Anti-extrusion moving frame focusing structure and sighting telescope

Abstract

The utility model provides an anti-extrusion moving frame focusing structure and a sighting telescope, the moving frame focusing structure comprises a translation assembly and a focusing assembly; the translation assembly comprises an outer frame, an inner frame and a first gasket, the outer frame is fixedly connected to the lens body large tube, the inner frame is coaxially installed in the outer frame in a sliding mode, and a focusing lens assembly is installed in the inner frame; the focusing assembly comprises a hand wheel, an eccentric shaft and a connecting rod, the outer wall of the eccentric shaft is connected with the hand wheel, a mounting hole is formed in the eccentric shaft, deviation exists between the axis of the mounting hole and the axis of the eccentric shaft, one end of the connecting rod is mounted in the mounting hole, and the other end of the connecting rod is connected with the outer frame. The gap is formed between the end, away from the focusing assembly, of the outer wall of the outer frame and the inner wall of the large tube of the lens body, and the first gasket is arranged in the gap, so that pressure on the outer support can be buffered and transferred, external pressure cannot be transmitted to the inner frame, movement of the inner frame cannot be affected, and focusing can be effectively carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of optical instruments, in particular to an anti-extrusion movable frame focusing structure and a sighting telescope. Background Art

[0002] When imaging a distant object with an optical system, when I aim the optical system at a nearby object, in order to see the nearby object clearly, I need to adjust the lens to achieve a clear picture, and this process can be understood as focusing. A sighting telescope usually adopts a focusing mechanism, that is, a single or combined lens in front of the image plane is moved back and forth to eliminate the image plane deviation caused by different distances of the target.

[0003] The existing focusing structure is directly matched with the large tube of the lens body. The external bracket will squeeze the large tube of the lens body, and the large tube of the lens body will be unable to move under pressure, resulting in the inability to focus. Summary of the Utility Model

[0004] In view of this, the utility model provides an anti-extrusion movable frame focusing structure and a sighting telescope to solve the technical problem that the external bracket will squeeze the large tube of the lens body in the above background art, and the large tube of the lens body will be unable to move under pressure, resulting in the inability to focus.

[0005] The technical solution of the utility model is realized as follows:

[0006] In the first aspect, the utility model provides an anti-extrusion movable frame focusing structure, which is installed on the large tube of the lens body of a sighting telescope and includes a translation assembly and a focusing assembly, wherein:

[0007] The translation assembly includes an outer frame, an inner frame and a first washer. The outer frame is fixedly connected to the large tube of the lens body. There is a gap between the outer wall of the outer frame away from the focusing assembly and the inner wall of the large tube of the lens body. The first washer is arranged in the gap. The inner frame is coaxially and slidably installed in the outer frame, and a focusing lens assembly is installed in the inner frame;

[0008] The focusing assembly includes a handwheel, an eccentric shaft and a connecting rod. The outer wall of the eccentric shaft is connected to the handwheel. There is an offset between the axis of the installation hole in the eccentric shaft and the axis of the eccentric shaft. One end of the connecting rod is installed in the installation hole, and the other end of the connecting rod is connected to the outer frame.

[0009] On the basis of the above technical solutions, preferably, the focusing assembly further includes a lead screw and a guide sleeve. The guide sleeve is installed in the installation hole, and the lead screw is threadedly connected to the guide sleeve and one end of the connecting rod respectively.

[0010] Based on the above technical solutions, preferably, the focusing lens assembly includes a first negative field lens and a second negative field lens. An installation shaft hole is provided in the inner frame, and the first negative field lens and the second negative field lens are installed in the installation shaft hole;

[0011] The translation assembly further includes a spacer ring and a retaining ring installed in the installation shaft hole. The spacer ring is located between the first negative field lens and the second negative field lens, and the retaining ring presses against one end of the first negative field lens away from the second negative field lens.

[0012] Based on the above technical solutions, preferably, a first shaft section is provided on the outer wall of the outer frame, and a gap is formed between the outer wall of the first shaft section and the inner wall of the large lens tube of the mirror body.

[0013] Based on the above technical solutions, preferably, a guiding groove is provided on the inner wall of the outer frame, and a guiding convex block is provided on the outer wall of the inner frame. The guiding convex block is slidably installed in the guiding groove.

[0014] Based on the above technical solutions, preferably, there are two guiding grooves, and the two guiding grooves are symmetrically arranged. The cross section of the guiding groove is arc-shaped.

[0015] Based on the above technical solutions, preferably, the focusing assembly further includes a focusing seat, and the focusing seat is respectively connected to the hand wheel and the eccentric shaft and is located between the two.

[0016] Based on the above technical solutions, preferably, a first sealing ring is provided between the focusing seat and the hand wheel respectively, and a second sealing ring is provided between the focusing seat and the eccentric shaft.

[0017] Based on the above technical solutions, preferably, a second washer is provided between the bottom of the focusing seat and the large lens tube of the mirror body.

[0018] In a second aspect, the present invention provides a telescopic sight, including a large lens tube of the mirror body, and the movable frame focusing structure described in the first aspect. The large lens tube of the mirror body includes an optical axis section and a focusing hole, the axis of the focusing hole is perpendicular to the optical axis section, the outer frame is fixedly connected to the inner wall of the optical axis section, and the hand wheel is connected to the focusing hole.

[0019] The anti-extrusion movable frame focusing structure of the present invention has the following beneficial effects compared with the prior art:

[0020] (1) It is coaxially and slidably installed in the outer frame through the inner frame. By rotating the handwheel, the connecting rod is driven by the eccentric shaft to move along the axis of the large tube of the mirror body, thereby driving the inner frame to slide relative to the outer frame to achieve focusing. There is a gap between one end of the outer wall of the outer frame away from the focusing assembly and the inner wall of the large tube of the mirror body. The first washer is arranged in the gap, which can buffer and transfer the pressure of the external bracket. The external pressure will not be transmitted to the inner frame, so it will not affect the movement of the inner frame, and focusing can be effectively carried out;

[0021] (2) It is installed in the installation hole through the guide sleeve. The guide screw is respectively threadedly connected to the guide sleeve and one end of the connecting rod. By driving the guide sleeve to rotate through the handwheel, the connecting rod is driven to move along the axis direction of the outer frame through the transmission of the guide screw. When the handwheel rotates 180 degrees, the inner frame moves 2 times the deviation amount, realizing the conversion of the rotation of the handwheel into the linear motion of the connecting rod, thereby achieving focusing;

[0022] (3) It is installed in the installation shaft hole through the first negative field lens and the second negative field lens. The spacer is located between the first negative field lens and the second negative field lens, realizing the positioning of the second negative field lens and isolating the first negative field lens and the second negative field lens at the same time. The retaining ring presses against one end of the first negative field lens away from the second negative field lens, fixing and limiting the first negative field lens, completing the fixing of the distance between the first negative field lens and the second negative field lens, and avoiding the movement of the first negative field lens and the second negative field lens caused by vibration and impact, thereby improving the reliability and stability of the device;

[0023] (4) There is a first shaft section on the outer wall of the outer frame. A gap is formed between the outer wall of the first shaft section and the inner wall of the large tube of the mirror body. The first washer is arranged in the gap, which can buffer and transfer the pressure of the external bracket. The external pressure will not be transmitted to the inner frame, so it will not affect the movement of the inner frame, and focusing can be effectively carried out;

[0024] (5) There is a guide groove on the inner wall of the outer frame, and a guide convex block is arranged on the outer wall of the inner frame. The guide convex block is slidably installed in the guide groove, guiding the sliding of the inner frame in the outer frame, which can ensure the accuracy of focusing and improve the stability and reliability of focusing. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1Isometric view of the anti-extrusion moving frame focusing structure of the present utility model;

[0027] Figure 2 Cross-sectional view of the anti-extrusion moving frame focusing structure of the present utility model;

[0028] Figure 3 Cross-sectional view of the sighting scope of the present utility model;

[0029] Figure 4 Cross-sectional view of the outer frame of the present utility model;

[0030] Figure 5 Cross-sectional view of the inner frame of the present utility model;

[0031] Figure 6 Cross-sectional view of the eccentric shaft of the present utility model.

[0032] Explanation of reference numerals: 1 - translation assembly, 2 - focusing assembly;

[0033] 100 - large tube of the mirror body, 101 - optical axis section, 102 - focusing hole;

[0034] 11 - outer frame, 111 - first shaft section, 112 - outer frame body, 113 - guiding groove, 12 - inner frame, 121 - mounting shaft hole, 122 - guiding protrusion, 13 - first washer, 14 - first negative field lens, 15 - second negative field lens, 16 - spacer ring, 17 - retaining ring;

[0035] 21 - handwheel, 22 - eccentric shaft, 221 - mounting hole, 23 - connecting rod, 24 - lead screw, 25 - guide sleeve, 26 - focusing base, 27 - first sealing ring, 28 - second sealing ring, 29 - second washer. Detailed implementation manners

[0036] Next, in combination with the implementation manners of the present utility model, the technical solutions in the implementation manners of the present utility model will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present utility model, rather than all of the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] Refer to Figures 1-6 As shown, in the first aspect embodiment of the present utility model, an anti-extrusion moving frame focusing structure is proposed, which is installed on the large tube 100 of the mirror body of the sighting scope and includes a translation assembly 1 and a focusing assembly 2, wherein:

[0038] The translation component 1 includes an outer frame 11, an inner frame 12 and a first washer 13. The outer frame 11 is fixedly connected to the large mirror body tube 100 by screws. There is a gap between the outer wall of the outer frame 11, at the end away from the focusing component 2, and the inner wall of the large mirror body tube 100. The first washer 13 is arranged in the gap. The inner frame 12 is coaxially and slidably installed inside the outer frame 11, and a focusing mirror component is installed in the inner frame 12.

[0039] The focusing component 2 includes a handwheel 21, an eccentric shaft 22 and a connecting rod 23. The outer wall of the eccentric shaft 22 is connected to the handwheel 21. There is an installation hole 221 inside the eccentric shaft 22, and there is an offset between the axis of the installation hole 221 and the axis of the eccentric shaft 22. One end of the connecting rod 23 is installed in the installation hole 221, and the other end of the connecting rod 23 is connected to the outer frame 11.

[0040] For the anti-extrusion moving frame focusing structure proposed in this embodiment, by coaxially and slidably installing the inner frame 12 inside the outer frame 11, rotating the handwheel 21, the connecting rod 23 is driven by the eccentric shaft 22 to move along the axis of the large mirror body tube 100, thereby driving the inner frame 12 to slide relative to the outer frame 11 to achieve focusing. Since there is a gap between the outer wall of the outer frame 11, at the end away from the focusing component 2, and the inner wall of the large mirror body tube 100, and the first washer 13 is arranged in the gap, the pressure from the external bracket can be buffered and transferred, and the external pressure will not be transmitted to the inner frame 12, thus not affecting the movement of the inner frame 12, and focusing can be effectively carried out.

[0041] In some embodiments, the focusing component 2 further includes a lead screw 24 and a guide sleeve 25. The guide sleeve 25 is installed in the installation hole 221, and the lead screw 24 is threadedly connected to the guide sleeve 25 and one end of the connecting rod 23 respectively. By installing the guide sleeve 25 in the installation hole 221 and threadedly connecting the lead screw 24 to the guide sleeve 25 and one end of the connecting rod 23 respectively, rotating the guide sleeve 25 by the handwheel 21 causes the connecting rod 23 to move along the axis direction of the outer frame 11 through the transmission of the lead screw 24. Every time the handwheel 21 rotates 180 degrees, the inner frame 12 moves 2 times the offset (for example, when the offset is taken as 0.85 mm, rotating the handwheel 21 by 180 degrees can drive the inner frame 12 to move 1.7 mm), realizing the conversion of the rotation of the handwheel 21 into the linear motion of the connecting rod 23, thereby achieving focusing.

[0042] In some embodiments, the focusing lens assembly includes a first negative field lens 14 and a second negative field lens 15. An installation shaft hole 121 is provided in the inner frame 12, and the first negative field lens 14 and the second negative field lens 15 are installed in the installation shaft hole 121. The translation assembly 1 further includes a spacer 16 and a retaining ring 17 installed in the installation shaft hole 121. The spacer 16 is located between the first negative field lens 14 and the second negative field lens 15, and the retaining ring 17 presses against one end of the first negative field lens 14 away from the second negative field lens 15. By installing the first negative field lens 14 and the second negative field lens 15 in the installation shaft hole 121 and positioning the spacer 16 between the first negative field lens 14 and the second negative field lens 15, while achieving the positioning of the second negative field lens 15, the isolation between the first negative field lens 14 and the second negative field lens 15 is realized. The retaining ring 17 presses against one end of the first negative field lens 14 away from the second negative field lens 15 to fix and limit the first negative field lens 14, complete the fixation of the distance between the first negative field lens 14 and the second negative field lens 15, and avoid the movement of the first negative field lens 14 and the second negative field lens 15 caused by vibration and impact, thereby improving the reliability and stability of the device.

[0043] In some embodiments, the outer frame 11 includes an outer frame body 112 and a first shaft section 111. The outer wall of the outer frame 11 is provided with the first shaft section 111. The first shaft section 111 is located at one end of the outer wall of the outer frame 11 away from the focusing assembly 2, and the outer diameter of the first shaft section 111 is smaller than the outer diameter of the outer frame body 112. A gap is formed between the outer wall of the first shaft section 111 and the inner wall of the lens body large tube 100. By providing the first shaft section 111 on the outer wall of the outer frame 11 and forming the gap between the outer wall of the first shaft section 111 and the inner wall of the lens body large tube 100, and the first washer 13 is arranged in the gap, the pressure of the external bracket can be buffered and transferred, and the external pressure will not be transmitted to the inner frame 12, so that the movement of the inner frame 12 will not be affected, and accurate focusing can be effectively carried out.

[0044] In some embodiments, the inner wall of the outer frame 11 is provided with a guiding groove 113, and the outer wall of the inner frame 12 is provided with a guiding convex block 122. The guiding convex block 122 is slidably installed in the guiding groove 113. By providing the guiding groove 113 on the inner wall of the outer frame 11, the guiding convex block 122 on the outer wall of the inner frame 12, and slidably installing the guiding convex block 122 in the guiding groove 113, the sliding of the inner frame 12 in the outer frame 11 can be guided, which can ensure the focusing accuracy and improve the stability and reliability of focusing.

[0045] In some embodiments, there are two guiding grooves 113, and the two guiding grooves 113 are symmetrically arranged. The cross-section of the guiding groove 113 is arc-shaped. By symmetrically arranging the two guiding grooves 113, the shearing force of the guiding bump 122 in the guiding groove 113 can be effectively offset, avoiding excessive shearing force on the outer frame 11 and causing damage, and improving the service life; the cross-section of the guiding groove 113 is arc-shaped, compared with a square groove, the depth of the guiding groove 113 can be set relatively deep, improving the reliability.

[0046] In some embodiments, the focusing assembly 2 further includes a focusing base 26, and the focusing base 26 is respectively connected to the handwheel 21 and the eccentric shaft 22 and is located between the two. The focusing base 26 is connected to the handwheel 21 by interference fit, and the focusing base 26 and the eccentric shaft 22 are connected by a focusing screw.

[0047] In some embodiments, a first sealing ring 27 is arranged between the focusing base 26 and the handwheel 21, and a second sealing ring 28 is arranged between the focusing base 26 and the eccentric shaft 22. By arranging the first sealing ring 27 and the second sealing ring 28, it can be avoided that water and dust enter the inner frame 12 from the focusing assembly 2 and contaminate the focusing lens assembly, improving the reliability and stability of the device.

[0048] In some embodiments, a second washer 29 is arranged between the bottom of the focusing base 26 and the large lens tube 100. By arranging the second washer 29, the friction between the focusing base 26 and the large lens tube 100 can be buffered, avoiding wear on the large lens tube 100 and improving the service life of the device.

[0049] The working principle of the anti-extrusion moving frame focusing structure is as follows: Rotating the handwheel 21 drives the eccentric shaft 22 and the guide sleeve 25 to rotate, so that the connecting rod 23 moves along the axis direction of the outer frame 11 through the transmission of the lead screw 24, thereby driving the inner frame 12 to slide relative to the outer frame 11 to achieve focusing. For every 180-degree rotation of the handwheel 21, the inner frame 12 moves by 2 times the deviation amount; there is a gap between the end of the outer wall of the outer frame 11 away from the focusing assembly 2 and the inner wall of the large lens tube 100, and the first washer 13 is arranged in the gap, which can buffer and transfer the pressure of the external bracket, and the external pressure will not be transmitted to the inner frame 12, so that the movement of the inner frame 12 will not be affected, and focusing can be effectively carried out.

[0050] In the second aspect of the embodiments of the present utility model, a telescopic sight is provided, which includes a large mirror tube 100 and the moving frame focusing structure described in the first aspect. The large mirror tube 100 includes an optical axis section 101 and a focusing hole 102. The axis of the focusing hole 102 is perpendicular to the optical axis section 101. The outer frame 11 is fixedly connected to the inner wall of the optical axis section 101, and the handwheel 21 is connected to the focusing hole 102.

[0051] In the telescopic sight proposed in this embodiment, a gap is provided between one end of the outer wall of the outer frame 11 away from the focusing assembly 2 and the inner wall of the large mirror tube 100. The first washer 13 is arranged in the gap, which can buffer and transfer the pressure of the external bracket, and the external pressure will not be transmitted to the inner frame 12, so that the movement of the inner frame 12 will not be affected, and focusing can be effectively carried out.

[0052] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mobile frame focusing structure against extrusion, which is installed on the large tube of the mirror body of a sighting telescope, is characterized in that, It includes a translation component and a focusing component, where: The translation component includes an outer frame, an inner frame and a first washer. The outer frame is fixedly connected to the large tube of the lens body. There is a gap between the outer wall of the outer frame, at the end away from the focusing component, and the inner wall of the large tube of the lens body. The first washer is arranged in the gap. The inner frame is coaxially and slidably installed in the outer frame, and a focusing lens component is installed in the inner frame; The focusing component includes a handwheel, an eccentric shaft and a connecting rod. The outer wall of the eccentric shaft is connected to the handwheel. There is an installation hole in the eccentric shaft, and there is an offset between the axis of the installation hole and the axis of the eccentric shaft. One end of the connecting rod is installed in the installation hole, and the other end of the connecting rod is connected to the outer frame.

2. The anti-extrusion movable frame focusing structure according to claim 1, wherein, The focusing component further includes a lead screw and a guide sleeve. The guide sleeve is installed in the installation hole, and the lead screw is threadedly connected to the guide sleeve and one end of the connecting rod respectively.

3. The anti-extrusion movable frame focusing structure according to claim 2, characterized in that, The focusing lens component includes a first negative field lens and a second negative field lens. There is an installation shaft hole in the inner frame, and the first negative field lens and the second negative field lens are installed in the installation shaft hole; The translation component further includes a spacer and a retaining ring installed in the installation shaft hole. The spacer is located between the first negative field lens and the second negative field lens, and the retaining ring presses against one end of the first negative field lens away from the second negative field lens.

4. The anti-extrusion movable frame focusing structure according to claim 1, characterized in that, The outer wall of the outer frame is provided with a first shaft section, and the gap is formed between the outer wall of the first shaft section and the inner wall of the large tube of the lens body.

5. The anti-extrusion movable frame focusing structure according to claim 1, wherein The inner wall of the outer frame is provided with a guide groove, and the outer wall of the inner frame is provided with a guide protrusion. The guide protrusion is slidably installed in the guide groove.

6. The anti-extrusion movable frame focusing structure according to claim 5, characterized in that, There are two guide grooves, and the two guide grooves are symmetrically arranged. The cross section of the guide groove is arc-shaped.

7. The anti-extrusion movable frame focusing structure according to claim 1, wherein, The focusing component further includes a focusing seat, and the focusing seat is connected to the handwheel and the eccentric shaft respectively and is located between the two.

8. The anti-extrusion movable frame focusing structure according to claim 7, wherein A first sealing ring is arranged between the focusing seat and the handwheel respectively, and a second sealing ring is arranged between the focusing seat and the eccentric shaft.

9. The anti-extrusion movable frame focusing structure according to claim 7, wherein, A second washer is arranged between the bottom of the focusing seat and the large tube of the lens body.

10. A telescopic sight, characterized in that, It includes the large tube of the lens body and the moving frame focusing structure according to any one of claims 1-9. The large tube of the lens body includes an optical axis section and a focusing hole. The axis of the focusing hole is perpendicular to the optical axis section. The outer frame is fixedly connected to the inner wall of the optical axis section, and the handwheel is connected to the focusing hole.

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