CN220632350U - Eye axial marker - Google Patents

Abstract

The application discloses an eye axial marker, which comprises a fixed ring, a rotating ring and a locking part, wherein the rotating ring can coaxially rotate relative to the fixed ring, and the locking part can limit the rotating ring to rotate relative to the fixed ring; the fixed ring and the rotating ring are marked with scale marks, and the minimum scale of the rotating ring and the minimum scale of the fixed ring have preset difference values. The marker can improve the marking accuracy under the condition of limited size.

Description

Eye axial marker

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an eye axial position marker.

Background

Cataract is the blinding eye disease with the highest incidence in the world, and phacoemulsification and artificial lens implantation operation are the main means for treating cataract at present, wherein the artificial lens is an optical lens for replacing turbid lens, the operation needs to use phacoemulsification technology to remove nucleus and cortex of turbid lens, and the lens capsular bag is reserved, and then the artificial lens is implanted in the lens capsular bag. Corneal astigmatism is one of the important factors causing poor postoperative vision of cataract patients, and can obviously influence the visual quality after cataract extraction. Currently, the main methods for correcting astigmatism of cataract patients include postoperative lens wearing, cornea excimer laser surgery, making a main surgical incision or a limbal relief incision on the steep axis of cornea, and using astigmatism correction type intraocular lenses. Among them, astigmatism correction type artificial lens has relatively wide clinical application and definite effect. However, it is important that the correct axial fixation of the astigmatism correcting intraocular lens after implantation is such that rotation of the intraocular lens per 1 ° results in 3.3% under correction of astigmatism and rotation of more than 30 ° results in the introduction of additional astigmatism. In order to ensure the accurate axial position of the astigmatism correction type artificial lens after implantation, it is very important to accurately mark and confirm the horizontal position or the astigmatism axial position of the surgical eye of a patient before and during the operation.

When the astigmatism correction type artificial lens is implanted, in order to avoid the influence caused by the rotation of the eyeball (about 10 degrees of maximum rotation) in the horizontal position, the traditional method is that a doctor manually marks the eye by using a marker pen under a slit lamp microscope when the patient sits down before an operation, the slit lamp of the microscope is firstly adjusted to the horizontal position and modulated narrowest when the eye is marked, a light band passes through the center of a pupil, and the marker pen is used for marking the horizontal position on the limbus. During operation, the marked 0 degree position is referenced, and the annular scattered light disk with scales is used for further determining the scattered light axis position. However, since the diameter of the cornea is only about 10mm, the conventional astigmatism marking disc with the diameter in the operation is difficult to realize accurate scale marking, and generally can only be accurate to 5-10 degrees, and the accuracy of the marking device as shown in patent 201910636100.6 is insufficient, so that larger errors can be brought to the operation.

Disclosure of Invention

It is an object of the present application to provide an ocular axial marker to improve the accuracy of the marking in cases where the marker is limited in size.

The eye axial position marker comprises a fixed ring, a rotating ring and a locking component, wherein the rotating ring can coaxially rotate relative to the fixed ring, and the locking component can limit the rotating ring to rotate relative to the fixed ring; the fixed ring and the rotating ring are marked with scale marks, and the minimum scale of the rotating ring and the minimum scale of the fixed ring have preset difference values.

In a specific embodiment, the predetermined difference between the minimum scale of the rotating ring and the minimum scale of the stationary ring is 1 °.

In a specific embodiment, the rotating ring is provided with two marks symmetrically arranged along the radial direction.

In one embodiment, the device further comprises a limiting component for limiting radial movement of the rotating ring relative to the fixed ring.

In one specific embodiment, the limiting component comprises a plurality of limiting posts distributed along the circumferential direction of the fixed ring, and the limiting posts are abutted against the peripheral wall of the rotating ring.

In a specific embodiment, an inner step part is arranged on the inner side of the fixed ring, the inner step part is the limiting component, the rotating ring is supported on a step surface of the inner step part, and a step side wall of the inner step part abuts against the peripheral wall of the rotating ring;

or, an outer step part is arranged on the outer side of the fixed ring, the outer step part is the limiting part, the rotating ring is supported on the step surface of the outer step part, and the step side wall of the outer step part abuts against the inner peripheral wall of the rotating ring.

In a specific embodiment, the rotating ring is sleeved outside the fixed ring, and the inner peripheral wall of the rotating ring is the limiting component.

In one specific embodiment, part of the edge of the upper part of the rotating ring extends inwards to form an extension plate, the extension plate is marked with scale marks, and the extension plate is positioned above the fixed ring.

In one embodiment, the device further comprises an operation handle, and the fixing ring is fixed to one end of the operation handle.

In one embodiment, the locking component comprises a screw, the operating handle is provided with a threaded hole, the screw and the threaded hole are in threaded fit, and the screw rotates to approach and abut against the rotating ring or move away to loosen the rotating ring; or, the locking component comprises an operating rod and an elastic component, wherein the operating rod is used for abutting against the rotating ring or the fixed ring so as to limit the rotating ring to rotate relative to the fixed ring.

In one embodiment, the elastic member comprises a spring plate and/or a torsion spring.

In one specific embodiment, the locking component comprises a connecting rod component, the connecting rod component comprises a supporting rod and the operating rod, the operating handle or the fixing ring is provided with a hole part, the supporting rod penetrates through the hole part and abuts against the peripheral wall of the rotating ring under the action of the torsion spring, the operating rod is pressed to overcome the elasticity of the torsion spring, and the supporting rod releases the rotating ring; or, the operating lever has a pressing portion, and the elastic member maintains the pressing portion to press against the upper end surface of the rotating ring.

The minimum scale difference between the rotating ring and the fixed ring is used as the adjustment precision, the minimum scales of the fixed ring and the rotating ring do not determine the precision of the eye axial position marker, and the improvement of the eye axial position angle adjustment precision can be realized in a simpler mode without being limited by the marks of the radial sizes of the limited fixed ring and the rotating ring.

Drawings

FIG. 1 is a schematic view of an eye axial marker according to a first embodiment of the present application, not showing a rotating ring;

FIG. 2 is a schematic view of a retaining ring of the ocular axial marker of FIG. 1;

FIG. 3 is a schematic view of a rotating ring of an eye axial marker in a first embodiment of the present application;

FIG. 4 is a top view of the swivel ring of FIG. 3;

FIG. 5 is a schematic view of the first embodiment with the rotating ring and stationary ring of the eye axial marker assembled;

FIG. 6 is a schematic view of the rotating ring of FIG. 5 rotated by a certain angle;

FIG. 7 is a schematic view showing another structure of the rotating ring in the present embodiment;

FIG. 8 is a side view of the position of the stop member of the ocular axial marker of FIG. 1;

FIG. 9 is a schematic view of an ocular axial marker in a second embodiment of the present application;

FIG. 10 is a schematic view of a retaining ring of the ocular axial marker of FIG. 9;

FIG. 11 is a schematic view showing still another structure of the rotating ring in the present embodiment;

FIG. 12 is a schematic view of another structure of a fixing ring according to a second embodiment of the present application;

FIG. 13 is a schematic view of a rotating ring mated with the stationary ring of FIG. 12;

FIG. 14 is a side view of the position of the stop member of the ocular axial marker of FIG. 9;

FIG. 15 is a schematic view of an eye axial marker according to a third embodiment of the present application, without illustrating a rotating ring;

FIG. 16 is a schematic view of a rotating ring of an eye axial marker in a third embodiment of the present application;

FIG. 17 is a schematic view of an ocular axial marker in a fourth embodiment of the present application;

FIG. 18 is an enlarged view of the location of the locking member of FIG. 17;

fig. 19 is a cross-sectional view of fig. 17.

The reference numerals in fig. 1-19 are as follows:

1-a marking head;

11-a fixing ring; 111-a first scale line; 112-an inside step; 113-an outer step; 114-a limit column;

12-rotating a ring; 121-a second tick mark; 122-a marker; 1221-linear protrusions; 122 a-a hollowed-out structure;

2-operating a handle; 2 a-a first perforation; 2 b-a second perforation;

3-a locking member; 31-an operating lever; 311-press position; 311' -pressing position; 32-abutting the rod; 33-an intermediate lever; 34-shrapnel; 35-torsion spring.

Detailed Description

In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.

1-6, FIG. 1 is a schematic view of an eye axial marker according to a first embodiment of the present application, and does not show a rotary ring 12; FIG. 2 is a schematic view of the fixation ring 11 of the ocular axial marker of FIG. 1;

FIG. 3 is a schematic view of a rotating ring 12 of an eye axial marker in a first embodiment of the present application; FIG. 4 is a top view of the swivel ring 12 of FIG. 3; FIG. 5 is a schematic view showing the assembled rotary ring 12 and stationary ring 11 of the eye axial marker in the first embodiment; fig. 6 is a schematic view of the rotating ring 12 in fig. 5 after rotating a certain angle.

The eye axial marker in this embodiment comprises a marker head 1 (shown in fig. 5 and 6), wherein the marker head 1 comprises a fixed ring 11 and a rotating ring 12, the fixed ring 11 and the rotating ring 12 are in a circular ring structure, the rotating ring 12 can coaxially rotate relative to the fixed ring 11, the eye axial marker further comprises a locking part 3, the locking part 3 can limit the rotating ring 12 to rotate relative to the fixed ring 11, namely, the rotating ring 12 can rotate, and when the rotating ring 12 needs to be limited to rotate relative to the fixed ring 11, the locking part 3 can perform locking operation to limit the rotating ring 12 to rotate.

In addition, the fixed ring 11 and the rotating ring 12 are marked with graduation marks, the fixed ring 11 is defined to be marked with a first graduation mark 111, and the rotating ring 12 is defined to be marked with a second graduation mark 121. Obviously, after the fixed ring 11 and the rotating ring 12 are assembled and matched, the marking lines of the fixed ring 11 and the rotating ring 12 can be compared in the radial direction, as shown in fig. 5 and 6, namely, the marking lines of the fixed ring 11 and the rotating ring 12 are projected in the axial direction, at least part of the marking lines are staggered in the radial direction and do not overlap, so that the degree comparison can be carried out. It should be noted that, in this embodiment, the minimum scale of the rotating ring 12 and the minimum scale of the fixed ring 11 have a predetermined difference, and the minimum scale of the fixed ring 11 is an angle corresponding to a section between the two first scale lines 111, and the minimum scale of the rotating ring 12 is an angle corresponding to a section between the two second scale lines 121.

Specifically, the predetermined difference between the minimum scale of the rotary ring 12 and the minimum scale of the fixed ring 11 is, for example, 1 °. The fixing ring 11 can be marked with a scale of 0-360 degrees, the precision can be 5 degrees or 10 degrees, namely the minimum scale is 5 degrees or 10 degrees, and other values can be adopted. The minimum scale of the rotating ring 12 may be 4 ° or 9 ° in precision, and the rotating ring 12 may be marked with scale marks within a section of radian, for example, 10 scales are marked within a 90 ° section, and each minimum scale is 9 °, and the second scale mark 121 of the rotating ring 12 in fig. 5 is specifically from the number 0 to the number 9. The working principle of the eye axial marker in this embodiment is described by taking the minimum scale of the fixed ring 11 as 10 ° and the minimum scale of the rotary ring 12 as 9 °.

In use, for example, to find the axis of the eye angle a, for example 33 °, during surgery, the following procedure is performed:

firstly, marking a 0/180 degree horizontal position of an eyeball when a patient sits down, and enabling the patient to enter an operating room for lying down;

the operator or assistant adjusts the rotary ring 12 so that the second graduation mark 121 of the 0 th position of the rotary ring 12 reaches the 30 ° position of the fixed ring 11. The second graduation mark 121 in the 0 th position is the position corresponding to the marking part 122 in fig. 5 and 6, namely, the second graduation mark 121 in the 0 th position of the rotating ring 12 and the first graduation mark 111 in the 30 ° position of the fixed ring 11 are aligned in the radial direction, as shown in fig. 5, then the rotating ring 12 is further rotated, specifically, rotated anticlockwise, on the basis of fig. 5, carefully, so that the second graduation mark 121 in the 3 rd position of the rotating ring 12 is aligned with the first graduation mark 111 in the adjacent position on the fixed ring 11, as shown in fig. 6, from the first graduation mark 111 corresponding to the 30 ° position, the third first graduation mark 111 corresponds to 60 ° of the fixed ring 11, namely, the second graduation mark 121 in the 3 rd position of the rotating ring 12 is aligned in the radial direction with the first graduation mark 111 in the 60 ° position of the fixed ring 11. Since each minimum scale on the rotary ring 12 is 1 ° less than the fixed ring 11, as shown in fig. 6, the angle a between the first scale line 111 of 30 ° of the fixed ring 11 and the second scale line 121 of 0 th bit of the rotary ring 12 should be 3 °, i.e., the second scale line 121 of 120 th bit of the rotary ring advances 3 ° compared to the first scale line 111 of 30 ° of the fixed ring 11, and is represented as a counterclockwise rotation of 3 ° in fig. 6, then the position indicated by the second scale line 121 of 0 th bit of the rotary ring 12 is 33 °. That is, the approximate position (the number in hundred and ten digits of the target angle) can be found by referring to the graduation marks of the fixed ring 11, and then the position is made to be accurate to 1 ° (the number in units of the target angle) by means of the graduation marks on the rotary ring 12.

Therefore, in this embodiment, the improvement of the adjustment accuracy of the eye axial angle can be realized in a relatively simple manner by using the minimum scale difference between the rotating ring 12 and the fixed ring 11, and the eye axial angle adjustment accuracy is not limited by the marks of the radial dimensions of the limited fixed ring 11 and the rotating ring 12. From the above analysis it can be seen that the minimum graduations of the fixed ring 11 and the rotary ring 12 can be 9 °, 10 °, while the accuracy can reach 1 °, the accuracy depending on the minimum graduation difference of the fixed ring 11 and the rotary ring 12. It can be seen that the difference between the minimum scales of the rotating ring 12 and the fixed ring 11 is not limited to 1 °, but may be 0.5 ° or 2 °, i.e., greater than 1 ° or less than 1 °, which is specifically designed according to practical requirements, and is set to 1 ° so as to facilitate the alignment rotation of the mark line. In addition, the minimum scale of the rotating ring 12 is smaller than the minimum scale of the fixed ring 11 in this embodiment, it is known that the minimum scale of the rotating ring 12 is larger than the minimum scale of the fixed ring 11, so that the number 0 scale line of the rotating ring 12 can be aligned with a position larger than the target angle, and then the rotating angle in the embodiment in fig. 5 and 6 is reversed and recalled, so as to achieve the purpose of adjusting accuracy, for example, the minimum scale of the rotating ring 12 is 11 °, the minimum scale of the fixed ring 11 is 10 °, if the target angle is 33 °, the alignment can be performed by 40 °, and then the number 7 scale line is recalled, namely, the 7 ° is recalled, so as to adjust to 33 °.

In addition, as shown in fig. 3, 5 and 6, the rotating ring 12 in this embodiment is provided with a marking portion 122, the marking portion 122 may be used to mark the surface of the eyeball after the eye axial position angle is determined, and the marking portion 122 may be disposed at the position of the first scale line 111 of the 0 th position of the rotating ring 12, and no 0 is marked in fig. 3. The marking portion 122 is a protruding portion extending radially inward of the rotating ring 12 in this embodiment, and the protruding portion is a hollow structure, in this embodiment, the rotating ring 12 is located at the outer side of the fixed ring 11, and the hollow structure can expose the first scale line 111 of the fixed ring 11, so as to facilitate alignment operation. The rotating ring 12 may have two marks 122 symmetrically arranged in a radial direction, one mark 122 corresponding to the second scale line 121 of the number 0 position, and the radially symmetrical arrangement facilitates alignment with the first scale line 111 of the fixed ring 11.

As shown in fig. 7, fig. 7 is a schematic view of another structure of the rotating ring 12 in the present embodiment. The tail end of the protruding part of the structure can be provided with a straight line shape, so that the ink can be conveniently dipped and dyed to leave a linear mark on the surface of the eyeball. In addition, in fig. 7, the end of the marking portion 122 may be configured as a hollow structure 112a, and the hollow structure 112a may be linear, and at this time, marking may be performed by a marker through the hollow structure 112 a.

As can be appreciated in conjunction with fig. 1 and 8, fig. 8 is a side view of the position of the stop member of the ocular axial marker of fig. 1.

The locking member 3 in this embodiment includes a link assembly including a abutting lever 32 and an operating lever 31, the abutting lever 32 being for abutting against the rotary ring 12 to restrict rotation of the rotary ring 12, and a torsion spring holding the abutting of the abutting lever 32, an external force acting on the operating lever 31, which can cause the abutting lever 32 to release the rotary ring 12. The connecting rod assembly in this embodiment specifically includes articulated action bars 31 and butt pole 32, and action bars 2 are provided with first hole portion 2a, second hole portion 2b, and the both ends of action bars 31 are first end and second end, and action bars 31 pass first hole portion 31, and first end is located action bars 2 towards the one side of marking head 1, and the second end of action bars 31 is located action bars 2 and keeps away from the opposite side of marking head 1, and action bars 31 are the bending structure, and its first end is supported and is pressed at the surface of action bars. The two ends of the supporting rod 32 are a third end and a fourth end, the third end passes through the second hole part 2b and can be abutted against the rotating ring 12, and the fourth end of the supporting rod 32 is hinged with the second end of the operating rod 31. The locking member 3 further includes a torsion spring (not illustrated in fig. 8) provided between the operation lever 31 and the abutting lever 32 to urge the abutting lever 32 to remain in a state of abutting against the abutting lever 32. At this time, the pressing position 311 of the first rod portion 31 is pressed, so that the elastic force of the torsion spring can be overcome, the abutting rod 32 is urged to be far away from the rotating ring 12, and accordingly the fixed ring 11 and the rotating ring 12 are released, and the rotating ring 12 and the fixed ring 11 are locked again when the pressing force is removed, and the locking mode is simple and easy to operate.

In addition, the eye axial position marker further comprises a limiting component for limiting the radial movement of the rotating ring 12 relative to the fixed ring 11, so that the position of the rotating ring 12 relative to the fixed ring 11 is more stable, the radial movement is reduced in the rotating process, and the reliability of angle adjustment is ensured. In the first embodiment, the rotating ring 12 is directly sleeved on the fixed ring 11, that is, the inner peripheral wall of the rotating ring 12 is directly used as a limiting component to limit the radial movement of the rotating ring 12 relative to the fixed ring 11.

Specifically, in the first embodiment, the extension plate 123 is formed by extending part of the edge of the upper portion of the rotating ring 12 inward, the extension plate 123 is used for marking the graduation marks on the rotating ring 12, in fig. 3, the extension plate 123 is an arc-shaped plate, and when the rotating ring 12 and the fixed ring 11 are assembled, the extension plate 123 is located above the fixed ring 11, so that the rotating ring 12 and the fixed ring 11 can be limited in the axial direction, and of course, the extension plate 123 does not cover the graduation marks on the fixed ring 11 to ensure the alignment operation of the two.

With continued reference to fig. 9-10, fig. 9 is a schematic view of an eye axial marker according to a second embodiment of the present application; fig. 10 is a schematic view of the fixation ring 11 of the eye axial marker of fig. 9.

The structure of this embodiment is basically the same as that of the first embodiment, and the working principle is the same, that is, the eye axial position angle mark with smaller precision is realized by using the minimum scale difference between the fixed ring 11 and the rotating ring 12, and the same structure parts are not repeated, and the differences from the first embodiment are mainly described below.

As shown in fig. 10, the inner side of the fixed ring 11 is provided with an inner side step portion 112, and at this time, the inner side step portion 112 is a stopper, the rotating ring 12 is supported on the step surface of the inner side step portion 112, and the step side wall of the inner side step portion 112 abuts against the outer peripheral wall of the rotating ring 12, thereby restricting radial movement of the rotating ring 12 and the fixed ring 11.

In addition, as shown in fig. 11, fig. 11 is a schematic view of still another structure of the rotating ring 12 in the present embodiment.

The rotary ring in fig. 11 can be used with the fixed ring 11 in fig. 9, unlike the triangular mark portion in fig. 9, the whole mark portion 122 of the rotary ring 12 in fig. 11 is in a vertically arranged thin plate shape, and a linear protrusion 1221 is arranged below the end of the rotary ring, so that the dip-dyeing ink can leave a linear mark on the surface of the eyeball.

Referring again to fig. 12 and 13, fig. 12 is a schematic view of another structure of the fixing ring 11 according to the second embodiment of the present application; fig. 13 is a schematic view of the rotating ring 12 mated with the stationary ring 11 of fig. 12, the rotating ring 12 of fig. 13 being identical in structure to the rotating ring 12 of fig. 11, except for smaller radial dimensions.

As shown in fig. 12, the outer side of the fixed ring 11 is provided with an outer step 113, and at this time, the outer step 113 is a stopper, the rotating ring 12 is supported on a step surface of the outer step 113, and a step side wall of the outer step 113 abuts against an inner peripheral wall of the rotating ring 12 to restrict radial movement of the rotating ring 12 and the fixed ring 11.

Furthermore, the locking member 3 of the eye axial marker in the second embodiment is slightly different from the locking member 3 in the first embodiment. It will be appreciated with continued reference to fig. 14, that fig. 14 is a side view of the position of the stop member of the ocular axial marker of fig. 9.

As shown in fig. 14, the lock member 3 in this embodiment includes an operation lever 31, an intermediate lever 33, and an abutment lever 32 which are sequentially hinged, and a torsion spring (not shown in fig. 14) is provided between the operation lever 31 and the intermediate lever 33, the fixed ring 11 is provided with a hole portion, the abutment lever 32 passes through the hole portion of the fixed ring 11 to be abutted against the outer peripheral wall of the rotary ring 12, the operation handle 2 is provided with a first hole portion 2a, the second end of the operation lever 31 and one end of the third lever portion 33 are hinged, the hinged position is located at the first hole portion 2a, the other end of the intermediate lever 33 and one end of the abutment lever 32 are hinged, and the first end of the operation lever 31 is a free end. At this time, the first end of the operating lever 31 is pressed against the spring force of the torsion spring to urge the abutting lever 32 to slide along the hole of the fixed ring 11, so that the rotating ring 12 is released, and after the external force is removed, the rotating ring 12 can be abutted again to prevent rotation relative to the fixed ring 11, thereby achieving the purpose of locking. Here, when the rotary ring 12 is located outside the fixed ring 11, a hole portion is provided in the operation handle 2 for the abutting rod 33 to pass through and abut against the outer peripheral wall of the rotary ring 12, and when the rotary ring 12 is located inside the fixed ring 11, a hole portion may be provided in the fixed ring 11 for the abutting rod 33 to pass through and abut against the outer peripheral wall of the rotary ring 12.

With continued reference to fig. 15 and 16, fig. 15 is a schematic view of an eye axial marker according to a third embodiment of the present application, not illustrating the rotary ring 12; fig. 16 is a schematic view of a rotating ring 12 of an eye axial marker in a third embodiment of the present application.

The structure of this embodiment is basically the same as that of the first embodiment, and the working principle is the same, that is, the eye axial position angle mark with smaller precision is realized by using the minimum scale difference between the fixed ring 11 and the rotating ring 12, and the same structure parts are not repeated, and the differences from the first embodiment are mainly described below. One of the differences is that the locking member 3 in this embodiment includes a screw, the operating handle 2 is provided with a threaded hole, the screw and the threaded hole are in threaded engagement, the screw rotates to come close to and abut against the rotating ring 12 or come away from to release the rotating ring 12, and specifically may abut against the upper surface of the rotating ring 12 for the purpose of fixing the locking rotating ring 12 and the fixing ring 11.

In addition, the limiting member in the third embodiment includes a plurality of limiting posts 113 distributed along the circumferential direction of the fixed ring 11, and the limiting posts 113 abut against the outer circumferential wall of the rotating ring 12 to limit the radial displacement of the fixed ring 11 and the rotating ring 12, which is simple in structure.

Referring to fig. 17-19, fig. 17 is a schematic view of an eye axial marker according to a fourth embodiment of the present application; FIG. 18 is an enlarged view of the location of the locking member of FIG. 17; fig. 19 is a cross-sectional view of fig. 17.

The structure of this embodiment is basically the same as that of the first embodiment, and the working principle is the same, that is, the eye axial position angle mark with smaller precision is realized by using the minimum scale difference between the fixed ring 11 and the rotating ring 12, and the same structure parts are not repeated, and the differences from the first embodiment are mainly described below. One of the differences is that the locking member 3 in this embodiment is different, the locking member 3 in this embodiment includes an operation lever 31, the operation lever 31 is located at one side of the operation handle 2 near the marking head 1, a spring piece 34 is provided between the operation lever 31 and the operation handle 2, and the operation lever 31 and the operation handle 2 are connected by a torsion spring 35, the operation lever 31 is substantially L-shaped, the bottom thereof is a pressing portion 312, the pressing portion 312 can be pressed against the upper end surface of the rotating ring 12, thereby pressing the rotating ring 12 and the fixed ring 11, and the spring force of the spring piece 34 and the torsion spring 35 is the pressing portion 312 for maintaining the operation lever 31 to press the rotating ring 12. When the rotating ring 12 needs to be adjusted, an operator can press the upper end of the operating rod 31 to compress the elastic sheet 34 and overcome the elastic force of the torsion spring 35, so that the pressing part 312 rotates upwards around the position of the torsion spring 35, thereby loosening the rotating ring 12, and after the operating rod 31 is loosened, the pressing part 312 is used for re-pressing the rotating ring 12 under the restoring force of the elastic sheet 34 and the torsion spring 35.

In order to facilitate the pressing operation, a pressing position 311 'may be provided on the operation lever 31, and the pressing position 311' may be provided with a structure that facilitates pressing and lifting the tactile sensation. The elastic piece 34 and the torsion spring 35 may be integrally provided, or only one of them may be provided, and when only the elastic piece 34 is provided, the operation lever 31 and the operation handle 2 may be rotatably connected, and may be relatively rotated. In each embodiment, the locking member 3 is maintained at the locking position mainly by an elastic member, and the elastic member may be a torsion spring 35 or a spring piece 34.

It should be noted that, in any of the above embodiments, the specific structures of the rotating ring 12 and the fixed ring 11, and the structures of the locking member 3 and the limiting member may be replaced or combined with each other without collision. Such as the stopper post 114, the locking element 3 and the first and second embodiments of the third and fourth embodiments may be replaced with each other.

Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims (12)

1. The eye axial position marker is characterized by comprising a fixed ring, a rotating ring and a locking component, wherein the rotating ring can coaxially rotate relative to the fixed ring, and the locking component can limit the rotating ring to rotate relative to the fixed ring; the fixed ring and the rotating ring are marked with scale marks, and the minimum scale of the rotating ring and the minimum scale of the fixed ring have preset difference values.

2. The ocular axial marker of claim 1, wherein the predetermined difference between the minimum scale of the rotating ring and the minimum scale of the stationary ring is 1 °.

3. The ocular axial marker of claim 1, wherein the rotating ring is radially symmetrically arranged with two markers.

4. The ocular axial marker of claim 1, further comprising a stop member limiting radial movement of the rotating ring relative to the stationary ring.

5. The ocular axial marker of claim 4, wherein the stop member comprises a plurality of stop posts circumferentially distributed along the stationary ring, the stop posts abutting the peripheral wall of the rotating ring.

6. The eye axial marker according to claim 4, wherein an inner step portion is provided on an inner side of the fixed ring, the inner step portion is the limiting member, the rotating ring is supported on a step surface of the inner step portion, and a step side wall of the inner step portion abuts against an outer peripheral wall of the rotating ring;

or, an outer step part is arranged on the outer side of the fixed ring, the outer step part is the limiting part, the rotating ring is supported on the step surface of the outer step part, and the step side wall of the outer step part abuts against the inner peripheral wall of the rotating ring.

7. The eye axial marker of claim 4, wherein the rotating ring is sleeved outside the fixed ring, and an inner peripheral wall of the rotating ring is the limiting member.

8. The ocular axial marker of claim 7, wherein a portion of the rim of the upper portion of the rotary ring extends inwardly to form an extension plate, the extension plate being marked with graduation marks, the extension plate being located above the stationary ring.

9. The ocular axial marker of any one of claims 1-8, further comprising an operating handle, the securing ring being secured to one end of the operating handle.

10. The ocular axial marker of claim 9, wherein the locking member comprises a screw, the handle providing a threaded bore, the screw and the threaded bore being threadedly engaged, the screw rotating to approach and abut against the rotating ring or away from to loosen the rotating ring; or, the locking component comprises an operating rod and an elastic component, wherein the operating rod is used for abutting against the rotating ring or the fixed ring so as to limit the rotating ring to rotate relative to the fixed ring.

11. The ocular axial marker of claim 10, wherein the resilient member comprises a spring plate and/or a torsion spring.

12. The eye axial marker according to claim 11, wherein the elastic member includes a torsion spring, the locking member includes a link assembly including a abutting lever and the operating lever, the operating lever or the fixing ring is provided with a hole portion, the abutting lever passes through the hole portion and abuts against an outer peripheral wall of the rotating ring under the action of the torsion spring, the operating lever is pressed against the torsion spring force, and the abutting lever releases the rotating ring; or, the operating lever has a pressing portion, and the elastic member maintains the pressing portion to press against the upper end surface of the rotating ring.