Sighting telescope precise positioning and parallax-free side focusing device
By designing an accurate side focus device in the scope, using the cooperation of spring two and curved grooves, the problem of unstable parallax adjustment of the traditional scope is solved, and higher shooting accuracy and stability are achieved.
Patent Information
- Application Number
- CN202421931424.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The parallax adjustment of traditional scopes is due to inconsistent quality of spare parts and long-term adjustments, resulting in fitting gaps, affecting the observation target and shooting accuracy.
A side focus device for precise positioning of scope without parallax is designed. Through the cooperation of spring two and side focus mechanism, the stability and accuracy of the side focus process are improved. The device includes a side focus mechanism, a third objective lens and a spring. The side focus mechanism is composed of a cam, a handwheel, a shaft and a bearing, and precise focus is achieved through the cooperation of the curve groove and the positioning groove.
Through the cam structure design and the elastic action of spring two, we ensure that the bearing always comes into contact with the curved lines in the curve trough, ensure the stability and accuracy of the side focus mechanism, and improve the shooting accuracy of the scope.
Smart Images
Figure CN222849897U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sights, and in particular relates to a side focusing device for a sight with accurate positioning and no parallax. Background Art
[0002] The main function of a sight is to use an optical lens to form an image, overlapping the target image and the aiming line on the same focal plane. Even if the eye is slightly offset, it will not affect the aiming point.
[0003] The side focusing structure of the sight is mainly used to change the combined focal length of the entire objective lens group by axially moving the third objective lens on the sight so as to achieve the purpose of accurately observing targets at different distances.
[0004] The parallax adjustment of traditional scopes is caused by the inconsistency of the quality of spare parts and the surface wear of parts caused by long-term adjustment. The resulting fit gap will lead to a large deviation in the positive and negative adjustments, which will affect the observation of the target and have a great impact on shooting accuracy. Utility Model Content
[0005] In view of the above problems in the prior art, the purpose of the utility model is to provide a side focusing device for a sight with precise positioning and no parallax, and to improve the stability and accuracy of the side focusing process through the cooperation of spring 2 and the side focusing mechanism.
[0006] A side focusing device for a sighting scope with precise positioning and no parallax, comprising a side focusing mechanism and a third objective lens connected to a focusing lens frame, the side focusing mechanism comprising a cam, a hand wheel, a shaft and a bearing, the cam comprising a positioning part and a driving part, the positioning part being provided with a positioning groove, the driving part being provided with a curved groove, one end of the bearing being located in the curved groove, the other end being connected to the shaft, and the other end of the shaft being connected to the focusing lens frame;
[0007] The hand wheel drives the cam to rotate, and the drive shaft moves by changing the radius of the curved groove, thereby driving the third objective lens on the focusing lens frame to move back and forth along the axis direction of the lens body;
[0008] A second spring is disposed inside the mirror body, and the second spring is used to ensure that the bearing is always in contact with the inner curve of the curved groove.
[0009] Preferably, the third objective lens is connected to the focusing lens frame via a first pressing ring, and the first pressing ring includes a mounting portion for sleeve-fitting the third objective lens and a clamping portion for clamping the focusing lens frame.
[0010] Preferably, a spring 2 is sleeved on the pressure ring 1, one end of the spring 2 abuts against the outer shoulder of the clamping portion of the pressure ring 1, and the other end abuts against the retaining ring, and the retaining ring is connected to the mirror body.
[0011] Preferably, the side focusing mechanism further comprises a side adjusting base, and the side adjusting base is provided with a cavity for assembling a spring 1 and a positioning bead, the spring 1 abuts against the cam via the positioning bead, and the positioning bead is engaged with the positioning groove.
[0012] Preferably, at least one positioning groove is provided, and one positioning groove corresponds to a scale value on the hand wheel. When focusing is performed, the hand wheel drives the cam to rotate, so that the positioning bead falls into the positioning groove at the corresponding position.
[0013] Preferably, the cam is installed inside the side adjustment base, a corrugated washer is arranged between the side adjustment base and the cam, and a second pressure ring is also installed on the side adjustment base.
[0014] Preferably, the hand wheel is sleeved on the side adjustment base, and an O-ring is arranged between the side adjustment base and the hand wheel.
[0015] Preferably, the handwheel is provided with internal teeth, and the cam is provided with external teeth, and the handwheel and the cam realize transmission through the meshing of the internal teeth and the external teeth, and the cam is also connected with a handwheel cover.
[0016] Preferably, the retaining ring, the first pressure ring, the second spring, the third objective lens and the focusing lens frame are located inside the lens body, and the side focusing mechanism is installed on the side wall of the lens body.
[0017] The beneficial effects of the utility model are as follows: the side focusing device of the sighting scope is accurately positioned and has no parallax. Through the structural design of the cam, when the hand wheel drives the cam to rotate, the drive shaft can move along the inner curve of the curved groove to drive the focusing frame to move, thereby driving the third objective lens to move, thereby realizing the adjustment of the combined focal length of the objective lens group; at the same time, through the elastic effect of the second spring, the bearing can always be in close contact with the inner curve of the curved groove, thereby ensuring the stability and accuracy of the side focusing mechanism when focusing.
[0018] In addition, by coordinating the positioning beads and multiple positioning grooves and making the positioning grooves correspond to the scale values on the handwheel, it is helpful to improve the user's focusing experience and shooting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0020] Figure 1 It is a structural schematic diagram of the utility model;
[0021] Figure 2 It is a structural schematic diagram of the cam of the utility model;
[0022] Figure 3 This is a schematic diagram of the structure of the utility model Figure 1 Sectional view of the middle DD axis;
[0023] Figure 4 This is a schematic diagram of the structure of the utility model Figure 1 Sectional view along the EE axis.
[0024] The markings in the figure are: 1. Lens body; 2. Retaining ring; 3. Spring 2; 4. Pressing ring 1; 5. Third objective lens; 6. Focusing frame; 7. Shaft; 8. Bearing; 9. Side adjustment base; 11. Spring 1; 12. Positioning bead; 13. Corrugated washer; 14. Pressing ring 2; 15. O-ring; 16. Cam; 1601. Positioning groove; 1602. Curved groove; 17. Handwheel cover; 18. Handwheel. DETAILED DESCRIPTION
[0025] Embodiment 1
[0026] like Figure 1 As shown, a side focusing device for precise positioning of a sight and without parallax includes a side focusing mechanism and a third objective lens 5 connected to a focusing frame 6. Specifically, the third objective lens 5 is connected to the focusing frame 6 via a pressing ring 4. The pressing ring 4 includes a mounting portion for sleeved the third objective lens 5 and a clamping portion for clamping the focusing frame 6.
[0027] In addition, a spring 2 3 is sleeved on the pressure ring 1 4, one end of the spring 2 3 abuts against the outer shoulder of the clamping portion of the pressure ring 1 4, and the other end abuts against the retaining ring 2, and the retaining ring 2 is connected to the mirror body 1. The spring 2 3 is used to ensure that the bearing 8 is always in contact with the inner curve of the curved groove 1602.
[0028] The side focusing mechanism includes a cam 16, a hand wheel 18, a shaft 7 and a bearing 8. Figure 2 As shown, the cam 16 includes a positioning part and a driving part. The positioning part is provided with a positioning groove 1601 for focusing and positioning. The driving part is provided with a curved groove 1602. The radius of the inner curve in the curved groove 1602 is set according to the focusing accuracy. The change of the inner curve radius is adapted to the distance required to move the third objective lens 5 when focusing. Figure 3 As shown, one end of the bearing 8 is located in the curved groove 1602 , and the other end is connected to the shaft 7 , and the other end of the shaft 7 is connected to the focusing lens frame 6 .
[0029] Specifically, the hand wheel 18 is provided with internal teeth, and the cam 16 is provided with external teeth. The hand wheel 18 and the cam 16 realize transmission through the meshing of the internal teeth and the external teeth. The cam 16 is also connected with a hand wheel cover 17 .
[0030] Through the transmission cooperation between the inner teeth and the outer teeth, the hand wheel 18 drives the cam 16 to rotate, and the radius change of the curved groove 1602 drives the shaft 7 to move, thereby driving the third objective lens 5 on the focusing lens frame 6 to move back and forth along the axis direction of the lens body 1. At the same time, by utilizing the elastic effect of the spring 23, whether the hand wheel 18 rotates counterclockwise or clockwise, the bearing 8 always moves closely to the inner curve of the curved groove 1602 on the cam 16, thereby ensuring that the hand wheel 18 can push the third objective lens 5 to move forward and backward without gap, avoiding the influence of shooting accuracy due to the accumulated error of the internal structure during focusing.
[0031] Further, such as Figure 1 As shown, the side focusing mechanism also includes a side adjusting base 9, a cam 16 is installed inside the side adjusting base 9, and a wave washer 13 is arranged between the side adjusting base 9 and the cam 16. The wave washer 13 is used to apply axial pressure when compressed to generate a spring-like force to absorb and distribute the load. A second pressing ring 14 is also installed on the side adjusting base 9. The second pressing ring 14 is used to control the up and down movement of the cam 16 to improve stability. The hand wheel 18 is sleeved on the side adjusting base 9, and an O-ring 15 is arranged between the side adjusting base 9 and the hand wheel 18.
[0032] like Figure 1 , Figure 4 As shown, the side adjustment base 9 is provided with a cavity for assembling a spring 11 and a positioning bead 12. The spring 11 abuts against the cam 16 through the positioning bead 12, and the positioning bead 12 is engaged with the positioning groove 1601. Specifically, at least one positioning groove 1601 is provided, and one positioning groove 1601 corresponds to a scale value on the hand wheel 18. When focusing, the hand wheel 18 drives the cam 16 to rotate, so that the positioning bead 12 falls into the positioning groove 1601 at the corresponding position. The outer wall of the lens body 1 is provided with a marking point. The hand wheel 18 is rotated to make the positioning groove 1601 engage with the positioning bead 12. The scale value on the hand wheel 18 is determined by the marking point, thereby determining the focal length.
[0033] The retaining ring 2, the pressure ring 1 4, the spring 2 3, the third objective lens 5 and the focusing frame 6 are located inside the lens body 1, and the side focusing mechanism is installed on the side wall of the lens body 1 to form a sighting lens structure.
[0034] The assembly process of the side focusing device with precise positioning and no parallax of the sight is as follows:
[0035] First, tighten the external thread of the retaining ring 2 with the internal thread of the lens body 1, then put the spring 2 3 into the lens body 1, and then put the third objective lens 5 into the inside of the pressing ring 1 4, and then connect the pressing ring 1 4 with the focusing frame 6, and put the assembled pressing ring 1 4, the third objective lens 5, and the focusing frame 6 into the lens body 1 as a whole, and make the outer shoulder of the clamping part of the pressing ring 1 4 engage with the spring 2 3. At this time, the two ends of the spring 2 3 are respectively in contact with the retaining ring 2 and the pressing ring 1 4.
[0036] The side adjustment base 9 is fixed to the side wall of the lens body 1, the shaft 7 is interference connected with the bearing 8, and the external thread at one end of the shaft 7 is connected with the internal thread of the focusing frame 6, and a spring 11 and a positioning bead 12 are placed in the cavity of the side adjustment base 9 in sequence.
[0037] Then put the cam 16 into the side adjustment base 19, and make one end of the bearing 8 be located in the curved groove 1602 of the cam 16, and the positioning groove 1601 of the cam 16 is engaged with the positioning bead 12. Put the wave washer 13 between the side adjustment base 9 and the cam 16, thread the pressure ring 14 with the side adjustment base 9, put the O-ring 15 into the installation groove of the outer wall of the side adjustment base 9, and then mesh the handwheel 18 with the cam 16, and finally thread the handwheel cover 17 with the cam 16.
[0038] Working principle: The sight has a precise positioning and parallax-free side focusing device. When in use, the cam 16 is driven to rotate by rotating the hand wheel 18. During the rotation process, the positioning beads 12 fall into different positioning grooves 1601 on the cam 16. The scale value on the hand wheel 18 is determined by the marking point on the lens body 1, thereby determining the focusing distance. During rotation, the curved groove 1602 of the cam 16 will push the shaft 7 to move along the inner curve radius of the curved groove 1602, so that the shaft 7 drives the focusing frame 6 and the third objective lens 5 to move forward and backward in the axial direction of the lens body 1, thereby adjusting the position of the third objective lens 5.
[0039] Due to the elastic force of spring 23, no matter the hand wheel 18 rotates counterclockwise or clockwise, the bearing 8 always moves closely to the inner curve of the curved groove 1602 on the cam 16, thereby ensuring that the hand wheel 18 can push the third objective lens 5 to move back and forth without gap, avoiding the influence of shooting accuracy due to the accumulated errors of the internal structure when focusing.
[0040] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A side focusing device for a sighting scope with accurate positioning and no parallax, comprising a side focusing mechanism and a third objective lens (5) connected to a focusing lens frame (6), characterized in that: The side focusing mechanism comprises a cam (16), a hand wheel (18), a shaft (7) and a bearing (8); the cam (16) comprises a positioning portion and a driving portion; the positioning portion is provided with a positioning groove (1601); the driving portion is provided with a curved groove (1602); one end of the bearing (8) is located in the curved groove (1602); the other end is connected to the shaft (7); and the other end of the shaft (7) is connected to the focusing lens frame (6); The hand wheel (18) drives the cam (16) to rotate, and the drive shaft (7) moves by changing the radius of the curved groove (1602), thereby driving the third objective lens (5) on the focusing lens frame (6) to move back and forth along the axis direction of the lens body (1); A second spring (3) is disposed inside the mirror body (1), and the second spring (3) is used to ensure that the bearing (8) is always in contact with the inner curve of the curved groove (1602).
2. The sighting scope precise positioning and parallax-free side focusing device according to claim 1, characterized in that: The third objective lens (5) is connected to the focusing lens frame (6) via a pressure ring (4); the pressure ring (4) comprises a mounting portion for sleeve-fitting the third objective lens (5) and a clamping portion for clamping the focusing lens frame (6).
3. The sighting scope precise positioning and parallax-free side focusing device according to claim 2, characterized in that: The pressure ring 1 (4) is also sleeved with a spring 2 (3), one end of the spring 2 (3) abuts against the outer shoulder of the clamping portion of the pressure ring 1 (4), and the other end abuts against the retaining ring (2), and the retaining ring (2) is connected to the mirror body (1).
4. The sighting scope precise positioning and parallax-free side focusing device according to claim 1, characterized in that: The side focusing mechanism also includes a side adjusting base (9), and the side adjusting base (9) is provided with a cavity for assembling a spring (11) and a positioning bead (12), the spring (11) abuts against the cam (16) through the positioning bead (12), and the positioning bead (12) is engaged with the positioning groove (1601).
5. The sighting scope precise positioning and parallax-free side focusing device according to claim 4, characterized in that: At least one positioning groove (1601) is provided, and one positioning groove (1601) corresponds to a scale value on the hand wheel (18). When focusing is performed, the hand wheel (18) drives the cam (16) to rotate, so that the positioning bead (12) falls into the positioning groove (1601) at the corresponding position.
6. The sighting scope precise positioning and parallax-free side focusing device according to claim 1 or 4, characterized in that: The cam (16) is installed inside the side adjustment base (9), a wave washer (13) is arranged between the side adjustment base (9) and the cam (16), and a second pressure ring (14) is also installed on the side adjustment base (9).
7. The sighting scope precise positioning and parallax-free side focusing device according to claim 1 or 4, characterized in that: The hand wheel (18) is sleeved on the side adjustment base (9), and an O-ring (15) is arranged between the side adjustment base (9) and the hand wheel (18).
8. The sighting scope precise positioning and parallax-free side focusing device according to claim 1, characterized in that: The hand wheel (18) is provided with internal teeth, and the cam (16) is provided with external teeth. The hand wheel (18) and the cam (16) realize transmission through the meshing of the internal teeth and the external teeth. The cam (16) is also connected with a hand wheel cover (17).
9. The sighting scope precise positioning and parallax-free side focusing device according to claim 1, characterized in that: The retaining ring (2), the first pressing ring (4), the second spring (3), the third objective lens (5) and the focusing lens frame (6) are located inside the lens body (1), and the side focusing mechanism is installed on the side wall of the lens body (1).