A speculum for proton heavy ion therapy

Abstract

The utility model discloses a kind of open eye forceps for proton heavy ion treatment, the open eye forceps include a pair of open eye bar and the open-close mechanism of driving open eye bar open-close, the maximum open-close angle of open-close mechanism is adjustable, and it is adapted with damping component to provide moderate resistance. By adjusting eye opening distance, avoid unnecessary pressure or damage to the eye of patient, to optimize the positioning effect of eye in treatment process. Open-close mechanism includes support arm, two groups of open-close arm, two groups of adjusting arm and adjusting rod, adjusting rod is connected with support arm by thread structure, can accurately adjust open-close angle, and compensate clearance brought by thread wear by damping component. This design effectively improves the opening stability of open eye forceps, applicable to the needs of different patients, ensure the safety in proton heavy ion radiotherapy.

Description

Technical Field

[0001] This utility model relates to a medical device, specifically a proton and heavy ion therapy eyelid opener. Background Technology

[0002] In proton and heavy ion radiotherapy, precise localization of ocular tumors is crucial. Traditional eyelid speculum are mainly used in ophthalmic surgery. They mechanically open the eyelids to expose the surgical field. The opening of the speculum is usually adjusted by rotating an adjustment rod. As the adjustment arm unfolds, it drives the opening and closing arms to open. The eyelid opening distance is at its maximum when the two sets of adjustment arms are parallel at 180°. Due to the lack of a limiting structure, medical staff may over-adjust during adjustment. That is, when the adjustment arm has reached the maximum adjustment angle, continuing to rotate the adjustment rod will cause the eyelid opening distance to decrease instead of increase.

[0003] Utility model patent CN216824521U discloses an eyelid speculum. Its opening and closing mechanism changes the opening and closing distance of the eyelid speculum rod by rotating an adjusting rod. During the unfolding of the adjusting arm, the opening and closing arm is driven to open. Similarly, when the two sets of adjusting arms are unfolded parallel at 180°, the eyelid speculum rod has the maximum opening distance, which is locked by a limiting part. It has applications with multiple eyelid opening distances (15mm, 20mm, or 25mm), but lacks an adjustable function. Therefore, three different lengths of adjusting arms are required, and a single specification of eyelid speculum cannot simultaneously meet the needs of different patients and surgical procedures. Furthermore, the threaded adjusting rod and support arm experience wear over long-term use, resulting in gaps in the threaded connection structure and loosening. This causes slight wobbling of the adjusting rod and arm, affecting the positioning accuracy of the eyelid speculum rod, necessitating replacement and increasing surgical costs.

[0004] Therefore, there is an urgent need to design a proton and heavy ion therapy eyelid opener that can meet the requirements for use in ophthalmic proton and heavy ion radiotherapy surgery. Utility Model Content

[0005] The purpose of this invention is to provide a proton and heavy ion therapy eyelid opener that can ensure the safe opening of the eyelids by precisely controlling the opening distance and providing appropriate resistance during ophthalmic proton and heavy ion radiotherapy, thereby avoiding unnecessary pressure or damage to the patient's eyes and optimizing eye positioning and treatment effect during the treatment process.

[0006] The technical solution adopted by this utility model to solve the above problems is: a proton and heavy ion therapy eyelid opener, including a pair of eyelid opener rods and an opening and closing mechanism for driving the eyelid opener rods to open and close. The maximum opening and closing angle of the opening and closing mechanism is adjustable, and it is equipped with a damping component that generates resistance when the eyelid opener rods open outward. The opening and closing mechanism includes a support arm, two sets of opening and closing arms, two sets of adjusting arms, and an adjusting rod. Each end of the support arm is hinged to a set of opening and closing arms. One end of each of the two sets of adjusting arms is slidably and lockably hinged to a set of opening and closing arms on the corresponding side. The adjusting rod is threaded through the middle of the support arm perpendicularly. The end of the adjusting rod is rotatably provided with a hinge seat. The end of the adjusting arm away from the closing arm is hinged to the hinge seat. The head of the adjusting rod is provided with an adjusting head for driving the adjusting rod to rotate and move it relative to the support arm. A limiting ring is sleeved on the adjusting rod, and the limiting ring is used to fix the maximum opening and closing angle of the opening and closing mechanism.

[0007] Preferably, the eyelid opening rod and the opening / closing arm are hinged together and fixed in position by fasteners.

[0008] Preferably, the damping component is a tension spring, and the two ends of the tension spring are respectively connected to the end of a set of adjusting arms on the corresponding side near the opening and closing arm.

[0009] Preferably, the opening and closing arm is provided with a sliding groove, and a sliding seat is slidably provided in the sliding groove. The adjusting arm is hinged to the sliding seat. The sliding seat is also provided with a locking bolt for fixing its position relative to the sliding groove. The locking bolt is threadedly connected to the upper part of the slider. A base plate is provided below the slider. The locking bolt is rotated and tightened to press and fit against the upper surface of the opening and closing arm. The base plate is pressed and fit against the lower surface of the opening and closing arm.

[0010] Preferably, one side of the opening and closing arm has scale lines arranged along the slide groove direction, and one side of the base plate has a triangular arrow protrusion.

[0011] Preferably, an elastic rubber pad is provided between the locking bolt and the upper surface of the opening and closing arm.

[0012] Compared with the prior art, this utility model has the following advantages and effects: This invention features an adjustable maximum opening angle for its opening mechanism, catering to the clinical needs of different patients. It also allows for a fixed and adjustable maximum eyelid opening distance, ensuring the eyelid rod opens safely during proton and heavy ion radiotherapy and preventing damage to the patient's eyes. Furthermore, the opening mechanism incorporates a damping component to mitigate resistance when the eyelid rod opens outwards. The spiral-type telescopic adjustment mechanism compensates for gaps caused by thread wear during adjustment, resulting in a more stable position of the eyelid rod and effectively maintaining the eyelid opening distance. This optimizes eye positioning and treatment outcomes during the procedure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a proton and heavy ion therapy eyelid opener according to an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the opening and closing mechanism of an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the connection structure between the eyelid opening rod and the opening and closing mechanism in an embodiment of this utility model.

[0016] Figure 4 This is a partial structural schematic diagram of the sliding groove of the opening and closing mechanism in an embodiment of this utility model.

[0017] Figure numbers: 11. Opening rod, 12. Opening and closing mechanism, 13. Damping component, 14. Support arm, 15. Opening and closing arm, 16. Adjusting arm, 17. Adjusting rod, 18. Hinge seat, 19. Adjusting head, 20. Limiting ring, 21. Fastener, 22. Angle scale, 23. Slide groove, 24. Slide seat, 25. Locking bolt, 26. Base plate, 27. Elastic pad, 28. Scale line, 29. Triangular arrow protrusion. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0019] Example:

[0020] See Figure 1 This embodiment relates to a proton and heavy ion therapy eyelid opener, specifically used in ophthalmic proton and heavy ion radiotherapy to precisely control the eye opening distance to expose the target area of ​​the eye, ensuring accurate eye positioning and avoiding unnecessary eyelid damage, thereby improving the safety of the treatment. Specifically, it includes a pair of eyelid opening rods 11 and an opening and closing mechanism 12 that drives the eyelid opening rods 11 to open and close. The maximum opening and closing angle of the opening and closing mechanism 12 is adjustable, and it is equipped with a damping component 13 that generates resistance when the eyelid opening rods 11 open outwards.

[0021] Specifically, in this embodiment, the opening and closing mechanism 12 of this invention is provided with a maximum opening and closing angle, which can limit the eye opening distance of the eyelid opening rod 11 and avoid damage caused by excessive adjustment leading to overstretching of the patient's eyelids. Furthermore, the maximum opening and closing angle of the opening and closing mechanism 12 in this embodiment is adjustable, so the eye opening distance of the eyelid opening rod 11 can be adapted to the needs of different patients. According to clinical experience, the maximum eye opening distance of the eyelid opening rod 11 is 10mm to 30mm. This embodiment also provides a damping component 13 in the opening and closing mechanism 12, so that when medical personnel operate the opening and closing mechanism 12 to unfold the eyelid opening rod 11, a resistance opposite to the adjustment direction is formed, causing the eyelid opening rods 11 to tend to move closer together. The resistance generated by the damping component 13 can compensate for the gap caused by thread wear during adjustment of the opening and closing mechanism 12, ensuring a more stable fixation of the eyelid opening rod 11, thereby effectively maintaining the eyelid opening distance after the eyelid opening device is fixed.

[0022] See Figure 2 The opening and closing mechanism 12 includes a support arm 14, two sets of opening and closing arms 15, two sets of adjusting arms 16, and an adjusting rod 17. Each end of the support arm 14 is hinged to a set of opening and closing arms 15. One end of each of the two sets of adjusting arms 16 is slidably and lockably hinged to a set of opening and closing arms 15 on the corresponding side. The adjusting rod 17 is threaded through the middle of the support arm 14 perpendicularly. The end of the adjusting rod 17 is rotatably provided with a hinge seat 18. The end of the adjusting arm 16 away from the opening and closing arms 15 is hinged to the hinge seat 18. The head of the adjusting rod 17 is provided with an adjusting head 19 for driving the adjusting rod 17 to rotate and move it relative to the support arm 14. The adjusting head 19 is provided with a knurled structure to increase friction. The adjusting rod 17 is driven to rotate by the adjusting head 19. Under the threaded engagement structure between the adjusting rod 17 and the support arm 14, the hinge seat 18 can move back and forth relative to the support arm 14 along the axis of the adjusting rod 17. The two ends of the adjusting arm 16 are respectively hinged to the hinge seat 18 and the opening and closing arm 15 on the corresponding side. The movement of the hinge seat 18 can drive the adjusting arm 16 to swing, thereby causing the opening and closing arm 15 hinged to the support arm 14 to open or close.

[0023] In this embodiment, a limiting ring 20 is fitted onto the adjusting rod 17 to limit the extension and retraction distance of the adjusting rod 17 relative to the support arm 14, thereby fixing the maximum opening and closing angle of the opening and closing mechanism 12. By setting the limiting ring 20 at different positions on the adjusting rod 17, different maximum opening and closing angles are fixed accordingly, suitable for opening eyes of different sizes, and the angle is fixed each time, improving the repeatability of the eyelid opening angle. The limiting ring 20 is threadedly fitted to the adjusting rod 17, and the relative position of the limiting ring 20 and the adjusting rod 17 can be adjusted by rotation, which can also change the maximum opening and closing angle of the opening and closing mechanism 12.

[0024] See Figure 3In this embodiment, the opening and closing mechanism 12 and the eyelid opening rod 11 are inclined, and the angle between them is adjustable. During use, the opening and closing mechanism 12 can be fixed to the patient's nasal side. Specifically, the eyelid opening rod 11 and the opening and closing arm 15 are hinged together and fixed in position by fasteners 21. To improve the safety of clinical operation when using the eyelid opener, the angle between the patient's nasal side and the horizontal plane of the affected eye's skin must be measured before surgery. By rotating and loosening the fasteners 21, the angle between the eyelid opening rod 11 and the opening and closing arm 15 can be adjusted to correspond to the previously measured angle. An angle scale 22 can also be set circumferentially at the junction to make the adjustment process more intuitive.

[0025] See Figure 4 The damping component 13 is a tension spring, with both ends of the spring connected to the ends of a set of adjusting arms 16 on the corresponding sides near the opening / closing arm 15. Under the tension of the spring, the two sets of adjusting arms 16 are pulled together with their connected ends, and the other end of the adjusting arm 16 generates a thrust that pushes the hinge seat 18 toward the support arm 14. This thrust generates a component force along the axial direction of the adjusting rod 17. Under the action of this component force, the fitting clearance caused by the wear of the threaded connection structure between the adjusting rod 17 and the support arm 14 can be compensated.

[0026] In this embodiment, the adjusting arm 16 and the opening / closing arm 15 are slidably hinged, and the hinge position can be locked. Specifically, the opening / closing arm 15 is provided with a slide groove 23, and a slide seat 24 is slidably mounted on the slide groove 23. The adjusting arm 16 is hinged to the slide seat 24. The slide seat 24 is also provided with a locking bolt 25 for fixing its position relative to the slide groove 23. The locking bolt 25 is threadedly connected to the upper part of the slider, and a base plate 26 is provided below the slider. The locking bolt 25 is rotated and tightened to press and fix it against the upper surface of the opening / closing arm 15, and the base plate 26 is pressed and fixed against the lower surface of the opening / closing arm 15. The length of the slide groove 23 corresponds to the adjustment range of the maximum opening distance. The maximum opening distance is determined by the fixed position of the slide seat 24 relative to the slide groove 23 (the hinge position between the adjusting arm 16 and the opening / closing arm 15).

[0027] Each time the locking bolt 25 is rotated and tightened, it exerts pressure on the upper surface of the opening and closing arm 15. Over time, this can cause indentations on the upper surface of the opening and closing arm 15, which is not conducive to the locking and positioning of the slide block 24. In this embodiment, an elastic rubber pad 27 is also provided between the locking bolt 25 and the upper surface of the opening and closing arm 15. This not only avoids the indentation defect on the upper surface of the opening and closing arm 15, but also increases the anti-slip effect after compression, making the fixed position of the slide block 24 more stable.

[0028] In this embodiment, a visual design is incorporated to facilitate adjustment of the maximum eyelid opening distance by medical staff. Specifically, a scale line 28 is arranged along the slide groove 23 on one side of the opening arm 15. The total adjustment stroke of the scale line 28 is 20mm, and it is divided into 20 small scales at equal intervals, i.e., the accuracy is 1mm. The smallest adjustment scale value is 10mm, and the largest adjustment scale value is 30mm. A triangular arrow protrusion 29 is provided on one side of the base plate 26. The triangular arrow protrusion 29 can indicate the current adjustment value of the maximum eyelid opening distance.

[0029] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A proton and heavy ion therapy eyelid opener, characterized in that: The device includes a pair of eyelid-opening rods and an opening and closing mechanism for driving the eyelid-opening rods to open and close. The maximum opening and closing angle of the opening and closing mechanism is adjustable, and it is equipped with a damping component that generates resistance when the eyelid-opening rods open outward. The opening and closing mechanism includes a support arm, two sets of opening and closing arms, two sets of adjusting arms, and an adjusting rod. Each end of the support arm is hinged to a set of opening and closing arms. One end of each of the two sets of adjusting arms is slidably and lockably hinged to a set of opening and closing arms on the corresponding side. The adjusting rod is threaded through the middle of the support arm and has a hinge seat rotatably mounted at its end. The end of the adjusting arm furthest from the opening and closing arm is hinged to the hinge seat. The head of the adjusting rod is provided with an adjusting head for driving the adjusting rod to rotate and move it relative to the support arm. A limiting ring is fitted on the adjusting rod to fix the maximum opening and closing angle of the opening and closing mechanism.

2. The eyelid opener for proton and heavy ion therapy according to claim 1, characterized in that: The eyelid opening rod and the opening and closing arm are hinged together and fixed in position by fasteners.

3. The eyelid opener for proton and heavy ion therapy according to claim 1, characterized in that: The damping component is a tension spring, and the two ends of the tension spring are respectively connected to the end of a set of adjusting arms on the corresponding side near the opening and closing arm.

4. The eyelid opener for proton and heavy ion therapy according to claim 1, characterized in that: The opening and closing arm is provided with a sliding groove, and a sliding seat is slidably provided in the sliding groove. The adjusting arm is hinged to the sliding seat. The sliding seat is also provided with a locking bolt for fixing its position relative to the sliding groove. The locking bolt is threadedly connected to the upper part of the slider. A base plate is provided below the slider. The locking bolt is rotated and tightened to press and fit against the upper surface of the opening and closing arm. The base plate is pressed and fit against the lower surface of the opening and closing arm.

5. The eyelid opener for proton and heavy ion therapy according to claim 4, characterized in that: The opening and closing arm has scale lines arranged along the slide groove on one side, and a triangular arrow protrusion is provided on one side of the base plate.

6. The eyelid opener for proton and heavy ion therapy according to claim 4, characterized in that: An elastic rubber pad is also provided between the locking bolt and the upper surface of the opening and closing arm.

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