Microscopic tweezers capable of preventing head error

Abstract

The utility model discloses a pair of head-mistake-proof microscopic tweezers, and belongs to the technical field of medical instruments. The micro tweezers overcome the defect that tips of traditional micro tweezers in the prior art are prone to dislocation. The main structure of the forceps comprises a left forceps handle and a right forceps handle which are movably connected, each of the left forceps handle and the right forceps handle comprises a forceps handle clamping section, a forceps handle holding section and a forceps handle connecting section which are sequentially connected, a positioning pin is arranged on the inner side of the forceps handle clamping section of the left forceps handle, and a positioning pin hole matched with the positioning pin is formed in the forceps handle clamping section of the right forceps handle. And the positioning pin is in clearance fit with the positioning pin hole. The utility model is mainly used for clamping tissues, blood vessels and sutures in microsurgery.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and more specifically, it relates to a micro forceps to prevent misalignment. Background Technology

[0002] Microsurgery is a delicate surgical procedure performed by surgeons under the magnification of an operating microscope using microsurgical instruments on tiny tissues. Among various microsurgical instruments, microforceps are a crucial one. Microsurgical procedures are often time-consuming, and surgeons may apply lateral force due to fatigue when using microforceps, causing misalignment of the forceps tips. This can adversely affect the grasping of tissues and blood vessels, and in severe cases, can even cause the two tips of the forceps to completely misalign into a V-shape, cutting small blood vessels, tissues, or sutures, seriously affecting the progress of the surgery. This problem is particularly prominent with microforceps with a head width of less than 0.4 mm.

[0003] Currently available microscopic forceps often come with a cylindrical locating pin. During the closing process of the forceps, any point on the forceps is actually making a circular motion around the connection point of the forceps handle, and the trajectory of this motion is an arc. Since both the locating pin and the pin hole are straight structures perpendicular to their respective planes, if the pin hole size is exactly the same as the outer diameter of the locating pin, it will be impossible to insert smoothly into the pin hole due to the mismatch between its shape and the motion trajectory. To allow the locating pin to be inserted smoothly into the pin hole, the pin hole size is often increased, or the locating pin is made into a conical shape. This results in a larger gap between the locating pin and the pin hole. Combined with the magnification effect caused by the positional relationship between the forceps tip and the locating pin, this increases the misalignment of the forceps head, making it difficult to prevent the microscopic forceps tip from misaligning.

[0004] For example, Chinese utility model patent CN202446191U discloses a medical micro forceps, which performs clamping operations by operating a pair of forceps handles to drive a pair of forceps heads corresponding to the forceps handles; each blade has a groove that matches the blade edge of the other blade. However, its shortcomings are that: because the blade edge is relatively thin, it is very easy for the two forceps heads to misalign when they perform clamping operations, which will have an adverse effect on the clamping of tissues, blood vessels, etc. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a micro-tweezers that prevents misalignment.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An anti-mistake head micro forceps, comprising a left forceps handle and a right forceps handle which are movably connected. Both the left forceps handle and the right forceps handle include a forceps handle clamping section, a forceps handle holding section, and a forceps handle connecting section that are connected in sequence. A positioning pin is arranged inside the forceps handle clamping section of the left forceps handle, and a positioning pin hole that is matched with the positioning pin is arranged on the forceps handle clamping section of the right forceps handle, and there is a clearance fit between the positioning pin and the positioning pin hole.

[0008] Preferably, positive knurling for increasing friction is arranged on the outer sides of the forceps handle holding sections of the left forceps handle and the right forceps handle, and grooves for reducing weight are arranged on the inner sides.

[0009] Preferably, the positioning pin is strip-shaped, and the cross-section of the positioning pin is "convex" shaped.

[0010] Preferably, the length of the positioning pin is 2 mm to 12 mm, the height is 1 mm to 3 mm, and the width of the part of the positioning pin inserted into the positioning pin hole is 0.5 mm to 2 mm.

[0011] Preferably, a chamfer is arranged on the upper part of the positioning pin for facilitating insertion into the positioning pin hole.

[0012] Preferably, the positioning pin hole is a rectangular through hole, and fillets are arranged around it.

[0013] Preferably, the length of the positioning pin hole is 3 mm to 13 mm, the width is 0.5 mm to 2 mm; and after the positioning pin is inserted into the positioning pin hole, the clearance between the positioning pin and the positioning pin hole is 0.02 mm to 0.06 mm.

[0014] Preferably, the positioning pin is connected to the left forceps handle by welding.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The positioning pin is strip-shaped, with a "convex" cross-section, and a length of 2 mm to 12 mm. After the forceps are closed and the positioning pin is inserted into the positioning pin hole, the positioning pin and the positioning pin hole are in surface contact, which can effectively avoid the lateral movement of the forceps handle, and at the same time greatly limit the misalignment amplification caused by the positional relationship between the forceps tip and the positioning pin, thereby reducing the misalignment amount of the forceps tip; the lower part of the "convex" shape is a stop component, which prevents the forceps head from opening due to excessive pinching force and affects the clamping effect;

[0017] 2. The upper part of the positioning pin has a large inclination angle on both short sides to avoid interference with the positioning pin hole due to the circular motion trajectory of the positioning pin during the closing process of the forceps. Chamfers are arranged on both long sides of the upper part of the positioning pin, which can ensure that the positioning pin is inserted into the positioning pin hole more smoothly, making the fitting process smoother and reducing the possible obstacles encountered during the fitting use;

[0018] 3. The outer side is knurled to increase friction, which can increase the friction between the fingers and the handle of the tweezers, prevent slippage, make it easier for users to grip the tweezers, and prevent them from slipping during delicate operations;

[0019] 4. The grip section of the forceps handle has a groove on the inside, which can reduce the weight of the forceps, alleviate the doctor's hand fatigue, and prevent the doctor from applying pressure to the side when using micro forceps;

[0020] 5. Maintain a certain gap (0.02mm~0.06mm) between the positioning pin and the positioning pin hole to ensure both the flexibility of the micro forceps and accurate positioning during operation;

[0021] 6. The positioning pin is connected to the left tweezer handle by welding. Compared with other connection methods, welding is more robust and reliable, which can effectively prevent loosening or falling off during use, thereby improving the durability of the micro forceps. At the same time, it ensures that the positioning pin can be accurately inserted into the positioning pin hole, thus guaranteeing positioning accuracy.

[0022] In summary, this utility model, by providing a long strip-shaped positioning pin and a positioning pin hole with the same width, can effectively prevent lateral movement of the forceps handle after being inserted together, solving the problem of misalignment of the micro forceps tip, and improving the stability, safety and efficiency of the surgical procedure. Attached Figure Description

[0023] Figure 1 This is the front view of the present invention;

[0024] Figure 2 This is the right view of the present invention;

[0025] Figure 3 This is a schematic diagram of the positioning pin and positioning pin hole after they are closed in this utility model;

[0026] Figure 4 This is a schematic diagram of the positioning pin in this utility model;

[0027] Figure 5 This is the front view of the locating pin in this utility model.

[0028] In the diagram: 1. Left tweezer handle; 2. Right tweezer handle; 3. Tweezer handle clamping section; 4. Tweezer handle gripping section; 5. Tweezer handle connecting section; 6. Positioning pin; 7. Positioning pin hole; 8. Knurling; 9. Groove. Detailed Implementation

[0029] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0030] Example 1:

[0031] like Figure 1-3As shown in the figure, an anti-misalignment head micro forceps includes a left forceps handle 1 and a right forceps handle 2 which are movably connected. Both the left forceps handle 1 and the right forceps handle 2 include a forceps handle clamping section 3, a forceps handle holding section 4, and a forceps handle connecting section 5 that are connected in sequence. A positioning pin 6 is provided inside the forceps handle clamping section 3 of the left forceps handle 1, and a positioning pin hole 7 that is matched with the positioning pin 6 is provided on the forceps handle clamping section 3 of the right forceps handle 2, and there is a clearance fit between the positioning pin 6 and the positioning pin hole 7.

[0032] Specifically, the forceps handle connecting section 5 on the left forceps handle 1 and the forceps handle connecting section 5 on the right forceps handle 2 are welded together. The positioning pin 6 is provided at the rear part of the forceps handle clamping section 3 on the left forceps handle 1, and the positioning pin hole 7 is provided at the rear part of the forceps handle clamping section 3 on the right forceps handle 2. By means of the present utility model, the lateral movement of the forceps handle can be effectively avoided, the problem of the misalignment of the tip of the micro forceps is solved, and the stability, safety, and efficiency of the surgical process are improved.

[0033] Embodiment 2:

[0034] An anti-misalignment head micro forceps, which is different from that in Embodiment 1 in that positive-thread knurling 8 for increasing friction is provided on the outer sides of the forceps handle holding sections 4 of the left forceps handle 1 and the right forceps handle 2, and grooves 9 for reducing weight are provided on the inner sides. The positive-thread knurling 8 is provided on the outer side to increase friction, which can increase the friction between the fingers and the forceps handle, prevent slipping, make it easier for the user to hold the forceps, and it is not easy to slip off during fine operations; at the same time, grooves 9 are provided on the inner side of the forceps handle holding section 4, which can reduce the weight of the forceps, slow down the fatigue of the doctor's hand, and prevent the doctor from applying lateral pressure when using the micro forceps.

[0035] As Figure 4-5 shown in the figure, the positioning pin 6 is strip-shaped, and the cross-section of the positioning pin 6 is a "convex" - shaped structure, with a length of 2 mm to 12 mm. After the forceps are closed and the positioning pin 6 is inserted into the positioning pin hole 7, the positioning pin 6 and the positioning pin hole 7 are in surface contact, which can effectively avoid the lateral movement of the forceps handle, and at the same time greatly limit the misalignment amplification effect caused by the positional relationship between the tip of the forceps and the positioning pin 6, thereby reducing the misalignment amount of the tip of the forceps; the lower part of the "convex" shape can play a role of stopping, preventing the opening of the forceps head due to excessive pinching force and affecting the clamping effect.

[0036] Furthermore, the length of the positioning pin 6 is 2 mm to 12 mm, the height is 1 mm to 3 mm, and the width of the part of the positioning pin 6 inserted into the positioning pin hole 7 is 0.5 mm to 2 mm, which is the same as the width of the positioning pin hole 7; a chamfer is provided on the outer circumference of the upper part of the positioning pin 6 for facilitating the insertion into the positioning pin hole 7.

[0037] Furthermore, the locating pin hole 7 is a rectangular through hole with rounded corners on all four sides; the length of the locating pin hole 7 is 3mm to 13mm, and the width is 0.5mm to 2mm; and after the locating pin 6 is inserted into the locating pin hole 7, the gap between the locating pin 6 and the locating pin hole 7 is 0.02mm to 0.06mm. The upper part of the locating pin 6 has chamfers on all four sides, which can ensure that the locating pin 6 is inserted into the locating pin hole 7 more smoothly. At the same time, the chamfers on the upper circumference of the locating pin 6 and the rounded corners around the locating pin hole 7 make the mating process smoother and reduce the obstacles that may be encountered during use.

[0038] Furthermore, the positioning pin 6 is welded to the left tweezer handle 1. Welding the positioning pin 6 to the left tweezer handle 1 is a more robust and reliable method than other connection methods, effectively preventing loosening or detachment during use, thus improving the durability of the micro-tweezers. It also ensures that the positioning pin 6 can be accurately inserted into the positioning pin hole 7, guaranteeing positioning accuracy.

Claims

1. A mistake-proof microforceps, comprising a left forceps handle (1) and a right forceps handle (2) connected movably, the left forceps handle (1) and the right forceps handle (2) each comprising a forceps handle clamping section (3), a forceps handle holding section (4) and a forceps handle connecting section (5) connected in sequence, characterized in that: The left forceps handle (1) is provided with a positioning pin (6) inside the forceps handle clamping section (3), the right forceps handle (2) is provided with a positioning pin hole (7) matched with the positioning pin (6) on the forceps handle clamping section (3), and the positioning pin (6) and the positioning pin hole (7) are gap matched; The positioning pin (6) is long strip-shaped, and the cross section of the positioning pin (6) is "convex" shaped; The length of the positioning pin (6) is 2mm-12mm, the height is 1mm-3mm, and the width of the part of the positioning pin (6) inserted into the positioning pin hole (7) is 0.5mm-2mm; The length of the positioning pin hole (7) is 3mm-13mm, the width is 0.5mm-2mm, and the gap between the positioning pin (6) and the positioning pin hole (7) is 0.02mm-0.06mm after the positioning pin (6) is inserted into the positioning pin hole (7).

2. The mistake-proof microforceps according to claim 1, characterized in that: The outer side of the forceps handle gripping section (4) of the left forceps handle (1) and the right forceps handle (2) is provided with positive grain knurling (8) for increasing friction, and the inner side is provided with a groove (9) for reducing weight.

3. The smart mistake-proofing head microforceps according to claim 2, characterized in that: The upper part of the positioning pin (6) is provided with a chamfer.

4. The smart prevention head according to claim 3, characterized in that: The positioning pin hole (7) is a rectangular through hole, and the periphery is provided with a round corner.

5. The mistake-proof microforceps according to any one of claims 1-4, characterized in that: The positioning pin (6) is welded with the left forceps handle (1).

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