Prism switching mechanism and ophthalmic operation microscope

Abstract

The present disclosure relates to the technical field of ophthalmic operation microscopes. Disclosed are a prism switching mechanism and an ophthalmic operation microscope. The prism switching mechanism comprises a housing assembly, a rotating block and a driving assembly, wherein the rotating block is rotatably connected to the housing assembly, and a plurality of prisms are arranged along the circumference of a rotating shaft of the rotating block; and the driving assembly can be connected to the rotating block in a driving manner, and is configured to drive the rotating block to rotate in order to switch the positions of the plurality of prisms in the horizontal direction.

Description

Prism switching mechanism and ophthalmic surgical microscope Technical Field

[0001] The present disclosure relates to the technical field of ophthalmic surgical microscopes, and in particular to a prism switching mechanism and an ophthalmic surgical microscope. Background Art

[0002] Ophthalmic surgical microscopes can be used for anterior segment imaging and posterior segment imaging (fundus imaging), which requires switching between the two modes of anterior segment imaging and posterior segment imaging in the optical system of the ophthalmic surgical microscope. The current switching structure is to flip the pentaprism and the roof prism in the vertical space to achieve mode switching. In the process of realizing the embodiment of the present disclosure, the inventors found that in the process of flipping the prisms in the vertical space, it is necessary to overcome the gravity of the two groups of prisms and the friction between the structures caused by gravity. Therefore, for electric switching, this design method has relatively high requirements on the output power of the motor. For manual switching, this design method will make the user more laborious.

[0003] Summary of the Invention

[0004] Based on the above, the purpose of the present disclosure is to provide a prism switching mechanism and an ophthalmic surgical microscope, so that multiple prisms can be switched in the horizontal direction without overcoming the gravity of the prisms themselves.

[0005] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0006] In one aspect, a prism switching mechanism is provided, comprising:

[0007] housing assembly;

[0008] a rotating block rotatably connected to the housing assembly, wherein the rotating block is provided with a plurality of prisms in a circumferential direction along a rotation axis thereof;

[0009] A driving assembly is drivably connected to the rotating block, and the driving assembly is used to drive the rotating block to rotate so that the plurality of prisms switch positions in a horizontal direction.

[0010] As an optional technical solution for a prism switching mechanism, the shell assembly includes a base and a supporting cross bar, the supporting cross bar is connected to the inner wall of the base, the rotating block is respectively provided with a first shaft portion and a second shaft portion at both ends along the vertical direction, the supporting cross bar is provided with a first connecting hole, the first shaft portion is rotatably connected to the first connecting hole, and the second shaft portion is rotatably connected to the base.

[0011] As an optional technical solution for a prism switching mechanism, the driving assembly includes a bracket, a motor, a first gear and a second gear, the first shaft portion is passed through the first connecting hole, and the first gear is installed at the portion of the first shaft portion extending out of the first connecting hole; the bracket is installed in the base, the motor is installed on the bracket, and the output end of the motor is installed with a second gear, and the second gear can be drivenly connected to the first gear.

[0012] As an optional technical solution of the prism switching mechanism, the driving assembly further includes a third gear, the third gear is rotatably connected to the bracket, and the third gear is respectively meshed with the first gear and the second gear.

[0013] As an optional technical solution for a prism switching mechanism, the rotating block is provided with two prisms in the circumferential direction along its rotation axis. The two prisms are provided on both sides of the rotating block. One of the two prisms is a pentaprism and the other is a roof prism.

[0014] As an optional technical solution for a prism switching mechanism, a first limiting portion and a second limiting portion are respectively provided at both ends of the supporting cross bar, and the rotating block is provided with an abutting portion. When the rotating block rotates forward to the first position relative to the supporting cross bar, one side of the abutting portion abuts against the first limiting portion. When the rotating block rotates backward to the second position relative to the supporting cross bar, the other side of the abutting portion abuts against the second limiting portion.

[0015] As an optional technical solution of the prism switching mechanism, one or both of the first limiting portion and the second limiting portion are threadedly connected to an adjusting threaded rod, and the abutting portion can abut against the end surface of the adjusting threaded rod.

[0016] As an optional technical solution of a prism switching mechanism, the abutting portion is provided with a first mounting groove, a magnet is provided in the first mounting groove, the adjusting threaded rod is a magnetic component, and the magnet can be magnetically attracted to the adjusting threaded rod.

[0017] As an optional technical solution for a prism switching mechanism, it also includes a plurality of prism brackets, which correspond one-to-one to the plurality of prisms. Each prism is mounted on a prism bracket, and the prism bracket is detachably connected to the side wall of the rotating block.

[0018] As an optional technical solution of the prism switching mechanism, the prism bracket can be adjusted in pitch relative to the rotating block; and / or the prism bracket can be adjusted in height relative to the rotating block.

[0019] As an optional technical solution for a prism switching mechanism, the shell assembly also includes an upper cover, which is detachably connected to the base, and the upper cover is provided with a second connecting hole. The first shaft portion is passed through the first connecting hole and the second connecting hole, and a manual knob is installed at the portion where the first shaft portion extends out of the second connecting hole.

[0020] On the other hand, an ophthalmic surgical microscope is provided, comprising the prism switching mechanism described in any embodiment of the present disclosure.

[0021] The beneficial effects of the present disclosure are:

[0022] The present disclosure provides a prism switching mechanism and an ophthalmic surgical microscope. When the operating mode of the ophthalmic surgical microscope needs to be switched, the prism position can be switched by the prism switching mechanism. A drive assembly drives a rotating block to rotate, causing multiple prisms to switch positions horizontally, thereby achieving different mode switching requirements. Because the multiple prisms are located circumferentially along the rotating block's rotational axis, there is no need to overcome the gravity of the prisms themselves when switching horizontally. For electric switching, this design reduces the output power requirements of the motor. For manual switching, this design reduces user effort and improves switching accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present disclosure and these drawings without any creative work.

[0024] FIG1 exemplarily shows a schematic structural diagram of a prism switching mechanism according to an embodiment of the present disclosure;

[0025] FIG2 exemplarily shows a partial structural diagram of a prism switching mechanism according to an embodiment of the present disclosure;

[0026] FIG3 exemplarily shows a structural exploded view of a prism switching mechanism according to an embodiment of the present disclosure;

[0027] FIG4 exemplarily shows a partial structural exploded view of a prism switching mechanism according to an embodiment of the present disclosure;

[0028] FIG5 exemplarily shows a top view of the anterior segment mode of the prism switching mechanism according to an embodiment of the present disclosure;

[0029] FIG6 exemplarily shows a top view of the posterior segment mode of the prism switching mechanism according to an embodiment of the present disclosure;

[0030] FIG7 exemplarily shows a cross-sectional view of an anterior segment mode of a prism switching mechanism according to an embodiment of the present disclosure;

[0031] FIG8 is an enlarged view of point A in FIG7 .

[0032] The following are marked in the figure:

[0033] 1. Housing assembly; 11. Base; 111. Boss; 112. Front end; 113. Lens; 12. Support crossbar; 121. First stopper; 122. Second stopper; 123. Adjustment threaded rod; 124. Magnet; 125. First connecting hole; 126. Top screw; 13. Upper cover; 131. Second connecting hole;

[0034] 2. Rotating block; 21. First shaft portion; 22. Second shaft portion; 23. Abutment portion; 24. First mounting groove; 25. Second mounting groove;

[0035] 3. Drive assembly; 31. Bracket; 32. Motor; 33. First gear; 34. Second gear; 35. Third gear;

[0036] 4. Prism; 41. Pentaprism; 42. Roof prism;

[0037] 5. Prism bracket; 51. Mounting port; 52. Fastening screw; 53. Ball head positioning pin; 54. Adjustment slot;

[0038] 6. Manual knob. DETAILED DESCRIPTION

[0039] The present disclosure will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present disclosure and are not intended to limit the present disclosure. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present disclosure, not all structures.

[0040] In the description of this disclosure, unless otherwise expressly specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0041] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] This embodiment provides an ophthalmic surgical microscope including a prism switching mechanism. As shown in Figures 1 and 2, the prism switching mechanism includes a housing assembly 1, a rotating block 2, and a drive assembly 3. The rotating block 2 is rotatably connected to the housing assembly 1 and is circumferentially provided with multiple prisms 4 along its rotational axis. The drive assembly 3 is drivably connected to the rotating block 2 and is configured to drive the rotating block 2 to rotate, thereby horizontally shifting the positions of the multiple prisms 4. When the operating mode of the ophthalmic surgical microscope needs to be switched, the prism switching mechanism can be used to shift the positions of the prisms 4. The drive assembly 3 rotates the rotating block 2, wherein the rotational axis of the rotating block 2 is vertically arranged, thereby shifting the positions of the multiple prisms 4 horizontally, thereby achieving the switching requirements of different operating modes. Because the multiple prisms 4 are located circumferentially along the rotational axis of the rotating block 2, the multiple prisms 4 do not need to overcome their own gravity when switching horizontally. For electric switching, this design reduces the output power requirements of the motor. For manual switching, this design reduces user effort and improves switching accuracy.

[0044] In this embodiment, as shown in Figures 2-4, the housing assembly 1 includes a base 11 and a support crossbar 12. The support crossbar 12 is connected to the inner wall of the base 11. The rotating block 2 is provided with a first shaft portion 21 and a second shaft portion 22 at both ends in the vertical direction. The support crossbar 12 is provided with a first connection hole 125. The first shaft portion 21 is rotatably connected to the first connection hole 125, and the second shaft portion 22 is rotatably connected to the base 11, thereby achieving a rotational connection between the rotating block 2 and the housing assembly 1. Among them, the inner wall of the base 11 is provided with two bosses 111. The two ends of the support crossbar 12 overlap the two bosses 111, and the two ends of the support crossbar 12 are screwed to the two bosses 111 to improve the stability of the connection.

[0045] Furthermore, the drive assembly 3 includes a bracket 31, a motor 32, a first gear 33, and a second gear 34. The first shaft 21 is inserted into the first connection hole 125, and the first gear 33 is mounted on the portion of the first shaft 21 extending out of the first connection hole 125. The bracket 31 is mounted within the base 11, and the motor 32 is mounted on the bracket 31. The output end of the motor 32 is mounted with a second gear 34, which is drivably connected to the first gear 33. The motor 32 drives the second gear 34 to rotate, which in turn drives the first gear 33 and the rotating block 2 to rotate. This enables the drive assembly 3 to rotate the rotating block 2, thereby driving the switching of the prism 4.

[0046] Optionally, the drive assembly 3 further includes a third gear 35, which is rotatably connected to the bracket 31 and is meshedly connected to the first gear 33 and the second gear 34. The second gear 34 indirectly drives the first gear 33 to rotate via the third gear 35, which can reduce the size of the second gear 34 and facilitate spatial layout.

[0047] In this embodiment, as shown in FIG3 , the rotating block 2 is provided with two prisms 4 in the circumferential direction along its rotation axis. The two prisms 4 are provided on both sides of the rotating block 2. One of the two prisms 4 is a pentaprism 41, and the other is a roof prism 42. As shown in FIG5 and FIG7 , the base 11 is provided with a front end 112, and a lens 113 is provided within the front end 112. The pentaprism 41 is rotated to the side close to the lens 113 so that the light-incoming surface of the pentaprism 41 is perpendicular to the incident light, and the light-outgoing surface of the pentaprism 41 is perpendicular to the axis of the lens 113, thereby switching the ophthalmic surgical microscope to the anterior segment mode. As shown in FIG6 , the roof prism 42 is rotated to the side close to the lens 113 so that the light-incoming surface of the roof prism 42 is perpendicular to the incident light, and the light-outgoing surface of the roof prism 42 is perpendicular to the axis of the lens 113, thereby switching the ophthalmic surgical microscope to the posterior segment mode.

[0048] Optionally, a first limiting portion 121 and a second limiting portion 122 are respectively provided at both ends of the support crossbar 12, and the rotating block 2 is provided with an abutting portion 23. When the rotating block 2 rotates forward relative to the support crossbar 12 to the first position, one side of the abutting portion 23 abuts against the first limiting portion 121. When the rotating block 2 rotates reversely relative to the support crossbar 12 to the second position, the other side of the abutting portion 23 abuts against the second limiting portion 122. The first limiting portion 121 and the second limiting portion 122 can be used to locate the position of the rotating block 2, ensuring that the prism 4 rotates to a preset position, thereby improving switching accuracy. In this embodiment, since the pentaprism 41 and the roof prism 42 are provided on both sides of the rotating block 2, the rotation angle for switching between the first and second positions is 180°.

[0049] Alternatively, as shown in Figures 2 and 4, one or both of the first limiting portion 121 and the second limiting portion 122 are threadedly connected to an adjusting threaded rod 123, and the abutting portion 23 can abut against the end surface of the adjusting threaded rod 123. In this embodiment, the first limiting portion 121 and the second limiting portion 122 are both threadedly connected to the adjusting threaded rod 123. By controlling the screwing depth of the adjusting threaded rod 123 relative to the first limiting portion 121 and the second limiting portion 122, the rotation angle of the rotating block 2 is adjusted, further ensuring that the prism 4 rotates to a preset position, and the controllability is strong. Among them, the first limiting portion 121 and the second limiting portion 122 are both provided with a first threaded hole, and the adjusting threaded rod 123 is threadedly connected to the first threaded hole. Optionally, the side wall of the first threaded hole is provided with a second threaded hole, and the top screw 126 is threadedly connected to the second threaded hole. When the adjusting threaded rod 123 is adjusted to a preset position, the top screw 126 abuts against the side wall of the adjusting threaded rod 123 to prevent the adjusting threaded rod 123 from moving relative to the first limiting portion 121 and the second limiting portion 122, thereby improving structural reliability.

[0050] When the driving assembly 3 drives the rotating block 2 to rotate, the abutment portion 23 may hit the end face of the adjusting threaded rod 123 due to excessive force, resulting in rebound, which may lead to the inability to ensure that the abutment portion 23 is completely in contact with the end face of the adjusting threaded rod 123. In order to solve the above problem, the abutment portion 23 is provided with a first mounting groove 24, and a magnet 124 is provided in the first mounting groove 24. The adjusting threaded rod 123 is a magnetic component, and the magnet 124 can be magnetically attracted to the adjusting threaded rod 123. When the abutment portion 23 abuts against the end face of the adjusting threaded rod 123, the magnet 124 is magnetically attracted to the adjusting threaded rod 123, ensuring that the abutment portion 23 is completely in contact with the end face of the adjusting threaded rod 123, and ensuring that the rotating block 2 does not vibrate or shake, thereby improving the repeatability of positioning. Among them, the adjusting threaded rod 123 can be martensitic stainless steel.

[0051] Alternatively, when the driving component 3 drives the rotating block 2 to rotate, the abutment portion 23 may not be able to abut against the end face of the adjusting threaded rod 123 due to insufficient force. At this time, the magnet 124 is magnetically attracted to the adjusting threaded rod 123, and the abutment portion 23 is adsorbed to the end face of the adjusting threaded rod 123, thereby assisting the abutment portion 23 to abut against the adjusting threaded rod 123.

[0052] In this embodiment, as shown in Figure 3, the prism switching mechanism also includes a plurality of prism brackets 5, and the plurality of prism brackets 5 correspond one-to-one to the plurality of prisms 4. Each prism 4 is mounted on a prism bracket 5, and the prism bracket 5 is detachably connected to the side wall of the rotating block 2, so that the prism 4 is installed on the side wall of the rotating block 2.

[0053] It should be noted that the installation angle of the prism 4 can be adaptively adjusted according to actual needs. In this embodiment, the prism bracket 5 can be adjusted in pitch relative to the rotating block 2; and / or the prism bracket 5 can be adjusted in height relative to the rotating block 2.

[0054] In this embodiment, as shown in Figures 3, 7, and 8, the prism holder 5 is provided with a mounting opening 51, into which the prism 4 can be embedded and bonded by glue. The prism holder 5 is provided with at least three through-holes, and the side wall of the rotating block 2 is provided with at least three third threaded holes, with the through-holes corresponding to the third threaded holes. Fastening screws 52 are passed through the through-holes and threadedly connected to the third threaded holes, thereby achieving a detachable connection between the prism holder 5 and the side wall of the rotating block 2. Because the adjustment screws and the through-holes have a clearance fit, the prism holder 5 can move up and down relative to the adjustment screws, thereby achieving height adjustment of the prism holder 5 relative to the rotating block 2.

[0055] Optionally, an adjustment groove 54 is provided on one side of the prism bracket 5 close to the side wall of the rotating block 2, and a second mounting groove 25 is provided on the side wall of the rotating block 2. A ball head positioning pin 53 is installed in the second mounting groove 25, and the ball head positioning pin 53 abuts against the bottom of the adjustment groove 54. The ball head positioning pin 53 creates a gap between the portion of the prism bracket 5 where the adjustment groove 54 is provided and the side wall of the rotating block 2. Exemplarily, the gap can be 1 mm. By adjusting the different screwing depths of the three adjusting screws, the prism bracket 5 can be pitched and adjusted relative to the rotating block 2.

[0056] Furthermore, as shown in Figures 1 and 3, the shell assembly 1 also includes an upper cover 13, which is detachably connected to the base 11. The upper cover 13 is provided with a second connecting hole 131, the first shaft portion 21 is passed through the first connecting hole 125 and the second connecting hole 131, and a manual knob 6 is installed at the position where the first shaft portion 21 extends out of the second connecting hole 131.

[0057] In this embodiment, the pentaprism 41 and roof prism 42 are first mounted on corresponding prism brackets 5, which are then connected to the side walls of the rotating block 2. The drive assembly 3 is then used to drive the prism 4 to switch positions, thereby achieving electrically driven free switching of the pentaprism 41 and roof prism 42 in the optical system. Alternatively, manual switching of the prism 4 can be achieved by rotating the manual knob 6, which in turn drives the rotating block 2 and prism 4 to rotate.

[0058] Note that the above are only preferred embodiments of the present disclosure and the technical principles used. Those skilled in the art will understand that the present disclosure is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present disclosure. Therefore, although the present disclosure has been described in more detail through the above embodiments, the present disclosure is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present disclosure, and the scope of the present disclosure is determined by the scope of the appended claims.

Claims

1. A prism switching mechanism, characterized in that: include: Housing assembly (1); A rotating block (2) rotatably connected to the housing assembly (1), wherein the rotating block (2) is provided with a plurality of prisms (4) in a circumferential direction along its rotation axis; A driving component (3) is drivably connected to the rotating block (2), and the driving component (3) is used to drive the rotating block (2) to rotate so that the positions of the plurality of prisms (4) are switched in the horizontal direction.

2. The prism switching mechanism according to claim 1, characterized in that: The housing assembly (1) comprises a base (11) and a supporting cross bar (12), wherein the supporting cross bar (12) is connected to the inner wall of the base (11), and the rotating block (2) is provided with a first shaft portion (21) and a second shaft portion (22) at two ends in a vertical direction, respectively, and the supporting cross bar (12) is provided with a first connecting hole (125), wherein the first shaft portion (21) is rotatably connected to the first connecting hole (125), and the second shaft portion (22) is rotatably connected to the base (11).

3. The prism switching mechanism according to claim 2, characterized in that: The driving assembly (3) comprises a bracket (31), a motor (32), a first gear (33) and a second gear (34); the first shaft portion (21) is inserted into the first connecting hole (125), and the first gear (33) is installed at the portion of the first shaft portion (21) extending out of the first connecting hole (125); the bracket (31) is installed in the base (11), the motor (32) is installed on the bracket (31), and the output end of the motor (32) is installed with a second gear (34), and the second gear (34) can be drivably connected to the first gear (33).

4. The prism switching mechanism according to claim 3, characterized in that: The driving assembly (3) further comprises a third gear (35), wherein the third gear (35) is rotatably connected to the bracket (31), and the third gear (35) is meshedly connected to the first gear (33) and the second gear (34) respectively.

5. The prism switching mechanism according to claim 2, characterized in that: The rotating block (2) is provided with two prisms (4) in the circumferential direction along its rotating axis. The two prisms (4) are arranged on both sides of the rotating block (2). One of the two prisms (4) is a pentaprism (41) and the other is a roof prism (42).

6. The prism switching mechanism according to claim 5, characterized in that: The two ends of the support cross bar (12) are respectively provided with a first limiting portion (121) and a second limiting portion (122); the rotating block (2) is provided with an abutting portion (23); when the rotating block (2) rotates forwardly relative to the support cross bar (12) to a first position, one side of the abutting portion (23) abuts against the first limiting portion (121); when the rotating block (2) rotates backwardly relative to the support cross bar (12) to a second position, the other side of the abutting portion (23) abuts against the second limiting portion (122).

7. The prism switching mechanism according to claim 6, characterized in that: One or both of the first limiting portion (121) and the second limiting portion (122) are threadedly connected to an adjusting threaded rod (123), and the abutting portion (23) can abut against an end surface of the adjusting threaded rod (123).

8. The prism switching mechanism according to claim 7, characterized in that: The abutting portion (23) is provided with a first installation groove (24), a magnet (124) is provided in the first installation groove (24), the adjusting threaded rod (123) is a magnetic component, and the magnet (124) can be magnetically attracted to the adjusting threaded rod (123).

9. The prism switching mechanism according to claim 1, characterized in that: It also comprises a plurality of prism brackets (5), wherein the plurality of prism brackets (5) correspond one-to-one to the plurality of prisms (4), each of the prisms (4) is mounted on one of the prism brackets (5), and the prism brackets (5) are detachably connected to the side wall of the rotating block (2).

10. The prism switching mechanism according to claim 9, characterized in that: The prism bracket (5) is capable of being adjusted in pitch relative to the rotating block (2); and / or The prism bracket (5) can be adjusted in height relative to the rotating block (2).

11. The prism switching mechanism according to claim 2, characterized in that: The housing assembly (1) further comprises an upper cover (13), wherein the upper cover (13) is detachably connected to the base (11), and the upper cover (13) is provided with a second connecting hole (131), the first shaft portion (21) is inserted through the first connecting hole (125) and the second connecting hole (131), and a manual knob (6) is installed at the portion where the first shaft portion (21) protrudes from the second connecting hole (131).

12. An ophthalmic surgical microscope, characterized in that: Includes the prism switching mechanism described in any one of claims 1-11.

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