A colloid variable injection pipeline switching structure

Abstract

In order to solve the problem of complex needle tube structure existing in the field of medical devices, the present invention discloses a colloid variable injection pipeline switching structure, comprising an injection needle provided with an external thread; a detection needle arranged in the injection needle, an upper end of the detection needle provided with an inverted cone tube, a colloid arranged in the injection needle, the colloid is in an inverted cone shape, a through hole is arranged in the middle of the colloid, the through hole is connected to the inner cavity of the detection needle, the conical surface of the lower end of the colloid is suitable for the inverted cone tube, and the upper end of the colloid abuts the injection needle; a power piece is arranged on the injection needle, the power piece is provided with an internal thread, the internal thread and the external thread cooperate, so that the power piece can drive the colloid to rotate and penetrate into the inverted cone tube, so that the colloid and its through hole shrink, and the upper end of the colloid is away from the inner wall of the injection needle, and an injection chamber is arranged between the power piece and the injection needle.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a colloid variable injection pipeline switching structure. Background Art

[0002] With the increase in the use of dermal fillers, many complications have been reported; the most serious of which is intravascular injection, which may cause skin necrosis, blindness, or stroke. During the process of collecting a blood sample from a vein, our needle tip penetrates the vessel wall and lumen. The human body has natural blood pressure in the veins and arteries. When the needle tip is in the lumen of the blood vessel, blood will flow into the lumen of the needle and fill the lumen due to the blood pressure difference between the lumen and the blood vessel. Therefore, it is possible to observe the blood in the lumen and know whether the needle tip is in the lumen of the blood vessel.

[0003] Existing needle tubes are generally provided with two completely unconnected channels, an injection needle and a detection needle. The injection needle is connected to the syringe, and the detection needle is connected to the detection device. The structure is relatively complicated, and after the blood flows into the inner cavity of the needle, it needs to be pulled out to prevent the dermal filler from being injected into the blood vessel. However, the detection needle is already filled with blood sample, and the needle tube needs to be replaced for re-injection, otherwise it is easy to affect the next test and cannot be reused. Summary of the invention

[0004] The present invention provides a colloid variable injection pipeline switching structure, aiming to solve at least one of the technical problems existing in the prior art.

[0005] The technical solution of the present invention is a colloid variable injection pipeline switching structure, which includes:

[0006] An injection needle having an external thread;

[0007] A detection needle is arranged in the injection needle, and an inverted tapered tube is arranged at the upper end of the detection needle;

[0008] A colloid is arranged in the injection needle, the colloid is in an inverted cone shape, a through hole is arranged in the middle of the colloid, the through hole is connected to the inner cavity of the detection needle, the conical surface of the lower end of the colloid is suitable for the inverted cone tube, and the upper end of the colloid abuts against the injection needle;

[0009] Furthermore, a power piece is provided on the injection needle, and the power piece is provided with an internal thread. The internal thread and the external thread cooperate so that the power piece can drive the colloid to rotate and penetrate into the inverted tapered tube, so that the colloid and its through hole shrink, and the upper end of the colloid is away from the inner wall of the injection needle. An injection chamber is provided between the power piece and the injection needle.

[0010] Furthermore, it also includes a connector, which is arranged on the power component, connected to the injection chamber, and is used to connect the syringe.

[0011] Furthermore, one of the joint and the power member is provided with an annular groove, and the other is provided with an annular block, and the annular groove and the annular block cooperate to enable the joint and the power member to rotate relative to each other.

[0012] Furthermore, the power member is provided with a pressure discharge port, and the pressure discharge port is used to discharge the gas squeezed when the power member drives the colloid.

[0013] Furthermore, a locking member is included, and the locking member is used to relatively fix the power member and the injection needle.

[0014] Furthermore, the power member is provided with a first locking hole, the injection needle is provided with a second locking hole, and the locking member can be inserted into the first locking hole and the second locking hole.

[0015] Furthermore, the power member is provided with a third locking hole, and the locking hole is provided above the first locking hole, and the locking member can be inserted into the second locking hole and the third locking hole at the same time.

[0016] Furthermore, the power member is provided with a connecting rod, and the connecting rod is connected to the colloid.

[0017] Furthermore, a reinforcing rib is provided between the injection needle and the detection needle.

[0018] Furthermore, the power member is provided with a sealing plate, and the sealing plate abuts against the inner wall of the injection needle.

[0019] The beneficial effects of the present invention are as follows.

[0020] 1. During injection, the injection chamber, the through hole and the detection needle are connected. If the needle tip is inserted into the blood vessel cavity, the blood will flow into the inner cavity of the needle due to the blood pressure difference between the chamber and the blood vessel. The blood in the chamber can be observed by observing the chamber to determine whether the needle tip is in the blood vessel. If the blood vessel is not pierced, the power part is driven to make the colloid penetrate into the inverted cone tube, so that the colloid and its through hole shrink, and the upper end of the colloid is away from the inner wall of the injection needle, so that the injection needle tube is connected, the detection needle is disconnected, and the syringe can inject the medicine through the injection needle; when the needle tip is inserted into the blood vessel, after the needle tube is taken out, the connector is connected to the syringe, and physiological saline can be passed to clean the blood in the injection needle, so that the injection needle can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the pipeline switching mechanism according to an embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of the pipeline switching mechanism in the detection state according to an embodiment of the present invention;

[0023] Figure 3It is a schematic diagram of the structure of an injection needle and a detection needle according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the colloid of an embodiment of the present invention;

[0025] Figure 5 It is a schematic cross-sectional structure diagram of the pipeline switching mechanism in the injection state according to an embodiment of the present invention.

[0026] Figure Number:

[0027] Injection needle 100, second locking hole 110, reinforcing rib 120;

[0028] Detection needle 200, inverted tapered tube 210;

[0029] Colloid 300, through hole 310;

[0030] Power member 400, injection chamber 410, connecting rod 420, first locking hole 430, third locking hole 440, sealing plate 450;

[0031] Locking member 500;

[0032] Joint 600 and annular block 610 . DETAILED DESCRIPTION

[0033] The following content will describe several embodiments of the present invention, including embodiments corresponding to the drawings. It can be understood that the drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be understood as limiting the scope of protection of the present invention.

[0034] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0035] It should be noted that, unless otherwise clearly defined, when a feature is referred to as "fixed", "connected" or "installed" on another feature, it can be directly fixed or connected to another feature, or it can be indirectly fixed or connected to another feature. The words "fixed", "connected" or "installed" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in the present invention in combination with the specific content of the technical solution.

[0036] It should be noted that the description of the orientation or position relationship indicated by up, down, left, right, top, bottom, front, back, inside, outside, etc. used in the present invention is based on the orientation or position relationship of the drawings or embodiments, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] It should be noted that the term "and / or" used in the present invention includes any combination of one or more related listed items, "above", "below", "within", etc. are understood to include the number itself.

[0038] It should be noted that, in the present invention, the description of first and second is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0039] It should be noted that, unless otherwise clearly defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention.

[0040] Reference Figure 1-Figure 5 The basic embodiment of the first aspect of the present invention provides a colloid variable injection pipeline switching structure, comprising:

[0041] The injection needle 100 is provided with an external thread;

[0042] The detection needle 200 is disposed in the injection needle 100, and an inverted tapered tube 210 is disposed at the upper end of the detection needle 200;

[0043] The colloid 300 is disposed in the injection needle 100. The colloid 300 is in an inverted cone shape. A through hole 310 is provided in the middle of the colloid 300. The through hole 310 is connected to the inner cavity of the detection needle 200. The conical surface of the lower end of the colloid 300 is suitable for the inverted cone tube 210. The upper end of the colloid 300 abuts against the injection needle 100.

[0044] The power piece 400 is disposed on the injection needle 100. The power piece 400 is provided with an internal thread. The internal thread and the external thread cooperate so that the power piece 400 can drive the colloid 300 to rotate and penetrate into the inverted tapered tube 210, so that the colloid 300 and its through hole 310 shrink, and the upper end of the colloid 300 is away from the inner wall of the injection needle 100. An injection chamber 410 is provided between the power piece 400 and the injection needle 100.

[0045] A colloid-variable injection line switching structure according to a basic embodiment of the first aspect of the present invention is provided. During injection, the injection chamber 410, the through hole 310, and the detection needle 200 are connected. If the needle tip is inserted into the blood vessel cavity, blood will flow into the inner cavity of the needle due to the blood pressure difference between the chamber and the blood vessel. The blood in the chamber can be observed by observing the chamber to determine whether the needle tip is in the blood vessel. If the blood vessel is not pierced, the driving power member 400 causes the colloid 300 to penetrate into the inverted conical tube 210, causing the colloid 300 and its through hole 310 to shrink, and causing the upper surface of the colloid 300 to The end is away from the inner wall of the injection needle 100, so that the injection needle tube is connected, and the detection needle 200 is disconnected, so that the syringe can inject medicine through the injection needle 100; when the needle tip is inserted into the blood vessel, after the needle tube is taken out, the connector 600 is connected to the syringe, and physiological saline can be passed to clean the blood in the injection needle, so that the injection needle 100 can be reused; by rotating the power part 400, the colloid 300 rotates with the power part 400, and the colloid 300 penetrates into the inverted tapered tube 210, and the colloid 300 is squeezed, contracted and deformed by the inverted tapered tube 210.

[0046] It is understandable that the power member 400, the injection needle 100 (except the needle tube position), and the detection needle 200 (except the needle tube position) are all made of transparent materials to facilitate observation of bleeding conditions.

[0047] It can be understood that the detection needle 200 is arranged inside the injection needle 100, and the diameter of the injection needle 100 is smaller than that of the detection needle 200. Therefore, the detection needle 200 can be arranged inside the injection needle 100, and the inner cavity of the injection needle 100 is the space between the inner wall of the detection needle 200 and the outer wall of the detection needle 200, and the inner cavity of the detection needle 200 is the space inside the detection needle 200.

[0048] In some embodiments, the power member 400 is provided with a connecting rod 420, and the connecting rod 420 is connected to the colloid 300. The connecting rod 420 is connected to the colloid 300, so that the power member 400 can drive the colloid 300 to move, and the connecting rod 420 is small in size, does not occupy a large space of the connecting rod 420, and does not interfere with the user's observation of the blood condition.

[0049] In some embodiments, a locking member 500 is further included, and the locking member 500 is used to relatively fix the power member 400 and the injection needle 100. The locking member 500 prevents the power member 400 from moving, resulting in the colloid 300 not fitting with the inner wall of the inverted tapered tube 210, the colloid 300 and the injection needle 100, thereby causing the injection needle 100 to communicate with the detection needle 200, affecting the injection effect.

[0050] In some embodiments, the power member 400 is provided with a first locking hole 430, the injection needle 100 is provided with a second locking hole 110, and the locking member 500 can be inserted into the first locking hole 430 and the second locking hole 110. By inserting the locking member 500 into the first locking hole 430 and the second locking hole 110 at the same time, the injection needle 100 is prevented from moving axially or radially, thereby deforming the colloid 300.

[0051] In some embodiments, the power member 400 is provided with a third locking hole 440, and the locking member 500 can be inserted into the second locking hole 110 and the third locking hole 440 at the same time, and the locking hole is arranged above the first locking hole 430. By inserting the locking member 500 into the second locking hole 110 and the third locking hole 440 at the same time, the injection needle 100 is prevented from moving axially or radially, and the colloid 300 is reset to restore the original position.

[0052] In some embodiments, the power member 400 is provided with a pressure exhaust port, and the pressure exhaust port is used to discharge the gas squeezed when the power member 400 drives the colloid 300.

[0053] In some embodiments, a reinforcing rib 120 is provided between the injection needle 100 and the detection needle 200 to improve the installation stability of the detection needle 200, so that the injection needle 100 and the detection needle 200 are relatively fixed, and the stability of the inverted tapered tube 210 is improved, so that the colloid 300 will not be displaced or deformed during movement.

[0054] In some embodiments, the power member 400 is provided with a sealing plate 450, and the sealing plate 450 abuts against the inner wall of the injection needle 100. Since the power member 400 can move relative to the injection needle 100, a certain gap between the two can easily cause the injection liquid to penetrate the injection needle 100. By abutting the injection needle 100 with the sealing plate 450, the airtightness of the injection needle 100 can be improved.

[0055] In some embodiments, a connector 600 is further included. The connector 600 is disposed on the power component 400 . The connector 600 is connected to the injection chamber 410 . The connector 600 is used to connect the syringe.

[0056] In some embodiments, one of the joint 600 and the power member 400 is provided with an annular groove, and the other is provided with an annular block 610. The annular groove and the annular block 610 cooperate to enable the joint 600 and the power member 400 to rotate relative to each other. When the power member 400 is rotated, the joint 600 is prevented from rotating together with it, so that the power member 400 can be moved easily.

[0057] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", "extended embodiment" etc. may be used to describe several embodiments of the present invention. The specific features, structures, materials or characteristics of the several embodiments may be combined in accordance with the principles and purposes of the present invention.

[0058] Although some embodiments of the present invention have been shown and described in this specification, the present invention should not be limited to the above-mentioned embodiments. As long as the technical effects of the present invention are achieved by the same or equivalent means, any changes, modifications, equivalent substitutions and equivalent variations to these embodiments that are within the spirit and principles of the present disclosure and do not depart from the principles and purpose of the present invention should be included in the scope of protection of the present disclosure and should be deemed to be within the scope of protection of the present invention.

Claims

1. A colloid variable injection pipeline switching structure, characterized in that: include: An injection needle (100) having an external thread; A detection needle (200) is arranged in the injection needle (100), and an inverted tapered tube (210) is provided at the upper end of the detection needle (200); A colloid (300) is arranged in the injection needle (100), the colloid (300) is in an inverted cone shape, a through hole (310) is arranged in the middle of the colloid (300), the through hole (310) is connected to the inner cavity of the detection needle (200), the conical surface of the lower end of the colloid (300) is suitable for the inverted cone tube (210), and the upper end of the colloid (300) abuts against the injection needle (100); A power piece (400) is arranged on the injection needle (100), and the power piece (400) is provided with an internal thread. The internal thread and the external thread cooperate so that the power piece (400) can drive the colloid (300) to rotate and penetrate into the inverted conical tube (210), so that the colloid (300) and its through hole (310) shrink, and the upper end of the colloid (300) is away from the inner wall of the injection needle (100). An injection chamber (410) is arranged between the power piece (400) and the injection needle (100).

2. The colloid-variable injection pipeline switching structure according to claim 1 is characterized in that: It also includes a connector (600), which is arranged on the power component (400), the connector (600) is connected to the injection chamber (410), and the connector (600) is used to connect a syringe.

3. The colloid-variable injection pipeline switching structure according to claim 2 is characterized in that: The joint (600) and the power member (400) are provided with an annular groove on one side and an annular block (610) on the other side. The annular groove and the annular block (610) cooperate to enable the joint (600) and the power member (400) to rotate relative to each other.

4. The colloid-variable injection pipeline switching structure according to claim 1 is characterized in that: The power member (400) is provided with a pressure discharge port, and the pressure discharge port is used to discharge the gas squeezed when the power member (400) drives the colloid (300).

5. The colloid-variable injection pipeline switching structure according to claim 1, characterized in that: It also comprises a locking member (500), wherein the locking member (500) is used to relatively fix the power member (400) and the injection needle (100).

6. The colloid-variable injection pipeline switching structure according to claim 5, characterized in that: The power member (400) is provided with a first locking hole (430), the injection needle (100) is provided with a second locking hole (110), and the locking member (500) can be inserted into the first locking hole (430) and the second locking hole (110).

7. The colloid-variable injection pipeline switching structure according to claim 6, characterized in that: The power member (400) is provided with a third locking hole (440), which is arranged above the first locking hole (430), and the locking member (500) can be inserted into the second locking hole (110) and the third locking hole (440) at the same time.

8. The colloid-variable injection pipeline switching structure according to claim 1, characterized in that: The power member (400) is provided with a connecting rod (420), and the connecting rod (420) is connected to the colloid (300).

9. The colloid-variable injection pipeline switching structure according to claim 1, characterized in that: A reinforcing rib (120) is provided between the injection needle (100) and the detection needle (200).

10. The colloid-variable injection pipeline switching structure according to claim 1, characterized in that: The power member (400) is provided with a sealing plate (450), and the sealing plate (450) abuts against the inner wall of the injection needle (100).

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