Needle insertion angle adjustment device

Abstract

The application provides a needle insertion angle adjusting device and relates to the technical field of medical devices, in particular to a device specifically comprising a base, a connecting rod adjusting mechanism, a fine adjustment mechanism and a clutch mechanism; the application forms a virtual fixed point through the connecting rod adjusting mechanism, so that the needle point coincides with the virtual fixed point to fix the position of the puncture point of the needle body, avoid the deviation of the puncture point and ensure the puncture accuracy; during the puncture process, the application can be combined with CT scanning to observe whether the needle insertion angle deviates; when the needle insertion angle deviates, the clutch pipe is driven to rotate the needle insertion part through the rotation knob, so that the needle insertion angle is adjusted; during the adjustment process, the scale component can be observed to realize the real-time and accurate adjustment of the needle insertion angle, so that the needle insertion angle meets the puncture angle, multiple punctures are not needed and the subjective experience of the operator is not needed, and the puncture accuracy and efficiency are high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a needle insertion angle adjusting device. BACKGROUND

[0002] CT-guided percutaneous lung biopsy is increasingly widely used for early screening of lung nodules and tumor diseases. The operator finds the specific position of the lung nodule through the CT image, and then confirms the needle insertion position and angle before performing the manual puncture action.

[0003] At present, the puncture needle used in the clinic only provides the needle insertion depth and cannot provide the needle insertion angle. There is a technical solution to add an angle indicator to the tail of the traditional puncture needle to prompt the actual needle insertion angle of the operator during puncture, but the angle indicator increases the weight of the tail of the puncture needle, which easily causes the needle body to bend and droop under the action of gravity, affecting the puncture precision. Moreover, in actual operation, the patient will inevitably move during the puncture process, causing the parameters obtained by image analysis to deviate, and these deviations also reduce the puncture precision, and the operator currently relies on multiple adjustments of the puncture angle to achieve puncture in place.

[0004] However, the multiple adjustment of the puncture angle relies too much on the subjective experience of the operator, is low in efficiency, and is prone to errors. SUMMARY

[0005] The present application aims to provide a needle insertion angle adjusting device to alleviate the technical problem that the multiple adjustment of the puncture angle relies too much on the subjective experience of the operator, is low in efficiency, and is prone to errors in the prior art.

[0006] The present application provides a needle insertion angle adjusting device, comprising a base, a connecting rod adjusting mechanism, a fine adjustment mechanism, and a clutch mechanism; the base has a mounting portion; the connecting rod adjusting mechanism has a needle insertion portion for inserting a needle body, one side of the connecting rod adjusting mechanism is formed with a virtual fixed point, one end of the needle insertion portion is provided with a needle exit point coinciding with the virtual fixed point, the needle exit point is used for inserting a needle tip, the needle insertion portion rotates in the same vertical plane as the connecting rod adjusting mechanism and the position of the needle exit point remains unchanged; the fine adjustment mechanism comprises a knob and a scale assembly, the knob is arranged on one side of the connecting rod adjusting mechanism, and the scale assembly is arranged opposite to the knob to record the rotation angle of the knob; the clutch mechanism comprises a clutch pipe and a clutch wheel, the clutch pipe is arranged on one side of the fine adjustment mechanism, the clutch pipe is in transmission connection with the connecting rod adjusting mechanism to drive the needle insertion portion to rotate, and the clutch wheel is in transmission connection with the clutch pipe to make the clutch pipe in transmission connection or disconnected transmission connection with the knob; the base, the connecting rod adjusting mechanism, the fine adjustment mechanism, and the clutch mechanism are all made of non-metal materials that do not affect the CT imaging quality.

[0007] Further, the fine adjustment mechanism further comprises a lead screw, a lead screw nut, a driving wheel and a transmission cable; the lead screw is arranged on the mounting portion and is in transmission connection with the knob; the lead screw nut is arranged on the lead screw and is in thread cooperation with the lead screw; the driving wheel is arranged on one side of the lead screw and is in transmission connection with the connecting rod adjustment mechanism; the transmission cable is connected with the driving wheel and the lead screw nut respectively, so that the lead screw nut can pull the transmission cable to drive the driving wheel to rotate, thereby driving the connecting rod adjustment mechanism to rotate.

[0008] Further, the fine adjustment mechanism further comprises at least one transmission wheel, and the transmission cable passes through the transmission wheel to change its moving direction.

[0009] Further, the scale assembly comprises a scale plate and a indicating needle; the scale plate is arranged on one side of the lead screw and has scale marks with the same direction as the extension direction of the lead screw; the indicating needle is in transmission connection with the lead screw nut and can move along the direction of the scale marks.

[0010] Further, the connecting rod adjustment mechanism comprises a driving shaft in transmission connection with the clutch pipe; the driving shaft rotates to drive the needle penetrating portion to rotate with the needle exit point as the center.

[0011] Further, the driving shaft is internally provided with a through hole coaxial with the driving shaft; the clutch mechanism further comprises an adjusting member provided with adjusting threads matched with the clutch wheel on the surface, so that the clutch wheel rotates to drive the adjusting member to move horizontally; the adjusting member is arranged in the through hole; the clutch pipe is arranged on one end of the adjusting member and can rotate along the axial direction of the adjusting member.

[0012] Further, the clutch mechanism further comprises a bearing arranged between the clutch pipe and the adjusting member, so that the clutch pipe can move along with the adjusting member and can rotate.

[0013] Further, the adjusting member is a worm; and the clutch wheel is a turbine.

[0014] Further, the connecting rod adjusting mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod and a sixth connecting rod; the first connecting rod is arranged on the mounting portion and fixedly connected with the mounting portion; the second connecting rod is hingedly connected with the first connecting rod and can rotate in the vertical direction; the third connecting rod is hingedly connected with the first connecting rod and arranged in parallel with the second connecting rod at intervals along the length direction of the first connecting rod, and the end of the third connecting rod away from the second connecting rod is provided with an extension part extending in the direction away from the second connecting rod; the fourth connecting rod is hingedly connected with the second connecting rod and the third connecting rod respectively and arranged in parallel with the first connecting rod; the fifth connecting rod is arranged between the first connecting rod and the third connecting rod and arranged in parallel with the first connecting rod, and one end of the fifth connecting rod is hingedly connected with the fourth connecting rod; the sixth connecting rod is hingedly connected with the extension part and the other end of the fifth connecting rod respectively; wherein the second connecting rod and the third connecting rod are both two, and the two second connecting rods and the two third connecting rods are oppositely arranged on both sides of the first connecting rod and the fourth connecting rod, the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod form a double-sided parallelogram mechanism, the needle penetrating portion is arranged on the sixth connecting rod, and the needle point is located at the end of the sixth connecting rod.

[0015] Further, the end of the sixth connecting rod provided with the needle point is a spherical surface structure.

[0016] Beneficial effects:

[0017] In the application, the virtual fixed point is formed by the connecting rod adjusting mechanism, the needle point is coincided with the virtual fixed point to ensure the position of the puncture point of the needle body fixed, the deviation of the puncture point is avoided, and the puncture precision is ensured. Since the mechanism components of the needle insertion angle adjusting device provided by the application are all non-metal materials which do not affect CT imaging, the puncture angle can be observed in combination with CT imaging, and the CT imaging is not disturbed. In the puncture process, the CT scanning can be combined to observe whether the needle insertion angle deviates, and when the deviation occurs, the needle penetrating portion is rotated by driving the clutch pipe linkage through the knob to adjust the needle insertion angle. During the adjustment process, the reading of the scale assembly can be observed to realize the real-time and accurate adjustment of the needle insertion angle, so that the needle insertion angle meets the puncture angle, multiple punctures are not required, and the subjective experience of the operator is not required, and the puncture precision and efficiency are high. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 Structure diagram of the needle insertion angle adjusting device provided by the embodiment of the present application;

[0020] Figure 2 Structure diagram of the fine adjustment mechanism of the needle insertion angle adjusting device provided by the embodiment of the present application;

[0021] Figure 3 Schematic diagram of the cooperation relationship between the clutch mechanism and the connecting rod adjusting mechanism of the needle insertion angle adjusting device provided by the embodiment of the present application;

[0022] Figure 4 Structure diagram of the connecting rod adjusting mechanism of the needle insertion angle adjusting device provided by the embodiment of the present application;

[0023] Figure 5 Structure diagram of the connecting rod adjusting mechanism of the needle insertion angle adjusting device provided by the embodiment of the present application;

[0024] Figure 6 Structure diagram of the driving shaft of the needle insertion angle adjusting device provided by the embodiment of the present application;

[0025] Figure 7 Structure diagram of the clutch pipe of the needle insertion angle adjusting device provided by the embodiment of the present application.

[0026] Icon:

[0027] 1 - base; 2 - clutch mechanism;

[0028] 201 - mounting groove; 202 - adjusting piece; 203 - clutch wheel; 204 - clutch pipe; 204A - protrusion;

[0029] 3 - puncture needle;

[0030] 4 - connecting rod adjusting mechanism; 401 - first connecting rod; 402 - third connecting rod; 403 - fifth connecting rod; 404 - sixth connecting rod; 404A - needle insertion part; 404B - needle exit point; 405 - fourth connecting rod; 406 - second connecting rod; 407 - virtual fixed point; 408 - driving shaft; 408A - groove;

[0031] 5 - fine adjustment mechanism; 501 - lead screw; 502 - second transmission wheel; 504 - third transmission wheel; 503 - driving wheel; 505 - transmission cable; 506 - scale plate; 507 - scale mark; 508 - indicating needle; 510 - knob; 509 - first transmission wheel; 511 - lead screw nut. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0034] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The present application will be further described in detail below through specific embodiments and in conjunction with the drawings.

[0039] Referring to Figures 1 to 7 The needle insertion angle adjusting device provided by the embodiment comprises a base 1, a connecting rod adjusting mechanism 4, a fine adjustment mechanism 5 and a clutch mechanism 2.

[0040] The base 1 has a mounting portion. The connecting rod adjusting mechanism 4 has a needle passing portion 404A for passing a needle body, one side of the connecting rod adjusting mechanism 4 is formed with a virtual fixed point 407, one end of the needle passing portion 404A is provided with a needle outlet point 404B coinciding with the virtual fixed point 407, the needle outlet point 404B is used for passing a needle tip, the needle passing portion 404A rotates in the same vertical plane with the connecting rod adjusting mechanism 4 and the position of the needle outlet point 404B is unchanged.

[0041] The fine adjustment mechanism 5 comprises a knob 510 and a scale assembly, the knob 510 is arranged on one side of the connecting rod adjusting mechanism 4, and the scale assembly is arranged opposite to the knob 510 to record the rotation angle of the knob 510. The clutch mechanism 2 comprises a clutch pipe 204 and a clutch wheel 203, the clutch pipe 204 is arranged on one side of the fine adjustment mechanism 5, the clutch pipe 204 is in transmission connection with the connecting rod adjusting mechanism 4 to drive the needle passing portion 404A to rotate, and the clutch wheel 203 is in transmission connection with the clutch pipe 204 to make the clutch pipe 204 in transmission connection or disconnected transmission connection with the knob 510.

[0042] In addition, in the embodiment, the base 1, the connecting rod adjusting mechanism 4, the fine adjustment mechanism 5 and the clutch mechanism 2 are all non-metal materials which do not affect the CT imaging quality.

[0043] Specifically, the needle insertion angle adjusting device provided by the embodiment is applied to a puncture operation. Before use, a CT scan is performed on a patient to determine the position of an initial needle insertion point and obtain an initial needle insertion angle.

[0044] After the initial needle insertion point and the initial needle insertion angle are determined, the needle insertion angle adjusting device is placed beside the initial needle insertion point, and the needle outlet point 404B of the needle insertion angle adjusting device is made to coincide with the initial needle insertion point. Then, the needle insertion angle adjusting device is fixed on the surface of the patient by pasting or binding to ensure stable setting of the needle insertion angle adjusting device.

[0045] After the needle insertion angle adjusting device is fixed, the clutch wheel 203 is adjusted to make the clutch pipe 204 in transmission connection with the knob 510. Then, a second CT scan is performed, the inclination angle of the needle passing portion 404A is observed, and the knob 510 is rotated to drive the clutch pipe 204 to rotate the needle passing portion 404A in combination with the scale assembly to adjust the needle insertion angle until the needle insertion angle is the same as the initial needle insertion angle. At this time, puncture is performed.

[0046] When the puncture needle 3 is inserted into the needle insertion part 404A and comes out of the needle exit point 404B, the puncture needle 3 is inserted from the initial needle insertion point and the initial needle insertion angle. Since the needle exit point 404B coincides with the virtual fixed point 407 of the connecting rod adjusting mechanism 4, the position of the puncture point of the puncture needle 3 can be kept fixed to ensure the puncture accuracy.

[0047] During the puncture process, three CT scans are performed. According to the expected puncture end point and the current puncture angle, the scale assembly is used to rotate the knob 510 again to adjust the needle insertion angle to realize angle compensation. After the angle compensation, the puncture action is continued.

[0048] When the needle insertion depth reaches the preset depth, four CT scans are performed to observe whether the puncture is in place. If the puncture is in place, the subsequent processing is continued. If there is deviation in the puncture, the needle is inserted again and the above-mentioned action is repeated.

[0049] It should be noted that the base 1, the connecting rod adjusting mechanism 4, the fine adjustment mechanism 5 and the clutch mechanism 2 can be made of any non-metallic material such as engineering plastic, carbon fiber and ceramic without affecting the CT imaging quality.

[0050] The needle insertion angle adjusting device provided in the embodiment forms an accurate fine adjustment system through the non-metallic connecting rod adjusting mechanism 4, the fine adjustment mechanism 5 and the clutch mechanism 2. The accurate adjustment during the puncture process can be realized in combination with the CT imaging technology. The puncture does not need to be performed multiple times and does not need to rely on the subjective experience of the operator. The puncture accuracy and efficiency are significantly improved.

[0051] In combination Figure 2 In the embodiment, the fine adjustment mechanism 5 further includes a lead screw 501, a lead screw nut 511, a driving wheel 503 and a transmission cable 505. The lead screw 501 is arranged on the mounting part and is in transmission connection with the knob 510. The lead screw nut 511 is arranged on the lead screw 501 and is in threaded cooperation with the lead screw 501. The driving wheel 503 is arranged on one side of the lead screw 501 and is in transmission connection with the connecting rod adjusting mechanism 4. The transmission cable 505 is connected with the driving wheel 503 and the lead screw nut 511 respectively, so that the lead screw nut 511 can pull the transmission cable to drive the driving wheel 503 to rotate, thereby driving the needle insertion part 404A to rotate.

[0052] Specifically, in the embodiment, the knob 510 is connected with the lead screw 501. When the knob 510 rotates, the lead screw 501 can be driven to rotate together, thereby driving the lead screw nut 511 on the lead screw 501 to move along the axial direction of the lead screw 501. The lead screw nut 511 pulls the transmission cable 505 during the movement, thereby driving the driving wheel 503 to rotate. In the state that the clutch pipe 204 is in transmission connection with the driving wheel 503, the clutch pipe 204 rotates with the driving wheel 503, thereby driving the needle insertion part 404A of the connecting rod adjusting mechanism 4 to rotate, to realize the angle adjustment of the puncture needle 3.

[0053] In the embodiment, the transmission cable 505 is connected to the screw rod nut 511 and the driving wheel 503 by welding to avoid slippage during transmission and cause transmission failure.

[0054] The combination of the screw rod 501, the screw rod nut 511, the transmission cable 505 and the driving wheel 503 realizes multiple conversions from rotary motion to linear motion to rotary motion, and can convert the coarse adjustment of the knob 510 into fine adjustment (for example, 0.1° angle compensation for each 1° rotation), thereby realizing accurate adjustment of the needle insertion angle.

[0055] In addition, the transmission structure of the screw rod 501 and the screw rod nut 511 itself has self-locking characteristics, and after adjustment is completed, locking can be formed by the self-locking characteristics of the screw rod 501 and the screw rod nut 511, thereby avoiding accidental angle deviation caused by patient movement or tissue resistance during puncture.

[0056] It should be noted that in the embodiment, the screw rod 501 is a trapezoidal screw rod 501.

[0057] In the embodiment, the fine adjustment mechanism 5 further comprises at least one transmission wheel, and the transmission cable 505 passes through the transmission wheel to change the moving direction thereof.

[0058] The transmission wheel can change the moving direction (i.e., the extension direction) of the transmission cable 505, thereby improving the transmission stability of the transmission cable 505.

[0059] Specifically, in the embodiment, the driving wheel 503 is vertically arranged at the end of the screw rod 501 away from the knob 510, and the transmission wheel has three, which are the first transmission wheel 509, the second transmission wheel 502 and the third transmission wheel 504. The first transmission wheel 509 is arranged at the end of the screw rod 501 connected to the knob 510 and located between the knob 510 and the screw rod nut 511, and the first transmission wheel 509 is horizontally arranged. The transmission cable 505 passes through the first transmission wheel 509 to keep the transmission cable 505 and the screw rod nut 511 at the same horizontal height. The second transmission wheel 502 and the third transmission wheel 504 are arranged at the end of the screw rod 501 away from the knob 510, and the second transmission wheel 502 and the third transmission wheel 504 are symmetrically arranged on both sides of the screw rod 501. The transmission cable 505 passes through the second transmission wheel 502 and the third transmission wheel 504 and is sleeved on the driving wheel 503. The second transmission wheel 502 and the third transmission wheel 504 convert the horizontal displacement of the screw rod nut 511 into vertical traction. The first transmission wheel 509, the second transmission wheel 502 and the third transmission wheel 504 realize the reversing of the transmission cable 505, and the moving direction of the transmission cable 505 is gradually adjusted from horizontal to tangential to the driving wheel 503, thereby reducing the angle deviation.

[0060] In the embodiment, the scale assembly includes a scale plate 506 and a pointer 508, the scale plate 506 is arranged on one side of the lead screw 501, and the scale plate 506 is provided with scale marks 507 indicating the same direction as the extension direction of the lead screw 501. The pointer 508 is in transmission connection with the lead screw nut 511 and can move along the scale marks 507 in the direction of the scale marks 507.

[0061] Specifically, in the embodiment, the scale plate 506 is fixed to the base 1 in the axial direction of the lead screw 501, and the surface is engraved with linear scale marks 507 consistent with the extension direction of the lead screw 501, and the scale interval in the scale marks 507 is in proportional relationship with the lead of the lead screw 501. The pointer 508 is fixedly connected with the side wall of the lead screw nut 511, so that the pointer 508 can move synchronously with the axial displacement of the lead screw nut 511, and the tip of the pointer 508 points to the scale value of the scale plate 506, so that the operator can directly view the displacement amount of the pointer 508, thereby deducing the rotation angle of the puncture needle 3.

[0062] In the embodiment, the connecting rod adjusting mechanism 4 includes a drive shaft 408, the drive shaft 408 is in transmission connection with the clutch pipe 204, and the drive shaft 408 rotates to drive the needle part 404A to rotate with the needle point 404B as the center.

[0063] Specifically, in the embodiment, one end of the drive shaft 408 is provided with a groove 408A, one end of the clutch pipe 204 is provided with a protrusion 204A matched with the groove 408A, and the drive shaft 408 and the clutch pipe 204 are in transmission connection through the insertion of the protrusion 204A and the groove 408A, thereby realizing the rotation of the needle part 404A.

[0064] In the embodiment, the drive shaft 408 is provided with a through hole coaxial with the drive shaft 408. The clutch mechanism 2 further includes an adjusting part 202, the surface of the adjusting part 202 is provided with adjusting threads matched with the clutch wheel 203, the clutch wheel 203 rotates to drive the adjusting part 202 to move horizontally, and the adjusting part 202 is arranged in the through hole. The clutch pipe 204 is arranged at one end of the adjusting part 202 and can rotate in the axial direction of the adjusting part 202.

[0065] In the embodiment, the adjusting part 202 is arranged in the through hole on the drive shaft 408, and there is a gap between the outer wall of the adjusting part 202 and the hole wall of the through hole to ensure that the adjusting part 202 does not contact the through hole. The adjusting part 202 is in threaded connection with the clutch wheel 203, and when the clutch wheel 203 rotates, the adjusting part 202 can be driven to move horizontally to drive the clutch pipe 204 to move together.

[0066] Specifically, in the embodiment, one end of the clutch pipe 204 away from the drive shaft 408 is arranged opposite to the drive wheel 503. The clutch pipe 204 moves to the direction where the drive wheel 503 is located under the drive of the adjusting member 202, and achieves the transmission connection with the drive wheel 503 after abutting against the drive wheel 503. Similarly, the adjusting member 202 moves away from the drive wheel 503, so that the gap between the clutch pipe 204 and the drive wheel 503 is generated, thereby disconnecting the transmission connection with the drive wheel 503.

[0067] It should be noted that, in the embodiment, the end of the clutch pipe 204 towards the drive wheel 503 is made of ceramic material. The friction of the ceramic material is large, and the transmission between the clutch pipe 204 and the drive wheel 503 is achieved through the friction after the clutch pipe 204 abuts against the drive wheel 503.

[0068] In addition, in the embodiment, the horizontal moving distance of the clutch pipe 204 and the adjusting member 202 is less than the depth of the groove 408A and the length of the protrusion 204A, so as to avoid that the connection structure between the drive shaft 408 and the clutch pipe 204 is invalid due to the too large moving distance of the clutch pipe 204.

[0069] As an implementable manner, the clutch pipe 204 and the drive wheel 503 can also achieve the transmission connection through the spline, gear and the like.

[0070] In addition, after the needle insertion angle adjusting device is used, the transmission connection with the drive wheel 503 is disconnected, so as to reset the fine adjustment mechanism 5 for the next use.

[0071] In the embodiment, the clutch mechanism 2 further comprises a bearing. The bearing is arranged between the clutch pipe 204 and the adjusting member 202, so that the clutch pipe 204 can move with the adjusting member 202 and can rotate.

[0072] The adjusting member 202 is connected with the clutch pipe 204 through the bearing, so that the clutch pipe 204 can move axially with the adjusting member 202, and the clutch pipe 204 can also rotate to drive the drive shaft 408 under the transmission of the drive wheel 503.

[0073] In the embodiment, the adjusting member 202 is a worm, and the clutch wheel 203 is a turbine.

[0074] Specifically, the matching structure of the worm and the turbine has self-locking characteristics, and can be locked during the puncture process, thereby further avoiding the accidental angle deviation caused by the movement of the patient or the resistance of the tissue during the puncture process.

[0075] It should be noted that, in the embodiment, the side of the connecting rod adjusting mechanism 4 away from the fine adjustment mechanism 5 is provided with a mounting groove 201, and the turbine and the worm are arranged in the mounting groove 201. The top end of the turbine protrudes out of the slot of the mounting groove 201 for rotating operation.

[0076] In combination Figure 3 , Figure 4 In this embodiment, the connecting rod adjusting mechanism 4 comprises a first connecting rod 401, a second connecting rod 406, a third connecting rod 402, a fourth connecting rod 405, a fifth connecting rod 403, and a sixth connecting rod 404. The first connecting rod 401 is arranged on the mounting portion and fixedly connected with the mounting portion. The second connecting rod 406 is hingedly connected with the first connecting rod 401 and can rotate in the vertical direction. The third connecting rod 402 is hingedly connected with the first connecting rod 401 and arranged in parallel with the second connecting rod 406 along the length direction of the first connecting rod 401. The third connecting rod 402 is arranged in parallel with the second connecting rod 406, and one end of the third connecting rod 402 away from the second connecting rod 406 is provided with an extension part extending in a direction away from the second connecting rod 406. The fourth connecting rod 405 is hingedly connected with the second connecting rod 406 and the third connecting rod 402 respectively and arranged in parallel with the first connecting rod 401. The fifth connecting rod 403 is arranged between the first connecting rod 401 and the third connecting rod 402 and arranged in parallel with the first connecting rod 401. One end of the fifth connecting rod 403 is hingedly connected with the fourth connecting rod 405. The sixth connecting rod 404 is hingedly connected with the extension part and the other end of the fifth connecting rod 403 respectively. Among them, the second connecting rod 406 and the third connecting rod 402 are both two, and the two second connecting rods 406 and the two third connecting rods 402 are oppositely arranged on both sides of the first connecting rod 401 and the fourth connecting rod 405. The first connecting rod 401, the second connecting rod 406, the third connecting rod 402, and the fourth connecting rod 405 form a double-sided parallelogram mechanism. The needle penetrating portion 404A is arranged on the sixth connecting rod 404, and the needle exit point 404B is located at the end of the sixth connecting rod 404.

[0077] Specifically, in this embodiment, the first connecting rod 401, the fourth connecting rod 405, and the second connecting rod 406 and the third connecting rod 402 arranged on both sides form two groups of symmetrical parallelograms. Under this structure, the base 1 connecting rod is the lens reference of the connecting rod adjusting mechanism 4, and the fourth connecting rod 405 is in parallel relationship with the first connecting rod 401 at all times during movement. When the driving shaft 408 rotates, the second connecting rod 406 rotates with the driving shaft 408, and the two groups of parallelograms deform synchronously. During the deformation process, the fifth connecting rod 403 can form a constraint to make the sixth connecting rod 404 only rotate around the needle exit point 404B and not produce transverse displacement, thereby realizing the adjustment of the needle insertion angle of the puncture needle 3.

[0078] In this embodiment, one end of the sixth connecting rod 404 provided with the needle exit point 404B is a spherical surface structure.

[0079] Specifically, in this embodiment, the center of the spherical surface structure coincides with the virtual fixed point 407. During the rotation process of the sixth connecting rod 404, the position of the center of the spherical surface structure is constant, which can ensure that the position of the needle exit point 404B remains fixed. In addition, during the puncture process, the spherical surface is in contact with the body surface of the patient, and the body sensation is more comfortable.

[0080] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A needle insertion angle adjustment device, characterized in that, include: The base (1) has a mounting part; The linkage adjustment mechanism (4) has a needle-threading part (404A) through which a needle body is threaded. A virtual fixed point (407) is formed on one side of the linkage adjustment mechanism (4). One end of the needle-threading part (404A) is provided with a needle-exit point (404B) that coincides with the virtual fixed point (407). The needle-exit point (404B) is used to thread out the needle tip. The needle-threading part (404A) rotates with the linkage adjustment mechanism (4) in the same vertical plane and the position of the needle-exit point (404B) remains unchanged. The fine-tuning mechanism (5) includes a knob (510) and a scale assembly. The knob (510) is located on one side of the linkage adjustment mechanism (4), and the scale assembly is arranged opposite to the knob (510) to record the rotation angle of the knob (510). The clutch mechanism (2) includes a clutch tube (204) and a clutch wheel (203). The clutch tube (204) is located on one side of the fine-tuning mechanism (5). The clutch tube (204) is connected to the linkage adjustment mechanism (4) to drive the needle part (404A) to rotate. The clutch wheel (203) is connected to the clutch tube (204) so ​​that the clutch tube (204) is connected to or disconnected from the knob (510). The base (1), the linkage adjustment mechanism (4), the fine-tuning mechanism (5) and the clutch mechanism (2) are all made of non-metallic materials that do not affect the quality of CT imaging; The fine-tuning mechanism (5) also includes: A lead screw (501) is provided at the mounting part and is connected to the knob (510) in a transmission manner; A lead screw nut (511) is provided on the lead screw (501) and threadedly engaged with the lead screw (501); The drive wheel (503) is located on one side of the lead screw (501) and is connected to the connecting rod adjustment mechanism (4) for transmission. The transmission cable (505) is connected to the drive wheel (503) and the lead screw nut (511) respectively, so that the lead screw nut (511) can pull the transmission cable (505) and drive the drive wheel (503) to rotate, thereby driving the connecting rod adjustment mechanism (4) to rotate. When the clutch tube (204) is connected to the drive wheel (503), the clutch tube (204) rotates with the drive wheel (503), thereby driving the needle part (404A) of the linkage adjustment mechanism (4) to rotate to adjust the angle of the puncture needle; The scale component includes: A scale plate (506) is provided on one side of the lead screw (501), and the scale plate (506) has scale markings (507) with the same marking direction as the extension direction of the lead screw (501); The indicator needle (508) is connected to the lead screw nut (511) and is able to move along the marked direction of the scale mark (507).

2. The needle insertion angle adjustment device according to claim 1, characterized in that, The fine-tuning mechanism (5) also includes: At least one drive wheel, through which the drive cable (505) changes its direction of movement.

3. The needle insertion angle adjustment device according to claim 2, characterized in that, The linkage adjustment mechanism (4) includes: The drive shaft (408) is connected to the clutch tube (204) for transmission. The drive shaft (408) rotates to drive the needle insertion part (404A) to rotate around the needle exit point (404B) as the center.

4. The needle insertion angle adjustment device according to claim 3, characterized in that, The drive shaft (408) has a through hole coaxial with the drive shaft (408); The clutch mechanism (2) further includes: The adjusting member (202) has an adjusting thread on its surface that is adapted to the clutch wheel (203), so that the clutch wheel (203) rotates to drive the adjusting member (202) to move horizontally, and the adjusting member (202) passes through the through hole; The clutch tube (204) is located at one end of the adjusting member (202) and can rotate along the axial direction of the adjusting member (202).

5. The needle insertion angle adjustment device according to claim 4, characterized in that, The clutch mechanism (2) further includes: A bearing is provided between the clutch tube (204) and the adjusting member (202) so that the clutch tube (204) can move with the adjusting member (202) and can rotate.

6. The needle insertion angle adjustment device according to claim 4, characterized in that, The adjusting component (202) is a worm gear; The clutch wheel (203) is a worm gear.

7. The needle insertion angle adjustment device according to claim 3, characterized in that, The linkage adjustment mechanism (4) includes: The first connecting rod (401) is disposed on the mounting part and fixedly connected to the mounting part; The second link (406) is hinged to the first link (401) and can rotate in the vertical direction; The third link (402) is hinged to the first link (401) and spaced apart from the second link (406) along the length direction of the first link (401). The third link (402) and the second link (406) are arranged parallel to each other. The fourth link (405) is hinged to the second link (406) and the third link (402) respectively, and is arranged parallel to the first link (401). The end of the fourth link (405) away from the second link (406) is provided with an extension portion extending in a direction away from the second link (406). The fifth link (403) is located between the first link (401) and the fourth link (405) and is parallel to the first link (401). One end of the fifth link (403) is hinged to the third link (402). The sixth link (404) is hinged to the extension and the other end of the fifth link (403); There are two of each of the second link (406) and the third link (402). The two second links (406) and the two third links (402) are arranged opposite to each other on both sides of the first link (401) and the fourth link (405). The first link (401), the second link (406), the third link (402) and the fourth link (405) together form a double-sided parallelogram mechanism. The needle insertion part (404A) is located on the sixth link (404), and the needle exit point (404B) is located at the end of the sixth link (404).

8. The needle insertion angle adjustment device according to claim 7, characterized in that, The end of the sixth link (404) with the needle outlet (404B) has a spherical structure.

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