Single-section one-way bendable needle forceps

Abstract

The utility model relates to a pair of single-section one-way bendable needle holding forceps. The single-section one-way bendable needle holding forceps comprise a handle operating mechanism, a fixing frame, a forceps head assembly and a bending operating disc assembly. An operator applies a specific acting force to the bending operation disc structure, the bending operation disc structure can pull the push-pull rod to drive the piston to move in the first outer pipe structure in the direction towards the handle operation mechanism, and meanwhile the bending connecting rod can pull the second outer pipe structure to rotate relative to the first outer pipe structure under driving of the piston. The operation direction and the operation position of the forceps head structure in the body cavity are changed, the operation is simple, and only one person can complete the operation on the focus of a special part which is not in a linear sight range or is shielded by other tissues. The single-section one-way bendable needle holding forceps are easy to use, the operation difficulty of the focus of a special part which is not in a linear sight range or is shielded by other tissues can be reduced, the operation time is shortened, the operation wound is reduced, and the harm to the body of a patient is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a single-section one-way bendable needle holding forceps. Background Art

[0002] Medical needle holders are commonly used medical instruments in surgical operations, which are used to clamp medical suture needles to suture patients' wounds. When the medical needle holders in the prior art are used to clamp medical suture needles, their clamping angle and orientation relative to the clamp handle are single and cannot be adjusted. Therefore, it is very difficult to use traditional medical needle holders to treat lesions in special parts that are not within the straight line of sight or are blocked by other tissues. It is often necessary to make a sufficiently large incision on the human body, and multiple steps are required during the entire operation, which requires the cooperation of multiple people, making the operation highly difficult, long in duration, and causing great harm to the patient's body. Summary of the Invention

[0003] Based on this, it is necessary to provide a single-section, one-way, bendable needle holding forceps that is easy to use, can reduce surgical difficulty, and shorten surgical time.

[0004] A single-section, one-way bendable needle-holding forceps, comprising a handle operating mechanism, a fixing frame, a forceps head assembly and a bending operating disc assembly; the handle operating mechanism is mounted on the fixing frame;

[0005] The clamp head assembly includes a first outer tube structure, a second outer tube structure, and a clamp head structure; one end of the first outer tube structure is connected to the fixing frame, and the other end is rotatably connected to one end of the second outer tube structure; an end of the second outer tube structure away from the first outer tube structure is connected to the clamp head structure; the first outer tube structure has a first side and a second side opposite to each other;

[0006] The bending operation plate assembly includes a bending connecting rod, a piston, a push-pull rod, and a bending operation plate structure; one end of the bending connecting rod is rotatably connected to the second outer tube structure, and the other end is rotatably connected to the piston; the piston is slidably arranged in the first outer tube structure; the push-pull rod is arranged in the first outer tube structure, one end is connected to the piston, and the other end is linked to the bending operation plate structure;

[0007] The curved operating plate structure is constructed to be able to push or pull the push-pull rod under the action of external force to drive the piston to move back and forth in the first outer tube structure, so as to pull or push the second outer tube structure to rotate toward or away from the first side through the curved connecting rod.

[0008] In one embodiment, the first outer tube structure includes a bent rear section and a rear outer tube with one end fixedly connected to one end of the bent rear section; the rear outer tube is connected to the fixing frame at one end away from the bent rear section;

[0009] The second outer tube structure includes a bending front section and a front outer tube with one end fixedly connected to the bending front section; the bending front section has a first rotation point and a second rotation point; the end of the front outer tube away from the bending front section is connected to the clamp head structure;

[0010] The piston is slidably disposed in the curved rear section and has a third rotation point; the first rotation point is rotatably connected to an end of the curved rear section away from the rear end outer tube; the two ends of the curved connecting rod are rotatably connected to the second rotation point and the third rotation point respectively;

[0011] On the rotation plane of the curved link, the first rotation point, the second rotation point, and the third rotation point are distributed in a triangle, and the first rotation point is located between the second rotation point and the third rotation point.

[0012] In one embodiment, a sidewall of the bent rear section facing the first side is provided with an avoidance gap; the piston has a limiting portion; the limiting portion extends into the avoidance gap; and the third rotation point is located on the limiting portion.

[0013] In one embodiment, the bending operation plate structure includes a bending operation plate and a slide; the bending operation plate has a rotating part; the rotating part is rotatably connected to the fixed frame; the bending operation plate forms a curved slide groove gradually approaching the rotating part along its rotation direction; a slide rod is formed on the slide; the slide rod can be slidably inserted into the curved slide groove; one end of the slide is fixedly connected to the end of the push-pull rod away from the piston.

[0014] In one embodiment, the bending operation plate structure further includes a hand lever; the hand lever is fixed on the bending operation plate and spaced apart from the rotating portion.

[0015] In one embodiment, the bending operating plate includes two parallel and spaced operating plates and a connecting block connected between the two operating plates; each operating plate has the rotating part and the curved slide; the two rotating parts are coaxially arranged and respectively rotatably connected to the two side walls of the fixed frame; the two curved slides are aligned along the rotation axis direction of the rotating part; there are two sliding rods, which are slidably inserted into the two curved slides.

[0016] In one embodiment, the edge of the operating disk is formed with a plurality of locking teeth along the circumference; the single-section one-way bendable needle holding forceps further includes a bending locking mechanism;

[0017] The bending locking mechanism includes a locking member, a positioning cam, and an elastic member; the locking member is slidably mounted on the fixing frame along the axial direction of the first outer tube structure; the locking member has a locking head at one end facing the bending operating plate, and a locking portion is formed at a position away from the bending operating plate;

[0018] The positioning cam is rotatably mounted on the fixing frame and is located on a side of the locking portion facing away from the bending operating plate; the positioning cam is operably rotated until the circumferential protrusion of the positioning cam abuts against or separates from the locking portion; when the circumferential protrusion of the positioning cam abuts against the locking portion, the locking head is stuck in the locking tooth groove; the elastic member is used to provide an elastic force that drives the locking member to move in a direction toward the bending operating plate.

[0019] In one embodiment, the side of the locking member facing away from the curved operating plate is recessed inward to form an arcuate surface serving as the locking portion; a generatrix of the arcuate surface is parallel to the rotation axis of the cam.

[0020] In one embodiment, a mounting hole is provided on the side wall of the fixing frame; the bending locking mechanism further includes a locking handle; the locking handle has a relative hand-holding section and a mounting end; the mounting end is rotatably inserted into the mounting hole and fixedly connected to one end of the cam.

[0021] In one embodiment, the fixing frame includes a mounting seat and a locking seat; one end of the locking seat is detachably connected to the handle operating mechanism, and the other end is fixedly connected to the mounting seat; the end of the mounting seat away from the locking seat is fixedly connected to one end of the first outer tube structure;

[0022] A connecting hole is provided on the side wall of the locking seat; the mounting end is rotatably inserted into the connecting hole; a sliding hole is provided on the end of the locking seat away from the mounting seat; a sliding column is provided on the end of the locking member away from the lock head; the sliding column is slidably inserted into the sliding hole.

[0023] When the above-mentioned single-section one-way bendable needle holding forceps is used, the operator applies a specific force to the bending operating disc structure, and the bending operating disc structure will pull the push-pull rod to drive the piston to move in the first outer tube structure in the direction toward the handle operating mechanism. At the same time, the bending connecting rod will pull the second outer tube structure under the drive of the piston, so that the second outer tube structure rotates relative to the first outer tube structure in the direction toward the first side, so as to change the operating direction and operating position of the forceps head structure in the body cavity. Therefore, the above-mentioned single-section one-way bendable needle holding forceps is easy to operate, and only one person is needed to complete the operation of the lesions in the special parts that are not within the straight line of sight or are blocked by other tissues, and no multiple people are required to cooperate, which can ensure that the surgical incision is small. Therefore, the above-mentioned single-section one-way bendable needle holding forceps is easy to use, can reduce the difficulty of the operation of the lesions in the special parts that are not within the straight line of sight or are blocked by other tissues, shorten the operation time, reduce the surgical wound, and effectively reduce the damage to the patient's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a single-section, one-way bendable needle holding forceps in a preferred embodiment of the present utility model;

[0025] Figure 2 for Figure 1 A cross-sectional view of the remaining structure of the single-section one-way bendable needle holding forceps after removing the handle operating mechanism;

[0026] Figure 3 for Figure 1 A schematic diagram of the installation state between the bending operating disc assembly and the bending locking mechanism in the single-section one-way bendable needle holding forceps is shown;

[0027] Figure 4 for Figure 2 A partial enlarged view of the schematic diagram of the installation state between the bending operating plate assembly and the bending locking mechanism;

[0028] Figure 5 for Figure 1 The structural diagram of the bending operation plate in the single-section one-way bendable needle holding forceps shown;

[0029] Figure 6 for Figure 1 A schematic structural diagram of a locking member in a single-section, one-way, bendable needle holding forceps;

[0030] Figure 7 for Figure 1 A schematic diagram of the state of the bending locking mechanism of the single-section one-way bendable needle holding forceps when it is in a locked state;

[0031] Figure 8 for Figure 1 The diagram shows a state diagram of a bending locking mechanism in a single-section one-way bendable needle holding forceps when the bending locking mechanism is in an unlocked state.

[0032] Explanation of reference numerals: 10, single-section one-way bendable needle holding forceps; 100, handle operating mechanism; 200, fixing frame; 210, mounting hole; 220, mounting seat; 230, locking seat; 231, sliding hole; 300, clamp head assembly; 310, first outer tube structure; 311, first side; 312, second side; 313, bent rear section; 314, rear end outer tube; 3141, avoidance gap; 320, second outer tube structure; 321, bent front section; 3211, first rotation point; 3212, second rotation point; 322, front end outer tube; 330, clamp head structure; 400, bending operation Disk assembly; 410, bent connecting rod; 420, piston; 421, third rotation point; 422, limiting part; 430, push-pull rod; 440, bent operating plate structure; 441, bent operating plate; 4411, rotating part; 4412, curved slide groove; 4413, operating plate; 4414, connecting block; 4415, locking tooth groove; 442, slide seat; 4421, slide rod; 443, hand lever; 500, bent locking mechanism; 510, locking member; 511, locking head; 512, locking part; 513, slide column; 520, cam; 530, elastic member; 540, locking handle. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also exist. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also exist.

[0036] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0037] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0038] See also Figure 1 The single-section one-way bendable needle holding forceps 10 in a preferred embodiment of the present invention includes a handle operating mechanism 100, a fixing frame 200, a forceps head assembly 300, and a bending operation plate assembly 400. The handle operating mechanism 100 is mounted on the fixing frame 200.

[0039] Please also refer to Figure 2 The clamp head assembly 300 includes a first outer tube structure 310, a second outer tube structure 320, and a clamp head structure 330. One end of the first outer tube structure 310 is connected to the fixing frame 200, and the other end is rotatably connected to one end of the second outer tube structure 320. The end of the second outer tube structure 320 away from the first outer tube structure 310 is connected to the clamp head structure 330. The first outer tube structure 310 has a first side 311 and a second side 312 opposite to each other. The direction of the line connecting the first side 311 and the second side 312 is perpendicular to the axial direction of the first outer tube structure 310. The specific orientation and position of the first side 311 and the second side 312 are not limited thereto.

[0040] Please also refer to Figure 3 and Figure 4 The bending control assembly 400 includes a bending connecting rod 410, a piston 420, a push-pull rod 430, and a bending control structure 440. The bending connecting rod 410 is rotatably connected to the second outer tube structure 320 at one end and to the piston 420 at the other end. The piston 420 is slidably disposed within the first outer tube structure 310. The push-pull rod 430 is disposed within the first outer tube structure 310, with one end connected to the piston 420 and the other end interlocking with the bending control structure 440.

[0041] The curved operating plate structure 440 is configured to push or pull the push-pull rod 430 under the action of an external force, thereby driving the piston 420 to move back and forth within the first outer tube structure 310, thereby pulling or pushing the second outer tube structure 320 to rotate toward or away from the first side 311 through the curved connecting rod 410. The curved operating plate structure 440 can be a connecting rod mechanism, an eccentric rotating disk structure, or other linkage structure capable of driving the push-pull rod 430 to move back and forth within the first outer tube structure 310 under human power.

[0042] When surgery is required on a lesion in a special part that is not within a straight line or is blocked by other tissues, the operator applies a specific force to the bending operating disc structure 440, and the bending operating disc structure 440 will pull the push-pull rod 430 to drive the piston 420 to move in the first outer tube structure 310 in the direction toward the handle operating mechanism 100. At the same time, the bending connecting rod 410 will pull the second outer tube structure 320 under the drive of the piston 420, so that the second outer tube structure 320 rotates relative to the first outer tube structure 310 in the direction toward the first side 311 to change the operating direction and operating position of the clamp head structure 330 in the body cavity, so that the clamp head structure 330 can achieve an ideal grasping and cutting angle. Therefore, the above-mentioned single-section one-way bendable needle holding forceps 10 is simple to operate, and only one person is needed to complete the surgery on lesions in special parts that are not within a straight line of sight or are blocked by other tissues. There is no need for the cooperation of multiple people, which can ensure that the surgical incision is smaller. Therefore, the above-mentioned single-section one-way bendable needle holding forceps 10 is easy to use, can reduce the difficulty of surgery for lesions in special parts that are not within the straight line of sight or are blocked by other tissues, shorten the operation time, reduce the surgical wound, and effectively reduce damage to the patient's body.

[0043] In some embodiments, the first outer tube structure 310 includes a curved rear section 313 and a rear outer tube 314 having one end fixedly connected to one end of the curved rear section 313. The end of the rear outer tube 314, which is away from the curved rear section 313, is connected to the fixing frame 200. The second outer tube structure 320 includes a curved front section 321 and a front outer tube 322 having one end fixedly connected to the curved front section 321.

[0044] During the processing, the bent front section 321 can be connected to the front end outer tube 322 of different lengths, and the bent rear section 313 can be connected to the rear end outer tube 314 of different lengths to obtain single-section one-way bendable needle holders 10 of different specifications, so as to reduce the processing cost during the processing of single-section one-way bendable needle holders 10 of various specifications.

[0045] The front bending section 321 has a first pivot point 3211 and a second pivot point 3212. The end of the front outer tube 322 away from the front bending section 321 is connected to the clamp head structure 330. The piston 420 is slidably disposed within the rear bending section 313 and has a third pivot point 421. The first pivot point 3211 is rotatably connected to the end of the rear bending section 313 away from the rear outer tube 314. The two ends of the bending connecting rod 410 are rotatably connected to the second pivot point 3212 and the third pivot point 421, respectively. On the rotation plane of the bending connecting rod 410, the first pivot point 3211, the second pivot point 3212, and the third pivot point 421 are arranged in a triangular pattern, with the first pivot point 3211 located between the second pivot point 3212 and the third pivot point 421.

[0046] The first rotation point 3211, the second rotation point 3212 and the third column are distributed in a triangular shape on the rotation plane of the bending link 410, so that a triangular support structure is formed between the bending link 410, the front bending section 321 and the rear bending section 313 to ensure the structural stability of the second outer tube structure 320 when it is bent relative to the first outer tube structure 310, thereby improving the stability of the clamp head structure 330 during surgery, making the surgical process more reliable and safe.

[0047] Furthermore, in some embodiments, a sidewall of the bent rear section 313 facing the first side 311 is provided with a relief notch 3141. The piston 420 has a limiting portion 422. The limiting portion 422 extends into the relief notch 3141. The third rotation point 421 is located on the limiting portion 422.

[0048] In this way, the limiting notch cooperates with the limiting portion 422 to limit the extreme position of the piston 420 when sliding away from the second outer tube structure 320. This prevents the second outer tube structure 320 from excessively rotating and causing the elbow structure to damage healthy tissue within the human body cavity during surgery, further improving surgical safety. Furthermore, the provision of the limiting notch allows the curved connecting rod 410 to be positioned outside the first and second outer tube structures 310, 320, reducing the diameters of the first and second outer tube structures 310, 320 and facilitating a reduction in the manufacturing costs of the first and second outer tube structures 310, 320.

[0049] In some embodiments, the bending control plate structure 440 includes a bending control plate 441 and a slide 442. The bending control plate 441 has a rotating portion 4411. The rotating portion 4411 is rotatably connected to the fixed frame 200. The bending control plate 441 has a curved groove 4412 formed along its rotational direction, which gradually approaches the rotating portion 4411. The slide 442 has a slide rod 4421 formed on it. The slide rod 4421 is slidably disposed within the curved groove 4412. One end of the slide 442 is fixedly connected to the end of the push-pull rod 430 away from the piston 420.

[0050] In actual use, when the second outer tube structure 320 needs to be rotated toward the first side 311, the operator manually rotates the bending operating plate 441 in the forward direction. At this time, the sliding rod 4421 slides in the curved sliding groove 4412 in a direction gradually approaching the rotating portion 4411, thereby driving the push-pull rod 430 to pull the piston 420 to move in the first outer tube structure 310 in a direction toward the handle operating mechanism 100 until the second outer tube structure 320 rotates to a preset angle.

[0051] When the second outer tube structure 320 needs to be rotated to be coaxial with the first outer tube structure 310, the operator manually rotates the bending operation plate 441 in the opposite direction. At this time, the slide rod 4421 slides in the curved slide groove 4412 in a direction gradually away from the rotating part 4411, so as to drive the push-pull rod 430 to push the piston 420 in the first outer tube structure 310 in the direction toward the second outer tube structure 320 until the second outer tube structure 320 rotates to be coaxial with the first outer tube structure 310.

[0052] Furthermore, in some embodiments, the bending operation plate structure 440 further includes a handle 443. The handle 443 is fixed to the bending operation plate 441 and spaced apart from the rotating portion 4411. The handle 443 can be fixed transversely to the surface of the bending operation plate 441 and spaced apart from the rotating portion 4411, or can be fixed longitudinally to the peripheral surface of the bending operation plate 441.

[0053] During actual use, the operator can achieve forward or reverse rotation of the bending operation plate 441 by pulling the handle 443, making the operation of the single-section one-way bendable needle holding forceps 10 easier, and further reducing the difficulty of surgery on lesions in special parts that are not within the straight line of sight or are blocked by other tissues.

[0054] Please also refer to Figure 5 Furthermore, in some embodiments, the bending operation plate 441 includes two parallel and spaced operation plates 4413 and a connecting block 4414 connected between the two operation plates 4413. Each operation plate 4413 has a rotating portion 4411 and a curved slide 4412. The two rotating portions 4411 are coaxially arranged and rotatably connected to the two side walls of the fixed frame 200. The two curved slides 4412 are aligned along the rotation axis of the rotating portion 4411. There are two slide rods 4421, each of which is slidably inserted into the two curved slides 4412.

[0055] In this way, two points of support are formed between the two rotating parts 4411 and the fixed frame 200, improving the structural stability of the bending control plate 441 on the fixed frame 200. The two sliding rods 4421 slide within the two curved sliding grooves 4412, respectively, improving the stability of the bending control plate 441 during rotation, thereby enabling the single-section, one-way, bendable needle holding forceps 10 to stably and accurately adjust the angle between the second outer tube structure 320 and the first outer tube structure 310. In addition, the two operating plates 4413 and connecting block 4414 provided on the bending control plate 441 not only improve the connection stability between the bending control plate 441 and the fixed frame 200, but also ensure stable rotation of the bending control plate 441, while also providing a larger space within the bending control plate 441 to facilitate the installation of structures such as the forceps rod.

[0056] Specifically, the hand lever 443 is fixed on the outside of the connecting block 4414. Of course, in other embodiments, the hand lever 443 can also be fixed on the outer disk surface or peripheral surface of the operating panel 4413.

[0057] Please refer again Figure 3 Furthermore, in some embodiments, a plurality of locking tooth grooves 4415 are formed along the circumferential direction on the edge of the operating disk 4413. The single-section one-way bendable needle holding forceps 10 further includes a bending locking mechanism 500.

[0058] Please also refer to Figure 6 The bend locking mechanism 500 includes a locking member 510, a positioning cam 520, and an elastic member 530. The locking member 510 is slidably mounted on the fixing frame 200 along the axial direction of the first outer tube structure 310. The locking member 510 has a locking head 511 at one end facing the bend operating plate 441 and a locking portion 512 at a position facing away from the bend operating plate 441.

[0059] The positioning cam 520 is rotatably mounted on the fixing frame 200 and is located on the side of the locking portion 512 facing away from the bending operation plate 441. The positioning cam 520 can be operatively rotated until the circumferential protrusion of the positioning cam 520 abuts or separates from the locking portion 512. When the circumferential protrusion of the positioning cam 520 abuts the locking portion 512, the locking head 511 engages with the locking tooth groove 4415. The elastic member 530 is used to provide an elastic force that drives the locking member 510 toward the bending operation plate 441.

[0060] Please also refer to Figure 7 When the angle between the second outer tube structure 320 and the first outer tube structure 310 needs to be adjusted, the positioning cam 520 rotates until the circumferential protrusion of the positioning cam 520 leaves the locking portion 512. At this time, when the operator rotates the bending operating plate 441, the locking head 511 of the locking member 510 will slide out of the current locking tooth groove 4415. Then, the locking head 511 of the locking member 510 slides into the next locking tooth groove 4415 under the elastic force provided by the elastic member 530, and so on, until the second outer tube structure 320 is rotated into place and the locking head 511 of the locking member 510 is stuck in the corresponding locking tooth groove 4415.

[0061] Please also refer to Figure 8 When the angle between the second outer tube structure 320 and the first outer tube structure 310 is adjusted to the right position, the positioning cam 520 is rotated until the circumferential protrusion of the positioning cam 520 is against the locking portion 512, so as to press the locking head 511 of the locking member 510 into the corresponding locking tooth groove 4415, so as to prevent the bending operation disk 441 of the single-section one-way bendable needle holding forceps 10 from continuing to rotate during use, thereby locking the bending operation disk 441 and improving the stability and reliability of the single-section one-way bendable needle holding forceps 10 during surgery.

[0062] Furthermore, in some embodiments, the side of the locking member 510 facing away from the bending operating plate 441 is recessed inward to form an arcuate surface serving as the locking portion 512. The generatrix of the arcuate surface is parallel to the rotation axis of the cam 520. Setting the locking portion 512 as an inwardly recessed arcuate surface not only facilitates the sliding in and out of the circumferential protrusion of the cam 520 within the arcuate surface, making the locking action more smooth and silky, but also reduces the probability of the circumferential protrusion of the cam 520 being separated from the locking portion 512 when the single-section, one-way bendable needle holding forceps 10 shakes or collides with other objects in the locked state, making the structure of the bending locking mechanism 500 more stable when in the locked state, thereby improving the reliability of the single-section, one-way bendable needle holding forceps 10.

[0063] Of course, in other embodiments, the locking portion 512 may also be a plane on the locking member 510 that is away from the bending operating plate 441 , or a protruding structure formed on the locking member 510 that is away from the bending operating plate 441 , etc.

[0064] Please refer again Figure 2 and Figure 3 Furthermore, in some embodiments, a mounting hole 210 (not shown) is defined in the sidewall of the fixing frame 200. The bending locking mechanism 500 further includes a locking handle 540. One end of the locking handle 540 is rotatably inserted into the mounting hole 210 and fixedly connected to one end of the cam 520.

[0065] During use, the operator rotates the cam 520 by pulling the locking handle 540 to facilitate switching the bending locking mechanism 500 between the locked state and the unlocked state, further improving the ease of use of the single-section, one-way bendable needle holding forceps 10.

[0066] Furthermore, in some embodiments, the fixing frame 200 includes a mounting base 220 and a locking base 230. One end of the locking base 230 is detachably connected to the handle operating mechanism 100, and the other end is fixedly connected to the mounting base 220. The end of the mounting base 220 away from the locking base 230 is fixedly connected to one end of the first outer tube structure 310.

[0067] The side wall of the locking seat 230 is provided with a mounting hole 210. The end of the locking seat 230 away from the mounting seat 220 is provided with a sliding hole 231. The end of the locking member 510 away from the lock head 511 has a sliding post 513. The sliding post 513 is slidably provided in the sliding hole 231.

[0068] The fixing frame 200 is divided into two parts, the mounting seat 220 and the locking seat 230, and is molded separately to reduce the processing difficulty of the fixing frame 200 and improve the processing accuracy. At the same time, it facilitates the installation of structures such as the bending locking mechanism 500 and the bending operating plate 441 in the fixing frame 200, further reducing the processing difficulty of the single-section one-way bendable needle holding forceps 10.

[0069] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A single-section, one-way bendable needle holding forceps, characterized in that: It includes a handle operating mechanism, a fixing frame, a clamp head assembly and a bending operation plate assembly; the handle operating mechanism is installed on the fixing frame; The clamp head assembly includes a first outer tube structure, a second outer tube structure, and a clamp head structure; one end of the first outer tube structure is connected to the fixing frame, and the other end is rotatably connected to one end of the second outer tube structure; an end of the second outer tube structure away from the first outer tube structure is connected to the clamp head structure; the first outer tube structure has a first side and a second side opposite to each other; The bending operation plate assembly includes a bending connecting rod, a piston, a push-pull rod, and a bending operation plate structure; one end of the bending connecting rod is rotatably connected to the second outer tube structure, and the other end is rotatably connected to the piston; the piston is slidably arranged in the first outer tube structure; the push-pull rod is arranged in the first outer tube structure, one end is connected to the piston, and the other end is linked to the bending operation plate structure; The curved operating plate structure is constructed to be able to push or pull the push-pull rod under the action of external force to drive the piston to move back and forth in the first outer tube structure, so as to pull or push the second outer tube structure to rotate toward or away from the first side through the curved connecting rod.

2. The single-section, one-way, bendable needle holding forceps according to claim 1, characterized in that: The first outer tube structure includes a curved rear section and a rear outer tube with one end fixedly connected to one end of the curved rear section; the rear outer tube is connected to the fixing frame at one end away from the curved rear section; The second outer tube structure includes a bending front section and a front outer tube with one end fixedly connected to the bending front section; the bending front section has a first rotation point and a second rotation point; the end of the front outer tube away from the bending front section is connected to the clamp head structure; The piston is slidably disposed in the curved rear section and has a third rotation point; the first rotation point is rotatably connected to an end of the curved rear section away from the rear end outer tube; the two ends of the curved connecting rod are rotatably connected to the second rotation point and the third rotation point respectively; On the rotation plane of the curved link, the first rotation point, the second rotation point, and the third rotation point are distributed in a triangle, and the first rotation point is located between the second rotation point and the third rotation point.

3. The single-section, one-way, bendable needle holding forceps according to claim 2, characterized in that: The side wall of the bent rear section facing the first side is provided with an avoidance notch; the piston has a limiting portion; the limiting portion extends into the avoidance notch; and the third rotation point is located on the limiting portion.

4. The single-section, one-way, bendable needle holding forceps according to claim 1, characterized in that: The bending operation plate structure includes a bending operation plate and a slide; the bending operation plate has a rotating part; the rotating part is rotatably connected to the fixed frame; the bending operation plate forms a curved slide groove gradually approaching the rotating part along its rotation direction; a slide rod is formed on the slide; the slide rod is slidably arranged in the curved slide groove; one end of the slide is fixedly connected to the end of the push-pull rod away from the piston.

5. The single-section, one-way, bendable needle holding forceps according to claim 4, characterized in that: The bending operation plate structure further includes a hand lever; the hand lever is fixed on the bending operation plate and is spaced apart from the rotating part.

6. The single-section, one-way, bendable needle holding forceps according to claim 4, characterized in that: The bending operating plate includes two parallel and spaced operating plates and a connecting block connected between the two operating plates; each operating plate has the rotating part and the curved slide; the two rotating parts are coaxially arranged and respectively rotatably connected to the two side walls of the fixed frame; the two curved slides are aligned along the rotating axis direction of the rotating part; there are two sliding rods, which are respectively slidably inserted into the two curved slides.

7. The single-section, one-way, bendable needle holding forceps according to claim 6, characterized in that: The edge of the operating disk is formed with a plurality of locking teeth along the circumferential direction; the single-section one-way bendable needle holding forceps also includes a bending locking mechanism; The bending locking mechanism includes a locking member, a positioning cam, and an elastic member; the locking member is slidably mounted on the fixing frame along the axial direction of the first outer tube structure; the locking member has a locking head at one end facing the bending operating plate, and a locking portion is formed at a position away from the bending operating plate; The positioning cam is rotatably mounted on the fixing frame and is located on a side of the locking portion facing away from the bending operating plate; the positioning cam is operably rotated until the circumferential protrusion of the positioning cam abuts against or separates from the locking portion; when the circumferential protrusion of the positioning cam abuts against the locking portion, the locking head is stuck in the locking tooth groove; the elastic member is used to provide an elastic force that drives the locking member to move in a direction toward the bending operating plate.

8. The single-section, one-way, bendable needle holding forceps according to claim 7, characterized in that: The side of the locking member facing away from the curved operating plate is recessed inward to form an arcuate surface serving as the locking portion; a generatrix of the arcuate surface is parallel to the rotating shaft of the cam.

9. The single-section, one-way, bendable needle holding forceps according to claim 7, characterized in that: A mounting hole is provided on the side wall of the fixing frame; the bending locking mechanism further comprises a locking handle; the locking handle comprises a relative hand-holding section and a mounting end; the mounting end is rotatably inserted into the mounting hole and fixedly connected to one end of the cam.

10. The single-section, one-way, bendable needle holding forceps according to claim 9, characterized in that: The fixing frame includes a mounting seat and a locking seat; one end of the locking seat is detachably connected to the handle operating mechanism, and the other end is fixedly connected to the mounting seat; the end of the mounting seat away from the locking seat is fixedly connected to one end of the first outer tube structure; A connecting hole is provided on the side wall of the locking seat; the mounting end is rotatably inserted into the connecting hole; a sliding hole is provided on the end of the locking seat away from the mounting seat; a sliding column is provided on the end of the locking member away from the lock head; the sliding column is slidably inserted into the sliding hole.

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