CN111751950A

CN111751950A - Structure for automatically matching and compensating fit clearance inside ocular lens

Info

Publication number: CN111751950A
Application number: CN201910230645.7A
Authority: CN
Inventors: 张远; 庄建彬; 司红旗
Original assignee: Wuhan Huoxiong Optical Technology Co ltd
Current assignee: Wuhan Huoxiong Optical Technology Co ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-10-09

Abstract

The invention provides a structure for automatically matching and compensating an internal fit clearance of an eyepiece, which comprises a shell and an eyepiece lens holder, wherein the shell is provided with a cavity for accommodating the eyepiece lens holder, the eyepiece lens holder is arranged in the cavity of the shell, and a positioning mechanism for limiting the eyepiece lens holder to automatically move in the cavity is arranged between the inner wall of the cavity of the shell and the eyepiece lens holder. The positioning mechanism limits the eyepiece lens seat to move in the cavity of the shell automatically through elastic acting force. Eliminate the hand feeling difference between the shell and the eyepiece lens seat caused by the fit clearance difference and the abnormal sound problem when shaking, and has low cost, simple assembly and high practicability.

Description

Structure for automatically matching and compensating fit clearance inside ocular lens

Technical Field

The invention relates to an eyepiece, in particular to a structure for automatically matching and compensating an inner matching gap of the eyepiece.

Background

Currently, the primary difference in the structure of the eyepiece is the design of the housing, one: the shell is split into two parts, namely a U-shaped lower shell and an upper cover; II, secondly: the housing is designed as a one-piece cavity.

The first method has the advantages that the shell is split into two parts, compared with the second method, the second method has the defects of high cost and complex assembly, but is beneficial to adjusting and eliminating the assembly gap between the shell and the movable lens base, and abnormal sound can not occur when the eyepiece receives external force impact or shakes;

the second method has the advantages of low cost and simple assembly, but because the existence of the draft angle causes a gap between the movable lens base and the shell, abnormal sound exists when external force impact or shaking is received;

the scheme provides an improved method which can eliminate the abnormal sound problem in the eyepiece while reducing the cost and simplifying the assembly.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a structure for automatically matching and compensating the fit clearance in an eyepiece.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides an automatic match and structure in compensation eyepiece internal fit clearance, includes shell and eyepiece microscope base, and the shell is equipped with the cavity that is used for holding eyepiece microscope base, and eyepiece microscope base sets up in the cavity of shell, be equipped with between the cavity inner wall of shell and the eyepiece microscope base and be used for restricting eyepiece microscope base and produce the positioning mechanism of motion in the cavity by oneself.

The positioning mechanism limits the eyepiece lens seat to move in the cavity of the shell automatically through elastic acting force.

The positioning mechanism is made of elastic foam.

The inner wall of the cavity of the shell or the outer wall of the eyepiece lens holder is at least provided with two pieces of foam which are correspondingly arranged.

The foam is sheet-shaped or strip-shaped.

The invention has the beneficial effects that: the invention provides a structure for automatically matching and compensating the matching clearance in an eyepiece, which can eliminate the hand feeling difference between a shell and an eyepiece lens seat caused by the matching clearance difference and the abnormal sound problem during shaking, and has the advantages of low cost, simple assembly and high practicability.

Drawings

FIG. 1 is a first schematic view of a conventional fitting structure of a housing and an eyepiece lens holder;

FIG. 2 is a schematic diagram of a second conventional fitting structure of a housing and an eyepiece lens holder;

FIG. 3 is a schematic structural diagram of an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 5 is a schematic diagram of a third structure according to an embodiment of the present invention.

Detailed Description

In the conventional technology, as shown in fig. 1 to 2, when a housing 1 of an eyepiece is designed into a complete cavity, due to limitations in terms of molding process, part space, cost and the like, the cavity has a draft angle, which is approximately 1 to 3 degrees, on the forward and backward movement of a movable eyepiece lens holder 2. The draft angle is exaggerated in the drawing for the purpose of illustrating the principle of influence of the draft angle. 1 is a shell; 2 is an eyepiece lens base;

due to the existence of the draft angle, when the front and back movement of the eyepiece lens holder 2 changes from the nearest focus dn to the farthest focus df, the gaps d0 and d 0' between the eyepiece lens holder 2 and the inner wall of the cavity of the housing 1 are different, so that on one hand, the difference of hand feeling during the diopter adjustment can be caused by different resistances, and on the other hand, if the eyepiece lens holder 2 is impacted by external force at the farthest end, the movable eyepiece lens holder can shake in the cavity, so that abnormal sound can occur.

If these two effects are to be eliminated, the most basic method is to reduce the draft angle to 0, but this complicates the mold structure and increases the cost.

The method can solve the problems of hand feeling and abnormal sound at the lowest cost by compensating the difference of the fit clearance caused by the draft angle.

The first embodiment; as shown in figure 3, a structure for automatically matching and compensating the fit clearance inside an eyepiece comprises a shell 1 and an eyepiece lens holder 2, wherein the shell 1 is provided with a cavity for accommodating the eyepiece lens holder 2, the eyepiece lens holder 2 is arranged in the cavity of the shell 1, and a positioning mechanism 3 for limiting the eyepiece lens holder 2 to automatically move in the cavity is arranged between the inner wall of the cavity of the shell 1 and the eyepiece lens holder 2.

The positioning mechanism 3 limits the eyepiece lens base 2 to move in the cavity of the shell 1 automatically through elastic acting force; the positioning mechanism 3 is elastic foam; at least two pieces of foam which are correspondingly arranged are arranged on the inner wall of the cavity of the shell 1 or the outer wall of the eyepiece lens holder 2; the foam is sheet-shaped or strip-shaped. One embodiment is that by filling foam between the housing 1 and the movable mirror base, different gaps in different states can be adapted due to the elasticity of the foam.

Example two; as shown in fig. 4, the difference between the present embodiment and the first embodiment is that the positioning mechanism 3 is a spring sheet; the shell fragment have elastic lug boss, the shell fragment is fixed to be set up in the cavity inner wall of the outer casing 1 or eyepiece microscope base 2 outer wall, the second embodiment sets up a shell fragment between outer casing 1 and moving lens base, in order to match and compensate the most far focus and the clearance difference when the most near focus. Example three; as shown in fig. 5, the difference between this embodiment and the first embodiment is that the positioning mechanism 3 is a rubber ring; the rubber ring is sleeved on the outer wall of the eyepiece lens base 2, in the third embodiment, the rubber ring is arranged on the movable lens base, and the elasticity of rubber is utilized to match and compensate the difference of the gap.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to explain the principles of the invention, and that various modifications and substitutions can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an automatic match and structure of compensation eyepiece internal fit clearance, includes shell and eyepiece microscope base, and the shell is equipped with the cavity that is used for holding eyepiece microscope base, and eyepiece microscope base sets up in the cavity of shell, its characterized in that, be equipped with between the cavity inner wall of shell and the eyepiece microscope base and be used for restricting eyepiece microscope base and produce the positioning mechanism of motion in the cavity by oneself.

2. The arrangement for automatically matching and compensating for a mating clearance in the interior of an eyepiece of claim 1 wherein the positioning mechanism limits the eyepiece holder from moving itself within the housing cavity by elastic forces.

3. A structure for automatically matching and compensating for a fitting clearance in an eyepiece as claimed in claim 1 or 2, wherein said positioning means is a foam having elasticity.

4. The structure for automatically matching and compensating the internal fitting clearance of the eyepiece as claimed in claim 3, wherein the inner wall of the cavity of the housing or the outer wall of the eyepiece holder is provided with at least two correspondingly arranged foams.

5. The structure for automatically matching and compensating for the fitting clearance in the eyepiece as recited in claim 4, wherein said foam is in the form of a sheet or strip.

6. The structure for automatically matching and compensating for the fitting clearance in the eyepiece of claim 1 or 2, wherein the positioning mechanism is a resilient piece.

7. The structure for automatically matching and compensating for the internal fitting clearance of an eyepiece as claimed in claim 6, wherein the resilient tab has a resilient projection, and the resilient tab is fixedly disposed on the inner wall of the cavity of the housing or the outer wall of the eyepiece holder.

8. A structure for automatically matching and compensating for a fitting clearance in an eyepiece as claimed in claim 1 or 2, wherein said positioning means is a rubber ring.

9. The structure for automatically matching and compensating for the internal fitting clearance of an eyepiece as claimed in claim 8, wherein the rubber ring is sleeved on the outer wall of the eyepiece holder.