A double-firing biopsy gun with a bottom safety lock

Abstract

A double-trigger biopsy gun with a bottom safety lock, comprising a biopsy gun body, the biopsy gun body including a gun body housing, on which an A key and a D key are provided for correspondingly triggering an inner core needle and an outer tube needle, and a bottom safety lock for restricting the downward pressing of the A key and the D key is provided at the bottom of the gun body housing. Compared with the prior art, in the present invention, a safety lock is provided on the bottom surface of the gun body. When the safety lock slider is pushed to the front end of the safety lock slider movement channel, the safety lock slider in the safety lock abuts against the lower parts of the A key and the D key, restricting the downward pressing of the A key and the D key, thereby locking the A key and the D key. When a triggering operation is required, the safety lock slider is pulled to the rear end of the safety lock slider movement channel, and the safety lock slider releases the restriction on the A key and the D key. Pressing the two keys can trigger the biopsy gun. The setting of the safety lock can well avoid the safety hazards brought to the user by misoperation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a double-firing biopsy gun with a bottom safety lock. Background Art

[0002] A tumor is a lesion formed by the abnormal proliferation of a single cell in a local tissue at the gene level under the action of various carcinogenic factors, which generally loses normal regulation of its growth, and is generally divided into two major categories: benign and malignant.

[0003] Early detection, correct diagnosis, and timely treatment have an important impact on the prognosis. With the continuous upgrading of examination means and methods, the diagnostic accuracy rate has gradually increased. However, there is still a large part of tumors that do not have typical imaging features, making diagnosis difficult. A correct diagnosis requires the combination of clinical, imaging, and pathology. Among them, pathological diagnosis plays a key role in the selection of treatment plans. Percutaneous biopsy is the main way to obtain pathological diagnosis.

[0004] A disposable biopsy needle is a device used to obtain histological specimens by cutting through percutaneous puncture of organs or tissues under ultrasound or CT imaging for pathological diagnosis.

[0005] Currently, biopsy needles mainly include an outer cannula needle, an inner core needle, and a sampling groove is provided on the inner core needle. The outer cannula needle is sleeved outside the inner core needle and is installed on the needle holder together. The specimen is obtained by a controllable ejection device. When in use, under image monitoring, when percutaneous puncture reaches the sampling site, the inner core needle first penetrates so that the sampling groove is located at the lesion, and then the ejection device shoots out the outer cannula needle. The outer cannula needle rushes forward, cutting the tissue at the lesion site into the sampling groove of the inner core needle, and the biopsy needle can be pulled out to obtain the sampling specimen.

[0006] Existing double-firing biopsy needles include fully automatic biopsy needles and semi-automatic biopsy needles. However, most biopsy needles do not have a firing lock structure, and it is easy to cause additional harm to the user or the patient when there is a misoperation (firing button). Summary of the Invention

[0007] In view of the above defects in the prior art, the present invention provides a double-firing biopsy gun with a bottom safety lock as follows:

[0008] The technical solution of the present invention is implemented as follows:

[0009] A double-firing biopsy gun with a bottom safety lock includes a biopsy gun body. The biopsy gun body includes a gun body housing. An A key and a D key for correspondingly firing the inner core needle and the outer cannula needle are provided on the gun body housing. A bottom safety lock for restricting the downward pressing of the A key and the D key is provided at the bottom of the gun body housing.

[0010] Preferably, the bottom safety lock includes a safety lock pull block and a safety lock pull block moving channel. The front end of the safety lock pull block moving channel is arranged in the pressing areas of key A and key D. The safety lock pull block can be inserted into the pressing areas of key A and key D to limit the downward pressing of key A and key D.

[0011] Preferably, the safety lock pull block moving channel includes a socket arranged at the rear end of the gun body housing. The safety lock pull block is inserted into the rear end and the front end of the safety lock pull block moving channel through the socket in sequence. The rear end of the safety lock pull block moving channel is provided with a positioning component for positioning the safety lock pull block pushed to the bottom and pulled out to the bottom.

[0012] Preferably, the safety lock pull block includes an insertion plate and a pull handle. The insertion plate is provided with a front positioning hole and a rear positioning hole that match the positioning component. The positioning component includes a push rod accommodation space arranged on the side of the safety lock pull block moving channel. A spring is arranged in the push rod accommodation space. One end of the spring abuts against the bottom of the push rod accommodation space, and the other end abuts against a push rod. The end of the push rod is hemispherical, and the end of the push rod can enter and exit the front positioning hole and the rear positioning hole when the safety lock pull block moves.

[0013] Preferably, the front end of the insertion plate is provided with a limiting step, and the inner side of the socket is provided with a limiting block that cooperates with the limiting step to prevent the safety lock pull block from being pulled out of the safety lock pull block moving channel.

[0014] Preferably, the pull handle is provided with anti-slip grooves.

[0015] Preferably, a circle of convex rings is arranged on the outer side of the front end of the push rod, and the spring abuts against the convex rings.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the double-trigger biopsy gun with a bottom safety lock of the present invention, a safety lock is arranged on the bottom surface of the gun body. When the safety lock pull block is pushed to the front end of the safety lock pull block moving channel, the safety lock pull block in the safety lock abuts against the lower parts of key A and key D, restricting the downward pressing of key A and key D, thereby locking key A and key D. When a firing operation is required, the safety lock pull block is pulled to the rear end of the safety lock pull block moving channel, and the safety lock pull block releases the restriction on key A and key D. Pressing the two keys can fire the biopsy gun. The setting of the safety lock can well avoid the safety hazards brought to the user by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the double-trigger biopsy gun with a bottom safety lock of the present invention;

[0019] Figure 2 is a side cross-sectional view (unlocked state) of the double-trigger biopsy gun with a bottom safety lock of the present invention;

[0020] Figure 3 is Figure 2 the enlarged view of part A in

[0021] Figure 4 the structural schematic diagram (removing the upper shell) of the double - firing biopsy gun with a bottom safety lock according to the present invention;

[0022] Figure 5 the side sectional view (locked state) of the double - firing biopsy gun with a bottom safety lock according to the present invention;

[0023] Figure 6 the structural schematic diagram of the safety lock pull block according to the present invention;

[0024] Figure 7 the structural schematic diagram of the upper shell according to the present invention.

[0025] In the figure: gun body housing 100, A key 110, D key 120, safety lock pull block 200, insertion plate 210, front positioning hole 211, rear positioning hole 212, limiting step 213, pull handle 220, safety lock pull block moving channel 300, A - key and D - key pressing area 310, socket 320, limiting block 321, ejector rod accommodating space 330, spring 340, ejector rod 350, convex ring 351, rod body 352. Specific embodiments

[0026] Next, the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] Such as Figures 1 to 7As shown, a double-shot biopsy gun with a bottom safety lock comprises a biopsy gun body, the biopsy gun body comprises a gun body shell 100, the gun body shell 100 is provided with an A key 110 and a D key 120 for correspondingly firing an inner core needle and an outer tube needle, the gun body shell 100 comprises an upper shell and a lower shell, the A key 110 and the D key 120 are arranged on the upper shell, and a bottom safety lock for limiting the pressing of the A key 110 and the D key 120 is arranged at the bottom of the gun body shell 100. The bottom safety lock comprises a safety lock pull block 200 and a safety lock pull block moving channel 300, the front end of the safety lock pull block moving channel 300 is arranged in the A key and the D key pressing area 310, the safety lock pull block 200 can be inserted into the A key and the D key pressing area 310 to limit the pressing of the A key 110 and the D key 120, thereby locking the A key and the D key to avoid misfiring. The safety lock pull block moving channel 300 includes a socket 320 arranged at the rear end of the gun body shell 100, and the safety lock pull block 200 is inserted into the rear end and the front end of the safety lock pull block moving channel 300 in sequence through the socket 320. The rear end of the safety lock pull block moving channel 300 is provided with a positioning component for positioning the safety lock pull block 200 to be pushed to the bottom and pulled out to the bottom. The positioning component is used to determine whether the safety lock pull block 200 is pushed or pulled out to the position to increase the operating feel. The safety lock block 200 includes an insert plate 210 and a handle 220. The insert plate 210 is provided with a front positioning hole 211 and a rear positioning hole 212 that match the positioning assembly. The front positioning hole is used for positioning the safety lock block 200 when the firing key is locked, and the rear positioning hole 212 is used for positioning when the firing key is locked. The positioning assembly includes a push rod accommodating space 330 arranged on the side of the safety lock block moving channel 300. A spring 340 is arranged in the push rod accommodating space 330. One end of the spring 340 abuts against the bottom of the push rod accommodating space 330, and the other end abuts against a push rod 350. The end of the push rod 350 is hemispherical, which facilitates the end of the push rod 350 to squeeze out of the front positioning hole 211 and the rear positioning hole 212. The end of the push rod 350 can enter and exit the front positioning hole 211 and the rear positioning hole 212 when the safety lock block 200 moves. The front end of the plug plate 210 is provided with a limiting step 213, and the inner side of the socket 320 is provided with a limiting block 321 that cooperates with the limiting step 213 to prevent the safety lock pull block 200 from being pulled out of the safety lock pull block moving channel 300. When the safety lock pull block 200 is pulled to the rear end of the safety lock pull block moving channel 300, the limiting block 321 will support the limiting step 213, so that the safety lock pull block 200 will not be pulled out of the socket 320 and out of the gun body shell 100. The pull handle 220 is provided with an anti-slip groove 221, which improves the user's operating feel.A convex ring 351 is provided on the outer side of the front end of the ejector rod 350, the spring 340 abuts against the convex ring 351, and a part of the rod body 352 of the ejector rod 350 can be inserted into the spring 340 circle, so that the spring 340 also plays a limiting role on the ejector rod 350 to prevent the ejector rod 350 from falling off from the ejector rod accommodation space 330.

[0028] From the structure of the double-trigger biopsy gun with a bottom safety lock of the present invention, it can be seen that a safety lock is provided on the bottom surface of the gun body. When the safety lock pull block is pushed to the front end of the safety lock pull block moving channel, the safety lock pull block in the safety lock abuts against the lower parts of the A key and the D key, restricting the downward pressing of the A key and the D key, thereby locking the A key and the D key. When a firing operation is required, the safety lock pull block is pulled to the rear end of the safety lock pull block moving channel, the safety lock pull block releases the restriction on the A key and the D key, and pressing the two keys can fire the biopsy gun. The setting of the safety lock can well avoid the safety hazards brought to the user by misoperation.

Claims

1. A double-firing biopsy gun with a bottom safety lock, characterized in that, It includes a biopsy gun body, and the biopsy gun body includes a gun body housing. An A key and a D key for correspondingly firing an inner core needle and an outer tube needle are arranged on the gun body housing. A bottom safety lock for restricting the downward pressing of the A key and the D key is arranged at the bottom of the gun body housing; The bottom safety lock includes a safety lock pull block and a safety lock pull block moving channel. The front end of the safety lock pull block moving channel is arranged in the downward pressing area of the A key and the D key. The safety lock pull block can be inserted into the downward pressing area of the A key and the D key to restrict the downward pressing of the A key and the D key; The safety lock pull block moving channel includes a socket arranged at the rear end of the gun body housing. The safety lock pull block is inserted into the rear end and the front end of the safety lock pull block moving channel through the socket in sequence. A positioning component for positioning the safety lock pull block pushed to the bottom and pulled out to the bottom is arranged at the rear end of the safety lock pull block moving channel; The safety lock pull block includes a plug board and a pull handle. Front positioning holes and rear positioning holes matching the positioning component are arranged on the plug board. The positioning component includes a top rod accommodating space arranged on the side of the safety lock pull block moving channel. A spring is arranged in the top rod accommodating space. One end of the spring abuts against the bottom of the top rod accommodating space, and the other end abuts against a top rod. The end of the top rod is hemispherical. The end of the top rod can enter and exit the front positioning hole and the rear positioning hole when the safety lock pull block moves. Anti-slip grooves are arranged on the pull handle, and a ring of convex rings is arranged on the outer side of the front end of the top rod. The spring abuts against the convex rings; 2. The double-firing biopsy gun with a bottom safety lock according to claim 1, characterized in that A limiting step is arranged at the front end of the plug board, and a limiting block for cooperating with the limiting step to prevent the safety lock pull block from being pulled out of the safety lock pull block moving channel is arranged on the inner side of the socket.

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