Automatic needle locking structure for biopsy needle

Abstract

The utility model discloses an automatic needle locking structure for a biopsy needle. The automatic needle locking structure comprises an inner side shell, wherein the inner side shell is arranged on the side wall of one end, far away from a patient, of a shell of the biopsy needle outside through an outer side shell; and a safety locking device which is connected with a percussion module of an external biopsy needle and is used for locking and controlling the percussion state of the biopsy needle so as to avoid injury to a patient caused by mistaken percussion of the biopsy needle is arranged on the inner side shell. The biopsy needle locking device has the advantages that the biopsy needle can be effectively locked and controlled to prevent a patient from being hurt by mistaken triggering, and the pathological tissue collection efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an automatic needle locking structure for biopsy needles. Background Technology

[0002] A biopsy needle is a medical device used to collect pathological tissues from various organs in the human body. With the development of medical technology, biopsy needles are widely used to extract tissue or cell samples for pathological examination, thereby assisting doctors in diagnosing diseases. Currently, biopsy needles are classified into fully automatic biopsy needles and semi-automatic biopsy needles according to their operation control method. Fully automatic biopsy needles operate in a fully automatic firing mode, while semi-automatic biopsy needles operate in a semi-automatic firing mode.

[0003] However, existing biopsy needles, whether fully automatic or semi-automatic, are designed with a single firing mode and lack an automatic locking mechanism. This makes them prone to accidental firing during the collection of pathological tissues, which can cause harm to the patient and reduce the efficiency of collecting pathological tissues, thus failing to meet the needs of practical applications.

[0004] How to solve the above problems has become an urgent technical challenge. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an automatic needle locking structure for biopsy needles that can effectively lock and control the biopsy needle to avoid accidental firing and causing harm to the patient, and can improve the efficiency of pathological tissue collection.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An automatic locking structure for a biopsy needle includes an inner shell disposed on the side wall of the biopsy needle housing away from the patient via an outer shell; a safety locking device is provided on the inner shell, which is connected to the firing module of the external biopsy needle to lock the firing state of the biopsy needle to prevent accidental firing and injury to the patient.

[0008] Preferably, the inner shell includes an inner shell body that is bolted to the outer shell and mounted on the side wall of the shell away from the patient. A sliding cavity is provided on one side of the inner shell body. A first through hole and a second through hole are provided sequentially from top to bottom at the outer end of the sliding cavity. The external firing module is movably connected to the first through hole and its position is limited by the safety locking device.

[0009] Preferably, the inner side shell further comprises an ejector pin arranged on the inner side wall of the inner shell body near one side of the sliding cavity, a fifth elastic member is sleeved on the ejector pin, one end of the fifth elastic member is connected with the inner side wall of the inner shell body, and the other end of the fifth elastic member is connected with a corresponding cavity of an upper chord module of an external biopsy needle.

[0010] Preferably, the safety locking device comprises a safety lock push block and a safety lock switch arranged on the sliding cavity in sequence from bottom to top, one end of the safety lock push block is connected with a corresponding cavity of the inner side wall of the outer side shell, and one end of the safety lock switch is connected with the top of the sliding cavity.

[0011] Preferably, the safety lock push block comprises a limiting platform arranged at the lower end of the sliding cavity, a push rod which is arranged on the inner side wall of the limiting platform and is used for movably connecting with a corresponding part of the upper chord module and passes through the second through hole, and a sixth elastic member is arranged on the outer side wall of the limiting platform and passes through a side blind hole.

[0012] Preferably, the safety lock switch comprises a stopper arranged on the sliding cavity and located above the limiting platform, a convex groove is arranged on one side and an upper end of the stopper, a concave groove channel is arranged below one side of the convex groove on the stopper, and an upper blind hole is arranged on the top of the stopper and is connected with a seventh elastic member of the top of the sliding cavity.

[0013] Preferably, the fifth elastic member, the sixth elastic member and the seventh elastic member are all made of springs.

[0014] Compared with the prior art, the utility model has the beneficial effects as follows:

[0015] In the utility model, under the cooperation of the outer side shell and the shell on the inner side shell, the safety locking device and the inner side shell can limit the position of the firing module of the external biopsy needle, and then the locking control of the firing module of the external biopsy needle can be realized, so that the harm to the patient caused by the misoperation of the firing module can be avoided, and the smoothness of pathological tissue collection can be ensured to improve the collection efficiency. Therefore, the utility model has the advantages of being capable of effectively locking and controlling the biopsy needle to avoid the harm to the patient caused by the misoperation and improving the pathological tissue collection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described below in combination with the drawings and examples.

[0017] Fig. 1 is an explosion view of the automatic needle locking structure for the biopsy needle and the shell connection of the utility model;

[0018] Fig. 2 is a structure diagram of an automatic needle locking structure for a biopsy needle;

[0019] Fig. 3 is a connection diagram of a safety locking device and an inner shell of an automatic needle locking structure for a biopsy needle;

[0020] Fig. 4 is a connection diagram of an automatic needle locking structure, a firing module and an upper string module for a biopsy needle.

[0021] The reference signs are as follows: 1, outer shell, 10, shell, 2, inner shell, 21, inner shell body, 22, sliding cavity, 23, first through hole, 24, second through hole, 26, center pin, 27, fifth elastic element, 20, firing module, 30, upper string module, 3, safety locking device, 31, safety lock push block, 311, limiting platform, 312, push rod, 313, side blind hole, 314, sixth elastic element, 32, safety lock switch, 321, stop block, 322, upper blind hole, 323, groove channel, 324, convex groove, 325, seventh elastic element. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0023] Referring to Figs. 1 to 4 As shown in the figure, an automatic needle locking structure for a biopsy needle comprises an inner shell 2 on the side wall of the shell 10 of the biopsy needle away from the patient at the outer shell 1. A safety locking device 3 is arranged on the inner shell 2 and connected with the firing module 20 of the biopsy needle outside to lock and control the firing state of the biopsy needle to avoid injury to the patient caused by accidental firing. In the process of use, under the limitation of the inner shell 2 by the cooperation of the outer shell 1 and the shell 10, the safety locking device 3 and the inner shell 2 can be used to limit the position of the firing module 20 of the biopsy needle outside, and then the locking and control of the firing module 20 of the biopsy needle outside can be realized to avoid injury to the patient caused by accidental firing of the firing module due to misoperation, thereby ensuring the smoothness of pathological tissue collection to improve the collection efficiency.

[0024] In this embodiment, the inner shell 2 includes an inner shell body 21 that is bolted to the outer shell 10 on the side wall away from the patient. A sliding cavity 22 is formed on one side of the inner shell body 21. A first through hole 23 and a second through hole 24 are provided sequentially from top to bottom at the outer end of the sliding cavity 22. The external firing module 20 is movably connected to the first through hole 23 and its position is limited by the safety locking device 3. The inner shell 2 also includes a pin 26 disposed on the inner wall of the inner shell body 21 near the sliding cavity 22. A fifth elastic element 27 is sleeved on the pin 26, with one end of the fifth elastic element 27 connected to the inner wall of the inner shell body 21 and the other end of the fifth elastic element 27 connected to the corresponding cavity of the upper winding module 30 of the external biopsy needle.

[0025] In this embodiment, the safety locking device 3 includes a safety lock push block 31 and a safety lock switch 32 arranged sequentially from bottom to top on the sliding cavity 22, wherein one end of the safety lock push block 31 is connected to the corresponding cavity of the inner sidewall of the outer shell 1, and one end of the safety lock switch 32 is connected to the top of the sliding cavity 22.

[0026] In this embodiment, the safety lock push block 31 includes a limiting platform 311 located at the lower end of the sliding cavity 22. A push rod 312, which movably passes through the second through hole 24, is provided on the inner wall of the limiting platform 311 and is used to movably connect with a corresponding component of the upper winding module 30. A side blind hole 313 is also provided on the outer wall of the limiting platform 311, and a sixth elastic element 314 connected to a corresponding cavity on the inner wall of the outer shell 1 is provided on the side blind hole 313. The safety lock switch 32 includes a stop block 321 located on the sliding cavity 22 and above the limiting platform 311. A protrusion 324 is provided on the upper end of one side of the stop block 321, and a groove channel 323 is provided on the stop block 321 below the side of the protrusion 324. An upper blind hole 322 is also provided on the top of the stop block 321, and a seventh elastic element 325 connected to the top of the sliding cavity 22 is provided on the upper blind hole 322.

[0027] In this embodiment, the fifth elastic element 27, the sixth elastic element 314, and the seventh elastic element 325 are all made of springs.

[0028] In specific use, the safety self-locking working principle of this embodiment is as follows:

[0029] Before the external biopsy needle is wound, under the constraint of the inner shell body 21 of the inner shell 2 by the cooperation of the outer shell 1 and the shell 10, the limiting platform 311 of the safety lock push block 31 of the safety locking device 3 is connected to the surface of the sliding cavity 22 on one side near the patient. At this time, the limiting platform 311 and the stop block 321 of the safety lock switch 32 are engaged to limit the position of the safety lock switch 32. That is, the safety lock push block 31 and the safety lock switch 32 are both in their respective first predetermined positions. The firing rod of the firing module 20 passes through the first through hole 23 and slides away from the patient through the groove channel 323. At the same time, the firing button of the external biopsy needle is in an operable state. The firing module 20 and the winding module 30 are both in their respective first predetermined positions.

[0030] During the external biopsy needle winding operation, as the winding module 30 slides from its first predetermined position away from the patient to its second predetermined position, it engages with the push rod 312 to push the limiting platform 311, along with the side blind hole 313, away from the patient. When the winding module 30 and the limiting platform 311 reach their respective second predetermined positions, the limiting platform 311 releases its limiting effect on the stop 321. Furthermore, the sixth elastic element 314 is compressed to generate a reset force, and the fifth elastic element 37 is compressed under the guidance and limiting of the ejector needle 26 to generate a reset force. Subsequently, the stop 321, along with the upper blind hole 322, the groove channel 323, and the protrusion 324, is spring-loaded by the seventh elastic element 325. Under the action of force, it slides downward along the inside of the sliding cavity 22, thereby moving the safety lock switch 32 from the first predetermined position above the sliding cavity 22 to the second predetermined position below. The bottom surface of the stop block 321 is in contact with the top surface of the push rod 312. At this time, by using the snap-fit ​​cooperation between the limiting platform 311 and the stop block 321, the stop block 321 can limit the safety lock push block 31, thereby restricting the safety lock push block 31 from moving towards the patient under the elastic force of the sixth elastic member 314. In addition, the stop block 321 will restrict the firing rod of the firing module 20 from moving away from the patient. The firing button of the external biopsy needle is in an inoperable state under the limitation of the elastic positioning pin 25, and the external biopsy needle is in the safety lock state.

[0031] After the upper winding module of the external biopsy needle is reset, the convex groove 324 is pushed upward, and the lower bottom surface of the stop block 321 separates from the upper top surface of the push rod 312. The stop block 321 moves from the second predetermined position below the sliding cavity 22 to the first predetermined position above. At this time, the stop block 321 ends its limiting effect on the safety lock push block 31 and the firing rod of the firing module 20. The limiting platform 311, together with the push rod 312, moves towards the patient end under the elastic action of the sixth elastic element 314. When the safety lock push block 31 is reset to its first predetermined position, it limits the safety lock switch 32. At this time, the firing rod of the firing module 20, together with the firing button, can slide away from the patient end through the groove channel 323. The elastic positioning pin 25 releases the limitation on the firing button, and the firing button is in an operable state. The external biopsy needle is in a ready-to-fire state.

[0032] Each time the external biopsy needle completes its winding operation, the safety locking device 3 is activated, locking itself in place and rendering the firing button inoperable. At this time, the external biopsy needle is in a safe state. Then, by toggling the safety lock switch 32, the safety lock is unlocked, the firing button becomes operable, and the external biopsy needle is ready to fire. This cycle repeats, thereby enabling the locking and control of the external biopsy needle to prevent accidental firing and harm to the patient. This, in turn, ensures the smoothness of pathological tissue collection and improves collection efficiency.

[0033] In summary, the present invention, employing the above-described structure, has the advantages of effectively locking and controlling the biopsy needle to avoid accidental firing and causing harm to the patient, and improving the efficiency of pathological tissue collection.

[0034] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. An automatic needle locking structure for a biopsy needle comprising an inner housing (2) provided on the side wall of the distal end of the housing (10) of the biopsy needle outside through an outer housing (1) away from the patient; characterized in that: The inner shell (2) is provided with a safety locking device (3) connected with the firing module (20) of the biopsy needle outside for locking the firing state of the biopsy needle to avoid the patient injury caused by the misfiring.

2. The automatic needle-locking structure for a biopsy needle according to claim 1, characterized by: The inner shell (2) comprises an inner shell body (21) installed on the sidewall of the shell (10) away from the patient through the bolt matched with the outer shell (1), a sliding cavity (22) is formed on one side of the inner shell body (21), a first through hole (23) and a second through hole (24) are sequentially arranged from top to bottom at the outer end in the sliding cavity (22), wherein the outer firing module (20) is movably connected with the first through hole (23) and is position-limited by the safety locking device (3).

3. The automatic needle-locking structure for a biopsy needle according to claim 2, characterized by: The inner shell (2) further comprises a ejector pin (26) arranged on the inner wall of the inner shell body (21) close to the side of the sliding cavity (22), a fifth elastic member (27) is sleeved on the ejector pin (26) and one end of the fifth elastic member (27) is connected with the inner wall of the inner shell body (21), and the other end of the fifth elastic member (27) is connected with the corresponding cavity of the upper chord module (30) of the biopsy needle outside.

4. The automatic needle-locking structure for a biopsy needle according to claim 3, characterized by: The safety locking device (3) comprises a safety lock push block (31) and a safety lock switch (32) sequentially arranged from bottom to top in the sliding cavity (22), wherein one end of the safety lock push block (31) is connected with the corresponding cavity of the inner wall of the outer shell (1), and one end of the safety lock switch (32) is connected with the top of the sliding cavity (22).

5. The automatic needle-locking structure for a biopsy needle according to claim 4, characterized by: The safety lock push block (31) comprises a limiting platform (311) arranged at the lower end of the sliding cavity (22), a push rod (312) movably penetrating through the second through hole (24) is arranged on the inner wall of the limiting platform (311) and is used for movably connecting with the corresponding part of the upper chord module (30), a side blind hole (313) is formed on the outer wall of the limiting platform (311), and a sixth elastic member (314) connected with the corresponding cavity of the inner wall of the outer shell (1) is arranged on the side blind hole (313).

6. The automatic needle-locking structure for a biopsy needle according to claim 5, characterized by: The safety lock switch (32) comprises a stop block (321) arranged on the sliding cavity (22) and located above the limiting platform (311), a convex groove (324) is arranged on the upper end of one side of the stop block (321), a concave groove channel (323) is arranged below the one side of the stop block (321) and located below the convex groove (324), an upper blind hole (322) is formed on the top of the stop block (321), and a seventh elastic member (325) connected with the top of the sliding cavity (22) is arranged on the upper blind hole (322).

7. The automatic needle-locking structure for a biopsy needle according to claim 6, characterized by: The fifth elastic member (27), the sixth elastic member (314) and the seventh elastic member (325) are all made of springs.

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