JP3039412U - Scanner lens fixing device - Google Patents

Abstract

(57) Abstract: A lens fixing device for a scanner is provided, which prevents the lens from falling off and being damaged by movement during the period from assembly of the lens to adjustment of the focal length. A lens 2 and a mounting portion 1 are provided. The mounting portion 1 has a cylindrical insertion portion 3 whose inner diameter is slightly larger than the lens outer diameter.
An adhesive injection port 6 and two pressing plates 31 extending toward the center of the insertion portion 3 are provided on the outside. In addition, inside the insertion portion 3 and the pressing plate 31, a plurality of ridges 311,
There is 312. The adjustment of the focal length of the lens is performed by first inserting the lens 2 into the insertion portion 3 and using the pressing plate 31 of the insertion portion 3 and the convex ridges 311 and 312 inside to press and fix the lens surface. Then, the lens is fixed by injecting the adhesive from the adhesive injection port.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a lens fixing device for a scanner, and more particularly to a device for assembling and fixing a lens before adjusting a lens focus of a scanner.

[0002]

[Prior art]

 Assembling the lens of a conventional scanner is jointly performed by two workers on the production line. The first worker temporarily installs the lens in the relevant part of the scanner, and the second worker adjusts the focal length of the lens and then fixes it. There are three methods for assembling the lens. The first method is to insert the lens 2'into the insert 3'in the mounting part 1'of the scanner, as shown in FIG. Insert the screw 5'into the screw hole 4'on the mounting part 1'and tighten. This causes the screw 5'to push the surface of the lens 2'downward, temporarily fixing the lens and allowing the second operator to adjust the focal length. However, fixing with screws is relatively troublesome, and it is easy to damage the lens surface with screws. For this reason, another method was devised. As shown in FIG. 2, the lens 2'is inserted into the insertion portion 3'of the mounting portion 1 ', and the adhesive is injected from the adhesive injection port 6'above the insertion portion 3'and fixed. Adjust the focal length of the lens before the adhesive dries. However, the outer diameter of the lens 2'is slightly smaller than the inner diameter of the insertion portion 3 ', and when the adhesive is not dry, it is likely to fall and break before being handed over to a second worker on the production line. In addition, as shown in Fig. 3, when two ridges are added to the insertion part 3'and the lens 2'is inserted into the insertion part 3 ', the ridges inside the insertion part 3'support the lens. Is a little easier to fix than the above method. However, if the adhesive is vibrated before it dries, the lens will slip out.

[0003]

[Problems to be solved by the device]

 It is an object of the present invention to provide a lens fixing device for a scanner in which the lens does not fall out and become damaged due to movement from the time the lens is assembled until the focal length is adjusted.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, the lens may fall out and be damaged due to movement from the time when the pressing plate and the ridges are installed and the lens is assembled until the focal length is adjusted. No scanner lens fixing device is provided.

[0005]

[Embodiment of the invention]

 As shown in FIGS. 4 and 5, the lens fixing device of the scanner of the present invention mainly comprises one lens 2 and one mounting portion 1. The mounting portion 1 has a cylindrical insertion portion 3 having an inner diameter slightly larger than the outer diameter of the lens. An adhesive injection port 6 is installed on the outer surface of the insertion portion 3. In addition, there are two pressing plates 31 extending toward the center of the insertion part 3 near the opening, two upper ridges 312 on the back side of the pressing plate 31, and corresponding to the upper ridges inside the insertion part. A lower ridge 311 is installed. Furthermore, when the lens 2 is inserted into the insertion portion 3 of the mounting portion 1, the lens 2 pushes and opens the pressing plate 31 toward the outside, and the pressing plate 31 generates a force to push it back inward, so that the pressing plate 31 and its An upper convex ridge 312 installed on the back side compresses the lens surface, and a lower convex ridge 311 in the insertion portion also supports the lens, so that the lens 2 is completely fixed and convenient for focus adjustment.

[0006]

[Effect of the invention]

 The present invention has a pressing plate and a ridge on the insertion part, and the lens fixing device of the scanner does not fall out and be damaged by movement during the period from assembling the lens to adjusting the focal length. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first conventional fixing method example.

FIG. 2 is a perspective view showing a second conventional fixing method example.

FIG. 3 is a perspective view showing a third example of a conventional fixing method.

FIG. 4 is a perspective view showing an embodiment of the present invention.

FIG. 5 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 (1) Mounting part (2) Lens (3) Insertion part (31) Press plate (311) Lower ridge (312) Upper ridge (6) Adhesive injection port

Claims (1)

[Utility model registration claims] 1. A lens mainly comprises one lens and one mounting portion, and the mounting portion has a cylindrical insertion portion having an inner diameter slightly larger than the lens outer diameter, and an adhesive pouring on the outer surface of the insertion portion. An inlet is installed, and there are two pressing plates extending toward the center of the insertion part, two upper ridges on the back side of the pressing plate, and there are lower ridges corresponding to the upper ridges inside the insertion part. When inserting the lens into the insertion part, the lens pushes the pressure plate outward and opens the force to push it back inward, and the pressure plate and the upper ridges installed on the back side of the lens come into contact with the lens. A scanner lens fixing device that compresses the surface, supports the lens by the lower ridge in the insertion part, and fixes the lens so that the focus can be adjusted.