Basket clamp

Abstract

The invention discloses a pair of basket pincers, comprising: a tip shaft assembly, which is provided with an accommodating cavity along a central axis, and two sides of the inner wall of one end of the tip shaft assembly are symmetrically provided with first arc-shaped grooves; the connecting rod is slidably arranged in the containing cavity, and first arc-shaped flanges are symmetrically arranged on the two sides of one end of the connecting rod; the movable jaw assembly comprises a jaw part and a rotating part which are integrally formed; the jaw part is matched with the tip shaft assembly to form a plier head, second arc-shaped flanges are symmetrically arranged on the outer side of the rotating part, second arc-shaped grooves are symmetrically formed in the inner side of the rotating part, the second arc-shaped flanges are in sliding fit with the first arc-shaped grooves, and the second arc-shaped grooves are in sliding fit with the first arc-shaped flanges; the handle assembly is connected with the other end of the tip shaft assembly and the other end of the connecting rod and used for driving the movable jaw assembly to be opened and closed in the direction of the tip shaft assembly. The shearing device has the characteristics of being larger in shearing range, reducing the use risk and improving the stability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more particularly to a basket forceps. Background Art

[0002] Basket forceps are mainly used to repair the meniscus of the knee joint. Meniscus injury is the most common orthopedic disease in sports trauma of the knee joint. Due to its complex anatomical position and large individual variation, surgical treatment is relatively difficult. At present, with the gradual development of arthroscopic technology in clinical practice, arthroscopic meniscus plasty has the advantages of less trauma, clear field of vision and rapid postoperative recovery. It is gradually becoming one of the main surgical procedures for the treatment of meniscus injury. Basket forceps are indispensable surgical instruments in meniscus plasty.

[0003] There are many structural forms in the development of basket clamps, but most of them have some problems, such as:

[0004] 1. Currently, basket forceps require a high force to achieve bite cutting of the jaws, which increases the difficulty of manual repair;

[0005] 2. Due to the high force required, the end of the forceps is easily damaged. If it is damaged in the joint cavity, the forceps head will remain in the joint cavity. It is difficult to remove it during minimally invasive surgery, which will prolong the operation time, increase the patient's pain, and even cause medical accidents;

[0006] 3. During the use of basket forceps, the blades are often severely worn after cutting several times, which leads to continuous cutting during surgery, increases the difficulty of surgery, easily reduces the service life of the basket forceps, and requires frequent replacement of instruments. Summary of the invention

[0007] The purpose of the present invention is to design and develop a basket pliers which, through a symmetrical rotation structure, improves structural stability while increasing shearing efficiency, reducing damage risk and extending service life.

[0008] The technical solution provided by the present invention is:

[0009] A basket clamp comprising:

[0010] A tip shaft assembly, which is provided with a receiving cavity along the central axis, and first arc-shaped grooves are symmetrically provided on both sides of the inner wall of one end of the tip shaft assembly;

[0011] A connecting rod is slidably disposed in the accommodating cavity, and first arc-shaped flanges are symmetrically disposed on both sides of one end of the connecting rod;

[0012] A movable jaw assembly, comprising an integrally formed jaw portion and a rotating portion;

[0013] The jaw portion cooperates with the tip shaft assembly to form a pliers head, a second arc-shaped flange is symmetrically arranged on the outer side of the rotating portion, a second arc-shaped groove is symmetrically arranged on the inner side of the rotating portion, and the second arc-shaped flange is slidably matched with the first arc-shaped groove, and the second arc-shaped groove is slidably matched with the first arc-shaped flange;

[0014] A handle assembly is connected to the other end of the tip shaft assembly and the other end of the connecting rod, and is used to drive the movable jaw assembly to open and close in the direction of the tip shaft assembly.

[0015] Preferably, the tip shaft assembly comprises:

[0016] A pointed end portion having a recessed portion at its center;

[0017] A fixing rod, which is provided with a receiving cavity along the central axis, and one end of the fixing rod is integrally provided with the tip end, and the other end is connected with the handle assembly;

[0018] Wherein, the first arc-shaped groove is symmetrically arranged on the inner walls on both sides of one end of the accommodating cavity close to the pointed end.

[0019] Preferably, the jaw portion is receivable in the recessed portion.

[0020] Preferably, a serrated shearing edge is provided on the inner circumference of the jaw portion away from the rotating portion.

[0021] Preferably, the recessed portion is provided with an arc-shaped shearing edge on the inner circumference away from the fixing rod;

[0022] Wherein, the serrated shearing edge can cooperate with the arc-shaped shearing edge.

[0023] Preferably, the handle assembly comprises:

[0024] A thumb end connected to the other end of the fixing rod;

[0025] The finger end is rotatably connected to the thumb end, and the finger end is connected to the other end of the connecting rod, so as to selectively pull or push the connecting rod to move forward and backward in the accommodating cavity.

[0026] Preferably, the tip shaft assembly is inclined toward one side of the movable jaw assembly.

[0027] Preferably, the movable jaw assembly is inclined toward one side of the tip shaft assembly.

[0028] Preferably, the connecting rod comprises a first part and a second part which are integrally formed;

[0029] The width of the first portion is smaller than the width of the second portion, and the sum of the width of the first portion and the width of the two first arc-shaped flanges is the same as the width of the second portion.

[0030] The beneficial effects of the present invention are:

[0031] The basket forceps designed and developed by the present invention solve the problems of adhesion, continuous shearing and easy wear caused by existing medical instruments when cutting meniscus soft tissue. By expanding the range of the shearing blade, the problem of soft tissue adhesion is avoided, the shearing is fast, and the use efficiency is increased; the rotating structure adopts a sliding design, which avoids the risk of structural damage and enhances the mechanical strength and service life; the symmetrical structural design is adopted to enhance stability, further enhance the use efficiency, and reduce the pain of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the basket clamp of the present invention in an open state.

[0033] Figure 2 It is a schematic structural diagram of the basket forceps in the closed state of the present invention.

[0034] Figure 3 It is a schematic structural diagram of the tip shaft assembly described in the present invention.

[0035] Figure 4 It is a schematic structural diagram of the connecting rod of the present invention.

[0036] Figure 5 It is a schematic structural diagram of the movable jaw assembly of the present invention.

[0037] Figure 6 It is a schematic diagram of the cross-sectional structure of the rotating structure of the present invention.

[0038] Figure 7 It is a partially enlarged side structural schematic diagram of the basket clamp of the present invention in the open state.

[0039] Figure 8 It is a partially enlarged side structural schematic diagram of the basket forceps in the closed state of the present invention.

[0040] Fig. 9 It is a partially enlarged structural schematic diagram of the basket clamp of the present invention in the open state. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below so that those skilled in the art can implement it according to the description.

[0042] like Figure 1 , Figure 2 As shown, a basket forceps provided by the present invention comprises:

[0043] Tip shaft assembly 110, connecting rod 120, movable jaw assembly 130 and handle assembly;

[0044] Among them, Figure 3 As shown, the tip shaft assembly 110 includes a tip end portion 111 and a fixed rod 112, one end of the fixed rod 112 is integrally arranged with the tip end portion 111, the tip end portion 111 is an elliptical structure, and a recessed portion is arranged at the inner center thereof for accommodating the movable jaw assembly 130; the fixed rod 112 is provided with a rectangular accommodating cavity along its axis for accommodating the connecting rod 120; a first arc-shaped groove 113 is symmetrically arranged on the inner walls on both sides of the accommodating cavity at one end close to the tip end portion 111.

[0045] like Figure 4 As shown, the connecting rod 120 is slidably arranged in the accommodating cavity, and the connecting rod 120 includes an integrally formed first part 121 and a second part 122, the width of the first part 121 is smaller than the width of the second part 122, and first arc-shaped flanges 123 are symmetrically arranged on both sides of the first part 121, and the sum of the width of the first part 121 and the width of the two first arc-shaped flanges 123 is the same as the width of the second part 122.

[0046] like Figure 5 As shown, the movable jaw assembly 130 includes an integrally formed jaw portion 131 and a rotating portion 132. The jaw portion 131 cooperates with the pointed end 111 assembly to form a jaw head. The jaw portion 131 can be accommodated in the recessed portion. The rotating portion 132 is two symmetrically arranged plate-like structures. The outer side of the rotating portion 132 is symmetrically provided with a second arc-shaped flange 133, and the inner side of the rotating portion 132 is symmetrically provided with a second arc-shaped groove 134.

[0047] like Figure 6 As shown, the second arc-shaped flange 133 slides with the first arc-shaped groove 113, and the second arc-shaped groove 134 slides with the first arc-shaped flange 123, together forming a rotating structure, so that the connecting rod 120 can drive the movable jaw assembly 130 to slide in the tip shaft assembly 110, thereby realizing the opening and closing of the movable jaw assembly 130 toward the direction of the tip shaft assembly 110.

[0048] In this embodiment, the first arc-shaped flange 123 , the first arc-shaped groove 113 , the second arc-shaped flange 133 and the second arc-shaped groove 134 are all arc-shaped structures.

[0049] like Figure 1 , Figure 2As shown, the handle assembly includes a thumb end 141 and a finger end 142, and both the thumb end 141 and the finger end 142 are annular structures for accommodating the passage of fingers, and the thumb end 141 is fixedly connected to the other end of the fixed rod 112; the finger end 142 and the thumb end 141 are rotatably connected to each other, and the finger end 142 is connected to an end of the second part 122 away from the first part 121, for selectively pulling or pushing the connecting rod 120 to move back and forth in the accommodating cavity.

[0050] In this embodiment, the finger end 142 and the thumb end 141 are rotatably connected to each other via a pin.

[0051] In this embodiment, the finger tip 142 and the connecting rod 120 can be fixed to each other or engaged with each other, so that the rotation of the finger tip can drive the connecting rod 120 to move forward and backward, forming a driving structure, and then driving the shearing movement of the pliers head.

[0052] In this embodiment, if Figure 7 , Figure 8 As shown, the inner circumference of the jaw portion 131 away from the rotating portion 132 is provided with a serrated shearing blade, and the inner circumference of the recessed portion away from the fixed rod 112 is provided with an arc-shaped shearing blade. The serrated shearing blade can cooperate with the arc-shaped shearing blade to form a clamp head shearing structure.

[0053] The working principle of the basket clamp described in the present invention is:

[0054] Along the established channel, the basket forceps are inserted deep into the joint cavity, the thumb and fingers are held, the finger ends are driven to rotate, and the connecting rod is driven to drive the movable jaw assembly to rotate the movable jaw assembly to form a shearing structure to shear the soft tissue.

[0055] Because it is difficult to observe the position relationship between the jaws and soft tissue under the endoscope environment, when the soft tissue penetrates too deep into the jaws, adhesion problems may occur at the end, such as Fig. 9 As shown, the basket forceps of the present invention extend the serrated shearing blade portion to the rotation center of the rotating structure so that the movable jaw assembly is within the range of the shearing blade at any opening angle, thereby completely solving the problem of adhesion at the end when soft tissue penetrates too deep into the jaws, eliminating the need for repeated shearing, reducing surgical operation time, increasing use efficiency, and reducing patient pain.

[0056] In addition, the pin structure is not used at the pliers head, but a sliding structure is used instead, which reduces the risk of the pliers falling off and remaining in the cavity due to pin breakage, effectively improves the mechanical strength and increases the service life.

[0057] The basket forceps designed and developed by the present invention has a symmetrical rotating structure, which can better control the lateral displacement of the jaws, avoid continuous unilateral shearing due to the lateral displacement of the jaws, eliminate the need for repeated shearing, reduce surgical operation time, increase use efficiency, and reduce patient pain.

[0058] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A basket clamp, characterized in that: include: A tip shaft assembly, which is provided with a receiving cavity along the central axis, and first arc-shaped grooves are symmetrically provided on both sides of the inner wall of one end of the tip shaft assembly; A connecting rod is slidably disposed in the accommodating cavity, and first arc-shaped flanges are symmetrically disposed on both sides of one end of the connecting rod; A movable jaw assembly, comprising an integrally formed jaw portion and a rotating portion; The jaw portion cooperates with the tip shaft assembly to form a pliers head, a second arc-shaped flange is symmetrically arranged on the outer side of the rotating portion, a second arc-shaped groove is symmetrically arranged on the inner side of the rotating portion, and the second arc-shaped flange is slidably matched with the first arc-shaped groove, and the second arc-shaped groove is slidably matched with the first arc-shaped flange; A handle assembly is connected to the other end of the tip shaft assembly and the other end of the connecting rod, and is used to drive the movable jaw assembly to open and close in the direction of the tip shaft assembly.

2. The basket clamp according to claim 1, characterized in that: The tip shaft assembly comprises: A pointed end portion having a recessed portion at its center; A fixing rod, which is provided with a receiving cavity along the central axis, and one end of the fixing rod is integrally provided with the tip end, and the other end is connected with the handle assembly; Wherein, the first arc-shaped groove is symmetrically arranged on the inner walls on both sides of one end of the accommodating cavity close to the pointed end.

3. The basket clamp according to claim 2, characterized in that: The jaw portion may be received in the recessed portion.

4. The basket clamp according to claim 3, characterized in that: The inner circumference of the jaw portion away from the rotating portion is provided with a serrated shearing edge.

5. The basket clamp according to claim 4, characterized in that: The inner circumference of the recessed portion away from the fixing rod is provided with an arc-shaped shearing edge; Wherein, the serrated shearing edge can cooperate with the arc-shaped shearing edge.

6. The basket clamp according to claim 5, characterized in that: The handle assembly comprises: A thumb end connected to the other end of the fixing rod; The finger end is rotatably connected to the thumb end, and the finger end is connected to the other end of the connecting rod, so as to selectively pull or push the connecting rod to move forward and backward in the accommodating cavity.

7. The basket clamp according to claim 6, characterized in that: The tip shaft assembly is inclined toward one side of the movable jaw assembly.

8. The basket clamp according to claim 7, characterized in that: The movable jaw assembly is inclined toward one side of the tip shaft assembly.

9. The basket clamp according to claim 8, characterized in that: The connecting rod includes a first part and a second part formed in one piece; The width of the first portion is smaller than the width of the second portion, and the sum of the width of the first portion and the width of the two first arc-shaped flanges is the same as the width of the second portion.

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