Microscopic tweezers with injection positioning function

Abstract

The utility model provides a pair of microscopic forceps with an injection positioning function, which comprises a forceps handle, the forceps handle is connected with a first grab handle and a second grab handle, the first grab handle and the second grab handle are connected with a connecting block, and the connecting block is connected with a forceps tip; a positioning measuring column is arranged on the side wall of the first grab handle, a limiting block is arranged on the side wall of the second grab handle, the through hole extends to the limiting block, a containing groove is formed in the limiting block, one end of the positioning measuring column is connected into the containing groove in a sliding mode, the second grab handle is connected with a fixing assembly, and when the positioning measuring column is fixed, the tip ends of the two tweezers are parallel to each other. By means of the structure, the instrument can have the distance measuring function and the tweezers function, and operation is simplified. During measurement, the positioning measuring column is fixed, and the tip of one tweezers is tangent to the edge of the cornea, so that the micro tweezers can accurately position the position of an injection point during vitreous cavity injection. And after the positioning measuring column is loosened, the two tweezers tips can be folded, so that the microscopic tweezers have the tweezers function.

Description

Technical Field

[0001] The utility model relates to the technical field of eye medical instruments, in particular to a pair of microscopic forceps with an injection positioning function. Background Art

[0002] At present, two instruments, micro forceps and eye gauges, are required during intravitreal injections in ophthalmology. During intravitreal injections, the patient needs to be instructed to lie flat with the operated eye looking directly upward. The injection site is 3.5mm to 4mm behind the corneal edge, and the needle is inserted toward the center of the eyeball. Also, during the injection, the drug is slowly pushed in and then the needle is removed. Subsequent intravitreal injections rotate the sclera site to avoid repeated injections at the same location.

[0003] In order to ensure that the injection site is 3.5mm to 4mm away from the limbus, an ophthalmic ruler is often used in clinical operations to measure the distance from the limbus. However, there are special requirements for the injection site to be 3.5mm to 4mm away from the limbus. The injection site starts from the limbus and passes through the 3.5mm to 4mm straight line from the center of the cornea (such as Figure 1 Alternatively, the injection site is 3.5 mm to 4 mm measured perpendicular to the tangent line of the cornea (as shown in Figure 2 shown).

[0004] However, the disadvantages of existing devices are as follows:

[0005] 1. The existing eye gauge can only guarantee that the measuring length is 4mm, but it cannot determine whether the extension lines of the two measuring ends of the eye gauge pass through the center of the circle or are perpendicular to the tangent line of the cornea. In actual operation, it may happen that the extension lines of the two measuring ends of the eye gauge do not pass through the center of the circle or are not perpendicular to the tangent line of the cornea (such as Figure 3 If this happens, it will lead to inaccurate measurement and cause the injection site to deviate from the required site.

[0006] 2. Two instruments, microscopic forceps and eye gauge measuring ruler, are needed during the operation, which is not concise enough and makes the operation more complicated. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a microscopic forceps with an injection positioning function, which can simultaneously have the functions of distance measurement and tweezers clamping, thereby simplifying the operation.

[0008] The utility model is achieved in this way:

[0009] The utility model provides a microscopic tweezers with an injection positioning function, comprising a tweezers handle, wherein the two ends of the tweezers handle are respectively connected to a first gripping handle and a second gripping handle, the lower ends of the first gripping handle and the second gripping handle are respectively connected to a connecting block, and the bottom of the connecting block is connected to a tweezers tip; the length of the tweezers tip is 2mm.

[0010] The inner wall of the first handle is provided with a positioning column, the outer wall of the second handle is provided with a limiting block, the inner wall of the second handle is provided with a through hole, the through hole extends to the limiting block, so that a receiving groove is formed at the limiting block, one end of the positioning column is slidably connected in the receiving groove, the second handle is connected with a fixing component for fixing the positioning column and the limiting block, and when the positioning column is fixed, the two tweezers tips are parallel to each other, and the distance between the two tweezers tips is 4mm.

[0011] Furthermore, a first spring is provided in the accommodating groove, and a stopper matching the accommodating groove is provided at one end of the positioning column located in the accommodating groove, one end of the first spring contacts the stopper, a positioning block is provided on the top of the stopper, and the limit block is provided with a connecting groove connected to the accommodating groove, the positioning block is slidably connected in the connecting groove, a positioning groove is provided on the top of the positioning block, and one end of the fixing component is engaged in the positioning groove.

[0012] Further, the fixing assembly includes a pulling block, a connecting cylinder, a limiting plate and a clamping column, the pulling block is connected to the upper end of the connecting cylinder, the limiting plate is connected to the lower end of the connecting cylinder, the clamping column is connected to the bottom of the limiting plate, a cavity is provided on the side of the second handle, the pulling block is located in the cavity, and one end of the pulling block extends to the outside of the cavity, the second handle is also provided with a telescopic cavity, the upper end of the telescopic cavity is connected to the cavity, and the lower end of the telescopic cavity is connected to the positioning groove, the connecting cylinder, the limiting plate and the clamping column are all located in the telescopic cavity, and a second spring is further provided on the outer wall of the connecting cylinder, the upper end of the second spring abuts against the top wall of the telescopic cavity, the lower end of the second spring abuts against the limiting plate, and one end of the clamping column passes through the telescopic cavity and is engaged in the positioning groove.

[0013] Furthermore, a first marking scale is provided on the positioning column.

[0014] Furthermore, a second marking scale is provided on the tip of the tweezers.

[0015] Furthermore, the second marking scale is coated with color paint.

[0016] The advantages of the utility model are: the structure of the utility model enables an instrument to have both the functions of distance measurement and tweezers, simplifying the operation. When measuring, fix the positioning column so that the two tweezers tips are parallel to each other, and the distance between the two tweezers tips is 4mm, and one of the tweezers tips is tangent to the edge of the cornea, so that the microscopic tweezers can accurately locate the injection point during vitreous cavity injection. After loosening the fixation of the positioning column, the positioning column can move in the receiving groove, so that the two tweezers tips can be closed, so that the microscopic tweezers have the function of tweezers.

[0017] Secondly, by setting the pulling block, spring, limit plate, positioning block and positioning groove in the fixing component, the micro forceps can be prevented from being deformed after long-term use, which will affect the positioning of the injection point during vitreous cavity injection, ensure the distance between the first handle and the second handle, and ensure the accuracy of the micro forceps. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the injection site on a straight line passing through the exact center of the cornea.

[0020] Figure 2 This is a schematic diagram of the structure where the injection site is 4 mm away from the tangent line of the corneal limbus.

[0021] Figure 3 Schematic diagram of the structure showing a deviation between the injection site and the required site.

[0022] Figure 4 The structure of the microscopic tweezers of the utility model is shown in FIG. Figure 1 .

[0023] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0024] Figure 6 The structure of the microscopic tweezers of the utility model is shown in FIG. Figure 2 .

[0025] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0026] Figure 8 This is a schematic diagram of the structure of the fixing component of the utility model.

[0027] Fig. 9 This is a schematic diagram of the connection structure between the positioning column, the stopper and the positioning block of the utility model.

[0028] Fig.10 The structure of the microscopic tweezers of the utility model is shown in FIG. Figure 3 .

[0029] Fig.11 for Fig.10 A partial enlarged view of point C in the middle.

[0030] Description of the numbers in the figure:

[0031] 1. Tweezer handle; 2. First grip; 3. Second grip; 301. Cavity; 302. Telescopic cavity; 4. Connecting block; 5. Tweezer tip; 501. Second identification scale; 6. Positioning column; 601. First identification scale; 7. Limiting block; 701. Accommodating groove; 702. Connecting groove; 8. Fixing assembly; 801. Pulling block; 802. Connecting cylinder; 803. Limiting plate; 804. Clamping column; 9. First spring; 10. Stop block; 11. Positioning block; 1101. Positioning groove; 12. Second spring. DETAILED DESCRIPTION

[0032] See also Figures 4 to 11 The utility model provides a microscopic forceps with an injection positioning function, comprising a forceps handle 1, the forceps handle 1 is V-shaped, the forceps handle 1 is made of elastic material, the two ends of the forceps handle 1 are respectively connected to a first grip 2 and a second grip 3, the lower ends of the first grip 2 and the second grip 3 are respectively connected to a connecting block 4, and the bottom of the connecting block 4 is connected to a forceps tip 5;

[0033] The inner wall of the first handle 2 is provided with a positioning column 6, the outer wall of the second handle 3 is provided with a limiting block 7, the inner wall of the second handle 3 is provided with a through hole, the through hole extends to the limiting block 7, so that a receiving groove 701 is formed at the limiting block 7, one end of the positioning column 6 is slidably connected in the receiving groove 701, the second handle 3 is connected with a fixing component 8 for fixing the positioning column 6 and the limiting block 7, and when the positioning column 6 is fixed, the two tweezers tips 5 are parallel to each other, and the distance between the two tweezers tips 5 is 4 mm.

[0034] Specifically, a first spring 9 is arranged in the accommodating groove 701, and a stopper 10 matching the accommodating groove 701 is arranged at one end of the positioning column 6 located in the accommodating groove 701, and the diameter of the stopper 10 is larger than the diameter of the positioning column 6. One end of the first spring 9 contacts the stopper 10, and a positioning block 11 is arranged on the top of the stopper 10. The limiting block 7 is provided with a connecting groove 702 connected to the accommodating groove 701, and the positioning block 11 is slidably connected in the connecting groove 702. A positioning groove 1101 is arranged on the top of the positioning block 11, and one end of the fixing component 8 is engaged in the positioning groove 1101.

[0035] Specifically, the fixing assembly 8 includes a pull block 801, a connecting cylinder 802, a limit plate 803 and a clamping column 804, the pull block 801 is connected to the upper end of the connecting cylinder 802, the limit plate 803 is connected to the lower end of the connecting cylinder 802, the clamping column 804 is connected to the bottom of the limit plate 803, a cavity 301 is provided on the side of the second handle 3, the pull block 801 is located in the cavity 301, and one end of the pull block 801 extends to the outside of the cavity 301, and the second handle 3 is also provided with a telescopic cavity 301. 02, the upper end of the telescopic cavity 302 is connected to the cavity 301, the lower end of the telescopic cavity 302 is connected to the positioning groove 1101, the connecting cylinder 802, the limiting plate 803 and the clamping column 804 are all located in the telescopic cavity 302, and the outer wall of the connecting cylinder 802 is also provided with a second spring 12, the upper end of the second spring 12 abuts against the top wall of the telescopic cavity 302, the lower end of the second spring 12 abuts against the limiting plate 803, and one end of the clamping column 804 passes through the telescopic cavity 302 and is clamped in the positioning groove 1101. When the present microtweezers have the function of tweezers (that is, when the positioning block is located on the right side of the clamping column), as Fig.11 As shown, the limiting plate 803 contacts the bottom wall of the telescopic cavity 302 to prevent the clamping column from contacting the outer wall of the positioning column, thereby preventing the smoothness of the opening and closing of the first handle and the second handle.

[0036] Specifically, a first marking scale 601 is provided on the positioning column 6 .

[0037] Specifically, each of the tweezer tips 5 is provided with a second identification scale 501. The second identification scales 501 on the two tweezer tips 5 are consistent.

[0038] Specifically, each of the second identification scales 501 is coated with color paint. More specifically, the second identification scale 501 is composed of a plurality of identification scale units, and each identification scale unit is coated with color paint of different colors.

[0039] A specific application of the utility model is:

[0040] When the present microscopic forceps is used as forceps, the pull block 801 is pulled upwards to make the clamping column 804 completely retract into the telescopic cavity 302, and the first handle 2 and the second handle 3 are pinched to make the two handles close to each other. At this time, the clamping column 804 and the positioning groove 1101 are staggered with each other to loosen the fixation of the positioning column 6 so that the two handles can move freely. After loosening the pull block 801, due to the setting of the limit plate, the clamping column 804 will not contact the positioning column, and the two handles can also move freely. After loosening the pull block 801, and the positioning block 11 is located on the right side of the clamping column 804 at this time, even if the hand loosens the grip of the two handles, the first spring 9 is reset, and the clamping column 804 will not be re-engaged in the positioning groove 1101. Therefore, after the clamping column 804 is out of the positioning groove 1101, the two handles can be opened and closed freely to have the function of forceps.

[0041] When it is necessary to accurately locate the injection point during intravitreal injection, pull the pull block 801 upwards, compress the second spring 12, and retract the clamping column 804 completely into the telescopic cavity 302. Release the first grip 2, and reset the first spring 9 and the tweezers handle 1. Driven by the first spring 9 and the tweezers handle 1, the positioning column 6 slides in the accommodating groove 701, and after the first spring 9 and the tweezers handle 1 are reset to the initial position, the clamping column 804 is opposite to the positioning groove 1101.

[0042] Then, release the pull block 801, and under the action of the second spring 12, the clamping column 804 moves downward, so that the clamping column 804 is engaged in the positioning groove 1101, so that the positioning column 6 is fixed. When the positioning column 6 is fixed, the two tweezers tips 5 are parallel to each other, and the distance between the two tweezers tips 5 is 4 mm. At this time, one of the tweezers tips 5 is tangent to the edge of the cornea, and a point is selected on the other tweezers tip 5 (this point is the injection point), and the line connecting this point and the tangent point is perpendicular to the length direction of the tweezers tip 5, so that the microtweezers can accurately locate the position of the injection point during vitreous cavity injection. When selecting the injection point, it can also be selected according to the second identification scale 501. For example: when the tip of the tweezers 5 on the side of the first handle 2 is tangent to the edge of the cornea, the point of tangency between the tip of the tweezers 5 and the edge of the cornea is on one of the second marking scales 501, then the same second marking scale 501 is selected on the tip of the tweezers 5 on the side of the second handle 3, and the position of the second marking scale 501 is the injection point.

[0043] In addition, the injection point can be selected by applying a colored paint on the tweezer tip 5. For example, when one of the tweezer tips 5 is tangent to the edge of the cornea, the red marking scale unit on the tweezer tip 5 is in contact with the edge of the cornea, then the marking scale unit coated with red pigment on the other tweezer tip 5 is the injection point.

[0044] The structure of the utility model enables an instrument to have both the functions of distance measurement and tweezers, simplifying the operation. When measuring, fix the positioning column 6 so that the two tweezers tips 5 are parallel to each other, and the distance between the two tweezers tips 5 is 4 mm, and one of the tweezers tips 5 is tangent to the edge of the cornea, so that the microscopic tweezers can accurately locate the injection point during vitreous cavity injection. After loosening the fixation of the positioning column 6, the positioning column 6 can move in the accommodating groove 701, so that the two tweezers tips 5 can be closed, so that the microscopic tweezers have the function of tweezers.

[0045] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A microscopic forceps with injection positioning function, comprising a forceps handle, characterized in that: The two ends of the tweezers handle are respectively connected to a first grip and a second grip, the lower ends of the first grip and the second grip are respectively connected to a connecting block, and the bottom of the connecting block is connected to the tweezers tip; The inner wall of the first handle is provided with a positioning column, the outer wall of the second handle is provided with a limiting block, the inner wall of the second handle is provided with a through hole, the through hole extends to the limiting block, so that a receiving groove is formed at the limiting block, one end of the positioning column is slidably connected in the receiving groove, the second handle is connected with a fixing component for fixing the positioning column and the limiting block, and when the positioning column is fixed, the two tweezers tips are parallel to each other, and the distance between the two tweezers tips is 4mm.

2. A microscopic forceps with injection positioning function as claimed in claim 1, characterized in that: A first spring is arranged in the accommodating groove, and a stopper matching the accommodating groove is arranged at one end of the positioning column located in the accommodating groove, one end of the first spring contacts the stopper, a positioning block is arranged on the top of the stopper, and a connecting groove connected to the accommodating groove is arranged on the limiting block, the positioning block is slidably connected in the connecting groove, a positioning groove is arranged on the top of the positioning block, and one end of the fixing component is engaged in the positioning groove.

3. A micro forceps with injection positioning function as claimed in claim 2, characterized in that: The fixing assembly includes a pulling block, a connecting cylinder, a limiting plate and a clamping column, the pulling block is connected to the upper end of the connecting cylinder, the limiting plate is connected to the lower end of the connecting cylinder, the clamping column is connected to the bottom of the limiting plate, a cavity is provided on the side of the second handle, the pulling block is located in the cavity, and one end of the pulling block extends to the outside of the cavity, the second handle is also provided with a telescopic cavity, the upper end of the telescopic cavity is connected to the cavity, and the lower end of the telescopic cavity is connected to the positioning groove, the connecting cylinder, the limiting plate and the clamping column are all located in the telescopic cavity, and a second spring is further provided on the outer wall of the connecting cylinder, the upper end of the second spring abuts against the top wall of the telescopic cavity, the lower end of the second spring abuts against the limiting plate, and one end of the clamping column passes through the telescopic cavity and is engaged in the positioning groove.

4. The micro forceps with injection positioning function as claimed in claim 1, characterized in that: The positioning column is provided with a first marking scale.

5. The micro forceps with injection positioning function as claimed in claim 1, characterized in that: A second marking scale is arranged on the tip of the tweezers.

6. The micro forceps with injection positioning function as claimed in claim 5, characterized in that: The second marking scale is coated with color paint.

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