Lacrimal sac scissors

Abstract

The utility model provides a pair of lacrimal sac scissors, relates to the technical field of lacrimal sac scissors, and solves the problem that a special lacrimal sac shearing instrument does not exist in the prior art. The mounting cylinder is connected with an outer cylinder, a transmission rod is movably arranged in the outer cylinder, a blocking piece is arranged at one end of the transmission rod, the bottom of the mounting cylinder is connected with a mounting block, the mounting block is fixedly connected with a fixed grip, a movable grip is hinged to the mounting block, and a U-shaped shifting piece is arranged at the top of the movable grip; a movable blade is hinged to the end, away from the mounting barrel, of the outer barrel, a through hole is formed in the end of the movable blade, a fixed blade is fixedly arranged on the outer barrel, and the fixed blade and the movable blade are arranged in a deflection mode along the axis of the outer barrel. The transmission rod is driven to move axially through rotation of the movable grip, so that the movable blade is driven to rotate to be matched with the fixed blade for shearing, the movable blade and the fixed blade warp upwards by a certain angle along the axis of the outer barrel, and the lacrimal sac is conveniently sheared.

Description

Technical Field

[0001] The utility model relates to the technical field of lacrimal sac scissors, in particular to a pair of lacrimal sac scissors. Background Art

[0002] Chronic dacryocystitis and nasolacrimal duct obstruction are common ophthalmic diseases. Long-term epiphora and pus discharge affect the life and work of patients. With the continuous advancement of endoscopic nasal surgery, endoscopic dacryocystostomy has gradually replaced the traditional extranasal dacryocystostomy and is used in clinical practice. When performing endoscopic dacryocystostomy, it is important to fully expose the lacrimal sac, but on this basis, cutting the lacrimal sac and making a suitable lacrimal sac mucosal flap and flipping it back to fix it are the keys to the success of the operation.

[0003] At present, there is no special cutting instrument for the lacrimal sac. The surgeon often needs to bend the empty needle during the operation to make it by himself, but the cutting efficiency is not good enough, and it is difficult to successfully cut the lacrimal sac in one go. Alternatively, a sickle hook knife or a myringotomy knife is used instead, because the lacrimal sac is located in the nasal projection point of the maxillary frontal process, and it is at an angle of about 30° with the anterior nares. It is difficult to cut the lacrimal sac smoothly with a knife without an angle, and it is very likely to tear the lacrimal sac, resulting in failure in the production of the lacrimal sac mucosal flap. In addition, when turning over the lacrimal sac mucosal flap, the two ends of the lacrimal sac need to be cut open. Sometimes, skull base scissors or vascular scissors are used instead, but still because of the angle problem and for the protection of delicate instruments, this is obviously a bad use and waste of resources. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a lacrimal sac scissors, which drives the transmission rod to move axially through the rotation of the movable handle, thereby driving the movable blade to rotate and cooperate with the fixed blade for shearing, and the movable blade and the fixed blade are tilted up at a certain angle along the axis of the outer cylinder to facilitate shearing of the lacrimal sac.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A lacrimal sac scissors comprises a mounting tube, one end of the mounting tube is connected to an outer tube, a transmission rod is movably arranged in the outer tube, a baffle is arranged at one end of the transmission rod close to the mounting tube, a mounting block is connected to the bottom of the mounting tube, a fixed handle is fixedly connected to the mounting block, a movable handle is hinged on the mounting block, a U-shaped dial is arranged on the top of the movable handle and cooperates with the baffle to drive the transmission rod axially to move, a driving ring is arranged at one end of the transmission rod away from the baffle, a movable blade is hingedly arranged at one end of the outer tube away from the mounting tube, the end of the movable blade movably extends into the outer tube and the end of the movable blade is provided with a through hole that is buckled with the driving ring, the diameter of the through hole is larger than the cross-sectional diameter of the driving ring, a fixed blade that cooperates with the movable blade is fixedly arranged on the outer tube, and the fixed blade and the movable blade are deflected along the axis of the outer tube.

[0007] Preferably, the outer cylinder is movably arranged in the mounting cylinder, and an annular protrusion located inside the mounting cylinder is arranged at the end of the outer cylinder, and an end of the annular protrusion away from the outer cylinder is fixedly connected with a fixing ring movably mounted on the transmission rod and the diameter of the fixing ring is smaller than the diameter of the annular protrusion, and a fixing screw that abuts against the fixing ring is threaded through the mounting cylinder.

[0008] Preferably, a guide groove is provided on the inner wall of the outer cylinder along the length direction, and a sliding block located in the guide groove is fixedly connected to the transmission rod.

[0009] Preferably, a handle is fixedly provided on the outer wall of the outer cylinder.

[0010] Preferably, the end surface of the mounting cylinder close to the fixed blade is provided with angle scale lines arranged along the circumference of the outer cylinder.

[0011] Preferably, the blocking piece is circular.

[0012] Preferably, finger rings are provided on both the fixed handle and the movable handle.

[0013] Preferably, the fixed blade and the movable blade are sharpened on both sides.

[0014] Preferably, the fixed blade and the movable blade form an angle of 30° with the axis of the outer cylinder.

[0015] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0016] The rotation of the movable handle drives the transmission rod to move axially, thereby driving the movable blade to rotate and cooperate with the fixed blade for shearing. The movable blade and the fixed blade are tilted up at a certain angle along the axis of the outer cylinder, which is convenient for shearing the lacrimal sac. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the front cross-sectional structure provided for an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0020] Figure 3 for Figure 1 The enlarged schematic diagram of point B in FIG.

[0021] Figure 4 This is a schematic diagram of a top view of the fixed blade and the movable blade provided in an embodiment of the utility model.

[0022] Icons: 1-fixed blade; 2-movable blade; 3-transmission rod; 4-outer cylinder; 5-handle; 6-mounting cylinder; 7-blocking piece; 8-U-shaped dial; 9-mounting block; 10-fixed grip; 11-movable grip; 12-finger ring; 13-slider; 14-guide groove; 15-drive ring; 16-through hole; 17-annular protrusion; 18-fixing screw; 19-fixing ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0025] Combine the following Figure 1-Figure 4 The utility model is described in detail.

[0026] Example

[0027] A lacrimal sac scissors, such as Figure 1 and 2 As shown, it includes a mounting cylinder 6, one end of which is connected to an outer cylinder 4, a transmission rod 3 is movably arranged in the outer cylinder 4, a baffle 7 is arranged at one end of the transmission rod 3 close to the mounting cylinder 6, a mounting block 9 is connected to the bottom of the mounting cylinder 6, a fixed handle 10 is fixedly connected to the mounting block 9, a movable handle 11 is hinged on the mounting block 9, a U-shaped dial 8 is arranged on the top of the movable handle 11 for cooperating with the baffle 7 to drive the transmission rod 3 axially to move, a driving ring 15 is arranged at one end of the transmission rod 3 away from the baffle 7, a movable blade 2 is hingedly arranged at one end of the outer cylinder 4 away from the mounting cylinder 6, the end of the movable blade 2 is movably extended into the outer cylinder 4 and the end of the movable blade 2 is provided with a through hole 16 that is buckled with the driving ring 15, the diameter of the through hole 16 is larger than the cross-sectional diameter of the driving ring 15, a fixed blade 1 that cooperates with the movable blade 2 is fixedly arranged on the outer cylinder 4, and the fixed blade 1 and the movable blade 2 are deflected along the axis of the outer cylinder 4.

[0028] The transmission rod 3 can move freely in the axial direction in the outer tube 4 and the installation tube 6. When the movable handle 11 is squeezed, the U-shaped puller 8 on the movable handle 11 pushes the baffle 7 outward, thereby moving the transmission rod 3 to the outside of the installation tube 6. The transmission rod 3 pulls the movable blade 2 to rotate through the drive ring 15, and the movable blade 2 cooperates with the fixed blade 1 to shear; conversely, the movable blade 2 is separated from the fixed blade 1 by opening the movable handle 11. The diameter of the through hole 16 is set to be larger than the cross-sectional diameter of the drive ring 15, so that the rotation of the movable blade 2 is not affected when the drive ring 15 moves linearly. A through groove is provided on the end face of the outer tube 4 to facilitate the hinged installation of the movable blade 2 on the outer tube 4. The fixed blade 1 and the movable blade 2 are set to deflect along the axis of the outer tube 4 to adapt to the shearing angle of the lacrimal sac.

[0029] like Figure 3 As shown, the outer cylinder 4 is movably arranged in the mounting cylinder 6, and an annular protrusion 17 located inside the mounting cylinder 6 is arranged at the end of the outer cylinder 4, and an end of the annular protrusion 17 away from the outer cylinder 4 is fixedly connected with a fixing ring 19 movably sleeved on the transmission rod 3, and the diameter of the fixing ring 19 is smaller than the diameter of the annular protrusion 17, and a fixing screw 18 abutting against the fixing ring 19 is threadedly penetrated on the mounting cylinder 6.

[0030] The outer cylinder 4 can rotate in the mounting cylinder 6 to adjust the position and orientation of the movable blade 2 and the fixed blade 1; the annular protrusion 17 prevents the outer cylinder 4 from moving out of the mounting cylinder 6 in the direction of the fixed blade 1, and after the fixed screw 18 extends into the mounting cylinder 6, it can prevent the outer cylinder 4 from moving in the direction of the baffle 7, and the fixed screw 18 abuts against the fixed ring 19, which can fix the rotated outer cylinder 4 to ensure that the rotation angle remains unchanged.

[0031] The inner wall of the outer cylinder 4 is provided with a guide groove 14 along the length direction, and a slider 13 located in the guide groove 14 is fixedly connected to the transmission rod 3. The slider 13 can slide in the guide groove 14 to ensure the normal movement of the transmission rod 3, and the slider 13 can make the outer cylinder 4 and the transmission rod 3 rotate synchronously.

[0032] A handle 5 is fixedly arranged on the outer wall of the outer cylinder 4. The handle 5 is arranged to facilitate the operator to rotate the outer cylinder 4.

[0033] The end surface of the mounting cylinder 6 close to the fixed blade 1 is provided with angle scales arranged along the circumference of the outer cylinder 4 , and the angle scales can cooperate with the handle 5 to indicate the angle, so that the operator can check the specific rotation value of the outer cylinder 4 conveniently.

[0034] The blocking piece 7 is circular, which can ensure that the U-shaped shifting member 8 can still shift the blocking piece 7 after the blocking piece 7 rotates along with the transmission rod 3 .

[0035] Finger rings 12 are provided on both the fixed handle 10 and the movable handle 11 , and the finger rings 12 can facilitate operators to grasp the fixed handle 10 and the movable handle 11 .

[0036] The fixed blade 1 and the movable blade 2 are double-sidedly sharpened (not shown in the figure). The fixed blade 1 and the movable blade 2 perform a shearing operation during the closing process. After closing, the fixed blade 1 and the movable blade 2 can be used as cutting tools.

[0037] like Figure 4 As shown, the fixed blade 1 and the movable blade 2 are tilted upward at an angle of 30° along the axis of the outer tube 4, so as to be suitable for a shearing angle of about 30° of the lacrimal sac.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lacrimal sac scissors, comprising a mounting tube (6), characterized in that: One end of the mounting tube (6) is connected to the outer tube (4), a transmission rod (3) is movably arranged in the outer tube (4), a baffle (7) is arranged at one end of the transmission rod (3) close to the mounting tube (6), a mounting block (9) is connected to the bottom of the mounting tube (6), a fixed handle (10) is fixedly connected to the mounting block (9), a movable handle (11) is hingedly connected to the mounting block (9), a U-shaped shifting piece (8) is arranged at the top of the movable handle (11) and cooperates with the baffle (7) to drive the transmission rod (3) to move axially, and the transmission rod (3) is away from the baffle (7). A driving ring (15) is provided at one end of the outer cylinder (4); a movable blade (2) is hingedly provided at one end of the outer cylinder (4) away from the mounting cylinder (6); the end of the movable blade (2) movably extends into the outer cylinder (4); and the end of the movable blade (2) is provided with a through hole (16) that is engaged with the driving ring (15); the diameter of the through hole (16) is larger than the cross-sectional diameter of the driving ring (15); a fixed blade (1) that cooperates with the movable blade (2) is fixedly provided on the outer cylinder (4); and the fixed blade (1) and the movable blade (2) are arranged to be deflected along the axis of the outer cylinder (4).

2. The lacrimal sac scissors according to claim 1, characterized in that: The outer cylinder (4) is movably arranged in the mounting cylinder (6); an annular protrusion (17) located in the mounting cylinder (6) is arranged at the end of the outer cylinder (4); an end of the annular protrusion (17) away from the outer cylinder (4) is fixedly connected to a fixing ring (19) movably sleeved on the transmission rod (3); and the diameter of the fixing ring (19) is smaller than the diameter of the annular protrusion (17); and a fixing screw (18) abutting against the fixing ring (19) is threadedly penetrated on the mounting cylinder (6).

3. The lacrimal sac scissors according to claim 2, characterized in that: The inner wall of the outer cylinder (4) is provided with a guide groove (14) along the length direction, and a sliding block (13) located in the guide groove (14) is fixedly connected to the transmission rod (3).

4. The lacrimal sac scissors according to claim 2, characterized in that: A handle (5) is fixedly arranged on the outer wall of the outer cylinder (4).

5. The lacrimal sac scissors according to claim 4, characterized in that: The end surface of the mounting cylinder (6) close to the fixed blade (1) is provided with angle scale lines arranged along the circumference of the outer cylinder (4).

6. The lacrimal sac scissors according to claim 2, characterized in that: The blocking piece (7) is circular.

7. The lacrimal sac scissors according to claim 1, characterized in that: The fixed handle (10) and the movable handle (11) are both provided with finger rings (12).

8. The lacrimal sac scissors according to claim 1, characterized in that: The fixed blade (1) and the movable blade (2) are sharpened on both sides.

9. The lacrimal sac scissors according to claim 1, characterized in that: The fixed blade (1) and the movable blade (2) form an angle of 30° with the axis of the outer cylinder (4).

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