Simple focusing eyepiece lens

Abstract

The utility model discloses a simple and easy adjustable focus eyepiece lens, including lens no.

Description

Technical Field

[0001] This utility model relates to a simple adjustable focus eyepiece lens. Background Technology

[0002] Currently, simple adjustable focus eyepiece lenses are available on the market. Figures 1 to 3 As shown, the system includes a lens, a guide tube, a curved tube, a lens barrel, a pressure ring, and a focusing wheel. The lens is installed inside the lens barrel and locked in place by the pressure ring. The lens barrel is fitted inside the guide tube, which has a front-to-back extending strip groove in its middle section. The curved tube is fitted outside the guide tube, and a spiral groove is provided on the surface of its middle section. A protruding post is present on the outer wall of the lens barrel, nested in the strip groove and the spiral groove, and can slide back and forth along the strip groove. The lens is installed at the front end of the curved tube, and a locking block protrudes from the middle of the outer surface of the curved tube. The focusing wheel is fitted outside the curved tube, and a locking groove is provided on the focusing wheel. The locking block is nested in the locking groove so that the focusing wheel can drive the curved tube to rotate. An eyepiece cover is also installed at the front end of the curved tube.

[0003] The existing structure has the following technical problems: too many parts, resulting in more mold openings (because most components are plastic parts), complicated installation, and high manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a simple adjustable focus eyepiece lens, which solves the technical problems of existing simple adjustable focus eyepiece lenses having too many parts, resulting in multiple molds, complicated installation, and high manufacturing costs.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A simple adjustable eyepiece lens includes a first lens, a second lens, a guide tube, a curved tube, a lens barrel, a retaining ring, and a focusing wheel. The second lens is installed in the lens barrel and locked in place by the retaining ring. The lens barrel is fitted inside the guide tube, which has a strip-shaped groove extending forward and backward in its middle section. The curved tube is fitted outside the guide tube, and a spiral groove is provided on the surface of its middle section. A protruding post is provided on the outer wall of the lens barrel, which is nested in the strip-shaped groove and the spiral groove and can slide forward and backward along the strip-shaped groove. The first lens is installed at the front end of the curved tube, and a locking block protrudes from the middle of the outer surface of the curved tube. The focusing wheel is fitted outside the curved tube, and a locking groove is provided on the focusing wheel. The locking block is nested in the locking groove so that the focusing wheel can drive the curved tube to rotate. The feature is that the front end of the focusing wheel extends to the front of the guide tube, and the front end of the focusing wheel is recessed with an annular baffle inclined to the optical axis L. A through hole is formed in the middle of the annular baffle to expose the first lens.

[0007] Preferably, the annular baffle is conical.

[0008] Preferably, the surface of the annular baffle is provided with several rings of raised texture.

[0009] Compared with the prior art, this utility model has the following advantages:

[0010] Effect 1: Based on the original eyepiece lens, this utility model integrates the focusing wheel and the eyepiece cover into one part, reducing the number of parts, reducing mold opening, lowering manufacturing costs, and simplifying installation.

[0011] Other advantages of this invention will be described in more detail in the Embodiments section. Attached Figure Description

[0012] Figure 1 A stereoscopic diagram of a traditional, simple, adjustable eyepiece lens;

[0013] Figure 2 An exploded view of a traditional, simple, adjustable-focus eyepiece lens.

[0014] Figure 3 A cross-sectional view of the structure of a traditional, simple, adjustable-focus eyepiece lens;

[0015] Figure 4 This is a perspective view of the present invention from one angle;

[0016] Figure 5 This is a perspective view of the present invention from another angle;

[0017] Figure 6 This is an exploded view of the present invention;

[0018] Figure 7 This is the front view of the present invention;

[0019] Figure 8 for Figure 7 AA section view;

[0020] Figure 9 yes Figure 8 BB cross-sectional view. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Example 1:

[0023] like Figures 4 to 9This embodiment provides a simple adjustable focus eyepiece lens, including a first lens 1, a second lens 2, a guide tube 3, a curved tube 4, a lens barrel 5, a retaining ring 6, and a focusing wheel 7. The second lens 2 is installed inside the lens barrel 5 and locked in place by the retaining ring 6. The lens barrel 5 is fitted inside the guide tube 3, and a strip groove 31 extending forward and backward is provided in the middle of the guide tube 3. The curved tube 4 is fitted outside the guide tube 3, and a spiral groove 41 is provided on the surface of the middle part of the curved tube 4. A protruding post 51 protrudes from the outer wall of the lens barrel 5, and the protruding post 51 is nested in the strip groove 31 and the spiral groove 41. The lens 1 can slide back and forth along the strip groove 31. The lens 1 is mounted at the front end of the curved cylinder 4. A locking block 42 protrudes from the middle of the outer surface of the curved cylinder 4. The focusing wheel 7 is fitted onto the outside of the curved cylinder 4, and a slot 71 is provided on the focusing wheel 7. The locking block 42 is nested in the slot 71 so that the focusing wheel 7 can drive the curved cylinder 4 to rotate. The key feature is that the front end of the focusing wheel 7 extends to the front of the guide cylinder 3, and a ring-shaped baffle 72 inclined to the optical axis L is recessed behind the front end of the focusing wheel 7. A through hole 73 is formed in the middle of the ring-shaped baffle 72 to expose the lens 1. This utility model integrates the focusing wheel and the eyepiece cover into one part based on the original eyepiece lens, reducing the number of parts, reducing mold opening, lowering manufacturing costs, and simplifying installation.

[0024] Preferably, the annular baffle 72 is conical.

[0025] Preferably, the surface of the annular baffle 72 is provided with several rings of raised texture 74 to reduce stray light interference.

[0026] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A simple adjustable eyepiece lens, comprising a first lens (1), a second lens (2), a guide tube (3), a curved tube (4), a lens barrel (5), a retaining ring (6), and a focusing wheel (7), wherein the second lens (2) is installed in the lens barrel (5) and locked in place by the retaining ring (6), the lens barrel (5) is fitted inside the guide tube (3), the guide tube (3) has a front-to-back extending strip groove (31) in the middle, the curved tube (4) is fitted outside the guide tube (3), the curved tube (4) has a spiral groove (41) on the surface of the middle part of the curved tube (4), and the lens barrel... (5) has a protruding post (51) on its outer side wall. The protruding post (51) is nested in the strip groove (31) and the spiral groove (41) and can slide back and forth along the strip groove (31). Lens 1 (1) is installed at the front end of the curved cylinder (4). A locking block (42) protrudes from the middle of the outer surface of the curved cylinder (4). The focusing wheel (7) is fitted on the outside of the curved cylinder (4). A locking groove (71) is provided on the focusing wheel (7). The locking block (42) is nested in the locking groove (71) so that the focusing wheel (7) can drive the curved cylinder (4) to rotate. The feature is: The front end of the focusing wheel (7) extends to the front of the guide tube (3). The front end of the focusing wheel (7) is recessed to the rear and has an annular baffle (72) inclined to the optical axis L. A through hole (73) is formed in the middle of the annular baffle (72) to expose the lens (1).

2. The simple adjustable focus eyepiece lens according to claim 1, characterized in that: The annular baffle (72) is conical.

3. A simple adjustable-focus eyepiece lens according to claim 1 or 2, characterized in that: The surface of the annular baffle (72) is provided with several rings of raised texture (74).

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