Eye speculum

Abstract

The invention discloses an eye speculum which comprises a first shell and a second shell. A first fixing shaft is rotationally connected to the interior of the first shell through a bearing, the first fixing shaft is fixedly connected with the gear, and a first rack and a second rack are connected to the two sides of the gear in a meshed mode; the first finger pressing sheet is fixedly connected with the first rack; the second rack is fixedly connected with the second finger pressing sheet; the first spring is fixedly connected between the first finger pressing sheet and the second finger pressing sheet. According to the eyelid opener, the function of fixing the distraction rod is added, it is guaranteed that the eyelids can be stably kept in the distraction state in the using process, the stability of the eye surgery operation visual field is greatly guaranteed, a part convenient for fingers to press is designed, medical workers can easily apply force in the operation process, finger fatigue is avoided, and the medical workers can conveniently use the eyelid opener. And an arc fitting the eyes is designed at the eye supporting part, so that excessive compression on eye tissues is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of eyelid retractors, and specifically to an eyelid retractor. Background Art

[0002] An eyelid retractor is a medical device that is mainly used in ophthalmic surgeries and examinations. It can hold the eyelids open to ensure a clear surgical field, or facilitate operations such as examinations. It also helps doctors to smoothly examine patients who cannot cooperate by opening their eyes independently.

[0003] Most of the existing eyelid retractors have the following disadvantages:

[0004] Lack of a fixing function for the retracting rod after retraction, which may cause the retracting rod to displace during the surgery or examination, affecting the stability and accuracy of the operation.

[0005] There is no convenient part for finger pressing, which makes it inconvenient for medical staff to operate during use, reducing work efficiency and may also affect the precision of the operation.

[0006] The part for holding the eyes is not provided with an arc that fits the eyes, which is likely to cause discomfort or even damage to the eyes, cannot well adapt to the physiological structure of the eyes, and affects the patient experience. Therefore, we propose a fixable eyelid retractor. Summary of the Invention

[0007] The purpose of the present invention is to provide an eyelid retractor to solve the problem of the lack of a fixing function for the retracting rod after retraction in the above-mentioned background art, which may cause the retracting rod to displace during the surgery or examination, affecting the stability and accuracy of the operation.

[0008] To achieve the above purpose, the present invention provides the following technical solution: An eyelid retractor, comprising:

[0009] A first housing;

[0010] A gear, a first fixed shaft is rotatably connected to the inside of the first housing through a bearing, the first fixed shaft is fixedly connected with the gear, and the two sides of the gear are meshed with a first rack and a second rack;

[0011] A first finger pressing piece, the first finger pressing piece is fixedly connected with the first rack;

[0012] A second finger pressing piece, the second rack is fixedly connected with the second finger pressing piece;

[0013] A first spring, a first spring is fixedly connected between the first finger pressing piece and the second finger pressing piece.

[0014] Preferably, a second fixed shaft is fixedly connected inside the first shell, the second fixed shaft is rotatably connected to a pawl through a bearing, the pawl is fixedly connected to an incomplete gear, a ratchet is fixedly connected above the gear, the ratchet is on one side of the pawl and parallel to an axis.

[0015] Preferably, the second shell is fixedly connected to the first shell, and a self-locking switch is provided at the top of the second shell, and a cylindrical slot plate is designed below the self-locking switch, and the cylindrical slot plate is fixedly connected to the second shell, and the cylindrical slot plate is provided with card slots and limit slots distributed in a ring array, and the card slots and limit slots are arranged alternately in sequence, and the self-locking switch is fixedly connected to a pressure shaft, and the pressure shafts are also distributed in a ring array at the upper ends of each card slot and limit slot, and a rotating column is designed below the cylindrical slot plate, and sliding shafts distributed in a ring array are provided around the rotating column, and the sliding shaft is slidably connected in the card slot, and a second spring is designed below the rotating column, and the second spring is fixedly connected to the second shell, and the rotating column is fixedly connected to a transmission shaft, and spline teeth are designed on the transmission shaft, and the spline teeth are parallel to the incomplete gear on an axis and meshed with the incomplete gear.

[0016] Preferably, the first finger pressure sheet and the second finger pressure sheet are fixedly connected with a spreading rod, and arc-shaped supporting rods are fixedly connected at both ends of the spreading rod.

[0017] Preferably, four limiting shafts are fixedly connected to the interior of the first shell, and the limiting shafts are respectively arranged at the top ends of both sides of the first rack and the second rack.

[0018] Preferably, a first slide rail and a second slide rail are provided below the first rack and the second rack, and the first rack and the second rack are slidably connected to the first slide rail and the second slide rail below through a sliding block.

[0019] Preferably, an inclined surface is provided at the upper end of the sliding shaft, and an inclined surface is also provided below the limiting groove, and the inclined surfaces of the sliding shaft and the limiting groove are parallel to each other.

[0020] Compared with the prior art, the beneficial effect of the present invention is that the eyelid opener is provided with an additional opening rod fixing function, which ensures that the eyelid can be stably kept in an open state during use, thus greatly guaranteeing the stability of the visual field during eye surgery.

[0021] Secondly, the design allows for easy finger pressing, allowing medical staff to easily apply force during operation, avoiding finger fatigue and improving the comfort and efficiency of operation. Finally, the eye-supporting part is designed with an arc shape that fits the eyes, effectively avoiding excessive pressure on the eye tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the first shell of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the second shell of the present invention;

[0025] Figure 4 This is a schematic diagram of the detailed internal structure of the first shell of the present invention;

[0026] In the figure: 1. arc-shaped support rod; 2. opening rod; 3. second finger pressure piece; 4. first finger pressure piece; 5. first spring; 6. first rack; 7. first slide rail; 8. second fixed shaft; 9. incomplete gear; 10. pawl; 11. second rack; 12. second slide rail; 13. self-locking switch; 14. gear; 15. ratchet; 16. first fixed shaft; 17. spline teeth; 18. transmission shaft; 19. limit shaft; 20. second housing; 21. first housing; 22. slot; 23. pressure shaft; 24. slide shaft; 25. limit slot; 26. rotating column; 27. second spring; 30. cylindrical slot plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1-3 The present invention provides a technical solution: an eyelid opener, comprising:

[0029] A first housing 21;

[0030] Gear 14, the first housing 21 is rotatably connected with a first fixed shaft 16 via a bearing, the first fixed shaft 16 is fixedly connected with the gear 14, the bearing can play a fixing role and can also make the gear 14 rotate, the first rack 6 and the second rack 11 are meshed and connected on both sides of the gear 14;

[0031] A first finger pressing sheet 4, wherein the first finger pressing sheet 4 is fixedly connected to the first rack 6;

[0032] A second finger-pressing sheet 3, to which the second rack 11 is fixedly connected, and when the finger-pressing sheet is pressed, the internal structure including the gear 14 and the rack can be driven;

[0033] The first spring 5 is fixedly connected between the first finger pressing piece 4 and the second finger pressing piece 3. When the finger pressing the finger pressing piece is released, the first spring 5 can give an outward stretching force to allow the support rod 2 to open automatically.

[0034] A second fixed shaft 8 is fixedly connected inside the first shell 21, and the second fixed shaft 8 is rotatably connected to a pawl 10 through a bearing. The pawl 10 is fixedly connected to an incomplete gear 9. Similarly, the bearing here also plays a role of fixing and allowing the pawl 10 and the incomplete gear 9 to rotate. A ratchet 15 is fixedly connected above the gear 14. The ratchet 15 is on one side of the pawl 10 and parallel to an axis, so as to facilitate the mutual cooperation between the pawl 10 and the ratchet 15.

[0035] The second shell 20 is fixedly connected to the first shell 21, and a self-locking switch 13 is arranged at the top of the second shell 20. A cylindrical slot plate 30 is designed below the self-locking switch 13. The cylindrical slot plate 30 is fixedly connected to the second shell 21. The cylindrical slot plate 30 is provided with card slots 22 and limit slots 25 distributed in an annular array, and the card slots 22 and the limit slots 25 are arranged alternately in sequence. The self-locking switch 13 is fixedly connected to a pressure shaft 23, and the pressure shaft 23 is also distributed in an annular array at the upper ends of each card slot 22 and the limit slot 25. In the process of applying downward pressure, it will be better stressed. A rotating column 26 is designed below the cylindrical slot plate 30. The rotating column 26 is surrounded by sliding shafts 34 distributed in a circular array, and the sliding shafts 34 are slidably connected in the slot 22. A second spring 27 is designed under the rotating column 26. The second spring 27 serves to give an upward thrust to the rotating column 26 and the sliding shaft. The second spring 27 is fixedly connected to the second shell 20 to provide a force point for the spring. The rotating column 26 is fixedly connected to the transmission shaft 18, and the transmission shaft 18 is designed with spline teeth 17. The spline teeth 17 are parallel to the incomplete gear 9 on an axis and are meshed with the incomplete gear 9. Because the transmission shaft 18 moves in a straight line, the spline teeth 17 can cooperate with the incomplete gear 9, thereby driving the ratchet 10 to rotate.

[0036] The first finger pressure sheet 4 and the second finger pressure sheet 3 are fixedly connected with a spreading rod 2, and arc-shaped support rods 1 are fixedly connected at both ends of the spreading rod. The finger pressure sheet is convenient for finger pressing, allowing medical staff to easily apply force during operation and avoiding finger fatigue.

[0037] Four limit shafts 19 are fixedly connected to the inside of the first shell 21. The limit shafts 19 are respectively designed at the top ends of both sides of the first rack 6 and the second rack 11. The limit shafts 19 limit the movement of the first rack 6 and the second rack 11, and reduce the sound caused by the rack movement reaching the top end.

[0038] A first slide rail 7 and a second slide rail 12 are provided below the first rack 6 and the second rack 11. The first rack 6 and the second rack 11 are slidably connected to the first slide rail 7 and the second slide rail 12 below through a slider to fix the position and movement direction of the two racks.

[0039] The upper end of the sliding shaft 24 is provided with an inclined surface, and the lower end of the limiting groove 25 is also provided with an inclined surface, and the inclined surfaces of the sliding shaft 24 and the limiting groove 25 are parallel to each other, so that the sliding shaft 24 can slide into the limiting groove 25 and the card slot easily.

[0040] Compared with the prior art, the beneficial effect of the present invention is that the eyelid opener is provided with an additional opening rod fixing function, which ensures that the eyelid can be stably kept in an open state during use, thus greatly guaranteeing the stability of the visual field during eye surgery.

[0041] Working principle: When in use, the finger pressure pieces 3 and 4 at both ends are pressed inwardly by fingers, so that the first spring 5 is compressed under the influence of force, driving the spread rod 2 and the arc-shaped support rod 1 to retract inwardly. At this moment, the arc-shaped support rod 1 at the front end is placed at the appropriate position of the upper and lower eyelids, and the fingers slowly release the finger pressure pieces 3 and 4. At this moment, the first spring 5 gradually expands outward due to the reduction of the pressing force, thereby driving the spread rod 2 and the arc-shaped support rod 1 to extend outward again until they reach the appropriate position, and the self-locking switch 13 can be pressed. At this moment, the pressure shaft 23 applies pressure downward to push the sliding shaft 24, so that the sliding shaft 24 is out of the restraining range of the card slot 22. At this moment, because the sliding shaft 24 is fixedly connected to the rotating column 26, the second spring 27 under the rotating column 26 is also compressed. Because the rotating column 26 is fixedly connected to the transmission shaft 18, the flower on the transmission shaft 18 is driven. The key teeth 17 mesh with the incomplete gear 9 for transmission. The incomplete gear 9 drives the pawl 10 below while rotating. When the pawl 10 rotates to a certain position, it will be stuck in the teeth of the ratchet 15, forcing the ratchet 15 to stop rotating. The gear 14, the first rack 6 and the second rack 11 are also stopped. When the finger pressing the self-locking switch 13 leaves, the force of the second spring 27 pushes the rotating column 26 upward, causing the sliding shaft 24 to enter the limiting groove 25 to complete the self-locking. In this way, the fixation of the arc support rod 1 and the spreading rod 2 during use is achieved. Similarly, the self-locking switch 13 is pressed again, and the sliding shaft 24 will be pushed out of the limiting groove 25 by the pressure shaft 23. The second spring 27 pushes the rotating column 26 upward, causing the sliding shaft 24 to enter the card slot 22. The transmission shaft 18 contracts inward at this time, and the pawl 10 leaves the tooth gap of the ratchet 15 at this moment, thus canceling the self-locking restriction. The whole process control is convenient and practical, ensuring that the eyelids can remain stably open during use, thus guaranteeing the stability of the visual field during eye examination operations.

[0042] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lid opener, characterized in that: include: A first housing (21); A gear (14), wherein the first housing (21) is rotatably connected to a first fixed shaft (16) via a bearing, the first fixed shaft (16) is fixedly connected to a gear (14), and the first rack (6) and the second rack (11) are meshingly connected on both sides of the gear (14); A first finger pressing sheet (4), wherein the first finger pressing sheet (4) is fixedly connected to the first rack (6); A second finger-pressing sheet (3), the second rack (11) being fixedly connected to the second finger-pressing sheet (3); A first spring (5), wherein the first finger pressing piece (4) and the second finger pressing piece (3) are fixedly connected with the first spring (5).

2. The eyelid opener according to claim 1, characterized in that: The first housing (21) is fixedly connected to the second housing (20); a second fixed shaft (8) is fixedly connected inside the first housing (21); the second fixed shaft (8) is rotatably connected to a pawl (10) via a bearing; the pawl (10) is fixedly connected to an incomplete gear (9); a ratchet (15) is fixedly connected above the gear (14); the ratchet (15) is on one side of the pawl (10) and is parallel to an axis.

3. The eyelid opener according to claim 2, characterized in that: A self-locking switch (13) is arranged at the top of the second housing (20), and a cylindrical slot plate (30) is designed below the self-locking switch (13). The cylindrical slot plate (30) is fixedly connected to the second housing (20), and the cylindrical slot plate (30) is provided with a card slot (22) and a limit slot (25) distributed in an annular array, and the card slot (22) and the limit slot (25) are arranged alternately in sequence. The self-locking switch (13) is fixedly connected to a pressure shaft (23), and the pressure shaft (23) is also distributed in an annular array at the upper end of each card slot (22) and the limit slot (25). A rotating column (26) is designed below the cylindrical groove plate (30), and sliding shafts (24) distributed in a ring array are arranged around the rotating column (26). The sliding shafts (24) are slidably connected in the slot (22). A second spring (27) is designed below the rotating column (26), and the second spring (27) is fixedly connected to the second housing (20). The rotating column (26) is fixedly connected to a transmission shaft (18), and a spline tooth (17) is designed on the transmission shaft (18). The spline tooth (17) is parallel to the incomplete gear (9) on an axis and is meshed with the incomplete gear.

4. The eyelid opener according to claim 1, characterized in that: The first finger pressure sheet (4) and the second finger pressure sheet (3) are fixedly connected to a spreading rod (2), and arc-shaped support rods (1) are fixedly connected to both ends of the spreading rod (2).

5. The eyelid opener according to claim 1, characterized in that: Four limiting shafts (19) are fixedly connected inside the first housing (21), and the limiting shafts (19) are respectively designed at the top ends of both sides of the first rack (6) and the second rack (11).

6. The eyelid opener according to claim 1, characterized in that: A first slide rail (7) and a second slide rail (12) are arranged below the first rack (6) and the second rack (11); the first rack (6) and the second rack (11) are slidably connected to the first slide rail (7) and the second slide rail below via a sliding block.

7. The eyelid opener according to claim 3, characterized in that: The upper end of the sliding shaft (24) is provided with an inclined surface, and the lower end of the limiting groove (25) is also provided with an inclined surface, and the inclined surfaces of the sliding shaft (24) and the limiting groove (25) are parallel to each other.

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