CN113303839A - Safety locking device of semi-automatic biopsy needle - Google Patents
Safety locking device of semi-automatic biopsy needle Download PDFInfo
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- CN113303839A CN113303839A CN202110692331.6A CN202110692331A CN113303839A CN 113303839 A CN113303839 A CN 113303839A CN 202110692331 A CN202110692331 A CN 202110692331A CN 113303839 A CN113303839 A CN 113303839A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B2010/0208—Biopsy devices with actuators, e.g. with triggered spring mechanisms
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- General Health & Medical Sciences (AREA)
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- Surgical Instruments (AREA)
Abstract
The invention relates to a safety locking device of a semi-automatic biopsy needle, wherein a control structure of the biopsy needle comprises a shell, an outer needle seat positioned in the shell and a handle used for loading or firing the biopsy needle, the handle comprises a handheld section, a transition section and a connecting section which are sequentially connected together, and the connecting section of the handle is inserted into the shell and then connected with the outer needle seat; a through hole is formed in the transition section of the handle, and an included angle of a preset angle is formed between the axis of the through hole and the length direction of the handle; a locking piece capable of sliding back and forth along the axis direction of the through hole is arranged in the through hole, one end of the locking piece is bent towards the connecting section of the handle to form a stroke limiting part, and the stroke limiting part extends out of the transition section and then extends for a preset length towards the connecting section; the locking piece is provided with two elastic buckles matched with the through hole. The invention solves the problems of inconvenient installation, easy falling, operation trouble and the like of the safety locking device in the prior art.
Description
Technical Field
The invention relates to a safety locking device of a semi-automatic biopsy needle, belonging to the technical field of medical instruments.
Background
The puncture biopsy under the guidance of the ultrasound is applied under the monitoring of the ultrasound, obtains target tissues of organ tissues by a cutting mode to carry out pathological diagnosis, such as mammary gland, thyroid gland, kidney, liver, lymph node and the like, is the fastest, simple, convenient and safe method for early diagnosing the benign and malignant target tissues, and has the advantages of small damage, small risk, same reliable result and the like. A biopsy needle is a very important tool involved in needle biopsy. When the semi-automatic biopsy needle is operated, the inner needle and the outer needle of the biopsy needle enter the focus position of a patient, the biopsy needle is used for sampling, and pathological analysis is carried out after focus tissues of the patient are taken out.
A conventional semi-automatic biopsy needle and its operation structure are referred to in chinese patent application No. CN 202021260773.0 entitled "an operation structure and biopsy needle", and the operation structure generally includes a housing, an outer needle holder, a sliding platform, a handle, and a spring, wherein the sliding platform is disposed in the housing and connected to the housing. A first sliding chute and a second sliding chute are arranged on the sliding table along the same extending direction, the first sliding chute and the second sliding chute are respectively in sliding fit with the outer needle seat and the handle, and one end of the handle extending into the shell is abutted against the outer needle seat; therefore, when the handle slides relative to the second sliding groove under the action of external force, the sliding direction of the handle is consistent with that of the outer needle seat, so that the outer needle seat can be driven to slide relative to the second sliding groove along the same direction, the spring is compressed, the limit buckle is clamped with the outer needle seat (the process is called as loading), or the limit buckle is separated from the outer needle seat and the spring is released (the process is called as firing). However, the existing semi-automatic biopsy needle generally has no safety locking device, and when the needle is used, the handle is pulled to be loaded into a chamber, and then the handle is pushed forwards to carry out firing, so that the false firing of the biopsy needle can be caused in the operation process.
According to the knowledge of the applicant, a separated safety locking device is already available in the market, and before surgical sampling, the separated safety locking device is clamped between a triggering handle and a biopsy needle main body, so that the triggering stroke of the handle is limited and further cannot be triggered; when the percussion is needed, the safety locking device is pulled away, and then the percussion is carried out; however, the applicant finds that such a safety locking device is not only inconvenient to install and operate, but also easy to fall off during use, which increases difficulty in the surgical procedure.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the safety locking device can avoid false triggering of the biopsy needle in the operation process, and the device cannot easily fall off in the use process, so that the operation in the operation process is facilitated.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a semi-automatic biopsy needle safety locking device comprises a shell, an outer needle seat positioned in the shell and a handle used for loading or firing a biopsy needle, wherein the handle comprises a handheld section, a transition section and a connecting section which are sequentially connected together;
a through hole is formed in the transition section of the handle, and an included angle of a preset angle is formed between the axis of the through hole and the length direction of the handle; a locking piece capable of sliding back and forth along the axis direction of the through hole is arranged in the through hole, one end of the locking piece is bent towards the direction of the connecting section of the handle to form a stroke limiting part, the stroke limiting part extends out of the transition section and then extends for a preset length towards the connecting section, and the locking piece is matched with the through hole in size;
the locking piece is provided with two elastic buckles matched with the through hole, wherein the elastic buckle close to the stroke limiting part is called a first elastic buckle, and the elastic buckle far away from the stroke limiting part is called a second elastic buckle; the head of the first elastic buckle is provided with a first protrusion facing the inner wall of the through hole, the head of the second elastic buckle is provided with a second protrusion facing the inner wall of the through hole, and the distance between the first protrusion and the second protrusion is not less than the length of the through hole; the distance between the stroke limiting part and the first protrusion is not greater than the length of the through hole.
The semi-automatic biopsy needle is triggered by pushing a certain stroke forwards by using a handle, and an internal spring of the biopsy needle is released. When the handle is used, the handle has a locking state and a non-locking state, and the locking state and the non-locking state can be switched as required by moving the locking piece along the through hole. When the stroke limiting part is abutted between the handle and the shell, the stroke of the handle is restricted by the stroke limiting part, so that the handle is limited to be incapable of being fired and is in a locking state at the moment; when the first protrusion and the second protrusion are respectively positioned at two sides of the through hole, the stroke limiting part is no longer positioned between the handle and the shell, so that the stroke of the handle is not hindered, and the handle is in a non-locking state.
When the handle is in a locking state, the first protrusion on the locking piece and the through hole form interference fit, and the locking piece cannot slide back under the action of friction force. When the handle is in an unlocked state, the first protrusion and the second protrusion are respectively positioned at two sides of the through hole, and the handle is clamped by the two elastic buckles, so that the whole locking piece can be prevented from falling from the handle.
The invention controls the handle to trigger the biopsy needle through the locking piece, and when the biopsy needle is in a locking state, the stroke of the handle is limited to avoid the false triggering of the biopsy needle in the operation process, so that the operation is simpler and more convenient; and when the locking piece is in a non-locking state, the locking piece can not fall off easily, so that the operation in the operation process is facilitated, and the problems that the safety locking device in the prior art is inconvenient to install, easy to fall off, causes operation troubles and the like are solved.
Drawings
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is one of the structural schematic views of the locking member.
Fig. 3 is a second schematic structural view of the locking member.
Fig. 4 is a schematic structural view of the handle.
FIG. 5 is a schematic diagram of an embodiment of the present invention in a locked state.
Reference numerals: 101. a handheld section; 102. a transition section; 103. a connecting section; 104. a through hole; 110. a biopsy needle; 130. a steering structure; 131. a housing; 134. a handle; 200. a locking member; 201. a stroke limiting part; 202. a first elastic buckle; 203. a second elastic buckle; 204. a first protrusion; 205. a second protrusion.
Detailed Description
Examples
In this embodiment, the manipulation structure 130 of the biopsy needle may refer to chinese patent with application number "CN 202021260773.0" named "one kind of manipulation structure and biopsy needle", and as shown in fig. 1, includes a housing 131, an outer needle seat located in the housing 131, and a handle 134 for loading or firing the biopsy needle. As shown in fig. 4, the handle 134 includes a holding section 101, a transition section 102 and a connecting section 103, which are connected together in sequence, and the connecting section 102 of the handle 134 is inserted into the housing 131 and then connected with the outer needle holder.
In the semi-automatic biopsy needle safety locking device of the present embodiment, as shown in fig. 1 and 4, a through hole 104 is provided on the transition section 102 of the pull handle 134, and an included angle of a preset angle is formed between an axis of the through hole 104 and a length direction of the pull handle 134 (the included angle is preferably 90 degrees, that is, the axis of the through hole 104 and the length of the pull handle 134 are perpendicular to each other); a locking piece 200 capable of sliding back and forth along the axis direction of the through hole 104 is arranged in the through hole 104, one end of the locking piece 200 is bent towards the connecting section of the handle 134 to form a stroke limiting part 201, and the stroke limiting part 201 extends out of the transition section and then extends for a preset length towards the connecting section 102. The locking piece 200 is matched with the size of the through hole 104, the cross section of the through hole 104 is preferably polygonal, semicircular or fan-shaped, and correspondingly, the outer contour of the locking piece is also polygonal, semicircular or fan-shaped; in this embodiment, a square through hole is adopted, so that the locking member 200 can be prevented from rotating in the through hole 104, and the locking effect is affected.
Two elastic buckles matched with the through hole 104 are arranged on the locking piece 200, wherein the elastic buckle close to the stroke limiting part 201 is called a first elastic buckle 202, and the elastic buckle far away from the stroke limiting part 201 is called a second elastic buckle 203; the head of the first elastic catch 202 is provided with a first protrusion 204 facing the inner wall of the through hole 104, the head of the second elastic catch 203 is provided with a second protrusion 205 facing the inner wall of the through hole, and the distance between the first protrusion 204 and the second protrusion 205 is not less than the length of the through hole 104. The distance between the stroke-limiting part 201 and the first protrusion 204 is not greater than the length of the through hole 104.
After the semi-automatic biopsy needle handle 134 is mounted to the main structure, the locking member 200 is inserted into the through hole of the handle 134, and the first elastic catch 203 is fully exposed from the through hole of the handle 134 to be mounted in place, as shown in fig. 1-3. The cross-sectional shape at the end of two elastic buckles in this embodiment all is arc, and elastic buckle is a lamellar body, and the lamellar body pressurized, easy elastic deformation, when the installation like this, elastic buckle deflects along arc to the inboard, promotes until first elastic buckle exposes always, and two elastic buckles no longer pressurized this moment, and elasticity resumes, and two elastic buckles just can block the handle, prevent that whole locking piece from dropping from the handle.
The semi-automatic biopsy needle is triggered by utilizing a certain stroke of forward pushing of the handle and releasing of an internal spring of the biopsy needle. In use, the handle 134 has a locked state and an unlocked state, and the locked state and the unlocked state can be switched as required by moving the locking member 200 along the through hole 104. As shown in fig. 5, when the stroke limiting portion 201 abuts between the handle 134 and the housing 131, the stroke of the handle 34 is limited by the stroke limiting portion 201, so that the handle 134 is limited from being fired, and at this time, the locking member is in a locked state, the first protrusion 204 on the locking member forms an interference fit with the through hole 104, and the locking member 200 does not slide back under the action of friction force. As shown in fig. 1, when the first protrusion 204 and the second protrusion 205 are respectively located at two sides of the through hole 104, the stroke limiting portion 201 is no longer located between the handle 134 and the housing 131, and does not obstruct the stroke of the handle 134, and is in the non-locking state, the first elastic buckle 202 and the second elastic buckle 203 clamp the handle 134, so as to prevent the entire locking member 200 from falling off from the handle, preferably, the distance between the first protrusion and the second protrusion is equal to the length of the through hole, and the first protrusion and the second protrusion are respectively located at two opposite sides of the locking member, so that the locking member 200 does not shake in the through hole.
The embodiment can be further modified as follows: one side of the first protrusion facing the second protrusion is a plane, an included angle between the plane and the axis of the through hole is smaller than or equal to 90 degrees, and one side of the first protrusion facing away from the second protrusion is an outward convex arc; one side of the second protrusion facing the first protrusion is also a plane, an included angle between the plane and the axis of the through hole is smaller than or equal to 90 degrees, and one side of the second protrusion facing away from the first protrusion is in a convex arc shape.
Preferably, in this embodiment, the width of the main body of the first elastic buckle and the width of the main body of the second elastic buckle are 4.2mm, and the width of the square through hole in the handle is 4.0mm, so that the locking piece and the handle are in interference fit; the length of the square through hole of the handle is 7.5mm, the length of the second elastic buckle is 7.5mm, and the working length is 7.5 mm. Under the unlocked state, owing to have 0.2 mm's magnitude of interference, there is not the effect of external force, the head end of second elasticity buckle plays the effect that the card hinders, and the back-off of first elasticity buckle can block the other end of handle square through hole simultaneously, consequently under the unlocked state, the position of locking piece is fixed, the condition of random disorder can not appear. When semi-automatic biopsy needle needs the locking, promote the locking piece and remove, second elasticity buckle is under pressure this moment, and the shell fragment takes place to warp, can be very light push the locking piece in the square through hole, because the existence of elastic restoring force, in whole 7.5 mm's stroke, have certain frictional resistance, when the locking was accomplished, the locking piece also can not slide to the return. The length of the square through hole of the handle is 7.5mm, the length of the elastic buckle 2 is 7.5mm, the reverse buckle of the elastic buckle 2 cannot exceed the other side of the square through hole of the handle, if the reverse buckle acts, the safety locking device cannot be pulled back, the semi-automatic biopsy needle is always in a locking state, and the biopsy needle cannot be fired.
The present invention is not limited to the specific technical solutions described in the above embodiments, and other embodiments may be made in the present invention in addition to the above embodiments. It will be understood by those skilled in the art that various changes, substitutions of equivalents, and alterations can be made without departing from the spirit and scope of the invention.
Claims (6)
1. A safety locking device of a semi-automatic biopsy needle comprises a shell, an outer needle seat positioned in the shell and a handle used for loading or firing the biopsy needle, wherein the handle comprises a handheld section, a transition section and a connecting section which are sequentially connected together, and the connecting section of the handle is inserted into the shell and then connected with the outer needle seat; the method is characterized in that:
a through hole is formed in the transition section of the handle, and an included angle of a preset angle is formed between the axis of the through hole and the length direction of the handle; a locking piece capable of sliding back and forth along the axis direction of the through hole is arranged in the through hole, one end of the locking piece is bent towards the direction of the connecting section of the handle to form a stroke limiting part, the stroke limiting part extends out of the transition section and then extends for a preset length towards the connecting section, and the locking piece is matched with the through hole in size;
the locking piece is provided with two elastic buckles matched with the through hole, wherein the elastic buckle close to the stroke limiting part is called a first elastic buckle, and the elastic buckle far away from the stroke limiting part is called a second elastic buckle; the head of the first elastic buckle is provided with a first protrusion facing the inner wall of the through hole, the head of the second elastic buckle is provided with a second protrusion facing the inner wall of the through hole, and the distance between the first protrusion and the second protrusion is not less than the length of the through hole; the distance between the stroke limiting part and the first protrusion is not greater than the length of the through hole.
2. The safety lockout device for a semi-automatic biopsy needle of claim 1, wherein: the distance between the first protrusion and the second protrusion is equal to the length of the through hole.
3. The safety lockout device for a semi-automatic biopsy needle of claim 1, wherein: the first protrusion and the second protrusion are located on opposite sides of the locking member, respectively.
4. A safety locking device for a semi-automatic biopsy needle according to any of claims 1-3, characterized in that: one side of the first protrusion facing the second protrusion is a plane, an included angle between the plane and the axis of the through hole is smaller than or equal to 90 degrees, and one side of the first protrusion facing away from the second protrusion is an outward convex arc; one side of the second protrusion facing the first protrusion is also a plane, an included angle between the plane and the axis of the through hole is smaller than or equal to 90 degrees, and one side of the second protrusion facing away from the first protrusion is in a convex arc shape.
5. A safety locking device for a semi-automatic biopsy needle according to any of claims 1-3, characterized in that: the cross section of the through hole is polygonal.
6. A safety locking device for a semi-automatic biopsy needle according to any of claims 1-3, characterized in that: the cross section of the through hole is semicircular or fan-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692331.6A CN113303839A (en) | 2021-06-22 | 2021-06-22 | Safety locking device of semi-automatic biopsy needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692331.6A CN113303839A (en) | 2021-06-22 | 2021-06-22 | Safety locking device of semi-automatic biopsy needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113303839A true CN113303839A (en) | 2021-08-27 |
Family
ID=77379906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110692331.6A Pending CN113303839A (en) | 2021-06-22 | 2021-06-22 | Safety locking device of semi-automatic biopsy needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113303839A (en) |
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2021
- 2021-06-22 CN CN202110692331.6A patent/CN113303839A/en active Pending
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