Anti-offset handheld cross cylindrical mirror

Abstract

The utility model relates to the technical field of optometry equipment, in particular to an anti-offset handheld cross cylindrical lens, which aims to solve the technical problem that a cross cylindrical lens in the prior art is easy to offset during use, and specifically comprises a lens, a lens frame for fixing the lens and a handle connected outside the lens frame, the glasses frame comprises an inner frame and an outer frame which are coaxially arranged, the inner frame is rotatably mounted on the inner side of the outer frame, the lenses are fixedly mounted on the inner edge of the inner frame, the outer edge of the inner frame is provided with a deflector rod for adjusting the rotation angle of the lenses, and the outer frame is correspondingly provided with an accommodating groove for the deflector rod to extend out; according to the utility model, through the controllable rotation of the inner frame in the outer frame, the overturning operation of the lens does not need to be moved away from the front of the eyes of a testee, so that the problem that the center of the lens and the axial position of the lens deviate due to insufficient hand stability is greatly reduced, and the stability and the accuracy of optometry are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of optometry equipment, in particular to an anti-offset handheld cross cylinder lens. Background Art

[0002] A cross cylinder lens (abbreviation: "cylinder lens") is an optical instrument composed of two cylindrical lenses with equal degrees, opposite signs, and perpendicular axes overlapped and ground together, and is commonly used for astigmatism examination, especially for accurate examination of the astigmatism axis and degree. Currently, the handheld cross cylinder lenses circulating on the market generally adopt a fixed design, and its basic structure is as Figure 1 shown, including a circular lens, a frame fixed on the periphery of the lens, and a handle fixed outside the frame. When in use, one side of the lens is placed in front of the person being tested, and then, while keeping the center position of the lens and the axis position of the handle unchanged, the lens is flipped to the other side by rotating the handle, so that the positive and negative axis positions of the lens are interchanged. The person being tested is guided to compare the clarity differences between the two sides, and the rotation angle of the handle axis relative to the center of the lens is adjusted according to the clarity differences until the above differences disappear. At this time, the handle axis represents the astigmatism axis of the person being tested.

[0003] However, in actual operation, when flipping the lens, it is usually necessary to move the lens away from in front of the person being tested, and then re-approach it after flipping. Due to the limited stability of the human hand, the positioning of the lens center and the handle axis in front of the person being tested often shifts before and after flipping, which not only affects the accuracy of optometry but also reduces the efficiency of optometry, bringing inconvenience to clinical ophthalmic examinations. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an anti-offset handheld cross cylinder lens that does not need to be flipped, which can effectively improve the accuracy and efficiency of optometry in view of the deficiencies of the prior art.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions:

[0006] An anti-offset handheld cross cylinder lens, including a lens, a frame for fixing the lens, and a handle connected to the outside of the frame. The lens 1 has a positive axis position and a negative axis position that are perpendicular to each other. The characteristics are:

[0007] The frame includes an inner frame and an outer frame arranged coaxially. The inner frame is rotatably installed inside the outer frame. The lens is fixedly installed on the inner edge of the inner frame. A lever for adjusting the rotation angle of the lens is provided on the outer edge of the inner frame, and a receiving groove for the lever to extend out is correspondingly opened on the outer frame;

[0008] A columnar connector head is fixedly provided at the rear end of the outer frame. The front end of the handle is detachably and fixedly connected to the connector head. A through hole leading to the inner frame is axially provided at the end of the connector head. A first positioning member is arranged in the through hole, and a second positioning member is arranged on the inner frame. When the dial rod drives the inner frame to rotate by 1 / 4 turn to interchange the positive axis position and the negative axis position of the lens, the first positioning member can cooperate with the second positioning member to limit the further rotation of the inner frame relative to the outer frame.

[0009] The technical problem to be solved by the present utility model can be further realized by the following steps. The first positioning member is a steel ball, and the second positioning member is a hemispherical groove. An elastic mechanism for pressing the steel ball forward against the inner frame is arranged in the through hole of the connector head. When the groove rotates to the position of the steel ball along with the inner frame, the steel ball is embedded in the groove under the tension of the elastic mechanism to limit the further rotation of the inner frame relative to the outer frame.

[0010] The technical problem to be solved by the present utility model can be further realized by the following steps. At least two grooves are provided, and the included angle between the connecting lines of adjacent grooves and the rotation center of the inner frame is 45° or 90°.

[0011] The technical problem to be solved by the present utility model can be further realized by the following steps. The steel ball is arranged at the front part of the through hole of the connector head. The elastic mechanism includes a set screw embedded in the rear part of the through hole, and a compression spring is arranged axially between the set screw and the steel ball.

[0012] The technical problem to be solved by the present utility model can be further realized by the following steps. The included angle between the two ends of the accommodating groove and the rotation center of the inner frame is 90° or 135°.

[0013] The technical problem to be solved by the present utility model can be further realized by the following steps. A first limiting member is arranged on the outer edge of the inner frame, and a second limiting member is correspondingly arranged on the inner edge of the outer frame. The first limiting member can cooperate with the second limiting member to limit the maximum rotation range of the inner frame.

[0014] The technical problem to be solved by the present utility model can be further realized by the following steps. The first limiting member is a limiting post, and the second limiting member is a limiting groove. The limiting post is movably arranged in the limiting groove to limit the maximum rotation range of the inner frame.

[0015] The technical problem to be solved by the present utility model can be further realized by the following steps. The included angle between the two ends of the limiting groove and the rotation center of the inner frame is 90° or 135°.

[0016] The technical problem to be solved by the present utility model can be further realized through the following steps. A connecting sleeve is provided at the front end of the handle, and the end of the connecting head is inserted into the connecting sleeve. The connecting sleeve and the connecting head are fixedly connected by threads.

[0017] The technical problem to be solved by the present utility model can be further realized through the following steps. An insertion head is provided at the front end of the handle, the end of the insertion head is inserted into the through hole of the connecting head, the steel ball is arranged at the front part of the through hole of the connecting head, and the elastic mechanism includes a compression spring arranged axially along the through hole between the insertion head and the steel ball.

[0018] Compared with the prior art, through the controllable rotation of the inner frame inside the outer frame, the present utility model enables the flipping operation of the lens without being removed from in front of the tested person's eyes, greatly reducing the problem of the deviation of the lens center and the handle axis position caused by insufficient hand stability, thereby ensuring the stability and accuracy of optometry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an existing handheld cross cylinder lens;

[0020] Figure 2 is an exploded schematic view of the present utility model;

[0021] Figure 3 is a top view schematic diagram of Embodiment 1 of the present utility model;

[0022] Figure 4 is a top view cross-sectional view of Embodiment 1 of the present utility model;

[0023] Figure 5 is a top view cross-sectional view of Embodiment 1 of the present utility model after the axis position is adjusted;

[0024] Figure 6 is a top view schematic diagram of Embodiment 2 of the present utility model;

[0025] Figure 7 is a top view cross-sectional view of Embodiment 2 of the present utility model;

[0026] Figure 8 is a top view cross-sectional view of Embodiment 2 of the present utility model after the axis position is adjusted;

[0027] Figure 9 is a top view cross-sectional view of another use state of Embodiment 2 of the present utility model;

[0028] Figure 10 is a top view cross-sectional view of another use state of Embodiment 2 of the present utility model after the axis position is adjusted;

[0029] In the figure: 1 - lens; 2 - spectacle frame; 3 - handle; 4 - inner frame; 5 - outer frame; 6 - lever; 7 - receiving groove; 8 - connector; 10 - steel ball; 11 - groove; 12 - setscrew; 13 - compression spring; 14 - limiting post; 15 - limiting groove; 16 - connecting sleeve. Detailed implementation mode

[0030] The following further describes the specific technical solution of the present invention to enable those skilled in the art to further understand the present invention without restricting its rights.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032]

Embodiment 1

[0033] Please refer to Figure 2-5 , an anti-offset hand-held cross cylinder lens, including a lens 1, a spectacle frame 2 for fixing the lens, and a handle 3 connected to the outside of the spectacle frame. The lens 1 has a positive axis position and a negative axis position that are perpendicular to each other.

[0034] The spectacle frame 2 includes an inner frame 4 and an outer frame 5 arranged coaxially. The inner frame 4 is rotatably installed inside the outer frame 5. The lens 1 is fixedly installed on the inner edge of the inner frame 4. A lever 6 for adjusting the rotation angle of the lens is provided on the outer edge of the inner frame 4, and a receiving groove 7 for the lever 6 to extend out is correspondingly opened on the outer frame 5.

[0035] A columnar connector 8 is fixedly provided at the rear end of the outer frame 5. The front end of the handle 3 is detachably and fixedly connected to the connector 8. A through hole leading to the inner frame 4 is axially opened at the end of the connector 8. A first positioning member is provided in the through hole, and a second positioning member is provided on the inner frame 4. When the lever 6 drives the inner frame 4 to rotate 1 / 4 turn to interchange the positive axis position and the negative axis position of the lens 1, the first positioning member can cooperate with the second positioning member to limit the further rotation of the inner frame 4 relative to the outer frame 5.

[0036] The first positioning member and the second positioning member can adopt the form of pin cooperation. For example, the first positioning member is an insertion bolt that can move axially back and forth along the connector 8, and the second positioning member is a positioning hole that cooperates with the insertion bolt. When the inner frame 4 moves to the corresponding position, the insertion bolt can be inserted forward into the positioning hole to achieve the effect of restricting the rotation of the inner frame 4.

[0037] However, when using the above structure, it is still necessary to manually insert and remove the insertion bolt, which is rather cumbersome. To further improve the convenience of use of the present utility model, an elastic locking structure is selected here to achieve the technical effects of automatic locking and unlocking. Specifically:

[0038] The first positioning member is a steel ball 10, and the second positioning member is a hemispherical groove 11. An elastic mechanism for pressing the steel ball 10 forward against the inner frame 4 is provided in the through hole of the connector 8. When the groove 11 rotates with the inner frame 4 to the position of the steel ball 10, the steel ball 10 automatically fits into the groove 11 under the tension of the elastic mechanism, restricting further rotation of the inner frame 4 relative to the outer frame 5. When it is necessary to continue rotating the inner frame 4, just slightly push the lever 6, and the steel ball 10 can be retracted into the through hole of the connector 8 along the groove wall of the groove 11.

[0039] In the above structure, there are two grooves 11, and the included angle between the connecting lines of adjacent grooves 11 and the rotation center of the inner frame 4 is 90°.

[0040] The steel ball is arranged at the front part of the through hole of the connector 8, and the elastic mechanism includes a setscrew 12 embedded in the rear part of the through hole. A compression spring 13 is arranged axially in the through hole between the setscrew 12 and the steel ball.

[0041] To further improve the use stability and prevent measurement errors caused by the user rotating the inner frame 4 excessively, the present utility model also has an additional limiting member for restricting the maximum rotation range of the inner frame 4. Specifically:

[0042] A first limiting member is provided on the outer edge of the inner frame 4, and a second limiting member is correspondingly provided on the inner edge of the outer frame 5. The first limiting member can cooperate with the second limiting member to restrict the maximum rotation range of the inner frame 4.

[0043] In the above structure, the first limiting member can be the lever 6, and the second limiting member can be the receiving groove 7. Among them, the included angle between the connecting lines of the two ends of the receiving groove 7 and the rotation center of the inner frame 4 is 90°. When the first positioning member cooperates with the second positioning member, the lever 6 just abuts against one end of the receiving groove 7, thereby preventing the inner frame 4 from further excessive rotation.

[0044] In the above structure, the first limiting member can also be a separately provided limiting post 14, and the second limiting member is a correspondingly provided limiting groove 15. The limiting post 14 is movably arranged in the limiting groove 15 to restrict the maximum rotation range of the inner frame 4. The included angle between the two ends of the limiting groove 15 and the rotation center of the inner frame 4 is 90°. When the first positioning member cooperates with the second positioning member, the limiting post 14 just abuts against one end of the limiting groove 15, thereby preventing the inner frame 4 from further excessive rotation.

[0045] The handle 3 and the outer frame 5 can be connected in various ways. For example, a connecting sleeve 16 is provided at the front end of the handle 3, the end of the connecting head 8 is inserted into the connecting sleeve 16, and the connecting sleeve 16 and the connecting head 8 are fixedly connected by threads; Another example is that an insertion head is provided at the front end of the handle 3, the end of the insertion head is inserted into the through hole of the connecting head 8, the steel ball is arranged at the front part of the through hole of the connecting head 8, and the elastic mechanism includes a compression spring 13 arranged axially between the insertion head and the steel ball along the through hole.

[0046] Working principle: For an anti-offset handheld cross cylinder lens of the present invention, during use, one side of the lens 1 is placed in front of the eyes of the person to be tested, and then the lever 6 is toggled with a finger to the other end of the receiving groove, so that the positive and negative axis positions of the lens 1 can be interchanged; when the lever 6 is toggled back to the initial end of the receiving groove, the positive and negative axis positions of the lens 1 can be changed back. By continuously repeating the above process, the axis position of the lens 1 can be repeatedly positioned at two positions separated by 90 degrees, and the lens 1 does not need to be removed from in front of the eyes of the person to be tested, greatly reducing the problem of the offset between the center of the lens 1 and the axis position of the handle 3 caused by insufficient hand stability, thereby ensuring the stability and accuracy of optometry.

[0047]

Embodiment 2

[0048] Please refer to Figure 6-10 , Embodiment 2 further improves the structures of the groove 11, the receiving groove 7 and the limiting groove 15 on the basis of Embodiment 1, so that the anti-offset handheld cross cylinder lens of the present invention can perform more precise adjustment of the lens axis position during use. Specifically, in this embodiment, there are four grooves 11, and the included angle between the connecting lines of adjacent grooves 11 and the rotation center of the inner frame 4 is 45°; correspondingly, the included angle between the connecting lines of the two ends of the receiving groove 7 and the rotation center of the inner frame is 135°, and the included angle between the connecting lines of the two ends of the limiting groove 15 and the rotation center of the inner frame is also 135°. In this way, the lens axis position can be adjusted to as shown in Figure 7-8 , and at this time the usage method is the same as that of Embodiment 1; at the same time, the lens axis position can also be adjusted to as shown in Figure 9-10 , at this time the lens axis position coincides with or is perpendicular to the handle axis position, which is more conducive to the user to adjust the holding angle and further improves the usage flexibility of the present invention.

[0049] Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

Claims

1. An anti-deviated handheld cross-cylindrical mirror, comprising a lens, a frame for fixing the lens, and a handle connected to the outside of the frame, wherein the lens has a positive axis position and a negative axis position perpendicular to each other, and is characterized in that: The frame comprises an inner frame and an outer frame which are coaxially arranged, the inner frame is rotatably mounted on the inner side of the outer frame, the lens is fixedly mounted on the inner edge of the inner frame, a lever for adjusting the rotation angle of the lens is provided on the outer edge of the inner frame, and a receiving groove for the lever to extend is correspondingly provided on the outer frame; A columnar connector is fixedly provided at the rear end of the outer frame, and the front end of the handle is detachably fixedly connected to the connector. A through hole leading to the inner frame is axially opened at the end of the connector, and a first positioning component is provided in the through hole. A second positioning component is provided on the inner frame. When the lever drives the inner frame to rotate 1 / 4 of a circle so that the positive axis position and the negative axis position of the lens are interchanged, the first positioning component can cooperate with the second positioning component to limit the further rotation of the inner frame relative to the outer frame.

2. The anti-deviated handheld cross-cylindrical mirror according to claim 1, characterized in that: The first positioning component is a steel ball, and the second positioning component is a hemispherical groove. An elastic mechanism for pressing the steel ball forward onto the inner frame is provided in the through hole of the connector. When the groove rotates with the inner frame to the steel ball, the steel ball is embedded in the groove under the tension of the elastic mechanism, thereby limiting further rotation of the inner frame relative to the outer frame.

3. The anti-deviated handheld cross-cylindrical mirror according to claim 2, characterized in that: There are at least two grooves, and the angle between the lines connecting adjacent grooves and the rotation center of the inner frame is 45° or 90°.

4. The anti-deviated handheld cross-cylindrical mirror according to claim 2 or 3, characterized in that: The steel ball is arranged at the front of the through hole of the connector, and the elastic mechanism comprises a top screw embedded at the rear of the through hole, and a compression spring is arranged between the top screw and the steel ball along the axial direction of the through hole.

5. The anti-deviated handheld cross-cylindrical mirror according to claim 1, characterized in that: The angle between the two ends of the accommodating groove and the rotation center of the inner frame is 90° or 135°.

6. The anti-deviated handheld cross-cylindrical mirror according to claim 1, characterized in that: A first limiting component is disposed on the outer edge of the inner frame, and a second limiting component is correspondingly disposed on the inner edge of the outer frame. The first limiting component can cooperate with the second limiting component to limit the maximum rotation range of the inner frame.

7. The anti-deviated handheld cross-cylindrical mirror according to claim 6, characterized in that: The first limiting component is a limiting column, the second limiting component is a limiting groove, and the limiting column is movably arranged in the limiting groove to limit the maximum rotation range of the inner frame.

8. The anti-deviated handheld cross-cylindrical mirror according to claim 7, characterized in that: The angle between the two ends of the limiting groove and the rotation center of the inner frame is 90° or 135°.

9. The anti-deviated handheld cross-cylindrical mirror according to claim 1, characterized in that: A connecting sleeve is provided at the front end of the handle, the end of the connecting head is inserted into the connecting sleeve, and the connecting sleeve and the connecting head are fixedly connected by threads.

10. The anti-deviating handheld cross-cylindrical mirror according to claim 2, characterized in that: An insertion head is provided at the front end of the handle, the end of the insertion head is inserted into the through hole of the connecting head, the steel ball is arranged in front of the through hole of the connecting head, and the elastic mechanism includes a compression spring arranged between the insertion head and the steel ball along the axial direction of the through hole.

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