Puncture needle clamp

Abstract

A puncture needle clamp comprises a first clamping jaw, a second clamping jaw, a first connecting rod, a second connecting rod, a third connecting rod, a threaded rod, a rotating disc and a mounting frame. The first clamping jaw and the second clamping jaw are hinged to the mounting frame, one end of the first clamping jaw is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to one end of the third connecting rod, one end of the second clamping jaw is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the other end of the third connecting rod; the threaded end of the threaded rod is in threaded connection with the threaded hole, and the other end of the threaded rod is connected with the circle center of the rotary disc. Compared with the prior art, the third connecting rod is driven to move back and forth through forward and reverse rotation of the rotating disc, so that closing and opening of the clamping jaw are achieved, and it is guaranteed that a puncture needle can be effectively fixed. And secondly, the inwards-concave clamping grooves in the first clamping jaw and the second clamping jaw and the inwards-concave curved surface on the limiting piece can tightly wrap the ball joint, and the clamping effect is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a puncture needle clamp. Background Art

[0002] Many surgical procedures involve the percutaneous insertion of a needle into a patient's body for biopsy and drug delivery, including placing the needle tip into a lesion, organ, or blood vessel in the body to perform a medical procedure. Examples of surgical procedures that require the insertion of a needle include vaccination, blood / fluid sampling, regional anesthesia, tissue biopsy, catheterization, cryoablation, electrolytic ablation, brachytherapy, neurosurgery, deep brain stimulation, and various minimally invasive surgeries (MIS).

[0003] There are currently several methods for inserting a needle into a patient during the above-mentioned surgical procedure. One is for the surgeon to manually perform the process by placing one end of the needle on the patient's skin and repeatedly tilting the other end of the needle based on real-time imaging data to establish alignment between the needle and the target. However, this method is susceptible to human error, and patients and surgical personnel may be exposed to excessive X-ray radiation, posing a potential human hazard. Another method has also proposed surgical automation, introducing medical device systems such as robotic arms (robots) to simulate manual surgical procedures.

[0004] The Chinese utility model patent with publication number CN217611296U discloses a clamp and a puncture robot for puncture, wherein the clamp drives a cam to rotate by rotating a knob to push the relatively arranged clamp head to close the jaws, and opens the jaws by the elasticity of a torsion spring. The disadvantage of the above clamp is that the abutment surface of the clamp head is easily worn for a long time, resulting in limit failure, thereby reducing the clamping force of the jaws, and failing to ensure that the puncture needle is effectively fixed. Summary of the invention

[0005] The utility model provides a puncture needle clamp to solve the technical problem in the prior art that the abutting surface of the clamp head is easily subject to limit failure due to long-term wear, thereby reducing the clamping force of the jaws and failing to ensure that the puncture needle is effectively fixed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0007] A puncture needle clamp, comprising a first clamping jaw, a second clamping jaw, a first connecting rod, a second connecting rod, a third connecting rod, a threaded rod, a turntable and a mounting frame; the first clamping jaw and the second clamping jaw are both hinged to the mounting frame, one end of the first clamping jaw is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to one end of the third connecting rod, one end of the second clamping jaw is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the other end of the third connecting rod; a threaded hole is provided in the middle of the third connecting rod, one end of the threaded rod having a thread is threadedly connected to the threaded hole, and the other end is connected to the center of the turntable; a through hole is provided on the mounting frame, and the turntable is located in the through hole;

[0008] The first clamping jaw and the second clamping jaw each comprise a clamping portion, a rotating portion, and a pin located between the clamping portion and the rotating portion; the first clamping jaw and the second clamping jaw are hinged to the mounting frame through the pin; the rotating portions of the first clamping jaw and the second clamping jaw are hinged to the first connecting rod and the second connecting rod respectively;

[0009] The clamping portion is in an arc shape; a clamping groove is provided on the inner side of the clamping portion, and the clamping groove is an inwardly concave curved surface; a limiting member is also provided between the clamping portion and the third connecting rod, and the limiting member is installed on the mounting frame.

[0010] Thus, the forward and reverse rotation of the turntable drives the third connecting rod to move forward and backward, thereby realizing the closing and opening of the clamping jaws, thereby ensuring that the puncture needle can be effectively fixed. Secondly, the turntable and the threaded rod are limited by the through hole, so that the threaded end of the threaded rod does not need to be provided with a separate limiting mechanism, thereby simplifying the overall structure. Thirdly, the turntable is installed on the mounting frame, making the structure more compact and the operation more convenient. Thirdly, the clamping groove is used to clamp the ball joint, and the ball joint is used to install the puncture needle. The clamping groove with an inwardly concave curved surface can better fit the ball joint, so that the clamping effect of the clamping jaws is better. Thirdly, since the ball joint is usually made of elastic material, the ball joint is supported by a limiting member, which can prevent the ball joint from being squeezed and deformed when clamped by the first clamping jaw and the second clamping jaw, thereby preventing the position of the puncture needle from being shifted.

[0011] In some embodiments, the mounting frame includes an upper mounting frame and a lower mounting frame, and the first clamping jaw, the second clamping jaw, the first connecting rod, the second connecting rod, the third connecting rod and the threaded rod are all clamped between the upper mounting frame and the lower mounting frame.

[0012] In some embodiments, the first clamp includes a long arm and a short arm; one end of the long arm is vertically connected to one end of the short arm; the other end of the long arm is provided with the clamping part, and the other end of the short arm is provided with the rotating part, and the pin shaft is located at the connection between the long arm and the short arm.

[0013] In some embodiments, the side surface of the turntable is provided with anti-slip teeth along its circumference.

[0014] In some embodiments, the side of the stopper facing the clamping portion is an inwardly concave curved surface. Thus, when the first clamping jaw and the second clamping jaw are closed to clamp the ball joint, the inwardly concave clamping grooves on the first clamping jaw and the second clamping jaw and the inwardly concave curved surface on the stopper can tightly wrap the ball joint, further enhancing the clamping effect.

[0015] The utility model has at least the following technical effects or advantages: the third connecting rod is driven to move forward and backward by the forward and reverse rotation of the turntable to achieve the closing and opening of the clamping jaws, thereby ensuring that the puncture needle can be effectively fixed. Secondly, the turntable and the threaded rod are limited by the through hole, so that the threaded end of the threaded rod does not need to be provided with a limiting mechanism, thereby simplifying the overall structure. Thirdly, the turntable is installed on the mounting frame, making the structure more compact and more convenient to operate. Thirdly, since the ball joint is usually made of elastic material, the ball joint is supported by the limiting member, which can prevent the ball joint from being squeezed and deformed when clamped by the first clamping jaw and the second clamping jaw, thereby preventing the position of the puncture needle from shifting. Thirdly, the inwardly concave clamping grooves on the first clamping jaw and the second clamping jaw and the inwardly concave curved surface on the limiting member can tightly wrap the ball joint, further enhancing the clamping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a puncture needle clamp in an embodiment of the utility model (with the clamping jaws closed);

[0017] Figure 2 This is a structural schematic diagram of a puncture needle clamp in an embodiment of the utility model (with the clamping jaws open);

[0018] Figure 3 This is a schematic diagram of the internal structure of a puncture needle clamp in an embodiment of the utility model (with the clamping jaws closed);

[0019] Figure 4 This is a schematic diagram of the internal structure of a puncture needle clamp in one embodiment of the utility model (with the clamping jaws open);

[0020] Figure 5 This is an exploded schematic diagram of a puncture needle clamp in one embodiment of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the lower mounting frame in one embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] See also Figure 1-Figure 6 A puncture needle clamp includes a first clamping jaw 11, a second clamping jaw 12, a first connecting rod 21, a second connecting rod 22, a third connecting rod 23, a threaded rod 3, a rotating disk 4 and a mounting frame 5.

[0024] The first clamping jaw 11 includes a long arm and a short arm, one end of the long arm is vertically connected to one end of the short arm; the other end of the long arm is provided with a clamping portion, the other end of the short arm is provided with a rotating portion, and a pin 13 is provided at the connection between the long arm and the short arm. The structure of the second clamping jaw 12 is exactly the same as that of the first clamping jaw, and will not be repeated.

[0025] The first clamping jaw 11 and the second clamping jaw 12 are hinged to the mounting frame 5 through the pin 13. The rotating part of the first clamping jaw 11 is hinged to one end of the first connecting rod 21, and the other end of the first connecting rod 21 is hinged to one end of the third connecting rod 23. The rotating part of the second clamping jaw 12 is hinged to one end of the second connecting rod 22, and the other end of the second connecting rod 22 is hinged to the other end of the third connecting rod 23. A threaded hole is provided in the middle of the third connecting rod 23, and one end of the threaded rod 3 with a thread is threadedly connected to the threaded hole, and the other end is connected to the center of the rotating disk 4. A through hole 53 is provided on the mounting frame 5, and the rotating disk 4 is located in the through hole 53.

[0026] The clamping portion is in an arc shape, and a clamping groove 6 is provided on the inner side of the clamping portion. The clamping groove 6 is an inwardly concave curved surface.

[0027] A limiting member 7 is further provided between the clamping portion and the third connecting rod 23, and the limiting member 7 is mounted on the mounting frame 5. More preferably, a side of the limiting member 7 facing the clamping portion is an inwardly concave curved surface.

[0028] As a preferred solution, the mounting frame 5 includes an upper mounting frame 51 and a lower mounting frame 52, and the first clamping jaw 11, the second clamping jaw 12, the first connecting rod 21, the second connecting rod 22, the third connecting rod 23 and the threaded rod 3 are all clamped between the upper mounting frame 51 and the lower mounting frame 52. The upper mounting frame 51 and the lower mounting frame 52 can be installed together in the form of a snap connection. More preferably, the limiting member 7 is divided into an upper and lower part, which are respectively installed on the upper mounting frame 51 and the lower mounting frame 52. The limiting member 7 can also be integrally formed with the mounting frame, that is, the limiting member of the upper half is integrally formed with the upper mounting frame 51, and the limiting member of the lower half is integrally formed with the lower mounting frame 52. When the upper mounting frame 51 is engaged with the lower mounting frame 52, the limiting members of the upper and lower parts are also engaged to form a complete limiting member 7.

[0029] As a preferred solution, the side surface of the rotating disk 4 is provided with anti-slip teeth 41 along its circumference.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A puncture needle clamp, characterized in that: The invention comprises a first clamping jaw, a second clamping jaw, a first connecting rod, a second connecting rod, a third connecting rod, a threaded rod, a rotating disk and a mounting frame; the first clamping jaw and the second clamping jaw are both hinged to the mounting frame, one end of the first clamping jaw is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to one end of the third connecting rod, one end of the second clamping jaw is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the other end of the third connecting rod; a threaded hole is provided in the middle of the third connecting rod, one end of the threaded rod having a thread is threadedly connected to the threaded hole, and the other end is connected to the center of the rotating disk; a through hole is provided on the mounting frame, and the rotating disk is located in the through hole; The first clamp and the second clamp each include a clamping portion, a rotating portion, and a pin shaft located between the clamping portion and the rotating portion; the first clamp and the second clamp are hinged to the mounting frame via the pin shaft; the rotating portions of the first clamp and the second clamp are hinged to the first connecting rod and the second connecting rod respectively; the clamping portion is arc-shaped; a clamping groove is provided on the inner side of the clamping portion, and the clamping groove is an inwardly concave curved surface; a limit member is also provided between the clamping portion and the third connecting rod, and the limit member is installed on the mounting frame.

2. The puncture needle clamp according to claim 1, characterized in that: The mounting frame comprises an upper mounting frame and a lower mounting frame, and the first clamping jaw, the second clamping jaw, the first connecting rod, the second connecting rod, the third connecting rod and the threaded rod are all clamped between the upper mounting frame and the lower mounting frame.

3. The puncture needle clamp according to claim 1, characterized in that: The first clamping jaw includes a long arm and a short arm; one end of the long arm is vertically connected to one end of the short arm; the other end of the long arm is provided with the clamping part, and the other end of the short arm is provided with the rotating part, and the pin shaft is located at the connection between the long arm and the short arm; the structure of the second clamping jaw is exactly the same as that of the first clamping jaw.

4. The puncture needle clamp according to claim 1, characterized in that: The side surface of the rotating disk is provided with anti-skid teeth along its circumference.

5. The puncture needle clamp according to claim 1, characterized in that: A side of the limiting member facing the clamping portion is an inwardly concave curved surface.

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