CN215914832U - Puncture needle - Google Patents

Abstract

The utility model discloses a puncture needle, relating to the technical field of medical instruments, comprising: a handle comprising a first handle and a second handle; the first handle and the second handle are arranged on the core rod in a sliding manner, and the first handle is connected with the needle core in the core rod; the locking and positioning mechanism comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve is connected with one end of the corresponding first handle or the corresponding second handle, the second sleeve and the third sleeve are sequentially arranged in the first sleeve, the second sleeve is connected with the core rod in a sliding mode, the second sleeve is connected with the first sleeve in a threaded mode, the third sleeve is sleeved on the core rod, and the third sleeve is movably connected with one end of the second sleeve. The positioning locking mode of the puncture needle in the application is simple to operate, the length of the puncture needle can be adjusted randomly, the stability of positioning locking is guaranteed, and the appearance effect is good.

Description

Puncture needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a puncture needle.

Background

The puncture needle is a medical instrument for sampling and injecting tissues of various organs such as kidney, liver, lung, mammary gland, thyroid gland, prostate, pancreas, testis, uterus, ovary, body surface and the like in minimally invasive surgery. At present, most of the existing connection modes between an endoscope puncture needle and an endoscope and an aspirator are in threaded connection, and particularly when medical personnel adopt the aspirator to extract tissues, the puncture needle is easily driven by the action of the hand of the medical personnel, so that the connection stability between the puncture needle and the aspirator is influenced; and the connection mode is rigid connection, namely the aspirator is directly fixed at the end part of the puncture needle, and the connection is inconvenient for medical personnel to operate the aspirator. Meanwhile, the positioning and locking modes of the puncture needle in the current market are mainly clamping groove clamping and locking screws, wherein the clamping groove clamping locking mode can only adjust the needle length adjusted each time through a fixed grid number (for example, 0.25cm is a grid and is adjusted by multiples of 0.25 cm), the needle length cannot be adjusted at will, and meanwhile, the mode is easy to cause unstable locking due to misalignment of the clamping groove and easily causes the risk of sliding; the locking mode of the locking screw can adjust the length of the needle at will, but the operation is troublesome and the appearance is poor.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Aiming at the technical problems of complex operation and unstable positioning and locking of the conventional positioning and locking mode of the puncture needle, the utility model provides the puncture needle which can ensure the stability of positioning and locking while realizing the random adjustment of the needle length and is simple to operate.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the utility model is as follows:

a puncture needle, comprising:

a handle comprising a first handle and a second handle;

the first handle and the second handle are arranged on the core rod in a sliding manner, and the first handle is connected with a needle core in the core rod;

the locking and positioning mechanism is arranged at the adjacent end parts of the first handle and the second handle and comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve is connected with the corresponding first handle or one end of the corresponding second handle, the second sleeve and the third sleeve are sequentially arranged in the first sleeve, the second sleeve is in sliding connection with the core rod, the second sleeve is in threaded connection with the first sleeve, the third sleeve is sleeved on the core rod, and the third sleeve is movably connected with one end of the second sleeve.

In the application, when the length of the needle extending out of the puncture needle needs to be adjusted, a medical worker only needs to rotate the first sleeve anticlockwise, the first sleeve is in threaded connection with the second sleeve, the second sleeve is in sliding connection with the core rod, so that the second sleeve moves linearly in the direction away from the third sleeve under the rotation of the first sleeve, the end part of the second sleeve is separated from the third sleeve, and the first handle is in sliding connection with the core rod and is connected with the needle core in the core rod, so that the relative position of the first handle on the core rod is adjusted by sliding the first handle, and the extending length of the needle core in the core rod is adjusted; when the length of the required needle core extending out is adjusted, medical staff only need to rotate the first sleeve clockwise, so that the second sleeve does linear motion in the direction close to the third sleeve under the rotation of the first sleeve, the end part of the second sleeve is connected with the third sleeve, and at the moment, the third sleeve tightly clamps the core rod, thereby realizing locking and positioning. Therefore, compared with the positioning and locking mode that the conventional puncture needle adopts a clamping groove to clamp or a locking screw, the positioning and locking mode of the puncture needle in the application is simple in operation, can realize the random adjustment of the needle length, ensures the stability of positioning and locking and has a good appearance effect.

Optionally, an internal thread is arranged on the inner wall of the first sleeve, an external thread is arranged on the outer wall of the second sleeve, and the internal thread is matched with the external thread.

Optionally, the inner wall of the first sleeve is provided with a first protrusion, the outer wall of the third sleeve is provided with an annular groove, and the first protrusion is matched with the annular groove.

Optionally, an annular partition plate is arranged between adjacent locking and positioning mechanisms.

Optionally, a first cavity and a second cavity which are communicated with each other in sequence are arranged in the third sleeve, the inner diameter of the first cavity is larger than that of the second cavity, and the first cavity is used for embedding the second sleeve.

Optionally, the core rod is provided with scale marks.

Optionally, a strip-shaped groove is arranged along the length direction of the core rod.

Optionally, the outer surface of the first sleeve is circumferentially provided with an anti-slip structure.

Optionally, the handle further comprises a sheath tube, and the sheath tube is connected with the second handle.

Optionally, the puncture needle further comprises a hose, and the hose is used for connecting the puncture needle with the aspirator.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) the puncture needle provided by the embodiment of the application has a simple structure, when the length of the needle extending out of the puncture needle needs to be adjusted, medical staff only need to rotate the first sleeve anticlockwise, the first sleeve is in threaded connection with the second sleeve, and the second sleeve is in sliding connection with the core rod, so that the second sleeve does linear motion in the direction far away from the third sleeve under the rotation of the first sleeve, the end part of the second sleeve is separated from the third sleeve, and the first handle is in sliding connection with the core rod and is connected with the needle core in the core rod, so that the relative position of the first handle on the core rod is adjusted by sliding the first handle, and the extending length of the needle core in the core rod is adjusted; when the length of the required needle core extending out is adjusted, medical staff only need to rotate the first sleeve clockwise, so that the second sleeve does linear motion in the direction close to the third sleeve under the rotation of the first sleeve, the end part of the second sleeve is connected with the third sleeve, and at the moment, the third sleeve tightly clamps the core rod, thereby realizing locking and positioning. Therefore, compared with the positioning and locking mode that the conventional puncture needle adopts a clamping groove for clamping or a locking screw, the positioning and locking mode of the puncture needle in the embodiment is simple to operate, can realize the random adjustment of the needle length, ensures the stability of positioning and locking, and has a good appearance effect.

(2) According to the puncture needle provided by the embodiment of the application, the first sleeve and the third sleeve are connected through the matching of the first protrusion and the annular groove. Meanwhile, the arrangement can effectively prevent the third sleeve from sliding relatively due to the rotation of the first sleeve.

(3) According to the puncture needle provided by the embodiment of the application, the annular partition plate is arranged between the adjacent locking and positioning mechanisms, so that when one locking and positioning mechanism is operated, the influence on the adjacent locking and positioning mechanisms is avoided.

(4) According to the puncture needle provided by the embodiment of the application, the outer diameter of the second sleeve is smaller than the inner diameter of the first cavity, the outer diameter of the second sleeve is larger than or equal to the inner diameter of the second cavity, the inner diameter of the first cavity is larger than the inner diameter of the second cavity, an annular boss is formed on the inner wall of the third sleeve, after the end of the second sleeve is embedded into the first cavity, the end of the second sleeve abuts against the surface of the annular boss, the generated force abuts against, the clamping force between the second cavity and the core rod is increased, and then the third sleeve tightly locks the core rod under the action of the second sleeve, so that the core rod cannot move.

(5) According to the puncture needle provided by the embodiment of the application, the anti-skidding structure is arranged on the circumferential direction of the outer surface of the first sleeve, the friction force of the outer surface of the first sleeve can be increased through the arrangement, and an operator can rotate the first sleeve conveniently.

(6) According to the puncture needle provided by the embodiment of the application, the hose is arranged and used for connecting the puncture needle with the aspirator; compare and connect in the mode that adopts threaded connection between current scope pjncture needle and the aspirator, this embodiment is through setting up the hose for realize being connected between pjncture needle and the aspirator, not only increased the distance between pjncture needle and the aspirator, make things convenient for medical personnel to operate, and increased the stability of whole operation process simultaneously, effectively avoided because threaded connection makes the action of medical personnel's hand, and drives the condition of pjncture needle.

Drawings

FIG. 1 is a schematic view showing the structure of a puncture needle with an aspirator incorporated therein according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a lancet with an aspirator assembled therein according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a puncture needle according to an embodiment of the present invention.

Fig. 4 is a partial exploded view of a needle in accordance with an embodiment of the present invention.

Figure 5 is a partial exploded view of a needle in accordance with an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a first sleeve according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a second sleeve according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a third sleeve according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.

Example 1

With reference to fig. 1-8, the present embodiment provides a lancet comprising: a handle comprising a first handle 1 and a second handle 2; the first handle 1 and the second handle 2 are both arranged on the core bar 3 in a sliding manner, and the first handle 1 is connected with a needle core in the core bar 3; the locking and positioning mechanism 4 is arranged at the end part of the first handle 1 adjacent to the end part of the second handle 2, the locking and positioning mechanism 4 comprises a first sleeve 41, a second sleeve 42 and a third sleeve 43, the first sleeve 41 is connected with the corresponding first handle 1 or one end of the corresponding second handle 2, the second sleeve 42 and the third sleeve 43 are sequentially arranged in the first sleeve 41, the second sleeve 42 is in sliding connection with the core rod 3, the second sleeve 42 is in threaded connection with the first sleeve 41, the third sleeve 43 is sleeved on the core rod 3, and the third sleeve 43 is movably connected with one end of the second sleeve 42.

In this embodiment, when the length of the needle extending from the puncture needle needs to be adjusted, the medical staff only needs to rotate the first sleeve 41 counterclockwise, because the first sleeve 41 is in threaded connection with the second sleeve 42, the second sleeve 42 is in sliding connection with the core rod 3, the second sleeve 42 makes a linear motion in a direction away from the third sleeve 43 under the rotation of the first sleeve 41, so that the end of the second sleeve 42 is separated from the third sleeve 43, because the first handle 1 is in sliding connection with the core rod 3, the first handle 1 is connected with the needle core in the core rod 3, and therefore the relative position of the first handle 1 on the core rod 3 is adjusted by sliding, and the extending length of the needle core in the core rod 3 is adjusted; when the required length of the extended stylet is adjusted, the medical staff only needs to rotate the first sleeve 41 clockwise to enable the second sleeve 42 to do linear motion in the direction close to the third sleeve 43 under the rotation of the first sleeve 41, so that the end part of the second sleeve 42 is connected with the third sleeve 43, and at the moment, the third sleeve 43 tightly clamps the core rod 3, thereby realizing locking and positioning. Therefore, compared with the positioning and locking mode that the conventional puncture needle adopts a clamping groove for clamping or a locking screw, the positioning and locking mode of the puncture needle in the embodiment is simple to operate, can realize the random adjustment of the needle length, ensures the stability of positioning and locking, and has a good appearance effect.

Example 2

Compared with the technical scheme of the embodiment 1, the puncture needle of the embodiment can be improved as follows: the inner wall of the first sleeve 41 is provided with an internal thread, the outer wall of the second sleeve 42 is provided with an external thread, and the internal thread is matched with the external thread. The internal thread is matched with the external thread, so that the first sleeve 41 and the second sleeve 42 are connected with each other in a manner of convenient disassembly and assembly.

Example 3

With reference to fig. 5 to 8, the puncture needle of the present embodiment can be improved as follows compared with the technical solutions of embodiment 1 or 2: the inner wall of the first sleeve 41 is provided with a first protrusion 5, the outer wall of the third sleeve 43 is provided with an annular groove 6, and the first protrusion 5 is matched with the annular groove 6. The cooperation of the first projection 5 with said annular groove 6 provides a connection between the first sleeve 41 and said third sleeve 43. At the same time, this arrangement can effectively prevent the third sleeve 43 from sliding relatively due to the rotation of the first sleeve 41.

Example 4

With reference to fig. 1-2, compared with the technical solution of embodiment 1, the puncture needle of this embodiment can be improved as follows: an annular partition plate 7 is arranged between every two adjacent locking and positioning mechanisms 4. This arrangement allows one of the locking detents 4 to be operated while avoiding interference with an adjacent locking detent 4.

In practice, a gasket (not shown) is disposed between the first handle 1 and the first sleeve 41, and this arrangement increases the sealing performance and the connection stability between the first handle 1 and the first sleeve 41.

Example 5

With reference to fig. 8, compared with the technical solution of embodiment 1, the puncture needle of this embodiment can be improved as follows: the third sleeve 43 has a first cavity 9 and a second cavity 10 communicating with each other in sequence, the inner diameter of the first cavity 9 is larger than that of the second cavity 10, and the first cavity 9 is used for the insertion of the second sleeve 42.

In practical application, the outer diameter of the second sleeve 42 is smaller than the inner diameter of the first cavity 9, the outer diameter of the second sleeve 42 is larger than or equal to the inner diameter of the second cavity 10, the inner diameter of the first cavity 9 is larger than the inner diameter of the second cavity 10, so that an annular boss is formed on the inner wall of the third sleeve 43, after the end of the second sleeve 42 is embedded into the first cavity 9, the end of the second sleeve 42 abuts against the surface of the annular boss, the force generated by the abutment increases the clamping force between the second cavity 10 and the core rod 3, and further the third sleeve 43 tightly locks the core rod 3 under the action of the second sleeve 42, so that the core rod 3 cannot move.

Example 6

Compared with the technical scheme of the embodiment 1, the puncture needle of the embodiment can be improved as follows: the core rod 3 is provided with scale marks. The operator can observe and adjust the extending length of the needle core of the puncture needle conveniently.

Example 7

With reference to fig. 5, compared with the technical solution of embodiment 1, the puncture needle of this embodiment can be improved as follows: a strip-shaped groove 11 is arranged along the length direction of the core bar 3. In practical application, the inner wall of the second sleeve 42 is provided with a second protrusion, and the second protrusion is matched with the strip-shaped groove 11, so that the second sleeve 42 can perform sliding linear motion on the core rod 3 and simultaneously has a certain guiding function.

Example 8

Compared with the technical scheme of the embodiment 1, the puncture needle of the embodiment can be improved as follows: the outer surface of the first sleeve 41 is circumferentially provided with an anti-slip structure. In practice, as shown in fig. 4 and 6, the anti-slip structure is an arc-shaped groove 13, which can increase the friction force on the outer surface of the first sleeve 41, so as to facilitate the operator to rotate the first sleeve 41.

Example 9

With reference to fig. 1-4, compared with the technical solution of embodiment 1, the puncture needle of this embodiment can be improved as follows: and the sheath 14 is further included, and the sheath 14 is connected with the second handle 2. In practical application, a needle tube 15 is arranged in the sheath tube 14, and a needle core is arranged in the needle tube 15. This arrangement can be used to protect the stylet while further providing a guide.

Example 10

With reference to fig. 1-4, compared with the technical solution of embodiment 1, the puncture needle of this embodiment can be improved as follows: a hose 17 is also included, said hose 17 being used for connection between the puncture needle and the aspirator 18. In practice, one end of the hose 17 is connected to the first handle 1 by a luer fitting, and the other end of the hose 17 is connected to the aspirator 18 by a two-way cock 19. Compare and to adopt threaded connection's mode to connect between current scope pjncture needle and aspirator 18, this embodiment is through setting up hose 17 for realize being connected between pjncture needle and the aspirator 18, not only increased the distance between pjncture needle and the aspirator 18, make things convenient for medical personnel to operate, and increased the stability of whole operation process simultaneously, effectively avoided because threaded connection makes the action of medical personnel's hand, and drives the condition of pjncture needle.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims (10)

1. A puncture needle, comprising:

a handle comprising a first handle and a second handle;

the first handle and the second handle are arranged on the core rod in a sliding manner, and the first handle is connected with a needle core in the core rod;

the locking and positioning mechanism is arranged at the adjacent end parts of the first handle and the second handle and comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve is connected with the corresponding first handle or one end of the corresponding second handle, the second sleeve and the third sleeve are sequentially arranged in the first sleeve, the second sleeve is in sliding connection with the core rod, the second sleeve is in threaded connection with the first sleeve, the third sleeve is sleeved on the core rod, and the third sleeve is movably connected with one end of the second sleeve.

2. The needle of claim 1 wherein the first sleeve has internal threads on an inner wall thereof and the second sleeve has external threads on an outer wall thereof, the internal threads mating with the external threads.

3. A puncture needle according to claim 1 or 2, wherein the inner wall of the first sleeve is provided with a first projection, the outer wall of the third sleeve is provided with an annular groove, and the first projection is fitted into the annular groove.

4. The needle of claim 1 wherein an annular spacer is disposed between adjacent ones of said locking detents.

5. The puncture needle according to claim 1, wherein a first cavity and a second cavity are formed in the third sleeve in communication with each other, the first cavity having an inner diameter larger than that of the second cavity, and the first cavity is used for insertion of the second sleeve.

6. The needle of claim 1 wherein the core is provided with graduations.

7. The needle of claim 1 wherein a groove is provided along the length of the core.

8. The needle of claim 1 wherein the outer surface of the first sleeve is circumferentially provided with a non-slip feature.

9. The puncture needle of claim 1, further comprising a sheath, the sheath being coupled to the second handle.

10. The puncture needle of claim 1, further comprising a flexible tube for connection between the puncture needle and an aspirator.

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