CN215191820U - Rotary-cut biopsy needle and rotary-cut biopsy system - Google Patents
Rotary-cut biopsy needle and rotary-cut biopsy system Download PDFInfo
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- CN215191820U CN215191820U CN202120515283.9U CN202120515283U CN215191820U CN 215191820 U CN215191820 U CN 215191820U CN 202120515283 U CN202120515283 U CN 202120515283U CN 215191820 U CN215191820 U CN 215191820U
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Abstract
The utility model provides a rotary-cut biopsy needle and a rotary-cut biopsy system, which comprises a rotary-cut knife tube, a knife feeding and retracting tube, a driving device and a transmission device; the driving device comprises a first motor and a second motor, and the transmission device comprises a first gear set and a second gear set; the first motor is directly or indirectly connected with the rotary cutter tube through the first gear set so as to drive the rotary cutter tube to rotate around the axis of the rotary cutter tube; the second motor is directly or indirectly connected with the cutter advancing and retreating tube through the second gear set so as to drive the cutter advancing and retreating tube to move along the direction parallel to the axis of the second motor.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a rotary-cut biopsy needle and rotary-cut biopsy system.
Background
Rotary cutting biopsy needles are devices for sampling pathological tissues commonly used in the market at present, and the devices drive a chain to move through a driving device, so that a rotary knife tube is driven to rotate, and a cutter advancing and retreating tube is driven to advance or retreat.
However, because the maximum fracture bearing capacity of the chain is limited, when tough or calcified tissues are met, the rotary knife tube and the advancing and retreating knife tubes meet high resistance, and at the moment, the chain can be fractured under the continuous output of the motor, so that the equipment is easily damaged; meanwhile, when the chain is loosened, the chain can shake, and then larger noise is generated.
Therefore, the prior art has the problems of easy damage of equipment and high noise.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rotary-cut biopsy needle and rotary-cut biopsy system to solve the easy damage of equipment and the great problem of noise.
According to a first aspect of the present invention, there is provided a rotary-cut biopsy needle, comprising a rotary-cut knife tube, a knife feeding and retracting tube, a driving device and a transmission device; the driving device comprises a first motor and a second motor, and the transmission device comprises a first gear set and a second gear set;
the first motor is directly or indirectly connected with the rotary cutter tube through the first gear set so as to drive the rotary cutter tube to rotate around the axis of the rotary cutter tube;
the second motor is directly or indirectly connected with the cutter advancing and retreating tube through the second gear set so as to drive the cutter advancing and retreating tube to move along the direction parallel to the axis of the second motor.
Optionally, the first gear set includes a first driving wheel, a first driven wheel and a second driven wheel;
the first driving wheel is connected with the first motor, the first driven wheel is meshed with the first driving wheel, the second driven wheel is meshed with the first driven wheel, the rotary cutter pipe is directly or indirectly connected with the second driven wheel so as to rotate along with the second driven wheel, and the rotating axis of the rotary cutter pipe is coincided with the rotating axis of the second driven wheel.
Optionally, the transmission device further includes a rotating shaft, one end of the rotating shaft is connected to the second driven wheel, and a rotating axis of the rotating shaft coincides with a rotating axis of the second driven wheel; the rotary knife pipe is detachably arranged at the other end of the rotary shaft.
Optionally, the second gear set includes a second driving wheel, a third driven wheel and a fourth driven wheel;
the second driving wheel is connected with the second motor, the third driven wheel is meshed with the second driving wheel, the fourth driven wheel is meshed with the third driven wheel, and the cutter advancing and retreating tube is directly or indirectly connected with the fourth driven wheel so as to move along the direction parallel to the axis of the fourth driven wheel under the transmission of the fourth driven wheel.
Optionally, the transmission device further comprises an advancing and retreating shaft and a transmission mechanism;
the transmission mechanism is connected between one end of the advancing and retreating shaft and the fourth driven wheel, so that: the driving and reversing shaft moves along the direction parallel to the axis of the fourth driven wheel under the transmission of the transmission mechanism;
the cutter advancing and retreating tube is detachably connected with the other end of the advancing and retreating shaft so as to move along with the advancing and retreating shaft.
Optionally, the transmission mechanism comprises a lead screw or a rack.
Optionally, the rotary-cut biopsy needle further comprises a first shell and a second shell, and the rotary-cut knife tube and the advancing and retreating knife tube are arranged in the first shell;
the driving device and the transmission device are arranged in the second shell;
the first housing is detachably connected to the second housing.
Optionally, the first housing and the second housing are connected in a snap-fit manner.
Optionally, the first gear set and the second gear set are made of polyoxymethylene or polyetheretherketone.
According to a second aspect of the present invention, there is provided a rotary biopsy system comprising a rotary biopsy needle according to the first aspect of the present invention and its alternatives.
It can be seen that the utility model discloses can utilize first motor and first gear train drive rotary-cut knife pipe rotatory, utilize second motor and second gear train drive advance and retreat knife pipe advance and retreat, because the gear can bear great resistance when the knife pipe meets tough or calcified tissue, consequently can prolong the life of this rotatory biopsy needle, simultaneously, can also reduce the noise in the use.
In the further scheme, the utility model discloses choose for use polyformaldehyde or polyether ether ketone as the material of gear train, can further reduce the noise in the use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a first schematic structural view of a rotary-cut biopsy needle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first gear set according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second gear set according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a rotary-cut biopsy needle according to an embodiment of the present invention.
Description of reference numerals:
11-a first electric machine;
12-a second electric machine;
21-a first gear set;
211-a first capstan;
212-first driven wheel;
213-a second driven wheel;
22-second gear set;
221-a second capstan;
222-a third driven wheel;
223-fourth driven wheel;
23-a rotating shaft;
24-advancing-retreating shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "upper portion", "lower portion", "upper end", "lower surface", "upper surface", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the description of the present invention, "plurality" means a plurality, such as two, three, four, etc., unless specifically limited otherwise.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected" and the like are to be understood broadly, and may for example be fixedly connected, detachably connected, or integrated; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween.
The technical solution of the present invention will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Referring to fig. 1, the rotary biopsy needle includes a rotary cutter tube, a cutter advancing and retreating tube, a driving device and a transmission device; the driving device comprises a first motor 11 and a second motor 12, and the transmission device comprises a first gear set 21 and a second gear set 22;
the first motor 11 is directly or indirectly connected with the rotary cutter tube through the first gear set 21 so as to drive the rotary cutter tube to rotate around the axis of the rotary cutter tube;
the second motor 12 is directly or indirectly connected with the cutter advancing and retreating tube through the second gear set 22 so as to drive the cutter advancing and retreating tube to move along the direction parallel to the axis of the second motor.
The utility model discloses can be applied to in the rotary-cut operation of breast biopsy, wherein, advance and retreat sword pipe is used for stretching into the focus, fixes a position tool bit position, and rotary-cut sword pipe is used for getting off the tissue rotary-cut of focus department to supply follow-up observation, diagnosis.
It can be seen that the utility model discloses can utilize first motor 11 and first gear train 21 drive rotary-cut knife pipe rotatory, utilize second motor 12 and the advance and retreat of second gear train 22 drive advance and retreat knife pipe, because the gear can bear great resistance when the knife pipe meets tough or calcified tissue, consequently can prolong the life of this rotatory biopsy needle, simultaneously, can also reduce the noise in the use.
Further, referring to fig. 1 and fig. 2, the first gear set 21 includes a first driving wheel 211, a first driven wheel 212 and a second driven wheel 213;
the first driving wheel 211 is connected with the first motor 11, the first driven wheel 212 is meshed with the first driving wheel 211, the second driven wheel 213 is meshed with the first driven wheel 212, the rotary cutter tube is directly or indirectly connected with the second driven wheel 213 so as to rotate along with the second driven wheel 213, and the rotating axis of the rotary cutter tube coincides with the rotating axis of the second driven wheel 213.
Further, referring to fig. 1 and fig. 3, the second gear set 22 includes a second driving wheel 221, a third driven wheel 222 and a fourth driven wheel 223;
the second driving wheel 221 is connected with the second motor 12, the third driven wheel 222 is meshed with the second driving wheel 221, the fourth driven wheel 223 is meshed with the third driven wheel 222, and the cutter advancing and retreating tube is directly or indirectly connected with the fourth driven wheel 223 to move along the direction parallel to the axis of the fourth driven wheel 223 under the transmission of the fourth driven wheel 223.
The arrangement of the gears is not limited, and the gear transmission ratio of each gear set (the first gear set 21 and the second gear set 22) can be adjusted according to the rotation speed of the motor (e.g., the first motor 11 and the second motor 12). for one example, referring to fig. 2, the arrangement of the first driving wheel 211, the first driven wheel 212, and the second driven wheel 213 is as shown in the figure, wherein the meshing angle of each gear is in the range of 15 ° to 25 °, for example, the standard pressure angle can be 20 °, the sum of the base circle radii of the first driving wheel 211 and the first driven wheel 212 can be in the range of 7mm to 10mm, for example, 8.55mm, and the sum of the base circle radii of the first driven wheel 212 and the second driven wheel 213 can be in the range of 9mm to 12mm, for example, 10.4 mm.
The following table shows exemplary gear parameters of the first gear set 21:
referring to fig. 3, the second driving pulley 221, the third driven pulley 222 and the fourth driven pulley 223 are arranged as shown in the figure, wherein the meshing angle of each gear is in the range of 15 ° to 25 °, for example, each gear may be at a standard pressure angle of 20 °, the sum of the base circle radii of the second driving pulley 221 and the third driven pulley 222 may be in the range of 7mm to 10mm, for example, 9.43mm, and the sum of the base circle radii of the third driven pulley 222 and the fourth driven pulley may be in the range of 9mm to 12mm, for example, 9.88 mm.
The following table shows gear parameters of an exemplary second gear set 22:
in other examples, the parameters of the gears in the gear set may be other values that satisfy the following equations:
a＝r1+r2＝(ra1+ra2)/cosα；
wherein a represents the sum of the reference circle radii of adjacent gears;
r1 characterizes the pitch circle radius of the first of the adjacent gears;
r2 characterizes the pitch circle radius of the second of the adjacent gears;
alpha represents the meshing angle of adjacent gears;
ra1 characterizes the base radius of the first of the adjacent gears;
ra2 characterizes the base radius of the second of the adjacent gears.
Further, the pitch circle diameter of the gear may be calculated according to the following formula:
d＝m×n；
the diameter of the addendum circle of the gear may be calculated according to the following formula:
D＝(n+2)×m；
wherein d represents the pitch circle diameter of the gear;
m represents the modulus of the gear;
n represents the number of teeth of the gear;
d represents the diameter of the top circle of the gear;
referring to fig. 4, the transmission device further includes a rotating shaft 23, one end of the rotating shaft 23 is connected to the second driven wheel 213, and a rotating axis of the rotating shaft 23 coincides with a rotating axis of the second driven wheel 213; the rotary knife tube is detachably mounted to the other end of the rotary shaft 23.
The transmission device also comprises an advancing and retreating shaft 24 and a transmission mechanism;
the transmission mechanism is connected between one end of the advancing/retreating shaft 24 and the fourth driven wheel 223 so that: the advancing and retreating shaft 24 moves in a direction parallel to the axis of the fourth driven wheel 223 under the transmission of the transmission mechanism;
the cutter advancing and retreating tube is detachably connected to the other end of the advancing and retreating shaft 24 so as to follow the movement of the advancing and retreating shaft 24.
In some embodiments, the transmission mechanism may be a lead screw, and the lead screw is directly or indirectly assembled to the fourth driven wheel 223, in a specific implementation process, the second motor 12 drives the second driving wheel 221 to rotate, the second driving wheel 221 drives the third driven wheel 222 to rotate, the third driven wheel 222 drives the fourth driven wheel 223 to rotate, and the fourth driven wheel 223 drives the lead screw to move, so as to drive the advance and retreat shaft 24 to move along a direction parallel to an axis of the fourth driven wheel 223. In other schemes, the transmission mechanism may also be a rack, and the rack is engaged with the fourth driven wheel 223, in a specific implementation process, the second motor 12 drives the second driving wheel 221 to rotate, the second driving wheel 221 drives the third driven wheel 222 to rotate, the third driven wheel 222 drives the fourth driven wheel 223 to rotate, the fourth driven wheel 223 drives the rack to move, and then the driving and reversing shaft 24 is driven to move along a direction parallel to the axis of the fourth driven wheel 223.
In some embodiments, the rotary cutter tube and the tool feeding and retracting tube may be disposable consumables, and the tool feeding and retracting tube is detachably connected to the feeding and retracting shaft 24, and the rotary cutter tube is detachably connected to the rotating shaft 23, so that the embodiment of the present invention can provide a foundation for replacing disposable consumables (e.g., the rotary cutter tube and the tool feeding and retracting tube).
Furthermore, the rotary-cut biopsy needle also comprises a first shell and a second shell, and the rotary-cut cutter tube and the advancing and retreating cutter tube are arranged in the first shell; the driving device and the transmission device are arranged in the second shell; the first housing is detachably connected to the second housing. For example, the first shell and the second shell can be connected through the clamping groove in a clamping mode, so that when disposable consumables (such as the rotary cutter tube and the cutter advancing and retreating tube) need to be replaced, the first shell is integrally disassembled, the rotary cutter tube and the cutter advancing and retreating tube can be disassembled, and the time for disassembling the consumables is greatly saved and the disassembling step is greatly shortened.
Further, the material of the first gear set 21 and the second gear set 22 is not limited, and may be a polyoxymethylene material (also may be understood as a POM material), or a polyetheretherketone material (also may be understood as a PEEK material). Because polyformaldehyde and polyether-ether-ketone both have good self-lubricity and rigidity, and the friction coefficient is also lower, the service life of the rotary biopsy needle can be effectively prolonged, and the noise in the use process is reduced.
The utility model also provides a rotary-cut biopsy system, including the rotary-cut biopsy needle that above each embodiment relates to.
In the description herein, reference to the terms "an implementation," "an embodiment," "a specific implementation," "an example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A rotary cutting biopsy needle is characterized by comprising a rotary cutting knife tube, a knife advancing and retreating tube, a driving device and a transmission device; the driving device comprises a first motor and a second motor, and the transmission device comprises a first gear set and a second gear set;
the first motor is directly or indirectly connected with the rotary cutter tube through the first gear set so as to drive the rotary cutter tube to rotate around the axis of the rotary cutter tube;
the second motor is directly or indirectly connected with the cutter advancing and retreating tube through the second gear set so as to drive the cutter advancing and retreating tube to move along the direction parallel to the axis of the second motor.
2. The rotational atherectomy biopsy needle of claim 1, wherein the first gear set comprises a first drive pulley, a first driven pulley, and a second driven pulley;
the first driving wheel is connected with the first motor, the first driven wheel is meshed with the first driving wheel, the second driven wheel is meshed with the first driven wheel, the rotary cutter tube is directly or indirectly connected with the second driven wheel so as to rotate along with the second driven wheel, and the rotating axis of the rotary cutter tube is coincided with the rotating axis of the second driven wheel.
3. The rotational atherectomy biopsy needle of claim 2, wherein the transmission further comprises a rotating shaft, one end of the rotating shaft is connected to the second driven wheel, and a rotational axis of the rotating shaft coincides with a rotational axis of the second driven wheel; the rotary cutter tube is detachably mounted at the other end of the rotating shaft.
4. The rotational atherectomy biopsy needle of claim 1, wherein the second gear set comprises a second drive wheel, a third driven wheel, and a fourth driven wheel;
the second driving wheel is connected with the second motor, the third driven wheel is meshed with the second driving wheel, the fourth driven wheel is meshed with the third driven wheel, and the cutter advancing and retreating tube is directly or indirectly connected with the fourth driven wheel so as to move along the direction parallel to the axis of the fourth driven wheel under the transmission of the fourth driven wheel.
5. The rotational atherectomy biopsy needle of claim 4, wherein the transmission further comprises an advancing and retreating shaft and a transmission mechanism;
the transmission mechanism is connected between one end of the advancing and retreating shaft and the fourth driven wheel, so that: the driving and reversing shaft moves along the direction parallel to the axis of the fourth driven wheel under the transmission of the transmission mechanism;
the cutter advancing and retreating tube is detachably connected with the other end of the advancing and retreating shaft so as to move along with the advancing and retreating shaft.
6. The rotational atherectomy biopsy needle of claim 5, wherein the drive mechanism comprises a lead screw or a rack.
7. The rotational atherectomy biopsy needle of any one of claims 1 to 6, further comprising a first housing and a second housing, wherein the rotational shaver tube and the advancing and retracting knife tube are disposed in the first housing;
the driving device and the transmission device are arranged in the second shell;
the first housing is detachably connected to the second housing.
8. The rotational atherectomy biopsy needle of claim 7, wherein the first housing and the second housing are snap-fit together.
9. The rotational atherectomy biopsy needle of any one of claims 1 to 6, wherein the first gear set and the second gear set are made of polyoxymethylene or polyetheretherketone.
10. An atherectomy biopsy system comprising the atherectomy biopsy needle of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120515283.9U CN215191820U (en) | 2021-03-11 | 2021-03-11 | Rotary-cut biopsy needle and rotary-cut biopsy system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120515283.9U CN215191820U (en) | 2021-03-11 | 2021-03-11 | Rotary-cut biopsy needle and rotary-cut biopsy system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215191820U true CN215191820U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120515283.9U Active CN215191820U (en) | 2021-03-11 | 2021-03-11 | Rotary-cut biopsy needle and rotary-cut biopsy system |
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| CN (1) | CN215191820U (en) |
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- 2021-03-11 CN CN202120515283.9U patent/CN215191820U/en active Active
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