Eyepiece diopter adjusting mechanism

Abstract

The utility model belongs to the technical field of optical instruments, and discloses an eyepiece diopter adjusting mechanism which comprises an eyepiece mounting flange, a focusing lens barrel, a diopter adjusting ring, an adjusting ring check ring, an eyeshade assembly and a guide nail. Movement adjustment of the lens is completed by adopting a sliding sleeve structure and a guide structure of a guide groove and a guide nail, radial rotation of the focusing lens cone is limited, and the problem that the eyeshade can rotate along with the diopter adjusting ring is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to optical instrument technical field relates to a kind of eyepiece diopter adjustment mechanism. BACKGROUND

[0002] In the current thermal imager field, eyepiece diopter adjustment mechanism mainly adopts sliding sleeve structure, three-petal thread and cam knob design.

[0003] In sliding sleeve structure, eyecup is connected with diopter adjustment ring by clamping groove, and diopter adjustment ring is directly connected with focusing lens barrel. Therefore, when adjusting diopter, not only circumferential movement will be generated, but also radial rotation will be caused, and eyecup is rotated synchronously.

[0004] Three-petal thread adjustment mode solves the problem of radial rotation of sliding sleeve structure to some extent, but its processing process is complex, cost is higher, and mirror body needs to be slotted into three-pronged shape, which causes large deformation and affects adjustment accuracy. In addition, three-pronged mirror body structure causes certain limitation to lens design.

[0005] Cam knob adjustment mode can solve the problem of eyecup rotation, but due to the limitation of adjustment mechanism, when large stroke adjustment is needed, it is difficult to achieve, and the knob design of protruding mirror body is not suitable for some miniaturized products. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of eyepiece diopter adjustment mechanism to solve at least one technical problem mentioned in the background art.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0008] An eyepiece diopter adjustment mechanism, comprising: an eyepiece mounting flange, a focusing lens barrel, a diopter adjustment ring, an adjustment ring stop ring, an eyecup assembly and a guide pin;

[0009] The eyepiece mounting flange is sleeved on the outer circumferential surface of one end of the focusing lens barrel, and the two are in sliding fit; the eyecup assembly is fixedly connected with the other end of the focusing lens barrel;

[0010] A radial threaded hole is provided through the circumferential surface of the eyepiece mounting flange, and a guide groove is provided on the circumferential surface of the focusing lens barrel along its axial direction; the guide pin is installed in the radial threaded hole of the eyepiece mounting flange, and the distal end of the guide pin extends out of the radial threaded hole and is in sliding fit with the guide groove of the focusing lens barrel;

[0011] The outer circumferential surface of the eyepiece mounting flange is provided with external threads, the inner circumferential surface of the diopter adjusting ring is provided with internal threads, the diopter adjusting ring is sleeved on the outer periphery of the whole structure composed of the eyepiece mounting flange and the focusing lens barrel, and the internal threads of the diopter adjusting ring are threadedly connected with the external threads of the eyepiece mounting flange.

[0012] The inner circumferential surface of the diopter adjusting ring is provided with a limiting inner convex ring in the circumferential direction, the outer circumferential surface of the focusing lens barrel is provided with a limiting outer convex ring in the circumferential direction, the adjusting ring stopper is detachably fixedly sleeved on the outer circumferential surface of the focusing lens barrel, and the adjusting ring stopper, the limiting outer convex ring and the outer circumferential surface of the focusing lens barrel form an annular limiting groove for accommodating and limiting the limiting inner convex ring.

[0013] Further, the eyecup assembly comprises an eyecup mounting ring and an eyecup, one end of the eyecup mounting ring is threadedly connected with the focusing lens barrel, and the other end is used for mounting the eyecup.

[0014] Further, the eyecup assembly further comprises an eyecup pressing ring sleeved on the outer circumferential surface of the mounting ring and the mounting part of the eyecup.

[0015] Further, the outer circumferential surface of the eyecup mounting ring is provided with a mounting outer convex ring in the circumferential direction, the inner circumferential surface of the mounting end of the eyecup is provided with a mounting inner convex ring in the circumferential direction, and the eyecup pressing ring, the mounting outer convex ring and the outer circumferential surface of the eyecup mounting ring form a mounting groove in the form of an annular groove for accommodating and limiting the mounting inner convex ring.

[0016] Further, the end of the adjusting ring stopper close to the eyecup is flush with the end of the focusing lens barrel, and the end of the eyecup pressing ring away from the eyecup abuts against the end of the adjusting ring stopper.

[0017] Further, the adjusting ring stopper is threadedly sleeved on the outer circumferential surface of the focusing lens barrel and is fixed by a stop screw.

[0018] Further, sealing rings are arranged on the contact surfaces of the eyepiece mounting flange and the focusing lens barrel and the contact surfaces of the adjusting ring stopper and the diopter adjusting ring.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The components of the eyepiece diopter adjustment mechanism are all cylindrical parts, simple in structure, simple in processing, easy to ensure the processing precision and simple in production and assembly. The movement adjustment of the lens is completed by adopting the sliding sleeve structure and the guiding structure of the guide pin and the guide groove, the radial rotation of the focusing lens barrel is limited, and the problem that the eyecup rotates with the diopter adjustment ring is solved. The eyecup mounting ring is in threaded connection with the focusing lens barrel, the eyecup pressing ring and the eyecup mounting ring clamp the eyecup in the middle, compared with the conventional clamping groove connection, the reliability of the eyepiece is improved, and the phenomenon that the eyecup is easily detached during use is effectively prevented. Multiple sealing rings are arranged, multiple sealing of the eyepiece is realized, the waterproof level of the eyepiece is improved, and the damping feeling during the adjustment of the diopter is also increased. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0022] Fig. 1 It is an overall structural schematic view of the eyepiece diopter adjustment mechanism.

[0023] Fig. 2 It is a cross-sectional structural schematic view of the eyepiece diopter adjustment mechanism.

[0024] Fig. 3 It is an exploded structural schematic view of the eyepiece diopter adjustment mechanism.

[0025] Wherein:

[0026] 1-eyepiece mounting flange, 101-radial threaded hole, 2-sealing ring I, 3-focusing lens barrel, 301-guide groove, 302-limiting outer convex ring, 4-guide pin, 5-sealing ring II, 6-diopter adjustment ring, 601-limiting inner convex ring, 7-sealing ring III, 8-adjustment ring retainer ring, 9-eyecup pressing ring, 10-eyecup mounting ring, 11-eyecup, 12-stopping screw. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present application, the present application will be described in more detail and more carefully in combination with the drawings and preferred embodiments of the specification, but the protection scope of the present application is not limited to the following specific embodiments.

[0028] Unless otherwise defined, all professional terms used in the following have the same meaning as understood by those skilled in the art. The professional terms used in the present application are only for the purpose of describing specific embodiments, and are not intended to limit the protection scope of the present application.

[0029] Reference Figs. 1-3The embodiment discloses an eyepiece diopter adjustment mechanism, which comprises an eyepiece mounting flange 1, a focusing lens barrel 3, a diopter adjustment ring 6, an adjustment ring retainer 8, an eyecup assembly and a guide pin 4. The eyepiece mounting flange 1 is sleeved on the outer circumferential surface of one end of the focusing lens barrel 3 and is in sliding fit with the focusing lens barrel 3; and the eyecup assembly is fixedly connected with the other end of the focusing lens barrel 3.

[0030] In the embodiment, two radial threaded holes 101 are arranged through the circumferential surface of the eyepiece mounting flange 1, the two radial threaded holes 101 are uniformly distributed in the circumferential direction of the circumferential surface, the circumferential surface of the focusing lens barrel 3 is provided with two guide grooves 301 oppositely arranged along the axial direction, and the two guide grooves 301 are symmetrically distributed on the circumferential surface; the guide pin 4 is mounted in the radial threaded hole 101 of the eyepiece mounting flange 1, and the end of the guide pin 4 extends out of the radial threaded hole 101 and is in sliding fit with the guide groove 301 of the focusing lens barrel 3. In the assembled state, the eyepiece mounting flange 1 is in sliding fit with the two guide grooves 301 through the two radial threaded holes 101 and the two guide pins 4 on the eyepiece mounting flange 1.

[0031] In the embodiment, the outer circumferential surface of the eyepiece mounting flange 1 is provided with external threads, the inner circumferential surface of the diopter adjustment ring 6 is provided with internal threads, the diopter adjustment ring 6 is sleeved on the outer circumferences of the integral structure composed of the eyepiece mounting flange 1 and the focusing lens barrel 3, and the internal threads of the diopter adjustment ring 6 are in threaded connection with the external threads of the eyepiece mounting flange 1.

[0032] In the embodiment, the inner circumferential surface of the diopter adjustment ring 6 is provided with a limiting inner convex ring 601 in the circumferential direction, the outer circumferential surface of the focusing lens barrel 3 is provided with a limiting outer convex ring 302 in the circumferential direction, the adjustment ring retainer 8 is detachably fixedly sleeved on the outer circumferential surface of the focusing lens barrel 3, and an annular limiting groove is formed between the adjustment ring retainer 8, the limiting outer convex ring 302 and the outer circumferential surface of the focusing lens barrel 3, and is used for accommodating and limiting the limiting inner convex ring 601.

[0033] In the embodiment, the detachable fixing manner of the adjustment ring retainer 8 is that the adjustment ring retainer 8 is threadedly sleeved on the outer circumferential surface of the focusing lens barrel 3 and is fixed by a stop screw 12. Specifically, the outer circumferential surface of the focusing lens barrel 3 is provided with external threads, the inner circumferential surface of the adjustment ring retainer 8 is provided with internal threads, and the two are in threaded connection. In the assembled state, the adjustment ring retainer 8 is rotated to the end to be in contact with the limiting inner convex ring 601 of the diopter adjustment ring 6, and the annular limiting groove just accommodates the limiting inner convex ring 601, so that the diopter adjustment ring 6 is axially limited.

[0034] In the embodiment, the eyecup assembly comprises an eyecup mounting ring 10 and an eyecup 11, one end of the eyecup mounting ring 10 is in threaded connection with the focusing lens barrel 3, and the other end is used for mounting the eyecup 11. Specifically, the outer circumferential surface of the mounting end of the eyecup mounting ring 10 is provided with external threads, the inner circumferential surface of the mounting end of the focusing lens barrel 3 is provided with internal threads, and the two are in threaded fit connection.

[0035] In the embodiment, the eyecup assembly further comprises an eyecup pressing ring 9 sleeved on the outer circumferential surface of the eyecup mounting ring 10 and the mounting position of the eyecup 11. Specifically, the outer circumferential surface of the eyecup mounting ring 10 is provided with an outer mounting convex ring in the circumferential direction, the inner circumferential surface of the mounting end of the eyecup 11 is provided with an inner mounting convex ring in the circumferential direction, and the outer circumferential surface of the eyecup mounting ring 10, the eyecup pressing ring 9 and the mounting outer convex ring form an annular mounting groove for accommodating the mounting inner convex ring and axially limiting the mounting inner convex ring. More specifically, the end edge of the eyecup pressing ring 9 is provided with an axial boss extending in the axial direction of the eyecup, and in the assembled state, the axial boss is in contact with the outer circumferential surface of the eyecup 11, further limiting the eyecup 11 in the radial direction.

[0036] In the embodiment, the end of the adjusting ring stop ring 8 close to the eyecup is flush with the end of the focusing lens barrel 3, and the end of the eyecup pressing ring 9 away from the eyecup is in abutment with the end of the focusing lens barrel 3 and the adjusting ring stop ring 8. In the assembled state, the eyecup mounting ring 10 can be screwed to the abutment position of the end of the eyecup pressing ring 9 sleeved on the outer circumferential surface of the eyecup mounting ring 10 and the end of the focusing lens barrel 3 and the adjusting ring stop ring 8 through the threaded configuration of the eyecup mounting ring 10 and the focusing lens barrel 3, and the contact between the components can further ensure the structural stability of the whole.

[0037] In the embodiment, the contact surface of the eyepiece mounting flange 1 and the focusing lens barrel 3 is provided with a sealing ring I 2 and a sealing ring II 5, and the contact surface of the adjusting ring stop ring 8 and the diopter adjusting ring 6 is provided with a sealing ring III 7. In the assembled state, this structure can increase the damping feeling when adjusting the diopter while ensuring waterproofness.

[0038] Working principle:

[0039] When adjusting the diopter, the diopter adjusting ring 6 is rotated spirally, the annular limiting groove limits the axial movement of the diopter adjusting ring 6 through the limiting inner convex ring 601, the eyepiece mounting flange 1 is fixed to the specific application device, and the focusing lens barrel 3 does not rotate under the guidance of the guide nail 4 and the guide groove 301, so as to drive the focusing lens barrel 3 in the eyepiece mounting flange 1 to move forward and backward without rotating, and the eyecup 11 also does not rotate radially during the forward and backward movement of the focusing lens barrel 3.

[0040] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can be changed and varied for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the scope of the utility model.

Claims

1. An eyepiece diopter adjustment mechanism, characterized in that, include: Eyepiece mounting flange, focusing lens barrel, diopter adjustment ring, adjustment ring retainer, eyecup assembly, and guide pin; The eyepiece mounting flange is fitted onto the outer circumferential surface of one end of the focusing lens barrel, and the two are in a sliding fit; the eyecup assembly is fixedly connected to the other end of the focusing lens barrel. A radial threaded hole is provided through the circumferential surface of the eyepiece mounting flange, and a guide groove is provided along its axial direction on the circumferential surface of the focusing lens barrel; the guide pin is installed in the radial threaded hole of the eyepiece mounting flange, and the end of the guide pin extends out of the radial threaded hole and slides in cooperation with the guide groove of the focusing lens barrel. The outer circumferential surface of the eyepiece mounting flange is provided with an external thread, and the inner circumferential surface of the diopter adjustment ring is provided with an internal thread. The diopter adjustment ring is sleeved on the outer circumference of the integral structure composed of the eyepiece mounting flange and the focusing lens tube, and the internal thread of the diopter adjustment ring is threadedly connected to the external thread of the eyepiece mounting flange. The inner circumferential surface of the diopter adjustment ring is provided with a limiting inner convex ring along the circumferential direction, and the outer circumferential surface of the focusing lens barrel is provided with a limiting outer convex ring along the circumferential direction. The adjustment ring retainer is detachably and fixedly sleeved on the outer circumferential surface of the focusing lens barrel. An annular limiting groove is formed between the adjustment ring retainer, the limiting outer convex ring, and the outer circumferential surface of the focusing lens barrel to accommodate the limiting inner convex ring and limit the limiting inner convex ring.

2. The eyepiece diopter adjustment mechanism as described in claim 1, characterized in that, The eye patch assembly includes an eye patch mounting ring and an eye patch. One end of the eye patch mounting ring is threadedly connected to the focusing lens barrel, and the other end is used to install the eye patch.

3. The eyepiece diopter adjustment mechanism as described in claim 2, characterized in that, The goggles assembly also includes a goggles pressure ring fitted onto the outer circumference of the goggles mounting ring and the goggles mounting area.

4. The eyepiece diopter adjustment mechanism as described in claim 3, characterized in that, An outer mounting protrusion is provided on the outer circumferential surface of the eye mask mounting ring, and an inner mounting protrusion is provided on the inner circumferential surface of the mounting end of the eye mask. An annular mounting groove is formed between the eye mask pressure ring, the outer mounting protrusion, and the outer circumferential surface of the eye mask mounting ring to accommodate and limit the inner mounting protrusion.

5. The eyepiece diopter adjustment mechanism as described in claim 3 or 4, characterized in that, The adjustment ring retainer is flush with the end of the focusing lens barrel near the eyecup and abuts against the end of the eyecup pressure ring away from the eyecup.

6. The eyepiece diopter adjustment mechanism as described in claim 1, characterized in that, The adjusting ring retaining ring is threaded onto the outer circumferential surface of the focusing lens barrel and is fixed by a locking screw.

7. The eyepiece diopter adjustment mechanism as described in claim 1, characterized in that, Sealing rings are provided on the contact surfaces of the eyepiece mounting flange and the focusing lens barrel, and on the contact surfaces of the adjusting ring retainer and the diopter adjusting ring.

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