KR20200102039A - A biopsy syringe having a rotating needle - Google Patents

Abstract

The present invention provides a technology including a new structure of a needle and a cutting force transmission structure that enables a precise cutting force to be efficiently applied to a needle while minimizing a hand movement required to move a plunger in order to apply negative pressure to the plunger of a syringe. To this end, according to an embodiment of the present invention, a syringe for a biopsy including a rotating needle comprises: a needle configured to be able to rotate, having a suction hole formed at least on a side surface, having a cutting blade formed on a side surface facing a rotation direction among side surfaces in a longitudinal direction of the suction hole, and configured to suck a specimen cut according to rotation of the cutting blade through a hollow portion according to negative pressure; a cylinder having a hollow portion to suck collected tissues from the suction hole and store the same, formed to extend in the longitudinal direction, and having a guide groove formed on an area in the longitudinal direction; a plunger accommodated in the hollow portion of the cylinder and formed to be able to move in the longitudinal direction; a rack gear portion coupled to an end side opposite to a side facing the suction hole among both end sides of the plunger to be fixed to the plunger, formed to extend while being spaced apart from a central axis column of the plunger in the longitudinal direction, and provided on an outer surface of the cylinder; a plunger control unit for moving the plunger in the longitudinal direction by applying power in the longitudinal direction to the rack gear portion, by being fitted into and installed in the guide groove of the cylinder and moving in the longitudinal direction; and a power transmission device for converting movement in the longitudinal direction of the plunger control unit into rotation so as to rotate the needle.

Description

Biopsy syringe containing a rotating needle {A BIOPSY SYRINGE HAVING A ROTATING NEEDLE}

The present invention relates to a syringe used for a biopsy used as a specimen device for biological tissue, and more particularly, a biological tissue through a needle that can be rotated while a cutting edge for accurately cutting the biological tissue is formed on the existing side. Can be cut very finely. In order to apply negative pressure to the plunger of the syringe, the hand movement required to move the plunger can be minimized, while the rotational force can be efficiently applied to the needle, increasing the collection yield and ensuring safety in tissue collection that requires precise and precise manipulation. Related to the biopsy syringe.

In general, for the examination of living tissue, a method of injecting a device capable of collecting living tissue into the living tissue and collecting a tissue to be examined from among the living tissue is used. In the case of fine needle aspiration biopsy, a general syringe is used.

However, a general injection needle is formed on the outer end of the plunger for general purposes such as injecting drugs or inhaling body fluids, and the operator holds the plunger and then moves the plunger back and forth. Accordingly, since the operator must grip the cylinder connected with the needle and insert it into the human body, release the grip and perform suction while holding the outer end of the plunger, targeting to the target is disturbed, resulting in inaccurate and low sample collection rates. . In addition, when performing a biopsy, since simple suction is performed, there is a problem in that the biological tissue sucked for examination is destroyed by the blade formed on the needle tip or the corresponding tissue cannot be accurately aspirated.

Accordingly, technologies such as Korean Patent No. 10-1143929 are being developed to improve the suction operation method of the existing syringe. The above-described conventional technology proposes a structure in which a plunger operation guide bar is formed to extend to a moving plate formed on the outer end of the plunger, and the plunger is moved backward using a thumb at the suction hole side.

However, even with this structure, in order to move the plunger, the gripping state must be released so that the plunger operation guide bar is gripped with the thumb while the cylinder is gripped, and when the moving distance of the plunger increases, the gripping is inevitably released. In the end, as in the existing technology, targeting to the target is disturbed and a low sample collection rate is pointed out.

In addition, there is a problem in that the blade is eventually formed on the needle tip, so that when the biological tissue is sucked, the biological tissue that is sucked is destroyed by the blade formed on the needle tip, or the problem that the corresponding tissue cannot be accurately sucked is not solved.

Therefore, the present invention can be very precisely cut without destroying living tissue. In order to apply negative pressure to the plunger of the syringe, the hand movement required to move the plunger can be minimized, while at the same time, a new structure of the needle and a cutting force transmission structure that allows the cutting force to be efficiently applied to the needle are included, requiring precise and precise operation. Its purpose is to increase the harvesting yield and provide a technology with secured safety in collecting tissues.

In order to achieve the above object, a biopsy syringe including a rotary needle according to an embodiment of the present invention is configured to be rotatable, has a suction hole formed on at least a side thereof, and a longitudinal side surface of the suction hole A needle having a cutting edge formed on a side opposite to the rotational direction of the needle and configured to suck a sample cut according to the rotation of the cutting edge through the hollow portion according to the pressure of the cutting edge; A cylinder having a hollow portion for suctioning and storing the collected tissue from the suction hole and extending along the longitudinal direction, and having a guide groove formed in one region in the longitudinal direction; A plunger accommodated in the hollow portion of the cylinder and formed to be movable along the longitudinal direction; A rack gear unit provided on the outer surface of the cylinder is coupled to the plunger so as to be fixed to the end of the plunger at the opposite end to the side facing the suction hole, and is formed to extend while being spaced apart from the central axis column of the plunger in the longitudinal direction ; A plunger operation unit fitted in the guide groove of the cylinder and moved in the longitudinal direction to move the plunger in the longitudinal direction by applying a longitudinal force to the rack gear; And a power transmission device for rotating the needle by converting the longitudinal movement of the plunger operation unit into a rotational movement.

The power transmission device, a member having a circular front end surface, the needle and a needle head fixing the needle is fixedly installed on one end side, a ring gear portion formed with a ring gear on the other end side; And a slider crank system formed on an end side of the needle side of the plunger operation unit and at least having a driving pinion formed on the crank, wherein the driving pinion is engaged with the ring gear unit to move the plunger operation unit in the longitudinal direction. A power conversion unit provided to rotate the ring gear unit by a crank rotated according to the; Including, the biopsy syringe including the rotary needle, the ring gear unit and the cylinder between the ring gear unit and the cylinder And a needle cap having a first penetration part formed to fix the ring gear part so as to be rotatable about a central axis and connect the ring gear part and the driving pinion in one area; further comprising, a needle of the guide groove of the cylinder On the side short side, a second through portion penetrating to correspond to the first through portion is formed, and a bevel formed when the ring gear portion and the driving pinion are connected through the first through portion and the second through portion. It is preferable that the gear system and the slider crank system are configured to impart a rotational force to the needle according to the longitudinal movement of the plunger.

The slider crank system includes: a coupler having one end hingedly coupled to a hinge formed on the needle side end of the plunger operation unit, and the other end hingedly coupled to a region on the outer circumferential side of the crank; Including, by a hinge movement between the crank and the plunger operation unit when the plunger operation unit moves in the longitudinal direction, when the plunger operation unit slides in a unit length, the coupler rotates in a unit angular range while the crank is rotated. It is preferable to be driven to rotate by a unit rotation angle.

The plunger operation unit is formed to extend in the longitudinal direction from the finger locking portion and the finger locking portion, and a plurality of teeth engaging the teeth of the rack gear portion are formed on a surface of one surface that contacts the teeth of the rack gear portion. , And a sliding body formed so that the plurality of teeth are engaged with the teeth of the rack gear unit while being inserted into the plunger through the guide groove, at least one of the teeth of the rack gear unit and the teeth of the plunger operation unit, each tooth Of the inclined portions on both sides of the top of the cylinder, the inclined portion formed on the side to which the needle is connected among the short sides of the cylinder, and the inclined portion of the other end having a different inclination with the axis parallel to the longitudinal direction, is formed It is formed to be gentler than the inclination, and when a force in the direction of forming a negative pressure among the force in the longitudinal direction is applied through the finger locking part, the plunger is moved by applying a force to the teeth of the rack gear part by the locking of the teeth. , When a force in a direction opposite to the force for moving the plunger is applied, it is preferable that the rack gear unit is configured to move the sliding body without moving the plunger while sliding between the teeth of the rack gear unit and the plurality of teeth. .

The plunger has the same cross-section of the plunger and a cross-sectional shape of the hollow portion of the cylinder, but the width of the cross-section of the hollow portion of the cylinder is larger than that of the cross-section of the plunger, and the plunger is centered on the central axis column. It is preferable that it is configured to be able to rotate in the hollow portion of the cylinder.

It is preferable that the guide groove has an accommodation space for guiding the plunger to be independently moved in the longitudinal direction by releasing the coupling of the rack gear unit and the plunger operation unit when the plunger is rotated.

It is preferable that the needle is formed so that the suction hole is inclined with a longitudinal axis along the outer surface of the needle.

According to the present invention, the operation of pulling the plunger operation unit rearward after the user grips the plunger while the finger is inserted into the finger locking part of the plunger operation unit by performing the functions of the finger locking unit and the rack gear unit of the plunger operation unit. The plunger can be manipulated while maintaining its grip.

In addition, at this time, through the operation of the power transmission means, when the plunger operation unit is pulled in the longitudinal direction, specifically rearward, through the function of the slider crank system and the bevel gear system, a needle having a suction hole and a cutting edge formed on the side is removed. While rotating, negative pressure is applied.

In this case, when suction through the conventional needle tip, the phenomenon that the biological tissue is damaged by suction can be completely prevented through precise cutting by rotating the side cutting edge and providing negative pressure.

In addition, it is possible to move the plunger backwards to provide negative pressure while maintaining the gripping state by the user, and because it enables the rotation of the above-described needle at the same time through the backward movement, the plunger maintains the gripping state as it is. There is an effect of providing a negative pressure for and enabling precise cutting by rotating the needle.

Through this, the hand movement required to move the plunger can be minimized, and the cutting force can be efficiently applied to the needle, thereby increasing the collection yield and securing safety in tissue collection that requires precise and precise manipulation. .

1 is a combined perspective view of a biopsy syringe including a rotary needle according to an embodiment of the present invention.
2 and 3 are a perspective view and a cross-sectional perspective view for explaining the features of the configuration of the needle according to an embodiment of the present invention.
4 is an exploded perspective view of some configurations for explaining each configuration of a biopsy syringe including a rotary needle according to an embodiment of the present invention.
5 is a view for explaining the structure of a cylinder end side according to an embodiment of the present invention.
6 is a view for explaining the structure of a rack gear unit according to an embodiment of the present invention.
7 is a view for explaining the coupling structure of the rack gear unit and the plunger according to an embodiment of the present invention.
8 to 10 are views for explaining the structure of a power transmission means according to an embodiment of the present invention.

In the following, various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, a number of specific details are disclosed to aid in an overall understanding of one or more aspects. However, it will also be appreciated by those of ordinary skill in the art that this aspect(s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of one or more aspects. However, these aspects are exemplary and some of the various methods in the principles of the various aspects may be used, and the descriptions described are intended to include all such aspects and their equivalents.

As used herein, "an embodiment", "example", "aspect", "example", etc. may not be construed as having any aspect or design described as being better or advantageous than other aspects or designs. .

In addition, the terms "comprising" and/or "comprising" mean that the corresponding feature and/or element is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. It should be understood as not.

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are those commonly understood by those of ordinary skill in the art to which the present invention belongs. It has the same meaning. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning Is not interpreted as.

Meanwhile, in the following description, some of the components are omitted or excessively enlarged or reduced in order to describe the functions of each component of the present invention, but the corresponding figures are the technical features and rights of the present invention. It will be understood that it is not intended to limit the scope.

In addition, in the following description, a plurality of drawings will be simultaneously referred to and described to describe one technical feature or constituent elements constituting the invention.

1 is a combined perspective view of a biopsy syringe including a rotary needle according to an embodiment of the present invention, Figures 2 and 3 are perspective and cross-sectional perspective views for explaining the features of the configuration of the needle according to an embodiment of the present invention 4 is an exploded perspective view of some configurations for explaining each configuration of a biopsy syringe including a rotary needle according to an embodiment of the present invention, Figure 5 is a structure of a cylinder end side according to an embodiment of the present invention Drawings for explanation. 6 is a view for explaining the structure of the rack gear unit according to an embodiment of the present invention, Figure 7 is a view for explaining the coupling structure of the rack gear unit and the plunger according to an embodiment of the present invention, Figures 8 to 10 Is a view for explaining the structure of the power transmission means according to an embodiment of the present invention.

Referring to the above-described drawings together, a biopsy syringe including a rotary needle according to an embodiment of the present invention is largely composed of a cylinder 20, a plunger 70, and a needle 10 side. At this time, the needle 10 is connected to the cylinder 20 in a sealed state through a needle head 16 and a needle cap 50 coupled to the needle 10 on the needle tip side and the other end side. Since the above-described connection structure between the needle 10 and the cylinder 20 is the same as or similar to a general syringe, a description thereof will be omitted. Meanwhile, a screw wire may be formed on the inner surface of the needle cap 50 so as to be screwed with a screw wire formed on the outer surface of the cylinder 20.

The cylinder 20 is formed with a hollow part 21 for storing and sucking the operation to be collected from the hole of the needle 10 as described above, and as shown in the drawings, in the longitudinal direction (dashed-dotted line direction in FIG. 4) Doedoe formed to extend along the, characterized in that the guide groove 23 is formed in the longitudinal direction in one region as shown in FIG.

The plunger 70 is accommodated in the hollow portion of the cylinder 20 and is installed so as to be able to move back and forth along the longitudinal direction. In particular, in the plunger 70, a rubber packing (not shown) is coupled to the end face of the needle 10 and accommodated in the hollow portion of the cylinder 20, so that the plunger 70 and the hollow portion 21 of the cylinder 20 are It is configured so that the plunger 70 is accommodated in the hollow portion of the cylinder 20 and can be moved while being sealed and blocking the movement of air.

Specifically, referring to FIG. 4 and the like, the plunger 70 is formed in the longitudinal direction along a central axis (dashed-dotted line) forming the center of the plunger 70. At this time, as will be described later, there is a protruding area except for the space in which the rack gear portion 71 is formed, and accordingly, the cross section of the plunger 70 has a clover shape as shown in FIGS. 4 and 6.

At this time, as shown in FIG. 6 and the like, the hollow part 21 of the cylinder 20 is also configured in a clover shape, and as described above, the space formed between the plunger 70 and the hollow part 21 is at the side of the needle 10 Since it must be sealed except for the part connected to the plunger 70, a rubber packing 60 may be installed as shown in FIG. 4 on the short side of the needle side, and the shape of the rubber packing 60 is also shown in FIG. As shown, it may be configured to match the shape of the hollow part 21. In FIG. 4, it is shown that the rubber packing 60 exists outside the cylinder 20 and its size is also shown exaggeratedly, but as described above, the rubber packing 60 is coupled to the plunger 70 and thus the cylinder ( The size and installation position may be set so as to be closely accommodated in the hollow part 21 of 20).

Accordingly, when the plunger 70 is moved from the cylinder 20 toward the needle 10 side, the volume of the hollow portion decreases to generate positive pressure, so that the fluid stored in the hollow portion is carried out through the needle 10, When moving to the opposite side of the needle 10 in the longitudinal direction and in the rear part, the volume of the hollow part 21 increases and a sound pressure is generated, so that an external sample is transferred to the hollow part 21 through the needle 10, preferably. In other words, the sample sucked through the needle 10 is sucked into the cylinder 20.

Meanwhile, a cylinder handle (no identification number) is formed on the cylinder 20 so that the operator grips the plunger head (no identification number) and the cylinder handle to be described later, and directly moves the plunger 70 when necessary.

The plunger 70 is accommodated in the hollow portion of the cylinder 20 as described above, and is formed and installed to be movable along the longitudinal direction. As shown in FIG. 4, the plunger 70 has a rubber packing 60 coupled thereto, and a space in which the rack gear unit 71 is installed is formed, as will be described later and as shown in FIG. 6. On the outer end side of the plunger 70, that is, on the side opposite to the side facing the needle 10, a plunger head capable of holding the plunger 70 so that the operator can directly move the plunger 70 is formed as shown in FIG. Can be.

The operator may hold the plunger head and rotate the plunger 70 based on the central axis in order to perform a function to be described later. To this end, the cross-section of the plunger 70 and the cross-section of the hollow part 21 of the cylinder 20 are the same, but the width of the cross-section corresponding to the protruding member of the hollow part 21 of the cylinder 20 is a protruding member It is configured to be larger than the width of the cross section of the, as shown in FIG. 7 around the central axis column, the plunger 70 may be configured to be able to rotate in the hollow portion 21 of the cylinder 20.

Specifically, the thickness toward both sides from the center of the fan shape of the cross section corresponding to the protruding member of the plunger 70 of the hollow part 21 of the cylinder 20 may be configured to be at least larger than the width of the cross-section of the protruding member. have. In addition, since the hollow portion 21 is closed at the end of the needle 10 side, the depth at which the plunger 70 moves toward the needle 10 along the length direction may be limited.

Meanwhile, referring to the above drawings, specifically FIGS. 2 and 3, the needle 10 has a suction hole 13 formed on at least a side thereof, and a side opposite to the rotational direction among the longitudinal side surfaces of the suction hole 13 The cutting edge 14 is formed in the cutting edge 14, and according to the rotation of the cutting edge 14, the specimen located near the needle tip 11 is precisely cut without damage to the specimen, and the cut specimen is cut in a hollow part according to the pressure. It is configured to suck through the hollow portion inside the cylindrical needle body 12.

At this time, as shown in (a) of FIG. 2, the suction hole 13 and the cutting edge 14 on the side of the needle 10 may be formed parallel to the central axis in the longitudinal direction. In this case, there is an advantage in that the needle 10 can be easily manufactured and the specimen can be cut relatively elaborately.

However, in another embodiment of the present invention, as shown in FIG. 2B, the suction hole 13-1 and the cutting edge 14-1 on the side of the needle 10-1 are the needle 10-1. ) Is formed to be inclined with a longitudinal axis along the outer surface, and may be formed to have a screw shape when viewed from the outside.

Referring to Figures 3 (a) and (b), which are detailed drawings of Figure 2 (b), the suction hole 13-1 and the cutting edge 14-1 of the needle 10-1 are In the case of forming an inclination with the longitudinal axis along the outer surface of (10-1), the hollow portion 15 on the hole side may have a cross section formed along the length direction such as 15-1, 15-2, 15-3, etc. connect. That is, as shown in (b) of FIG. 3, the hollow portion 15 on the hole side of the suction hole 13-1 along the length direction is gradually thinner in its cross-section on the opposite side of the suction hole 13-1. Can be configured to

When configured in this way, while the specimen is cut by the screw-shaped cutting edge 14-1, according to the shape of the hollow portion 15 such as each of the above-described cross-sections (15-1, 15-2, 15-3) At the same time as negative pressure is generated, the end faces (15-1, 15-2, 15-3) are gradually widened, and the suction hole (13-1) and the cutting edge (14-1) close the outer surface of the needle (10-1). Therefore, as it is formed in an inclination with the longitudinal axis, the suction area of the hollow part of the needle 10-1 itself has a screw-like shape, and the biopsy tissue, that is, the specimen is gently sucked without damage along the smooth curved slope of the inner surface. There are additional effects that can be entered.

On the other hand, the cylinder 20 is formed to extend along the length direction and has a hollow portion 21 for storing and sucking the tissue to be collected from the suction hole 13 as described above, but the guide groove ( 23) is characterized in that it is formed.

At this time, the guide groove 23 is configured such that the plunger 70 is rotatable in the hollow portion 21 of the cylinder 20 as described above, and thus the rack gear portion 71 when the plunger 70 is rotated as described later. An accommodation space that guides the plunger 70 to independently move in the longitudinal direction by releasing the coupling of the plunger operation unit 30 (a space formed along the length direction in a fan shape of the guide groove 23 in FIG. 6) Semi-, it may be formed to have an area other than the area in which the sliding body 32 of the plunger operation unit 30 is accommodated).

In the embodiment of the present invention, the plunger 70 is accommodated in the hollow portion 21 of the cylinder 20 as described above and refers to a configuration installed to be movable inside the cylinder 20 along the above-described longitudinal direction. In the above and later descriptions, the longitudinal direction is a direction formed by the dashed-dotted line of FIG. 4, and will be understood as a concept including a direction toward the needle 10 and a direction opposite to the direction. The longitudinal direction will be understood as a direction opposite to the above-described direction in the case of forming an eupam, and a direction toward the needle 10 side in the case of forming a positive pressure according to the part explaining the function performance of the present invention.

The rack gear portion 71 is coupled to be fixed to the plunger 70 on the suction hole 13 of the both ends of the plunger 70, that is, the side facing the needle 10 and the opposite end side, as shown in FIG. It is formed to extend while spaced apart from the central axis of the plunger 70 in the longitudinal direction and provided on the outer surface of the cylinder 20. As shown in Figure 6, the rack gear portion 71 is configured to be fixed to the plunger 70 at one end, specifically to the plunger head side as described above, and the other is configured not to be fixed to the plunger 70 As a member of, it can be seen that the bar-shaped body is supported by the outer surface of the guide groove 23 side of the cylinder 20, referring to FIG. 6.

The plunger operation unit 30 is fitted in the guide groove 23 of the cylinder 20 and moved in the longitudinal direction, thereby applying a longitudinal force to the rack gear unit 71 to move the plunger 70 in the longitudinal direction. Functions. That is, the plunger operation unit 30 performs a function of transmitting an external force to the plunger 70 through the rack gear unit 71.

As described above, the plunger operation unit 30 is fitted in the guide groove 23 of the cylinder 20. To this end, the guide groove 23 has a configuration such as a separate groove in which the plunger operation unit 30 can be inserted in the shape of the outer sectional surface, and the cross-sectional shape of the plunger operation unit 30 is fitted into the separate groove described above. A configuration such as a separate protrusion to allow it to be formed may be formed.

Meanwhile, as described above, the user may hold the plunger head and rotate the plunger 70 based on the central axis. At this time, the guide groove 23 is configured such that the plunger 70 is rotatable in the hollow portion 21 of the cylinder 20 as described above, and thus the rack gear portion 71 when the plunger 70 is rotated as described later. An accommodation space that guides the plunger 70 to independently move in the longitudinal direction by releasing the coupling of the plunger operation unit 30 (a space formed along the length direction in a fan shape of the guide groove 23 in FIG. 6) Semi-, it may be formed to have an area other than the area in which the sliding body 32 of the plunger operation unit 30 is accommodated).

That is, referring to FIGS. 4, 6 and 7 (a) and (b), in the state of FIG. 7 (b), the teeth 33 are engaged with the rack gear unit 71, and the plunger operation unit 30 ) And the plunger 70 are combined to enable power transmission, and in the state (a) of FIG. 7, the plunger is rotated, thereby releasing the coupling between the rack gear unit 71 and the plunger operation unit 30 to release the plunger ( 70) can be independently moved in the longitudinal direction.

Through this, when the sample is present in the hollow part 21 of the cylinder 20 and performs an action such as taking the sample out of the cylinder 20, the plunger operation unit 30 moves together according to the movement of the plunger 70. It can be prevented from being moved.

On the other hand, the plunger 70 is moved in the same direction as the moving direction of the plunger operation unit 30 by cutting the moving force through the rack gear portion 71 according to the movement of the plunger operation unit 30 as described above. However, when a sample is sucked through the plunger operation unit 30, the movement of the user's finger is limited. In this case, the plunger operation unit 30 is moved rearward in a certain direction, and then the plunger operation unit 30 is again You should be able to apply sound pressure while moving forward and back.

That is, in order to perform the function of the present invention, when the plunger operation unit 30 moves backward, that is, in the longitudinal direction and applies negative pressure, the plunger 70 must be moved together through the coupling with the rack gear unit 71, In order to move the plunger operation unit 30 forward, that is, to the original position for convenience of finger movement, the plunger is prevented from applying positive pressure, that is, the coupling with the rack gear unit 71 is released. (70) should not be moved.

To this end, the plunger operation unit 30 may be configured to include technical features as shown in FIGS. 6 and 8. That is, as shown in Figure 6, the plunger operation unit 30 is formed extending in the longitudinal direction from the finger locking portion 31, the finger locking portion 31, one of the teeth of the rack gear 71 A plurality of teeth 33 are formed on the contact surface to be caught by the teeth of the rack gear unit 70, and are inserted into the plunger 70 through the guide groove 23, It may be configured to include a sliding body 32 formed to engage the teeth 33.

At this time, in order to include the above-described technical features, at least one of the teeth of the rack gear unit 17 and the teeth 33 of the plunger operation unit 30, preferably both configurations, is the highest point of each tooth. As a reference, among the inclined portions on both sides, the inclined portion 34 formed on the side to which the needle 10 is connected among the short sides of the cylinder 20, and the inclined portion 35 on the other end having a different inclination with an axis parallel to the length direction It is formed to be gentler than the inclination made with the axis parallel to the length direction.

Through this, in the present invention, when a force in a direction (rear) of the force in the longitudinal direction, specifically in the longitudinal direction, is applied through the finger locking unit 31, the rack gear unit ( 71) to move the plunger 70 in the same direction by applying a force in the corresponding direction to the teeth of 71), and in the direction opposite to the force that moves the plunger 70, that is, the direction of forming a positive pressure among the aforementioned longitudinal forces (forward) When the force of the rack gear portion 71 and the plurality of teeth 33, the engagement between the teeth of the rack gear portion 71 and the plurality of teeth (33) slides and moves only the sliding body 32 without moving the plunger 70, the plunger operation unit 31 ) May be configured to return to its original state only through the movement of the finger locking unit 31 without the need for a separate rotation.

Through this, when the user's finger caught in the finger locking part 31 is sucked, when the plunger 70 is moved backward by a certain distance according to the structure of the finger, the plunger 70 is moved to apply negative pressure, and then move forward to the original position. When the plunger operation unit 30 is moved, the plunger 70 does not move so that the position of the plunger 70 is maintained without applying positive pressure, so that the specimen is effectively transferred to the cylinder 20 while repeating the act of scratching the finger. It can be sucked inside.

Meanwhile, the power transmission device performs a function of rotating the needle 10 by converting the movement in the longitudinal direction of the plunger operation unit 30 into rotation movement.

At this time, as described above, the plunger operation unit 30 is moved back and forth according to the movement of the user's finger caught in the finger locking part 31. In the power transmission device of the present invention, the needle 10 should be rotated in one direction by converting the forward and backward movement of the plunger operation unit 30 into rotation movement in one direction.

To this end, the power transmission device is a member having a circular front cross-section as shown in FIGS. 4 and 10, and a needle head 16 fixing the needle 10 and the needle 10 is fixedly installed at one end. , The other side surface includes a ring gear portion 40 in which the ring gear 41 is formed. In addition, as shown in Figs. 4 and 8, it is formed on the needle side end side of the plunger operation unit 30, and includes a slider crank system in which a driving pinion 80 is formed at least on the crank 92, and the driving pinion 80 ) Is engaged with the ring gear 41 of the ring gear part 40 to form a bevel gear system, while the ring gear part 40 is rotated according to the movement of the plunger operation unit 30 in the longitudinal direction. ) It is preferable to include a power conversion unit provided to rotate.

At this time, the plunger operation unit 30 may be closed with the ring gear unit 40 by the cylinder 20. To this end, as described above, a first through part 51 may be formed in one region of the needle cap 50 for fixing the needle 10. That is, the needle cap 50 is a general configuration included in the syringe, but in the present invention, in addition to this, the ring gear portion 40 and the cylinder 20 are fixed between the ring gear portion 40 and the cylinder 20, but the ring gear portion 40 ) Is fixed to be rotatable with respect to the central axis, and the first through part 51 is formed to connect the ring gear part 40, specifically the ring gear 41 and the driving pinion 80 in one area. It means included configuration.

In addition, a configuration such that the above-described driving pinion 80 is connected to the ring gear 41 in the cylinder 20 as well as the needle cap 50 will be required. To this end, a second penetrating portion 22 penetrating to correspond to the first penetrating portion 51 is formed on a short side surface of the guide groove 23 of the cylinder 20 on the needle 10 side.

Through this, the plunger by a bevel gear system and a slider crank system formed as the ring gear part 40 and the driving pinion 80 are connected while being connected through the first through part 51 and the second through part 22. It may be configured to impart rotational force to the needle 10 according to the longitudinal movement of 70). In particular, by the above-described bevel gear system and slider crank system, even if the plunger operation unit 30 reciprocates, the driving pinion 80 is constantly rotated in only one direction, so that the needle 10 is also a ring gear unit ( It is fixed to 40) and is interlocked with the one-way motion of the ring gear unit 40 and the driving pinion 80, thereby enabling a one-way rotational motion.

That is, by the above-described structure, when the plunger operation unit 30 is repeatedly moved by performing the above-described function, the needle 10 rotates together in one direction, so from the inside of the cylinder 20 to the suction hole 13 The specimen can be moved while being repeatedly provided by the upper arm, and at the same time, the specimen is highly elaborate by the structure of the suction hole 13 and the cutting edge 14 formed on the side of the needle 10 and the aforementioned rotational motion of the needle 10. Will be cut.

Through this, it is possible to move the plunger 30 rearward for providing sound pressure while maintaining the gripping state by the user, and to enable rotation of the needle 10 described above at the same time through the rear movement, gripping While maintaining the state as it is, there is an effect of providing a negative pressure to the plunger 70 and enabling precise cutting by rotating the needle 10 together.

Through this, it is possible to minimize the hand movement required to move the plunger 70 and at the same time to effectively apply the cutting force to the needle 10, thereby increasing the collection yield and safety in tissue collecting that requires precise and precise operation. This has the effect of being secured.

Among the power conversion units described above, the slider crank system is specifically shown in FIGS. 8 and 9. 8 is an exemplary embodiment of a slider crank system in a biopsy injector of the present invention, and FIG. 9 is an abstract diagram illustrating a configuration functionally in order to explain the function of the system.

8 and 9, the slider crank system has one end hinged to the hinge 300 (H1 hinge point) formed on the needle side end (same as the ring gear side) of the plunger operation unit 30, and the other The short side includes couplers 91 and 910 that are hinged to one area (H2 hinge point) on the outer circumferential side of the cranks 92 and 920.

The cranks 92 and 920 are in the form of a rod, and the central axis of the driving pinion 80 and its rotation axis (H3 hinge point) are the same. That is, the configuration of half of the crank 92 based on the central axis corresponds to the identification number 920 in FIG. 9, and the central axis of the crank 92 corresponds to the H3 hinge point in FIG. 9.

At this time, since the hinge 300 is fixed to the plunger operation unit 30, it will repeatedly slide, and by the state movement of the above-described components as shown in FIG. 9, the identification number 920 is in one direction while drawing a circle. You will have a rotational motion. When such a configuration is applied to FIG. 8, the crank 92 moves in a circular motion, and since the driving pinion 80 is coupled to the crank 92, it rotates together.

Meanwhile, the central axis (corresponding to H3) of the driving pinion 80 and the crank 92, as can be seen with reference to FIG. 5, in which the second through part 22 of the cylinder 20 is shown among the above-described configurations, It is installed so as to be rotatable on the shaft (no identification number) shown in the second through part 22, and the vertical power can be efficiently and stably converted to the rotational force while the vertical movement according to the rotation is restricted.

Through this configuration, when the plunger operation unit 30 moves in the longitudinal direction, the plunger operation unit 30 is hinged with the crank 92 and the plunger operation unit 30 (movement formed by H1, H2, H3). During the unit length sliding movement (A) of ), the coupler 91 is driven to rotate the crank 92 by the unit rotation angle B while rotating in the unit angle range.

Although the embodiments have been described by the limited embodiments and drawings as described above, those of ordinary skill in the art will appreciate that various modifications and variations are possible from the above description. The terms such as "include", "consist of" or "have" described above mean that components without a description to the contrary may be included, so other components are not excluded. It should be construed as more inclusive. In addition, the scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (7)

It is configured to be rotatable, and at least a suction hole is formed on the side surface, and a cutting edge is formed on a side opposite to the rotational direction of the longitudinal side of the suction hole, so that the cut specimen is collected according to the pressure of the cutting edge. A needle configured to suck through the hollow portion;
A cylinder having a hollow portion for suctioning and storing the collected tissue from the suction hole and extending along the longitudinal direction, and having a guide groove formed in one region in the longitudinal direction;
A plunger accommodated in the hollow portion of the cylinder and formed to be movable along the longitudinal direction;
A rack gear unit provided on the outer surface of the cylinder is coupled to the plunger so as to be fixed to the end of the plunger at the opposite end to the side facing the suction hole, and is formed to extend while being spaced apart from the central axis column of the plunger in the longitudinal direction ;
A plunger operation unit fitted in the guide groove of the cylinder and moved in the longitudinal direction to move the plunger in the longitudinal direction by applying a longitudinal force to the rack gear; And
A biopsy syringe comprising a rotary needle comprising; a power transmission device for rotating the needle by converting the longitudinal movement of the plunger operation unit into a rotational movement.
The method of claim 1,
The power transmission device,
A ring gear portion having a circular end surface, a needle head fixedly installed at one end side and a ring gear formed at the other end side; And
A slider crank system formed on an end side of the needle side of the plunger operation unit, and at least a crank with a driving pinion formed thereon, wherein the driving pinion is engaged in engagement with the ring gear unit, and Including; a power conversion unit provided to rotate the ring gear portion by the crank rotated along,
A biopsy syringe comprising the rotary needle,
A needle that fixes the ring gear part and the cylinder between the ring gear part and the cylinder, fixes the ring gear part so as to be rotatable about a central axis, and has a first through part connected to the ring gear part and the driving pinion in one area It further includes a cap;
A second penetrating portion penetrating so as to correspond to the first penetrating portion is formed on the short side of the needle side of the guide groove of the cylinder,
A bevel gear system formed when the ring gear part and the driving pinion are connected while passing through the first through part and the second through part, and the slider crank system apply a rotational force to the needle according to the longitudinal movement of the plunger. Biopsy syringe comprising a rotary needle, characterized in that configured to impart.
The method of claim 2,
The slider crank system,
A coupler having one end hinged to a hinge formed at an end of the needle side of the plunger operation unit, and the other end hinged to a region of the outer circumferential side of the crank; Including,
When the plunger operation unit moves in the longitudinal direction, the crank and the hinge movement with the plunger operation unit cause the + plunger operation unit to slide in the unit length of the plunger operation unit, and the coupler rotates within the unit angular range while rotating the crank at a unit rotation angle. Biopsy syringe comprising a rotary needle, characterized in that driven to rotate by.
The method of claim 4,
The plunger operation unit,
A finger catching part, a plurality of teeth which are formed extending in the longitudinal direction from the finger catching part, are formed on a surface of one surface in contact with the teeth of the rack gear part, and are formed with a plurality of teeth which are caught by the teeth of the rack gear part, through the guide groove It includes a sliding body formed so as to be inserted into the plunger side to engage the plurality of teeth to the teeth of the rack gear portion,
At least one of the teeth of the rack gear unit and the teeth of the plunger operation unit,
Of the inclined portions on both sides based on the highest point of each tooth, the inclined portion formed on the side to which the needle is connected among the short ends of the cylinder, and the inclined portion of the other end having a different inclination with the axis parallel to the longitudinal direction is an axis parallel to the longitudinal direction. It is formed to be gentler than the slope formed by
When a force in the direction of forming a negative pressure among the force in the longitudinal direction is applied through the finger locking part, a force is applied to the teeth of the rack gear part by the engagement of the teeth to move the plunger, and a force for moving the plunger and Biopsy comprising a rotational needle, characterized in that configured to move the sliding body without moving the plunger while sliding the engagement between the teeth of the rack gear unit and the plurality of teeth when a force in the opposite direction is applied Dragon syringe.
The plunger,
The cross-section of the plunger and the cross-sectional shape of the hollow portion of the cylinder are the same, but the width of the cross-section of the hollow portion of the cylinder is larger than the width of the cross-section of the plunger, so that the plunger is Biopsy syringe comprising a rotary needle, characterized in that configured to enable rotation in the hollow portion.
The method of claim 1,
The guide groove is a rotary needle, characterized in that it has an accommodation space for guiding the plunger to be independently moved in the longitudinal direction by releasing the coupling of the rack gear part and the plunger operation unit when the plunger is rotated. Biopsy syringe containing.
The method of claim 1,
The needle,
Biopsy syringe comprising a rotary needle, characterized in that the suction hole is formed to be inclined with a longitudinal axis along the outer surface of the needle.

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