JP2003311193A - Method and apparatus for coating inside surface of lens frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for coating the inside surface of a lens frame which can coat the inside surface of the lens frame simply and surely without the adhesion of coating to a surface with a lens barrel even when the lens frame is small in size and an apparatus for the method. <P>SOLUTION: The apparatus for coating the inside surface of the lens frame comprises the first masking jig 10 adhering to a surface with a barrel 101, the second masking jig 20 which is located at a position facing the first masking jig 10 and closely adhered to a surface with a barrel 102, a nozzle 11 which is fitted to the first masking jig 10 and ejects the coating, and an energizing part 50 for biasing the first masking jig 10 toward the second masking jig 20. An induction surface 21 for inducing the coating is formed in the second masking jig 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens frame inner peripheral surface coating apparatus and a lens frame inner peripheral surface coating method used when coating for the purpose of preventing inner surface reflection of a lens frame holding a plurality of lenses. Is.

[0002]

2. Description of the Related Art In a lens frame that holds a lens of an optical device such as a camera, a lens frame that holds a plurality of lenses is formed by an inner peripheral surface of the lens frame formed around an air gap portion between the lenses. The reflected light causes ghost and flare. Therefore, reducing the reflected light on the inner peripheral surface is an important issue. As a means for reducing the reflected light, antireflection coating is known as an effective means. Conventionally, in a relatively large-sized lens frame, antireflection coating has been performed on the inner peripheral surface other than the body-attached surface manually by a skilled worker.

On the other hand, there is a strong demand for miniaturization of recent optical equipment, and the optical system itself tends to be miniaturized. When the optical system is downsized, the distance between the inner surface of the lens frame and the position (optical path) through which the light flux passes is often narrowed, and it is often necessary to take measures against ghost and flare by reflected light.

[0004]

However, the above-mentioned conventional manual antireflection coating has a problem that the working cost becomes high. Also, with a downsized lens frame, it is difficult to paint by hand, so there is a possibility that paint may adhere to the body-attached surface of the lens frame, in which case the lens may tilt. There was a possibility that the optical characteristics could not be satisfied.

An object of the present invention is to make it possible to easily and reliably coat the inner peripheral surface of a lens frame without causing paint to adhere to the surface with the lens barrel even with a small lens frame. A surface coating device and a lens frame inner peripheral surface coating method are provided.

[0006]

The present invention solves the above-mentioned problems by the following means for solving the problems. It should be noted that, for ease of understanding, reference numerals corresponding to the embodiments of the present invention will be given and described, but the present invention is not limited thereto. That is, according to the invention of claim 1, an inner peripheral surface (1) other than the lens supporting portion of the lens frame (100) having a lens supporting portion (110) for supporting the lens in contact with the peripheral portion of the lens is provided.
05) is a lens frame inner peripheral surface coating apparatus, which is provided on the masking jig and a masking jig (10) that is in close contact with at least a boundary portion between the lens supporting portion (110) and the inner peripheral surface. And a nozzle (11) for injecting paint near the position corresponding to the optical axis of the lens in the lens frame.

According to a second aspect of the invention, in the lens frame inner peripheral surface coating apparatus according to the first aspect, the nozzle (11) is
A coating device for an inner peripheral surface of a lens frame, wherein the coating material is sprayed in a direction substantially along the optical axis.

The invention of claim 3 relates to claim 1 or claim 2.
In the lens frame inner peripheral surface coating device described in (1), the lens frame (100) is on the side opposite to the lens support portion (110) and is in contact with a peripheral portion of a second lens different from the lens, A second lens support portion (120) for supporting a second lens is provided, and at a position facing the masking jig, at least the second lens support portion and the inner peripheral surface (105). And a second masking jig (20) in close contact with a boundary portion between the inner peripheral surface and the inner peripheral surface of the lens frame.

According to a fourth aspect of the present invention, in the lens frame inner peripheral surface coating device according to the third aspect, the paint sprayed from the nozzle is provided in the lens frame at a position facing the nozzle (11). The lens frame inner peripheral surface coating device is characterized in that a guide portion (21) for guiding in the circumferential direction is provided.

According to a fifth aspect of the present invention, in the lens frame inner peripheral surface coating apparatus according to the fourth aspect, the guide portion (21) is
The lens frame inner peripheral surface coating device is characterized in that it has a substantially spherical shape that is recessed with respect to the surface facing the nozzle (11).

The invention of claim 6 is from claim 1 to claim 5.
In the lens frame inner peripheral surface coating apparatus according to any one of items 1 to 7, the surfaces of the masking jig (10) and the second masking jig (20) that contact the lens frame (100) are The lens surface inner surface coating device is characterized in that it has substantially the same lens surface shape as the lens and the second lens.

The invention of claim 7 is from claim 1 to claim 6.
In the lens frame inner peripheral surface coating apparatus according to any one of items 1 to 7, at least one of the masking jig (10) and the second masking jig (20) has an air vent (12). It is a coating device for the inner peripheral surface of a lens frame.

The invention of claim 8 is from claim 1 to claim 7.
The lens frame inner peripheral surface coating apparatus as described in any one of 1 to 6 above, further comprising a biasing unit that biases at least one of the masking jig and the second masking jig toward the lens frame. Is an inner peripheral surface coating device for a lens frame.

The invention of claim 9 is from claim 1 to claim 8.
The lens frame inner peripheral surface coating apparatus according to any one of items 1 to 7, further comprising: a cleaning unit that removes a paint adhering to at least one of the masking jig (10) and the second masking jig (20). This is a lens frame inner peripheral surface coating device.

According to a tenth aspect of the present invention, a lens for coating an inner peripheral surface (105) of the lens frame (100) having a supporting portion (110, 120) for supporting the lens, the inner peripheral surface (105) being arranged continuously to the supporting portion. In the frame inner peripheral surface coating method, a masking jig (10, 20) is arranged so as to be in close contact with at least a boundary portion between the supporting portion and the frame inner peripheral surface, and the optical axis of the lens of the masking jig. Discharging paint from a nozzle (11) arranged in the vicinity of a position corresponding to the position,
Is a method for coating the inner peripheral surface of a lens frame.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in more detail below with reference to the drawings. (First Embodiment) FIG. 1 is a view showing an embodiment of a lens frame inner peripheral surface coating apparatus according to the present invention. The lens frame inner peripheral surface coating apparatus according to the present embodiment includes the first masking jig 1
0, a second masking jig 20, a paint pressing portion 30, a jig positioning portion 40, a biasing portion 50, a base portion 60, etc.,
This is a device for painting the inner peripheral surface of the lens frame 100.

The lens frame 100 is a plastic molded component that holds a first lens and a second lens (not shown). FIG. 2 is a sectional view of the lens frame 100. The lens frame 100 includes a first lens support portion 110 having a body-attached surface 101 that contacts the peripheral edge portion of the lens surface of the first lens and a fitting surface 103 that contacts the outer peripheral portion of the first lens,
Body surface 1 in contact with the peripheral edge of the lens surface of the second lens
02 and the fitting surface 10 that contacts the outer peripheral portion of the first lens
And a second lens support portion 120 having a number of four.
Further, between the first lens support portion 110 and the second lens support portion 120, a cylindrical surface 105 which is an air gap portion between the first lens and the second lens is provided.

Returning to FIG. 1, the first masking jig 10
Is in close contact with the body-attached surface 101, and the first lens support portion 11
No. 0 is a masking jig that prevents the paint from adhering to No. 0, and holds the lens frame 100 by sandwiching it with a second masking jig 20 described later during coating. The surface of the first masking jig 10 that faces the second masking jig 20 has the same surface shape as the lens surface shape of the first lens.
01 can be closely contacted. First masking jig 1
At 0, a nozzle 11 and an air vent 12 are provided. The nozzle 11 is a portion which is on the center line O corresponding to the optical axes of the first and second lenses and which sprays the paint when performing the coating. , Is ejected in the direction along the center line O. The air vent 12 is a hole that connects the space C formed by the first masking jig 10, the second masking jig 20, and the lens frame 100 to the outside, and when the paint is sprayed, this space C This is an air vent that prevents the internal pressure from increasing and hindering the spray of paint.

The second masking jig 20 has a body-attached surface 1
02 is a member that prevents the paint from adhering to the second lens support portion 120 and holds the lens frame 100 by sandwiching it with the first masking jig 10 as described above. . The second masking jig 20 is the first
The surface facing the masking jig 10 is
The contact surface 22 is in close contact with the flat surface 23, and the guide surface 21 described later. The contact surface 22 has the same surface shape as the lens surface shape of the second lens, and can be in close contact with the body-attached surface 102 of the lens frame 100. The second masking jig 20 has a nozzle 1
A guide surface (guide portion) 21 is formed at a position opposed to 1. The guide surface 21 is provided to guide the paint sprayed from the nozzle 11 toward the cylindrical surface 105.
First masking jig 10 of second masking jig 20
It has a substantially spherical shape that is recessed with respect to the surface facing.

The surfaces of the first masking jig 10 and the second masking jig 20 facing each other have shapes corresponding to the lens surface shapes of the first lens and the second lens. The first lens support portion 110 and the second lens support portion 120 are in close contact with each other without a gap.

The jig positioning portion 40 supports the first masking jig 10, is fitted with the guide shaft 41, is slidable in the direction along the central axis O, and holds the position at an arbitrary position. It is a portion having position fixing means (not shown) that can be fixed as much as possible.

The urging portion 50 is a compression coil spring arranged around the guide shaft 41, and the first masking jig 10 is moved in the direction of the second masking jig 20 via the jig positioning portion 40. It is a biasing means for biasing in the direction of arrow A).
The urging force of the urging portion 50 needs to be weak to the extent that the lens frame 100 is not deformed.
Since it is necessary to secure the force necessary for surely masking the 0-body-attached surfaces 101 and 102, it is desirable to provide the urging portion 50 with an adjusting portion that can adjust the urging force.

The base portion 60 is the second masking jig 2
0, which is a base member for holding the guide shaft 41, and has a fitting hole 61 formed therein. The fitting hole 61 is for the lens frame 1.
00 is a hole fitted with the outer peripheral shape of 00, and the position of the central axis O is determined by the fitting hole 61 when the lens frame 100 is attached.

Here, the lens frame 10 in the present embodiment.
A method for coating the cylindrical surface 105 of No. 0 will be described. First, the paint adhering to the facing surfaces of the first masking jig 10 and the second masking jig 20 is removed (cleaning step). This cleaning process may be performed manually as needed, or may be automatically performed in combination with the jig positioning unit 40 by electric power or the like. First masking jig 1 in the present embodiment
The facing surfaces of the 0 and the second masking jigs 20 have simple shapes, and the nozzle portion does not project, so that the cleaning process is simple and unnecessary paint can be reliably removed. . Next, after the cleaning step, the lens frame 100 to be painted is set between the first masking jig 10 and the second masking jig 20 (lens frame setting step). At this time, the first masking jig 10 is moved in the direction of arrow B against the urging force of the urging portion 50 and then fixed by the jig positioning portion 40, and the lens frame 100 is fitted into the fitting hole 61. Fit in.

After the lens frame 100 is set, the jig positioning portion 40 releases the fixation, and the urging portion 50 causes the first position.
Urging the masking jig 10 of No. 1 in the direction of arrow A,
The second masking jigs 10 and 20 are brought into close contact with the lens frame 100 (contact process). Finally, the paint is sprayed from the nozzle 11 for coating (painting process). At this time, the nozzle 11
The paint sprayed from hits the guide surface 21, diffuses in the circumferential direction, and is evenly applied to the cylindrical surface 105.

According to the present embodiment, since the barrel-attached surfaces 101 and 102 can be reliably masked by the first and second masking jigs 10 and 20, even if the lens barrel is small, the lens barrel It is possible to easily and reliably coat the inner peripheral surface of the lens frame without the paint adhering to the attached surface.

(Modifications) The present invention is not limited to the above-described embodiments, but various modifications and changes can be made, which are also within the scope of the present invention. For example, in the present embodiment, the first and second masking jigs 10, 20
Shows an example in which masking is performed by a surface that is in close contact with the body-attached surfaces 101 and 102, but the present invention is not limited to this. Good.

Further, in the present embodiment, the lens frame 10
0 is an example of a plastic resin molded product,
Not limited to this, for example, a metal lens frame may be used.

Further, in this embodiment, the nozzle 1
Although 1 and the air vent 12 are provided on the first masking jig 10 by way of example, the present invention is not limited to this. For example, these are provided on the second masking jig side and correspond to the guide surface 21. The portion may be provided on the first masking jig side.

[0030]

As described in detail above, according to the present invention, the body-attached surface can be reliably masked by the masking jig, so that even a small lens frame can be used.
The inner peripheral surface of the lens frame can be coated easily and reliably without the paint adhering to the surface with the lens barrel. Also,
Since the guide portion is provided, uniform coating can be performed even with a simple nozzle. Furthermore, since the surface of the masking jig has a simple shape, maintenance can be easily performed.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a lens frame inner peripheral surface coating apparatus according to the present invention.

FIG. 2 is a sectional view of a lens frame 100.

[Explanation of symbols]

10 First masking jig 11 nozzles 12 Air vent 20 Second masking jig 21 guide surface 30 Paint pressurizing section 40 Jig positioning section 41 Guide shaft 50 Energizer 60 base 61 Mating hole 100 lens frame 101,102 Body surface 103, 104 Mating surface 105 Cylindrical surface 110 First lens support 120 Second lens support

Claims (10)

[Claims] 1. A lens frame inner peripheral surface coating device for coating an inner peripheral surface of a lens frame having a lens supporting portion for supporting the lens, the inner peripheral surface being in contact with a peripheral portion of the lens, the lens frame inner peripheral surface coating device comprising: A masking jig that comes into close contact with a boundary portion between the lens support portion and the inner peripheral surface, and a nozzle that is provided on the masking jig and that sprays paint near a position corresponding to the optical axis of the lens in the lens frame. And a lens frame inner peripheral surface coating device comprising. 2. The lens frame inner peripheral surface coating device according to claim 1, wherein the nozzle sprays paint in a direction substantially along the optical axis. 3. The lens frame inner peripheral surface coating device according to claim 1, wherein the lens frame is on the opposite side of the lens support portion,
It has a second lens support portion that contacts the peripheral portion of a second lens different from the lens and supports the second lens, and is located at a position facing the masking jig, and has at least the second lens support portion. 2. A lens frame inner peripheral surface coating apparatus, comprising: a second masking jig that is in close contact with a boundary portion between the second lens supporting portion and the inner peripheral surface. 4. The lens frame inner peripheral surface coating apparatus according to claim 3, wherein a guide portion that guides the paint sprayed from the nozzle in the lens frame inner peripheral direction is provided at a position facing the nozzle. An inner peripheral surface coating device for a lens frame, which is characterized in that it is provided. 5. The lens frame inner peripheral surface coating device according to claim 4, wherein the guide portion has a substantially spherical shape that is recessed with respect to a surface facing the nozzle. Frame inner peripheral coating device. 6. Any one of claims 1 to 5
Item 9. In the lens frame inner peripheral surface coating device as described in the item 1, the surfaces of the masking jig and the second masking jig that contact the lens frame are substantially the same as the lens surface shapes of the lens and the second lens. The inner peripheral surface coating device for the lens frame. 7. Any one of claims 1 to 6
Item 9. The lens frame inner peripheral surface coating device according to item 4, wherein at least one of the masking jig and the second masking jig has an air vent portion. . 8. Any one of claims 1 to 7
Item 9. The lens frame inner peripheral surface coating device as described in the item 1, further comprising: a biasing unit that biases at least one of the masking jig and the second masking jig toward the lens frame. Lens frame inner surface coating device. 9. Any one of claims 1 to 8
Item 9. The lens frame inner peripheral surface coating apparatus according to item 4, further comprising: cleaning means for removing paint adhered to at least one of the masking jig and the second masking jig. Coating equipment. 10. A lens frame inner peripheral surface coating method for coating an inner peripheral surface of a frame, which is arranged continuously to the support portion of a lens frame having a support portion for supporting a lens, comprising: at least the support portion and the inside of the frame. A masking jig is arranged so as to be in close contact with the boundary with the peripheral surface, and the coating material is discharged from a nozzle arranged in the vicinity of the position of the masking jig corresponding to the optical axis position of the lens. Characteristic lens frame inner surface coating method.