Pasting type medicine infusion device and implantation needle mechanism

Abstract

The utility model discloses an implantation needle mechanism, which relates to the technical field of medical instruments and comprises an annular support arranged on an infusion device, a needle seat is inserted in the annular support, an infusion needle is arranged on the needle seat, a clamping structure is arranged between the needle seat and the annular support, and a reset component is arranged in the annular support. The utility model further discloses an application type medicine infusion device which comprises the implantation needle mechanism, a pump body bottom plate and a pump body upper shell buckled on the pump body bottom plate, a medicine storage bin is arranged between the pump body bottom plate and the pump body upper shell, a mounting groove is formed in the pump body upper shell, the annular support is fixedly arranged in the mounting groove, and the annular support is fixedly connected with the pump body bottom plate. And the inside of the medicine storage bin is communicated with the infusion needle through a needle tube. The implantation needle mechanism and the pump body are integrally arranged, so that the overall size of the medicine infusion device is effectively reduced, and the overall carrying convenience of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments more specifically, relate to a kind of pasting formula medicine infusion device and implant needle mechanism. BACKGROUND

[0002] Pasting formula medicine infusion device is an innovative drug delivery method, it is directly pasted on the skin of patient by drug, and the therapeutic effect of drug is realized using the absorption capacity of skin.The device is usually applied to pasting formula insulin pump, and insulin pump is usually used to simulate the insulin secretion function of pancreas.

[0003] The existing pasting formula insulin pump usually adopts pump body and implant needle mechanism split design, thereby affecting the miniaturization and carrying convenience of product.

[0004] In summary, how to improve the carrying convenience of pasting formula medicine infusion device is a problem to be solved by the technical personnel in the field at present. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a kind of pasting formula medicine infusion device with implant needle mechanism, effectively reduce the volume of product, adopt integrated setting, improve the carrying convenience of device.

[0006] Another object of the utility model is to provide a kind of pasting formula medicine infusion device, including the pasting formula medicine infusion device with implant needle mechanism described above.

[0007] In order to achieve the above object, the utility model provides the following technical scheme:

[0008] A kind of pasting formula medicine infusion device with implant needle mechanism, including the annular support of setting on infusion device, needle holder is inserted in the annular support, and the needle holder slides along the inner side wall of the annular support, infusion needle is arranged on the needle holder, clamping structure is arranged between the needle holder and the annular support, so that the needle holder is pressed to complete injection needle and is clamped and fixed between the annular support, reset component is arranged in the annular support, so that the needle holder is reset after being separated from the clamping of the annular support.

[0009] Preferably, the clamping structure includes fixedly arranged on the inner wall of the annular support Fixed clamping block and fixedly arranged on the needle holder Elastic clamping block matched with the fixed clamping block.

[0010] Preferably, the reset component includes reset spring arranged in the annular support, one end of the reset spring is fixedly arranged in the annular support, and the other end of the reset spring is abutted on the needle holder.

[0011] Preferably, a sealing ring is fitted on the needle seat, and the outer surface of the sealing ring abuts against the inner wall of the annular bracket.

[0012] A patch-type drug infusion device includes the above-mentioned implantation needle mechanism. The infusion device also includes a pump body base plate and a pump body upper shell fastened to the pump body base plate. A drug storage chamber is provided between the pump body base plate and the pump body upper shell. An installation groove is provided on the pump body upper shell, and the annular bracket is fixedly installed in the installation groove.

[0013] The drug storage chamber is connected to the infusion needle via a needle tube. A micro infusion drive mechanism is provided in the drug storage chamber to inject the drug solution in the drug storage chamber into the infusion needle.

[0014] Preferably, a medical dressing is fixedly provided circumferentially on the pump body base plate so that the pump body base plate is placed in a designated position to complete the injection.

[0015] Preferably, an absorption assembly is fixedly provided on the side of the pump body base plate opposite to the pump body upper shell, and the absorption assembly is located below the infusion needle. The absorption assembly is used to absorb the medicine flowing out of the infusion needle during the emptying or filling process.

[0016] Preferably, the absorption assembly includes a drug storage plastic sheet fixedly disposed on the bottom plate of the pump body on the side opposite to the upper shell of the pump body, and the drug storage plastic sheet has a drug storage groove.

[0017] The implantable needle mechanism provided by this utility model includes an annular bracket disposed on an infusion device. A needle seat is inserted into the annular bracket and slides along the inner sidewall of the annular bracket. An infusion needle is disposed on the needle seat. A snap-fit ​​structure is provided between the needle seat and the annular bracket so that the needle seat, after being pressed, completes the injection and snaps and fixes itself to the annular bracket. A reset component is provided in the annular bracket so that the needle seat resets after disengaging from the snap-fit ​​with the annular bracket. The patch-type drug infusion device provided by this utility model includes the above-mentioned implantable needle mechanism. The infusion device also includes a pump body base plate and a pump body upper shell fastened to the pump body base plate. A drug storage chamber is provided between the pump body base plate and the pump body upper shell. An installation groove is opened on the pump body upper shell. The annular bracket is fixedly disposed in the installation groove. The drug storage chamber is connected to the infusion needle. A micro infusion drive mechanism is provided in the drug storage chamber so that the drug solution in the drug storage chamber is injected into the infusion needle.

[0018] The patch-type drug infusion device, implantation needle mechanism, and control method provided by this utility model realize the integrated design of the implantation needle mechanism and the pump body, effectively reducing the overall size of the drug infusion device, improving the overall portability of the device, and making the overall operation of the device simple and convenient. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the drug infusion device in this embodiment;

[0021] Figure 2 This is a top view of the drug infusion device in this embodiment;

[0022] Figure 3 for Figure 2 Sectional view at point AA;

[0023] Figure 4 for Figure 2 Sectional view at point BB;

[0024] Figure 5 This is a schematic diagram showing the installation location of the drug storage compartment in the drug infusion device in this embodiment;

[0025] Figure 6 This is a schematic diagram of the absorption component in this embodiment.

[0026] Figures 1-6 In the accompanying drawings, the reference numerals include:

[0027] 1. Annular bracket; 2. Needle seat; 3. Snap-fit ​​structure; 31. Fixing block; 32. Elastic block; 4. Reset assembly; 41. Reset spring; 5. Infusion needle; 6. Sealing ring; 7. Pump body base plate; 8. Pump body upper shell; 9. Mounting groove; 10. Drug storage chamber; 11. Absorption assembly; 111. Drug storage plastic sheet; 112. Drug storage tank. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. Terms such as "connection" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "up," "down," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. This application discloses a patch-type drug infusion device and an implantation needle mechanism.

[0030] The core of this utility model is to provide an implantation needle mechanism for a patch-type drug infusion device.

[0031] Another core aspect of this invention is to provide a patch-type drug infusion device, including the implantation needle mechanism for the aforementioned patch-type drug infusion device.

[0032] Another core aspect of this invention is to provide a control method for a patch-type drug infusion device, which is implemented using the aforementioned patch-type drug infusion device.

[0033] Please refer to Figures 1 to 4 The implantable needle mechanism for the patch-type drug infusion device provided by this utility model includes an annular support 1 disposed on the infusion device, a needle seat 2 inserted inside the annular support 1, and the needle seat 2 sliding along the inner side wall of the annular support 1. An infusion needle 5 is disposed on the needle seat. A snap-fit ​​structure 3 is provided between the needle seat 2 and the annular support 1 so that the needle seat 2 can be pressed to complete the injection and snap-fit ​​and fix it between the needle seat 2 and the annular support 1. A reset component 4 is provided inside the annular support 1 so that the needle seat 2 can be reset after disengaging from the snap-fit ​​with the annular support 1.

[0034] Specifically, the position of the locking structure 3 is set according to the specific downward movement of the infusion needle 5. Pressing the needle seat 2 moves the infusion needle downward. When the infusion needle 5 moves to the designated position, the locking structure 3 secures the needle seat 2 to the annular support 1, thereby ensuring that the infusion needle 5 remains stationary for infusion. After infusion is completed, adjusting the locking structure 3 releases the locking between the annular support 1 and the needle seat 2, and the reset component 4 resets the needle seat 2.

[0035] It should be noted that the infusion needle 5 is typically made of SUS304 stainless steel capillary tube with an outer diameter of 0.4 mm and an inner diameter of 0.2 mm. One end of the infusion needle 5 is bonded to the central axis of the needle holder 2, while the other end of the infusion needle 5 is suspended below the needle holder 2.

[0036] The above-mentioned patch-type drug infusion device uses an implantable needle mechanism to perform infusion by pressing the needle seat 2 and to reset the needle seat 2 by releasing the locking structure 3. The overall needle operation is simple. At the same time, the ring bracket 1 facilitates the insertion of the implantable needle mechanism into the mounting slot on the pump body, completing the integrated design and further improving the portability of the device.

[0037] The implantation needle mechanism for the patch-type drug infusion device provided by this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0038] Based on any of the above embodiments, refer to Figure 3 and Figure 4 The snap-fit ​​structure 3 includes a fixed snap-fit ​​block 31 fixedly disposed on the inner wall of the annular bracket 1 and an elastic snap-fit ​​block 32 fixedly disposed on the needle seat 2 and cooperating with the fixed snap-fit ​​block 31.

[0039] Specifically, there are two fixed locking blocks 31 arranged opposite each other, and two elastic locking blocks 32 are also arranged opposite each other to the fixed locking blocks 31. Each fixed locking block 31 has an inclined first guide surface on its upper part, and each elastic locking block 32 has a second guide surface that mates with the first guide surface on its lower part. During the pressing process of the needle seat 2, the two elastic locking blocks 32 are compressed towards the shaft of the annular bracket 1 under the guidance of the first and second guide surfaces until the second guide surface of the elastic locking block 32 separates from the first guide surface of the fixed locking block 31. The elastic locking block 32 then springs back to complete the locking engagement with the fixed locking block 31. During the reset process, the two elastic locking blocks 32 are squeezed to separate the elastic locking blocks 32 from the fixed locking blocks 31. Under the action of the reset component 4, the needle seat 2 is reset. The overall operation is simple and convenient.

[0040] Based on any of the above embodiments, refer to Figure 3 and Figure 4 The reset assembly 4 includes a reset spring 41 disposed in the annular bracket 1. One end of the reset spring 41 is fixedly disposed in the annular bracket 1, and the other end of the reset spring 41 abuts against the needle seat 2.

[0041] Specifically, during the pressing of the needle seat 2, the return spring 41 provides a pressing feel for the needle seat 2 and improves the tightness of the engagement between the fixing block 31 and the elastic block 32. At the same time, after the locking and fixing between the needle seat 2 and the annular bracket 1 is released, the return spring 41 realizes the push-back of the infusion needle 5, thus completing the reset of the needle seat 2.

[0042] Based on any of the above embodiments, refer to Figure 3 and Figure 4 A sealing ring 6 is fitted on the needle holder 2, and the outer surface of the sealing ring 6 abuts against the inner wall of the annular bracket 1.

[0043] Specifically, the sealing ring 6 effectively improves the sealing performance between the annular support 1 and the needle seat 2, ensuring reliable sealing of the drug solution during infusion.

[0044] Please refer to Figures 1 to 6 The patch-type drug infusion device provided by this utility model includes the above-mentioned implantation needle mechanism. The infusion device also includes a pump body base plate 7 and a pump body upper shell 8 fastened to the pump body base plate 7. A drug storage chamber 10 is provided between the pump body base plate 7 and the pump body upper shell 8. An installation groove 9 is provided on the pump body upper shell 8. An annular bracket 1 is fixedly installed in the installation groove 9. The drug storage chamber 10 is connected to the infusion needle 5 through a needle tube. A micro infusion drive mechanism is provided in the drug storage chamber 10 to inject the drug solution in the drug storage chamber 10 into the infusion needle 5.

[0045] Specifically, by placing the implantation needle mechanism within the mounting slot 9, the implantation needle mechanism and the pump body are integrated, effectively reducing the size of the drug infusion device and improving its portability. The micro-infusion drive mechanism can use a micro-stepper motor to expel the drug solution from the drug storage chamber 10.

[0046] Based on any of the above embodiments, a medical dressing (not shown in the figure) is fixedly provided circumferentially on the pump body base plate 7 so that the pump body base plate 7 is placed in a designated position to complete the injection.

[0047] Specifically, medical dressings are used to easily attach the pump body base plate 7 to the designated injection needle position, thereby fixing the pump body base plate 7 and enabling it to be implanted and used multiple times, further improving the convenience of the device.

[0048] Based on any of the above embodiments, an absorption component 11 is fixedly provided on the side of the pump body base plate 7 away from the pump body upper shell 8, and the absorption component 11 is located below the infusion needle 5. The absorption component 11 is used to absorb the medicine liquid flowing out of the infusion needle 5 during the emptying or filling process.

[0049] Specifically, during the process of emptying or filling the infusion needle 5, the absorption component 11 is used to absorb the liquid medicine flowing out of the infusion needle 5 to prevent the medicine from being contaminated and causing safety hazards.

[0050] Furthermore, the absorption assembly 11 includes a drug storage plastic sheet 111 fixedly disposed on the side of the pump body base plate 7 away from the pump body upper shell 8, and a drug storage groove 112 is provided on the drug storage plastic sheet 111.

[0051] Specifically, the liquid medicine flowing out of the infusion needle 5 is absorbed by the medicine storage plastic sheet 111 through the medicine storage tank 112. At the same time, since the medicine storage plastic sheet 111 is located below the infusion needle 5, when the infusion needle 5 moves downward due to accidental contact with the needle seat 2, the infusion needle 5 will preferentially pierce into the medicine storage plastic sheet 111, effectively preventing the infusion needle 5 from piercing the user and improving the safety performance of the device.

[0052] The control method for the patch-type drug infusion device provided by this utility model, using the above-mentioned patch-type drug infusion device, specifically includes:

[0053] S1. Place the infusion device at the designated injection needle position and control the micro infusion drive mechanism to fill the drug storage tank 10 into the infusion needle 5 with the drug solution;

[0054] S2. Press the needle seat 2 to inject the infusion needle into the subcutaneous tissue 4mm-5mm for infusion;

[0055] S3. After the infusion is completed, the adjusting snap-fit ​​structure 3 releases the snap-fit ​​between the needle seat 2 and the ring bracket 1, and the reset component 4 drives the needle seat 2 to reset.

[0056] The control method of the above-mentioned patch-type drug infusion device effectively realizes the transmission of drug solution and the rapid injection and repositioning of the infusion needle 5, and the overall operation is simple and convenient. At the same time, the integrated design of the pump body and the implantation needle mechanism effectively reduces the overall size of the device and improves its portability.

[0057] Based on any of the above embodiments, after the medicine in the drug storage chamber 10 is filled into the infusion needle 5, the system also includes a control absorption component 11 to absorb the medicine overflowing from the infusion needle 5, which effectively avoids the drug being contaminated and causing safety hazards.

[0058] The above provides a detailed description of the patch-type drug infusion device and implantation needle mechanism provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. An implantation needle mechanism, characterized in that, The device includes an annular support (1) installed on the infusion device, a needle seat (2) inserted inside the annular support (1), and the needle seat (2) sliding along the inner side wall of the annular support (1). An infusion needle (5) is provided on the needle seat. A snap-fit ​​structure (3) is provided between the needle seat (2) and the annular support (1) so that the needle seat (2) can be pressed to complete the injection and snap-fit ​​and fix it between the needle seat (2) and the annular support (1). A reset component (4) is provided inside the annular support (1) so that the needle seat (2) can be reset after disengaging from the snap-fit ​​with the annular support (1).

2. The implantation needle mechanism according to claim 1, characterized in that, The snap-fit ​​structure (3) includes a fixed snap-fit ​​block (31) fixedly disposed on the inner wall of the annular bracket (1) and an elastic snap-fit ​​block (32) fixedly disposed on the needle seat (2) and cooperating with the fixed snap-fit ​​block (31).

3. The implantation needle mechanism according to claim 1, characterized in that, The reset assembly (4) includes a reset spring (41) disposed in the annular bracket (1), one end of the reset spring (41) is fixedly disposed in the annular bracket (1), and the other end of the reset spring (41) abuts against the needle seat (2).

4. An implantation needle mechanism according to any one of claims 1-3, characterized in that, A sealing ring (6) is fitted on the needle seat (2), and the outer surface of the sealing ring (6) abuts against the inner wall of the annular bracket (1).

5. A patch-type drug infusion device, characterized in that, Including the implantation needle mechanism as described in any one of claims 1-4, the infusion device further includes a pump body base plate (7) and a pump body upper shell (8) fastened to the pump body base plate (7), a drug storage chamber (10) is provided between the pump body base plate (7) and the pump body upper shell (8), an installation groove (9) is provided on the pump body upper shell (8), and the annular bracket (1) is fixedly installed in the installation groove (9); The drug storage chamber (10) is connected to the infusion needle (5) through a needle tube. The drug storage chamber (10) is equipped with a micro infusion drive mechanism so that the drug liquid in the drug storage chamber (10) is injected into the infusion needle (5).

6. A patch-type drug infusion device according to claim 5, characterized in that, A medical dressing is fixedly installed circumferentially on the pump body base plate (7) so that the pump body base plate (7) can be placed in a designated position to complete the injection.

7. A patch-type drug infusion device according to any one of claims 5 or 6, characterized in that, An absorption assembly (11) is fixedly installed on the side of the pump body base plate (7) away from the pump body upper shell (8), and the absorption assembly (11) is located below the infusion needle (5). The absorption assembly (11) is used to absorb the liquid medicine flowing out of the infusion needle (5) during the emptying or filling process.

8. The patch-type drug infusion device according to claim 7, characterized in that, The absorption assembly (11) includes a drug storage plastic sheet (111) fixedly disposed on the side of the pump body bottom plate (7) away from the pump body upper shell (8), and a drug storage groove (112) is provided on the drug storage plastic sheet (111).

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