Guide needle and needle assembly

Abstract

The utility model relates to a guide needle and a needle assembly, the guide needle comprises a needle handle and a needle core arranged on the needle handle, the needle core is used for puncturing an object, and the needle core is provided with a mounting groove used for mounting a blood glucose detection module; the guide needle further comprises a needle locking structure arranged on the needle handle, and the needle locking structure is configured to be capable of locking the guide needle. The needle handle and the needle locking structure are of an integrally-formed structure. The needle handle and the needle locking structure are integrally formed, so that molds can be saved, assembly steps can be reduced, the assembly efficiency can be improved, and the assembly time can be shortened.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an introducer needle and a needle assembly. Background Art

[0002] A continuous blood glucose monitor generally includes a sensor probe and a processing device that records the sensor information. When performing dynamic blood glucose monitoring, the sensor probe is often buried under the skin of the subject. The working electrode of the probe is provided with a glucose-sensitive reagent, which can specifically react with the glucose molecules at the implantation site to generate an electrical signal. The processing device processes the electrical signal to obtain the blood glucose value and the patient's blood glucose changes.

[0003] The sensor probe is typically made of a flexible material and, without relying on external forces, has difficulty penetrating the subject's skin and reaching the desired location. Inserting the glucose sensor beneath the skin and applying the electronic device to the skin typically requires the aid of an insertion device. Specifically, the insertion device may include an introducer needle capable of piercing the skin. The glucose sensor is inserted beneath the skin through the introducer needle, and then separated from the glucose sensor and removed from the skin. Typically, the introducer needle has a U-shaped groove, within which the glucose sensor is placed.

[0004] However, the guide needle and locking needle structure in the related art are separate structures, and both require separate molds, and then the guide needle and locking needle structure are assembled, which has low assembly efficiency and takes a long time. Summary of the Invention

[0005] Based on this, it is necessary to provide a guide needle and needle assembly that can save molds, reduce assembly steps, improve assembly efficiency and reduce assembly time.

[0006] A guide needle comprises a needle handle and a needle core arranged on the needle handle, wherein the needle core is provided with a mounting groove for mounting a blood glucose detection module;

[0007] The guide needle further includes a locking needle structure provided on the needle handle, and the locking needle structure is configured to lock the guide needle; the needle handle and the locking needle structure are an integrally formed structure.

[0008] In the above scheme, by setting up a locking needle structure, the locking needle structure can lock the guide needle so that the guide needle is fixed relative to the locking needle structure; by setting the needle handle and the locking needle structure as an integrally molded structure, the mold can be saved, the assembly steps can be reduced, the assembly efficiency can be improved and the assembly time can be reduced.

[0009] In one embodiment, the locking needle structure includes a mounting portion and a first limiting member arranged on the mounting portion, the mounting portion is arranged at an end of the needle handle away from the needle core, and the first limiting member is configured to prevent the needle handle from rotating when the needle core penetrates the object.

[0010] By providing the first limiting member, the needle handle is prevented from rotating when the needle core penetrates the object, thereby ensuring the stability of the penetration.

[0011] In one embodiment, a second limiting member is further provided on an end of the mounting portion away from the needle handle, and the second limiting member is configured to prevent the needle handle from being excessively pulled out when the needle core is pulled out of an object.

[0012] By providing a second limiting member, when the needle core is pulled out of the object, the needle handle is prevented from being pulled out excessively, so as to prevent the guide needle from falling to the ground, thereby causing contamination and damage.

[0013] In one embodiment, a protrusion is formed on one end of the mounting portion close to the needle handle, and a mounting chamber for mounting an elastic member is formed between the protrusion and the needle handle.

[0014] The present application also provides a needle assembly, comprising the guide needle and a needle seat as described above, wherein the guide needle is movably disposed on the needle seat.

[0015] In one embodiment, a mounting hole is provided on the needle seat, and the mounting hole passes through the needle seat, and the guide needle is movably mounted in the mounting hole.

[0016] In one embodiment, the needle assembly further comprises two connecting members arranged on the needle seat and spaced apart from each other, and the guide needle is accommodated between the two connecting members; two limiting portions are provided at one end of the connecting member away from the needle seat, and the two limiting portions are arranged along an axial direction perpendicular to the guide needle and spaced apart, and the first limiting member of the guide needle can be embedded between the two limiting portions.

[0017] The first limiting member is embedded between the two limiting parts. When the guide needle moves, the two limiting parts limit the first limiting member, limiting only the guide needle to move up and down, and preventing the guide needle from rotating.

[0018] In one embodiment, the limiting portion, the connecting member and the needle seat form an installation space, the second limiting member of the guide needle is located in the installation space, and the limiting portion can abut against the second limiting member.

[0019] The second limiting member is a first inclined surface provided on the end of the mounting portion away from the needle handle, and a second inclined surface is provided on the end of the limiting portion close to the needle seat. The first inclined surface can abut against the second inclined surface to prevent the guide needle from being pulled out excessively, and the structure of the first inclined surface and the second inclined surface cooperating can facilitate the detachment of the guide needle.

[0020] In one embodiment, a first arcuate surface is provided on a side of the connector close to the guide needle, and a second arcuate surface is provided on an outer side of the protruding portion of the guide needle, and the first arcuate surface and the second arcuate surface form a surface-to-surface fit.

[0021] The matching structure formed by the first curved surface and the second curved surface can play a limiting role. When the guide needle moves, the second curved surface of the guide needle moves along the extension direction of the first curved surface, which can provide a limiting effect for the movement of the guide needle, preventing the guide needle from deviating during the movement and affecting the puncture effect; and the matching structure formed by the first curved surface and the second curved surface can control the moving direction of the guide needle, which can facilitate the installation of the glucose sensor and the needle core.

[0022] In one embodiment, the needle assembly further includes an elastic member, which is accommodated in the mounting chamber of the guide needle, and one end of the elastic member abuts against the mounting portion of the guide needle, and the other end of the elastic member abuts against the needle seat.

[0023] When the guide needle is not inserted into the object, the return spring can be in a compressed state to provide energy storage for the guide needle to penetrate the object, and can provide a return force for the guide needle when the object is pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 Schematic diagram of the structure of a guide needle shown in one embodiment of the present application.

[0027] Figure 2 Schematic diagram of the structure of a needle assembly shown in one embodiment of the present application.

[0028] Figure 3This is a cross-sectional structural diagram of a needle assembly shown in an embodiment of the present application.

[0029] Description of Reference Numerals

[0030] 10. Guide needle; 100. Needle handle; 110. Mounting portion; 120. First stopper; 130. Second stopper; 140. Protruding portion; 141. Second curved surface; 150. First connecting portion; 160. Second connecting portion; 170. Intermediate portion; 200. Needle core;

[0031] 20. Needle assembly; 300. Needle seat; 310. Mounting hole; 320. Connecting piece; 321. Limiting portion; 322. First arc-shaped surface; 400. Elastic piece. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application 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 this application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0035] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0038] The guide needle and locking needle structure in the related technology are separate structures, and both require separate molds, and then the guide needle, locking needle structure and needle seat are assembled. The locking needle structure can lock the guide needle so that the guide needle is fixed relative to the locking needle structure. The assembly efficiency is low and the assembly takes a long time.

[0039] To solve the above technical problems, please refer to Figure 1 The present invention relates to an introducer needle 10, comprising a needle handle 100 and a needle core 200 disposed on the needle handle 100, wherein the needle core 200 is used to penetrate an object. The needle core 200 is disposed at one end of the needle handle 100. The object is a patient's body.

[0040] See also Figure 1, the needle handle 100 and the needle core 200 are an integral structure. Specifically, the needle handle 100 and the needle core 200 are an injection-molded integral structure. More specifically, the needle handle 100 is made of plastic material, and the needle core 200 is made of metal material. During injection molding, the needle core 200 can be placed in the injection mold first, and then injection molding is performed, so that the needle handle 100 and the needle core 200 are injection-molded into an integral structure. By setting the needle handle 100 and the needle core 200 as an integral structure, the connection strength of the needle handle 100 and the needle core 200 can be ensured, and the phenomenon of the needle handle 100 and the needle core 200 being broken can be prevented.

[0041] See also Figure 1 The needle core 200 is provided with a mounting groove for mounting a blood glucose detection module. The blood glucose detection module is a glucose sensor. The mounting groove on the needle core 200 is a U-shaped groove.

[0042] The guide needle 10 also includes a locking needle structure on the needle handle 100. This structure is configured to lock the guide needle 10, securing it against the needle. The needle handle 100 and the locking needle structure are integrally formed. This design saves molds, reduces assembly steps, and improves assembly efficiency and reduces assembly time.

[0043] See also Figure 1 According to some embodiments of the present application, the needle locking mechanism optionally includes a mounting portion 110 and a first stopper 120 disposed on mounting portion 110. Mounting portion 110 is disposed at the end of needle handle 100 away from needle core 200. First stopper 120 is configured to prevent needle handle 100 from rotating when needle core 200 penetrates a subject. By providing first stopper 120, rotation of needle handle 100 is prevented when needle core 200 penetrates a subject, ensuring insertion stability.

[0044] See also Figure 1 According to some embodiments of the present application, a second stopper 130 is optionally provided on the end of the mounting portion 110 away from the needle handle 100. The second stopper 130 is configured to prevent the needle handle 100 from being pulled out too far when the needle core 200 is removed from the object. The second stopper 130 prevents the needle handle 100 from being pulled out too far when the needle core 200 is removed from the object, thereby preventing the introducer needle 10 from falling to the ground and causing contamination and damage.

[0045] See also Figure 1According to some embodiments of the present application, a protrusion 140 is optionally formed on one end of the mounting portion 110 near the needle handle 100. A mounting cavity for mounting the elastic member 400 is formed between the protrusion 140 and the needle handle 100. Specifically, two protrusions 140 are provided, one at each end of the mounting portion 110. The extension direction of the protrusion 140 is parallel to the extension direction of the needle handle 100.

[0046] See also Figure 1 、 Figure 2 and Figure 3 The present application also provides a needle assembly 20, comprising the above-described introducer needle 10 and a needle hub 300, wherein the introducer needle 10 is disposed on the needle hub 300. Specifically, the introducer needle 10 can be slidably connected to the needle hub 300. During assembly, the present application only requires the introducer needle 10 to be assembled with the needle hub 300, without the need for further assembly with a separate locking needle structure, thereby reducing assembly steps and improving assembly efficiency.

[0047] See also Figure 1 、 Figure 2 and Figure 3 According to some embodiments of the present application, optionally, a mounting hole 310 is provided on the needle hub 300, and the mounting hole 310 is set through the needle hub 300. The guide needle 10 is movably mounted in the mounting hole 310. Specifically, the needle handle 100 of the guide needle 10 is slidably connected in the mounting hole 310.

[0048] The needle handle 100 includes a first connecting portion 150, a second connecting portion 160 and an intermediate portion 170 disposed between the first connecting portion 150 and the second connecting portion 160. The diameter of the intermediate portion 170 is smaller than the diameters of the first connecting portion 150 and the second connecting portion 160, which can reduce the weight of the needle handle 100 and thus reduce the overall weight.

[0049] The outer wall of the second connecting portion 160 of the needle handle 100 fits against the inner wall of the mounting hole 310 , thereby supporting the guide needle 10 , and the second connecting portion 160 can move up and down along the axial direction of the mounting hole 310 .

[0050] See also Figure 1 、 Figure 2 and Figure 3 According to some embodiments of the present application, the needle assembly 20 optionally further includes two connecting members 320 disposed on the needle hub 300 and spaced apart from each other, with the guide needle 10 accommodated between the two connecting members 320. Two limiting portions 321 are disposed at one end of the connecting member 320 away from the needle hub 300. The two limiting portions 321 are disposed perpendicular to the axial direction of the guide needle 10 and spaced apart from each other, and the first limiting member 120 of the guide needle 10 can be embedded between the two limiting portions 321.

[0051] An accommodating space for accommodating the guide needle 10 is formed between the two connecting members 320 , and the guide needle 10 is accommodated in the accommodating space. The two connecting members 320 are arranged opposite to each other.

[0052] The two limiting portions 321 are positioned toward the interior of the accommodation space. A first limiting member 120 protrudes from the end of the mounting portion 110 away from the needle handle 100. The extending direction of the limiting portion 321 and the first limiting member 120 is parallel to the extending direction of the guide needle 10. The first limiting member 120 is embedded between the two limiting portions 321. When the guide needle 10 moves, the two limiting portions 321 constrain the first limiting member 120, limiting the guide needle 10 to vertical movement and preventing it from rotating.

[0053] See also Figure 1 、 Figure 2 and Figure 3 According to some embodiments of the present application, the stopper 321, the connector 320, and the needle hub 300 optionally form an installation space, and the second stopper 130 of the guide needle 10 is located within the installation space. The stopper 321 is located above the second stopper 130 of the guide needle 10 and can abut against the second stopper 130.

[0054] Specifically, the second limiting member 130 is a first inclined surface opened on the end of the mounting portion 110 away from the needle handle 100, and a second inclined surface is provided on the end of the limiting portion 321 close to the needle seat 300. The first inclined surface can abut against the second inclined surface to prevent the guide needle 10 from being pulled out excessively, and the structure of the first inclined surface and the second inclined surface cooperating with each other can facilitate the detachment of the guide needle 10.

[0055] See also Figure 1 、 Figure 2 and Figure 3 According to some embodiments of the present application, the needle assembly 20 optionally further includes an elastic member 400, which is accommodated in the mounting chamber of the guide needle 10, with one end of the elastic member 400 abutting against the mounting portion 110 of the guide needle 10, and the other end of the elastic member 400 abutting against the needle seat 300. Specifically, the elastic member 400 is a return spring.

[0056] The return spring is sleeved on the outside of the needle handle 100. When the object is not pierced, the return spring can be in a compressed state to provide energy storage for the guide needle 10 to pierce the object, and can provide a return force for the guide needle 10 when the object is pulled out.

[0057] See also Figure 1 、 Figure 2 and Figure 3According to some embodiments of the present application, optionally, a first curved surface 322 is provided on the side of the connecting member 320 close to the guide needle 10, and a second curved surface 141 is provided on the outer side of the protruding portion 140 of the guide needle 10, and the first curved surface 322 and the second curved surface 141 form a surface-to-surface fit.

[0058] The matching structure formed by the first curved surface 322 and the second curved surface 141 can play a limiting role. When the guide needle 10 moves, the second curved surface 141 of the guide needle 10 moves along the extension direction of the first curved surface 322, which can provide a limiting effect for the movement of the guide needle 10, preventing the guide needle 10 from deviating during the movement and affecting the puncture effect.

[0059] Furthermore, the matching structure formed by the first arcuate surface 322 and the second arcuate surface 141 can control the moving direction of the guide needle 10 , thereby facilitating the installation of the glucose sensor and the needle core 200 .

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A guide needle, characterized in that: It includes a needle handle and a needle core arranged on the needle handle, wherein the needle core is provided with a mounting groove for mounting a blood glucose detection module; The guide needle further includes a locking needle structure provided on the needle handle, and the locking needle structure is configured to lock the guide needle; the needle handle and the locking needle structure are an integrally formed structure.

2. The guide needle according to claim 1, characterized in that The locking needle structure includes a mounting portion and a first limiting member arranged on the mounting portion. The mounting portion is arranged at an end of the needle handle away from the needle core. The first limiting member is configured to prevent the needle handle from rotating when the needle core penetrates the object.

3. The guide needle according to claim 2, characterized in that: A second limiting member is further provided on one end of the mounting portion away from the needle handle, and the second limiting member is configured to prevent the needle handle from being excessively pulled out when the needle core is pulled out of an object.

4. The guide needle according to claim 3, characterized in that: A protruding portion is formed on one end of the mounting portion close to the needle handle, and a mounting chamber for mounting an elastic member is formed between the protruding portion and the needle handle.

5. A needle assembly, characterized in that: It comprises the guide needle and needle seat as described in claim 4, wherein the guide needle is movably arranged on the needle seat.

6. The needle assembly according to claim 5, wherein The needle seat is provided with a mounting hole which passes through the needle seat, and the guide needle is movably mounted in the mounting hole.

7. The needle assembly according to claim 5, wherein The needle assembly also includes two connecting parts arranged on the needle seat and spaced apart, and the guide needle is accommodated between the two connecting parts; two limiting parts are provided at one end of the connecting part away from the needle seat, and the two limiting parts are arranged along an axial direction perpendicular to the guide needle and spaced apart, and the first limiting part of the guide needle can be embedded between the two limiting parts.

8. The needle assembly according to claim 7, wherein The limiting portion, the connecting member and the needle seat form an installation space. The second limiting member of the guide needle is located in the installation space, and the limiting portion can abut against the second limiting member.

9. The needle assembly according to claim 7, wherein A first arcuate surface is provided on a side of the connector close to the guide needle, and a second arcuate surface is provided on an outer side of the protruding portion of the guide needle, and the first arcuate surface and the second arcuate surface form a surface-to-surface fit.

10. The needle assembly according to claim 5, wherein The needle assembly further includes an elastic member, which is accommodated in the mounting chamber of the guide needle, and one end of the elastic member abuts against the mounting portion of the guide needle, and the other end of the elastic member abuts against the needle seat.

Images