Disposable puncture needle fixer

Abstract

The utility model relates to the technical field of cell tissue sampling instruments, in particular to a disposable puncture needle fixator which comprises a locking clamp, a base, an adjusting mechanism and a positioning mechanism. The positioning mechanism comprises a base detachably connected to the adjusting mechanism and a cover plate rotationally connected to the side face of the base, a U-shaped groove is formed in the base, a mounting groove is formed in one side of the U-shaped groove, a pressure spring is fixed to the top of the mounting groove, a main sliding block is fixed to the other end of the pressure spring, and an auxiliary sliding block is slidably connected to the main sliding block; a ball head connecting rod is fixed to the end, away from the pressure spring, of the main sliding block, a pressing block is arranged at the ball head of the ball head connecting rod, a strip-shaped opening is formed in the side, away from the U-shaped groove, of the base and communicates with the mounting groove, the pressing block can slide in the strip-shaped opening, and the pressing block extends into the mounting groove from the strip-shaped opening; and a pressing strip is fixed on the cover plate. According to the device, the puncture needle can be prevented from loosening during use, the direction of the puncture needle can be accurately adjusted, and the accuracy of puncture operation is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cell tissue sampling instruments, in particular to a disposable puncture needle fixer. Background Art

[0002] A medical puncture needle is a medical device mainly used to obtain tissue samples or perform injection treatments. According to different uses and functions, puncture needles can be divided into many types, such as venous puncture needles, arterial puncture needles, hollow puncture needles, puncture biopsy needles, etc.

[0003] The function of a biopsy needle is to puncture body tissues or organs with a thin or thick needle to obtain tissue or cell samples for pathological or cytological examination. This examination method is often used to clarify the nature and type of diseases such as tumors, as well as to monitor disease progression and treatment effects.

[0004] The biopsy needle is usually used together with an ultrasound probe. Under ultrasound guidance, the biopsy needle can accurately locate the position of the target tissue, thereby improving the accuracy and safety of the biopsy. The biopsy needle holder can fix the biopsy needle on the ultrasound probe. When the ultrasound probe moves, the biopsy needle moves with it, which helps to improve the accuracy of the biopsy.

[0005] The prior art "Puncture Needle Holder" (publication number: CN101756715B) discloses a puncture needle holder, which controls the adjustment of the distance between the first needle seat and the second needle seat through a connecting rod mechanism to form guide spaces of different sizes, which can be used for puncture needles of different diameters. However, the prior art still has the following technical problems:

[0006] Because medical staff need to hold the handle of the puncture needle to operate when using it, and the prior art only uses a pressing block to compress the puncture needle, and the cross-section of the rod of the puncture needle is circular, it is very easy for the rod of the puncture needle to not be compressed and become loose, which increases the difficulty of medical staff in sampling tissues and makes it impossible for medical staff to accurately pierce the target position of human tissues, thereby affecting the accuracy of pathological diagnosis. Utility Model Content

[0007] The utility model provides a disposable puncture needle holder, which can solve the problem that the puncture needle holder in the prior art is easy to loosen when the puncture needle is pressed, resulting in inaccurate human tissue sampling position, thereby affecting the accuracy of pathological diagnosis.

[0008] The present application provides the following technical solution: a disposable puncture needle holder, comprising a locking clip, a base fixed on the locking clip, an adjustment mechanism fixed on the base, and a positioning mechanism detachably connected to the adjustment mechanism;

[0009] The positioning mechanism includes a base detachably connected to the adjusting mechanism and a cover plate rotatably connected to the side of the base, the base is provided with a U-shaped groove, one side of the U-shaped groove is provided with a mounting groove, the mounting groove is connected to the U-shaped groove, a compression spring is fixed to the top of the mounting groove, the other end of the compression spring is fixed to a main slider, the side of the main slider close to the U-shaped groove is slidably connected to the auxiliary slider, the end of the main slider away from the compression spring is fixed to a ball head connecting rod, the ball head part of the ball head connecting rod is provided with a clamping block, the side of the base away from the U-shaped groove is provided with a strip opening connected to the mounting groove, the strip opening is connected to the mounting groove, the clamping block can slide in the strip opening, and the clamping block extends from the strip opening into the mounting groove; a pressure strip is fixed to the cover plate, the length of the pressure strip is equal to the length of the U-shaped groove.

[0010] Beneficial effects:

[0011] 1. The U-shaped groove is used to install the puncture needle. When the cover plate is closed on the base, the pressure strip can be pressed into the U-shaped groove and press the top surface of the puncture needle rod to achieve pre-fixation of the puncture needle; in addition, pressing the pressing block into the installation groove can make the pressing block form a thrust on the ball head connecting rod, so that the main slider drives the auxiliary slider to slide in the direction of the U-shaped groove and press the side of the puncture needle rod. The puncture needle can be subjected to the dual pressure of the pressure strip and the auxiliary slider, which are perpendicular to each other, and will not rotate circumferentially during use, thereby effectively preventing the puncture needle from loosening during use;

[0012] 2. The force with which the auxiliary slider presses the puncture needle can be adjusted by the depth of the pressing block pressed into the installation groove, thereby improving the adjustability of the device and the convenience of pressing the puncture needle.

[0013] Furthermore, the side surface of the clamping block is an inclined surface, and the clamping block is provided with a first threaded hole.

[0014] Beneficial effect: When the pressing block is pressed into the installation groove, the inclined surface can form a thrust on the ball head of the ball head connecting rod, so that the main slider pushes the auxiliary slider to complete the squeezing action on the side of the puncture needle.

[0015] Furthermore, a square block is fixed to the side of the cover plate away from the base, and a second threaded hole is provided on the direction block.

[0016] Beneficial effect: When the cover is closed on the base and the clamping block is pressed into the mounting groove, a screw can be passed through the first threaded hole on the square block and screwed into the second threaded hole on the clamping block, so that the cover and the base remain fixed, and the pressure strip and the auxiliary slider maintain a clamped state on the puncture needle.

[0017] Furthermore, the adjustment mechanism includes a first positioning seat and a second positioning seat fixed on the base, a worm is rotatably connected between the first positioning seat and the second positioning seat, a fan-shaped worm wheel is meshed under the worm, the end of the fan-shaped worm wheel away from the worm is rotatably connected to the base, and the base is detachably connected to the fan-shaped worm wheel.

[0018] Beneficial effect: The adjustment mechanism drives the deflection angle of the fan-shaped worm wheel and the base through the rotation of the worm, thereby facilitating the adjustment of the angle of the puncture needle installed on the base. At the same time, the precise deflection angle of the fan-shaped worm wheel can be adjusted according to the number of rotations of the worm, which helps to improve the accuracy of puncture.

[0019] Furthermore, a rotation-stop screw is threadedly connected to the second positioning seat.

[0020] Beneficial effect: The stop screw is used to prevent the worm from rotating circumferentially relative to the first positioning seat and the second positioning seat, thereby avoiding deflection and vibration of the fan-shaped worm gear, the base and the puncture needle due to the rotation of the worm, and improving the operational stability of the puncture needle when piercing the tissue.

[0021] Furthermore, a knob is fixed to the end of the worm away from the first positioning seat.

[0022] Beneficial effect: The knob helps the user to turn the worm more conveniently, thereby facilitating the adjustment of the deflection angle of the fan-shaped worm wheel.

[0023] Furthermore, the locking clamp includes a lower clamp fixedly connected to the side of the base and an upper clamp rotatably connected to the lower clamp, the sides of the lower clamp and the upper clamp are provided with integrally formed ribs, the ribs are provided with third threaded holes, and the sides of the ribs of the lower clamp are fixed to the base.

[0024] Beneficial effect: The upper clamp and the lower clamp can clamp the column ultrasonic probe, and are fastened by inserting screws into the third threaded hole on the rib plate, so that the entire puncture needle holder can be fixed on the ultrasonic probe, making it easier for the puncture needle to move synchronously with the ultrasonic probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the front view of the utility model.

[0026] Figure 2 for Figure 1 Top view of the .

[0027] Figure 3 for Figure 1 Enlarged view of the positioning mechanism.

[0028] Figure 4 for Figure 3 Top view of the .

[0029] Figure 5 for Figure 3 A magnified view of the main slider and the sub-slider. DETAILED DESCRIPTION

[0030] The following is further described in detail through specific implementation methods:

[0031] The marks in the drawings of the specification include: upper clamp 1, lower clamp 101, rib plate 2, third threaded hole 201, first positioning seat 3, worm 4, puncture needle 5, anti-rotation screw 6, second positioning seat 7, knob 8, first threaded hole 9, fan-shaped worm gear 10, base 11, positioning mechanism 12, rotating shaft 13, square block 14, second threaded hole 141, cover plate 15, pressure strip 151, hinge 16, base 17, U-shaped groove 171, screw hole 172, compression spring 173, mounting groove 174, auxiliary slider 18, slide groove 181, main slider 19, ball head connecting rod 20, clamping block 21.

[0032] Embodiment 1

[0033] like Figures 1 to 5 As shown, the disposable puncture needle holder comprises a locking clamp, a base 11 fixed on the locking clamp, an adjusting mechanism fixed on the base 11, and a positioning mechanism 12 screwed to the adjusting mechanism.

[0034] Locking clamp Figure 2 As shown, the lower clip 101 and the upper clip 1 are connected at one end by a hinge, and the other ends of the lower clip 101 and the upper clip 1 are provided with an integrally formed rib plate 2, and the rib plate 2 is provided with a Figure 1 The third threaded hole 201 shown can be screwed into the third threaded hole 201 and used in conjunction with a nut to lock the upper clamp 1 and the lower clamp 101 , and the rib plate 2 of the lower clamp 101 is welded and fixed to the base 11 near the side of the base 11 .

[0035] Adjustment mechanism such as Figure 1 and Figure 2 As shown, it includes a first positioning seat 3 and a second positioning seat 7 welded on the base 11, a worm 4 is rotatably connected between the first positioning seat 3 and the second positioning seat 7, a bearing is installed on the first positioning seat 3, one end of the worm 4 is interference fit in the inner hole of the bearing, the other end of the worm 4 passes through the second positioning seat 7 and extends out of the edge of the base 11, and the end of the worm 4 extending out of the base 11 is interference fit with a knob 8, and a threaded hole is also vertically opened on the second positioning seat 7, a stop screw 6 is connected in the threaded hole, and the threaded end of the stop screw 6 can contact the outer cylindrical surface of the worm 4, a fan-shaped worm wheel 10 is meshed below the worm 4, and a rotating shaft 13 is pivotally connected to the end of the fan-shaped worm wheel 10 away from the worm 4, and the rotating shaft 13 is vertically welded to the base 11.

[0036] Positioning mechanism 12 Figures 3 to 5As shown, it includes a base 17 connected to the fan-shaped worm gear 10 by screws and a cover plate 15 connected to the side of the base 17 by a hinge 16. The base 17 is provided with a screw hole 172, and the base 17 can be fixed to the fan-shaped worm gear 10 by screws. A vertical U-shaped groove 171 is provided in the middle of the base 17, and a mounting groove 174 is provided on one side of the U-shaped groove 171. The mounting groove 174 is connected to the U-shaped groove 171. A compression spring 173 is welded in the mounting groove 174, and a main slider 19 is welded to the other end of the compression spring 173. The main slider 19 is slidably connected to the side of the U-shaped groove 171 with a secondary slider 18, as shown in FIG. Figure 5 As shown, the main slider 19 and the auxiliary slider 18 are both wedge-shaped, and a slide groove 181 is provided on the auxiliary slider 18. The end of the slide groove 181 close to the compression spring 173 is inclined in the direction of the compression spring 173. The main slider 19 is provided with a slide bar that cooperates with the slide groove 181. The slide bar and the main slider 19 are integrally formed, so that the main slider 19 and the auxiliary slider 18 can slide along the slide groove 181 relative to each other; the end of the main slider 19 away from the compression spring 173 is welded with a Figure 3 The ball head connecting rod 20 is shown; a clamping block 21 is provided at the ball head portion of the ball head connecting rod 20, and a strip opening connected to the mounting groove 174 is provided on the side of the base 17 away from the U-shaped groove 171, and the strip opening is connected to the mounting groove 174. The clamping block 21 extends from the outside of the strip opening into the mounting groove 174 and can slide horizontally in the strip opening; inclined surfaces are provided on both sides of the clamping block 21, and a first threaded hole 9 is provided in the middle of the clamping block 21.

[0037] An integrally formed pressure strip 151 is vertically provided on the cover plate 15, and the length of the pressure strip 151 is equal to the length of the U-shaped groove 171. A square block 14 is welded to the side of the cover plate 15 away from the base 17, and a second threaded hole 141 is provided on the direction block. The cover plate 15 can be covered on the base 17, and after covering, the pressure strip 151 is just inserted into the U-shaped groove 171, and the cover plate 15 and the base 17 can be locked and fixed by screwing the screws into the second threaded hole 141 and the first threaded hole 9 in turn.

[0038] The method of using this device is as follows:

[0039] First, the upper clamp 1 and the lower clamp 101 are inserted into the ultrasonic probe, and screws are inserted into the third threaded holes 201 on the ribs 2 of the upper clamp 1 and the lower clamp 101 to lock them, and the entire device is fixed on the ultrasonic probe; then, the rod of the puncture needle 5 is inserted into the U-shaped groove 171, and the cover plate 15 is covered so that the pressure strip 151 on the cover plate 15 presses the rod of the puncture needle 5 in the U-shaped groove 171, and then the pressing block 21 is pushed toward the mounting groove 174, so that the auxiliary slider 1 8 presses the rod of the puncture needle 5 in the direction of the U-shaped groove 171. At this time, the first threaded hole 9 just coincides with the second threaded hole 141. After the screws are inserted into the first threaded hole 9 and the second threaded hole 141 in sequence, the cover 15 and the base 17 can be locked, and the puncture needle 5 is also fixed at the same time. If the direction of the puncture needle 5 needs to be adjusted, the knob 8 can be rotated, and the puncture needle 5 can be adjusted to a suitable direction with the cooperation of the worm 4 and the fan-shaped worm gear 10. After tightening the stop screw 6, the subsequent puncture operation can be started.

[0040] All structural parts in this solution are made of plastic material, which has the advantages of: plastic material is light and durable, making the puncture needle holder more convenient to use; and plastic is an insulating material, which helps prevent electrical accidents during use; in addition, existing holders are mostly made of metal materials, and the clamping part of the needle tube needs to be completely disinfected after use before the next use, but the clamping part itself has a complex structure and there are dead corners for cleaning. Bacteria and viruses remaining on the surface of the structure cannot be completely cleaned, and reuse can easily cause surgical infection and disease transmission. The holder of this solution is made of plastic material, which has a lower manufacturing cost and can be directly scrapped after use without reuse, thereby effectively avoiding the risk of surgical infection caused by incomplete disinfection of the holder.

[0041] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A disposable puncture needle holder, comprising a locking clip, a base fixed on the locking clip, an adjustment mechanism fixed on the base, and a positioning mechanism detachably connected to the adjustment mechanism, characterized in that: The positioning mechanism includes a base detachably connected to the adjusting mechanism and a cover plate rotatably connected to the side of the base, the base is provided with a U-shaped groove, one side of the U-shaped groove is provided with a mounting groove, the mounting groove is connected to the U-shaped groove, a compression spring is fixed to the top of the mounting groove, the other end of the compression spring is fixed to a main slider, the side of the main slider close to the U-shaped groove is slidably connected to the auxiliary slider, the end of the main slider away from the compression spring is fixed to a ball head connecting rod, the ball head part of the ball head connecting rod is provided with a clamping block, the side of the base away from the U-shaped groove is provided with a strip opening connected to the mounting groove, the strip opening is connected to the mounting groove, the clamping block can slide in the strip opening, and the clamping block extends from the strip opening into the mounting groove; a pressure strip is fixed to the cover plate, the length of the pressure strip is equal to the length of the U-shaped groove.

2. The disposable puncture needle holder according to claim 1, characterized in that: The side surface of the pressing block is an inclined surface, and a first threaded hole is provided on the pressing block.

3. The disposable puncture needle holder according to claim 2, characterized in that: A square block is fixed on the side of the cover plate away from the base, and a second threaded hole is provided on the square block.

4. The disposable puncture needle holder according to claim 3, characterized in that: The adjustment mechanism includes a first positioning seat and a second positioning seat fixed on the base, a worm is rotatably connected between the first positioning seat and the second positioning seat, a fan-shaped worm wheel is meshed below the worm, the end of the fan-shaped worm wheel away from the worm is rotatably connected to the base, and the base is detachably connected to the fan-shaped worm wheel.

5. The disposable puncture needle holder according to claim 4, characterized in that: The second positioning seat is threadedly connected with a rotation-stopping screw.

6. The disposable puncture needle holder according to claim 5, characterized in that: A knob is fixed on the end of the worm away from the first positioning seat.

7. The disposable puncture needle holder according to claim 6, characterized in that: The locking clamp includes a lower clamp fixedly connected to the side of the base and an upper clamp rotatably connected to the lower clamp. The sides of the lower clamp and the upper clamp are provided with integrally formed ribs, and the ribs are provided with third threaded holes. The side of the rib of the lower clamp is fixed to the base.

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