JP4707470B2 - Lens waterproofing method - Google Patents

Description

The present invention relates to how to waterproof the lens.

  Conventionally, various contrivances have been made for waterproofing of lenses used in cameras and lamps. For example, in a light emitting diode display having a light emitting section in which a plurality of light emitting diodes are mounted on a substrate, a transparent lens, and a waterproof case that covers the whole, the light emitting diode in which the transparent lens and the waterproof case are integrally formed of the same resin. A display is disclosed (for example, refer to Patent Document 1).

In addition, a method of waterproofing the lens using an O-ring or packing is also widely adopted. For example, in a mounting structure of a light emitting display lens such as an LED, the packing is attached to a gap portion between the lens and the case. For example, a light emitting display lens mounting structure is disclosed in which a lens is formed by providing an annular groove, a packing is inserted into the annular groove, and the lens is press-fitted and attached from the outside of the case (for example, , See Patent Document 2).
Japanese Utility Model Publication No. 63-89267 (page 2-5, FIGS. 1 to 3) JP-A-6-267317 (page 1-3, FIGS. 1 and 2)

  However, in the integral molding method disclosed in Patent Document 1, in the case of a single lens such as a lens of a light emitting diode display, the waterproof case and the transparent lens are integrally molded with the same resin relatively easily. However, in the case of a lens constituted by a plurality of single lenses, there is a problem that the waterproof treatment of the contact portion between the single lenses cannot be performed.

  In addition, in the lens waterproof system using an O-ring or packing as disclosed in Patent Document 2, there is a problem that the lens and the case cannot be completely sealed due to tolerance of the O-ring or packing. In addition, there is a problem that the sealing state of the O-ring or the packing changes depending on use conditions such as temperature.

In view of the circumstances described above, an object of the present invention is to provide a lens waterproofing method for manufacturing a low-cost lens assembly excellent in waterproofness.

The lens waterproofing method of the present invention that solves the above problems is as follows.
A plurality of single lenses are arranged in a lens frame in which a plurality of single lenses are arranged, and a front surface and a rear surface, which are optical paths, are masked among lenses made up of a plurality of single lenses arranged in the lens frame. ,
The lens frame is immersed in a liquid and solidifying waterproof material together with a plurality of single lenses in the lens frame.

  According to the lens waterproofing method of the present invention, since the entire lens frame including the single lens can be covered with a waterproof material by a simple operation, the lens waterproofing process with excellent waterproofness can be performed at low cost.

As described above, according to the present invention, it is possible to realize the lenses waterproofing method low cost with excellent waterproofness.

With reference to the drawings illustrating an embodiment of the lens waterproofing how the present invention.

  FIG. 1 is a diagram showing the steps of the lens waterproofing method according to the present invention.

  As shown in FIG. 1, in this lens waterproofing method, single lenses 11 and 12 are arranged inside a lens frame 14.

  Next, of the lens 13 composed of the single lenses 11 and 12 arranged in the lens frame 14, the front surface 13 a and the rear surface 13 b that are optical paths are masked by the masking jigs 15 and 16.

  Next, the lens 13 with the front surface 13 a and the rear surface 13 b masked is immersed in a liquid tank 18 filled with a solid liquid rubber 17 together with the lens frame 14, and then pulled up from the tank 18.

  Next, after the liquid rubber 17 is solidified, the masking jigs 15 and 16 are removed from the lens 13, so that the region excluding the front surface 13 a and the rear surface 13 b serving as the optical paths of the lens frame 14 and the lens 13 is the rubber film 19. A covered lens assembly is obtained.

  In addition, the liquid rubber 17 in this embodiment corresponds to a liquid and solidifying waterproof material referred to in the lens waterproofing method of the present invention. The waterproof material is not limited to liquid rubber, and any waterproof material may be used as long as it is liquid and has coagulability.

  FIG. 2 is a view showing a lens assembly waterproofed by the lens waterproofing method of the present invention.

  As shown in FIG. 2, the lens assembly 20 waterproofed by the lens waterproofing method described above includes a lens frame 14 in which the single lenses 11 and 12 are disposed, and a single lens disposed in the lens frame 14. 11 and 12 and a rubber film 19 covering a region excluding the front surface 13a and the rear surface 13b serving as an optical path of the lens 13 including the single lenses 11 and 12 disposed in the lens frame 14.

  The rubber film 19 in this embodiment corresponds to a liquid and solidifying waterproof material referred to in the lens assembly of the present invention. The waterproof material is not limited to rubber, and any waterproof material may be used as long as it has waterproof properties.

  Next, another embodiment of the lens assembly of the present invention will be described. This embodiment shows an embodiment in which this lens assembly is used by being attached to a camera body, for example.

Figure 3 is a diagram showing another example of the lenses assembly.

Lenses assembly 30 of this, as shown in FIG. 3, the lens frame 34 to the single lens 11 (see FIG. 2) is disposed, and a single lens arranged in the lens frame 34, the lens Of the lens 13 (see FIG. 2), which is a single lens disposed in the frame 34, has a rubber film 39 that covers a region excluding the front surface 13a and the rear surface 13b that serve as an optical path, and this lens frame 34 has an attachment part 31 for attaching the lens frame 34 to another member 38 such as a camera body, and the rubber film 39, that is, the waterproof material according to the present invention also covers the attachment part 31. It has a configuration.

  According to this lens assembly 30, since the attachment portion 31 is also covered with the rubber film 39, excellent waterproofness can be obtained even when this lens assembly 30 is attached to another member 38. .

Figure 4 is a diagram showing an example of the lenses assembly applications.

Figure 4 is an example of using the lenses assembly as vehicle rear monitoring camera is shown. That is, when a camera 42 is attached to the rear bumper 41 of the automobile 40 and a reverse gear operation is performed, an image captured by the camera 42 is displayed on a monitor screen (not shown) installed in a driver's seat or the like. By displaying the information, the driver can easily confirm the backward direction.

Since this lens assembly is excellent in waterproofness and can be manufactured at a low cost, it can be suitably used not only as a lens for the above-mentioned automobile rear surveillance camera, but also widely used in general applications.

It is a figure which shows the process of the lens waterproofing processing method of this invention. It is a figure which shows the lens assembly waterproofed by the lens waterproofing processing method of this invention. It is a diagram showing another example of the lenses assembly. Is a diagram illustrating an example of lenses assembly applications.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11, 12 Single lens 13 Lens 13a Front surface 13b Rear surface 14 Lens frame 15, 16 Masking jig 17 Liquid rubber 18 Tank 19 Rubber film 20 Lens assembly 30 Lens assembly 31 Attachment part 34 Lens frame 38 Other members 39 Rubber film 40 Car 41 Rear bumper 42 Camera

Claims (1)

A plurality of single lenses are arranged in a lens frame in which a plurality of single lenses are arranged, and a front surface and a rear surface serving as an optical path are masked among lenses made of a plurality of single lenses arranged in the lens frame. ,
A lens waterproofing method, comprising: immersing the lens frame in a liquid and solidifying waterproof material together with a plurality of single lenses in the lens frame.

Images