CN218960951U

CN218960951U - Safety lock mechanism of puncture biopsy gun and puncture biopsy gun

Info

Publication number: CN218960951U
Application number: CN202222151853.8U
Authority: CN
Inventors: 陈晓望; 周徐亮; 张婵娟
Original assignee: Zhejiang Curaway Medical Technology Co ltd
Current assignee: Zhejiang Curaway Medical Technology Co ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2023-05-05
Anticipated expiration: 2032-08-16

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a safety lock mechanism of a puncture biopsy gun and the puncture biopsy gun. The utility model realizes simultaneous completion of the winding and locking processes, reduces the operation flow of the puncture biopsy gun, simultaneously completes the winding and locking processes, and avoids the accident of needle emergence caused by forgetting the locking process.

Description

Safety lock mechanism of puncture biopsy gun and puncture biopsy gun

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a safety lock mechanism of a puncture biopsy gun and the puncture biopsy gun.

Background

A puncture biopsy gun, also called biopsy needle, is a device for percutaneously puncturing an organ or tissue under ultrasound or CT images, obtaining a histological specimen in a cutting manner for pathological diagnosis.

The biopsy gun mainly comprises an outer tube needle, an inner tube needle and a sampling groove arranged on the inner tube needle, wherein the outer tube needle is sleeved outside the inner tube needle, the outer tube needle and the sampling groove are installed on a needle seat together, a controllable ejection device is used for controlling the ejection device to obtain a specimen, when the biopsy gun is used, the ejection device of the biopsy gun is firstly wound up, then a safety lock is locked, a button of the ejection device is prevented from being pressed down carelessly to eject the needle, then the biopsy gun is opened when the biopsy gun is subjected to percutaneous puncture to a sampling position under the condition of image monitoring, a D button is pressed down, the inner tube needle is firstly penetrated into the sampling groove to be located at a focus, then an A button is pressed down, the ejection device ejects the outer tube needle, the outer tube needle is used for forward-rushing, tissue of the lesion position is cut in the sampling groove of the inner tube needle, and the biopsy needle is pulled out, so that the sampling specimen can be obtained. When the existing biopsy gun is operated, the next operation can be performed by first winding and then locking and then unlocking, the operation flow is complex, the condition of forgetting to lock is easy to occur, and the accident of going out the needle is caused.

Disclosure of Invention

The utility model aims to provide a safety lock mechanism of a biopsy puncture gun and the biopsy puncture gun, which are used for solving the technical problem that the operation flow of the existing biopsy gun is complicated.

In order to achieve the above purpose, the utility model relates to a safety lock mechanism of a puncture biopsy gun and a puncture biopsy gun, which concretely adopts the technical scheme that:

the utility model provides a puncture biopsy gun's safety lock mechanism, includes safety lock and backstop piece, the safety lock penetrates the casing of biopsy gun to can slide in the casing, the button has on the casing, the safety lock is through sliding in order to block or avoid the button back, realizes the locking and unlocking of button, backstop piece sets up in next door neighbour button one side for prevent the unexpected slip of safety lock after the safety lock locks in place, the safety lock is relative with the last chord pull rod bottom of biopsy gun, the last chord pull rod sets up on the vertical center pin of button, and when pulling the last chord pull rod, safety lock and last chord pull rod bottom butt, safety lock is promoted simultaneously, realizes that the last chord is locked simultaneously.

Further, the safety lock comprises a push button and a sliding rod, the sliding rod is vertically connected with the push button, the push button is arranged outside the shell of the biopsy gun, and when the push button is pushed, the sliding rod slides up and down in a sliding groove in the shell, so that unlocking and unlocking are realized.

Further, the stop piece comprises an elastic strip, a protruding part is arranged on the elastic strip, and when the sliding rod slides over the protruding part under the action of external force, the elastic strip is pressed down and bent by force to scratch the sliding rod; when the sliding rod slides in place, the elastic strip rebounds, the protruding part is abutted with the edge of the sliding rod, and the sliding of the sliding rod is limited.

Further, the elastic strip is provided with a protruding part, and the protruding part is provided with a protruding part.

Further, the two sides of the protruding portion are provided with guide inclined planes, two edges of the bottom surface of the sliding rod are provided with inclined planes with the same angle as the guide inclined planes, when the sliding rod slides across the protruding portion under the action of external force, the inclined planes of the edges of the sliding rod are contacted with the guide inclined planes to form an oblique driving force, and the elastic strip is pressed downwards to bend so as to scratch the sliding rod.

Further, the safety lock comprises a limiting piece, wherein the safety lock is provided with a limiting groove, and the limiting piece is inserted into the limiting groove and fixed on the shell to limit the sliding rod from falling out of the shell.

The utility model also discloses a puncture biopsy gun, which comprises the safety lock mechanism, wherein a catapulting device is arranged in a shell of the biopsy gun and comprises an upper chord pull rod, the catapulting device is connected with an inner needle and an outer needle, the inner needle and the outer needle extend out of the shell through a through hole in the shell 1, the keys comprise an A key and a D key, the A key and the D key are connected with the catapulting device of the puncture biopsy gun, the A key is used for controlling the catapulting of the outer needle tube, the D key is used for controlling the catapulting of the inner needle, and the upper chord pull rod is used for tensioning a spring before catapulting.

Further, at least one edge of the key A is adjacent to the edge of the key D, the back surface of the key A is provided with a convex edge A, the back surface of the key D is provided with a convex edge B, the convex edge A and the convex edge B are arranged adjacently, and the convex edge A and the convex edge B are covered when the safety lock is locked, so that the key A and the key D are limited to be pressed down.

Further, the A key is close to the A convex edge and is provided with a groove, the width of the groove is matched with the width of the sliding rod of the safety lock, the sliding rod is located above the groove during unlocking, the groove provides a pressing space for the A key, at the moment, the A key is unlocked, and the D key is unlocked simultaneously due to no blocking.

The safety lock mechanism of the puncture biopsy gun and the puncture biopsy gun have the following advantages: the stop piece is arranged close to the key, the push point of the winding pull rod is close to the stop piece, the sliding rod can be directly pushed in the winding process of the winding pull rod, the simultaneous completion of the winding and locking processes is realized, the operation flow of the puncture biopsy gun is reduced, the winding and locking processes are simultaneously completed, and the accidental needle outlet accident caused by forgetting the locking process is avoided.

Drawings

FIG. 1 is a schematic view of the external structure of a needle biopsy gun of the present utility model;

FIG. 2 is a schematic view of the structure of the safety lock in the unlocked state;

FIG. 3 is a schematic view of the safety lock of the present utility model;

FIG. 4 is a schematic view showing the structure of the safety lock of the present utility model in a locked state;

FIG. 5 is a schematic view of a stopper according to the present utility model;

FIG. 6 is a schematic view of the construction of the upper chord of the present utility model when released;

FIG. 7 is a schematic diagram showing the structure of the upper chord tension rod according to the present utility model;

the figure indicates: 1. a housing; 11. a sliding groove; 2. a bond; 3. a D bond; 21. a convex edge A; 22. a groove; 31. b convex edge; 4. a safety lock; 41. pushing and twisting; 42. a slide bar; 421. an inclined plane; 5. a stopper; 422. a limit groove; 51. an elastic strip; 52. a protruding member; 521. a boss; 521-1, a guiding inclined plane; 6. a limiting piece; 7. and (5) a winding pull rod.

Detailed Description

For a better understanding of the objects, structure and function of the present utility model, a safety lock mechanism for a piercing biopsy gun and the piercing biopsy gun according to the present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the puncture biopsy gun comprises a shell 1, wherein the shell 1 consists of an upper shell and a lower shell, the upper shell and the lower shell are folded to form the shell 1, an ejection device is arranged in the shell 1 and comprises an upper chord pull rod 7, the ejection device is connected with an inner needle and an outer needle, the inner needle and the outer needle extend out of the shell 1 through holes in the shell 1, keys are arranged on the shell 1 and comprise an A key 2 and a D key 3, the A key 2 and the D key 3 are connected with the ejection device, the A key 2 is used for controlling ejection of the outer needle tube, the D key 3 is used for controlling ejection of an inner needle core, and the upper chord pull rod 7 is used for tensioning a spring before ejection.

At least one edge of the A key 2 and the D key 3 are adjacent, as shown in fig. 2, the back of the shell where the A key 2 and the D key 3 are located is provided with an A convex edge 21, the back of the D key 3 is provided with a B convex edge 31, and the A convex edge 21 and the B convex edge 31 are adjacently arranged. The safety lock mechanism comprises a safety lock 4, a stop piece 5 and a limiting piece 6, wherein the safety lock 4 penetrates into the shell 1 from the side face of the shell 1 and can slide in the shell 1, as shown in fig. 3, the safety lock 4 comprises a push button 41 and a sliding rod 42, the sliding rod 42 is vertically connected with the push button 41, the push button 41 is arranged outside the shell 1, lines for increasing friction force are formed on the surface of the push button 41, and when a finger pushes the push button 41, the sliding rod 42 slides up and down in a sliding groove 11 in the shell 1 to realize unlocking and unlocking. The slide groove 11 serves to limit the sliding range of the slide lever 42. Specifically, as shown in fig. 4, when the slide bar 42 slides to the bottom of the slide groove 11, the slide bar 42 just covers the a flange 21 and the B flange 31 at the same time, and at this time, the a key 2 and the D key 3 cannot be pressed down due to the blocking of the slide bar 42, thereby realizing locking. As shown in fig. 2, the position of the a key 2 near the a flange 21 is provided with a groove 22, the width of the groove 22 is matched with the width of the sliding rod 42, when the sliding rod 42 slides to the top of the sliding groove 11, the sliding rod 42 is positioned above the groove 22, the groove 22 provides a pressing space for the a key, and at the moment, the a key is unlocked, and the D key is unlocked due to no blocking.

In order to prevent the safety lock 4 from sliding during locking, as shown in fig. 5, a stopper 5 is provided on the housing 1, the stopper 5 includes an elastic strip 51 provided on the housing 1 adjacent to the a key 2, the elastic strip 51 has a protrusion 52, the protrusion 52 is used for increasing the height of the stopper 5, the protrusion 52 has a protrusion 521, both sides of the protrusion 521 have guiding inclined planes 521-1, both edges of the bottom surface of the sliding rod 42 have inclined planes 421 having the same angle as the guiding inclined planes 521-1, and when the sliding rod 42 slides over the protrusion 521 under the action of an external force, the inclined planes 421 of the edges of the sliding rod 42 contact with the guiding inclined planes 521-1 to form an oblique pushing force, so that the elastic strip 51 is forced to bend downwards for the sliding rod 42 to scratch. When the slide bar 42 slides into place, the elastic strip 51 springs back, and the boss 521 abuts against the edge of the slide bar 42, limiting the sliding of the slide bar 42.

As shown in fig. 3, the sliding rod 42 has a limit groove 422, and the limit member 6 is inserted into the limit groove 422 from above the sliding groove 11 of the housing 1 and fixed to the housing 1, so as to limit the sliding rod 42 from being removed from the housing 1.

As shown in fig. 6 and 7, the upper chord pull rod 7 is arranged on the vertical central shaft of the a key 2, the sliding rod 42 is opposite to the bottom of the upper chord pull rod 7, when the upper chord pull rod 7 is pulled, the bottom of the upper chord pull rod 7 is abutted with the sliding rod 42, and the sliding rod 42 is simultaneously pushed to slide to the convex edge 21 and the convex edge 31 of the a, so that the upper chord is simultaneously locked and locked. The winding pull rod 7 is rebounded to the original position after winding, and the safety lock is unlocked after being slid upwards.

In the prior art, the stop piece 5 is arranged at a position close to the edge of the shell, the rod body of the sliding rod 42 is relatively long, the point distance between the upper chord pull rod 7 and the sliding rod 42 is relatively far from the stop piece 5, a lever is formed, and the sliding rod 42 cannot be pushed to scratch the stop piece 5. The position of the stop piece 5 is close to the A key, the pushing point of the winding pull rod 7 is close to the position of the stop piece 5, the sliding rod 42 can be directly pushed in the winding process of the winding pull rod 7, the simultaneous completion of the winding and locking processes is realized, the operation flow of the puncture biopsy gun is reduced, the simultaneous completion of the winding and locking processes is realized, and the accident of needle emergence caused by forgetting the locking process is avoided.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a puncture biopsy gun's safety lock mechanism, includes safety lock (4) and backstop piece (5), safety lock (4) penetrate biopsy gun's casing (1) to can slide in casing (1), have the button on casing (1), safety lock (4) are through sliding in order to block or avoid the button back, realize the locking and the unblock of button, a serial communication port, backstop piece (5) set up in next-door neighbour button one side for prevent the unexpected slip of safety lock (4) after locking in place on safety lock (4), safety lock (4) are relative with last chord pull rod (7) bottom of biopsy gun, last chord pull rod (7) set up on the vertical center pin of button, when pulling last chord pull rod (7), safety lock (4) and last chord pull rod (7) bottom butt, safety lock (4) are promoted simultaneously, realize going up chord while safety lock (4) and locking.

2. The safety lock mechanism of the puncture biopsy gun according to claim 1, wherein the safety lock (4) comprises a push button (41) and a sliding rod (42), the sliding rod (42) is vertically connected with the push button (41), the push button (41) is arranged outside a shell (1) of the biopsy gun, and when the push button (41) is pushed, the sliding rod (42) slides up and down in a sliding groove (11) in the shell (1) to realize unlocking and unlocking.

3. The safety lock mechanism of a biopsy gun according to claim 2, wherein the stopper (5) comprises an elastic strip (51), the elastic strip (51) is provided with a protruding part (521), and when the sliding rod (42) slides over the protruding part (521) under the action of external force, the elastic strip (51) is pressed down and bent by the force of the sliding rod (42) to scratch; when the sliding rod (42) slides in place, the elastic strip (51) rebounds, the convex part (521) is abutted with the edge of the sliding rod (42) to limit the sliding of the sliding rod (42).

4. A safety lock mechanism for a biopsy gun according to claim 3, wherein the resilient strip (51) has a protrusion (52) thereon, the protrusion (52) having a protrusion (521) thereon.

5. A safety lock mechanism for a biopsy gun according to claim 3, wherein the two sides of the protruding part (521) are provided with guiding inclined planes (521-1), two edges of the bottom surface of the sliding rod (42) are provided with inclined planes (421) with the same angle as the guiding inclined planes (521-1), and when the sliding rod (42) slides across the protruding part (521) under the action of external force, the inclined planes (421) of the edges of the sliding rod (42) are contacted with the guiding inclined planes (521-1) to form an oblique pushing force, so that the elastic strip (51) is pressed down and bent for the sliding rod (42) to scratch.

6. The safety lock mechanism of the puncture biopsy gun according to claim 1, comprising a limiting piece (6), wherein the safety lock (4) is provided with a limiting groove (422), the limiting piece (6) is inserted into the limiting groove (422) and fixed on the shell (1), and the sliding rod (42) is limited to be separated from the shell (1).

7. A puncture biopsy gun comprising a safety lock mechanism according to any of claims 1-6, characterized in that the housing (1) of the biopsy gun is provided with a shoot device comprising an upper chord pull rod (7), the shoot device is connected with an inner core needle and an outer tube needle, the inner core needle and the outer tube needle extend out of the housing (1) through a through hole in the housing (1), the keys comprise an a key (2) and a D key (3), the a key (2) and the D key (3) are connected with the shoot device of the puncture biopsy gun, the a key (2) is used for controlling the shoot of the outer needle tube, the D key (3) is used for controlling the shoot of the inner core needle, and the upper chord pull rod (7) is used for tensioning a spring before the shoot.

8. The biopsy gun according to claim 7, wherein the A key (2) and the D key (3) are adjacent to each other on at least one side, the back of the A key (2) is provided with an A convex edge (21), the back of the D key (3) is provided with a B convex edge (31), the A convex edge (21) and the B convex edge (31) are adjacently arranged, and the safety lock (4) covers the A convex edge (21) and the B convex edge (31) when locked, so that the A key (2) and the D key (3) are limited to be pressed down.

9. The puncture biopsy gun according to claim 8, characterized in that the a key (2) is provided with a groove (22) near the a convex edge (21), the width of the groove (22) is matched with the width of the sliding rod (42) of the safety lock (4), the sliding rod (42) is positioned above the groove (22) during unlocking, the groove (22) provides a pressing space for the a key (2), at the moment, the a key (2) realizes unlocking, and the D key (3) simultaneously realizes unlocking due to no blocking.