a light curing apparatus for a camera lens according to the present invention, which shows a state in which a tray having a camera lens arranged in a lattice form is provided at an initial position of a table bed, and FIGS. 2 and FIG. 3 is a side cross-sectional view for explaining the internal configuration of the optical curing device for a camera lens according to the present invention, Figure 2 shows the state before the tray is transferred, Figure 3 is the tray is transferred to the curing target position by the actuator It shows the state.

And, Figure 4 is a block diagram for explaining a control device in the camera lens light curing apparatus according to the present invention, Figure 5 is a schematic diagram for explaining the configuration of the controller in the camera lens light curing device according to the present invention.

As shown therein, the optical lens curing apparatus 1 for the camera lens of the present invention includes a table bed 10 that provides a space in which various components are installed, and a plurality of the lens for cameras c for the curing target are grating. Light is irradiated to the tray 20 arranged in the form, the actuator 30 for generating the driving force for moving the tray 20 to the curing target position, and the plurality of camera lenses c arranged in the form of a lattice. It consists of a light spot irradiator 40 and a controller 50 for transmitting a control signal to the actuator 30 and the light spot irradiator 40.

Table bed 10 is a rectangular member having a flat surface at least in the upper side, the upper side is formed with a conveying rail groove 11 having a predetermined width and depth in the longitudinal direction, the conveying rail groove 11 The tray 20 to be described later is provided, and the actuator 30 is provided on one side thereof.

The tray 20 is a member that selectively moves along the transfer rail groove 11 of the table bed 10 described above, and an accommodation groove 21 for mounting the camera lens c at regular intervals on an upper surface thereof. ) Is formed. At this time, the receiving groove 21 is formed at equal intervals, as shown in the figure is arranged in a grid form to provide a camera lens (c) in a grid arrangement.

The tray 20 configured as described above is positioned to move along the transfer rail groove 11 of the table bed 10 in the state that the lens for camera for curing c is inserted into each of the receiving grooves 21. At this time, the tray 20 is selectively moved to the curing target position in conjunction with the operation of the actuator 30 to be described later.

The actuator 30 is installed on one side of the table bed 10 as described above and receives a control signal from the controller 50 to move the tray 20 to a curing position. It is proposed that a pneumatic cylinder 31 having a movable end for transmitting the same is used.

That is, the actuator 30 may be used a conventional pneumatic cylinder 31 to shed the rod 33 by using the pneumatic pressure as an operating source, the cylinder 31 is a table parallel to the transfer rail groove 11 The bed 10 is fixedly installed. In addition, the end portion of the rod 33 which is selectively settled is provided with a lever 35 which contacts the rear end side of the tray 20 and transmits a driving force based on the traveling direction of the tray 20.

Meanwhile, the actuator 30 in the present invention may be modified in various known driving sources and forms as long as the actuator 30 has a structural feature capable of moving the tray 20 by a predetermined distance.

The actuator 30 configured as described above has a state in which the lever 35 connected to the rod 33 is located at the rear end side of the tray 20 in the state in which the rod 33 protrudes, and the controller 50 in such a state. When the control signal is received from the rod 33 is retracted into the cylinder 31 as a result, the lever 35 moves the tray 20.

The light spot irradiator 40 is provided with respect to a plurality of camera lenses c for the curing target provided on the tray 20 when the tray 20 described above is moved to the curing position by the operation of the actuator 30. It is an apparatus which irradiates light and hardens | cures substantially.

The light spot irradiator 40 has a duct 41 fixedly installed on the table bed 10 so as to be provided in a tunnel form at a position to be cured of the tray 20, and one end is installed in the duct 41. To the optical lens 43 for irradiating light independently to each lens (c) for the camera to be cured arranged in the tray 20, and to the light generator 45 for generating light and transmitting it to the optical fiber 43 It is composed.

That is, the duct 41 is formed in a tunnel shape in which the front and rear sides are opened based on the traveling direction of the tray 20 and the side and upper sides are covered, and a plurality of installation holes 41a are formed on the upper side. Structure. At this time, the installation hole 41a is formed in a shape corresponding to the receiving groove 21 formed in the lattice arrangement in the tray 20 described above.

The optical output part, which is one end of the optical fiber 43, is inserted into and fixed to the installation hole 41a, and the optical output part is disposed to face each receiving groove 21 of the tray 20. The other end of the optical fiber 43 is connected to the light generator 45 for generating light to receive the light. On the other hand, since the optical fiber is carried out by a common known technique, detailed description and operation will be omitted.

The light generator 45 is largely composed of a housing 45a, a UV lamp 45b, and a reflector 45c. Here, the housing 45a is a member that provides a space in which components can be installed while forming an outer body, and the other end of the optical fiber 43 is connected to one side. In addition, a UV lamp 45b is provided inside the housing 45a to be irradiated with light by being supplied with power by a control signal of the controller 50. The UV lamp 45b at this time is the optical fiber 43 It is arranged to irradiate light toward the other end. A reflector 45c, which is a kind of reflecting plate, is provided at the rear side of the UV lamp 45b, that is, at the position opposite to the other end of the optical fiber 43, and the reflector 45c has a light irradiation direction on the other side of the optical fiber 43. Finally, the role is to gather.

The light spot irradiator 40 configured as described above generates a light from the light generator 45 by receiving a signal from the controller 50, and the generated light is irradiated through the light output unit of the optical fiber 43. At this time, the light output unit is disposed corresponding to each of the receiving grooves 21 of the tray 20, so that the lens for the camera for curing (c) provided in the receiving groove 21 is irradiated with the light of the UV lamp Will be.

The controller 50 transmits a control signal to the actuator 30 and the light spot irradiator 40 on the basis of the detection signal of the actuator 30 and the tray 20 described above, and largely includes the first and second detectors 1 and 2. 51 and 53 and the microcomputer 55.

The first detector 51 is installed at one side of the table bed 10 at which the transfer rail groove 11 starts to sense an initial position of the lever 35 of the actuator 30, and the actuator 30. This is to prevent the actuator 30 from being operated while the lever 35 is not in the initial position. The first sensor 51 may be a proximity sensor such as a micro switch, an ultrasonic sensor, an optical sensor, a magnetic sensor, a capacitive sensor, and the like, and thus the detailed description thereof will be omitted.

The second sensor 53 is installed on one side of the table bed 10 proximate to the duct 41 side with respect to the first sensor 51 described above to detect the presence of the tray 20, the tray This is to prevent the actuator 30 and the light spot irradiator 40 from being operated in the state where the 20 is not positioned on the transfer rail groove 11. Like the first sensor 51, the second sensor 53 also uses a proximity sensor.

The microcomputer 55 performs numerical calculation or logical operation using an electronic circuit. The microcomputer 55 receives a detection signal from the first and second detectors 51 and 53 described above and uses the actuator 30 and an optical spot based thereon. The control signal is transmitted to the irradiator 40. Such a microcomputer is preferably configured with a peripheral device such as a display and a keypad in order to change the operation time or the amount of light of the UV lamp 45b and to check the same.

On the other hand, the present invention enables to adjust the height of the duct 41 in order to be able to change the irradiation angle according to the type of the lens (c) for the camera to be cured, or the installation hole 41a of the duct 41 It may be configured to adjust the height of the light output unit of the optical fiber 43 coupled to).

Referring to Figure 5 the operation of the optical curing device for a camera lens configured as described above is as follows.

First, a plurality of camera lenses (c) in which the lenses are assembled are prepared, and UV adhesive is applied thereto.

Then, a camera lens (c) coated with a UV adhesive, that is, a camera lens (c) for a curing target, is inserted into each of the receiving grooves 21 having a lattice-like arrangement of the tray 20 and provided therewith. It is positioned in the initial position of the transfer rail groove 11 of the table bed (10).

In this case, as shown in FIG. 2, the actuator 30 should be positioned at the rear end side of the tray 20 in a state in which the rod 33 protrudes outward from the cylinder 31.

When the photocuring apparatus 1 is operated in such a state, the first and second detectors 51 and 53 detect the initial position of the lever 35 and the presence or absence of the tray 20 so as to detect the microcomputer 55. When the sensing information is normal, the microcomputer 55 applies a control signal to the actuator 30 and the light spot irradiator 40, and maintains the standby state when there is no sensing information.

In this case, when the sensing information is in a normal state, the actuator 30 receiving the control signal from the microcomputer 55 performs the operation of retracting the rod 33 into the cylinder 31. ) Moves the tray 20 to a position to be cured, that is, inside the duct 41.

At this time, the plurality of light generators 45 constituting the light spot irradiator 40 generates a light by receiving a control signal from the microcomputer of the controller 50, which is approximately based on the operating time of the actuator 30. It is preferable to turn off after 3 to 5 seconds with a delay time of 5 seconds.

On the other hand, the light generated by the light generator 45 is irradiated through the light output unit along each optical fiber 43, and as a result, curing for the camera lens (c) is performed. That is, a plurality of camera lenses c for a curing target arranged in a lattice form on the tray 20 are quickly and stably cured as each optical fiber 43 is precisely irradiated with light at an optimal irradiation angle. Will be carried out.

On the other hand, the present invention is not limited to the described embodiments, it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

The optical curing device for a camera lens according to the present invention constructed and operated as described above has a simple structure and can increase space utilization in a large clean room, and is arranged in a lattice form on a tray. Since the light output unit is arranged in correspondence with the lens for the lens, it provides an advantage that can guarantee a fast and stable curing performance.

In addition, since the respective light output unit irradiates light only to the corresponding camera lens, it is possible to improve the irradiation efficiency through the optimum irradiation angle and to prevent product defects due to uneven illumination. In addition, as the curing time is significantly shortened compared to the past, damage to the lens due to heat can be prevented in advance, and the external exposure time of the camera lens due to the shortening of the waiting time can be minimized to reduce product defects due to the attachment of contaminants. It becomes possible.

Therefore, it is possible to expect the cost reduction due to the improvement of the production yield and the reduction of defects, and to provide a very useful effect in the industry which can improve the reliability of the device.

Claims (6)

Table bed and the conveying rail groove is formed in the longitudinal direction on the upper surface; A tray provided in the transfer rail groove of the table bed and having a lens for a camera to be hardened on an upper side thereof; An actuator provided at one side of the table bed and having a movable end for receiving a control signal from a controller and moving the tray to a curing position; An optical spot irradiator installed on a table bed to cover the upper side of the tray moved to the curing position and provided with a lens for each camera arranged on the tray, the optical spot irradiating light; A controller installed at one side of the transfer rail groove and including a detector for individually detecting an initial position of an actuator moving end and whether the tray is mounted, and a microcomputer for receiving a detection signal from the detector and transmitting a control signal to an actuator and an optical spot irradiator. Wow; Light curing device for a camera lens, characterized in that comprises a. The optical curing apparatus of claim 1, wherein the detector comprises a first sensor for detecting an initial position of an actuator moving end, and a second sensor for detecting whether the tray is mounted. The optical curing apparatus of claim 1, wherein the tray comprises a receiving groove arranged in a lattice form at equal intervals so that the camera lens may be arranged in a lattice arrangement. 2. The actuator according to claim 1, wherein the actuator is a pneumatic cylinder using pneumatic pressure as its operating source, and the movable end is integrally connected to a rod coming out of the pneumatic cylinder and the tip of the rod, and the rear end side thereof based on the traveling direction of the tray. Light curing device for a camera lens, characterized in that the lever in contact with. The light spot irradiator of claim 1 or 3, A duct provided in a tunnel form at a position to be cured of the tray and having a plurality of installation holes formed on an upper surface thereof corresponding to the lattice arrangement of the tray; An optical fiber inserted into and fixed to each installation hole of the duct, the optical output unit irradiating the light provided at one end thereof to face the upper surface of the tray, and the other end connected to the light generator for generating light; Light curing device for a camera lens, characterized in that comprises a. The optical generator of claim 5, wherein the light generator forms an outer body, and a housing to which the other end of the optical fiber is connected to one side thereof; A UV lamp accommodated in the housing and supplied with power by a control signal of a controller to irradiate light toward the other end of the optical fiber; A reflector provided at one side of the UV lamp to collect a light irradiation direction; Light curing device for a camera lens, characterized in that comprises a.

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