Disposable needle biopsy needle
By using a variable-pitch spring design in the biopsy needle, the volume problem caused by the increase in spring diameter and length in the prior art is solved, which realizes the improvement of firing energy and the reduction of volume, thus improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-04-14
AI Technical Summary
The firing power of existing disposable biopsy needles is mainly provided by springs, which leads to an increase in the diameter and length of the springs, resulting in a larger device size and affecting the user experience.
The design employs a variable-pitch spring, with the spring pitch gradually increasing to improve the striking power, reduce the difficulty of operation, and decrease the size of the device.
It effectively improves firing power, reduces operational difficulty and device size, and enhances user experience.
Smart Images
Figure CN224112704U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of medical devices, specifically to a disposable puncture biopsy needle. Background Technology
[0002] In existing technologies, the firing power of disposable biopsy needles is mainly provided by springs. As a result, in order to ensure that sufficient firing power is provided to the puncture needle, the diameter and length of the springs in existing devices are getting larger and larger, which makes the overall size of the device larger and larger, bringing adverse effects to users. Utility Model Content
[0003] The purpose of this invention is to provide a disposable biopsy needle to solve the problems that exist in existing devices.
[0004] Therefore, embodiments of this utility model propose a disposable biopsy needle.
[0005] According to an embodiment of the present invention, a disposable biopsy needle includes a lower shell, a compression chamber, a puncture mechanism, a button, a firing switch, and an upper shell. The lower shell has a rear end cap at its end. A slide rail is provided on the side of the compression chamber, which is mounted on the lower shell. A clamping mechanism is installed inside the compression chamber, and a variable-pitch spring is connected to the clamping mechanism. The side of the clamping mechanism extends into the slide rail, and the end of the variable-pitch spring extends out of the compression chamber. Starting from the front end of the variable-pitch spring, the pitch of the variable-pitch spring gradually increases. The puncture mechanism is located inside the compression chamber and is connected to the clamping mechanism. The button is located on the compression chamber and is connected to the side of the clamping mechanism. The firing switch is located on the lower shell, and its end is connected to the end of the variable-pitch spring, with the end of the firing switch abutting against the rear end cap. The upper shell is connected to the lower shell and serves to protect the compression chamber, the button, and the firing switch.
[0006] According to the present invention, a disposable biopsy needle is provided in the compression chamber with a variable pitch spring, and the pitch of the variable pitch spring is gradually increased, thereby effectively improving the striking energy of the variable pitch spring.
[0007] In some embodiments, the compression chamber includes an upper chamber and a lower chamber, both of which have semi-circular cross-sections. Sliding grooves are provided on both end faces of the upper and lower chambers, and a corresponding boss is provided on the pressing mechanism. The boss is slidably disposed in the sliding groove.
[0008] In some embodiments, a partition plate is provided at the middle position of the lower chamber to divide the lower chamber into a first chamber and a second chamber; there are two clamping mechanisms, which are respectively disposed in the first chamber and the second chamber; there are two pitch springs, one of which is disposed in the first chamber with its end disposed on the partition plate, and the other of which is disposed in the second chamber with its end connected to the end of the firing switch; there are two buttons, which are respectively disposed on both sides of the compression chamber and are respectively connected to the two clamping mechanisms.
[0009] In some embodiments, the button includes a housing portion and a connecting portion. The housing portion is located at the front end of the compression chamber and is slidably fitted onto the compression chamber. The connecting portion is located on the side of the compression chamber and is connected to the pressing mechanism.
[0010] In some embodiments, the connecting portion of one of the buttons is an elongated plate structure, which is used to connect to the pressing mechanism in the second chamber.
[0011] In some embodiments, the two buttons are labeled "1" and "2" to indicate the winding order of the two buttons.
[0012] In some embodiments, a conduit is provided at the front end of the compression chamber, and the puncture mechanism is inserted through the conduit.
[0013] In some embodiments, the upper housing is provided with an opening, and the front end of the firing switch is disposed within the opening.
[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of a disposable biopsy needle according to an embodiment of the present invention.
[0017] Figure 2 This is a schematic diagram of a compression chamber according to an embodiment of the present invention.
[0018] Figure 3 This is another schematic diagram of the compression cavity according to an embodiment of the present invention.
[0019] Figure 4 This is a schematic diagram of the clamping mechanism and the variable pitch spring according to an embodiment of the present utility model.
[0020] Figure 5 This is a schematic diagram of the pressing mechanism and puncture mechanism according to an embodiment of the present utility model.
[0021] Figure label:
[0022] Disposable biopsy needle 100, lower shell 101, rear end cover 102, upper shell 103, compression chamber 10, slide 11, upper chamber 12, lower chamber 13, slide groove 14, partition plate 15, catheter 16, clamping mechanism 20, variable pitch spring 21, boss 22, puncture mechanism 30, button 40, outer shell 41, connecting part 42, firing switch 50. Detailed Implementation
[0023] The technical solution of this utility model will be clearly and completely described below with reference to specific implementation schemes. However, those skilled in the art should understand that the implementation schemes described below are only for illustrating this utility model and should not be regarded as limiting the scope of this utility model. Based on the implementation schemes in this utility model, all other implementation schemes obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0024] like Figures 1-5 As shown, the disposable biopsy needle 100 according to an embodiment of the present invention includes a lower shell 101, a compression chamber 10, a puncture mechanism 30, a button 40, a firing switch 50, and an upper shell 103.
[0025] The lower shell 101 is provided with a rear end cover 102 at its end, and the compression chamber 10 is provided with a slide 11 on its side. The compression chamber 10 is located on the lower shell 101.
[0026] A clamping mechanism 20 is installed inside the compression chamber 10. A variable pitch spring 21 is connected to the clamping mechanism 20. The side of the clamping mechanism 20 extends into the slide rail 11. The end of the variable pitch spring 21 extends out of the compression chamber 10. Starting from the front end of the variable pitch spring 21, the pitch of the variable pitch spring 21 gradually increases.
[0027] The puncture mechanism 30 is disposed in the compression chamber 10 and is connected to the clamping mechanism 20; the button 40 is disposed on the compression chamber 10 and is connected to the side of the clamping mechanism 20; the firing switch 50 is disposed on the lower shell 101, the end of the firing switch 50 is connected to the end of the pitch spring 21, and the end of the firing switch 50 abuts against the rear end cover 102; the upper shell 103 is connected to the lower shell 101 and is used to protect the compression chamber 10, the button 40 and the firing switch 50.
[0028] It should be noted that the variable pitch spring 21 in this utility model includes at least two forms.
[0029] The first type is: the variable pitch spring 21 can be divided into 3 segments. The first segment is the small pitch segment, the second segment is the pitch-increasing segment, and the third segment is the large pitch segment. When using the first type of spring, since the first segment is the small pitch segment, it solves the problem of the stiff feel in the initial stage of winding. At the same time, the third segment is the large pitch segment, which ensures that sufficient striking power can be provided after winding.
[0030] The second type is: the pitch of the variable pitch spring 21 increases from the front end to the rear end. Since the front end is a small pitch section, it solves the problem of a stiff feel in the initial stage of winding. At the same time, the rear end is a large pitch section, which ensures that it can provide sufficient striking power after winding.
[0031] It is understandable that the variable pitch spring 21 in this utility model reduces the difficulty of operation (the pressure used for winding) while maintaining sufficient kinetic energy (the elastic force remains unchanged relative to the original spring after compression).
[0032] According to the disposable biopsy needle 100 of this utility model, by setting a variable pitch spring 21 in the compression chamber 10 and gradually increasing the pitch of the variable pitch spring 21, the impact energy of the variable pitch spring 21 is effectively improved.
[0033] In some embodiments, the compression chamber 10 includes an upper chamber 12 and a lower chamber 13. The cross-sections of the upper chamber 12 and the lower chamber 13 are both semi-circular. Slide grooves 14 are provided on both end faces of the upper chamber 12 and the lower chamber 13. A boss 22 is correspondingly provided on the pressing mechanism 20. The boss 22 is slidably disposed in the slide groove 14.
[0034] Understandably, the combined design of the groove 14 and the boss 22 effectively improves the stability of the clamping mechanism 20 during the sliding process.
[0035] In some embodiments, a partition plate 15 is provided at the middle position of the lower half chamber 13 to divide the lower half chamber 13 into a first chamber and a second chamber; there are two clamping mechanisms 20, which are respectively disposed in the first chamber and the second chamber; there are two variable pitch springs 21, one of which is disposed in the first chamber and its end is disposed on the partition plate 15, and the other is disposed in the second chamber and its end is connected to the end of the firing switch 50; there are two buttons 40, which are respectively disposed on both sides of the compression chamber 10 and are respectively connected to the two clamping mechanisms 20.
[0036] It is understandable that dividing the lower chamber 13 into a first chamber and a second chamber by the partition plate 15, and installing a clamping mechanism 20 and a variable pitch spring 21 in the first chamber and the second chamber respectively, can apply pressure to the puncture mechanism 30 in stages, which is beneficial to improving the firing power of the disposable puncture biopsy needle 100.
[0037] In some embodiments, the button 40 includes a housing portion 41 and a connecting portion 42. The housing portion 41 is located at the front end of the compression chamber 10 and is slidably sleeved on the compression chamber 10. The connecting portion 42 is located on the side of the compression chamber 10 and is connected to the pressing mechanism 20.
[0038] Understandably, the outer shell 41 can be slidably fitted onto the compression chamber 10, which helps to reduce the overall volume of the disposable biopsy needle 100, facilitates the operation of the disposable biopsy needle 100, and improves the operation accuracy.
[0039] In some embodiments, the connecting portion 42 of a button 40 is an elongated plate structure, which is used to connect to the pressing mechanism 20 in the second chamber.
[0040] In some embodiments, the two buttons 40 are labeled "1" and "2" to indicate the winding order of the two buttons 40.
[0041] In some embodiments, a conduit 16 is provided at the front end of the compression chamber 10, and the puncture mechanism 30 is inserted into the conduit 16.
[0042] In some embodiments, the upper housing 103 is provided with an opening (not shown), and the front end of the trigger switch 50 is disposed in the opening.
[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0047] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A disposable biopsy needle, characterized in that, include: The lower shell has a rear end cover at its end; A compression chamber is provided with a slide rail on its side. The compression chamber is disposed on the lower shell. A clamping mechanism is installed in the compression chamber. A variable pitch spring is connected to the clamping mechanism. The side of the clamping mechanism extends into the slide rail. The end of the variable pitch spring extends out of the compression chamber. Starting from the front end of the variable pitch spring, the pitch of the variable pitch spring gradually increases. A puncture mechanism is disposed within the compression chamber and is connected to the clamping mechanism; A button is provided on the compression chamber and is connected to the side of the pressing mechanism; A trigger switch is disposed on the lower housing, the end of the trigger switch is connected to the end of the variable pitch spring, and the end of the trigger switch abuts against the rear end cover. The upper shell is connected to the lower shell and is used to protect the compression chamber, the button and the firing switch.
2. The disposable biopsy needle according to claim 1, characterized in that, The compression chamber includes an upper chamber and a lower chamber. The cross-sections of the upper chamber and the lower chamber are both semi-circular. Sliding grooves are provided on both end faces of the upper chamber and the lower chamber. A corresponding boss is provided on the pressing mechanism. The boss is slidably disposed in the sliding groove.
3. The disposable biopsy needle according to claim 2, characterized in that, A partition plate is provided in the middle of the lower chamber to divide the lower chamber into a first chamber and a second chamber; There are two clamping mechanisms, which are respectively disposed in the first chamber and the second chamber; There are two variable pitch springs. One variable pitch spring is disposed in the first chamber and its end is disposed on the partition plate. The other variable pitch spring is disposed in the second chamber and its end is connected to the end of the trigger switch. There are two buttons, which are respectively located on both sides of the compression chamber and are respectively connected to the two clamping mechanisms.
4. The disposable biopsy needle according to claim 3, characterized in that, The button includes a housing and a connecting part. The housing is located at the front end of the compression chamber and can be slidably fitted onto the compression chamber. The connecting part is located on the side of the compression chamber and is connected to the pressing mechanism.
5. The disposable biopsy needle according to claim 4, characterized in that, One of the connecting parts of the button is an elongated plate structure, which is used to connect to the pressing mechanism in the second chamber.
6. The disposable biopsy needle according to claim 5, characterized in that, The two buttons are labeled "1" and "2" to indicate the winding order of the two buttons.
7. The disposable biopsy needle according to claim 1, characterized in that, The front end of the compression chamber is provided with a catheter, and the puncture mechanism is inserted into the catheter.
8. The disposable biopsy needle according to claim 1, characterized in that, The upper shell has an opening, and the front end of the firing switch is disposed in the opening.