Subcutaneous injection device

Abstract

The invention relates to a subcutaneous injection device, belonging to the technical field of medical devices, comprising an adhesive base, an elastic membrane, an injection seat and a rotating seat; the adhesive base is adhered to human skin, the elastic membrane is horizontally connected to the adhesive base, and the elastic membrane and the adhesive base are coaxially arranged, the elastic membrane is located at the inner ring of the adhesive base, and the injection seat is installed on the adhesive base; the rotating seat is installed on the adhesive base and connected to the injection seat; the rotating seat is used to change the injection angle of the injection seat, and the implanted injection method can greatly reduce the pain caused by multiple insulin injections in diabetic patients in one day, and the implanted injection method can significantly reduce the injection point selection of patients and the pain caused by multiple injections by replacing the injection device once every 2-3 days, and the injection seat can also be rotated according to the different body shapes of patients in the implanted injection method, thereby ensuring the selection of a more suitable injection angle, so that the insulin can be fully absorbed.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a subcutaneous injection device. Background Art

[0002] An indwelling needle is an infusion tool, which is usually composed of a stainless steel needle core, a soft outer sleeve and a plastic needle seat. During puncture, the outer sleeve and the needle core are inserted into the blood vessel together, and then the needle core is pulled out, leaving the outer sleeve in the blood vessel.

[0003] Traditional insulin injections need to be performed multiple times a day, which will increase the pain felt by diabetics. The indwelling needle method can reduce the number of injections to once a day or less. Reducing the number of injections naturally reduces the number of skin punctures, thereby reducing the pain caused by frequent punctures.

[0004] For example, publication number CN211327419U discloses an insulin indwelling subcutaneous injection device, including a liquid transition tube, a needle is provided at the bottom of the liquid transition tube, a connecting tube is provided at the top of the liquid transition tube, an adhesive patch is provided at the bottom of the liquid transition tube, the liquid transition tube and the adhesive patch are connected by a fixed sleeve, and the fixed sleeve and the adhesive patch are fixedly connected; when used, frequent injections are not required, which reduces the pain of patients. The needle is vertically implanted into the subcutaneous tissue and fixed to the skin with a patch to reduce the pain caused by multiple insulin injections required by diabetic patients every day;

[0005] In addition, the angle of the insulin needle will affect the injection. Different angles of the needle may cause insulin to be injected into different tissue layers. Generally speaking, different people will choose different insertion angles. For most adults, a 90-degree right-angle injection is usually recommended. This angle can ensure that the insulin is injected into the subcutaneous fat layer and avoid injection into the muscle layer. If the person is thin or weak, a 45° bevel injection may be more suitable. This angle can reduce the depth of the injection, avoid injection into the muscle layer, and also reduce the pain during injection. However, in the above-mentioned public documents, the needle is inserted vertically, and the insertion depth is inconsistent for people of different body shapes. Fixed vertical insertion will lead to poor insulin absorption. Therefore, it cannot solve the problem of choosing the insertion angle according to different people to achieve better insulin absorption effect. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides a subcutaneous injection device to solve the problem that the prior art cannot realize targeted selection of the insertion angle to achieve a better insulin absorption effect.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A subcutaneous injection device, comprising an adhesive base, an elastic membrane, an injection seat and a rotating seat; the adhesive base is attached to human skin, the elastic membrane is horizontally connected to the adhesive base, and the elastic membrane and the adhesive base are coaxially arranged, the elastic membrane is located at the inner ring of the adhesive base, and the injection seat is installed on the adhesive base;

[0009] The rotating seat is installed on the pasting base and connected to the injection seat; the rotating seat is used to change the injection angle of the injection seat.

[0010] Preferably, the rotating seat includes a supporting seat, a first telescopic block, a second telescopic block and a fixed assembly; the supporting seat is installed on the pasting base, the first telescopic block is slidably connected to the supporting seat, the second telescopic block is embedded in the first telescopic block, the second telescopic block is slidably connected to the first telescopic block, the end of the second telescopic block away from the first telescopic block is connected to the injection seat, and the connection point is located at the top side of the injection seat; the fixed assembly is installed on the supporting seat and connected to the second telescopic block, and is used to drive the second telescopic block to telescope into the first telescopic block.

[0011] Preferably, the fixing assembly includes a tension bar, a sliding block and a sliding groove; one end of the tension bar is fixed to the support seat, and the other end is fixedly connected to the second telescopic block; the sliding groove is arranged on both sides of the support seat, the sliding block is slidably installed with any of the sliding grooves, the sliding block is slidably connected with the second telescopic block, and locking members are installed at both ends of any of the sliding grooves, and the locking members are used to lock the sliding block; the locking member includes a locking block and a locking groove; the locking groove is arranged at both ends of any of the sliding grooves, the locking block is slidably arranged on the sliding block, and the locking block and the locking groove limit cooperation to lock the sliding block; the lower end of the locking block is a symmetrical arc structure.

[0012] Preferably, from the axis of the pasting base toward the outside, the top of the support seat is an arc groove, and the arc groove is inclined from bottom to top.

[0013] Preferably, it further comprises two supporting ribs, wherein the two supporting ribs are arranged on the elastic membrane and located between the injection seat and the pasting base.

[0014] Preferably, the strength of the supporting ribs is greater than the strength of the adhesive base and greater than the strength of the elastic membrane.

[0015] Preferably, the injection seat comprises an injection hose having an injection cavity and a shell; the injection hose is arranged at the lower end of the shell, the shell is connected to the elastic membrane, and the shell is provided with an injection channel which is linearly connected to the injection cavity of the injection hose.

[0016] Preferably, the adhesive base includes an adhesive layer and a base layer, the adhesive is connected to the base layer, the adhesive layer is located at the lower end of the base layer, and the adhesive layer is used to be adhered to the skin; the base layer is made of breathable material.

[0017] Preferably, the length of the injection hose is 0.5-0.7 cm.

[0018] The beneficial effects of the present invention are:

[0019] The implanted injection method can greatly reduce the pain caused by multiple insulin injections a day for diabetic patients. The implanted injection method replaces the injection device every 2-3 days, which will significantly reduce the patient's injection point selection and the pain caused by multiple injections. In addition, the injection seat can be rotated according to the different body shapes of the patients, thereby ensuring that a more suitable injection angle is selected so that the insulin can be fully absorbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the structure of a subcutaneous injection device provided in one embodiment of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structural diagram of a subcutaneous injection device provided in one embodiment of the present invention;

[0023] Figure 3 It is a cross-sectional connection diagram of a fixing assembly provided in one embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the installation structure of a fixing assembly provided in one embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the top view of the structure of a subcutaneous injection device provided in one embodiment of the present invention;

[0026] Legend: 1. Adhesive base; 11. Adhesive layer; 12. Base layer; 2. Elastic membrane; 3. Injection seat; 31. Injection hose; 32. Shell; 321. Injection channel; 4. Rotating seat; 41. Support seat; 411. Arc groove; 42. First telescopic block; 43. Second telescopic block; 5. Fixed assembly; 51. Tension bar; 52. Sliding block; 53. Sliding groove; 61. Locking block; 62. Locking groove; 7. Support rib. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0028] like Figure 1-Figure 5 As shown, a subcutaneous injection device comprises an adhesive base 1, an elastic membrane 2, an injection seat 3 and a rotating seat 4; the adhesive base 1 is attached to human skin, the elastic membrane 2 is horizontally connected to the adhesive base 1, and the elastic membrane 2 is coaxially arranged with the adhesive base 1, the elastic membrane 2 is located in the inner ring of the adhesive base 1, and the injection seat 3 is installed on the adhesive base;

[0029] Traditional insulin injections need to be performed multiple times a day. Frequent injections will cause pain to diabetic patients, and each injection needs to be performed at a different injection point. After a long period of injection, the injection point will have lumps and hardening, which is not conducive to the injection and absorption of insulin. Therefore, the injection method of insulin is improved, and the injection tube is implanted into the subcutaneous tissue using an implantation method, so that when injecting, the injection can be performed at the same fixed point without frequently switching the injection point, reducing the patient's pain and avoiding the situation where there is no point to inject due to lumps at the injection point. In this application, after the hose is implanted into the subcutaneous tissue, it is fixed on the skin by sticking the base 1, which solves the problem of frequent injections causing pain to the patient.

[0030] Secondly, there are two commonly used methods of insulin injection. For most adults, a 90-degree right-angle injection is usually recommended. This angle can ensure that the insulin is injected into the subcutaneous fat layer and avoid injection into the muscle layer. For thin or weak people, a 45-degree oblique injection may be more suitable. This angle can reduce the depth of injection, avoid injection into the muscle layer, and also reduce the pain during injection. The method of injecting insulin with an implanted hose can only use a fixed single injection method, which will result in the low applicability of the implanted subcutaneous injection device, and the injection angle is crucial to the absorption of insulin. When injecting, the correct injection method needs to be selected to ensure that the dose of injected insulin can be absorbed.

[0031] The rotating seat 4 is installed on the adhesive base 1 and connected to the injection seat 3. The rotating seat 4 is used to change the injection angle of the injection seat 3. The rotating seat 4 is used to adjust the angle of the injection seat 3, so that the injection seat 3 can be transformed between multiple angles, and the corresponding angle can be selected according to the body shape to inject a line of insulin. Under the action of rotation, the injection seat 3 can rotate with the adhesive base 1 at an angle of 30° to 90°. In the initial state, the injection seat 3 and the adhesive base 1 remain vertical. If the injection is in a vertical state, the hose can be directly punctured into the subcutaneous tissue in a vertical state at this time, and insulin is injected in a vertical state afterwards; if it is necessary to choose to inject at an angle of 45°, then before the hose is implanted into the subcutaneous tissue, the angle of the injection seat 3 needs to be adjusted, so that the injection seat 3 rotates with the elastic membrane 2 as the base point, and is fixed at a 45° state under the action of the rotating seat 4. Due to the elastic effect of the elastic membrane 2, the injection seat 3 has the ability to rotate when the injection seat 3 and the rotating seat 4 rotate;

[0032] In summary, the implantation injection method can greatly reduce the pain caused by multiple insulin injections in a day for diabetic patients. The implantation injection method replaces the injection device every 2-3 days, which will significantly reduce the patient's injection point selection and the pain caused by multiple injections. Moreover, in the implantation injection method, the injection seat 3 can also be rotated according to the different body shapes of the patients, thereby ensuring the selection of a more suitable injection angle so that the insulin can be fully absorbed.

[0033] In one embodiment, the rotating seat 4 includes a supporting seat 41, a first telescopic block 42, a second telescopic block 43 and a fixing assembly 5; the supporting seat 41 is installed on the pasting base 1, the first telescopic block 42 is slidably connected to the supporting seat 41, the second telescopic block 43 is embedded in the first telescopic block 42, the second telescopic block 43 is slidably connected to the first telescopic block 42, the end of the second telescopic block 43 away from the first telescopic block 42 is connected to the injection seat 3, and the connection point is located at the top side of the injection seat 3; the fixing assembly 5 is installed on the supporting seat 41 and is connected to the second telescopic block 43, and is used to drive the second telescopic block 43 to telescope into the first telescopic block 42; the supporting seat 41 is firmly installed on the pasting base 1 as the basis of the entire rotating seat 4, and the pasting base 1 provides stable support so that the entire rotating seat 4 can be firmly fixed in one position; the first telescopic block 42 can be moved along It slides along the path of the support seat 41, allowing the first telescopic block 42 to telescope on the support seat 41, thereby changing the telescopic state of the first telescopic block 42; the second telescopic block 43 is embedded in the first telescopic block 42 and connected to the first telescopic block 42. The second telescopic block 43 can telescope inside the first telescopic block 42, thereby changing the connection distance between the injection seat 3 and the rotating seat 4. When the fixed component 5 drives the second telescopic block 43 to telescope inside the first telescopic block 42, the angle of the injection seat 3 relative to the pasting base 1 can be changed through the telescopic movement, thereby adjusting the position of the injection seat 3. By adjusting the fixed component 5, the telescopic amount of the second telescopic block 43 in the first telescopic block 42 is controlled. This adjustment will cause the position of the injection seat 3 in the vertical direction to change, thereby changing the rotation angle of the injection seat 3 around the rotating seat 4.

[0034] In one embodiment, the fixing assembly 5 includes a tension bar 51, a sliding block 52 and a sliding groove 53; one end of the tension bar 51 is fixed to the support seat 41, and the other end is fixedly connected to the second telescopic block 43; the sliding groove 53 is arranged on both sides of the support seat 41, the sliding block 52 is slidably installed with any sliding groove 53, the sliding block 52 is slidably connected with the second telescopic block 43, and locking members are installed at both ends of any sliding groove 53, and the locking members are used to lock the sliding block 52; the locking member includes a locking block 61 and a locking groove 62; the locking groove 62 is arranged at both ends of any sliding groove 53, and the locking block The locking block 61 is slidably arranged on the sliding block 52, and the locking block 61 and the locking groove 62 are limitedly matched to lock the sliding block 52; the lower end of the locking block 61 is a symmetrical arc structure; the main function of the tension bar 51 is to provide a stable connection and tension, so that the user can control the telescopic action of the second telescopic block 43 by pulling the tension bar 51; the sliding groove 53 is arranged on both sides of the support seat 41, providing a predetermined sliding path for the sliding block 52, and the sliding block 52 slides freely in the sliding groove 53, but is restricted by the sliding groove 53 to ensure that it moves in the correct direction; The moving block 52 is slidably connected with the second telescopic block 43. This connection allows the sliding block 52 to drive the second telescopic block 43 to perform corresponding telescopic actions when moving, and finally the second telescopic block 43 drives the rotating seat 4 to rotate the angle, so as to select the injection angle according to the patient's body shape; the locking member is installed at both ends of the sliding groove 53, which is used to lock the sliding block 52, so as to fix the position of the second telescopic block 43. The locking member includes a locking block 61 and a locking groove 62. The locking groove 62 is set at both ends of the sliding groove 53, and the locking block 61 is slidably set on the sliding block 52. When the sliding block 52 moves to the sliding groove 53, the locking block 61 can be limitedly cooperated with the corresponding locking groove 62, so as to lock the sliding block 52 and prevent it from further sliding, thereby ensuring the stability of the injection seat 3 and preventing the injection seat 3 from sliding during reinjection due to poor fixation caused by adjusting the angle of the injection seat 3, thereby avoiding accidental injury to the patient; the lower end of the locking block 61 is designed as a symmetrical arc structure, which helps the locking block 61 to enter or exit the locking groove 62 more smoothly when the sliding block 52 moves, thereby improving the convenience and reliability of operation.

[0035] In one embodiment, from the axis of the adhesive base 1 to the outside, the top of the support seat 41 is an arc groove 411, and the arc groove 411 is inclined from bottom to top; due to the inclined design of the arc groove 411, when the injection seat 3 is withdrawn after the injection is completed at a 45° angle, the inclined groove surface can provide a natural guide in the inclined direction for the movement of the injection seat 3, which helps to ensure that the needle withdrawal process is smoother and reduce operational difficulties or discomfort caused by improper direction; compared with the horizontal or vertical needle withdrawal path, the inclined support seat 41 can reduce the required needle withdrawal force, making the operation easier; during the needle withdrawal process, the injection seat 3 moves along the inclined arc groove 411 surface to reduce the impact on the skin surface Direct pressure and friction can avoid or reduce irritation and damage to the skin; the design of the arc groove 411 can ensure that the injection seat 3 always moves on the predetermined path during the needle withdrawal process, which enhances the stability and accuracy of the operation and reduces the risks caused by improper operation; by reducing the resistance to needle withdrawal and protecting the skin, it can improve the comfort and satisfaction of patients during the injection process and reduce their tension and anxiety; in summary, the arc groove 411 on the top of the support seat 41 is tilted from bottom to top from the axis of the adhesive base 1 to the outside, which can guide the needle withdrawal direction, reduce the resistance to needle withdrawal, protect the skin, enhance operational stability, and optimize the patient's experience during the needle withdrawal process at 45° injection. This design reflects the consideration of user experience and operational details, and improves the use effect of the injection device.

[0036] In one embodiment, since the rotating seat 4 rotates with the elastic membrane 2 as the force point, and the existence of the elastic membrane 2 makes the rotating seat 4 have elastic space and torque, and rotates with the elastic membrane 2 as the base point when the second telescopic block 43 performs telescopic activities, however, during the time when this injection device needs to be installed and worn, in order to ensure that the hose can be safely placed under the skin in daily life without accidental injury caused by the rotation of the injection seat 3 or pain caused by the rotation of the rotating seat 4, two support ribs 7 are also included. The support ribs 7 are arranged on the elastic membrane 2 and located between the injection seat 3 and the adhesive base 1. The support strength of the elastic membrane 2 is enhanced by setting the support ribs 7, and the strength between the elastic membrane 2 and the adhesive base 1 is reduced. In this way, the elastic membrane 2 not only has the elastic force that can allow the rotating seat 4 to rotate, but also can enhance the strength of the elastic membrane 2 and reduce the torque, so that in daily life, it can be ensured that the rotating seat 4 will not have a large torque when it collides with an external force, so that the hose can be stably placed under the skin, ensuring the stability of the injection device during use, thereby reducing the pain caused to the patient by accidental collisions in life.

[0037] In one embodiment, the strength of the support rib 7 is greater than the strength of the adhesive base 1 and greater than the strength of the elastic membrane 2; the high strength of the support rib 7 ensures that it can provide a stable support for the rotating seat 4. Since the rotating seat 4 is arranged on the elastic membrane 2, the support rib 7 can effectively disperse and resist the torque generated by the rotating seat 4 during the rotation process, and prevent the difficulty of inserting the hose due to excessive torque. The strength of the adhesive base 1 is between the support rib 7 and the elastic membrane 2, which can provide a certain support and allow a certain degree of deformation. When the rotating seat 4 rotates, the adhesive base 1 can absorb and transmit the torque appropriately, so that the torque can be smoothly transmitted to the elastic membrane 2, reducing sudden impact and stress concentration. The lower strength design of the elastic membrane 2 allows it to bend and deform more easily, thereby adapting to the movement of the rotating seat 4 during the rotation process. This design helps to reduce the friction and resistance generated by the rotation, so that the rotating seat 4 can rotate more smoothly. In summary, by reasonably setting the strength of the support ribs 7, the adhesive base 1 and the elastic membrane 2, the rotation torque performance of the rotating seat 4 can be optimized. The support ribs 7 provide support, the adhesive base 1 plays a stabilizing role, and the elastic membrane 2 can absorb and disperse the torque, thereby achieving a more stable and smooth rotation. This design contributes to the reliability and service life of the injection device.

[0038] In one embodiment, the injection seat 3 includes an injection hose 31 having an injection cavity and a shell 32; the injection hose 31 is arranged at the lower end of the shell 32, the shell 32 is connected to the elastic membrane 2, and the shell 32 is provided with an injection channel 321 which is in linear communication with the injection cavity of the injection hose 31; the injection hose 31 is arranged at the lower end of the shell 32, and has an injection cavity inside it, which is the injection channel 321 for insulin. The shell 32 is the upper structure of the injection hose 31, and it is connected to the elastic membrane 2. This connection ensures that the injection seat 3 can be stably fixed on the elastic membrane 2 and allows the injection seat 3 to move with the deformation of the elastic membrane 2. The shell 32 is provided with an injection channel 321, which is in linear communication with the injection cavity of the injection hose 31. This means that the liquid injected from the injection hose 31 can flow unimpeded along the injection channel 321, ensuring that the liquid can be smoothly injected into the subcutaneous tissue and absorbed.

[0039] In one embodiment, the adhesive base 1 includes an adhesive layer 11 and a base layer 12, the adhesive layer is connected to the base layer 12, the adhesive layer 11 is located at the lower end of the base layer 12, and the adhesive layer 11 is used to be adhered to the skin; the base layer 12 is made of breathable material; the adhesive layer 11 is made of medical-grade adhesive material and can be firmly adhered to the skin to ensure that the injection device is not easy to fall off or shift during use; the base layer 12 is made of breathable material, has good air permeability and moisture absorption, and can effectively prevent the skin from being uncomfortable due to long-term contact with non-breathable materials.

[0040] In one embodiment, the length of the injection hose 31 is 0.5-0.7 cm; a shorter hose length can reduce irritation and discomfort to the patient's skin and improve comfort of use; an appropriate length can ensure smooth flow of the drug during the injection process and reduce the risk of blockage or leakage; the precisely designed length helps to reduce unexpected risks that may be caused by the hose being too long or too short, such as the hose tangling or falling off, etc. This length of injection hose 31 may be particularly suitable for diabetic patients who need frequent subcutaneous injections.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A subcutaneous injection device, characterized in that: It comprises an adhesive base, an elastic membrane, an injection base and a rotating base; the adhesive base is attached to human skin, the elastic membrane is horizontally connected to the adhesive base, and the elastic membrane and the adhesive base are coaxially arranged, the elastic membrane is located on the inner ring of the adhesive base, and the injection base is installed on the adhesive base; the rotating base is installed on the adhesive base and connected to the injection base; the rotating base is used to change the injection angle of the injection base; The rotating seat includes a supporting seat, a first telescopic block, a second telescopic block and a fixing assembly; the supporting seat is mounted on the pasting base, the first telescopic block is slidably connected to the supporting seat, the second telescopic block is embedded in the first telescopic block, the second telescopic block is slidably connected to the first telescopic block, and the end of the second telescopic block away from the first telescopic block is connected to the injection seat, and the connection is located at the top side of the injection seat; the fixing assembly is mounted on the supporting seat and connected to the second telescopic block, and is used to drive the second telescopic block to telescope into the first telescopic block; The fixing assembly includes a tension bar, a sliding block and a sliding groove; one end of the tension bar is fixed to the support seat, and the other end is fixedly connected to the second telescopic block; the sliding groove is arranged on both sides of the support seat, the sliding block is slidably installed with any of the sliding grooves, the sliding block is slidably connected with the second telescopic block, and locking members are installed at both ends of any of the sliding grooves, and the locking members are used to lock the sliding block; the locking member includes a locking block and a locking groove; the locking groove is arranged at both ends of any of the sliding grooves, the locking block is slidably arranged on the sliding block, and the locking block and the locking groove limit cooperation lock the sliding block; the lower end of the locking block is a symmetrical arc structure.

2. A subcutaneous injection device according to claim 1, characterized in that: From the axis of the pasting base to the outside, the top of the supporting seat is a circular arc groove, and the circular arc groove is inclined from bottom to top.

3. A subcutaneous injection device according to claim 1, characterized in that: It also includes two supporting ribs, which are arranged on the elastic membrane and located between the injection seat and the pasting base.

4. A subcutaneous injection device according to claim 3, characterized in that: The strength of the supporting rib is greater than the strength of the sticking base and greater than the strength of the elastic membrane.

5. A subcutaneous injection device according to claim 1, characterized in that: The injection seat includes an injection hose with an injection cavity and a shell; the injection hose is arranged at the lower end of the shell, the shell is connected to the elastic membrane, and the shell is provided with an injection channel which is linearly connected to the injection cavity of the injection hose.

6. A subcutaneous injection device according to claim 1, characterized in that: The adhesive base comprises an adhesive layer and a base layer, wherein the adhesive layer is connected to the base layer and is located at the lower end of the base layer. The adhesive layer is used for being adhered to the skin; and the base layer is made of a breathable material.

7. A subcutaneous injection device according to claim 5, characterized in that: The length of the injection hose is 0.5-0.7 cm.

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